CN112252022A - Preparation method of super-hydrophilic PPS composite fiber membrane - Google Patents
Preparation method of super-hydrophilic PPS composite fiber membrane Download PDFInfo
- Publication number
- CN112252022A CN112252022A CN202011151300.1A CN202011151300A CN112252022A CN 112252022 A CN112252022 A CN 112252022A CN 202011151300 A CN202011151300 A CN 202011151300A CN 112252022 A CN112252022 A CN 112252022A
- Authority
- CN
- China
- Prior art keywords
- pps
- hydrophilic
- woven fabric
- acid
- fiber membrane
- 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.)
- Granted
Links
- 239000012528 membrane Substances 0.000 title claims abstract description 75
- 239000000835 fiber Substances 0.000 title claims abstract description 52
- 239000002131 composite material Substances 0.000 title claims abstract description 42
- 238000002360 preparation method Methods 0.000 title claims abstract description 11
- 239000004745 nonwoven fabric Substances 0.000 claims abstract description 74
- 239000001913 cellulose Substances 0.000 claims abstract description 19
- 229920002678 cellulose Polymers 0.000 claims abstract description 19
- 238000006243 chemical reaction Methods 0.000 claims abstract description 18
- 238000007731 hot pressing Methods 0.000 claims abstract description 17
- 239000011248 coating agent Substances 0.000 claims abstract description 16
- 238000000576 coating method Methods 0.000 claims abstract description 16
- 238000000034 method Methods 0.000 claims abstract description 16
- 239000002105 nanoparticle Substances 0.000 claims abstract description 14
- 239000002253 acid Substances 0.000 claims abstract description 13
- 230000001590 oxidative effect Effects 0.000 claims abstract description 11
- 239000000243 solution Substances 0.000 claims description 35
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 35
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 18
- 239000008367 deionised water Substances 0.000 claims description 18
- 229910021641 deionized water Inorganic materials 0.000 claims description 18
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 16
- 239000006087 Silane Coupling Agent Substances 0.000 claims description 16
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 claims description 14
- 238000005406 washing Methods 0.000 claims description 13
- 238000010438 heat treatment Methods 0.000 claims description 10
- 239000000725 suspension Substances 0.000 claims description 10
- 230000007935 neutral effect Effects 0.000 claims description 9
- 229910017604 nitric acid Inorganic materials 0.000 claims description 9
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 8
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 claims description 8
- -1 polyoxyethylene Polymers 0.000 claims description 8
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 claims description 6
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims description 6
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims description 6
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 claims description 6
- 238000009835 boiling Methods 0.000 claims description 6
- 239000002041 carbon nanotube Substances 0.000 claims description 6
- 229910021393 carbon nanotube Inorganic materials 0.000 claims description 6
- 238000004140 cleaning Methods 0.000 claims description 6
- GVGUFUZHNYFZLC-UHFFFAOYSA-N dodecyl benzenesulfonate;sodium Chemical compound [Na].CCCCCCCCCCCCOS(=O)(=O)C1=CC=CC=C1 GVGUFUZHNYFZLC-UHFFFAOYSA-N 0.000 claims description 6
- 238000002156 mixing Methods 0.000 claims description 6
- 229940080264 sodium dodecylbenzenesulfonate Drugs 0.000 claims description 6
- BPSIOYPQMFLKFR-UHFFFAOYSA-N trimethoxy-[3-(oxiran-2-ylmethoxy)propyl]silane Chemical compound CO[Si](OC)(OC)CCCOCC1CO1 BPSIOYPQMFLKFR-UHFFFAOYSA-N 0.000 claims description 6
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 5
- AEMRFAOFKBGASW-UHFFFAOYSA-N Glycolic acid Chemical compound OCC(O)=O AEMRFAOFKBGASW-UHFFFAOYSA-N 0.000 claims description 4
- LCTONWCANYUPML-UHFFFAOYSA-N Pyruvic acid Chemical compound CC(=O)C(O)=O LCTONWCANYUPML-UHFFFAOYSA-N 0.000 claims description 4
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 4
- 239000012670 alkaline solution Substances 0.000 claims description 4
- JVTAAEKCZFNVCJ-UHFFFAOYSA-N lactic acid Chemical compound CC(O)C(O)=O JVTAAEKCZFNVCJ-UHFFFAOYSA-N 0.000 claims description 4
- 230000004048 modification Effects 0.000 claims description 4
- 238000012986 modification Methods 0.000 claims description 4
- 239000003607 modifier Substances 0.000 claims description 4
- VLTRZXGMWDSKGL-UHFFFAOYSA-N perchloric acid Chemical compound OCl(=O)(=O)=O VLTRZXGMWDSKGL-UHFFFAOYSA-N 0.000 claims description 4
- CPRMKOQKXYSDML-UHFFFAOYSA-M rubidium hydroxide Chemical compound [OH-].[Rb+] CPRMKOQKXYSDML-UHFFFAOYSA-M 0.000 claims description 4
- WYTZZXDRDKSJID-UHFFFAOYSA-N (3-aminopropyl)triethoxysilane Chemical compound CCO[Si](OCC)(OCC)CCCN WYTZZXDRDKSJID-UHFFFAOYSA-N 0.000 claims description 2
- WRIDQFICGBMAFQ-UHFFFAOYSA-N (E)-8-Octadecenoic acid Natural products CCCCCCCCCC=CCCCCCCC(O)=O WRIDQFICGBMAFQ-UHFFFAOYSA-N 0.000 claims description 2
