静电纺丝法制备锆酸镧超细纤维
发布时间：2018-12-29 08:46
【摘要】：为了获得直径更加均匀、细小的锆酸镧纤维,以无水三氯化镧和八水氧氯化锆为原料,聚乙烯吡咯烷酮(PVP)为助纺剂,采用溶胶-凝胶法制备纺丝溶液,经静电纺丝技术制备出前驱体纤维,再分别经800、1 000以及1 200℃保温8 h煅烧后获得La_2Zr_2O_7超细纤维。利用DTA-TG、FTIR、XRD和SEM研究了锆酸镧纤维的形成过程。结果表明:1)未经煅烧的前驱体纤维粗细均匀,平均直径为400 nm;2)当煅烧温度为800℃时,开始形成萤石型锆酸镧纤维,纤维直径变细,平均直径为250 nm,纤维表面光滑;3)当煅烧温度为1 000℃时,纤维中残余有机基团消失,物相为烧绿石结构的锆酸镧,纤维表面开始变得不光滑,平均直径为180 nm;4)当煅烧温度提高到1 200℃时,锆酸镧纤维开始弯曲、粘连,表面更加粗糙。
[Abstract]:In order to obtain more uniform diameter and fine lanthanum zirconate fiber, the spinning solution was prepared by sol-gel method using anhydrous lanthanum chloride and zirconium chloride octahydrate as raw materials and polyvinylpyrrolidone (PVP) as the co-spinning agent. Precursor fibers were prepared by electrospinning and calcined at 800 鈩，
本文编号：2394606
[Abstract]:In order to obtain more uniform diameter and fine lanthanum zirconate fiber, the spinning solution was prepared by sol-gel method using anhydrous lanthanum chloride and zirconium chloride octahydrate as raw materials and polyvinylpyrrolidone (PVP) as the co-spinning agent. Precursor fibers were prepared by electrospinning and calcined at 800 鈩，
本文编号：2394606
本文链接：https://www.wllwen.com/shekelunwen/minzhuminquanlunwen/2394606.html
