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Preparation method of straw-base composite water-absorbing material

A water-absorbing material and straw technology, which is applied in the field of preparation of composite water-absorbing materials, can solve the problems of skin irritation, high manufacturing cost of superabsorbent resin, and limited application range, etc., and achieve strong salt resistance and good water absorption and water retention performance.

Active Publication Date: 2016-08-17
SUZHOU COSMETIC MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, superabsorbent resins have high manufacturing costs, are prone to pollute the environment, and can cause irritation to the skin when they are in direct contact with the skin, which limits their application range.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] A method for preparing a composite water-absorbing material based on straw, comprising the following steps:

[0020] Step 1, take fresh stalks, dry them in the sun, and crush them into fine powder;

[0021] Step 2, adding the fine powder of step 1 to the phosphate buffer solution containing 1wt% compound enzyme, heating and fumigation to obtain activated straw fine powder;

[0022] Step 3, in parts by weight, 10 parts of fine powder obtained in step 2, 2 parts of potassium persulfate, 1 part of silane coupling agent, 5 parts of water, 2 parts of dodecylsulfonated starch, polyglycerol castor oil 1 part of the acid ester was mixed and reacted at 70°C to obtain a graft;

[0023] Step 4, in parts by weight, add 3 parts of lecithin, 2 parts of gelatin, 1 part of glycerol triacetate, and 3 parts of n-butyl titanate to the graft obtained in step 3, add 10wt% NaOH solution dropwise, and stir , react at 40°C;

[0024] In step 5, the reactant in step 4 is filtered out, washed ...

Embodiment 2

[0028] A method for preparing a composite water-absorbing material based on straw, comprising the following steps:

[0029] Step 1, take fresh stalks, dry them in the sun, and crush them into fine powder;

[0030] Step 2, adding the fine powder of step 1 to the phosphate buffer solution containing 2wt% compound enzyme, heating and fumigation to obtain activated straw fine powder;

[0031] Step 3, in parts by weight, 13 parts of fine powder obtained in step 2, 5 parts of potassium persulfate, 2 parts of silane coupling agent, 8 parts of water, 4 parts of dodecylsulfonated starch, polyglycerol castor oil 3 parts of acid ester were mixed and reacted at 75°C to obtain a graft;

[0032] Step 4, in parts by weight, add 4 parts of lecithin, 4 parts of gelatin, 2 parts of glycerol triacetate, and 4 parts of n-butyl titanate to the graft obtained in step 3, add 13wt% NaOH solution dropwise, and stir , react at 40°C;

[0033] In step 5, the reactant in step 4 is filtered out, washed ...

Embodiment 3

[0037] A method for preparing a composite water-absorbing material based on straw, comprising the following steps:

[0038] Step 1, take fresh stalks, dry them in the sun, and crush them into fine powder;

[0039] Step 2, adding the fine powder of step 1 to the phosphate buffer solution containing 4wt% compound enzyme, heating and fumigation to obtain activated straw fine powder;

[0040] Step 3, in parts by weight, 17 parts of fine powder obtained in step 2, 5 parts of potassium persulfate, 3 parts of silane coupling agent, 9 parts of water, 5 parts of dodecylsulfonated starch, polyglycerol castor oil 3 parts of acid ester were mixed and reacted at 80°C to obtain a graft;

[0041] Step 4, in parts by weight, add 5 parts of lecithin, 4 parts of gelatin, 2 parts of glycerol triacetate, and 4 parts of n-butyl titanate to the graft obtained in step 3, add 17wt% NaOH solution dropwise, and stir , react at 45°C;

[0042] In step 5, the reactant in step 4 is filtered out, washed ...

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Abstract

The invention provides a preparation method of a straw-base composite water-absorbing material. The method comprises the following steps: taking fresh straws, airing, pulverizing into fine powder, adding the fine powder into a composite-enzyme-containing phosphate buffer solution, heating for fumigation, mixing the activated straw fine powder, potassium persulfate, a silane coupling agent, water, dodecyl-sulfonate-modified starch and polyglycerol ricinoleate, carrying out reaction at 70-90 DEG C to obtain a graft, adding lecithin, gelatin, glyceryl triacetate and n-butyl titanate into the graft, dropwisely adding a NaOH solution, stirring, and carrying out reaction at 40-50 DEG C; and finally, filtering out the reaction product, cleaning and drying to obtain the water-absorbing material. The maximum water absorbency of the water-absorbing material is 633.33 g / g, the maximum salt absorbency is 133.33 g / g, and the maximum artificial urine absorbency is 133.33 g / g. The water-absorbing material has the advantages of high salt resistance, favorable water absorptivity and favorable water retention property.

Description

technical field [0001] The invention belongs to the technical field of water-absorbing materials, and in particular relates to a preparation method of a composite water-absorbing material using straw as a base material. Background technique [0002] Superabsorbent Polymers (SAP for short) refers to a slightly cross-linked polymer that can quickly absorb liquid water dozens or even thousands of times its own mass through hydration to form a gel and has good water retention. Polymer is a new type of chemical preparation developed in the past ten years. Commonly used water-retaining agents include solid and liquid, and solids are powder, flake and fiber, and powder is the most widely used. Because most of them are high polymers synthesized by polymerization of low molecular substances or made by chemical reactions of high molecular compounds, they are called superabsorbents (Lin Runxiong, Huang Yuli, Lu Yijun, 1998). It has the ability to absorb and store water, and it can qu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L87/00C08L89/00C08K5/103C08G81/00
CPCC08G81/00C08L87/00C08L89/00C08K5/103
Inventor 金仲恩全春兰张帆喻国贞欧阳智琨陈晋纳
Owner SUZHOU COSMETIC MATERIALS
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