摘要
以浓氨水为催化剂、正硅酸乙酯(TEOS)为原料,通过种子生长法制得二氧化硅纳米球;进一步以十三氟辛基三乙氧基硅烷(F-8261)对二氧化硅纳米球的表面进行改性,得到氟烷基改性二氧化硅纳米球。利用IR、UV、TEM等手段对氟烷基改性纳米球进行了表征。结果表明,改性单体F-8261通过化学键结合在二氧化硅纳米球表面;通过改变催化剂的用量,可制得平均粒径分别为35 nm和86 nm的纳米球。用含氟烷基改性二氧化硅纳米球的乙醇溶液处理玻璃、基准混凝土,其表面与水的的静态接触角分别从32°和0°提高到104°和141°,表明处理过的基材表面具有良好的防水和防污性能。
The process of preparing fluoroalkyl - containing silica nanospheres was described in this paper. Firstly, SiO2 nanospheres were prepared via seeded growth method with ammonia water as the catalyst, TEOS as materials, and further surface modified by F- 8261. The fluoroalkyl -containing silica nanospheres were characterized by a combination of IR, UV, and TEM analysis. The IR spectrum showed that F -8261 was connected with the surface of SiO2 nanospheres via O - Si chemical bond. By changing the amount of the catalyst, the fluoroalkyl- containing silica nanospheres with an average diameter （35 nm, 86 nm） were obtained, respectively. The fluoroalkyl -containing silica nanospheres could be used for treating glass and concrete. The surface - treated glass and concrete had good hydrophobic and anti - fouling performance, with surface contact angles of 104° and 141°, respectively.
出处
《有机硅材料》
CAS
2009年第4期238-241,共4页
Silicone Material
基金
湖北省教育厅优秀中青年项目(Q20081506)
武汉市科学技术局青年晨光计划项目(200750731257)
关键词
二氧化硅纳米球
种子生长法
氟烷基硅烷
silica nanospheres, seeded growth method, fluoroalkyl -containing organosilane
