CN107163188A - A kind of preparation method of chemical modification xanthans - Google Patents
A kind of preparation method of chemical modification xanthans Download PDFInfo
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- CN107163188A CN107163188A CN201710506124.0A CN201710506124A CN107163188A CN 107163188 A CN107163188 A CN 107163188A CN 201710506124 A CN201710506124 A CN 201710506124A CN 107163188 A CN107163188 A CN 107163188A
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- xanthans
- chemical modification
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- acrylamide
- xantham gum
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- 229920001285 xanthan gum Polymers 0.000 title claims abstract description 94
- 238000007385 chemical modification Methods 0.000 title claims abstract description 16
- 238000002360 preparation method Methods 0.000 title claims abstract description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 31
- HRPVXLWXLXDGHG-UHFFFAOYSA-N Acrylamide Chemical compound NC(=O)C=C HRPVXLWXLXDGHG-UHFFFAOYSA-N 0.000 claims abstract description 17
- USHAGKDGDHPEEY-UHFFFAOYSA-L potassium persulfate Chemical compound [K+].[K+].[O-]S(=O)(=O)OOS([O-])(=O)=O USHAGKDGDHPEEY-UHFFFAOYSA-L 0.000 claims abstract description 14
- 235000019394 potassium persulphate Nutrition 0.000 claims abstract description 14
- GYZLOYUZLJXAJU-UHFFFAOYSA-N diglycidyl ether Chemical compound C1OC1COCC1CO1 GYZLOYUZLJXAJU-UHFFFAOYSA-N 0.000 claims abstract description 13
- 239000000178 monomer Substances 0.000 claims abstract description 5
- 239000003431 cross linking reagent Substances 0.000 claims abstract description 4
- 239000003999 initiator Substances 0.000 claims abstract description 4
- 229920000578 graft copolymer Polymers 0.000 claims abstract description 3
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 41
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 14
- 238000001914 filtration Methods 0.000 claims description 12
- 238000003756 stirring Methods 0.000 claims description 12
- 239000000376 reactant Substances 0.000 claims description 9
- 239000012153 distilled water Substances 0.000 claims description 7
- 238000001035 drying Methods 0.000 claims description 7
- 229910052757 nitrogen Inorganic materials 0.000 claims description 7
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims description 6
- 239000012046 mixed solvent Substances 0.000 claims description 6
- 238000006243 chemical reaction Methods 0.000 claims description 4
- 238000000746 purification Methods 0.000 claims description 4
- 125000002887 hydroxy group Chemical group [H]O* 0.000 claims description 2
- 235000013847 iso-butane Nutrition 0.000 claims description 2
- NNPPMTNAJDCUHE-UHFFFAOYSA-N isobutane Chemical compound CC(C)C NNPPMTNAJDCUHE-UHFFFAOYSA-N 0.000 claims description 2
- IJDNQMDRQITEOD-UHFFFAOYSA-N sec-butylidene Natural products CCCC IJDNQMDRQITEOD-UHFFFAOYSA-N 0.000 claims description 2
- 238000004062 sedimentation Methods 0.000 claims description 2
- 230000003311 flocculating effect Effects 0.000 abstract description 8
- 230000002708 enhancing effect Effects 0.000 abstract description 4
- 239000003463 adsorbent Substances 0.000 abstract description 2
- 239000003814 drug Substances 0.000 abstract description 2
- 235000013305 food Nutrition 0.000 abstract description 2
- 239000010842 industrial wastewater Substances 0.000 abstract description 2
- 238000004806 packaging method and process Methods 0.000 abstract description 2
- 239000000203 mixture Substances 0.000 description 20
- 229940082509 xanthan gum Drugs 0.000 description 7
- 235000010493 xanthan gum Nutrition 0.000 description 7
- 239000000230 xanthan gum Substances 0.000 description 7
- 229920002472 Starch Polymers 0.000 description 6
- 229920001577 copolymer Polymers 0.000 description 6
- 239000000243 solution Substances 0.000 description 6
- 239000008107 starch Substances 0.000 description 6
- 235000019698 starch Nutrition 0.000 description 6
- 150000003926 acrylamides Chemical class 0.000 description 5
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 5
- 230000000977 initiatory effect Effects 0.000 description 5
- 239000001301 oxygen Substances 0.000 description 5
- 229910052760 oxygen Inorganic materials 0.000 description 5
- 239000002244 precipitate Substances 0.000 description 5
