单分散氟烷基改性双疏SiO_2球的制备  

Preparation of Monodispersed Fluoroalkyl Modified Amphiphobic Silica Spheres

作　　者：项小敏[1,2] 吴宝虎[1,2] 徐耀[1] 

机构地区：[1]中国科学院山西煤炭化学研究所煤转化国家重点实验室,山西太原030001 [2]中国科学院研究生院,北京100049

出　　处：《材料科学与工程学报》2010年第5期711-715,710,共6页Journal of Materials Science and Engineering

基　　金：国家自然科学基金重点资助项目(20133040)

摘　　要：本文通过化学嫁接法引入氟烷基,对溶胶-凝胶法制得的单分散二氧化硅进行改性,得到了油水双疏的纳米二氧化硅小球,并考察了水和氟烷基硅烷对颗粒形貌及双疏性的影响。采用傅立叶红外光谱仪(FTIR)、扫描电子显微镜(SEM)、接触角测量仪(CA)及热重分析(TG)对产物进行了表征。结果表明,一定范围内延迟氟烷基硅烷的加入时间和增加水含量,可得到分散性、均匀性和双疏性都较好的表面改性SiO2球。增加氟烷基硅烷量,改性SiO2球的双疏性增强,但是分散性和均匀性变差,并出现了不规则形貌颗粒。Monodispersed amphiphobic nano-silica spheres were obtained by grafting the fluoroalkyl groups onto the sol-gel nano silica surface.The effects of water and fluoroalkylsilane（FAS） on the morphology and amphiphobic ability of silica particles were investigated.The synthesized silica was characterized by Fourier transform infrared（FTIR） spectroscopy,scanning electron microscopy（SEM）,contact angle（CA） measurement and thermogravimetry（TG）.The results showed that high dispersive,uniform and amphiphobic modified-silica spheres can be synthesized by delaying the addition of FAS and increasing the amount of water.With increasing the amount of FAS,the amphiphobic ability of modified-silica was enhanced but low dispersive,inhomogeneous and irregular silica particles were observed.

关 键 词：氧化硅球 氟烷基硅烷 表面改性 双疏 溶胶-凝胶法 

分 类 号：TQ174[化学工程—陶瓷工业]