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Method for preparing scrap leather industrial gelatine hydrolyzed collagen based papermaking sizing agent

A technology for hydrolyzing collagen and collagen is applied in the field of preparation of gelatin hydrolyzed collagen-based papermaking sizing agent in waste skin industry, can solve the problems of limited application, low mechanical strength, poor water resistance, etc., and achieves improved sizing performance, reduced Production cost, the effect of improving the sizing effect

Active Publication Date: 2015-05-20
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the fatal shortcomings of collagen, such as poor water resistance and low mechanical strength, greatly limit its application in paper sizing. In view of the above defects, this paper adopts the method of introducing hydrophobic monomers into collagen to modify it. treatment to enhance its water resistance and mechanical strength

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A preparation method of industrial gelatin hydrolyzed collagen-based papermaking sizing agent, comprising the steps of:

[0021] Step 1: Weigh 10g of industrial gelatin, add 100mL of water to fully swell, adjust the temperature to 45°C, pH to 7.5, add 0.55g of papain, react for 2 hours, and heat up to 90°C to obtain collagen hydrolyzate;

[0022] Step 2: Weigh 2 g of maleic anhydride and dissolve it in 20 mL of distilled water, add maleic anhydride aqueous solution and 6% sodium carbonate solution with a mass concentration of 6% to the reaction system dropwise under stirring, and maintain the pH between 8.5 and 9 After reacting for 3 hours, it was neutralized to pH 7 with 2mol / L hydrochloric acid to obtain maleic anhydride collagen ester;

[0023] Step 3: Heat up the maleic anhydride collagen ester to 75°C under stirring, adjust the pH to about 5, add a mixture of 5g styrene monomer and 5g ethyl acrylate monomer, pre-emulsify for 30min, and then slowly 0.6 g of initiat...

Embodiment 2

[0025] A preparation method of industrial gelatin hydrolyzed collagen-based papermaking sizing agent, comprising the steps of:

[0026] Step 1: Weigh 10g of industrial gelatin, add 100mL of water to fully swell, adjust the temperature to 45°C, pH to 7.5, add 0.1g of trypsin, react for 2 hours, heat up to 90°C to obtain collagen hydrolyzate;

[0027] Step 2: Weigh 2 g of alkenyl succinic anhydride and dissolve it in 20 mL of distilled water, add alkenyl succinic anhydride aqueous solution and 6% sodium carbonate solution with a mass concentration of 6% to the reaction system dropwise under stirring, maintain the pH between 8.5 and 9, and react After 2 hours, it was neutralized to pH 7 with 2mol / L hydrochloric acid to obtain alkenyl succinic anhydride collagen ester;

[0028] Step 3: Heat up the prepared alkenyl succinic anhydride collagen ester to 75°C under stirring, adjust the pH to about 5, add a mixture of 5g vinyl acetate monomer and 5g acrylic acid monomer, pre-emulsify f...

Embodiment 3

[0030] A preparation method of industrial gelatin hydrolyzed collagen-based papermaking sizing agent, comprising the steps of:

[0031] Step 1: Weigh 10g of industrial gelatin, add 100mL of water to fully swell, adjust the temperature to 45°C, pH to 7.5, add 0.1g of neutral protease, react for 2 hours, and heat up to 90°C to obtain collagen hydrolyzate;

[0032] Step 2: Weigh 5 g of phthalic anhydride and dissolve it in 25 mL of distilled water, add phthalic anhydride aqueous solution and 6% sodium carbonate solution with a mass concentration of 6% to the reaction system dropwise while stirring, and maintain the pH between 8.5 and 9 After reacting for 3 hours, it was neutralized to pH 7 with 2mol / L hydrochloric acid to obtain phthalic anhydride collagen ester;

[0033] Step 3: Heat up the prepared phthalic anhydride collagen ester to 80°C under stirring, adjust the pH to about 4.5, add a mixture of 3g of alkyl (meth)acrylate monomer and 2g of butyl acrylate monomer , pre-emul...

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PUM

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Abstract

The invention relates to a method for preparing a scrap leather industrial gelatine hydrolyzed collagen based papermaking sizing agent. The method comprises the steps: dissolving industrial gelatine in distilled water, adding an enzyme for hydrolyzing, and reacting so as to prepare a collagen hydrolyzate; dissolving an acid anhydride substance in distilled water, dripping the acid anhydride substance solution to the prepared collagen hydrolyzate so as to pre-modify collagen, and reacting so as to prepare an acid anhydride collagen ester; adding a soft monomer and hard monomer mixed solution into the prepared acid anhydride collagen ester, dripping an initiator, carrying out grafting modification on the acid anhydride collagen ester by using soft monomers and hard monomers, and reacting, thereby preparing a white emulsion, namely the collagen based papermaking sizing agent. According to the method, the synthesis of a novel papermaking sizing agent based on scrap leather industrial gelatine hydrolyzed collagen is realized, and the acid anhydride collagen ester is subjected to grafting pre-modification by two kinds of monomers.

Description

technical field [0001] The invention relates to the technical field of resource utilization of leather solid waste and the preparation of a papermaking surface sizing agent, in particular to a preparation method of a gelatin hydrolyzed collagen-based papermaking sizing agent in the waste leather industry. Background technique [0002] With the continuous improvement of people's living standards, the requirements for paper performance are also continuously improved. Papermaking sizing agents can endow paper with excellent properties, such as good water resistance and physical and mechanical properties, which greatly improve the application fields of paper and promote the development of papermaking and printing industries. [0003] my country is a big country in the leather industry. While the leather industry is developing rapidly, it also produces a large amount of leather solid waste. Waste contains a large amount of collagen. Collagen has a unique fibrous structure and go...

Claims

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Application Information

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IPC IPC(8): C08F289/00C08F220/06C08F220/18C08F220/56C08F212/08C08F218/08C08F4/40C08H1/00D21H21/16
Inventor 王学川商跃美任龙芳强涛涛陈橡橡王静文
Owner SHAANXI UNIV OF SCI & TECH