摘要
为了提高气相二氧化硅在水性体系分散的性能,以N-乙烯基吡咯烷酮(NVP)和甲基丙烯酸二甲基氨基乙酯(DMAEMA)为单体,采用自由基聚合合成VP-DM聚合物分散剂,并将其用于水性气相二氧化硅分散体的制备。通过粒径、zeta电位、流变等测试表征分散体的性能,研究聚合物的单体比例、重均分子量(M_(w))对分散体的影响规律。结果表明,当n(NVP)∶n(DMAEMA)=3∶2,重均分子量=9000~10000g/mol时,VP-DM聚合物对气相二氧化硅的分散性能表现最佳。
To enhance the dispersion performance of fumed silica in aqueous systems,a VP-DM polymer dispersant via free radical polymerization using N-vinylpyrrolidone(NVP)and dimethylaminoethyl methacrylate(DMAEMA)as monomers was synthesized,the dispersant was then applied to prepare aqueous fumed silica dispersions.The performance of the dispersions was characterized through particle size analysis,zeta potential measurement,and rheological testing,with a focus on investigating the effects of monomer ratio and weightaverage molecular weight(M_(w))of the polymer.The results demonstrated that when the molar ratio of NVP to DMAEMA was 3:2 and the weight-average molecular weight(M_(w))ranged from 9,000 to 10,000 g/mol,the VP-DM polymer exhibited optimal dispersion performance for fumed silica.
作者
郭永江
王宇
陈占
GUOYong-jiang;WANG Yu;CHEN Zhan(Shanghai Yuking Water Soluble Material Tech Co.,Ltd.,Shanghai 201318,China)
出处
《精细与专用化学品》
2025年第7期34-37,共4页
Fine and Specialty Chemicals
关键词
气相二氧化硅
分散剂
水性
自由基聚合
fumed silica
dispersants
aqueous
free radical polymerization
作者简介
郭永江(1993-),男,本科,主要从事水性涂料分散剂的合成及应用研究。
