【摘要】 为提高聚丙烯酰胺环氧氯丙烷(PAE)增加湿强度的效果和减少有机氯污染,研究阳离子树脂PAE与无机阴离子助剂膨润土组成二元体系对纸张湿强度的影响,采用测定浆料细小组分留着率和保水值(WRV)、扫描电镜(SEM)观察、浆料电动电势(Zeta电位)和X射线光电子能谱(XPS)分析等手段,进一步分析二元体系增湿强度机理。结果表明:浆料中添加0.75%PAE(相对于绝干浆)时,加入0.5%膨润土,纸张强度最好,干抗张指数、湿抗张指数和耐折度较空白纸张分别增加了38%、2833%和281%,较单加PAE的纸张分别增加了19%、32%、60%。PAE-膨润土二元体系可提高浆料细小组分的留着率和WRV。通过Zeta电位分析可知,PAE-膨润土体系的浆料中存在静电吸附作用;SEM分析可知体系能在纸张表面形成致密网络结构;通过AFM分析得出,膨润土是纳米级的片状材料且呈链圈状分布。通过XPS分析可知,二元体系的纸张保留更多的C=O、COOR和—OH,其可增加PAE和细小纤维的留着。更多还原

【Abstract】 In order to obtain higher wet strength, reduce PAE dosage and chlorine pollution, we studied the effect of the binary system of cationic resin PAE and inorganic anion agent bentonite on the wet strength of paper, and analyzed the wetting strength mechanism of the binary system by the retention rate and water retention value(WRV) of the fines of the slurry, SEM observation, Zeta potential and XPS analysis. When dosage of PAE and bentonite were 0.75% and 0.75%, respectively, the paper strength was the best; compared with the control paper, the dry tensile index, wet tensile index and folding endurance were increased by 38%, 2833% and 281%, respectively; compared with PAE paper increased by 19%, 32% and 60%, respectively. The PAE/bentonite binary system increased the retention of the fines and fillers and WRV. Electrostatic adsorption existed in the slurry of PAE/bentonite system by Zeta potential analysis. The system could form dense network structure on paper surface by SEM. Bentonite was a nano-scale plate material and was distributed in a chain shape by AFM. The paper retained more C=O, COOR and —OH PAE sheet, which increased the retention of PAE and fine fibers by XPS analysis.更多还原