CN113578284A - Quinoa polysaccharide-chitosan composite aerogel and preparation method and application thereof - Google Patents
Quinoa polysaccharide-chitosan composite aerogel and preparation method and application thereof Download PDFInfo
- Publication number
- CN113578284A CN113578284A CN202110884410.7A CN202110884410A CN113578284A CN 113578284 A CN113578284 A CN 113578284A CN 202110884410 A CN202110884410 A CN 202110884410A CN 113578284 A CN113578284 A CN 113578284A
- Authority
- CN
- China
- Prior art keywords
- chitosan
- quinoa
- polysaccharide
- composite aerogel
- quinoa polysaccharide
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 240000006162 Chenopodium quinoa Species 0.000 title claims abstract description 212
- 229920001661 Chitosan Polymers 0.000 title claims abstract description 195
- 239000004964 aerogel Substances 0.000 title claims abstract description 163
- 239000002131 composite material Substances 0.000 title claims abstract description 155
- 238000002360 preparation method Methods 0.000 title claims abstract description 42
- 150000004676 glycans Chemical class 0.000 claims abstract description 76
- 229920001282 polysaccharide Polymers 0.000 claims abstract description 76
- 239000005017 polysaccharide Substances 0.000 claims abstract description 76
- 238000004132 cross linking Methods 0.000 claims abstract description 20
- 229910001385 heavy metal Inorganic materials 0.000 claims abstract description 8
- 239000011148 porous material Substances 0.000 claims abstract description 5
- 238000000034 method Methods 0.000 claims description 34
- 239000011259 mixed solution Substances 0.000 claims description 34
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 31
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 claims description 26
- 239000000126 substance Substances 0.000 claims description 24
- 239000003463 adsorbent Substances 0.000 claims description 22
- 229930182490 saponin Natural products 0.000 claims description 20
- 235000017709 saponins Nutrition 0.000 claims description 20
- 150000007949 saponins Chemical class 0.000 claims description 20
- 150000008442 polyphenolic compounds Chemical class 0.000 claims description 19
- 235000013824 polyphenols Nutrition 0.000 claims description 19
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 19
- 238000002156 mixing Methods 0.000 claims description 18
- SXRSQZLOMIGNAQ-UHFFFAOYSA-N Glutaraldehyde Chemical compound O=CCCCC=O SXRSQZLOMIGNAQ-UHFFFAOYSA-N 0.000 claims description 14
- 239000003431 cross linking reagent Substances 0.000 claims description 14
- 230000002378 acidificating effect Effects 0.000 claims description 13
- 239000002904 solvent Substances 0.000 claims description 12
- 238000004108 freeze drying Methods 0.000 claims description 11
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 8
- 238000007710 freezing Methods 0.000 claims description 8
- 230000008014 freezing Effects 0.000 claims description 8
- JVTAAEKCZFNVCJ-UHFFFAOYSA-N lactic acid Chemical compound CC(O)C(O)=O JVTAAEKCZFNVCJ-UHFFFAOYSA-N 0.000 claims description 8
- 238000003809 water extraction Methods 0.000 claims description 8
- 238000001556 precipitation Methods 0.000 claims description 7
- 239000007788 liquid Substances 0.000 claims description 6
- 239000007864 aqueous solution Substances 0.000 claims description 4
- 239000004310 lactic acid Substances 0.000 claims description 4
- 235000014655 lactic acid Nutrition 0.000 claims description 4
- 239000005416 organic matter Substances 0.000 claims description 4
- 230000006196 deacetylation Effects 0.000 claims description 3
- 238000003381 deacetylation reaction Methods 0.000 claims description 3
- 229930013930 alkaloid Natural products 0.000 claims description 2
- 229930003935 flavonoid Natural products 0.000 claims description 2
- 150000002215 flavonoids Chemical class 0.000 claims description 2
- 235000017173 flavonoids Nutrition 0.000 claims description 2
- 150000002500 ions Chemical class 0.000 claims description 2
- 150000007522 mineralic acids Chemical class 0.000 claims description 2
- 150000007524 organic acids Chemical class 0.000 claims description 2
- 238000001179 sorption measurement Methods 0.000 abstract description 113
- 230000000694 effects Effects 0.000 abstract description 23
- 239000000975 dye Substances 0.000 abstract description 19
- 239000002994 raw material Substances 0.000 abstract description 7
- 239000010865 sewage Substances 0.000 abstract description 2
- 230000002195 synergetic effect Effects 0.000 abstract description 2
- 239000000243 solution Substances 0.000 description 39
- RBTBFTRPCNLSDE-UHFFFAOYSA-N 3,7-bis(dimethylamino)phenothiazin-5-ium Chemical compound C1=CC(N(C)C)=CC2=[S+]C3=CC(N(C)C)=CC=C3N=C21 RBTBFTRPCNLSDE-UHFFFAOYSA-N 0.000 description 21
- 229960000907 methylthioninium chloride Drugs 0.000 description 21
- IQFVPQOLBLOTPF-HKXUKFGYSA-L congo red Chemical compound [Na+].[Na+].C1=CC=CC2=C(N)C(/N=N/C3=CC=C(C=C3)C3=CC=C(C=C3)/N=N/C3=C(C4=CC=CC=C4C(=C3)S([O-])(=O)=O)N)=CC(S([O-])(=O)=O)=C21 IQFVPQOLBLOTPF-HKXUKFGYSA-L 0.000 description 20
- GAMYVSCDDLXAQW-AOIWZFSPSA-N Thermopsosid Natural products O(C)c1c(O)ccc(C=2Oc3c(c(O)cc(O[C@H]4[C@H](O)[C@@H](O)[C@H](O)[C@H](CO)O4)c3)C(=O)C=2)c1 GAMYVSCDDLXAQW-AOIWZFSPSA-N 0.000 description 18
- 229930003944 flavone Natural products 0.000 description 18
- 150000002212 flavone derivatives Chemical class 0.000 description 18
- 235000011949 flavones Nutrition 0.000 description 18
- 239000001397 quillaja saponaria molina bark Substances 0.000 description 18
- VHBFFQKBGNRLFZ-UHFFFAOYSA-N vitamin p Natural products O1C2=CC=CC=C2C(=O)C=C1C1=CC=CC=C1 VHBFFQKBGNRLFZ-UHFFFAOYSA-N 0.000 description 18
- 239000000047 product Substances 0.000 description 16
- 239000000463 material Substances 0.000 description 14
- 238000012360 testing method Methods 0.000 description 12
- 238000005303 weighing Methods 0.000 description 11
- 229960000583 acetic acid Drugs 0.000 description 9
- 238000001035 drying Methods 0.000 description 9
- 239000002351 wastewater Substances 0.000 description 7
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 6
- LNTHITQWFMADLM-UHFFFAOYSA-N gallic acid Chemical compound OC(=O)C1=CC(O)=C(O)C(O)=C1 LNTHITQWFMADLM-UHFFFAOYSA-N 0.000 description 6
- 238000003756 stirring Methods 0.000 description 6
- 229920000858 Cyclodextrin Polymers 0.000 description 5
- 238000011161 development Methods 0.000 description 5
- 238000001914 filtration Methods 0.000 description 5
- 238000011160 research Methods 0.000 description 5
- MIJYXULNPSFWEK-GTOFXWBISA-N 3beta-hydroxyolean-12-en-28-oic acid Chemical compound C1C[C@H](O)C(C)(C)[C@@H]2CC[C@@]3(C)[C@]4(C)CC[C@@]5(C(O)=O)CCC(C)(C)C[C@H]5C4=CC[C@@H]3[C@]21C MIJYXULNPSFWEK-GTOFXWBISA-N 0.000 description 4
- JKLISIRFYWXLQG-UHFFFAOYSA-N Epioleonolsaeure Natural products C1CC(O)C(C)(C)C2CCC3(C)C4(C)CCC5(C(O)=O)CCC(C)(C)CC5C4CCC3C21C JKLISIRFYWXLQG-UHFFFAOYSA-N 0.000 description 4
- 239000001116 FEMA 4028 Substances 0.000 description 4
- YBRJHZPWOMJYKQ-UHFFFAOYSA-N Oleanolic acid Natural products CC1(C)CC2C3=CCC4C5(C)CCC(O)C(C)(C)C5CCC4(C)C3(C)CCC2(C1)C(=O)O YBRJHZPWOMJYKQ-UHFFFAOYSA-N 0.000 description 4
- MIJYXULNPSFWEK-UHFFFAOYSA-N Oleanolinsaeure Natural products C1CC(O)C(C)(C)C2CCC3(C)C4(C)CCC5(C(O)=O)CCC(C)(C)CC5C4=CCC3C21C MIJYXULNPSFWEK-UHFFFAOYSA-N 0.000 description 4
- WHGYBXFWUBPSRW-FOUAGVGXSA-N beta-cyclodextrin Chemical compound OC[C@H]([C@H]([C@@H]([C@H]1O)O)O[C@H]2O[C@@H]([C@@H](O[C@H]3O[C@H](CO)[C@H]([C@@H]([C@H]3O)O)O[C@H]3O[C@H](CO)[C@H]([C@@H]([C@H]3O)O)O[C@H]3O[C@H](CO)[C@H]([C@@H]([C@H]3O)O)O[C@H]3O[C@H](CO)[C@H]([C@@H]([C@H]3O)O)O3)[C@H](O)[C@H]2O)CO)O[C@@H]1O[C@H]1[C@H](O)[C@@H](O)[C@@H]3O[C@@H]1CO WHGYBXFWUBPSRW-FOUAGVGXSA-N 0.000 description 4
- 235000011175 beta-cyclodextrine Nutrition 0.000 description 4
- 229960004853 betadex Drugs 0.000 description 4
- 229940100243 oleanolic acid Drugs 0.000 description 4
- HZLWUYJLOIAQFC-UHFFFAOYSA-N prosapogenin PS-A Natural products C12CC(C)(C)CCC2(C(O)=O)CCC(C2(CCC3C4(C)C)C)(C)C1=CCC2C3(C)CCC4OC1OCC(O)C(O)C1O HZLWUYJLOIAQFC-UHFFFAOYSA-N 0.000 description 4
- 238000004065 wastewater treatment Methods 0.000 description 4
- JMGZEFIQIZZSBH-UHFFFAOYSA-N Bioquercetin Natural products CC1OC(OCC(O)C2OC(OC3=C(Oc4cc(O)cc(O)c4C3=O)c5ccc(O)c(O)c5)C(O)C2O)C(O)C(O)C1O JMGZEFIQIZZSBH-UHFFFAOYSA-N 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 3
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 229910052799 carbon Inorganic materials 0.000 description 3
- IVTMALDHFAHOGL-UHFFFAOYSA-N eriodictyol 7-O-rutinoside Natural products OC1C(O)C(O)C(C)OC1OCC1C(O)C(O)C(O)C(OC=2C=C3C(C(C(O)=C(O3)C=3C=C(O)C(O)=CC=3)=O)=C(O)C=2)O1 IVTMALDHFAHOGL-UHFFFAOYSA-N 0.000 description 3
- 229940074391 gallic acid Drugs 0.000 description 3
- 235000004515 gallic acid Nutrition 0.000 description 3
- 239000012528 membrane Substances 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 229920000642 polymer Polymers 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- FDRQPMVGJOQVTL-UHFFFAOYSA-N quercetin rutinoside Natural products OC1C(O)C(O)C(CO)OC1OCC1C(O)C(O)C(O)C(OC=2C(C3=C(O)C=C(O)C=C3OC=2C=2C=C(O)C(O)=CC=2)=O)O1 FDRQPMVGJOQVTL-UHFFFAOYSA-N 0.000 description 3
- IKGXIBQEEMLURG-BKUODXTLSA-N rutin Chemical compound O[C@H]1[C@H](O)[C@@H](O)[C@H](C)O[C@@H]1OC[C@H]1[C@H](O)[C@@H](O)[C@H](O)[C@@H](OC=2C(C3=C(O)C=C(O)C=C3OC=2C=2C=C(O)C(O)=CC=2)=O)O1 IKGXIBQEEMLURG-BKUODXTLSA-N 0.000 description 3
