摘要
选择九水合硅酸钠和聚丙烯酰胺(PAM)作为分散剂,通过激光粒度分析仪对纳米颗粒的分散稳定性进行评价,红外光谱仪对分散剂在颗粒表面的吸附状态进行识别.发现九水合硅酸钠和聚丙烯酰胺结合起来使用可以发挥协同效应,从而显著改善纳米SiO2颗粒在水溶液中的分散稳定性,而且当九水合硅酸钠和聚丙烯酰胺这两种分散剂的添加量相同时,先添加九水合硅酸钠后添加聚丙烯酰胺,与先添加聚丙烯酰胺后添加九水合硅酸钠相比,纳米颗粒的分散稳定性有所提高.
Sodium silicate nanahydrate and PAM were selected as dispersants to evaluate the dispersive stability of nanoparticles through a diffraction-based laser granulometric analyzer. An IR spectrometer was used to identify the adsorption state of dispersant in the surface of nanoparticles. The results indicated that the combination of sodium silicate nanahydrate with PAM can play the role of synergistic reaction to improve effectively the dispersive stability of SiO2 nanoparticles in aqueous solution. It was found that adding the sodium silicate nanahydrate before PAM is better than adding them in reverse order for dispersive stability, if the amounts of both additions are the same.
出处
《东北大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2007年第5期680-682,695,共4页
Journal of Northeastern University(Natural Science)
基金
国家"十五"科技攻关项目(2001BA31OA09)
作者简介
王毅（1967-），女，辽宁本溪人，东北大学讲师，博士后研究人员；
王恩德（1957-）．男，辽宁盖州人，东北大学教授，博士生导师．Correspondent：WANG En—de．E-mail：wnd@mail．neu．edu．cn
