无机盐离子对团聚剂溶液性质的影响机制  

Mechanism of Inorganic Cations on the Properties of Agglomeration Solution

作　　者：洪迪昆 刘亮[1] 郭欣[1] 

机构地区：[1]煤燃烧国家重点实验室(华中科技大学),湖北省武汉市430074

出　　处：《中国电机工程学报》2016年第16期4363-4368,4520,共6页Proceedings of the CSEE

基　　金：国家重点基础研究发展计划项目(973项目)(2013CB 228504)~~

摘　　要：在化学团聚技术中,无机盐离子对团聚剂性质的影响相当重要。采用分子动力学模拟方法研究了Na+、Mg^(2+)和Ca^(2+)对部分水解疏水改性聚丙烯酰胺(HMHPAM)溶液性质的影响机制。通过回旋半径以及径向分布函数表征方法分析阳离子对HMHPAM的水溶性以及溶液黏度的影响。回旋半径结果表明盐离子降低了HMHPAM溶液的黏度,其中Na+、Mg^(2+)和Ca^(2+)对溶液黏度影响的程度为Ca^(2+)>Mg^(2+)>Na+。阳离子水合作用结果表明Mg^(2+)的水合半径最小,其吸水能力最强,对HMHPAM的水溶性影响最大。径向分布函数分析显示Ca^(2+)可以进入羧酸根基团的第1层水合层,并与之直接相互作用,静电屏蔽作用最大,对溶液黏度影响最大;Na+对HMHPAM溶液的影响最小,只能起到微弱的静电屏蔽作用。The effect of inorganic cations on the features of agglomeration solution is very important during the process of chemical agglomeration. Molecular dynamics simulation method was used to study mechanism of Na＋, Mg^（2＋） and Ca^（2＋） on the properties of partially hydrolyzed hydrophobically modified polyacrylamide（HMHPAM） solution. The capacity of water absorption and viscosity of HMHPAM solution were analyzed by the characterization methods of radius of gyration and radial distribution function. Result of radius calculation clearly showed that the viscosity of HMHPAM solution was reduced by the addition of cations and the influence level of cations on HMHPAM solution was Ca^（2＋） Mg^（2＋） Na＋. The results of cation hydration showed that the hydrated radius of Mg^（2＋） was the smallest, its capacity of water absorption was the strongest and so the water solubility of HMHPAM was greatly affected by Mg^（2＋）. The results of radial distribution function showed that Ca^（2＋） could enter the first hydration shell of acrylic anions and interact with acrylic anions directly. It plays a strong effect on electrical shielding. So Ca^（2＋） has the greatest impact on the viscosity of the HMHPAM solution. While the influence of Na＋ on HMHPAM solution is minimal, it can only play a weak effect on electrical shielding.

关 键 词：PM_(2.5) 化学团聚 无机盐离子 分子动力学 部分水解疏水改性聚丙烯酰胺 黏度 

分 类 号：TM[电气工程]