- ALABRVAAKCSLSC-UHFFFAOYSA-N rutin Natural products CC1OC(OCC2OC(O)C(O)C(O)C2O)C(O)C(O)C1OC3=C(Oc4cc(O)cc(O)c4C3=O)c5ccc(O)c(O)c5 ALABRVAAKCSLSC-UHFFFAOYSA-N 0.000 description 3
- 235000005493 rutin Nutrition 0.000 description 3
- 229960004555 rutoside Drugs 0.000 description 3
- 239000000523 sample Substances 0.000 description 3
- 229920006395 saturated elastomer Polymers 0.000 description 3
- 239000011734 sodium Substances 0.000 description 3
- 238000002411 thermogravimetry Methods 0.000 description 3
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 238000005033 Fourier transform infrared spectroscopy Methods 0.000 description 2
- 238000002835 absorbance Methods 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 239000000980 acid dye Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000010000 carbonizing Methods 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 238000004043 dyeing Methods 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 238000005227 gel permeation chromatography Methods 0.000 description 2
- 239000012362 glacial acetic acid Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 230000031700 light absorption Effects 0.000 description 2
- 239000012299 nitrogen atmosphere Substances 0.000 description 2
- VLTRZXGMWDSKGL-UHFFFAOYSA-N perchloric acid Chemical compound OCl(=O)(=O)=O VLTRZXGMWDSKGL-UHFFFAOYSA-N 0.000 description 2
- 230000001376 precipitating effect Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000004626 scanning electron microscopy Methods 0.000 description 2
- LPXPTNMVRIOKMN-UHFFFAOYSA-M sodium nitrite Chemical compound [Na+].[O-]N=O LPXPTNMVRIOKMN-UHFFFAOYSA-M 0.000 description 2
- 239000012086 standard solution Substances 0.000 description 2
- 239000007858 starting material Substances 0.000 description 2
- 238000002076 thermal analysis method Methods 0.000 description 2
- 230000004580 weight loss Effects 0.000 description 2
- BNGXYYYYKUGPPF-UHFFFAOYSA-M (3-methylphenyl)methyl-triphenylphosphanium;chloride Chemical compound [Cl-].CC1=CC=CC(C[P+](C=2C=CC=CC=2)(C=2C=CC=CC=2)C=2C=CC=CC=2)=C1 BNGXYYYYKUGPPF-UHFFFAOYSA-M 0.000 description 1
- IXPNQXFRVYWDDI-UHFFFAOYSA-N 1-methyl-2,4-dioxo-1,3-diazinane-5-carboximidamide Chemical compound CN1CC(C(N)=N)C(=O)NC1=O IXPNQXFRVYWDDI-UHFFFAOYSA-N 0.000 description 1
- 239000002028 Biomass Substances 0.000 description 1
- 239000004966 Carbon aerogel Substances 0.000 description 1
- 235000015493 Chenopodium quinoa Nutrition 0.000 description 1
- YASYEJJMZJALEJ-UHFFFAOYSA-N Citric acid monohydrate Chemical compound O.OC(=O)CC(O)(C(O)=O)CC(O)=O YASYEJJMZJALEJ-UHFFFAOYSA-N 0.000 description 1
- 241000196324 Embryophyta Species 0.000 description 1
- SJEYSFABYSGQBG-UHFFFAOYSA-M Patent blue Chemical compound [Na+].C1=CC(N(CC)CC)=CC=C1C(C=1C(=CC(=CC=1)S([O-])(=O)=O)S([O-])(=O)=O)=C1C=CC(=[N+](CC)CC)C=C1 SJEYSFABYSGQBG-UHFFFAOYSA-M 0.000 description 1
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 1
- 229920002565 Polyethylene Glycol 400 Polymers 0.000 description 1
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 1
- 239000006087 Silane Coupling Agent Substances 0.000 description 1
- 229920002472 Starch Polymers 0.000 description 1
- 238000007792 addition Methods 0.000 description 1
- 239000002156 adsorbate Substances 0.000 description 1
- 239000000440 bentonite Substances 0.000 description 1
- 229910000278 bentonite Inorganic materials 0.000 description 1
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 description 1
- 238000006065 biodegradation reaction Methods 0.000 description 1
- 239000001913 cellulose Substances 0.000 description 1
- 229920002678 cellulose Polymers 0.000 description 1
- 235000010980 cellulose Nutrition 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000012512 characterization method Methods 0.000 description 1
- 238000010382 chemical cross-linking Methods 0.000 description 1
- 238000009388 chemical precipitation Methods 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 229960002303 citric acid monohydrate Drugs 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000008367 deionised water Substances 0.000 description 1
- 229910021641 deionized water Inorganic materials 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000010790 dilution Methods 0.000 description 1
- 239000012895 dilution Substances 0.000 description 1
- 239000012153 distilled water Substances 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000010919 dye waste Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000012869 ethanol precipitation Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 239000005457 ice water Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000002440 industrial waste Substances 0.000 description 1
- 238000002329 infrared spectrum Methods 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 229940107698 malachite green Drugs 0.000 description 1
- FDZZZRQASAIRJF-UHFFFAOYSA-M malachite green Chemical compound [Cl-].C1=CC(N(C)C)=CC=C1C(C=1C=CC=CC=1)=C1C=CC(=[N+](C)C)C=C1 FDZZZRQASAIRJF-UHFFFAOYSA-M 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 238000001000 micrograph Methods 0.000 description 1
- 238000002715 modification method Methods 0.000 description 1
- 229910000403 monosodium phosphate Inorganic materials 0.000 description 1
- 235000019799 monosodium phosphate Nutrition 0.000 description 1
- 229920005615 natural polymer Polymers 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 description 1
- 229920000620 organic polymer Polymers 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- 230000000379 polymerizing effect Effects 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 239000002243 precursor Substances 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 239000012488 sample solution Substances 0.000 description 1
- HFHDHCJBZVLPGP-UHFFFAOYSA-N schardinger α-dextrin Chemical compound O1C(C(C2O)O)C(CO)OC2OC(C(C2O)O)C(CO)OC2OC(C(C2O)O)C(CO)OC2OC(C(O)C2O)C(CO)OC2OC(C(C2O)O)C(CO)OC2OC2C(O)C(O)C1OC2CO HFHDHCJBZVLPGP-UHFFFAOYSA-N 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 235000010413 sodium alginate Nutrition 0.000 description 1
- 239000000661 sodium alginate Substances 0.000 description 1
- 229940005550 sodium alginate Drugs 0.000 description 1
- AJPJDKMHJJGVTQ-UHFFFAOYSA-M sodium dihydrogen phosphate Chemical compound [Na+].OP(O)([O-])=O AJPJDKMHJJGVTQ-UHFFFAOYSA-M 0.000 description 1
- 235000010288 sodium nitrite Nutrition 0.000 description 1
- 239000008107 starch Substances 0.000 description 1
- 235000019698 starch Nutrition 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000000352 supercritical drying Methods 0.000 description 1
- 239000002352 surface water Substances 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000013077 target material Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 238000003911 water pollution Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/22—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising organic material
- B01J20/26—Synthetic macromolecular compounds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/28—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties
- B01J20/28002—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties characterised by their physical properties
- B01J20/28011—Other properties, e.g. density, crush strength
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/28—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties
- B01J20/28014—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties characterised by their form
- B01J20/28047—Gels
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/285—Treatment of water, waste water, or sewage by sorption using synthetic organic sorbents
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/103—Arsenic compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/20—Heavy metals or heavy metal compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
- C02F2101/308—Dyes; Colorants; Fluorescent agents
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
- C02F2101/34—Organic compounds containing oxygen
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
- C02F2101/36—Organic compounds containing halogen
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
- C02F2101/38—Organic compounds containing nitrogen
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
- C02F2101/40—Organic compounds containing sulfur
Abstract
The invention provides quinoa polysaccharide-chitosan composite aerogel and a preparation method and application thereof, wherein the quinoa polysaccharide-chitosan composite aerogel is obtained by cross-linking quinoa polysaccharide and chitosan; the quinoa polysaccharide-chitosan composite aerogel has a three-dimensional network structure. Through the synergistic effect of the quinoa polysaccharide and the chitosan, the quinoa polysaccharide-chitosan composite aerogel has rich microscopic pore diameters, good adsorption effect, high stability and high mechanical strength, and has excellent adsorption performance on dyes, heavy metals, arsenide and natural organic matters; the preparation method is simple, the raw material source is wide, simple, efficient and green preparation can be realized, and a new idea is provided for sewage treatment.
