| 聚丙烯接枝聚丙烯酸中空纤维膜的pH响应性 |
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| 引用本文： | 刘燕军,吕春英,陈蕊,傅学起.聚丙烯接枝聚丙烯酸中空纤维膜的pH响应性[J].中山大学学报(自然科学版),2007,46(Z1). |
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| 作者姓名： | 刘燕军 吕春英 陈蕊 傅学起 |
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| 作者单位： | 南开大学环境科学与工程学院，天津工业大学材料化工学院，南开大学环境科学与工程学院，南开大学环境科学与工程学院 天津300071天津工业大学材料化工学院，天津300160，天津300160，天津300071，天津300071 |
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| 摘 要： | 评价了聚丙烯酸接枝改性聚丙烯中空纤维膜的pH响应性。在接枝率小于17%时,接枝膜的pH敏感性随接枝率的增加而提高。在牛血清蛋白(BSA)溶液微滤试验中,接枝膜与未接枝膜在BSA的等电点4.7处,都表现出严重的膜污染;而pH=3时,膜通量下降趋势最小。与未接枝膜相比,接枝膜在pH=3时污染较严重,而接枝率18%的膜在pH4.7和8时表现出一定的抗污染性。研究表明:蛋白质与膜之间的电荷作用以及BSA和膜构象的变化都是膜污染的重要影响因素。
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| 关 键 词： | pH敏感性 水渗透性 牛血清蛋白 微滤 |
The pH Dependence of Poly(acrylic acid)-graft-Polypropylene Hollow Fiber Membrane |
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| LIU Yan-jun,LU Chun-ying,CHEN Rui,FU Xue-qi.The pH Dependence of Poly(acrylic acid)-graft-Polypropylene Hollow Fiber Membrane[J].Acta Scientiarum Naturalium Universitatis Sunyatseni,2007,46(Z1). |
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| Authors: | LIU Yan-jun LU Chun-ying CHEN Rui FU Xue-qi |
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| Abstract: | The pH dependence of poly (acrylic acid)-graft-polypropylene membranes were evaluated. The result shows that pH sensitivity of grafted membranes increases with the rise of grafting degree (dg) as dg<17%. For the microfiltration of Bovine serum albumin (BSA) solution, all membranes show the most serious fouling behavior at pH 4.7(the isoelectric point IEP of BSA) and the smallest flux decline at pH 3. Compared with the ungrafted PP membrane, grafted membranes show more serious fouling behavior at pH 3, whereas 18% grafted membrane has a certain antifouling behavior at pH 4.7 and 8. It has been shown that the electrical interactions and the conformation of BSA and grafted chains should be considered to analyze the fouling behavior. |
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| Keywords: | pH sensitivity water permeability Bovine serum albumin microfiltration |
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