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Preparation of plural gel water absorbent material composed of silk fibroin/acrylic acid/acrylamide

A technology of silk fibroin and acrylamide, which is applied in the field of preparation of silk fibroin/acrylic acid/acrylamide composite gel water-absorbing materials, which can solve the problems of easily polluting the environment, not easy to degrade, material sources, preparation and processing costs, and soil structure. and other issues to achieve the effect of reducing environmental pollution

Inactive Publication Date: 2009-09-16
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] At present, although the widely used synthetic polymer water-absorbing materials have high water absorption rate, they are not easy to degrade and pollute the environment after use.
The natural polymer water-absorbing materials that have been developed include starch, cellulose, alginic acid, polylactic acid, etc., which have certain biodegradability. It has a shortpart
Except for gelatin and feathers, protein-based water-absorbing materials are less developed at present.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0022] Preparation of silk fibroin solution:

[0023] Put the clean silkworm waste cocoon silk into Na 2 CO 3 After boiling water degumming, use a weight percentage of 50% CaCl 2 The solution was dissolved at 98°C, filtered, dialyzed, and concentrated to obtain an SF solution with a concentration of 8% for use.

Embodiment 1

[0025] (1) Weigh 2.65g analytically pure AA solution into a beaker, add 1.03g 10% (w / w) NaOH solution dropwise at room temperature of 20~30℃ to make the neutralization degree of AA reach 70%; then add 1.35g analytically pure AM solids were stirred to obtain a mixed solution of monomer (AA / AM).

[0026] (2) Add 2g SF into a 25ml distilled water reactor, place it on a thermostatic magnetic stirrer and heat it in a water bath (70℃); then add 0.072g ammonium persulfate (abbreviated as APS), and then add monomer (AA / AM) Mixed liquid and 0.006g N,N'-dimethylbisacrylamide (abbreviated as MBA).

[0027] (3) Control the temperature of the water bath at 70℃, and stir while heating. When the reactant becomes gel and becomes viscous to the difficulty of stirring, stop stirring, and then let it stand. The reaction time of stirring and standing is 2h.

[0028] (4) Take out the prepared gel and wash it with deionized water to obtain a hydrogel-like composite water-absorbing material.

[0029] (5...

Embodiment 2

[0037] (1) Weigh 2.65g of AA solution into a beaker, add 1.177g of 10% (w / w) NaOH solution dropwise at room temperature of 20~30℃ to make the neutralization degree of AA reach 80%; then add 1.35g AM The solid material is stirred to obtain a mixed solution of monomer (AA / AM).

[0038] (2) Add 2g SF into a 25ml distilled water reactor, place it on a thermostatic magnetic stirrer and heat it in a water bath (80℃); then add 0.1g ammonium persulfate (abbreviated as APS), and then add monomer (AA / AM) The mixed solution and 0.012g N,N'-dimethylbisacrylamide (abbreviated as MBA).

[0039] (3) Control the temperature of the water bath at 80°C and stir while heating. When the reactant becomes gelatinous and becomes viscous to the point of difficulty in stirring, stop stirring, and then stand for a total of 2 hours.

[0040] (4) Take out the prepared gel and wash it with deionized water to obtain a hydrogel-like composite water-absorbing material.

[0041] (5) After cutting the hydrogel-like...

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Abstract

The invention discloses a method for preparing plural gel water absorbent material composed of silk fibroin / acrylic acid / acrylamide, comprising the following steps: dropping NaOH solution and acrylamide solids into analytical pure acrylic acid solution to obtain mixed solution of acrylic acid / acrylamide monomer after stirring; heating silk fibroin solution water bath, then adding initiating agent ammonium persulfate and the mixed solution of acrylic acid / acrylamide monomer, finally adding a cross linker N, N'-dimethyl bisacrylamide; heating and stirring to form gel, taking out the gel after standing, washing the gel by deionized water to obtain the plural gel water absorbent material composed of silk fibroin / acrylic acid / acrylamide. The material of the invention has not only hydrophile hygroscopicity but also biodegradability.

Description

Technical field [0001] The invention relates to the field of processing and utilization of silk fibroin, in particular to a method for preparing a silk fibroin / acrylic acid / acrylamide composite gel water-absorbing material for water absorption and water retention. Background technique [0002] Silk Fibroin (SF) is a natural structural protein, composed of crystalline and non-crystalline regions. Because of its special molecular structure, it has hydrophilic hygroscopicity, biodegradability, mechanical extension properties, etc. It is good The water-absorbing material base material can be extracted and prepared from waste silkworm cocoon silk. [0003] Acrylic acid (AA) is a colorless liquid, soluble in water, ethanol, and ether. Resin and synthetic rubber emulsion are used in construction, papermaking, leather, textile, household chemicals, water treatment and other fields. Polypropylene and acrylic acid copolymers produced with acrylic acid are used as dispersants, flocculants a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F289/00C08H1/00
Inventor 朱良均汪琦翀闵思佳张海萍
Owner ZHEJIANG UNIV