溶胶-凝胶法制备PTFE/SiO_2杂化材料的工艺研究  

Study on PTFE/SiO_2 Hybrid Materials Prepared by Sol-gel Method

作　　者：张冬娜[1] 寇开昌[1] 高攀[1] 王志超[1] 晁敏[1] 

机构地区：[1]西北工业大学理学院,陕西西安710129

出　　处：《中国塑料》2011年第1期47-50,共4页China Plastics

摘　　要：研究了溶胶-凝胶法制备聚四氟乙烯/二氧化硅(PTFE/SiO2)杂化材料的工艺条件,讨论了乙醇对杂化材料中PTFE与SiO2分散性的影响。按照SiO2在杂化材料粉体中理论含量为50%的配方来制备PTFE/SiO2杂化材料,分别研究了陈化时间和陈化温度对SiO2实际含量的影响。结果表明,SiO2的含量随陈化时间的延长而增加,在最初的5 h内增长很快,当陈化时间达到48 h后,SiO2含量达到38.9%。在不同温度下将PTFE/SiO2凝胶陈化1 h,随着陈化温度的升高,SiO2含量出现先增大后减小的趋势,在40℃时含量达到最大为19.8%。The sol-gel preparation of polytetrafluoroethylene/silicon dioxide （PTFE/SiO2） hydrid materials was investigated. The effect of ethanol on the dispersion of PTFE and SiO2 was also discussed. The formula was designed for a 50% theoretical SiO2 content in PTFE/SiO2 hybrid materials. The impacts of aging time and aging temperature on the actual content of SiO2 were studied. The results showed that with the elongation of aging time, the content of SiO2 increased. In the first 5 h, the increase was very fast and reached 38. 9% by 48 h. The effect of aging temperature was studied at aging time of 1 h. It showed that with the increasing temperature, the content of SiO2 increased at first and then decreased. The content of SiO2 was 19.8% when aging temperature was 40 ℃.

关 键 词：聚四氟乙烯 二氧化硅 杂化材料 溶胶-凝胶法 陈化 乙醇 

分 类 号：TB332[一般工业技术—材料科学与工程]