纳米无机小分子物质对PVC/PVDF/PMMA共混膜性能的影响

Effects of inorganic material on the property of PVC/PVDF/PMMA blend membrane

讨论了纳米无机小分子物质TiO2、SiO2、Al2O3对PVC/PVDF/PMMA共混溶液的剪切黏度及其共混膜形态结构、水通量及机械性能等性能的影响,结果表明,无机小分子TiO2、SiO2、Al2O3的加入均能使PVC/PVDF/PMMA共混溶液的剪切粘度增加,但TiO2增加的程度最大,SiO2、Al2O3增加的程度相当;纳米TiO2、SiO2、Al2O3对使PVC/PVDF/PMMA共混膜的水通量和韧性有较大程度的提高,且加入量为2%时,提高程度最大;SiO2、Al2O3对共混膜的结构有一定程度的影响,并使共混膜的拉伸强度略有降低,TiO2的加入对膜的结构没有太大的影响,但能使共混膜的拉伸强度略有提高.

Effects of nano particle inorganic material TiO2, SiO2, Al2O3 on the viscosity of PVC/PVDF/ PMMA blended solution and its property of membranes were investigated. Results indicated that nano particle inorganic material TiO2, SiO2, Al2O3 all could raise the viscosity of PVC/PVDF/PMMA blended solution, but the extent increased by TiO2 was the most and that by SiO2 and Al2O3 were almost the same. On the other hand , nano particle inorganic material TiO2, SiO2, Al2O3 all could improve the flux and flexibility of PVC/PVDF/PMMA blended membranes and the improvement got to the greatest extent when their content was 2%, however, the extents of improvement for nano particle iinorganic material TiO2, SiO2, Al2O3 were different due to their e{fects on the microstructure of cross-section of PVC/PVDF/ PMMA blended membranes. On the other hand, effects of TiO2 on the flexibility of PVC/PVDF/PMMA blended membranes were little but on the tensile strength were great but SiO2,Al2O3 made the tensile strength of PVC/PVDF/PMMA blended membranes decreased to some extent.