- MFGOFGRYDNHJTA-UHFFFAOYSA-N 2-amino-1-(2-fluorophenyl)ethanol Chemical compound NCC(O)C1=CC=CC=C1F MFGOFGRYDNHJTA-UHFFFAOYSA-N 0.000 claims description 2
- LQJBNNIYVWPHFW-UHFFFAOYSA-N 20:1omega9c fatty acid Natural products CCCCCCCCCCC=CCCCCCCCC(O)=O LQJBNNIYVWPHFW-UHFFFAOYSA-N 0.000 claims description 2
- OXYZDRAJMHGSMW-UHFFFAOYSA-N 3-chloropropyl(trimethoxy)silane Chemical compound CO[Si](OC)(OC)CCCCl OXYZDRAJMHGSMW-UHFFFAOYSA-N 0.000 claims description 2
- ZFBOVYJITDWWBB-UHFFFAOYSA-N 3-triethoxysilylpropane-1,1,1-triamine Chemical compound CCO[Si](OCC)(OCC)CCC(N)(N)N ZFBOVYJITDWWBB-UHFFFAOYSA-N 0.000 claims description 2
- SJECZPVISLOESU-UHFFFAOYSA-N 3-trimethoxysilylpropan-1-amine Chemical compound CO[Si](OC)(OC)CCCN SJECZPVISLOESU-UHFFFAOYSA-N 0.000 claims description 2
- UUEWCQRISZBELL-UHFFFAOYSA-N 3-trimethoxysilylpropane-1-thiol Chemical compound CO[Si](OC)(OC)CCCS UUEWCQRISZBELL-UHFFFAOYSA-N 0.000 claims description 2
- QSBYPNXLFMSGKH-UHFFFAOYSA-N 9-Heptadecensaeure Natural products CCCCCCCC=CCCCCCCCC(O)=O QSBYPNXLFMSGKH-UHFFFAOYSA-N 0.000 claims description 2
- 239000005995 Aluminium silicate Substances 0.000 claims description 2
- XMWRBQBLMFGWIX-UHFFFAOYSA-N C60 fullerene Chemical compound C12=C3C(C4=C56)=C7C8=C5C5=C9C%10=C6C6=C4C1=C1C4=C6C6=C%10C%10=C9C9=C%11C5=C8C5=C8C7=C3C3=C7C2=C1C1=C2C4=C6C4=C%10C6=C9C9=C%11C5=C5C8=C3C3=C7C1=C1C2=C4C6=C2C9=C5C3=C12 XMWRBQBLMFGWIX-UHFFFAOYSA-N 0.000 claims description 2
- 229910021503 Cobalt(II) hydroxide Inorganic materials 0.000 claims description 2
- IOVCWXUNBOPUCH-UHFFFAOYSA-N Nitrous acid Chemical compound ON=O IOVCWXUNBOPUCH-UHFFFAOYSA-N 0.000 claims description 2
- 239000005642 Oleic acid Substances 0.000 claims description 2
- ZQPPMHVWECSIRJ-UHFFFAOYSA-N Oleic acid Natural products CCCCCCCCC=CCCCCCCCC(O)=O ZQPPMHVWECSIRJ-UHFFFAOYSA-N 0.000 claims description 2
- 229920003171 Poly (ethylene oxide) Polymers 0.000 claims description 2
- 239000004698 Polyethylene Substances 0.000 claims description 2
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 claims description 2
- 235000012211 aluminium silicate Nutrition 0.000 claims description 2
- 239000007864 aqueous solution Substances 0.000 claims description 2
- RQPZNWPYLFFXCP-UHFFFAOYSA-L barium dihydroxide Chemical compound [OH-].[OH-].[Ba+2] RQPZNWPYLFFXCP-UHFFFAOYSA-L 0.000 claims description 2
- 229910001863 barium hydroxide Inorganic materials 0.000 claims description 2
- HUCVOHYBFXVBRW-UHFFFAOYSA-M caesium hydroxide Inorganic materials [OH-].[Cs+] HUCVOHYBFXVBRW-UHFFFAOYSA-M 0.000 claims description 2
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 claims description 2
- XTEGARKTQYYJKE-UHFFFAOYSA-N chloric acid Chemical compound OCl(=O)=O XTEGARKTQYYJKE-UHFFFAOYSA-N 0.000 claims description 2
- 229940005991 chloric acid Drugs 0.000 claims description 2
- QBWCMBCROVPCKQ-UHFFFAOYSA-N chlorous acid Chemical compound OCl=O QBWCMBCROVPCKQ-UHFFFAOYSA-N 0.000 claims description 2
- 229940077239 chlorous acid Drugs 0.000 claims description 2
- ASKVAEGIVYSGNY-UHFFFAOYSA-L cobalt(ii) hydroxide Chemical compound [OH-].[OH-].[Co+2] ASKVAEGIVYSGNY-UHFFFAOYSA-L 0.000 claims description 2
- LDHQCZJRKDOVOX-NSCUHMNNSA-N crotonic acid Chemical compound C\C=C\C(O)=O LDHQCZJRKDOVOX-NSCUHMNNSA-N 0.000 claims description 2
- GUJOJGAPFQRJSV-UHFFFAOYSA-N dialuminum;dioxosilane;oxygen(2-);hydrate Chemical compound O.[O-2].[O-2].[O-2].[Al+3].[Al+3].O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O GUJOJGAPFQRJSV-UHFFFAOYSA-N 0.000 claims description 2
- 150000002191 fatty alcohols Chemical class 0.000 claims description 2
- 229910003472 fullerene Inorganic materials 0.000 claims description 2
- 229910021389 graphene Inorganic materials 0.000 claims description 2
- DLINORNFHVEIFE-UHFFFAOYSA-N hydrogen peroxide;zinc Chemical compound [Zn].OO DLINORNFHVEIFE-UHFFFAOYSA-N 0.000 claims description 2
- QWPPOHNGKGFGJK-UHFFFAOYSA-N hypochlorous acid Chemical compound ClO QWPPOHNGKGFGJK-UHFFFAOYSA-N 0.000 claims description 2
- 239000012535 impurity Substances 0.000 claims description 2
- 235000014413 iron hydroxide Nutrition 0.000 claims description 2
- NCNCGGDMXMBVIA-UHFFFAOYSA-L iron(ii) hydroxide Chemical compound [OH-].[OH-].[Fe+2] NCNCGGDMXMBVIA-UHFFFAOYSA-L 0.000 claims description 2
- QXJSBBXBKPUZAA-UHFFFAOYSA-N isooleic acid Natural products CCCCCCCC=CCCCCCCCCC(O)=O QXJSBBXBKPUZAA-UHFFFAOYSA-N 0.000 claims description 2
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 claims description 2
- 239000004310 lactic acid Substances 0.000 claims description 2
- 235000014655 lactic acid Nutrition 0.000 claims description 2
- VTHJTEIRLNZDEV-UHFFFAOYSA-L magnesium dihydroxide Chemical compound [OH-].[OH-].[Mg+2] VTHJTEIRLNZDEV-UHFFFAOYSA-L 0.000 claims description 2
- 239000000347 magnesium hydroxide Substances 0.000 claims description 2
- 229910001862 magnesium hydroxide Inorganic materials 0.000 claims description 2
- 229910052901 montmorillonite Inorganic materials 0.000 claims description 2
