壳聚糖、二甲基二烯丙基氯化铵和淀粉接枝共聚物的助滤增强作用研究  

On the drainage adding and strangthening function of chitosan, DMDAAC and starch graft copolymer

作　　者：赵世英[1] 殷宁[1] 

机构地区：[1]北京林业大学材料科学与技术学院,北京100083

出　　处：《中华纸业》2007年第11期56-59,共4页China Pulp & Paper Industry

基　　金：北京林业大学研究生自选课题基金资助

摘　　要：壳聚糖(CS)、二甲基二烯丙基氯化铵(DMDAAC)和可溶性淀粉以硝酸铈铵为引发剂,接枝共聚生成三元聚合物,对其在造纸中的应用进行了研究。主要讨论了产物的粘度和表面电荷对助滤和增强效果的影响,并利用胶体滴定法对共聚物和纤维悬浮液的表面电荷进行测定,确定助剂的适当添加范围。最佳的一个助剂样品反应体系pH3.97,反应温度95℃,反应时间2.5h,粘度478mPa·s,表面电荷0.883mmol/g。当合成样品的用量为0.6%时,能使裂断长提高16.68%,撕裂指数提高35.4%,耐破指数提高12.92%。The ternary polymer was prepared from the graft copolymerization of dimethyl diallyl ammonium chloride （DMDAAC）, chitosan and soluble starch, which was initiated with cerium ammonium nitrate（CAN） as initiator and its application in papermaking was explored. The paper mainly discussed the influence of the viscosity and surface cationic charge of the graft copolymer on the drainage and strengthening effect and collcoid titration was used to measure the surface charge of graft copolymer and fibrous suspension and the appropriate addition range of the additives was calculated. The reaction system of the most optimal additive was pH value 3.97, reaction temperatrue 95 ℃, reaction time 2.5h, viscosity 478mPa· s, surface cationic charge 0.883mmol/g. When the charge of the graft copolymer was 0.6%, the breaking length was increased by 16.68%, the tearing index was increased by 35.4% and the bursting index was increased by 12.92%.

关 键 词：壳聚糖 接枝共聚 电荷 胶体滴定 

分 类 号：TS727.2[轻工技术与工程—制浆造纸工程]