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材料研究学报  2026, Vol. 40 Issue (3): 225-233    DOI: 10.11901/1005.3093.2025.099
  研究论文 本期目录 | 过刊浏览 |
PPy-GO共沉积改性阴离子交换膜的制备和性能
刘俏君1,2, 周键1,2(), 张航飞1,2, 黄魁1
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
Modification of Anion Exchange Membrane via Co-deposition of Polypyrrole and Graphene Oxide
LIU Qiaojun1,2, ZHOU Jian1,2(), ZHANG Hangfei1,2, HUANG Kui1
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:

刘俏君, 周键, 张航飞, 黄魁. PPy-GO共沉积改性阴离子交换膜的制备和性能[J]. 材料研究学报, 2026, 40(3): 225-233.
Qiaojun LIU, Jian ZHOU, Hangfei ZHANG, Kui HUANG. Modification of Anion Exchange Membrane via Co-deposition of Polypyrrole and Graphene Oxide[J]. Chinese Journal of Materials Research, 2026, 40(3): 225-233.

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摘要: 

用聚吡咯(Polypyrrole, PPy)和氧化石墨烯(Graphene oxide, GO)对异质阴离子交换膜(Anion exchange membrane, AEM)进行共沉积表面改性,使用GO进行“碳催化”制备了PPy-GO复合层透过性膜。使用扫描电子显微镜(SEM)、电子衍射X射线光谱(EDX)、红外光谱(FTIR)、X射线光电子能谱(XPS)等手段表征了改性膜的表面形貌和理化性质。结果表明,随着GO浓度的提高改性膜的含水率、离子交换容量均有所提高,接触角明显减小;适当的提高NaCl溶液的浓度有利于提高改性效果;1~5 mA/cm2的电流密度有利于制备出性能优异的改性膜。在电流密度为5 mA/cm2、PPy∶GO = 2∶1、NaCl的浓度为0.3 mol/L和沉积时间为20 min的条件下制备的PPy-GO-M膜,其离子交换容量比原膜提高0.85 mmol/g,接触角下降42.7°,膜电阻下降3.58 Ω,选择透过性提高4.66%。

关键词 材料合成与加工工艺高选择透过性共沉积氧化石墨烯聚吡咯    
Abstract

A composite material (PPy-GO) film with high selectivity for permeability was prepared on an anion exchange membrane (AEM) via co-deposition method with polypyrrole (PPy) and graphene oxide (GO) as raw material, resulting in a new type of composite anion exchange membrane, while the "carbon catalysis" effect of GO also played a significant role during the process. The surface morphology and physicochemical properties of the membrane were characterized using scanning electron microscopy, energy-dispersive X-ray spectroscopy, Fourier transform infrared spectroscopy, and X-ray photoelectron spectroscopy, so that to determine the optimal conditions for the co-deposition of PPy-GO on the membrane surface. The results show that with the increasing GO concentration, the water content and ion exchange capacity of the modified membrane increased, while the contact angle significantly decreased. An appropriate increase in the NaCl solution concentration was found to be beneficial for improving the modification effect. The current density in the range of 1-5 mA/cm2 had a positive impact on the performance of the modified membrane. Under optimized deposition conditions (current density of 5 mA/cm2, PPy:GO ratio of 2:1, 0.3 mol/L NaCl, deposition time of 20 min), compared to the unmodified membrane, the PPy-GO modified membrane exhibited an increase in ion exchange capacity by 0.85 mmol/g, a decrease in contact angle by 42.7°, a reduction in membrane resistance by 3.58 Ω, and a 4.66% increase in selectivity for permeability.

Key wordssynthesizing and processing technics for materials    highly selective permeability    co-deposition    graphene oxide    polypyrrole
收稿日期: 2025-03-07     
ZTFLH:  TQ317  
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(2024-CXPT-14);甘肃省高校产业支撑计划(2024CYZC-26)
通讯作者: 周键,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: 13609344897, E-mail: zhoujian@mail.lzjtu.cn
作者简介: 刘俏君,女,1998年生,硕士
图1  迁移数测试装置示意图
图2  四电极体系电化学阻抗测试系统
图3  PPy-GO配比对改性膜表面性质的影响
图4  氯化钠浓度对改性膜表面性质的影响
图5  电流密度对改性膜表面性质的影响
Membranetype

Thickness

/ mm

Water uptake/ %Ion exchange capacity/ mmol·g-1Contact angle/ (°)

Resistance

/ Ω

Permeability

/ %

PM0.38-0.4229.711.89123.211.1492.65
PPy-GO-M0.439.412.7480.57.5697.31
表1  原膜和改性膜的基础性能
图6  原膜和改性膜表面、断面的SEM照片、碳和氮元素EDX
SampleCON
PM96.903.100.00
PPy-GO-M80.209.2010.50
表2  原膜和改性膜表面元素的含量
图7  原膜和改性膜的红外光谱、改性膜的Raman光谱、原膜C 1s光谱和改性膜的C 1s光谱
图8  共沉积反应机理示意图
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