摘要
以高分子物质三醋酸纤维素(CTA)作为膜材料主要成分,将其溶解于1,4-二氧六环溶剂中,加入致孔剂聚乙烯吡咯烷酮K30(PVP),加热搅拌形成均匀铸膜液采用相转化法制备正渗透膜。在温度为(20±1)℃,原溶液为去离子水,汲取液为2 mol/L氯化钠溶液的条件下测试膜的性能,研究了CTA和PVP含量及预蒸发时间3种因素对正渗透膜性能的影响。结果表明,在1,4-二氧六环和乳酸体积分别为170和13.2 mL下,当CTA和PVP的质量分别为23、4 g,预蒸发时间为60 s时,正渗透膜的性能最佳,水通量可达10.24 L/(m2·h),溶质反混通量为6.68 g/(m2·h)。
The forward osmosis membrane was prepared via phase inversion method by using cellulose Iriacetate （CTA） as main material, 1,4-dioxane as solvent, and polyvinyl pyrrolidone （PVP） as porogen. At approximately 20 ℃, the membrane performance was tested with 2 mol/L NaCI solution as the draw solution and deionized water as the feed solution. The effects of CTA content, PVP content and solvent evaporation time on the membrane performance were investigated： The results show that when 1,4-dioxane and lactic acid were 170 mL and 13.2 mL, the CTA and PVP content were 23 g and 4 g, and pre-evapomtion time was 60 s, the membrane has the optimum performance （the water flux was 10.24 L/（m2.h） and reverse solute flux was 6.68 g/（m2.h）.
出处
《水处理技术》
CAS
CSCD
北大核心
2013年第10期27-30,共4页
Technology of Water Treatment
基金
国家科技支撑计划课题(2012BAJ25B04)
