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Paper strengthening agent prepared by taking polysaccharide as raw material and preparation method of paper strengthening agent

A technology of paper strengthening agent and polysaccharide, which is applied in the fields of paper, fiber raw material processing, pigment/shading agent addition, etc., can solve the problems of complex preparation process of nanocrystalline cellulose, long degradation time, difficult industrialization, etc., and it is easy to achieve reaction conditions. The effect of realization, easy availability of raw materials and efficient utilization

Active Publication Date: 2017-02-22
BEIJING FORESTRY UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The preparation process of nanocrystalline cellulose in the above-mentioned patent is complicated, the pollution generated by the acid hydrolysis method is large, the degradation time and cost are high by cellulase, and the subsequent 2,2,6,6-tetramethyl-1-piperone The modification method with pyridine oxygen as the medium is expensive and difficult to industrialize

Method used

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  • Paper strengthening agent prepared by taking polysaccharide as raw material and preparation method of paper strengthening agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Embodiment 1: Take a certain mass of polysaccharide powder and distilled water of 1.5 times the weight of the polysaccharide powder and add it to an Erlenmeyer flask, put the bottle into a water bath at 25° C. and stir it with a glass rod. Add 3% sodium hydroxide to adjust the pH to 9.25, and let it stand for 30 minutes. Add 5% polysaccharide powdered trimesic acid by weight, continue to adjust the pH to 9.25, and react for 2.5 hours. Finally, add 0.1 mol / L hydrochloric acid to adjust the pH to 6.5, and filter. The obtained product was washed three times with ethanol, and dried at room temperature to obtain a paper strengthening agent. After testing, the carboxyl content is 58mmol / Kg.

Embodiment 2

[0017] Example 2: Add a certain amount of polysaccharide powder and distilled water of 1.5 times the weight of the polysaccharide powder into an Erlenmeyer flask, put the bottle into a water bath at 25° C. and stir with a glass rod. Add 3% sodium hydroxide to adjust the pH to 9.25, and let it stand for 30 minutes. Add 8% polysaccharide powdered trimesic acid by weight, continue to adjust the pH to 9.25, and react for 2.5 hours. Finally, add 0.1 mol / L hydrochloric acid to adjust the pH to 6.5, and filter. The obtained product was washed three times with ethanol, and dried at room temperature to obtain a paper strengthening agent. After testing, the carboxyl content is 67mmol / Kg.

Embodiment 3

[0018] Embodiment 3: Take a certain mass of polysaccharide powder and distilled water of 1.5 times the weight of the polysaccharide powder and add them into a conical flask, put the bottle into a water bath at 25° C. and stir with a glass rod. Add 3% sodium hydroxide to adjust the pH to 9.25, and let it stand for 30 minutes. Add 11% polysaccharide powdered trimesic acid by weight, continue to adjust the pH to 9.25, and react for 2.5 hours. Finally, add 0.1 mol / L hydrochloric acid to adjust the pH to 6.5, and filter. The obtained product was washed three times with ethanol, and dried at room temperature to obtain a paper strengthening agent. After testing, the carboxyl content is 72mmol / Kg.

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Abstract

The invention provides a paper strengthening agent prepared by taking polysaccharide as a raw material and a preparation method of the paper strengthening agent. The preparation method comprises the steps that 1 part by weight of polysaccharide powder and 1.5 parts by weight of water are mixed, sodium hydroxide of which the weight accounts for 3 wt% of that of the polysaccharide powder is added, and the materials are placed at room temperature for 30 minutes; trimesic acid of which the weight accounts for 5 wt%-14 wt% of that of the polysaccharide powder is added, the pH value is regulated to be 9.25, and reacting is conducted for 2.5 hours; the pH value is regulated to be 6.5 by adding hydrochloric acid; filtering is conducted; obtained filter residues are washed with ethyl alcohol and then dried, and the paper strengthening agent is obtained. The polysaccharide is taken as the raw material, and therefore efficient utilization of the polysaccharide resource is achieved.

Description

technical field [0001] The invention relates to a paper strengthening agent for papermaking technology, in particular to a paper strengthening agent and a production method thereof. Background technique [0002] With the rapid growth of my country's economy and the continuous improvement of people's living standards, people's demand for paper is increasing, and the quality requirements for paper products are getting higher and higher. At the same time, my country's papermaking resources are scarce, and people pay more and more attention to the recycling of waste paper. However, repeated recycling of paper will affect its strength. However, due to the shortage of timber resources in our country, grass fibers are mostly used, and the strength of grass fibers is not as good as that of wood fibers. Adding paper strengthening agent in the papermaking process can effectively improve this situation, can effectively improve the paper-making performance of wheat straw pulp and waste...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H21/28D21H17/24C08B37/00
CPCC08B37/0087D21H17/24D21H21/28
Inventor 宋先亮孙琦
Owner BEIJING FORESTRY UNIVERSITY