- 238000007334 copolymerization reaction Methods 0.000 description 3
- 229920001222 biopolymer Polymers 0.000 description 2
- 238000004132 cross linking Methods 0.000 description 2
- 238000003918 potentiometric titration Methods 0.000 description 2
- 150000003254 radicals Chemical class 0.000 description 2
- -1 sulfate anion free radical Chemical class 0.000 description 2
- NIXOWILDQLNWCW-UHFFFAOYSA-N Acrylic acid Chemical compound OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- 241000193830 Bacillus <bacterium> Species 0.000 description 1
- WQZGKKKJIJFFOK-GASJEMHNSA-N Glucose Natural products OC[C@H]1OC(O)[C@H](O)[C@@H](O)[C@@H]1O WQZGKKKJIJFFOK-GASJEMHNSA-N 0.000 description 1
- ZJCCRDAZUWHFQH-UHFFFAOYSA-N Trimethylolpropane Chemical compound CCC(CO)(CO)CO ZJCCRDAZUWHFQH-UHFFFAOYSA-N 0.000 description 1
- 239000007983 Tris buffer Substances 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 125000003545 alkoxy group Chemical group 0.000 description 1
- 150000001408 amides Chemical class 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000711 cancerogenic effect Effects 0.000 description 1
- 231100000315 carcinogenic Toxicity 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 235000009508 confectionery Nutrition 0.000 description 1
- 125000005469 ethylenyl group Chemical group 0.000 description 1
- 238000000855 fermentation Methods 0.000 description 1
- 230000004151 fermentation Effects 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 150000004676 glycans Chemical class 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229920001519 homopolymer Polymers 0.000 description 1
- 230000002209 hydrophobic effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- FQPSGWSUVKBHSU-UHFFFAOYSA-N methacrylamide Chemical group CC(=C)C(N)=O FQPSGWSUVKBHSU-UHFFFAOYSA-N 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 229920001282 polysaccharide Polymers 0.000 description 1
- 239000005017 polysaccharide Substances 0.000 description 1
- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 description 1
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 230000008961 swelling Effects 0.000 description 1
- 229920002994 synthetic fiber Polymers 0.000 description 1
- 229910052723 transition metal Inorganic materials 0.000 description 1
- 150000003624 transition metals Chemical class 0.000 description 1
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 1
- 229920002554 vinyl polymer Polymers 0.000 description 1
- 239000003643 water by type Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F251/00—Macromolecular compounds obtained by polymerising monomers on to polysaccharides or derivatives thereof
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F8/00—Chemical modification by after-treatment
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Polysaccharides And Polysaccharide Derivatives (AREA)
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
- Graft Or Block Polymers (AREA)
Abstract
The invention belongs to chemical modification xanthans field, and in particular to a kind of preparation method of chemical modification xanthans, and using potassium peroxydisulfate as initiator, acrylamide is grafted monomers, and trihydroxymethylpropanyltri diglycidyl ether is crosslinking agent, prepares graft copolymer.The modified xantham gum water suction enhancing of acquisition, flocculating effect enhancing can also obtain high grafting rate under conditions of relatively low xanthans and acrylamide ratio, xanthans is had broader practice prospect.The present invention is easy to operate, and cost is relatively low；Obtained modified xantham gum can be used as adsorbent and great role played in industrial wastewater, it can also be used to packaging for foodstuff, food is reached fresh-keeping purpose, it can also be used to medicine controlled releasing.
Description
Technical field
The invention belongs to chemical modification xanthans field, and in particular to a kind of preparation method of chemical modification xanthans.
Background technology
Xanthans is also known as yellow glue, xanthan gum, and Xanthan Gum is the exocellular polysaccharide that starch is produced through yellow born of the same parents' bacillus fermentation
Class biopolymer, nontoxic, degradable, with high viscosity, acid and alkali resistance, salt, resistance to thermal property and suspension and thixotropy etc.
