助纺剂对非水解溶胶-凝胶法制备钛酸铝纤维的影响

本文采用非水解溶胶-凝胶(NHSG)法制备钛酸铝纤维。利用DTA-TG、XRD、TEM、SEM、FE-SEM等测试手段研究了钛酸铝的物相转变过程,探讨了助纺剂种类及其用量对制备钛酸铝纤维的影响。结果表明:采用NHSG法在750℃便能形成钛酸铝晶相,溶剂DBE和助纺剂环氧树脂的引入没有影响钛酸铝的低温合成;环氧树脂作为助纺剂有利于在溶胶中形成线性胶粒,提高溶胶的可纺性;环氧树脂的添用量对钛酸铝纤维的制备影响较大,其用量为1∶1时,可制得表面光滑、结构致密,质量较好的钛酸铝纤维。

Effect of Spinning Aid on the Preparation of Aluminum Titanate Fiber by Non-hydrolytic Sol-gel Method

Aluminum titanate fiber was prepared by non-hydrolytic sol-gel (NHSG) method.The phase transformation process of aluminum titanate were studied by DTA-TG, XRD, TEM, SEM, FE-SEM, and the effects of the type and amount of the spinning aid on the phase and morphology of aluminum titanate fiber were discussed.The results show that aluminum titanate crystal phase can form by NHSG method at 750 ℃, and the introduction of solvent DBE and spinning aid epoxy resin does not affect the low temperature synthesis of aluminum titanate.As a spinning aid, epoxy resin is conducive to form the linear colloidal particles in the sol, resulting in the improvement of the sol.Spinning aid amount is critical to the preparation of aluminum titanate fiber.High quality aluminum titanate fiber, which has smooth surface and compact structure, can be achieved when the mass ratio of aluminum titanate to epoxy resin is 1∶1.