Description
Technical Field
The invention belongs to the technical field of adsorption materials, and particularly relates to quinoa polysaccharide-chitosan composite aerogel and a preparation method and application thereof.
Background
The most common pollution of surface water comprises organic pollution, heavy metal pollution, eutrophic pollution, composite pollution and the like, water body pollution directly influences the health of people and the development of society, and the treatment and purification of wastewater are main means for solving the problem of water pollution, so that the development of an effective wastewater treatment method is an important research topic. The conventional methods for treating wastewater at present comprise a membrane separation method, a chemical precipitation method, a chemical oxidation method, an adsorption method, a biodegradation method and the like, wherein the adsorption method has the advantages of wide application range, no secondary pollution, simplicity, convenience, practicability and the like, and is widely applied to wastewater treatment.
In the adsorption method, the adsorption performance of the adsorbent is the key of the wastewater treatment effect, and the traditional adsorbent comprises activated carbon, bentonite, biomass materials, synthetic resin and the like. In recent years, with the increasing importance of green chemical and ecological safety issues, adsorbents with natural, degradable, and renewable properties have attracted much attention.
The natural polysaccharide is an important natural polymer with wide distribution and rich resources in the natural world, and has various varieties, and mainly comprises chitosan, cellulose, sodium alginate, starch, cyclodextrin and the like. Because of the diversity of the structure, low price, easy availability, reproducibility and the characteristic of being degraded by microorganisms of the natural polysaccharide, the development of various new adsorbing materials by using the natural polysaccharide as a raw material has good research prospect. For example, CN102671631A discloses a preparation method of an adsorbent for acid dye wastewater treatment, which comprises the following steps: firstly, placing beta-cyclodextrin into citric acid monohydrate, adding PEG-400 and sodium dihydrogen phosphate, and polymerizing to obtain a beta-cyclodextrin polymer; and then adding a silane coupling agent into the chitosan solution, and crosslinking the beta-cyclodextrin polymer and chitosan, wherein the molar ratio of the chitosan to the beta-cyclodextrin polymer is 1:3, so as to obtain the beta-cyclodextrin-chitosan porous membrane, and the porous membrane can be used for adsorbing acid dyes in printing and dyeing wastewater. CN108126671A discloses a supported chitosan adsorbent and a preparation method and application thereof, wherein chitosan is used as a raw material, the chitosan is subjected to heat treatment modification to obtain nano nitrogen-containing carbon spheres, and then the modified chitosan is used as a carrier to load chitosan powder to obtain the supported chitosan nano adsorbent, and the adsorbent has a good application prospect in the aspect of adsorption of dye wastewater and heavy metal wastewater. However, the above adsorbent has a low porosity and the adsorption efficiency is in need of improvement.
In order to improve the adsorption effect of the adsorbent, research works are currently carried out to introduce aerogel into the preparation of the adsorbent, and aerogel materials have abundant porous structures, low density and high specific surface area, and are beneficial to improving the adsorption efficiency. The natural polysaccharide-based aerogel is prepared by taking natural polysaccharide as a precursor and performing supercritical drying or freeze drying. The natural polysaccharide-based aerogel serving as a third-generation aerogel following inorganic aerogel and organic polymer aerogel has the characteristics of the traditional aerogel and also has the excellent performances of greenness, reproducibility, degradability and the like, and becomes a hot spot in research and application of natural high polymer materials. For example, CN111389358A discloses a preparation method of a modified nitrogen-doped carbon aerogel, which comprises the following steps: mixing chitosan powder with an acetic acid solution, freeze-drying, then placing a sample in a tubular furnace, carbonizing at high temperature under the protection of nitrogen, taking out, placing the sample in a high-concentration potassium hydroxide solution, soaking, filtering, drying, carbonizing at high temperature in the tubular furnace in a nitrogen atmosphere again, and finally cleaning, filtering and drying to obtain a target material; the material is used as an adsorbent in water treatment, and can be applied to adsorbing malachite green and the like in water. However, natural polysaccharide-based aerogels (e.g., chitosan aerogels) often suffer from stability problems, especially poor stability in acidic environments; the chemical crosslinking and modification method is complicated, and the crosslinking or modification can affect the adsorption performance. Therefore, the adsorbent for water treatment also has the problems of single raw material source, complex preparation process (even environmental pollution), difficult recovery and the like.
Therefore, the development of an adsorption material with excellent adsorption performance, environmental protection and simple preparation method is a problem to be solved in the field.
Disclosure of Invention
Aiming at the defects of the prior art, the invention aims to provide the quinoa polysaccharide-chitosan composite aerogel and the preparation method and application thereof.
In order to achieve the purpose, the invention adopts the following technical scheme:
in a first aspect, the invention provides quinoa polysaccharide-chitosan composite aerogel, wherein the quinoa polysaccharide-chitosan composite aerogel is obtained by cross-linking quinoa polysaccharide and chitosan; the quinoa polysaccharide-chitosan composite aerogel has a three-dimensional network structure.
The quinoa is a dicotyledonous plant, quinoa seeds contain about 60% of polysaccharide, the quinoa polysaccharide-chitosan composite aerogel provided by the invention is obtained by crosslinking quinoa polysaccharide and chitosan, wherein the quinoa polysaccharide and the chitosan are both bio-based polysaccharides and have the characteristics of being green, environment-friendly and degradable, and the quinoa polysaccharide-chitosan composite aerogel has a three-dimensional network structure, contains abundant micro-pores, is good in adsorption effect, high in stability and mechanical strength, and has excellent adsorption performance on dyes, heavy metals, arsenide and natural organic matters; and the preparation method is simple, the raw material sources are wide, and simple, efficient and green preparation can be realized.
Preferably, the pore size of the quinoa polysaccharide-chitosan composite aerogel is 20-150 μm, for example, 30 μm, 40 μm, 50 μm, 60 μm, 70 μm, 80 μm, 90 μm, 100 μm, 110 μm, 120 μm, 130 μm or 140 μm, and specific values therebetween are not exhaustive, and for brevity, the invention does not list the specific values included in the range.
Preferably, the specific surface area of the quinoa polysaccharide-chitosan composite aerogel is 10-100 m2A value of,/g, for example, 15m2/g、20m2/g、30m2/g、40m2/g、50m2/g、60m2/g、70m2/g、80m2/g、90m2(ii)/g or 95m2The present invention is not intended to be exhaustive of the specific point values included in the ranges, limited to space and for the sake of brevity, as well as the specific point values between the point values recited above.
Preferably, the quinoa polysaccharide has a mass of 5-50% based on 100% of the sum of the masses of quinoa polysaccharide and chitosan, for example, 6%, 8%, 10%, 12%, 15%, 18%, 20%, 22%, 25%, 28%, 30%, 32%, 35%, 38%, 40%, 42%, 45% or 48%, and specific values therebetween, which are not limited to space and for brevity, the present invention does not provide an exhaustive list of specific values included in the range.
As a preferred technical scheme, the quinoa polysaccharide and chitosan are counted by taking the total amount of 100%, and the quinoa polysaccharide accounts for 5-50% by mass, so that the quinoa polysaccharide-chitosan composite aerogel has excellent adsorption effect, high stability and high mechanical strength. If the content of quinoa polysaccharide is too low, the adsorption performance of the composite aerogel is reduced; if the quinoa polysaccharide content is too high, the composite aerogel material becomes brittle and the mechanical strength is reduced.
Preferably, the molecular weight of the quinoa polysaccharide is 10000-20000 Da, for example 11000Da, 12000Da, 13000Da, 14000Da, 15000Da, 16000Da, 17000Da, 18000Da or 19000Da, and specific point values between the above point values are limited by space and in the interest of conciseness, and the invention does not exhaust the specific point values included in the range, and further preferably 15000 Da.