Unique physicochemical property, with the premium properties not available for many high molecular synthetic materials, native biopolymer material.
The method of modifying of current xanthans is a lot, compounding, hydrophobic and transition metal crosslinking, graft copolymerization, microwave, radiation
Deng.Wherein by carrying out graft copolymerization with vinyl monomer, the performance of xanthans can be made further to be improved or obtained
New characteristic, so as to be more widely used.Existing literature once reported that xanthans carried out graft copolymerization with acrylamide, both
The characteristic of xanthans itself is remained, the characteristics of there is methacrylamide homopolymer again.But acrylamide monomer concentration is to grafting
Copolyreaction influence is larger, it is necessary to could obtain high grafting rate under the conditions of the acrylamide of higher concentration.Study in addition
Know that excessive propene acid amides can be carcinogenic so that this modified xantham gum application prospect is limited.
The content of the invention
It is an object of the invention to provide a kind of preparation method of chemical modification xanthans, in relatively low xanthans and propylene
Also high grafting rate can be obtained under conditions of acid amides ratio, the modified xantham gum flocculating effect enhancing of acquisition has xanthans
Broader practice prospect.
A kind of preparation method of chemical modification xanthans of the present invention, using potassium peroxydisulfate as initiator, acrylamide is to connect
Branch monomer, trihydroxymethylpropanyltri diglycidyl ether is crosslinking agent, prepares graft copolymer.
The preparation method concrete operations are as follows：Xanthans is dissolved in distilled water, 25~30 DEG C of waters bath with thermostatic control are placed in
Constant temperature is stirred and leads to nitrogen protection in pot, and acrylamide is added after xanthans is completely dissolved and trimethylolpropane tris shrinks sweet
The stirring of oily ether, treats that bath temperature reaches 50~70 DEG C and under the conditions of complete anaerobic, add potassium peroxydisulfate and stirring reaction 3~
5h, reactant handles through subsequent purification and obtains modified xantham gum.
The mass ratio of the xanthans and the acrylamide is 1：5~15.
The mass volume ratio of the xanthans and trihydroxymethylpropanyltri diglycidyl ether is 1:0.26~0.76.
The mass ratio of the xanthans and the potassium peroxydisulfate is 1:0.2~0.4.
The subsequent purification processing comprises the following steps：It is 1~4 to pour into volume ratio while stirring in reactant:1 second
Alcohol/water mixed solvent sedimentation, precipitum volume ratio is 1~4:1 ethanol/water mixed solvent is fully washed, after use volume ratio
For 1~4:1 ethanol/water mixed solvent soaks 12~24h, and filtering is drying to obtain modified xantham gum.
The present invention can also obtain high grafting rate under conditions of relatively low xanthans and acrylamide ratio, i.e. institute
The mass ratio for stating xanthans and the acrylamide is 1：5, the matter of the xanthans and trihydroxymethylpropanyltri diglycidyl ether
It is 1 to measure volume ratio:0.76, the mass ratio of the xanthans and the potassium peroxydisulfate is 1:0.4, and react bath temperature reach
To 70 DEG C.
The main function mechanism of chemical modification of the present invention is that in the course of the polymerization process, potassium peroxydisulfate initiator is decomposed under heating
Produce sulfate anion free radical.Then potentiometric titrations and xanthans chain reaction, destroy D-Glucose in xanthans
Ring structure, result in some more active groups, such as alkoxy.Potentiometric titrations attack acrylamide and three hydroxyls simultaneously
Methylpropane triglycidyl ether molecule, causes the formation of acrylamide and trihydroxymethylpropanyltri diglycidyl ether free radical.
Monomer molecule xanthans near reaction site, acrylamide and trihydroxymethylpropanyltri diglycidyl ether turn into by start of chain
The acceptor of the free radical of generation, itself turns into the free radical donor of neighboring molecule, this causes grafted chain to increase without limitation thereafter.In chain
During growth, the terminal ethylenyl groups of polymer chain and crosslinking agent trihydroxymethylpropanyltri diglycidyl ether are reacted.Then, copolymer
It is made up of the crosslinking and network structure gradually formed, obtains modified xantham gum.
