<strong>DA-PEI</strong>共沉积表面改性阳离子交换膜的制备

doi:10.11901/1005.3093.2024.033

材料研究学报

2024, Vol. 38

Issue (8): 585-592 DOI: 10.11901/1005.3093.2024.033

研究论文

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DA-PEI共沉积表面改性阳离子交换膜的制备

周键¹^,²(

), 夏蒙玥¹^,², 张航飞¹^,², 刘俏君¹^,²

^1.兰州交通大学环境与市政工程学院兰州 730070
^2.寒旱地区水资源综合利用教育部工程研究中心兰州 730070

Preparation of Dopamine and Polyethyleneimine Co-deposition Modified Cation Exchange Membrane

ZHOU Jian¹^,²(

), XIA Mengyue¹^,², ZHANG Hangfei¹^,², LIU Qiaojun¹^,²

^1.College of Environmental and Municipal Engineering, Lanzhou Jiaotong University, Lanzhou 730070, China
^2.Ministry of Education Engineering Research Center of Water Resource Comprehensive Utilization in Cold and Arid Regions, Lanzhou 730070, China

引用本文:

周键, 夏蒙玥, 张航飞, 刘俏君. DA-PEI共沉积表面改性阳离子交换膜的制备[J]. 材料研究学报, 2024, 38(8): 585-592.
Jian ZHOU, Mengyue XIA, Hangfei ZHANG, Qiaojun LIU. Preparation of Dopamine and Polyethyleneimine Co-deposition Modified Cation Exchange Membrane[J]. Chinese Journal of Materials Research, 2024, 38(8): 585-592.

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摘要:

基于贻贝仿生粘合剂多巴胺(Dopamine，DA)和聚乙烯亚胺(Polyethyleneimine，PEI)共沉积制备了阳离子交换膜并使用红外光谱仪、扫描电子显微镜和紫外可见分光光度计等手段表征其性能，研究了DA与PEI浓度比对改性膜性能的影响。结果表明，随着PEI浓度的提高改性膜的选择透过性和膜电阻呈先增加后降低趋势，而改性膜的氧化百分比呈先下降后提高的趋势。DA与PEI浓度比为1∶1的改性膜其氧化百分比和膜电阻较低，含水率和离子交换容量分别为48.68%和2.49 mmol/g，选择透过性高达97.8%，比原膜提高了8.08%。

关键词 ：有机高分子材料, 离子交换膜, 共沉积, 高选择透过性

Abstract：

The cation exchange membrane was prepared by co-deposition of Dopamine (DA) and Polyethyleneimine (PEI) based on mussel bionic binders, and its properties were characterized by infrared spectrometer, scanning electron microscope, and UV visible spectrophotometer. The effect of DA to PEI concentration ratio on the performance of the modified membrane was studied. The results showed that with the increase of PEI concentration, the selective permeability and membrane resistance increased first and then decreased, while the oxidation percentage of the modified membrane decreased first and then increased. When the concentration ratio of DA to PEI was 1:1, the modified membrane had lower oxidation percentage and membrane resistance. Accordingly, the water content and ion exchange capacity were 48.68% and 2.49 mmol/g, respectively, and the selective permeability was up to 97.8%, that is 8.08% superior to the original membrane.

Key words： organic polymer materials ion exchange membrane co-deposition high selective permeability

收稿日期: 2024-01-11

ZTFLH:

TQ028

基金资助:国家自然科学基金(52364055);甘肃省教育厅：高校科研创新平台重大培育项目(2024CXPT-14);兰州交通大学“天佑青年托举人才计划”基金

通讯作者: 周键，副教授，zhoujian@mail.lzjtu.cn，研究方向为水处理功能材料制备

Corresponding author: ZHOU Jian, Tel: (0931)4956083, E-mail: zhoujian@mail.lzjtu.cn

作者简介: 周键，男，1984年生，博士

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表1 商用阳膜的性能参数

图1 测试装置的等效图

图2 在不同条件下DA的紫外-可见光谱

图3 不同DA与PEI浓度比溶液的紫外-可见光谱

图4 DA-PEI共沉积反应的原理图

图5 不同DA与PEI浓度比对改性膜含水率和离子交换容量的影响

图6 DA与PEI浓度比对改性膜迁移数和选择透过性的影响

图7 DA与PEI浓度比对改性膜抗氧化性和膜电阻的影响

图8 原膜和不同浓度比的改性膜的SEM照片

表2 原膜和改性膜表面元素的含量

图9 原膜和改性膜的EDS元素面扫描图

图10 原膜和不同DA与PEI浓度比的改性膜的红外光谱

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