疏水改性聚丙烯酰胺的制备及其对难沉降尾矿的絮凝性能研究  

Flocculation Properties of Hydrophobically Modified Polyacrylamides for Tailing Slurry with Difficult Sedimentation

作　　者：王红[1] 朱丽娜[2] 孙彦琳[2] 

机构地区：[1]昆明理工大学理学院,云南昆明650500 [2]昆明理工大学化学工程学院,云南昆明650500

出　　处：《昆明理工大学学报（自然科学版）》2013年第5期101-105,共5页Journal of Kunming University of Science and Technology(Natural Science)

基　　金：国家自然科学基金(51163009);云南省自然科学基金(2009CD031)

摘　　要：采用水溶液共聚法,以甲基丙烯酸甲酯和丙烯酸丁酯为疏水单体,以K2S2O8—NaHSO3氧化还原体系为引发剂,制备了疏水改性型聚丙烯酰胺,探讨了改性单体用量对改性聚丙烯酰胺的分子量、不溶物含量、溶解速率等性能的影响规律,并对其在两种难沉降尾矿中的絮凝效果进行了评价.研究结果表明:疏水改性聚丙烯酰胺对不同类型的难沉降尾矿浆表现出不同的絮凝效果.The hydrophobically modified polyacrylamides （PAM） are prepared by water solution free radical co- polymerization, which uses butyl acrylate （BA） and methyl methacrylate （MMA） as hydrophobic monomers, and K2S2Os--NaHSO3 as initiators. The influences of hydrophobic monomer content on the molecular weight, in- soluble fraction and dissolution rate of PAM are investigated. The flocculation effects of PAMs for two kinds of tailing slurry with difficult sedimentation feature are also evaluated. The resuhs show that different flocculation properties of hydrophobically modified PAMs can be obtained according to different kinds of tailing slurry.

关 键 词：聚丙烯酰胺 疏水改性 絮凝性能 尾矿浆 

分 类 号：TQ317[化学工程—高聚物工业]