作　　者： ; ; ; (王才友）;

机构地区： 山东轻工业学院

出　　处： 《中国造纸》 2004年第12期22-25,共4页

摘　　要： 以硝酸铈铵 (CAN)为引发剂 ,对壳聚糖 (CS)和丙烯酰胺 (AM)及二甲基二烯丙基氯化铵(DMDAAC)的三元接枝共聚反应进行了研究 ,讨论了反应条件对合成产品增强效果的影响。其最佳合成条件为 :反应温度 40℃ ,单体滴加时间 0 5h ,总反应时间 5h ,CAN浓度为 0 4mmol/L ,m(CS) :m(AM) :m(DMDAAC) =1∶7 52∶0 48,反应体系pH值为 1 8,分子质量调节剂浓度 3 0 0mmol/L。当合成产物用量为 0 6 %时 ,可使纸张的裂断长增加 1 4 60m ,撕裂指数提高 1 5 5 %。与壳聚糖 -AM二元接枝共聚物相比 ,具有用量小、效果好的优点。 The graft copolymerization of acryamide (AM) and dimethyl diallyl ammonium chloride (DMDAAC) onto chitosan, which was initiated by using cerium ammonium nitrate (CAN) as initiator was studied. The graft copolymer was used as paper dry strengthening agent. The application results showed that the best copolymerization condition was that reaction time at 40℃ was 5 h, dripping time of monomer was 0.5 h, the concentration of CAN was 0.4 mmol/L, m(CS):m(AM):m(DMDAAC)=1∶7.4∶0.48, the pH va lue of reaction system was 1.83, the dosage of NaHSO_3 was 3.00 mmol/L. The breaking length and tear index of paper was respectively increasedby 1460m and 15.5% for NBKP when the dosage of the graft copolymer was 0.6%. The strengthening effect of this copolymer was much better than that of the unmodified chitosan.

关 键 词： 壳聚糖 丙烯酰胺 接枝共聚 纸张增强剂

领　　域： [轻工技术与工程]