- ZQPPMHVWECSIRJ-KTKRTIGZSA-N oleic acid Chemical compound CCCCCCCC\C=C/CCCCCCCC(O)=O ZQPPMHVWECSIRJ-KTKRTIGZSA-N 0.000 claims description 2
- 235000006408 oxalic acid Nutrition 0.000 claims description 2
- 229920000768 polyamine Polymers 0.000 claims description 2
- 229920000573 polyethylene Polymers 0.000 claims description 2
- 229920001451 polypropylene glycol Polymers 0.000 claims description 2
- 229940107700 pyruvic acid Drugs 0.000 claims description 2
- 239000000377 silicon dioxide Substances 0.000 claims description 2
- 235000012239 silicon dioxide Nutrition 0.000 claims description 2
- 238000002791 soaking Methods 0.000 claims description 2
- UUCCCPNEFXQJEL-UHFFFAOYSA-L strontium dihydroxide Chemical compound [OH-].[OH-].[Sr+2] UUCCCPNEFXQJEL-UHFFFAOYSA-L 0.000 claims description 2
- 229910001866 strontium hydroxide Inorganic materials 0.000 claims description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N sulfuric acid Substances OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 2
- 239000004408 titanium dioxide Substances 0.000 claims description 2
- JCVQKRGIASEUKR-UHFFFAOYSA-N triethoxy(phenyl)silane Chemical compound CCO[Si](OCC)(OCC)C1=CC=CC=C1 JCVQKRGIASEUKR-UHFFFAOYSA-N 0.000 claims description 2
- UGZADUVQMDAIAO-UHFFFAOYSA-L zinc hydroxide Chemical compound [OH-].[OH-].[Zn+2] UGZADUVQMDAIAO-UHFFFAOYSA-L 0.000 claims description 2
- 229910021511 zinc hydroxide Inorganic materials 0.000 claims description 2
- 229940007718 zinc hydroxide Drugs 0.000 claims description 2
- ZDHXKXAHOVTTAH-UHFFFAOYSA-N trichlorosilane Chemical compound Cl[SiH](Cl)Cl ZDHXKXAHOVTTAH-UHFFFAOYSA-N 0.000 claims 1
- 239000005052 trichlorosilane Substances 0.000 claims 1
- 230000004907 flux Effects 0.000 abstract description 9
- 230000002209 hydrophobic effect Effects 0.000 abstract description 5
- 239000011148 porous material Substances 0.000 abstract description 5
- 239000002904 solvent Substances 0.000 abstract description 5
- 239000000126 substance Substances 0.000 abstract description 3
- 239000011159 matrix material Substances 0.000 abstract description 2
- 238000004064 recycling Methods 0.000 abstract description 2
- 239000004734 Polyphenylene sulfide Substances 0.000 description 92
- 229920000069 polyphenylene sulfide Polymers 0.000 description 92
- 238000000926 separation method Methods 0.000 description 13
- 238000001035 drying Methods 0.000 description 11
- 239000000047 product Substances 0.000 description 10
- 239000000463 material Substances 0.000 description 8
- 238000000967 suction filtration Methods 0.000 description 7
- 238000012360 testing method Methods 0.000 description 7
- YMWUJEATGCHHMB-UHFFFAOYSA-N Dichloromethane Chemical compound ClCCl YMWUJEATGCHHMB-UHFFFAOYSA-N 0.000 description 6
- 238000001132 ultrasonic dispersion Methods 0.000 description 5
- 239000002569 water oil cream Substances 0.000 description 4
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical group C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 3
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 3
- 230000009471 action Effects 0.000 description 3
- 238000004132 cross linking Methods 0.000 description 3
- 238000001000 micrograph Methods 0.000 description 3
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- 238000003756 stirring Methods 0.000 description 3
- QPFMBZIOSGYJDE-UHFFFAOYSA-N 1,1,2,2-tetrachloroethane Chemical compound ClC(Cl)C(Cl)Cl QPFMBZIOSGYJDE-UHFFFAOYSA-N 0.000 description 2
- SCYULBFZEHDVBN-UHFFFAOYSA-N 1,1-Dichloroethane Chemical compound CC(Cl)Cl SCYULBFZEHDVBN-UHFFFAOYSA-N 0.000 description 2
- OZAIFHULBGXAKX-UHFFFAOYSA-N 2-(2-cyanopropan-2-yldiazenyl)-2-methylpropanenitrile Chemical compound N#CC(C)(C)N=NC(C)(C)C#N OZAIFHULBGXAKX-UHFFFAOYSA-N 0.000 description 2
- HEDRZPFGACZZDS-UHFFFAOYSA-N Chloroform Chemical compound ClC(Cl)Cl HEDRZPFGACZZDS-UHFFFAOYSA-N 0.000 description 2
- IAZDPXIOMUYVGZ-UHFFFAOYSA-N Dimethylsulphoxide Chemical compound CS(C)=O IAZDPXIOMUYVGZ-UHFFFAOYSA-N 0.000 description 2
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical group OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 description 2
- ROOXNKNUYICQNP-UHFFFAOYSA-N ammonium persulfate Chemical compound [NH4+].[NH4+].[O-]S(=O)(=O)OOS([O-])(=O)=O ROOXNKNUYICQNP-UHFFFAOYSA-N 0.000 description 2
- MVPPADPHJFYWMZ-UHFFFAOYSA-N chlorobenzene Chemical compound ClC1=CC=CC=C1 MVPPADPHJFYWMZ-UHFFFAOYSA-N 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- DCAYPVUWAIABOU-UHFFFAOYSA-N hexadecane Chemical compound CCCCCCCCCCCCCCCC DCAYPVUWAIABOU-UHFFFAOYSA-N 0.000 description 2
- 239000003999 initiator Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- VLKZOEOYAKHREP-UHFFFAOYSA-N n-Hexane Chemical compound CCCCCC VLKZOEOYAKHREP-UHFFFAOYSA-N 0.000 description 2
- 239000003960 organic solvent Substances 0.000 description 2
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- WFUGQJXVXHBTEM-UHFFFAOYSA-N 2-hydroperoxy-2-(2-hydroperoxybutan-2-ylperoxy)butane Chemical compound CCC(C)(OO)OOC(C)(CC)OO WFUGQJXVXHBTEM-UHFFFAOYSA-N 0.000 description 1
- BPSNRTKNZLAHLV-UHFFFAOYSA-N 3-trichlorosilylpropanal Chemical compound Cl[Si](Cl)(Cl)CCC=O BPSNRTKNZLAHLV-UHFFFAOYSA-N 0.000 description 1
