摘要
以洛川黄土为原料,通过滚压成型和常压烧结法制备黄土基陶瓷膜支撑体试样,以膨润土的添加量及不同烧结温度为变化条件,研究支撑体样品的纯水通量、抗折强度及酸碱腐蚀率的变化情况。利用热重分析仪、场发射扫描电镜、X射线粉末衍射仪及压汞仪对支撑体样品进行热分析、微观形貌、物相组成及孔径分布分析。结果表明:膨润土可显著提高支撑体强度,当膨润土添加量为6%、烧结温度为1 120℃制备出性能最佳的黄土基支撑体,三点弯曲强度达45.7 MPa,纯水通量为10 870 L/(m^2·h·MPa),酸碱腐蚀后质量损失率为2.54%与2.32%,中值孔径为2.47μm,主峰孔径分布为374.6~4617.7 nm,孔隙率达15.6%。
Using Luochuan loess as a raw material, a sample of a loess-based ceramic membrane support was prepared by rolling forming and atmospheric sintering. The amount of bentonite and different sintering temperatures were used to study the pure water flux and resistance change in breaking strength and acid-base corrosion rate. Thermogravimetric analysis, field emission scanning electron microscopy, X-ray powder diffractometer and mercury indenter were used for thermal analysis, micromorphology, phase composition and pore size distribution analysis of the support samples. The results show that bentonite could significantly increase the strength of the support. When the amount of bentonite was 6% and the sintering temperature was 1 120 ℃, the best-performing loess-based support was prepared. The three point bending strength reached 45.7 Mpa and pure water flux was 10 870 L/(m^2·h·MPa). The mass loss rate after acid-alkali corrosion was 2.54% and 2.32%, the median pore size was 2.5 μm, the main peak pore size distribution was 374.6~4 617.7 nm, and the porosity reached 15.6%.
作者
薛刘蒂
同帜
张健需
行静
黄开佩
XUE Liudi;TONG Zhi;ZHANG Jianxu;XING Jing;HUANG Kaipei(School of Environmental and Chemical Engineering,Xi'an Polytechnic University,Xi'an 710000,China)
出处
《功能材料》
EI
CAS
CSCD
北大核心
2020年第5期5175-5180,共6页
Journal of Functional Materials
基金
陕西省科技厅重点研发计划专项资助项目(2018GY-178)。
关键词
膨润土
烧结温度
黄土
陶瓷膜支撑体
bentonite
sintering temperature
loess
ceramic membrane support
作者简介
薛刘蒂(1996-),男,陕西延安人,研究生,师承同帜教授,从事新型环保材料(功能性陶瓷膜)研究;通讯作者:同帜,E-mail:1018915428@qq.com。
