摘要
采用孔径为200 nm的多通道ZrO2膜为底膜,利用湿化学法制备小孔径ZrO2超滤膜。结合N2吸附-脱附法和X线衍射分析,考察烧结温度对膜结构的影响,确定合适的烧结温度。通过扫描电镜(SEM)表征膜形貌,采用错流过滤考察膜的渗透和分离性能。结果表明:烧结温度为600℃时可以制备完整无缺陷的ZrO2超滤膜,所制备的超滤膜具有高纯水通量,截留相对分子质量(MWCO)为20 000,对相对分子质量为43 000卵清蛋白的截留率达到95%。
Zirconia ultrafiltration membranes were fabricated by the wet chemical route.The multichannel zirconia microfiltration membrane with the pore size of 200 nm served as the substrate,and zirconia nanoparticle suspension was used to form the membrane layer.The effects of sintering temperature on the microstructure were investigated by X-ray diffraction（XRD） analysis and nitrogen adsorption/desorption.The morphology of the membrane was analyzed by scanning electron microscope（SEM）.The permeation and separation performances of the membranes were evaluated by cross-section filtration.The results showed that the membranes were crack-free when the sintering temperature was controlled at 600 ℃.The membrane had higher pure water flux and the molecular weight cut off（MWCO） was 20 000 for multichannel zirconia membrane.The retention rate of the egg albumin（Mw=43 000） reached 95%.
出处
《南京工业大学学报（自然科学版）》
CAS
北大核心
2011年第3期78-81,共4页
Journal of Nanjing Tech University(Natural Science Edition)
基金
国家重点基础研究发展计划(973计划)资助项目(2009CB623400)
国家高技术研究发展计划(863计划)资助项目(2007AA030303)
国家自然科学基金资助项目(20776067)
关键词
陶瓷膜
超滤膜
烧结温度
ceramic membrane
ultrafiltration membrane
sintering temperature