Preferably, the quinoa polysaccharide can be purchased in a market way, and can also be extracted from quinoa grains; the extraction method comprises a water extraction and alcohol precipitation method and the like which are conventional in the field.
Preferably, the quinoa polysaccharide is extracted by the following method, and the method comprises the following steps: and mixing quinoa seeds with water, and extracting by a water extraction and alcohol precipitation method to obtain the quinoa polysaccharide.
Preferably, the feed-liquid ratio of the quinoa seeds to water is 1 (10-30), for example, the ratio can be 1:11, 1:13, 1:15, 1:17, 1:19, 1:20, 1:21, 1:23, 1:25, 1:27 or 1: 29; specifically, the material-liquid ratio is a mass/volume ratio (m/v), namely the mass of the chenopodium quinoa seeds is 1g, and the volume of water is 10-30 mL.
Preferably, the alcohol in the water extraction and alcohol precipitation method is ethanol.
Preferably, after ethanol is added in the water extraction and ethanol precipitation method, the volume percentage of ethanol in the system is 50-80%, for example, 52%, 55%, 58%, 60%, 62%, 68%, 70%, 72%, 75% or 78%, and specific values therebetween, which are limited by space and for brevity, the invention is not exhaustive.
Preferably, the molecular weight of the chitosan is 500000-2000000 Da, for example, 600000Da, 700000Da, 800000Da, 900000Da, 1000000Da, 1100000Da, 1300000Da, 1500000Da, 1700000Da or 1900000Da, and specific values therebetween, such as space and brevity, are not exhaustive.
Preferably, the chitosan has a deacetylation degree of 75-95%, for example, 76%, 78%, 80%, 81%, 83%, 85%, 87%, 89%, 90%, 91%, 93%, or 94%, and specific values therebetween, including for brevity and conciseness, are not exhaustive.
In a second aspect, the present invention provides a preparation method of the quinoa polysaccharide-chitosan composite aerogel according to the first aspect, the preparation method comprising the following steps:
(1) mixing quinoa polysaccharide, chitosan and a solvent to obtain a mixed solution;
(2) freeze-drying the mixed solution obtained in the step (1) to obtain a freeze-dried product;
(3) and (3) crosslinking the freeze-dried product obtained in the step (2) to obtain the quinoa polysaccharide-chitosan composite aerogel.
Preferably, the mass ratio of the quinoa polysaccharide to the chitosan in the step (1) is 1 (1-19), and may be 1:2, 1:3, 1:4, 1:5, 1:6, 1:7, 1:8, 1:9, 1:10, 1:11, 1:13, 1:15, 1:17, 1:18, or the like.
Preferably, the sum of the concentrations of quinoa polysaccharide and chitosan in the mixed solution of step (1) is 10-50 mg/mL, such as 12mg/mL, 15mg/mL, 18mg/mL, 20mg/mL, 22mg/mL, 25mg/mL, 28mg/mL, 30mg/mL, 32mg/mL, 35mg/mL, 38mg/mL, 40mg/mL, 42mg/mL, 45mg/mL or 48mg/mL, and the specific points therebetween are limited by space and for brevity, and the invention is not exhaustive.
Preferably, the solvent in step (1) is an aqueous solution containing an acidic substance.
Preferably, the acidic substance is an organic acid and/or an inorganic acid.
Preferably, the acidic substance comprises any one of hydrochloric acid, acetic acid or lactic acid or a combination of at least two thereof.
Preferably, the content of the acidic substance in the solvent is 0.5-5% by mass, for example, 0.8%, 1%, 1.2%, 1.5%, 1.8%, 2%, 2.2%, 2.5%, 2.8%, 3%, 3.2%, 3.5%, 3.8%, 4%, 4.2%, 4.5% or 4.8%, and the specific values between the above values are not exhaustive and for brevity, and the invention does not list the specific values included in the range, and more preferably 1-2%.
Preferably, the mixing in step (1) comprises the following specific steps: uniformly mixing quinoa polysaccharide and a chitosan solution to obtain a mixed solution; the solvent of the chitosan solution is a dilute acid solution with the concentration of 1-2% (such as 1.1%, 1.2%, 1.3%, 1.4%, 1.5%, 1.6%, 1.7%, 1.8% or 1.9% and the like); wherein the dilute acid comprises any one or combination of at least two of hydrochloric acid, acetic acid or lactic acid.
Preferably, the mixed solution in the step (1) further comprises a cross-linking agent.
Preferably, the cross-linking agent comprises glutaraldehyde.
Preferably, the mass of the cross-linking agent is 0.01-2%, for example, 0.03%, 0.05%, 0.08%, 0.1%, 0.3%, 0.5%, 0.8%, 1%, 1.1%, 1.3%, 1.5%, 1.7%, or 1.9% based on 100% of the sum of the masses of the quinoa polysaccharide and chitosan, and specific values between the above values are not exhaustive, and for brevity, the invention does not include the specific values included in the range, and more preferably 0.1-0.5%.
Preferably, the freezing temperature of the freeze-drying in the step (2) is-20 to-80 ℃, and for example, may be-22 ℃, -25 ℃, -28 ℃, -30 ℃, -35 ℃, -40 ℃, -45 ℃, -50 ℃, -55 ℃, -60 ℃, -65 ℃, -70 ℃, -75 ℃ or-78 ℃, and the specific values therebetween are limited to space and for the sake of brevity, and the present invention is not exhaustive enumeration of the specific values included in the range.
Preferably, the freeze-drying time in step (2) is 24-48 h, such as 26h, 28h, 30h, 32h, 34h, 36h, 38h, 40h, 42h, 45h or 47h, and specific values therebetween, which are limited by space and for brevity, the invention is not exhaustive.
Preferably, the freeze-drying of step (2) comprises the following steps: the mixed solution was placed in a mold, and then freeze-dried.
Preferably, the mold is made of cylindrical plastic and a material with a heat conducting function.
Preferably, the temperature of the crosslinking in the step (3) is 100-200 ℃, for example, it may be 110 ℃, 120 ℃, 130 ℃, 140 ℃, 150 ℃, 160 ℃, 170 ℃, 180 ℃ or 190 ℃, and the specific values therebetween are limited by space and for brevity, and the invention is not exhaustive of the specific values included in the range.
Preferably, the crosslinking time in step (3) is 10-60 min, for example, 15min, 20min, 25min, 30min, 35min, 40min, 45min, 50min or 55min, and the specific values therebetween are limited by space and for brevity, the invention is not exhaustive.
Preferably, the preparation method specifically comprises the following steps:
(1) mixing quinoa polysaccharide, chitosan, a cross-linking agent and a solvent to obtain a mixed solution; the mass ratio of the quinoa polysaccharide to the chitosan is 1 (1-19), and the sum of the concentrations of the quinoa polysaccharide and the chitosan in the mixed solution is 10-50 mg/mL; the solvent is an aqueous solution containing acidic substances, and the mass percentage of the acidic substances is 0.5-5%;
(2) freeze-drying the mixed solution obtained in the step (1) for 24-48 h to obtain a freeze-dried product;
(3) and (3) crosslinking the freeze-dried product obtained in the step (2) at 100-200 ℃ for 10-60 min to obtain the quinoa polysaccharide-chitosan composite aerogel.
In a third aspect, the present invention provides a composite adsorbent, which comprises the quinoa polysaccharide-chitosan composite aerogel according to the first aspect.
In a fourth aspect, the invention provides a quinoa polysaccharide-chitosan composite aerogel as described in the first aspect, for use in water treatment.
Preferably, the quinoa polysaccharide-chitosan composite aerogel is used as an adsorbent in water treatment.
Preferably, the quinoa polysaccharide-chitosan composite aerogel material is made into various shapes and used for adsorbing heavy metals in dyeing waste or industrial waste liquid in dye waste liquid.
Preferably, the quinoa polysaccharide-chitosan composite aerogel material is made into various shapes and used for adsorbing natural organic matters.
Preferably, the quinoa polysaccharide-chitosan composite aerogel is used as an adsorbent in water treatment to adsorb any one or a combination of at least two of heavy metal ions, arsenide or organic matters.
Preferably, the organic substance comprises a synthetic organic dye and/or a natural organic substance.
Preferably, the natural organic substance comprises any one of or a combination of at least two of alkaloids, saponins, polyphenols or flavonoids.
Compared with the prior art, the invention has the following beneficial effects:
the quinoa polysaccharide-chitosan composite aerogel provided by the invention is obtained by cross-linking quinoa polysaccharide and chitosan, and has abundant microscopic pore sizes, good adsorption effect, high stability, high mechanical strength, excellent adsorption performance on dyes, heavy metals, arsenide and natural organic matters, Congo red adsorption capacity of more than 342mg/g, methylene blue adsorption capacity of more than 18mg/g, and high adsorption capacity on natural organic matters such as saponin, flavone and polyphenol through the synergistic effect of quinoa polysaccharide and chitosan; the preparation method is simple, the raw material source is wide, simple, efficient and green preparation can be realized, and a new idea is provided for sewage treatment.
