PAE-SA二元体系对混合废纸增强效果及机理探究

被引：4

作者：

类延豪

白媛媛

姚春丽

机构：

[1] 北京林业大学材料科学与技术学院

来源：

北京林业大学学报 | 2017年 / 39卷 / 06期

关键词：

海藻酸钠; 聚酰胺多胺环氧氯丙烷; PAE-SA二元体系; 废纸增强机理;

D O I：

10.13332/j.1000-1522.20170079

中图分类号：

TS727 [辅助物料];

学科分类号：

082201 ; 082903 ;

摘要：

选用海藻酸钠(SA)作为废纸纤维增强助剂与聚酰胺多胺环氧氯丙烷(PAE)组成二元体系,研究PAE及PAE-SA二元体系对废纸的增强效果,发现PAE-SA二元体系对废纸增强效果显著,明显优于PAE,且可降低PAE的用量,起到环保作用。通过PAE、SA、PAE-SA二元体系的膜红外谱图分析,扫描电镜和原子力显微镜对废纸表面微观形态的观察,元素含量分析以及纸浆细小组分留着率的测定,探究PAE-SA二元体系的增强机理。结果表明:单独添加PAE时,0.8%PAE对废纸增强效果最佳,干强指数比空白增加17.11%,湿强指数比空白增加1 500.00%;添加0.8%PAE+0.4%SA时,干强指数、湿强指数相对于单加0.8%PAE依次增加26.65%、81.25%,且耐破度、撕裂度均有显著增强。通过机理探究发现:PAE与SA两者之间不发生反应,在协同作用过程中主要依靠静电吸附和膜包覆,通过增加纤维对PAE的吸附,增加PAE的自交联及与纤维的共交联,从而增加纤维对细小组分的吸附及纤维间的结合面积,进而增强废纸的性能。

引用

页码：123 / 130

页数：8

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