乙二醛接枝网状聚丙烯酰胺的合成及其在纸张增强中的作用  

Preparation of Glyoxal Graft Cationic Polyacrylamide and Its Application of Improving Paper Strength

作　　者：袁朝扬[1] 胡惠仁[1] 周敏[2] 李德品[1] 

机构地区：[1]天津科技大学天津市制浆造纸重点实验室,天津300457 [2]中国制浆造纸研究院,北京100020

出　　处：《纸和造纸》2011年第11期48-52,共5页Paper and Paper Making

摘　　要：首先采用水溶液聚合法合成中间体网状阳离子聚丙烯酰胺(CPAM),然后与乙二醛单体进行接枝共聚制备纸张增强剂乙二醛-聚丙烯酰胺树脂(GPAM),并讨论接枝共聚反应的pH值以及m(乙二醛)/m(CPAM)等因素对GPAM树脂的特性黏度及增强效果的影响。接枝共聚的最佳条件为:pH=7.0～8.0、m(乙二醛)/m(CPAM)=0.3。合成的GPAM用于抄纸实验,讨论其应用条件对增强效果的影响。结果表明,当聚合物用量0.3%、浆料pH值7.0～8.5、助剂作用时间5min时,纸张的干抗张指数提高了24.6%,湿抗张强度达到15.7%。并用红外光谱(FT-IR)对产物的结构进行了表征。Firstly, the cross-linked cationic polyacrylamide （CPAM） with low molecular weight was synthesized through aqueous polymerization. And then the glyoxalated polyacrylamide （GPAM） resin was produced by grafting copolymerization between the CPAM and glyoxal. Various synthesis conditions were discussed and the optimum conditions for copolymer＇s synthesis were as follows： the pH value of reaction 7.0～8.0 and m （glyoxal）/ m （CPAM）=0.3. When GPAM was used in the wet end of papermaking, at the dosage 0.3%, the pulp pH value 7.0～8.5, residence time 5 min , paper dry tensile index increased by 24.6% and the rewet strength retention rate increased to 15.1%. e structure of the resulting products was characterized by FT-IR spectrum.

关 键 词：乙二醛 CPAM GPAM 接枝共聚 纸张强度 

分 类 号：TS727.2[轻工技术与工程—制浆造纸工程]