Drawings
Fig. 1 is a scanning electron microscope image of quinoa polysaccharide-chitosan composite aerogel provided in example 6;
FIG. 2 is an infrared spectrum of quinoa polysaccharide-chitosan composite aerogel provided in example 6;
FIG. 3 is a thermal analysis graph of quinoa polysaccharide-chitosan composite aerogel provided in example 6;
FIG. 4 is a mechanical strength test chart of quinoa polysaccharide-chitosan composite aerogel provided in example 6, wherein (a)5g of weight, (b)10g of weight, (c)20g of weight, and (d)100g of weight;
FIG. 5 is a graph showing the effect of mass ratio of quinoa polysaccharide to chitosan on dye adsorption performance;
FIG. 6 is a graph showing the effect of different crosslinking temperatures on the performance of an adsorbed dye;
FIG. 7 is a graph showing the results of different adsorption times on the performance of adsorbed dyes;
FIG. 8 is a graph showing the effect of different adsorption temperatures on the performance of adsorbed dyes;
FIG. 9 is a graph showing the effect of different adsorption pH values on the performance of adsorbed dyes;
FIG. 10 is a graph showing the effect of different dosages of quinoa polysaccharide-chitosan composite aerogel on Congo red adsorption performance, wherein (a) is 1mg, (b) is 5mg, and (c) is 10 mg;
FIG. 11 is a graph showing the effect of different dosages of quinoa polysaccharide-chitosan composite aerogel on methylene blue adsorption performance, wherein (a) is 1mg, (b) is 5mg, and (c) is 10 mg;
FIG. 12 is a result chart of the effect of different dosages of quinoa polysaccharide-chitosan composite aerogel on the performance of adsorbing natural organic substances;
FIG. 13 is a graph showing the effect of different initial concentrations on the performance of adsorbed natural organic substances;
FIG. 14 is a graph showing the effect of different adsorption temperatures on the performance of adsorbing natural organic substances;
FIG. 15 is a graph showing the effect of different adsorption times on the performance of adsorbing natural organic substances;
FIG. 16 is a graph showing the effect of different adsorption pH values on the performance of adsorbing natural organic substances.
Detailed Description
The technical solution of the present invention is further explained by the following embodiments. It should be understood by those skilled in the art that the examples are only for the understanding of the present invention and should not be construed as the specific limitations of the present invention.
The quinoa polysaccharide used in the following embodiments of the invention is extracted from quinoa seeds, the extraction method is a water extraction and alcohol precipitation method, and the specific steps are as follows:
grinding dried quinoa seeds (1kg) into powder, and extracting with deionized water for 2 times at 60 deg.C for 2 hr at a ratio of 1: 10; mixing 2 parts of the extractive solutions, concentrating by a rotary evaporator, adding ethanol (95%, 3 volume equivalent) for precipitating with ethanol at 4 deg.C for 12 hr; precipitating with ethanol, centrifuging at 4000rpm for 10min, washing the precipitate with ethanol, acetone and diethyl ether, respectively, and drying to obtain quinoa polysaccharide with molecular weight of 15000Da (obtained by gel chromatography, GPC, Agilent 1260).
The chitosan used in the following examples of the present invention was purchased from the national pharmaceutical group and had a degree of deacetylation of 80%.
Example 1
A quinoa polysaccharide-chitosan composite aerogel and a preparation method thereof are disclosed, and the preparation method comprises the following steps:
(1) weighing quinoa polysaccharide and chitosan according to the mass ratio of 1:1, adding a cross-linking agent (glutaraldehyde) and a 1% acetic acid solution, and stirring and mixing uniformly to obtain a mixed solution; the total concentration of quinoa polysaccharide and chitosan in the mixed solution is 20mg/mL, and the mass of glutaraldehyde is 0.2% by taking the sum of the masses of quinoa polysaccharide and chitosan as 100%;
(2) placing the mixed solution obtained in the step (1) in a mould, freezing at-80 ℃, and placing in a freeze dryer for drying to obtain a freeze-dried product;
(3) and (3) placing the freeze-dried product obtained in the step (2) in an oven at 100 ℃ for treatment for 60min to obtain the quinoa polysaccharide-chitosan composite aerogel.
Example 2
A quinoa polysaccharide-chitosan composite aerogel and a preparation method thereof are disclosed, and the preparation method comprises the following steps:
(1) weighing quinoa polysaccharide and chitosan according to the mass ratio of 1:2, adding a cross-linking agent (glutaraldehyde) and a 2% hydrochloric acid solution, and stirring and mixing uniformly to obtain a mixed solution; the total concentration of quinoa polysaccharide and chitosan in the mixed solution is 20mg/mL, and the mass of glutaraldehyde is 0.2% by taking the sum of the masses of quinoa polysaccharide and chitosan as 100%;
(2) placing the mixed solution obtained in the step (1) in a mould, freezing at-80 ℃, and placing in a freeze dryer for drying to obtain a freeze-dried product;
(3) and (3) placing the freeze-dried product obtained in the step (2) in an oven at 125 ℃ for treatment for 50min to obtain the quinoa polysaccharide-chitosan composite aerogel.
Example 3
A quinoa polysaccharide-chitosan composite aerogel and a preparation method thereof are disclosed, and the preparation method comprises the following steps:
(1) weighing quinoa polysaccharide and chitosan according to the mass ratio of 1:3, adding a cross-linking agent (glutaraldehyde) and a 2% acetic acid solution, and stirring and mixing uniformly to obtain a mixed solution; the total concentration of quinoa polysaccharide and chitosan in the mixed solution is 20mg/mL, and the mass of glutaraldehyde is 0.2% by taking the sum of the masses of quinoa polysaccharide and chitosan as 100%;
(2) placing the mixed solution obtained in the step (1) in a mould, freezing at-80 ℃, and placing in a freeze dryer for drying to obtain a freeze-dried product;
(3) and (3) placing the freeze-dried product obtained in the step (2) in an oven at 150 ℃ for treatment for 40min to obtain the quinoa polysaccharide-chitosan composite aerogel.
Example 4
A quinoa polysaccharide-chitosan composite aerogel and a preparation method thereof are disclosed, and the preparation method comprises the following steps:
(1) weighing quinoa polysaccharide and chitosan according to the mass ratio of 1:1, adding a cross-linking agent (glutaraldehyde) and 1.5% of lactic acid solution, and stirring and mixing uniformly to obtain a mixed solution; the total concentration of quinoa polysaccharide and chitosan in the mixed solution is 20mg/mL, and the mass of glutaraldehyde is 0.2% by taking the sum of the masses of quinoa polysaccharide and chitosan as 100%;
(2) placing the mixed solution obtained in the step (1) in a mould, freezing at-80 ℃, and placing in a freeze dryer for drying to obtain a freeze-dried product;
(3) and (3) placing the freeze-dried product obtained in the step (2) in an oven at 175 ℃ for treatment for 30min to obtain the quinoa polysaccharide-chitosan composite aerogel.
Example 5
A quinoa polysaccharide-chitosan composite aerogel and a preparation method thereof are disclosed, and the preparation method comprises the following steps:
(1) weighing quinoa polysaccharide and chitosan according to the mass ratio of 1:5, adding a cross-linking agent (glutaraldehyde) and a 1.5% acetic acid solution, and stirring and mixing uniformly to obtain a mixed solution; the total concentration of quinoa polysaccharide and chitosan in the mixed solution is 20mg/mL, and the mass of glutaraldehyde is 0.2% by taking the sum of the masses of quinoa polysaccharide and chitosan as 100%;
(2) placing the mixed solution obtained in the step (1) in a mould, freezing at-80 ℃, and placing in a freeze dryer for drying to obtain a freeze-dried product;
(3) and (3) placing the freeze-dried product obtained in the step (2) in an oven at 200 ℃ for treatment for 30min to obtain the quinoa polysaccharide-chitosan composite aerogel.
Example 6
A quinoa polysaccharide-chitosan composite aerogel and a preparation method thereof are disclosed, and the preparation method comprises the following steps:
(1) weighing quinoa polysaccharide and chitosan according to the mass ratio of 1:1, adding a cross-linking agent (glutaraldehyde) and a 2% acetic acid solution, and stirring and mixing uniformly to obtain a mixed solution; the total concentration of quinoa polysaccharide and chitosan in the mixed solution is 20mg/mL, and the mass of glutaraldehyde is 0.2% by taking the sum of the masses of quinoa polysaccharide and chitosan as 100%;
(2) placing the mixed solution obtained in the step (1) in a mould, freezing at-80 ℃, and placing in a freeze dryer for drying to obtain a freeze-dried product;
(3) and (3) placing the freeze-dried product obtained in the step (2) in an oven at 175 ℃ for treatment for 30min to obtain the quinoa polysaccharide-chitosan composite aerogel.
Examples 7 to 11
The quinoa polysaccharide-chitosan composite aerogel and the preparation method thereof are different from the preparation method in example 6 only in that the mass ratios of quinoa polysaccharide and chitosan in the step (1) are 1:4, 1:9, 1:19, 1:49 and 1:99 respectively; the amounts of other raw materials and the preparation process parameters were the same as in example 6.
Examples 12 to 15
Quinoa polysaccharide-chitosan composite aerogel and a preparation method thereof, which are different from the preparation method of example 6 only in that the treatment temperatures in the step (3) are 100 ℃, 125 ℃, 150 ℃ and 200 ℃ respectively; the amounts of starting materials and other process parameters were the same as in example 6.
Comparative example 1
A chitosan aerogel and a preparation method thereof, which are different from the chitosan aerogel in example 6 only in that quinoa polysaccharide in the step (1) is replaced by the same amount of chitosan; the amounts of starting materials and other process parameters were the same as in example 6.
