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Gelatin-based papermaking sizing agent based on hydrogen-bond interaction and preparation method thereof

A technology of hydrogen bonding and sizing agent, applied in papermaking, textiles, papermaking, paper coating, etc., can solve the problems of low physical and mechanical properties, poor water resistance, high cost, etc., to reduce entanglement, improve gel condition, low cost effect

Active Publication Date: 2020-03-24
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, traditional sizing agents often have disadvantages such as high cost, easy pollution, low physical and mechanical properties, and poor water resistance during use.

Method used

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  • Gelatin-based papermaking sizing agent based on hydrogen-bond interaction and preparation method thereof
  • Gelatin-based papermaking sizing agent based on hydrogen-bond interaction and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] 1) Weigh 5g of gelatin into a beaker, add 20mL of deionized water, let it stand for 30 minutes, wait for it to swell fully, put it in a constant temperature water bath: adjust the temperature to 40°C, stir until it is completely dissolved to obtain a gelatin solution;

[0027] 2) Pour the gelatin solution obtained in step 1) into a 50mL silk bottle, add 2g of methacrylic acid monomer and an initiator of 0.1% of the monomer mass, and place it in a UV reaction box for 60min to obtain methacrylic acid modified gelatin emulsion;

[0028] 3) Add 3% sodium lauryl sulfate, 0.1g sodium bicarbonate, and 20mL distilled water into a 250mL three-neck flask, stirring at a speed of 250r / min to dissolve. When heating to 60°C, add a solution of 3% potassium persulfate and 5mL distilled water and 1g of polymerized monomer, and heat up to 80°C for reaction. After the reaction liquid shows obvious exotherm, control the reaction temperature at 80°C, slowly add 9g of polymerized monomer dr...

Embodiment 2

[0031] 1) Weigh 5g of gelatin into a beaker, add 20mL of deionized water, let it stand for 30 minutes, wait for it to swell fully, put it in a constant temperature water bath: adjust the temperature to 45°C, and stir until it is completely dissolved to obtain a gelatin solution;

[0032] 2) Pour the gelatin solution obtained in step 1) into a 50mL silk bottle, add 2g of acrylamide monomer and an initiator of 0.1% of the monomer mass, and place it in a UV reaction box for 60min to obtain an acrylamide-modified gelatin emulsion ;

[0033] 3) Add 3% sodium lauryl sulfate, 0.1g sodium bicarbonate, and 20mL distilled water into a 250mL three-neck flask, stirring at a speed of 250r / min to dissolve. When heating to 60°C, add a solution of 3% potassium persulfate and 5mL distilled water and 1g of polymerized monomer, and heat up to 80°C for reaction. After the reaction liquid shows obvious exotherm, control the reaction temperature at 80°C, slowly add 9g of polymerized monomer dropwi...

Embodiment 3

[0036] 1) Weigh 5g of gelatin into a beaker, add 20mL of deionized water, let it stand for 30 minutes, wait for it to swell fully, put it in a constant temperature water bath: adjust the temperature to 45°C, and stir until it is completely dissolved to obtain a gelatin solution;

[0037] 2) Pour the gelatin solution obtained in step 1) into a 50mL silk bottle, add 2g of methacrylic acid monomer and an initiator of 0.1% of the monomer mass, and place it in a UV reaction box for 45min to obtain methacrylic acid modified gelatin emulsion;

[0038] 3) Add 3% sodium lauryl sulfate, 0.1g sodium bicarbonate, and 20mL distilled water into a 250mL three-neck flask, stirring at a speed of 250r / min to dissolve. When heating to 60°C, add a solution of 3% potassium persulfate and 5mL distilled water and 1g of polymerized monomer, and heat up to 80°C for reaction. After the reaction liquid shows obvious exotherm, control the reaction temperature at 80°C, slowly add 9g of polymerized monome...

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Abstract

The invention relates to a synthetic method for preparing an environment-friendly papermaking sizing agent from gelatin extracted from waste leather scraps. According to the method, the gelatin is modified by adopting monomers capable of forming hydrogen bonds with the gelatin and polymers(such as acrylic acid, methacrylic acid, acrylamide, methacrylamide, N-hydroxymethyl acrylamide and the like)of the monomers; and blending and toughening with polymerization emulsion of an elastomer(such as ethyl acrylate, butyl acrylate, n-octyl acrylate, isooctyl acrylate, isooctyl methacrylate and dodecylmethacrylate)to obtain the papermaking sizing agent which is low in cost, simple in process and capable of greatly improving the water resistance and physical and mechanical properties of paper.

Description

technical field [0001] The invention relates to the field of modification of gelatin and preparation of corrugated paper sizing agent, in particular to a preparation method of corrugated paper surface sizing agent. Background technique [0002] Our country is a big country of tannery. According to reports, my country produces up to 1.4 million tons of leather solid waste every year. These wastes contain more than 90% collagen, and the gelatin extracted from it has good biocompatibility, easy biodegradability, and film-forming properties, so its application prospect is good. The commonly used ways to modify gelatin are chemical cross-linking and graft modification, but due to the limited number of groups that can be cross-linked or graft-modified on the gelatin chain, its modification is limited. [0003] With the continuous progress of society and the continuous improvement of people's living standards, people's demand for paper is increasing, and their quality requirement...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H21/16D21H19/20C08F289/00C08F220/06C08F220/18C08F220/54C08H1/06
CPCD21H21/16D21H19/20C08F289/00C08H1/06C08F220/06C08F220/54
Inventor 王学川刘雲张慧洁刘新华韩庆鑫朱兴
Owner SHAANXI UNIV OF SCI & TECH
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