Al2O3-TiO2 复合溶胶性能测定及覆膜参数研究

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中图分类号： TQ051.893;X703 文献标志码：A DOI：10.13338/j . issn.1674-649x.2025.01.013

Properties determination of Al2O3 -TiO2 composite sol and study of coating parameters

GUO Yani ，WANG Jiaqing ，ZHAN hui ，CHEN Weixing ，ZHANG Boyi ，TONG Zhi （School of Environmental and Chemical Engineering，Xi 'an Polytechnic University，Xi’ an 710048，China）

Abstract To enhance the performance of porous ceramic membranes and optimize the coating conditions of Al2O3-TiO2 composite sol on the ceramic membrane support，a sol-gel method was used to prepare the composite sol coating solution. Fly ash was used as an aggregate to create the ceramic membrane support. The composite coating solution was applied to the support using an impregnation-lifting method，and the efects of factors such as the number of coating cycles，lifting speed，and impregnation time on the support coating were investigated.By characterizing the pure water flux， flexural strength，micro-morphology，and membrane adhesion of the coated support，the coating effect was evaluated. The results show that the Al2O3-TiO2 composite sol coating should be applied three times， with an immersion time of 6O seconds and a constant lifting speed of 3mm/s . The resulting coated ceramic membrane has a uniform thickness and a relatively intact surface morphology.

Keywords Al2O3-TiO2 composite sol;fly ash;porous ceramic film; water flux;flexural strength

引言

膜分离技术已广泛应用于污废水处理、海水淡化、石油化工、粮食生产等多个领域[1-4]，成为当前研究和开发的热点。（剩余12474字）