Structural characterization with performance test:
(1) micro-morphology
Scanning electron microscopy (SEM, JSM-6700F, JEOL) is adopted to test the surface micro-morphology of the quinoa polysaccharide-chitosan composite aerogel, exemplarily, a scanning electron microscopy image of the quinoa polysaccharide-chitosan composite aerogel provided in example 6 is shown in fig. 1, and as can be seen from fig. 1, the quinoa polysaccharide-chitosan composite aerogel presents a porous, loose and good-flexibility structure, and the structural feature is favorable for effective adsorption of the composite aerogel on substances such as dye and pigment.
(2) Infrared testing
Quinoa polysaccharide-chitosan composite aerogels were tested by fourier transform infrared spectroscopy (FT-IR, TENSER 27, Bruker) and tested in parallel with quinoa polysaccharide (QS) and Chitosan (CS) alone as controls. Wherein, the infrared spectrogram of the quinoa polysaccharide-chitosan composite aerogel (QS-CS) provided in example 6 is shown in fig. 2, and as can be seen from fig. 2, the infrared spectrogram of the quinoa polysaccharide-chitosan composite aerogel has the structural characteristics of both chitosan and quinoa polysaccharide, indicating that the composite aerogel is successfully crosslinked.
(3) Thermogravimetric analysis
Performing thermogravimetric analysis on the quinoa polysaccharide-chitosan composite aerogel by adopting a thermogravimetric analyzer (TG-DTA 6300, Japan), wherein the test environment is a nitrogen atmosphere, and the temperature is increased from 50 ℃ to 1000 ℃ at the speed of 10 ℃/min to obtain the thermogravimetric analysis result of the sample to be tested. Wherein, the thermal analysis curve graph of the quinoa polysaccharide-chitosan composite aerogel provided in example 6 is shown in fig. 3: according to the TG curve, the weight loss is 6 percent in the range of 50-200 ℃, and 46 percent in the range of 200-500 ℃; the DTG curve shows that the temperature of 200-500 ℃ is the fastest weight loss temperature range of the composite aerogel; when the temperature is 310 ℃, the mass loss rate of the composite aerogel is maximum, and is-4.11%/min.
(4) Mechanical Strength test
Placing weights with different masses on the quinoa polysaccharide-chitosan composite aerogel to test the mechanical strength of the quinoa polysaccharide-chitosan composite aerogel; exemplarily, a mechanical strength test chart of the quinoa polysaccharide-chitosan composite aerogel provided in example 6 is shown in fig. 4, wherein, (a) a weight of 5g, (b) a weight of 10g, (c) a weight of 20g, and (d) a weight of 100 g; therefore, the quinoa polysaccharide-chitosan composite aerogel can bear 100g of weight and has good mechanical strength.
Application example 1
The application of the quinoa polysaccharide-chitosan composite aerogel as an adsorbent in treating dye wastewater comprises the following specific steps:
A. weighing 5mg of the quinoa polysaccharide-chitosan composite aerogel provided in the embodiment 6, adding 20mL of 200mg/L Congo Red (CR) solution, and standing and adsorbing for 2h at room temperature; filtering to remove the composite aerogel material, and measuring the adsorption performance of the quinoa polysaccharide-chitosan composite aerogel on a Congo red solution by using a spectrophotometer (UNICO, 2802);
B. weighing 5mg of the quinoa polysaccharide-chitosan composite aerogel provided in the embodiment 6, adding 20mL of 200mg/L Methylene Blue (MB) solution, and standing and adsorbing at room temperature for 2 h; filtering to remove the composite aerogel material, and measuring the adsorption performance of the quinoa polysaccharide-chitosan composite aerogel on a methylene blue solution by using a spectrophotometer.
The influence of different mass ratios of quinoa polysaccharide and chitosan (examples 6-11, comparative example 1) on the dye adsorption performance of the composite aerogel is studied by the same method, and the obtained result graph is shown in fig. 5, as shown in fig. 5, it can be known from fig. 5 that, with the increase of the quinoa polysaccharide content, the adsorption performance of the quinoa polysaccharide-chitosan composite aerogel on Congo Red (CR) and Methylene Blue (MB) is gradually enhanced, and when the mass ratio of quinoa polysaccharide to chitosan is 1:1, the saturated adsorption amount of the quinoa polysaccharide-chitosan composite aerogel on congo red is 342.5mg/g, and the saturated adsorption amount on methylene blue is 17.96 mg/g.
The influence of different crosslinking temperatures (examples 6 and 12-15) on the dye adsorption performance of the quinoa polysaccharide-chitosan composite aerogel is researched by the same method, and the obtained result graph is shown in fig. 6, and it can be known from fig. 6 that different crosslinking temperatures have certain influence on the adsorption of the composite aerogel to congo red and methylene blue; with the increase of the crosslinking temperature, the adsorption performance of the composite aerogel on Congo red and methylene blue is gradually enhanced, when the temperature is 175 ℃ (example 6), the adsorption capacity of the composite on Congo red is 304.5mg/g, and the saturated adsorption capacity on methylene blue is 18.08mg/g, and the adsorption performance of the composite aerogel on dyes gradually tends to be gentle when the crosslinking temperature is continuously increased.
The influence of different adsorption times on the dye adsorption performance of the quinoa polysaccharide-chitosan composite aerogel (example 6) is researched by adopting the same method, and the obtained result graph is shown in fig. 7, as can be seen from fig. 7, different adsorption times have certain influence on the adsorption of the composite aerogel to congo red and methylene blue, the adsorption performance of the composite aerogel to congo red and methylene blue is gradually enhanced along with the gradual increase of the adsorption time, and the adsorption performance gradually tends to be gentle after the adsorption time reaches 8 hours; at this time, the adsorption capacity of the quinoa polysaccharide-chitosan composite aerogel on congo red is 310.38mg/g, and the adsorption capacity on methylene blue is 18.08 mg/g.
The same method is adopted to study the influence of different adsorption temperatures on the dye adsorption performance of the quinoa polysaccharide-chitosan composite aerogel (example 6), and the obtained result graph is shown in fig. 8, it can be known from fig. 8 that different adsorption temperatures have certain influence on the adsorption of the composite aerogel to congo red and methylene blue, when the adsorption temperature is 30 ℃, the adsorption effect of the composite aerogel to the dye is the best, at this time, the adsorption amount of the quinoa polysaccharide-chitosan composite aerogel to congo red is 211.63mg/g, and the adsorption amount of the quinoa polysaccharide-chitosan composite aerogel to methylene blue is 10.65 mg/g.
The same method is adopted to study the influence of different adsorption pH values on the dye adsorption performance of the quinoa polysaccharide-chitosan composite aerogel (example 6), and the obtained result graph is shown in fig. 9, and it can be known from fig. 9 that different pH values have certain influence on the adsorption of the composite aerogel to congo red and methylene blue; when the pH is about 6.0, the adsorption effect of the composite aerogel on Congo red is the best, and at the moment, the adsorption amount of the quinoa polysaccharide-chitosan composite aerogel on Congo red is 322 mg/g; when the pH value is 12.0, the adsorption effect of the composite aerogel on methylene blue is the best, and at the moment, the adsorption amount of the quinoa polysaccharide-chitosan composite aerogel on the methylene blue is 17.80 mg/g.
The same method is adopted to research the influence of different quinoa polysaccharide-chitosan composite aerogel dosages on the Congo red adsorption performance, and the obtained result graph is shown in figure 10, wherein (a) is 1mg, (b) is 5mg, and (c) is 10 mg; therefore, with the continuous increase of the using amount of the composite aerogel, the color of the congo red solution gradually becomes light, and when the using amount of the quinoa polysaccharide-chitosan composite aerogel is 10mg, the color of the solution is almost clear, and the adsorption effect is close to 100%.
The influence of different quinoa polysaccharide-chitosan composite aerogels on methylene blue adsorption performance is researched by adopting the same method, and the obtained result graph is shown in fig. 11, wherein (a) is 1mg, (b) is 5mg, and (c) is 10 mg; therefore, with the continuous increase of the using amount of the composite aerogel, the color of the methylene blue solution gradually becomes light, and when the using amount of the quinoa polysaccharide-chitosan composite aerogel is 10mg, the solution is almost clear in color, and the adsorption effect is close to 100%.
Application example 2
Quinoa polysaccharide-chitosan composite aerogel as adsorbent for treating arsenide (Na)2HAsO4) The application of the waste water comprises the following specific steps:
5mg of quinoa polysaccharide-chitosan composite aerogel (example 6) was weighed and added with 20mL of 500. mu.g/L Na2HAsO4Standing the solution at room temperature for adsorbing for 2h, filtering to remove gasRemoving the gel material, and determining the adsorption performance of the quinoa polysaccharide-chitosan composite aerogel on As (V) by an atomic fluorescence liquid phase combination instrument.
Application example 3
The quinoa polysaccharide-chitosan composite aerogel is applied to the adsorption of natural organic matters (polyphenol, flavone and saponin) as an adsorbent, and specifically comprises the following components:
A. drawing an oleanolic acid standard curve: 0mL of oleanolic acid standard solution (80 mug/mL, methanol is used as solvent) 0, 0.2, 0.4, 0.6, 0.8, 1.0 and 1.2mL are respectively put into a 10mL test tube to be used as a liquid to be tested, and 3 of the test tubes are parallel. Volatilizing the solution to be detected in a 70 ℃ water bath, sequentially adding 0.2mL of 5% vanillin-glacial acetic acid solution and 0.8mL of perchloric acid, plugging and shaking the test tube, heating the test tube in a 60 ℃ water bath for 15min, cooling ice water for 5min after color development, adding 5mL glacial acetic acid for dilution and shaking, standing for 30min, measuring the light absorption value at 546nm, and replacing the solution to be detected with methanol with the same amount to serve as a reagent blank; drawing a standard curve by taking the absorbance (A) as a vertical coordinate and taking the oleanolic acid concentration as a horizontal coordinate;
weighing 10mg of the quinoa polysaccharide-chitosan composite aerogel provided in the embodiment 6, adding 10mL of 18mg/L quinoa saponin solution, and standing and adsorbing at room temperature for 12 h; respectively sucking 1mL of saponin solution before and after adsorption, and determining the total saponin content in the solution before and after adsorption according to an oleanolic acid standard curve method to obtain the adsorption performance of the quinoa polysaccharide-chitosan composite aerogel on saponin.
