摘要
以聚乙烯吡咯烷酮（PVP）与聚碳硅烷（PCS）为原料,利用静电纺丝法制得PCS/PVP复合纤维,通过空气交联,氩气（Ar）气氛下高温（1000~1400℃）处理以及空气中500℃除碳,最终得到碳化硅（SiC）纤维。利用场发射扫描电镜（FE-SEM）、X射线衍射仪（XRD）、傅里叶变换红外光谱（FT-IR）及X射线光电子能谱（XPS）等对所得纤维进行形貌、微观结构和成分分析,并研究了不同处理温度对SiC纤维结构和形貌的影响。结果表明,利用静电纺丝法可以得到质量较好的SiC纤维,热处理温度为1000℃和1200℃时得到无定形的SiC纤维,热处理温度为1400℃时可以得到结晶较好的β-SiC纤维。
Polycarbosilane/poly（vinyl pyrrolidone） composite fibers were prepared by electrospinning using PVP and PCS as raw materials,then the PCS/PVP composite fibers were treated by cross-linking the as-spun fibers in air,heat treatment under Ar atmosphere at different temperatures（1000～1400 ℃） and removing carbon at 500 ℃ in air to obtain Silicon carbide（SiC） fibers.The obtained SiC fibers were characterized by FE-SEM,XRD,FT-IR and XPS.The influence of the calcined temperature on the morphology and microstructure of SiC fibers was discussed.The results show that the high-quality SiC fibers can be prepared by electrospinning method.The amorphous SiC fibers were obtained when the calcined temperature is 1000 ℃ and 1200 ℃,respectively.The crystalline SiC fibers formed at 1400 ℃ and the fiber-like structure could be maintained after calcining at high temperature.
出处
《人工晶体学报》
EI
CAS
CSCD
北大核心
2010年第6期1559-1563,共5页
Journal of Synthetic Crystals
基金
中国科学院"百人计划"资金项目