The remarkable advantage of the present invention is：
(1) chemical modification xanthans can make xanthans water suction enhancing, and swelling behavior is improved, and aperture increases, flocculating effect increases
By force, high grafting rate can also be obtained under conditions of relatively low xanthans and acrylamide ratio；
(2) present invention is easy to operate, and cost is relatively low；
(3) modified xantham gum produced by the present invention can be used as adsorbent and great role played in industrial wastewater, it is also possible to
In packaging for foodstuff, food is set to reach fresh-keeping purpose, it can also be used to medicine controlled releasing.
Brief description of the drawings
The present invention is further illustrated in conjunction with the embodiments with reference to the accompanying drawings.
Fig. 1 is non-modified xanthans surface scan electron microscope；
Fig. 2 is modified xantham gum surface scan electron microscope in embodiment 1.
Embodiment
In order that content of the present invention easily facilitates understanding, with reference to embodiment to of the present invention
Technical scheme is described further, but the present invention is not limited only to this.
Embodiment 1：
1g xanthans is dissolved in constant temperature in 150mL distilled water and is stirred continuously 60min.Then by 15g acrylamides and 260
μ L trihydroxymethylpropanyltri diglycidyl ether is added in xanthan gum solution and stirs 30min, and device is full of nitrogen at least
30min saturations are to remove dissolved oxygen.And bath temperature reaches 70 DEG C, add 0.2g potassium peroxydisulfates and react 4h with initiation grafting
Copolymer.By by ethanol/water mixture (4:1, v/v) pouring into precipitates modified xanthans in reactant mixture.Filtering is heavy
Ethanol/water mixture (4 is used under starch, high-speed stirred:1, v/v) fully wash for several times, then with ethanol/water mixture (4:1,
V/v 24h) is soaked.Modified xantham gum is collected by filtration, and modified xantham gum is drying to obtain in 50 DEG C of air dry ovens.
Obtained modified xantham gum is compared with not chemically modified xanthans, and its flocculating rate reaches 95.88%, grafting rate
Reach 1851.66%.As illustrated in fig. 1 and 2, Fig. 1 is not chemically modified xanthans, substantially without hole；Fig. 2 changes to be obtained
Property xanthans bore dia be 2.756 μm, fractal dimension is 3.378.
Embodiment 2：
1g xanthans is dissolved in constant temperature in 150mL distilled water and is stirred continuously 60min.Then by 15g acrylamides and 390
μ L trihydroxymethylpropanyltri diglycidyl ether is added in xanthan gum solution and stirs 30min, and device is full of nitrogen at least
30min saturations are to remove dissolved oxygen.And bath temperature reaches 70 DEG C, add 0.3g potassium peroxydisulfates and react 4h with initiation grafting
Copolymer.By by ethanol/water mixture (4:1, v/v) pouring into precipitates modified xanthans in reactant mixture.Filtering is heavy
Ethanol/water mixture (4 is used under starch, high-speed stirred:1, v/v) fully wash for several times, then with ethanol/water mixture (4:1,
V/v 24h) is soaked.Modified xantham gum is collected by filtration, and modified xantham gum is drying to obtain in 50 DEG C of air dry ovens.
Obtained modified xantham gum is compared with not chemically modified xanthans, and its flocculating rate reaches 91.88%, grafting rate
Reach 1896.36%.
Embodiment 3：
1g xanthans is dissolved in constant temperature in 150mL distilled water and is stirred continuously 60min.Then by 15g acrylamides and 520
μ L trihydroxymethylpropanyltri diglycidyl ether is added in xanthan gum solution and stirs 30min, and device is full of nitrogen at least
30min saturations are to remove dissolved oxygen.And bath temperature reaches 60 DEG C, add 0.3g potassium peroxydisulfates and react 4h with initiation grafting
Copolymer.By by ethanol/water mixture (4:1, v/v) pouring into precipitates modified xanthans in reactant mixture.Filtering is heavy
Ethanol/water mixture (4 is used under starch, high-speed stirred:1, v/v) fully wash for several times, then with ethanol/water mixture (4:1,
V/v 24h) is soaked.Modified xantham gum is collected by filtration, and modified xantham gum is drying to obtain in 50 DEG C of air dry ovens.