B. Drawing a rutin standard curve: respectively putting 0.00, 0.20, 0.40, 0.60, 0.80 and 1.00mL of 0.98mg/mL rutin standard solution into a 6-count 10-mL colorimetric tube with a plug, adding 3mL of 60% ethanol, adding 1mL of 5% sodium nitrite solution, shaking up, standing for 6min, adding 1mL of 10% aluminum nitrate solution, shaking up, standing for 6min, fixing the volume to 10mL by using 1mol/L sodium hydroxide solution, shaking up, standing for 15min, and measuring the light absorption value at 510 nm;
weighing 10mg of the quinoa polysaccharide-chitosan composite aerogel provided in the embodiment 6, adding 10mL of 18mg/L flavone solution, and standing and adsorbing at room temperature for 12 h; respectively absorbing 1.0mL of the flavone solution before and after adsorption, and determining the content of total flavone in the solution before and after adsorption according to a rutin standard curve method to obtain the adsorption performance of the quinoa polysaccharide-chitosan composite aerogel on the flavone.
C. Drawing a gallic acid standard curve: adding 0.2mg/mL gallic acid solution 0, 0.05, 0.1, 0.2, 0.3, 0.4mL into 6 test tubes, adding distilled water to 4.0mL, adding 0.25mol/L Folin phenol 1.0mL, mixing, standing for 3min, adding 15% Na 1mL2CO3Mixing the solution, standing for 1h, and measuring absorbance at 760 nm;
weighing 10mg of the quinoa polysaccharide-chitosan composite aerogel provided in the embodiment 6, adding 10mL of 18mg/L quinoa polyphenol solution, and standing and adsorbing at room temperature for 12 h; respectively absorbing 1.0mL of sample solution before and after adsorption, and determining the polyphenol content in the solution before and after adsorption according to a gallic acid standard curve method to obtain the adsorption performance of the quinoa polysaccharide-chitosan composite aerogel on polyphenol.
The adsorption performance of the quinoa polysaccharide-chitosan composite aerogel on natural organic matters (polyphenol, flavone and saponin) is researched according to the method:
the influence of different dosages of the quinoa polysaccharide-chitosan composite aerogel on the performance of adsorbing natural organic matters is researched, and an obtained result graph is shown in fig. 12, and it can be known from fig. 12 that the adsorption quantity of the composite aerogel on the saponin, the flavone and the polyphenol does not change greatly along with the increasing of the dosages (the dosages) of the quinoa polysaccharide-chitosan composite aerogel; when the dosage of the quinoa polysaccharide-chitosan composite aerogel is 40mg, the adsorption capacity of the quinoa polysaccharide-chitosan composite aerogel on saponin, flavone and polyphenol is 4.96mg/g, 2.37mg/g and 1.46mg/g respectively.
The influence of different initial concentrations on the performance of the quinoa polysaccharide-chitosan composite aerogel (example 6) for adsorbing natural organic matters is researched, and the obtained result graph is shown in fig. 13, and as can be seen from fig. 13, the adsorption amount of the composite aerogel on the quinoa polysaccharide-chitosan composite aerogel is gradually increased along with the continuous increase of the initial concentrations of quinoa saponin, flavone and polyphenol; when the concentrations of the quinoa saponin, the flavone and the polyphenol are 30mg/L, the adsorption amounts of the quinoa polysaccharide-chitosan composite aerogel on the quinoa saponin, the flavone and the polyphenol are respectively 13.77mg/g, 3.32mg/g and 4.93 mg/g.
The influence of different adsorption temperatures on the natural organic matter adsorption performance of the quinoa polysaccharide-chitosan composite aerogel (example 6) is studied, and the obtained result graph is shown in fig. 14, and it can be seen from fig. 14 that for saponin, the adsorption amount of the composite aerogel to quinoa saponin is gradually reduced along with the continuous increase of the temperature, and the adsorption amount is maximum at the temperature of 20 ℃, at this time, the adsorption amount of the quinoa polysaccharide-chitosan composite aerogel to saponin is 5.12 mg/g. For flavone, with the continuous rise of temperature, the adsorption capacity of the composite aerogel on the quinoa flavone is increased and then decreased, when the temperature is 30 ℃, the adsorption capacity is maximum, and at the moment, the adsorption capacity of the quinoa polysaccharide-chitosan composite aerogel on the quinoa flavone is 2.14 mg/g. For polyphenol, the adsorption capacity of the composite aerogel to the quinoa polyphenol is gradually increased along with the continuous rise of the temperature, the adsorption capacity is the maximum when the temperature is 60 ℃, and at the moment, the adsorption capacity of the quinoa polysaccharide-chitosan composite aerogel to the quinoa polyphenol is 1.07 mg/g.
The effect of different adsorption times on the performance of the quinoa polysaccharide-chitosan composite aerogel (example 6) for adsorbing natural organic matters is studied, and the obtained result graph is shown in fig. 15, and it can be seen from fig. 15 that the adsorption amount of the composite aerogel on the quinoa polysaccharide-chitosan composite aerogel is increased and then decreased with the increase of the adsorption time. When the adsorption time is 1h, the adsorption capacity of the quinoa polysaccharide-chitosan composite aerogel on the quinoa polysaccharide-chitosan composite aerogel reaches the maximum value, and the adsorption capacity is respectively 7.08mg/g, 2.85mg/g and 0.79 mg/g.
The pH value of the solution is one of the determining factors influencing the surface charges of the adsorbent and the adsorbate, the influence of different adsorption pH values on the performance of the quinoa polysaccharide-chitosan composite aerogel (example 6) for adsorbing natural organic matters is studied, and the obtained result graph is shown in fig. 16, and as can be seen from fig. 16, different pH values have certain influence on the adsorption of quinoa saponin, flavone and polyphenol by the composite aerogel; when the pH value is about 4.0, the adsorption capacity of the composite aerogel on the quinoa saponin and the flavone is optimal, and at the moment, the adsorption amounts of the quinoa polysaccharide-chitosan composite aerogel on the saponin and the flavone are respectively 8.42mg/g and 5.04 mg/; when the pH value is about 5.0, the adsorption capacity of the composite aerogel on the quinoa polyphenol is optimal, and at the moment, the adsorption quantity of the quinoa polysaccharide-chitosan composite aerogel on the quinoa polyphenol is 0.86 mg/g.
The applicant states that the present invention is illustrated by the above examples, but the present invention is not limited to the above process steps, i.e. the present invention is not meant to be dependent on the above process steps to be carried out. It will be apparent to those skilled in the art that any modification of the present invention, equivalent substitutions of selected materials and additions of auxiliary components, selection of specific modes and the like, which are within the scope and disclosure of the present invention, are contemplated by the present invention.
Claims (10)
1. The quinoa polysaccharide-chitosan composite aerogel is characterized by being obtained by cross-linking quinoa polysaccharide and chitosan; the quinoa polysaccharide-chitosan composite aerogel has a three-dimensional network structure.
2. The quinoa polysaccharide-chitosan composite aerogel according to claim 1, wherein the pore size of the quinoa polysaccharide-chitosan composite aerogel is 20-150 μm;
preferably, the specific surface area of the quinoa polysaccharide-chitosan composite aerogel is 10-100 m2/g；
Preferably, the quinoa polysaccharide accounts for 5-50% of the total mass of the quinoa polysaccharide and the chitosan, wherein the sum of the quinoa polysaccharide and the chitosan accounts for 100%.
3. The quinoa polysaccharide-chitosan composite aerogel according to claim 1 or 2, wherein the molecular weight of said quinoa polysaccharide is 10000-20000 Da;
preferably, the quinoa polysaccharide is extracted by the following method, and the method comprises the following steps: mixing quinoa seeds with water, and extracting by a water extraction and alcohol precipitation method to obtain the quinoa polysaccharide;
preferably, the feed-liquid ratio of the quinoa seeds to water is 1 (10-30);
preferably, the alcohol in the water extraction and alcohol precipitation method is ethanol;
preferably, after ethanol is added in the water extraction and alcohol precipitation method, the volume percentage content of the ethanol in the system is 50-80%;
preferably, the molecular weight of the chitosan is 500000-2000000 Da;
preferably, the deacetylation degree of the chitosan is 75-95%.
4. The preparation method of the quinoa polysaccharide-chitosan composite aerogel as claimed in any one of claims 1 to 3, wherein the preparation method comprises the following steps:
(1) mixing quinoa polysaccharide, chitosan and a solvent to obtain a mixed solution;
(2) freeze-drying the mixed solution obtained in the step (1) to obtain a freeze-dried product;
(3) and (3) crosslinking the freeze-dried product obtained in the step (2) to obtain the quinoa polysaccharide-chitosan composite aerogel.
