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A kind of silk fibroin superabsorbent material and preparation method thereof

A technology of super absorbent material and silk fibroin, applied in the field of silk fibroin super absorbent material, can solve the problems of low water absorption rate, high reaction temperature, high toxicity, etc., achieve good biocompatibility, reduce reaction temperature, and improve swelling effect of ability

Active Publication Date: 2021-09-17
NANTONG TEXTILE & SILK IND TECH RES INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Before the patent of the present invention, such as the Chinese Patent Application No. CN201110202099.X, the invention patent titled "Preparation method of a cellulose-based water-absorbing material" disclosed a water-absorbing material, which used a large amount of acrylic acid, etc. Chemical raw materials, highly toxic, and cannot be degraded, polluting the environment
Another example is the Chinese Patent Application No. CN201811370358.8, which is titled "A Skin-Friendly Super Absorbent Material for Infant Diapers and Its Preparation Method". Further improve
There is also a Chinese patent application number CN201811006464.8, titled "A Photocurable Silk Fibroin Hydrogel and Its Preparation Method". In this patent, the reaction temperature is too high during the photocurable crosslinking process, which leads to the formation of a partial crystalline structure. , which greatly limits the reswellability of the material

Method used

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  • A kind of silk fibroin superabsorbent material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The preparation of embodiment 1 silk fibroin solution

[0026] Select fresh silkworm cocoons produced in the current year, remove silkworm chrysalis and other sundries, and obtain silkworm cocoon shells. Weigh 80 g silkworm cocoon shells with a precision balance, prepare 4000 mL of sodium bicarbonate / sodium carbonate aqueous solution with a mass fraction of 0.01M and pH=9.5, heat it to boiling with an induction cooker, add the cocoon shells, and adjust the power of the induction cooker to keep the aqueous solution slightly boiling for 30 minutes , take out the cocoons and clean them with deionized water.

[0027] The above test was repeated three times to remove the sericin, and then the cocoon silk was taken out and dried in an oven at 60° C. to obtain pure silk fibroin fibers. Dissolve pure silk fibroin fibers in a lithium bromide solution with a concentration of 9.3mol / L at a bath ratio of 20:150, and dissolve in a constant temperature magnetic stirrer at 60±2°C for...

Embodiment 2

[0028] The preparation of embodiment 2 silk fibroin superabsorbent material

[0029] (1) Adjust the concentration of the pure silk fibroin solution in Example 1 to 30 mg / mL with deionized water to obtain an aqueous silk fibroin solution.

[0030] (2) Add riboflavin and horseradish peroxidase solution to the silk fibroin aqueous solution to obtain a reaction solution. The riboflavin concentration in the reaction solution was 0.3 mM, and the horseradish peroxidase concentration was 20 U / mL.

[0031] Most of the cross-linking points in traditional silk fibroin hydrogel are physical cross-linking points, which are easy to slide along the molecular chain during the drying process to produce a large number of crystal structures, which greatly limits its water absorption capacity. Under the irradiation of ultraviolet light, riboflavin generates active oxygen free radicals that can react with tyrosine on the molecular chain of silk fibroin, induce chemical cross-linking of amino grou...

Embodiment 3

[0040] The preparation of embodiment 3 silk fibroin superabsorbent material

[0041] (1) Adjust the concentration of the pure silk fibroin solution in Example 1 to 20 mg / mL with deionized water to obtain an aqueous silk fibroin solution.

[0042] (2) Add riboflavin and horseradish peroxidase solution to the silk fibroin aqueous solution to obtain a reaction solution. The riboflavin concentration in the reaction solution was 0.1 mM, and the horseradish peroxidase concentration was 10 U / mL.

[0043] Most of the cross-linking points in traditional silk fibroin hydrogel are physical cross-linking points, which are easy to slide along the molecular chain during the drying process to produce a large number of crystal structures, which greatly limits its water absorption capacity. Under the irradiation of ultraviolet light, riboflavin generates active oxygen free radicals that can react with tyrosine on the molecular chain of silk fibroin, induce chemical cross-linking of amino grou...

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Abstract

The invention discloses a silk fibroin superabsorbent material and a preparation method thereof. The preparation method comprises the following steps: pouring the reaction solution obtained after uniformly mixing the silk fibroin solution, riboflavin and horseradish peroxidase into a transparent mold, and introducing oxygen into the reaction solution; irradiating the reaction solution with ultraviolet light to form a silk fibroin hydrogel, controlling the temperature of the reaction solution during the irradiation process to be 0-8° C.; The gel is dried to obtain a silk fibroin xerogel; the silk fibroin xerogel is crushed and screened to obtain a silk fibroin superabsorbent material. The preparation method of the present invention can effectively reduce the reaction temperature by cross-linking in a low-temperature environment, so that the formed gel maintains the random coil structure in the solution, thereby effectively limiting the generation of crystal structure and greatly improving the swelling capacity of the material. The prepared silk fibroin superabsorbent material has a high water absorption multiple and a high water retention rate.

Description

technical field [0001] The invention relates to the technical field of superabsorbent materials, in particular to a method for preparing a silk fibroin superabsorbent material and the silk fibroin superabsorbent material prepared by the preparation method. Background technique [0002] Super absorbent material is a kind of super absorbent material, which refers to a substance that can absorb water tens to hundreds of times its own mass. Widely used in baby diapers, women's sanitary napkins and pet pads and other fields. Traditional superabsorbent materials are generally divided into the following two types. One is natural and modified polymer superabsorbent resins. The raw materials are generally starch or cellulose. By grafting hydrophilic functional groups to natural macromolecules In order to achieve the purpose of high water absorption modification. The other is artificial synthetic water-absorbent resins, such as polyvinyl salts, polyvinyl alcohol, polyoxyethylene, et...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J3/12C08J3/24C08L89/00
CPCC08J3/12C08J3/245C08J2389/00
Inventor 卢神州温壮壮姜福建刘海娟刘诗喆邹婷
Owner NANTONG TEXTILE & SILK IND TECH RES INST
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