CPAM的合成及CPAMCMC二元纸张增强体系的初步研究

Synthesis of CPAM and binary paper strengthening system of CPAM/CMC

该文主要研究阳离子聚丙烯酰胺 (CPAM)与羧甲基纤维素 (CMC)二元增强体系对纸张的增强效果 .通过控制CPAM的合成条件 ,加入CMC ,研究CPAM CMC二元体系的添加量、浆料初始pH值等因素对二元增强体系增加纸张强度的影响 ,找出利用CPAM CMC二元体系增加纸张强度的最佳条件 .结果表明 :①该实验采用的合成条件可以较准确地制备一定分子量范围的CPAM ,适于作纸张增干增强剂 ;②合成引发剂用量为 0 3%时制备的CPAM分子量范围为 30 0 0 0 0～ 35 0 0 0 0 ,对纸张的增强效果较好 ;③纸张的各项物理性能都随着CPAM CMC加入量的增加而增长 ,CPAM CMC的比例为 1∶0 6时 ,纸张的增强效果明显 ;④浆料的pH值约为 7 0时 ,CPAM CMC二元体系的增强效果较好 .

This paper mainly describes the effect of the application of the binary paper strengthening system-cation-polyacrylamide (CPAM) and carboxymethyl cellulose (CMC). By controlling the conditions of synthesizing the CPAM and using CMC, the authors tested the effects of the amount of the two substances being used and the initial pH of the pulp on the strength of paper. The purpose of the experiment is to try to find the optimal condition of synthesizing the CPAM and using CPAM/CMC binary system. The results are as follows: (1) the synthetic condition applied in this experiment could make CPAM more accurately within certain molecular weight, and could be applied in the production. (2) As to CPAM with 0.3% synthetic initiator, its molecular weight ranged from 300 000 to 350 000, and had better effects on paper physical properties. (3) The paper physical properties were improved with the input of CPAM/CMC , and when the rate of CPAM/CMC reached 1:0.6, the result was better. (4) When pulp's pH was around 7.0, the effect of CPAM/CMC's paper strength was the best.