| DSC法对溶剂在膜中状态的研究 |
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| 引用本文： | 张玉忠,张可达,徐纪平. DSC法对溶剂在膜中状态的研究[J]. 天津工业大学学报, 1991, 0(3) |
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| 作者姓名： | 张玉忠 张可达 徐纪平 |
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| 作者单位： | 天津纺织工学院膜技术开发应用研究部，中国科学院长春应用化学研究所，中国科学院长春应用化学研究所 |
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| 摘 要： | 本文用DSC对溶剂在PVA热交联膜、PVA/NaOH膜PVA/MBA膜及PVA/P(AmCoAANa)共混膜中状态进行研究,在溶胀状态下,水存在三种状态即自由水中间水及键合水,水/乙醇溶液则存在自由态及其它状态,在渗透气化状态下,对于PVA/P(AmCoAANa)共混膜,当料液为水时,则有自由态水存在。另外结合测定渗透气化状态下膜中溶剂含量初步探讨了渗透气化机理。
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| 关 键 词： | 渗透气化 膜 改性聚乙烯醇膜 |
The Solvent State in Membrane Studied by DSC |
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| Zhang Yuzhong,The. The Solvent State in Membrane Studied by DSC[J]. Journal of Tianjin Polytechnic University, 1991, 0(3) |
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| Authors: | Zhang Yuzhong The |
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| Affiliation: | Zhang Yuzhong,The Department of Membrane Technology Research,Development and Application,Tianjin Institute of Textile Science and Technology,TianjinZhang Keda,Xu Jipin,Changchun Institute of Applied Chemistry,Academy Sinica |
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| Abstract: | The state of solvents in heat crosslinked PVA membrane, PVA/NaOH membrane, PVA/MBA membrane and PVA/P (AMcoAANa) blend membrane was studied by DSC. In swollen membrane, it was found out that there are three state water molecules, that is, free state, intermediate state and bond state. Free state H_2O/EtOH molecules were also found when feed is H_2O/EtOH mixture. When feed is pure water the free state water was found for PVA/P (AMcoAANa) blend membrane in pervaporation. However when feed contains ethanols, the free state solvents could not be detected by DSC in pervaporation. In addition the transport mechanism was proposed. |
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| Keywords: | pervaporation membrane modified PVA membrane |
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