- 238000012935 Averaging Methods 0.000 description 1
- 239000004342 Benzoyl peroxide Substances 0.000 description 1
- XDTMQSROBMDMFD-UHFFFAOYSA-N Cyclohexane Chemical compound C1CCCCC1 XDTMQSROBMDMFD-UHFFFAOYSA-N 0.000 description 1
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 description 1
- SECXISVLQFMRJM-UHFFFAOYSA-N N-Methylpyrrolidone Chemical compound CN1CCCC1=O SECXISVLQFMRJM-UHFFFAOYSA-N 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 239000004964 aerogel Substances 0.000 description 1
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- 239000000428 dust Substances 0.000 description 1
- 239000000706 filtrate Substances 0.000 description 1
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- GNOIPBMMFNIUFM-UHFFFAOYSA-N hexamethylphosphoric triamide Chemical compound CN(C)P(=O)(N(C)C)N(C)C GNOIPBMMFNIUFM-UHFFFAOYSA-N 0.000 description 1
- 239000003350 kerosene Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
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- ZQMHJBXHRFJKOT-UHFFFAOYSA-N methyl 2-[(1-methoxy-2-methyl-1-oxopropan-2-yl)diazenyl]-2-methylpropanoate Chemical compound COC(=O)C(C)(C)N=NC(C)(C)C(=O)OC ZQMHJBXHRFJKOT-UHFFFAOYSA-N 0.000 description 1
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- PARWUHTVGZSQPD-UHFFFAOYSA-N phenylsilane Chemical compound [SiH3]C1=CC=CC=C1 PARWUHTVGZSQPD-UHFFFAOYSA-N 0.000 description 1
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- USHAGKDGDHPEEY-UHFFFAOYSA-L potassium persulfate Chemical compound [K+].[K+].[O-]S(=O)(=O)OOS([O-])(=O)=O USHAGKDGDHPEEY-UHFFFAOYSA-L 0.000 description 1
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- D06M11/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising
- D06M11/32—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with oxygen, ozone, ozonides, oxides, hydroxides or percompounds; Salts derived from anions with an amphoteric element-oxygen bond
- D06M11/36—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with oxygen, ozone, ozonides, oxides, hydroxides or percompounds; Salts derived from anions with an amphoteric element-oxygen bond with oxides, hydroxides or mixed oxides; with salts derived from anions with an amphoteric element-oxygen bond
- D06M11/38—Oxides or hydroxides of elements of Groups 1 or 11 of the Periodic Table
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- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M11/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising
- D06M11/51—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with sulfur, selenium, tellurium, polonium or compounds thereof
- D06M11/55—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with sulfur, selenium, tellurium, polonium or compounds thereof with sulfur trioxide; with sulfuric acid or thiosulfuric acid or their salts
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M11/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising
- D06M11/58—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with nitrogen or compounds thereof, e.g. with nitrides
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Abstract
The invention discloses a preparation method of a super-hydrophilic PPS composite fiber membrane. The method grafts NO on the surface of the PPS porous membrane by reaction with strong oxidizing acid3‑、ClO‑、SO4‑、SO3‑、ClO4‑And (3) converting a hydrophobic membrane into a hydrophilic membrane by using hydrophilic groups, coating hydrophilic cellulose and hydrophilic modified inorganic nanoparticles on the surface of the hydrophobic membrane, adjusting the hydrophilicity and the membrane surface aperture of the fiber membrane, and finally preparing the super-hydrophilic PPS composite fiber membrane by using a hot pressing method. The invention utilizes the excellent physical and chemical properties of the PPS non-woven fabric to modify the surface of the membrane, does not damage the internal matrix structure and pore structure of the membrane, and prepares the super-hydrophilic PPS composite fiber membrane with good hydrophilicity, high interception efficiency, large flux, pollution resistance, high strength, good tensile resistance and solvent resistance and high recycling rate.
Description
Technical Field
The invention relates to the field of preparation of polymer membrane materials, in particular to a preparation method of a super-hydrophilic PPS composite fiber membrane.
Background
Because the problem of water pollution is increasingly serious, and the traditional oil-water separation method has the defects of low efficiency, high cost, complex operation and the like, materials with special wettability become research hotspots in recent years and are widely applied to the field of oil-water separation. Compared with a two-dimensional material, the three-dimensional material such as non-woven fabric, aerogel, sponge and the like has the characteristics of sufficient net-shaped gaps, small density, light weight and the like, can provide sufficient adsorption space, and is an excellent choice as an oil-water separation material.
