| 聚甲基丙烯酸十二酯-丙烯酸共聚物对乳状液膜中Cu2+迁移的影响 |
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| 引用本文： | 田大听. 聚甲基丙烯酸十二酯-丙烯酸共聚物对乳状液膜中Cu2+迁移的影响[J]. 过程工程学报, 2008, 8(2): 248-252 |
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| 作者姓名： | 田大听 |
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| 作者单位： | 湖北民族学院化学与环境工程学院,湖北,恩施,445000 |
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| 基金项目： | 湖北省教育厅自然科学重点基金资助项目(编号:D200629003) |
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| 摘 要： | 将两亲共聚物聚甲基丙烯酸十二酯-丙烯酸[P(DM-AA)]作为膜稳定剂加到由Span-80作表面活性剂、二-(2-乙基己基)磷酸(HDEHP)作流动载体、煤油和液体石蜡作膜溶剂及硫酸稀溶液作内相而组成的W/O型乳状液膜中，研究了此体系对Cu2+的迁移作用. 结果表明，由于两亲高分子的空间稳定作用而导致乳液膜对Cu2+具有较好的迁移效果. 最优条件为：在膜相中P(DM-AA)含量 3.0%, Span-80 4.0%, HDEHP 3.0%, 石蜡6.0%(w), 膜相:料相=1:10(j), [H+]=1.0 mol/L，接触时间6 min，搅拌速率200~300 r/min. 此外，还探讨了乳状液膜的结构和Cu2+迁移的机理，认为其迁移属于异向耦合传输机理.
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| 关 键 词： | 两亲共聚物 乳状液膜 迁移 稳定剂 铜离子 |
| 文章编号： | 1009-606X(2008)02-0248-05 |
| 收稿时间： | 2007-08-03 |
| 修稿时间： | 2007-08-03 |
Influence of Copolymer of Dodecyl Methacrylate-Acrylic Acid on Transfer of Cu2+ Ions through Emulsion Liquid Membrane |
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| TIAN Da-ting. Influence of Copolymer of Dodecyl Methacrylate-Acrylic Acid on Transfer of Cu2+ Ions through Emulsion Liquid Membrane[J]. Chinese Journal of Process Engineering, 2008, 8(2): 248-252 |
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| Authors: | TIAN Da-ting |
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| Abstract: | The effects of separation conditions of emulsion liquid membrane on the transfer rate of Cu2+ are studied. The membrane is composed of an amphiphilic copolymer of dodecyl methacrylate and acrylic acid [P(DM-AA)], sorbitan monooleate (Span-80), di(2-ethylhexyl) phosphoric acid (HDEHP), kerosene, paraffin oil, and an aqueous H2SO4 solution, which are used as membrane stabilizer, surfactant, carrier, solvent and internal phase, respectively. The results show that the transfer rate of Cu2+ is significantly improved by the steric stabilization of the amphiphilic copolymer. The optimum conditions are determined as follows: P(DM-AA) 3.0%, Span-80 4.0%, HDEHP 3.0%, paraffin oil 6.0%, volumetric ratio of membrane phase to feed phase 1:10, [H+]=1.0 mol/L, contact time 6 min, and stirring rate 200~300 r/min. Moreover, the structure of the emulsion liquid membrane and the mechanism of a coupled counter-transport are also discussed. |
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| Keywords: | amphiphilic copolymer emulsion liquid membrane transfer stabilizer copper ion |
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