羧甲基淀粉的制备及其用作纸张增强剂的研究

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关键词：马铃薯淀粉；羧甲基淀粉；取代度；造纸助剂中图分类号： TS727+ . 2 文献标识码：A DOI：10. 11980/j. issn. 0254-508X. 2025. 05. 012

Study on the Preparation of Carboxymethyl Starch and Its Application as Paper Strength Agent

WANG Rongyuan1，2，3 HONG Mengna1 BAI Yuanyuan2，3，* LIU Qunhua2，3 DU Qi2，3 YANG Yang2，3 LIU Wen2，3，* （1. School of Light Industry and Enginering，South China University of Technology，Guangzhou，Guangdong Province，510640； 2. China National Pulp and Paper Research Institute Co.，Ltd.，Beijing，100102； 3. National Engineering Lab for Pulp and Paper，Beijing，100102） （*E-mail：baiyuanyuan@cnppri. com；liuwen0412@126. com）

Abstract：In this study，potato starch，sodium hydroxide，and monochloroacetic acid were used to prepare carboxymethyl starch with a de‐ gree of substitution ranging from 0. 041 to 0. 973 in ethanol medium. The effects on the degree of substitution of carboxymethyl starch were investigated，including ethanol volume fraction，alkalization temperature and carboxymethyl starch with different degrees of substitution on paper properties. The results showed that under low degree of substitution，the carboxymethylation process mainly occurred in the amor‐ phous region on the surface of starch granules. As the degree of substitution increased，the carboxymethylation process mainly occurred in the crystallization region inside the starch granules. It was found that the addition of carboxymethyl starch with a degree of substitution of 0. 419 had the best reinforcement effect on paper. The tensile strength，burst strength，and tear strength of the paper were 16.5MPa ， 63.3kPa and 136 mN. Compared with the paper without carbaxymethgl starch，the tensile strength，bursh strength，and tear strength had increased by 31. 0% ， 15.3% ，and 43.5% ，respectively.

Key words：potato starch；carboxymethyl starch；degree of substitution；papermaking additives

添加造纸助剂是改善纸张机械性能的主要方法之一，常见的造纸助剂包括羧甲基纤维素、阳离子淀粉、羧甲基壳聚糖等。（剩余17236字）