Polyphenylene Sulfide (PPS) as a novel thermoplastic resin has excellent high temperature resistance, solvent resistance, acid and alkali corrosion resistance, radiation resistance, flame retardance and good mechanical property and electrical property, can be used in acidic, alkaline and organic solvents for a long time at a high temperature, and has extremely strong wear resistance and aging resistance. PPS as a membrane material can realize the direct treatment of an organic solvent, and because the PPS has excellent creep resistance, good dimensional stability and high elastic modulus, the dissolution and falling-off of the membrane material can be avoided. Taken together, PPS has the potential to be used as a membrane material. However, due to the hydrophobicity of PPS, the surface of the PPS porous membrane prepared by a hot pressing method is hydrophobic, and when the PPS porous membrane is used as an oil-water separation membrane, the PPS porous membrane is easy to cause low flux and membrane pollution, even pore channel blockage, and severely influences the service life of the membrane. The surface of the membrane is grafted with a substance containing hydrophilic groups, so that the hydrophilic performance of the membrane can be effectively improved, the oil pollution resistance of the membrane can be enhanced, and the service life of the membrane can be prolonged.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a preparation method of a super-hydrophilic PPS composite fiber membrane.
The technical scheme for solving the technical problem is to provide a preparation method of the super-hydrophilic PPS composite fiber membrane, which is characterized by comprising the following steps:
1) soaking the PPS non-woven fabric into a strong oxidizing acid water solution, performing grafting reaction until the PPS non-woven fabric becomes yellow, taking out and washing to be neutral to obtain the oxidized and grafted PPS non-woven fabric;
2) uniformly coating the cellulose treated by the silane coupling agent on the surface of the oxidized and grafted PPS non-woven fabric;
3) mixing and dispersing the hydrophilic modified inorganic nano particles and a demulsifier to form a suspension, and then uniformly coating the suspension on the surface of the oxidized and grafted PPS non-woven fabric coated with the cellulose treated by the silane coupling agent;
4) and (3) carrying out hot pressing on the product obtained in the step 3) to obtain the super-hydrophilic PPS composite fiber membrane.
Compared with the prior art, the invention has the beneficial effects that:
1. the method grafts NO on the surface of the PPS porous membrane by reaction with strong oxidizing acid3-、ClO-、SO4-、SO3-、ClO4-And (3) converting a hydrophobic membrane into a hydrophilic membrane by using hydrophilic groups, coating hydrophilic cellulose and hydrophilic modified inorganic nanoparticles on the surface of the hydrophobic membrane, adjusting the hydrophilicity and the membrane surface aperture of the fiber membrane, and finally preparing the super-hydrophilic PPS composite fiber membrane by using a hot pressing method.
2. The invention utilizes the excellent physical and chemical properties of the PPS non-woven fabric to modify the surface of the membrane, does not damage the internal matrix structure and pore structure of the membrane, and prepares the super-hydrophilic PPS composite fiber membrane with good hydrophilicity, high interception efficiency, large flux, pollution resistance, high strength, good tensile resistance and solvent resistance and high recycling rate.
3. The method is simple to operate, and the super-hydrophilic PPS composite fiber membrane is prepared by simple operation methods such as suction filtration and hot pressing.
Drawings
FIG. 1 is an electron microscope image of a PPS composite fiber film obtained in example 1 of the present invention;
FIG. 2 is an electron microscope image of a PPS composite fiber film obtained in example 6 of the present invention;
FIG. 3 is an electron microscope image of a PPS composite fiber film obtained in example 7 of the present invention;
FIG. 4 is a contact angle chart of a PPS composite fiber membrane obtained in example 9 of the present invention.
Detailed Description
Specific examples of the present invention are given below. The specific examples are only intended to illustrate the invention in further detail and do not limit the scope of protection of the claims of the present application.
The invention provides a preparation method (method for short) of a super-hydrophilic PPS composite fiber membrane, which is characterized by comprising the following steps:
1) ultrasonically cleaning the PPS non-woven fabric by deionized water, ethanol and acetone in sequence to remove impurities such as dust, oil stains and the like on the surface of the PPS non-woven fabric, heating the PPS non-woven fabric to 80-100 ℃ by using an alkaline solution to etch the PPS non-woven fabric, facilitating subsequent grafting reaction, repeatedly washing the PPS non-woven fabric by using deionized water until the PPS non-woven fabric is neutral, and drying the PPS non-woven fabric;
the alkaline solution is a sodium hydroxide solution, a magnesium hydroxide solution, a potassium hydroxide solution, a calcium hydroxide solution, a barium hydroxide solution, a rubidium hydroxide solution, a cesium hydroxide solution, a strontium hydroxide solution, a zinc hydroxide solution, an iron hydroxide solution or a cobalt hydroxide solution; the boiling time is 0.5-3 h;
the PPS non-woven fabric is formed by melting and spraying PPS particles to prepare superfine fibers and then processing the superfine fibers by a spunlace process.
2) Immersing the PPS non-woven fabric obtained in the step 1) into a strong oxidizing acid water solution, performing grafting reaction at normal temperature in an ultrasonic or heating mode until the PPS non-woven fabric turns from white to yellow, taking out and washing to be neutral, and then drying to obtain the oxidized and grafted PPS non-woven fabric;
the strong oxidizing acid is at least one of concentrated nitric acid, concentrated sulfuric acid, hypochlorous acid, chloric acid, chlorous acid, perchloric acid, nitrous acid or permanganic acid; the concentration of the aqueous solution of the strong oxidizing acid is 10-60%;
the heating temperature is 30-80 ℃, and the time is 0.5-12 h; the temperature of the ultrasonic wave is 20-40 ℃, and the time is 0.5-6 h;
3) uniformly coating the cellulose treated by the silane coupling agent on the surface of the oxidized and grafted PPS non-woven fabric in a suction filtration mode;
the silane coupling agent treatment can adopt the prior art, and specifically comprises the following steps: adding fibrous cellulose into an ethanol solution of a silane coupling agent, and stirring at normal temperature for 2-4 h for grafting.