Obtained modified xantham gum is compared with not chemically modified xanthans, and its flocculating rate reaches 93.25%, grafting rate
Reach 1583.85%.
Embodiment 4：
1g xanthans is dissolved in constant temperature in 150mL distilled water and is stirred continuously 60min.Then by 10g acrylamides and 630
μ L trihydroxymethylpropanyltri diglycidyl ether is added in xanthan gum solution and stirs 30min, and device is full of nitrogen at least
30min saturations are to remove dissolved oxygen.And bath temperature reaches 70 DEG C, add 0.3g potassium peroxydisulfates and react 4h with initiation grafting
Copolymer.By by ethanol/water mixture (4:1, v/v) pouring into precipitates modified xanthans in reactant mixture.Filtering is heavy
Ethanol/water mixture (4 is used under starch, high-speed stirred:1, v/v) fully wash for several times, then with ethanol/water mixture (4:1,
V/v 24h) is soaked.Modified xantham gum is collected by filtration, and modified xantham gum is drying to obtain in 50 DEG C of air dry ovens.
Obtained modified xantham gum is compared with not chemically modified xanthans, and its flocculating rate reaches 91.00%, grafting rate
Reach 1607.88%.
Embodiment 5：
1g xanthans is dissolved in constant temperature in 150mL distilled water and is stirred continuously 60min.Then by 5g acrylamides and 760 μ
L trihydroxymethylpropanyltri diglycidyl ether is added in xanthan gum solution and stirs 30min, and device is full of nitrogen at least
30min saturations are to remove dissolved oxygen.And bath temperature reaches 70 DEG C, add 0.4g potassium peroxydisulfates and react 4h with initiation grafting
Copolymer.By by ethanol/water mixture (4:1, v/v) pouring into precipitates modified xanthans in reactant mixture.Filtering is heavy
Ethanol/water mixture (4 is used under starch, high-speed stirred:1, v/v) fully wash for several times, then with ethanol/water mixture (4:1,
V/v 24h) is soaked.Modified xantham gum is collected by filtration, and modified xantham gum is drying to obtain in 50 DEG C of air dry ovens.
Obtained modified xantham gum is compared with not chemically modified xanthans, and its flocculating rate reaches 89.00%, grafting rate
Reach 1976.46%.
Although the foregoing describing the embodiment of the present invention, those familiar with the art should manage
Solution, the specific embodiment described by us is merely exemplary, rather than for the restriction to the scope of the present invention, is familiar with this
The equivalent modification and change that the technical staff in field is made in the spirit according to the present invention, should all cover the present invention's
In scope of the claimed protection.
Claims (6)
1. a kind of preparation method of chemical modification xanthans, it is characterised in that：Using potassium peroxydisulfate as initiator, acrylamide is to connect
Branch monomer, trihydroxymethylpropanyltri diglycidyl ether is crosslinking agent, prepares graft copolymer.
2. the preparation method of chemical modification xanthans according to claim 1, it is characterised in that：The preparation method is specific
Operation is as follows：Xanthans is dissolved in distilled water, constant temperature in 25~30 DEG C of thermostat water baths is placed in and stirs and lead to nitrogen protection,
Acrylamide and trihydroxymethylpropanyltri diglycidyl ether stirring are added after xanthans is completely dissolved, treats that bath temperature reaches 50
~70 DEG C and under the conditions of complete anaerobic, potassium peroxydisulfate and 3~5h of stirring reaction are added, reactant is handled through subsequent purification
To modified xantham gum.
3. the preparation method of chemical modification xanthans according to claim 1, it is characterised in that：The xanthans with it is described
The mass ratio of acrylamide is 1：5~15.
