为了提高膜的亲水性和分离性能,以聚偏氟乙烯(PVDF)为聚合物,多壁碳纳米管(MWCNTS)和聚丙烯酸(PAA)为添加剂;聚乙烯吡络烷酮(PVP)为致孔剂;N,N-二甲基乙酰胺(DMAC)为溶剂,通过共混和相转换法(NIPS)制备了PAA/MWCNTS/PVDF膜(PMPM)。使用傅里叶红外光谱和扫描电镜表征膜的形貌特征,通过水通量、截留率等测试考察了膜的亲水性和分离性能。结果表明:MWCNTS和PAA的协同作用确实有利于膜的亲水性和分离性能改善,并且当MWCNTS含量为0.5%,PAA含量为0.6%时,膜的综合性能达到最优,与纯膜相比,纯水通量和截留率分别提升了89.04%和13.5%。
In order to improve the hydrophilicity and separation performance of the membrane,polyvinylidene fluoride (PVDF) was used as the polymer,and multi-walled carbon nanotubes (MWCNTS) and polyacrylic acid (PAA) were used as additives.Polyethylene pyriloxanone(PVP) was the pore-forming agent.PAA/MWCNTS/PVDF membrane (PMPM) was prepared by NIPS with N,N-dimethylacetamide (DMAC) as solvent.Indeed,the synergistic effect of MWCNTS and PAA was conducive to the improvement of hydrophilicity and performance of the membrane.Moreover,when the content of MWCNTS was 0.5% and the content of PAA was 0.6%,the comprehensive performance of the membrane reached the optimal level.Compared with the pure membrane,the pure water flux and retention rate are improved by 89.04% and 13.5% respectively.
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