The silane coupling agent is at least one of triaminopropyltriethoxysilane, gamma-aminopropyltriethoxysilane, (3-chloropropyl) trimethoxysilane, mercaptopropyltrimethoxysilane, (3-oxopropyl) trichlorosilane, 3-aminopropyltrimethoxysilane, phenyltriethoxysilane or 3-glycidyloxypropyltrimethoxysilane;
the mass ratio of the oxidized and grafted PPS non-woven fabric to the cellulose treated by the silane coupling agent is 3-7: 1;
4) carrying out ultrasonic dispersion on the mixed solution of the inorganic nano particles and the demulsifier after hydrophilic modification to form a suspension, and then uniformly coating the suspension on the surface of the PPS non-woven fabric subjected to oxidation grafting, which is coated with the cellulose treated by the silane coupling agent;
the mass ratio of the hydrophilic modified inorganic nanoparticles to the demulsifier is 1-5: 1;
the inorganic nano particles are at least one of graphene oxide, silicon dioxide, titanium dioxide, zinc dioxide, carbon nano tubes, fullerene, kaolin or montmorillonite; the hydrophilic modifier is at least one of acrylic acid, butenoic acid, oleic acid, lactic acid, glycolic acid, pyruvic acid or oxalic acid; the demulsifier is at least one of sodium dodecyl benzene sulfonate, polyoxyethylene, polyoxypropylene octadecanol ether, polyoxypropylene, fatty alcohol or polyethylene polyamine;
the hydrophilic modification of the inorganic nanoparticles can adopt the prior art, and specifically comprises the following steps: adding a hydrophilic modifier and inorganic nanoparticles into a solvent, stirring to enable the hydrophilic modifier and the inorganic nanoparticles to be in full contact, then quickly adding an initiator, and stirring for 6-8 hours at the temperature of 60-80 ℃. And after the reaction is finished, the inorganic nano particles are taken out by suction filtration and washed by deionized water so as to remove the residual reactant on the surface of the inorganic nano particles. The solvent is acetone, methanol, ethanol, N-dimethylformamide, N-methylpyrrolidone, dimethyl sulfoxide, tetrachloroethane, dichloromethane, dichloroethane or hexamethylphosphoramide; the initiator is hydrogen peroxide, ammonium persulfate, potassium persulfate, benzoyl peroxide tert-butyl ester, methyl ethyl ketone peroxide, azobisisobutyronitrile, azobisisoheptonitrile and dimethyl azobisisobutyrate
5) Drying the product obtained in the step 4), and then carrying out hot pressing on a hot press to obtain the super-hydrophilic PPS composite fiber membrane.
The hot pressing temperature is 40-110 ℃, the pressure is 1-30 MPa, and the time is 2-20 min.
The test methods in the examples are as follows:
contact angle test: the contact angle of the composite fiber membrane surface was measured using a dynamic contact angle measuring instrument, and all samples were dried in a vacuum oven at 35 ℃ for 6 hours before testing to keep them sufficiently dry. At room temperature 25 ℃, 2 μ L of water beads were dropped on the surface of the film to be tested, and the course of change was recorded. Taking 3-5 points of each membrane to be measured, and averaging.
And (3) pure water flux test: the film was cut to an area of 2.54cm-1The sample is put into a cross flow filtering device, the operation is carried out for 0.5h under the pressure of 0.2MPa, the pressure is adjusted to 0.05MPa, the recording test is carried out on the sample, the data are recorded at intervals of 10 minutes every time, and the average value is taken to obtain the pure water flux.
And (3) testing the separation efficiency: in order to research the oil-water separation performance of the composite fiber membrane, firstly, the oily liquid and deionized water are mixed according to the volume ratio of 1:99, and the mixture is stirred vigorously until the mixture is changed from transparent to milky white, so that oil-water emulsion is obtained. The oily liquid is at least one of phenyl silane, silicone oil, hexadecane, chlorobenzene, chloroform, petroleum ether, toluene, n-hexane, cyclohexane, dichloroethane, dichloromethane or kerosene. And then fixing the composite fiber membrane sample in a sand core filtering device, directly pouring the oil-water emulsion into the device, rapidly permeating the oil-water emulsion through the composite fiber membrane under the action of pressure, and finally using the collected filtrate for testing. The oil-water separation efficiency of the composite fiber membrane is calculated by measuring the oil content in the oil-water emulsion before and after separation.
Example 1
1) Ultrasonically cleaning the PPS non-woven fabric by deionized water, ethanol and acetone in sequence, heating and boiling the PPS non-woven fabric for 1 hour at 100 ℃ by using a 30 wt% NaOH solution, repeatedly washing the PPS non-woven fabric by using the deionized water until the pH value is 7, and drying the PPS non-woven fabric;
2) the product of step 1) is treated with HNO with the molar concentration of 30 percent3Reacting in the solution for 2h at 60 ℃, washing to be neutral by deionized water, and drying;
3) uniformly coating the cellulose treated by 3-glycidyloxypropyltrimethoxysilane and the oxidized and grafted PPS non-woven fabric on the surface of the oxidized and grafted PPS non-woven fabric in a suction filtration mode according to the mass ratio of 1: 6;
4) mixing acrylic acid modified carboxylated carbon nanotubes with sodium dodecyl benzene sulfonate, performing ultrasonic dispersion to form a suspension, and then uniformly coating the surface of the oxidized and grafted PPS non-woven fabric coated with cellulose treated by a silane coupling agent;
5) and (3) carrying out hot pressing on the product obtained in the step 4) for 5min at 85 ℃ and 10MPa on a hot press to obtain the super-hydrophilic PPS composite membrane.
Example 2
The specific reaction conditions were the same as in example 1 except that HNO in step 2) was used3The concentration of the solution was changed to 45%.
Example 3
The specific reaction conditions were the same as in example 1 except that HNO in step 2) was used3The concentration of the solution was changed to 60%.
