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有机磷酸化TiO2改性阳离子交换膜的制备与性能

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周璇, 郑可, 周晓. 有机磷酸化TiO2改性阳离子交换膜的制备与性能[J]. 环境工程学报, 2019, 13(6): 1282-1291. doi: 10.12030/j.cjee.201810116
引用本文: 周璇, 郑可, 周晓. 有机磷酸化TiO2改性阳离子交换膜的制备与性能[J]. 环境工程学报, 2019, 13(6): 1282-1291. doi: 10.12030/j.cjee.201810116
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ZHOU Xuan, ZHENG Ke, ZHOU Xiao. Preparation and characterization of organophosphorylated TiO2 modified cation exchange membranes[J]. Chinese Journal of Environmental Engineering, 2019, 13(6): 1282-1291. doi: 10.12030/j.cjee.201810116
Citation: ZHOU Xuan, ZHENG Ke, ZHOU Xiao. Preparation and characterization of organophosphorylated TiO2 modified cation exchange membranes[J]. Chinese Journal of Environmental Engineering, 2019, 13(6): 1282-1291. doi: 10.12030/j.cjee.201810116
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有机磷酸化TiO2改性阳离子交换膜的制备与性能

  • 1.

    华南理工大学环境与能源学院，广州 510006

  • 2.

    贵州科学院，贵阳 550001

  • 基金项目:

    国家重点研发计划项目2016YFC0400705国家重点研发计划项目(2016YFC0400705)

Preparation and characterization of organophosphorylated TiO2 modified cation exchange membranes

  • 1.

    School of Environment and Energy, South China University of Technology, Guangzhou 510006, China

  • 2.

    Guizhou Academy of Sciences, Guiyang 550001, China

  • Fund Project:

  • 摘要: 通过添加有机磷酸化纳米二氧化钛(organophosphorylated titania nanoparticles，OPTi)的方法提高聚氯乙烯(PVC)阳离子交换膜的性能，先采用氨基三亚甲基膦酸通过磷氧化学键合将纳米二氧化钛有机磷酸化，再将制备好的OPTi与PVC粉末共混制备阳离子交换膜。通过X射线光电子能谱和傅里叶变换红外光谱分析OPTi的元素组成和表面特征官能团，通过扫描电镜研究了异相膜的表面和断面形貌。此外，还考察了不同OPTi的添加量对膜的含水率、离子交换量、机械性能和膜面电阻等性质的影响。结果表明，OPTi的加入使膜的固定电荷浓度、离子选择性和机械性能提高，膜面电阻大大降低并且在电渗析实验中，改性异相膜与原膜比较达到能耗降低26.68%、电流效率提高29.27%的显著效果。
    Abstract: In this study, the performance of polyvinyl chloride (PVC) cation exchange membrane (CEM) was obviously enhanced by incorporating organophosphorylated titania nanoparticles (OPTi). At first, pristine titania nanoparticles were phosphorylated by amino trimethylene phosphonic acid, then the formed OPTi was mixed with the powder of PVC to fabricate this modified membrane. The element composition and surface function groups of OPTi were determined through XPS and FT-IR. The surface and section morphologies of heterogeneous membrane were recorded by SEM. In addition, the effects of OPTi additive amount in the mixed material on the water uptake of membrane, ion exchange content, mechanical properties and membrane surface resistance were particularly investigated. Results showed that OPTi addition significantly elevated the concentration of fixed charges on the membrane surface, ion selectivity and mechanical properties, while reduced the resistance of membrane surface. Besides, in the electrodialysis test, this composite membrane exhibited a superior electrodialysis performance compared with pristine membrane, such as a reduction of 26.68% on energy consumption and an increase of 29.27% on current efficiency.
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  • 刊出日期:  2019-06-18

有机磷酸化TiO2改性阳离子交换膜的制备与性能

  • 1. 华南理工大学环境与能源学院，广州 510006
  • 2. 贵州科学院，贵阳 550001
基金项目:

国家重点研发计划项目2016YFC0400705国家重点研发计划项目(2016YFC0400705)

摘要: 通过添加有机磷酸化纳米二氧化钛(organophosphorylated titania nanoparticles，OPTi)的方法提高聚氯乙烯(PVC)阳离子交换膜的性能，先采用氨基三亚甲基膦酸通过磷氧化学键合将纳米二氧化钛有机磷酸化，再将制备好的OPTi与PVC粉末共混制备阳离子交换膜。通过X射线光电子能谱和傅里叶变换红外光谱分析OPTi的元素组成和表面特征官能团，通过扫描电镜研究了异相膜的表面和断面形貌。此外，还考察了不同OPTi的添加量对膜的含水率、离子交换量、机械性能和膜面电阻等性质的影响。结果表明，OPTi的加入使膜的固定电荷浓度、离子选择性和机械性能提高，膜面电阻大大降低并且在电渗析实验中，改性异相膜与原膜比较达到能耗降低26.68%、电流效率提高29.27%的显著效果。

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