| 一种新型阳膜输运离子的特性研究 |
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| 引用本文： | 左行涛,于水利,王娟,暴瑞玲,许霞,徐俊.一种新型阳膜输运离子的特性研究[J].中国给水排水,2009,25(15). |
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| 作者姓名： | 左行涛 于水利 王娟 暴瑞玲 许霞 徐俊 |
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| 作者单位： | 哈尔滨工业大学市政环境工程学院,黑龙江,哈尔滨,150090 |
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| 基金项目： | 国家高技术研究发展计划(863)项目 |
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| 摘 要： | 采用共混法制备了SiO2/PVDWGMA(纳米SiO2颗粒改性聚偏氟乙烯)阳离子交换膜,以改善膜在高浓度电解质溶液中对离子的选择透过性,提高膜的抗污染能力.结果表明,当SiO2含量为0.28%时,膜的含水率为26.2%,与未添加SiO2的相比增加了62%,离子交换容量相应增加了60%,表明膜的亲水性得到了提高.膜的电导率和反向离子在膜内的扩散系数与膜对离子的选择透过性系数,随膜矩阵中硅含量的增加而增大.当SiO2含量为0.28%、外液离子浓度为0.055 mol/L时,Na+、Ca2+和Mg2+的迁移数为0.985、0.942、0.928;离子浓度降低时,膜对离子的选择透过性反而增强.该膜对高浓度电解质溶液中相对离子的选择性较高,具有良好的电导率,可用于海水淡化和特殊废水的处理.
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| 关 键 词： | 阳离子交换膜 纳米二氧化硅 高浓度电解质溶液 输运系数 |
Ion Transport Properties of a New Cation-exchange Membrane |
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| ZUO Xing-tao,YU Shui-li,WANG Juan,BAO Rui-ling,XU Xia,XU Jun.Ion Transport Properties of a New Cation-exchange Membrane[J].China Water & Wastewater,2009,25(15). |
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| Authors: | ZUO Xing-tao YU Shui-li WANG Juan BAO Rui-ling XU Xia XU Jun |
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| Affiliation: | ZUO Xing-tao,YU Shui-li,WANG Juan,BAO Rui-ling,XU Xia,XU Jun(School of Municipal and Environmental Engineering,Harbin Institute of Technology,Harbin 150090,China) |
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| Abstract: | SiO2/PVDF/GMA cation-exchange membrane was prepared by blending method in order to improve membrane permselectivity of ions in electrolyte solution with high concentration and increase membrane antifouling performance.The results show that water uptake of the membrane with 0.28% silica is 26.2%,that is 62% higher than that without silica,and ion-exchange capacity increases by 60%,which indicates that the hydrophilicity of the membrane is improved.Membranes conductivity,permselectivity and counterion diffusi... |
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| Keywords: | cation-exchange membranes nano silica electrolyte solution with high concentra-tion transport coefficient |
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