Example 4
1) Ultrasonically cleaning the PPS non-woven fabric by deionized water, ethanol and acetone in sequence, heating the PPS non-woven fabric by using a 30 wt% NaOH solution at 80 ℃ for boiling for 1h, repeatedly washing the PPS non-woven fabric by using the deionized water until the pH value is 7, and drying the PPS non-woven fabric;
2) HSO of the product of step 1) at a molar concentration of 30%4Reacting in the solution for 2h at 60 ℃, washing to be neutral by deionized water, and drying;
3) uniformly coating the cellulose treated by 3-glycidyloxypropyltrimethoxysilane and the oxidized and grafted PPS non-woven fabric on the surface of the oxidized and grafted PPS non-woven fabric in a suction filtration mode according to the mass ratio of 1: 6;
4) mixing acrylic acid modified carboxylated carbon nanotubes with sodium dodecyl benzene sulfonate, performing ultrasonic dispersion to form a suspension, and then uniformly coating the surface of the oxidized and grafted PPS non-woven fabric coated with cellulose treated by a silane coupling agent;
5) and (3) carrying out hot pressing on the product obtained in the step 4) for 5min at 85 ℃ and 10MPa on a hot press to obtain the super-hydrophilic PPS composite membrane.
Example 5
The specific reaction conditions were the same as in example 1 except that the hot press temperature in step 5) was changed to 80 ℃.
Example 6
The specific reaction conditions were the same as in example 1 except that the hot press temperature in step 5) was changed to 90 ℃.
Example 7
The specific reaction conditions were the same as in example 1 except that the hot press temperature in step 5) was changed to 95 ℃.
Example 8
1) Ultrasonically cleaning the PPS non-woven fabric by deionized water, ethanol and acetone in sequence, heating and boiling the PPS non-woven fabric for 1 hour by using a 30 wt% NaOH solution, repeatedly washing the PPS non-woven fabric by using the deionized water until the pH value is 7, and drying the PPS non-woven fabric;
2) the product of step 1) is treated with HNO with the molar concentration of 30 percent3Reacting in the solution for 2h at 60 ℃, washing to be neutral by deionized water, and drying;
3) uniformly coating the cellulose treated by 3-glycidyloxypropyltrimethoxysilane and the oxidized and grafted PPS non-woven fabric on the surface of the oxidized and grafted PPS non-woven fabric in a suction filtration mode according to the mass ratio of 1: 6;
4) mixing acrylic acid modified carboxylated carbon nanotubes with sodium dodecyl benzene sulfonate, performing ultrasonic dispersion to form a suspension, and then uniformly coating the surface of the oxidized and grafted PPS non-woven fabric coated with cellulose treated by a silane coupling agent;
5) and (3) carrying out hot pressing on the product obtained in the step 4) for 5min at 85 ℃ and 10MPa on a hot press to obtain the super-hydrophilic PPS composite membrane.
Example 9
1) Ultrasonically cleaning the PPS non-woven fabric by deionized water, ethanol and acetone in sequence, heating and boiling the PPS non-woven fabric for 1 hour by using a 30 wt% NaOH solution, repeatedly washing the PPS non-woven fabric by using the deionized water until the pH value is 7, and drying the PPS non-woven fabric;
2) the product of step 1) is treated with HNO with the molar concentration of 30 percent3Reacting in the solution for 2h at 60 ℃, washing to be neutral by deionized water, and drying;
3) uniformly coating the cellulose treated by 3-glycidyloxypropyltrimethoxysilane and the oxidized and grafted PPS non-woven fabric on the surface of the oxidized and grafted PPS non-woven fabric in a suction filtration mode according to the mass ratio of 1: 3;
4) mixing acrylic acid modified carboxylated carbon nanotubes with sodium dodecyl benzene sulfonate, performing ultrasonic dispersion to form a suspension, and then uniformly coating the surface of the oxidized and grafted PPS non-woven fabric coated with cellulose treated by a silane coupling agent;
5) and (3) carrying out hot pressing on the product obtained in the step 4) for 5min at 85 ℃ and 10MPa on a hot press to obtain the super-hydrophilic PPS composite membrane.
As can be seen from the figures 1-3, the loose PPS non-woven fabric after hot pressing is subjected to the action of heat and pressure, the fibers of the non-woven fabric are melted and bonded at the fiber intersection points in the non-woven fabric, so that the slippage resistance between the fibers is increased, and the mechanical strength of the composite fiber membrane is improved. Meanwhile, the bonding and crosslinking among the fibers reduce the membrane aperture of the PPS composite fiber membrane, thereby improving the oil-water separation efficiency of the composite fiber membrane.
As can be seen from comparison of fig. 1 to 3, as the hot pressing temperature increases, the degree of cross-linking between the fibers increases, so that the pore size of the composite fiber membrane decreases, the oil-water separation efficiency increases, but the pure water flux of the membrane slightly decreases.
Fig. 4 shows that the contact angle was significantly reduced by the modified PPS nonwoven fabric compared to the unmodified PPS nonwoven fabric, indicating successful production of the hydrophilic PPS composite fiber membrane.
TABLE 1
Table 1 shows the test results of examples 1 to 9. In table 1: as can be seen from examples 1 to 3, the PPS nonwoven fabric obtained under the same reaction conditions with the nitric acid concentration of 60% had the best hydrophilicity, the contact angle was 89.7 degrees, and the pure water flux was 122887.4735 (L/m)2H). With the increase of the concentration of the nitric acid, the contact angle of the fiber membrane becomes smaller, and the pure water flux becomes larger, which shows that the hydrophilicity of the fiber membrane is better and better.
The different concentrations of the nitric acid have great influence on the hydrophilicity of the fiber membrane, and the main influencing factor is that the strong oxidizing property of the nitric acid oxidizes-S-on the benzene ring of the PPS into-SO-, -SO2-, with simultaneous introduction of-NO2-、-NH2-an equal number of hydrophilic groups. However, since nitric acid is a strong oxidizing acid and has strong corrosiveness, and the strength of the PPS nonwoven fabric is greatly reduced by an excessively high concentration, the concentration of nitric acid is set to 30%.
