| 摘要: |
| 在涂膜液聚乙烯醇（PVA）-壳聚糖（CS）混合物中加入无机相氧化多壁碳纳米管（O-MWNTs），使用浸渍法涂膜的方式制备PVA-CS-O-MWNTs/PAN中空纤维膜（PAN为聚丙烯腈），应用于渗透汽化分离甲醇（MeOH）/碳酸二甲酯（DMC）混合物.考察了O-MWNTs含量、热处理温度、料液温度对渗透汽化性能的影响.结果表明，加入氧化多壁碳纳米管可以提高PVA-CS/PAN膜的渗透通量、亲水性和机械性能.较佳的工艺条件为：O-MWNTs质量分数为0.1%，热处理温度为80℃，料液温度为40℃，MeOH的质量分数为70%.在此实验条件下，PVA-CS-O-MWNTs/PAN膜的渗透汽化性能达到最佳，渗透通量为210 g·m-2·h-1，甲醇选择性为7.82. |
| 关键词: 氧化多壁碳纳米管 中空纤维膜 聚乙烯醇(PVA) 壳聚糖(CS) 渗透汽化 |
| DOI：10.3969/J.ISSN.1000-5137.2017.04.003 |
| 分类号:TQ31 |
| 基金项目:上海市地方能力建设项目（14520502900） |
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| The effects of O-MWNTs on the performances of PVA-CS-O-MWNTs/PAN pervaporation membrane |
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Yan Xi, Liu Yan, Lang Wanzhong
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College of Life and Environmental Sciences, Shanghai Normal University, Shanghai 200234, China
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| Abstract: |
| Oxidized multi-wall carbon nanotubes(O-MWNTs) were used as inorganic nanofillers and added in the coating solution of polyvinyl alcohol (PVA)-chitosan (CS) mixtures,and the PVA-CS-O-MWNTs/PAN hollow fiber membranes were prepared by the dip-coating method for the pervaporation separation of methanol (MeOH)/dimethyl carbonate (DMC) mixture.The process conditions including the O-MWNTs amount,heat treatment temperature,and feed temperature were investigated in detail.The results indicate that the addition of O-MWNTs can enhance the permeation flux,hydrophilicity and mechanical properties of PVA-CS-O-MWNTs/PAN membranes.The preferable conditions are that O-MWNTs amount,heat treatment temperature,feed temperature,and the concentration of MeOH are 0.1%,80℃,40℃ and 70%,respectively.Thus,the permeation fluxand MeOHselectivity can attain 210 g·m-2·h-1and 7.82,respectively. |
| Key words: O-MWNTs hollow fiber membrane polyvinyl alcohol chitosan pervaporation |
