Abstract:

The quaternized polysulfone（QMPSF）/polysulfone（PSF） membrane has been prepared through dipping chloromethylated polysulfone （CMPSF）/polysulfone （PSF） blend membrane into trimethylamine solution. The effects of quaternized reaction conditions such as quaternization temperature， quaternization time， concentration of trimethylamine solution etc. on the performance of QMPSF/PSF membrane have been investigated by orthogonal design. The quaternization conditions are optimized. The quaternized QMPSF/PSF membrane with good performances has been prepared. The experimental results shows that under the operating pressure of 0.2 MPa， the water flux of the quaternized QMPSF/PSF membrane is 31.35 L/（m²·h）， while the retention of polyvinyl alcohol（PVA， relative molecular mass 31 000-50 000） is 89.6％.

Key words: chloromethylated polysulfone, quaternized polysulfone membrane, ultrafiltration membrane

摘要：

将氯甲基化聚砜(CMPSF)/聚砜(PSF)共混膜浸于三甲胺溶液中制得季铵化聚砜(QMPSF)/聚砜(PSF)膜。采用正交实验考察了季铵化反应条件如季铵化温度、季铵化时间、三甲胺浓度等对QMPSF/PSF膜性能的影响,优化了季铵化条件,制得了性能较佳的季铵化QMPSF/PSF膜。研究结果表明,在0.2 MPa压力下,制备的季铵化QMPSF/PSF膜的水通量为31.35 L/(m².h),对相对分子质量为31 000~50 000的聚乙烯醇溶液的截留率为89.6%。

关键词: 氯甲基化聚砜, 季铵化聚砜膜, 超滤膜

CLC Number: 

• TQ028.8