As can be seen from examples 3 and 4, HNO was used under otherwise identical reaction conditions3The solution-modified PPS nonwoven fabric has better hydrophilicity. This is due to HSO4After the solution modification, the PPS benzene ring is grafted with-SO3-、-SO4The hydrophilicity ratio of these groups to HNO3Solution modified-NO grafted on benzene ring2-、-NH2Poor, so that the PPS nonwoven fabric modified with the solution has poor hydrophilicity.
It can be seen from examples 1 and 5 to 7 that under the same other reaction conditions, the separation efficiency of the PPS nonwoven fabric gradually increases with the increase of the hot pressing temperature, and the main reason is that the PPS nonwoven fabric is thermally crosslinked after the temperature increases to the glass transition temperature of the PPS, and the degree of crosslinking increases under the action of pressure to reduce the pore size of the fiber membrane, so that the separation efficiency is improved.
As can be seen from examples 8 and 9, under the same reaction conditions, the separation efficiency is not greatly affected by the different proportion of PPS fibers, and the flux is slightly reduced.
Nothing in this specification is said to apply to the prior art.
Claims (10)
1. A preparation method of a super-hydrophilic PPS composite fiber membrane is characterized by comprising the following steps:
1) soaking the PPS non-woven fabric into a strong oxidizing acid water solution, performing grafting reaction until the PPS non-woven fabric becomes yellow, taking out and washing to be neutral to obtain the oxidized and grafted PPS non-woven fabric;
2) uniformly coating the cellulose treated by the silane coupling agent on the surface of the oxidized and grafted PPS non-woven fabric;
3) mixing and dispersing the hydrophilic modified inorganic nano particles and a demulsifier to form a suspension, and then uniformly coating the suspension on the surface of the oxidized and grafted PPS non-woven fabric coated with the cellulose treated by the silane coupling agent;
4) and (3) carrying out hot pressing on the product obtained in the step 3) to obtain the super-hydrophilic PPS composite fiber membrane.
2. The method for preparing the superhydrophilic PPS composite fiber membrane according to claim 1, wherein in the step 1), the grafting reaction process is ultrasonic or heating at normal temperature; the heating temperature is 30-80 ℃, and the time is 0.5-12 h; the ultrasonic time is 0.5-6 h.
3. The method for preparing a superhydrophilic PPS composite fiber membrane according to claim 1, wherein in step 1), the strong oxidizing acid is at least one of concentrated nitric acid, concentrated sulfuric acid, hypochlorous acid, chloric acid, chlorous acid, perchloric acid, nitrous acid, or permanganic acid.
4. The method for preparing a superhydrophilic PPS composite fiber membrane according to claim 1, wherein in the step 1), the concentration of the aqueous solution of the strong oxidizing acid is 10 to 60%.
5. The method of claim 1, wherein in step 2), the silane coupling agent is at least one of triaminopropyltriethoxysilane, gamma-aminopropyltriethoxysilane, (3-chloropropyl) trimethoxysilane, mercaptopropyltrimethoxysilane, (3-oxypropyl) trichlorosilane, 3-aminopropyltrimethoxysilane, phenyltriethoxysilane, or 3-glycidyloxypropyltrimethoxysilane.
6. The method for preparing the super-hydrophilic PPS composite fiber membrane according to claim 1, wherein in the step 2), the mass ratio of the oxidized and grafted PPS non-woven fabric to the cellulose treated by the silane coupling agent is 3-7: 1.
7. The preparation method of the super-hydrophilic PPS composite fiber membrane according to claim 1, characterized in that in the step 3), the mass ratio of the inorganic nano particles subjected to hydrophilic modification to the demulsifier is 1-5: 1.
8. The method for preparing the superhydrophilic PPS composite fiber membrane according to claim 1, wherein in the step 3), the inorganic nanoparticles are at least one of graphene oxide, silicon dioxide, titanium dioxide, zinc dioxide, carbon nanotubes, fullerene, kaolin or montmorillonite; the hydrophilic modifier is at least one of acrylic acid, butenoic acid, oleic acid, lactic acid, glycolic acid, pyruvic acid or oxalic acid; the demulsifier is at least one of sodium dodecyl benzene sulfonate, polyoxyethylene, polyoxypropylene octadecanol ether, polyoxypropylene, fatty alcohol or polyethylene polyamine.
9. The preparation method of the super-hydrophilic PPS composite fiber membrane according to claim 1, characterized in that in the step 4), hot pressing is carried out on a hot press, the hot pressing temperature is 40-110 ℃, the pressure is 1-30 MPa, and the time is 2-20 min.
10. The method for preparing a superhydrophilic PPS composite fiber membrane according to claim 1, wherein the PPS nonwoven fabric is pretreated before performing the step 1): ultrasonically cleaning the PPS non-woven fabric by deionized water, ethanol and acetone in sequence to remove impurities on the surface of the PPS non-woven fabric, heating the PPS non-woven fabric to 80-100 ℃ by using an alkaline solution to etch the PPS non-woven fabric, facilitating subsequent grafting reaction, and repeatedly washing the PPS non-woven fabric by using deionized water until the PPS non-woven fabric is neutral;
the alkaline solution is a sodium hydroxide solution, a magnesium hydroxide solution, a potassium hydroxide solution, a calcium hydroxide solution, a barium hydroxide solution, a rubidium hydroxide solution, a cesium hydroxide solution, a strontium hydroxide solution, a zinc hydroxide solution, an iron hydroxide solution or a cobalt hydroxide solution; the boiling time is 0.5-3 h.
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CN113078372A (en) * | 2021-04-09 | 2021-07-06 | 江苏大学 | Zinc ion solid electrolyte, application thereof in quasi-solid zinc ion battery and preparation method thereof |
CN113668141A (en) * | 2021-08-25 | 2021-11-19 | 青岛大学 | Preparation method of super-hydrophilic oleophylic fiber membrane for kitchen |
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