摘要
以钛酸四异丙酯为原料,采用溶胶G凝胶法制备TiO2粒子溶胶,以孔径100nm 的管式Al2O3微滤膜为支撑体制备超滤膜,研究了涂膜溶胶中添加剂比例、涂膜次数和涂膜时间对超滤膜完整性的影响.结果表明,调整添加剂比例、涂膜次数和涂膜时间可以消除超滤膜的缺陷;添加剂比例对TiO2超滤膜的物相没有影响.溶胶中添加剂比例m （TiO2）∶m （PVA）∶m （HPC）=8∶2∶2,涂膜两次,每次涂膜时间为10-15s时,可以获得无裂纹、无针孔的超滤膜,TiO2超滤层厚度约1μm,孔径分布于3-8nm 之间,孔隙率42%.
TiO2 colloidal sol was prepared by sol-gel method with titanium tetra-isopropoxide as raw material. Ti O2 ultrafiltration membranes were prepared using Al2O3 microfiltration membrane of 100 nm pore size as support. Effects of additive contents in dipping sols,coating times and coating time on the integrity of Ti O2 ultrafiltration membranes were investigated. It is indicated that defects in Ti O2 ultrafiltration membranes can be deliminated by adjusting additive contents,coating times and coating time. Additive content in sol has no effects on the phase of Ti O2 ultrafiltration membranes.Ti O2 ultrafiltration membranes without cracks and pinholes can be obtained from Ti O2 sol with a mass ratio m( Ti O2) ∶ m( PVA) ∶ m( HPC) of 8∶ 2∶ 2 by coating for 10-15 s twice. Ti O2 layer thickness is about 1 μm,the pore size distributes in the range of 3-8 nm,and the porosity is 42%.
出处
《功能材料》
EI
CAS
CSCD
北大核心
2015年第10期10148-10152,共5页
Journal of Functional Materials
基金
国家自然科学基金资助项目(51178017)
关键词
TiO2超滤膜
非对称膜
孔结构
TiO2 ultrafiltration membrane
asymmetric membrane
pore structure