4. the preparation method of chemical modification xanthans according to claim 1, it is characterised in that：The xanthans and three hydroxyls
The mass volume ratio of methylpropane triglycidyl ether is 1:0.26~0.76.
5. the preparation method of chemical modification xanthans according to claim 1, it is characterised in that：The xanthans with it is described
The mass ratio of potassium peroxydisulfate is 1:0.2~0.4.
6. the preparation method of chemical modification xanthans according to claim 1, it is characterised in that：The subsequent purification processing
Comprise the following steps：It is 1~4 to pour into volume ratio while stirring in reactant:1 ethanol/water mixed solvent sedimentation, precipitum
It is 1~4 with volume ratio:1 ethanol/water mixed solvent is fully washed, and rear is 1~4 with volume ratio:1 ethanol/water mixed solvent
12~24h is soaked, filtering is drying to obtain modified xantham gum.
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| CN201710506124.0A CN107163188B (en) | 2017-06-28 | 2017-06-28 | A kind of preparation method of chemical modification xanthan gum |
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| CN201710506124.0A CN107163188B (en) | 2017-06-28 | 2017-06-28 | A kind of preparation method of chemical modification xanthan gum |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108585664A (en) * | 2018-06-13 | 2018-09-28 | 安徽臻烁新材料技术有限公司 | A kind of preparation method of high-strength insulation wallboard |
| CN108676122A (en) * | 2018-05-09 | 2018-10-19 | 福建省农业科学院农业生物资源研究所 | A kind of novel pH sensitive hydrogels and the preparation method and application thereof |
| CN109082102A (en) * | 2018-07-10 | 2018-12-25 | 天长市优信电器设备有限公司 | A kind of high stability charger case |
| CN109181261A (en) * | 2018-07-10 | 2019-01-11 | 天长市优信电器设备有限公司 | A kind of resistant to bending polycarbonate charger case |
| CN109251499A (en) * | 2018-07-10 | 2019-01-22 | 天长市优信电器设备有限公司 | A kind of charger case material preparation method of high tensile |
| CN111154009A (en) * | 2020-01-10 | 2020-05-15 | 江南大学 | Preparation method of diepoxide cross-linking agent modified xanthan gum |
| CN112500583A (en) * | 2020-11-23 | 2021-03-16 | 江南大学 | Hydrophobically modified xanthan gum solution and preparation method and application thereof |
| CN114806778A (en) * | 2022-05-25 | 2022-07-29 | 阜阳师范大学 | Strawberry fruit wine production process |
| CN115055165A (en) * | 2022-06-06 | 2022-09-16 | 山西首爱动物药业有限公司 | Physical adsorption water quality modifier |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108676122A (en) * | 2018-05-09 | 2018-10-19 | 福建省农业科学院农业生物资源研究所 | A kind of novel pH sensitive hydrogels and the preparation method and application thereof |
| CN108676122B (en) * | 2018-05-09 | 2021-03-02 | 福建省农业科学院农业生物资源研究所 | Novel pH sensitive hydrogel and preparation method and application thereof |
| CN108585664A (en) * | 2018-06-13 | 2018-09-28 | 安徽臻烁新材料技术有限公司 | A kind of preparation method of high-strength insulation wallboard |
| CN109082102A (en) * | 2018-07-10 | 2018-12-25 | 天长市优信电器设备有限公司 | A kind of high stability charger case |
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| CN111154009A (en) * | 2020-01-10 | 2020-05-15 | 江南大学 | Preparation method of diepoxide cross-linking agent modified xanthan gum |
| CN112500583A (en) * | 2020-11-23 | 2021-03-16 | 江南大学 | Hydrophobically modified xanthan gum solution and preparation method and application thereof |
| CN112500583B (en) * | 2020-11-23 | 2022-06-24 | 无锡市德宁节能科技有限公司 | Hydrophobically modified xanthan gum solution and preparation method and application thereof |
| CN114806778A (en) * | 2022-05-25 | 2022-07-29 | 阜阳师范大学 | Strawberry fruit wine production process |
| CN114806778B (en) * | 2022-05-25 | 2023-12-01 | 阜阳师范大学 | Strawberry fruit wine production process |
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