聚硅氧烷微球的合成与陶瓷化  

The Research of Polysiloxane Microspheres Synthesis and Transformation to Ceramics

作　　者：康伟[1] 刘洪丽[1] 周彩楼[1] 李婧[1] 

机构地区：[1]天津城建大学材料科学与工程学院,天津300384

出　　处：《天津城建大学学报》2016年第1期39-43,共5页Journal of Tianjin Chengjian University

基　　金：国家自然科学基金(51472175);天津市高等教育科技发展基金计划项目(20130314)

摘　　要：以聚硅氧烷先驱体为原料,利用乳液法与先驱体转化法相结合制备聚硅氧烷微球及Si/O/C陶瓷微球.通过改变固化时间、固化温度、热解温度等工艺参数,研究了聚硅氧烷微球和陶瓷微球的形成过程,采用SEM、TEM、FT-IR、TG及XRD对聚硅氧烷微球及陶瓷微球进行了微观形貌、粒径大小及分布、化学成分、陶瓷产率及物相分析.结果表明:固化温度为200,℃、固化时间为10,h时合成了表面光滑球形度好的聚硅氧烷微球,其分布较为均一,平均粒径为0.866,μm;经1,300,℃获得的陶瓷微球能够保持完整的球形结构及光滑表面,平均粒径为0.751,μm,陶瓷产率为82.26%.XRD图谱表明,烧结后得到了Si/O/C陶瓷微球,经1,400,℃烧结后出现了Si C晶相和Si O2晶相.The polysiloxane microspheres and Si/O/C ceramic microspheres were prepared via simple emulsion technique combined with polymer-derived ceramics(PDCs) method using polysiloxane as raw materials. The forming process of polysiloxane microspheres and ceramic microspheres were tuned by adjusting the operation conditions, such as curing time, curing temperature and pyrolysis temperature. The morphology, size distribution, chemical composition, ceramic yield and phase transformation were characterized by SEM、TEM、FT-IR、TG and XRD. The polysiloxane microspheres with good spherical structure were fabricated at 200 ℃ for 10 h, and the average size was 0.866,μm. After pyrolyzed at 1,300 ℃, the obtained ceramic microspheres exhibited unbroken spherical structure and smooth surface with an average size of 0.751 μm. The ceramic yield was 82.26%. The XRD showed that Si/O/C ceramic microspheres were obtained after pyrolyzed, and the crystalline phase of Si C and SiO_2 could be gained after pyrolyzed at 1,400 ℃.

关 键 词：聚硅氧烷微球 陶瓷微球 先驱体转化法 乳液法 

分 类 号：TQ264.17[化学工程—有机化工] O634.41[理学—高分子化学]