5. The preparation method according to claim 4, wherein the mass ratio of the quinoa polysaccharide to the chitosan in the step (1) is 1 (1-19);
preferably, the sum of the concentrations of quinoa polysaccharide and chitosan in the mixed solution in the step (1) is 10-50 mg/mL;
preferably, the solvent in step (1) is an aqueous solution containing an acidic substance;
preferably, the acidic substance is an organic acid and/or an inorganic acid;
preferably, the acidic substance comprises any one of hydrochloric acid, acetic acid or lactic acid or a combination of at least two of the two;
preferably, the mass percentage of the acidic substance in the solvent is 0.5-5%;
preferably, the mixed solution in the step (1) further comprises a cross-linking agent;
preferably, the cross-linking agent comprises glutaraldehyde;
preferably, the mass of the cross-linking agent is 0.01-2%, and more preferably 0.1-0.5%, based on 100% of the sum of the masses of the quinoa polysaccharide and the chitosan.
6. The method according to claim 4 or 5, wherein the freeze-drying of step (2) is carried out at a freezing temperature of-20 to-80 ℃;
preferably, the freeze drying time in the step (2) is 24-48 h;
preferably, the temperature of the crosslinking in the step (3) is 100-200 ℃;
preferably, the crosslinking time in the step (3) is 10-60 min.
7. The preparation method according to any one of claims 4 to 6, characterized by specifically comprising the steps of:
(1) mixing quinoa polysaccharide, chitosan, a cross-linking agent and a solvent to obtain a mixed solution; the mass ratio of the quinoa polysaccharide to the chitosan is 1 (1-19), and the sum of the concentrations of the quinoa polysaccharide and the chitosan in the mixed solution is 10-50 mg/mL; the solvent is an aqueous solution containing acidic substances, and the mass percentage of the acidic substances is 0.5-5%;
(2) freeze-drying the mixed solution obtained in the step (1) for 24-48 h to obtain a freeze-dried product;
(3) and (3) crosslinking the freeze-dried product obtained in the step (2) at 100-200 ℃ for 10-60 min to obtain the quinoa polysaccharide-chitosan composite aerogel.
8. A composite adsorbent, which comprises the quinoa polysaccharide-chitosan composite aerogel according to any one of claims 1 to 3.
9. Use of the quinoa polysaccharide-chitosan composite aerogel according to any one of claims 1 to 3 in water treatment;
preferably, the quinoa polysaccharide-chitosan composite aerogel is used as an adsorbent in water treatment.
10. The use of claim 9, wherein the quinoa polysaccharide-chitosan composite aerogel is used as an adsorbent in water treatment to adsorb any one or a combination of at least two of heavy metal ions, arsenide or organic matter;
preferably, the organic matter comprises synthetic organic dye and/or natural organic matter;
preferably, the natural organic substance comprises any one of or a combination of at least two of alkaloids, saponins, polyphenols or flavonoids.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110482103 | 2021-04-30 | ||
| CN2021104821036 | 2021-04-30 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113578284A true CN113578284A (en) | 2021-11-02 |
Family
ID=78254163
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110884410.7A Pending CN113578284A (en) | 2021-04-30 | 2021-08-03 | Quinoa polysaccharide-chitosan composite aerogel and preparation method and application thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113578284A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115591529A (en) * | 2022-10-24 | 2023-01-13 | 陈冀锐（Cn） | Preparation method of high-adsorbability chitosan/bamboo activated carbon composite aerogel |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103769057A (en) * | 2012-10-25 | 2014-05-07 | 中国科学院过程工程研究所 | High-strength polysaccharide aerogel microsphere, and preparation method and application thereof |
| CN104437395A (en) * | 2014-11-03 | 2015-03-25 | 中国科学院过程工程研究所 | Acid-resistant magnetic chitosan microspheres as well as preparation method and application thereof |
| CN108421534A (en) * | 2018-02-08 | 2018-08-21 | 中山大学 | A kind of chitosan gel rubber material and preparation method thereof, wastewater treatment method and application |
| CN110038529A (en) * | 2019-04-25 | 2019-07-23 | 广西科技大学 | A kind of preparation method of three-dimensional fiber base composite aerogel type adsorbent |
| CN111359589A (en) * | 2020-03-22 | 2020-07-03 | 华南理工大学 | Chitosan/bacterial cellulose composite aerogel adsorbent and preparation method and application thereof |
| CN112473630A (en) * | 2020-11-13 | 2021-03-12 | 山东东岳化工有限公司 | Composite graphene chitosan aerogel and preparation method and application thereof |
-
2021
- 2021-08-03 CN CN202110884410.7A patent/CN113578284A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103769057A (en) * | 2012-10-25 | 2014-05-07 | 中国科学院过程工程研究所 | High-strength polysaccharide aerogel microsphere, and preparation method and application thereof |
| CN104437395A (en) * | 2014-11-03 | 2015-03-25 | 中国科学院过程工程研究所 | Acid-resistant magnetic chitosan microspheres as well as preparation method and application thereof |
| CN108421534A (en) * | 2018-02-08 | 2018-08-21 | 中山大学 | A kind of chitosan gel rubber material and preparation method thereof, wastewater treatment method and application |
| CN110038529A (en) * | 2019-04-25 | 2019-07-23 | 广西科技大学 | A kind of preparation method of three-dimensional fiber base composite aerogel type adsorbent |
| CN111359589A (en) * | 2020-03-22 | 2020-07-03 | 华南理工大学 | Chitosan/bacterial cellulose composite aerogel adsorbent and preparation method and application thereof |
| CN112473630A (en) * | 2020-11-13 | 2021-03-12 | 山东东岳化工有限公司 | Composite graphene chitosan aerogel and preparation method and application thereof |
Non-Patent Citations (5)
| Title |
|---|
| MINGHUI TAN ET AL.: "Rational design and synthesis of chitosan-quinoa polysaccharide composite aerogel and its adsorption properties for Congo red and methylene blue", 《ROYAL SOCIETY OF CHEMISTRY》 * |
| 应国清等: "壳聚糖吸附剂的制备及性能", 《化工进展》 * |
| 詹益兴等: "《精细化工新产品》", 30 June 2009, 科学技术文献出版社 * |
| 韩丽: "《实用中药制剂新技术》", 30 November 2002, 北京：化学工业出版社 * |
| 麻芳等: "生物吸附材料吸附水中砷的研究进展", 《离子交换与吸附》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115591529A (en) * | 2022-10-24 | 2023-01-13 | 陈冀锐（Cn） | Preparation method of high-adsorbability chitosan/bamboo activated carbon composite aerogel |
| CN115591529B (en) * | 2022-10-24 | 2023-10-13 | 陈冀锐 | Preparation method of high-adsorptivity chitosan/bamboo activated carbon composite aerogel |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Fan et al. | A novel electrospun β-CD/CS/PVA nanofiber membrane for simultaneous and rapid removal of organic micropollutants and heavy metal ions from water | |
| Pei et al. | Tannin-immobilized cellulose hydrogel fabricated by a homogeneous reaction as a potential adsorbent for removing cationic organic dye from aqueous solution | |
| CN101884909A (en) | Method for preparing konjac glucomannan adsorbing material | |
| CN104389234A (en) | Cigarette filter tip added with chitosan-graphene oxide composite material | |
| CN113578284A (en) | Quinoa polysaccharide-chitosan composite aerogel and preparation method and application thereof | |
| CN105344322A (en) | Method for preparing biological activated carbon from waste maidenhair tree leaves and folium ginkgo herb residue | |
| Shi et al. | Sustainable and superhydrophobic spent coffee ground-derived holocellulose nanofibers foam for continuous oil/water separation | |
| CN104001480A (en) | Preparation method for spherical water treatment agent | |
| CN115055170A (en) | Wood-based modified nano-cellulose water purification material with high adsorption performance and preparation method and application thereof | |
| Peng et al. | A bowl-shaped biosorbent derived from sugarcane bagasse lignin for cadmium ion adsorption | |
| CN110142030B (en) | Preparation method of efficient formaldehyde adsorption material based on activated carbon | |
| Yang et al. | Cellulose derived biochar: Preparation, characterization and Benzo [a] pyrene adsorption capacity | |
| CN103772707A (en) | Modified ordered mesoporous organosilicon material, preparation method and application thereof | |
| CN110980732A (en) | Preparation method of kiwi pruning branch-based activated carbon | |
| CN110964211A (en) | Star-shaped lignin-based benzophenone and preparation method and application thereof | |
| AU2020103503A4 (en) | Boric acid adsorbent material and preparation method | |
| CN108727639B (en) | Preparation method and application of bacterial cellulose/aramid nanofiber composite aerogel | |
| CN107202724B (en) | Sample pretreatment method for detecting preservative in fruit juice | |
| Zhao et al. | Dyeing properties of acetylated wood with red disperse dyes | |
| CN107955077B (en) | Method for preparing cationic cellulose ether flocculant based on cigarette butt modification | |
| Zhang et al. | Synthesis of molecularly imprinted polymer based on cooperative imprinting for enrichment of gallic acid in Puer tea | |
| Qiao et al. | Rigid crosslink improves the surface area and porosity of β-cyclodextrin beads for enhanced adsorption of flavonoids | |
| CN112023897B (en) | Preparation method of nanocellulose microspheres with selective adsorption and adsorption application of nanocellulose microspheres to dye wastewater | |
| CN111116943B (en) | Composite cellulose nanofibril hydrogel sphere and preparation method and application thereof | |
| CN112588269A (en) | Lignin-based nano adsorbent and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20211102 |
|
| RJ01 | Rejection of invention patent application after publication |