超分散剂的合成及其在改性无机纳米粉体中的应用  

Synthesis and application effect of hyper-dispersants for modification of inorganic nano-powders

作　　者：李荣付[1] 李笃信[1] 张雁楠[1] 李昆[1] 李仕亮[1] 

机构地区：[1]中南大学粉末冶金国家重点实验室,长沙410083

出　　处：《粉末冶金材料科学与工程》2012年第2期214-221,共8页Materials Science and Engineering of Powder Metallurgy

基　　金：粉末冶金国家重点实验室自主课题(20110924Z)

摘　　要：针对无机纳米粉体的表面改性,以自由基聚合的方法制备以马来酸酐及其单酯物为锚固基团、甲基丙烯酸丁酯(BMA)为溶剂化链、苯乙烯(St)为功能基团的超分散剂SMB。研究不同超分散剂种类、用量以及传统分散剂改性无机纳米粉末的效果,改性前后纳米粉末通过亲油化度、润湿性检测以及SEM和TEM观察以表征其改性效果。研究表明,超分散剂的适宜用量为8%;超分散剂SMB-2改性纳米TiO2粉体的改性效果较好;通过对比超分散剂与传统改性剂钛酸酯、硅烷偶联剂和TDI改性纳米TiO2粉体的改性效果可知,超分散剂的改性效果较佳。In order to study the surface modification of inorganic nano-powders,hyper-dispersant SMB was synthesized using free-radical solution polymerization with maleic anhydride and its monoesters as anchoring group,butyl-methacrylate（BMA） as solventable chain,styrene（St） as functional group.The effects of type and content of hyper-dispersant SMB and traditional dispersant on the modification were investigated.The modified and unmodified nano-powders were analyzed by lipophilic degree and wettability and their microstructures were observed by SEM and TEM.The results exhibit that the optimum amount of hyper-dispersant is mass fraction of 8%;and the nano-TiO2 powder modified by SMB-2 shows an excellent modification effect;by contrast with the traditional dispersants such as titanate,silane coupling agents and TDI modified nano-TiO2 powder,the hyper-dispersant SMB owns better modification effect,reflects the advantage of hyper-dispersants.

关 键 词：超分散剂 无机纳米粉体 表面改性 改性效果 

分 类 号：TQ314.2[化学工程—高聚物工业]