摘要
分别以聚乙烯吡咯烷酮(PVP)和乙酰丙酮铝作为聚合物和氧化铝前驱体,利用溶胶-凝胶法和静电纺丝技术,在合适的工艺条件下得到了形态良好的氧化铝初生混合纤维,并于1300℃烧结1 h后,得到了直径在200 nm左右的α-氧化铝纤维。透射电子显微镜(TEM)结果表明:α-氧化铝纤维是由无数尺寸在7～12 nm之间的晶粒相互融合形成的。研究了不同的升温速率对于氧化铝纤维形态的影响,结果表明:升温速率越小,越有利于氧化铝纤维的成形。通过将初生纤维于不同温度下烧结,讨论了其在热处理过程中的晶相衍变历程。
Polymer-alumina as-spun composite fibers were electrospun from a solution composed of polyvinylpyrrolidone （PVP） and aluminum 2,4-pentanedionate. Upon sintering the composite fibers at 1300℃ for 1 h, α-alumina fibers with diameter of about 200 nm were obtained. It was shown by TEM that the α- alumina fiber consists of crystalline grains with size ranging from 7 to 12 nm. The influence of heating rate on the morphology of alumina fibers was investigated and the results showed that the lower the heating rate was, the better the morphology of alumina fibers was. Then the phase evolution was investigated by sintering the as-spun composite fibers at different temperatures.
出处
《合成纤维》
CAS
2011年第7期14-17,共4页
Synthetic Fiber in China
基金
国家自然科学基金(NSFC50803012)
关键词
静电纺丝
氧化铝纤维
形态
相变
electrospinning, alumina fiber, morphology, phase evolution
