阳离子聚丙烯酰胺反相胶乳的制备及其絮凝性能.kdh.pdfVIP

化 工 进 展 2008 年第 27 卷第 6 期 CHEMICAL INDUSTRY AND ENGINEERING PROGRESS ·887 · 阳离子聚丙烯酰胺反相胶乳的制备及其絮凝性能 惠 泉，刘福胜，于世涛 （青岛科技大学化工学院，山东青岛 266042 ） 摘 要：以丙烯酰胺和甲基丙烯酰氧乙基三甲基氯化铵为单体，通过反相乳液聚合法制备了絮凝性能优异的阳离 子聚丙烯酰胺反相胶乳。考察了乳化剂浓度、引发剂浓度、单体浓度及阳离子度对聚合物分子量和粒子粒径的影 响，并研究了污泥 pH 值、污泥温度和聚合物用量等条件对絮凝性能的影响。得到的较佳条件是：乳化剂质量分 数7.3% ，引发剂质量分数0.02% 、单体质量分数45% 、阳离子度25% ，在上述较佳条件下所得聚合物的黏均分子 量为339.2 万，粒子粒径均低于70 nm；污泥pH 值为5 ～6 ，聚合物用量为0.057%的条件下污泥的絮凝率达62.2% ， 脱水率达82%。 关键词：阳离子聚丙烯酰胺；丙烯酰胺；反相胶乳；絮凝性能 中图分类号：O 632.6 文献标识码：A 文章编号：1000 –6613 （2008 ）06 –0887 –05 Preparation and flocculating performance of inverse emulsion of cationic polyacrylamide HUI Quan ，LIU Fusheng ，YU Shitao (College of Chemical Engineering，Qingdao University of Science and Technology ，Qingdao 266042，Shandong, China) Abstract: Cationic polyacrylamide was prepared by inverse emulsion copolymerization using acrylamide (AM) and methacryloyloxyethyltrimethyl ammonium chloride (DMC) as monomers. The influences of the factors, such as emulsifier concentration, initiator concentration, monomer concentration and cationic degree, on the molecular weight and particle size of polymer were investigated. The effects of pH and temperature of waste water and polymer dosage on flocculating results were studied in flocculating experiment. The obtained optimum conditions were emulsifier weight fraction 7.3%, initiator weight fraction 0.02%, monomer weight fraction 45% and cationic degree 4 25%. Under the above conditions ，the m