分散型阳离子聚丙烯酰胺的合成与应用

李德品; 胡惠仁; 梁聪慧

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分散型阳离子聚丙烯酰胺的合成与应用

Synthesis and Application of Dispersion Cationic Polyacrylamide

收稿日期：

DOI：10.11980/j.issn.0254-508X.2013.01.006

关键词: 阳离子聚丙烯酰胺（CPAM）分散聚合表观黏度助留助滤

Key Words:cationic polyacrylamide(CPAM) dispersion polymerization apparent viscosity retention and drainage

基金项目:本研究得到国家十二五科技支撑项目(项目编号：2011BAC11B04)和天津市科技创新体系及条件平台建设计划项目(编号：10SYSYJC28000)的资金支持。

作者	单位
李德品	天津科技大学天津市制浆造纸重点实验室,天津,300457
胡惠仁	天津科技大学天津市制浆造纸重点实验室,天津,300457
梁聪慧	天津科技大学天津市制浆造纸重点实验室,天津,300457

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摘要:以丙烯酰胺(AM)和季铵盐型阳离子单体为反应单体,在(NH4)2SO4水溶液中,用分散聚合法合成了固含量高、黏度低、稳定性好、溶解速度快的分散型阳离子聚丙烯酰胺(CPAM)乳液。对分散剂、阳离子单体、引发剂种类进行了选择,探讨了降低聚合过程中表观黏度的措施，并对产物进行红外光谱(FT-IR)、激光粒度仪分析。结果表明，合成CPAM的适宜方案为：以聚甲基丙烯酰氧乙基三甲基氯化铵(PDMC)为分散剂、甲基丙烯酰氧乙基三甲基氯化铵(DMC)为阳离子单体、偶氮二异丁基脒二盐酸盐(V50)为引发剂，加入少量的Na₂SO₄和(NH₄)₂SO₄降低表观黏度。将制得的CPAM用作文化用纸抄造过程中的助留助滤剂,在适宜CPAM用量、CPAM与浆料的接触时间、搅拌速度等工艺参数下，浆料的填料留着率从未添加CPAM时的23.4%提高到73.7%,打浆度从39°SR降低至25°SR。

Abstract:Cationic polyacrylamide (CPAM) emulsion with high solid content, low viscosity, good stability and rapid dissolution was prepared from acrylamide (AM) and quaternary ammonium cationic monomer by dispersion polymerization in an aqueous solution of ammonium sulfate. Different dispersing agents, cationic monomers and initiators for polymerization reaction were studied, and many methods to reduce the apparent viscosity were tried. Fourier transform infrared spectroscopy (FT-IR) and laser particle size analyzer were used to analyse the properties of the emulsion. The results showed that, the emulsion had the superior properties when poly (methacryloyloxyethyl trimethyl ammonium chloride) (PDMC), methacryloyloxyethyl trimethyl ammonium chloride (DMC) and 2,2′-azobis (2-methylpropionamide) dihydrochloride (V50) were used as dispersing agent, cationic monomer and initiator, respectively, and sodium sulfate (Na₂SO₄) was used to reduce the apparent viscosity. The product CPAM was applied in fine paper production as retention and drainage aids. The application parameters such as dosage of CPAM, retention time and mixing rate were optimized. The filler retention was improved from 23.4% to 73.7% and beating degree was reduced from 39°SR to 25°SR under optimum condition.

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