膜科学与技术

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Effect of additives on the performance of fly ash-based ceramic film supports

Authors： LI Miaoyu,GUO Yani,TONG Zhi,ZHAN Hui,CUI Shuangke,LIU Lu

Units： 1. School of Environmental and Chemical Engineering，Xi 'an Polytechnic University，Xi 'an 710048，China; 2.Shaanxi Province Modern Design and Research Institute Co., LTD，Xi 'an 710048，China

KeyWords： pore-making agent，sintering assistant，ceramic membrane support，fly ash

ClassificationCode：X781.5

year,volume(issue):pagination： 2023,43(3):94-103

Abstract：

In this paper, to explore the influence of poreforming agents and sintering additives on the performance of the support body, fly ash was used as aggregate, carboxymethyl cellulose (CMC) as binder, polymethyl methacrylate (PMMA), CaCO3 and charcoal powder were selected as poreforming agents, TiO2, CaO and borax were used as sintering additives. Fly ash - based ceramic membrane supports were prepared by extrusion molding and sintering of solid particles at atmospheric pressure. Pure water flux, flexural strength, microstructure, material composition, porosity and acid-base corrosion rate were characterized. The results show that when the pore-forming agent and sintering auxiliaries are charcoal powder and TiO2, the properties of the fly ash-based ceramic membrane support body are better, which is helpful to the preparation of low-cost ceramic membrane. When the amount of charcoal powder is 15 wt%, the average pore size of the support body is 2.78 μm, the porosity is 44.68 %, and the acid and alkali corrosion rates are 0.25% and 0.22%, respectively. When the TiO2 addition amount is 4 wt%, the average pore size of the support body is 1.97 μm, the porosity is 44.95%, and the acid and alkali corrosion rates are 0.32% and 0.17%, respectively.

Funds：

陕西省科技厅重点研发计划项目（2020GY-325；2020ZDLNY06-09；2020SF-410 ）

AuthorIntro：

李苗雨（1998-），女，陕西渭南人，硕士研究生，主要从事无机陶瓷膜研究。

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