异质离子交换膜具有增强的离子导电性,用于连续电解离
1Department of Green Chemical Engineering, College of Engineering, Sangmyung University, Cheonan 31066, Republic of Korea.
Membranes
|December 22, 2023
概括
这项研究优化了离子交换膜 (AEM) 进行连续电离 (CEDI) 通过调整离子交换树脂 (IER) 含量和离子交换树脂 (IER) 结合物的特性. 新的AEM显示出更好的性能,更低的阻力和更低的能源消耗,用于生产超纯水.
科学领域:
- 材料科学 材料科学 材料科学
- 化学工程是化学工程的重要组成部分.
- 水处理 处理水的方法
背景情况:
- 连续电极电离 (CEDI) 对于超纯水的生产至关重要.
- 异质离子交换膜 (AEM) 是CEDI系统的关键组件.
- 提高AEM性能对于高效净化水是必不可少的.
研究的目的:
- 为了优化异质AEM的制造参数,使用离子体粘合剂来提高CEDI性能.
- 调查离子聚合物离子交换能力 (IEC) 和离子交换树脂 (IER) 含量对AEM特性的影响.
- 开发具有改进的离子导电性,机械强度和离子去除效率的AEM.
主要方法:
- 聚二二甲基-1,4-氧化物 (PPO) 被四分化,以创建具有不同IEC的离子体结合剂.
- 根据离子体结合剂的IEC,确定了IER粉的最佳含量.
- 交叉连接四分化PPO (QPPO) 纳米纤维粉末作为添加剂被纳入.
- 制造的AEM的特点是电阻,抗拉强度和离子输送数.
- 在CEDI实验中评估了性能,测量了离子去除率和能耗.
主要成果:
- 与传统膜相比,以较低的IEC离子体粘合剂和较低的IER含量实现了最佳的AEM性能.
- 优化膜的电阻 (4.6 Ω cm2) 比商业膜 (13.6 Ω cm2) 低得多.
- 膜表现出中等的抗拉强度 (9.7 MPa),高的运输数 (约. 0.97),更高的离子去除率 (99.86%),以及更低的能耗 (0.35千瓦时).
结论:
- 用优化的离子体结合剂IEC和IER内容制造的异质AEM为CEDI提供了卓越的性能.
- 添加QPPO纳米纤维增强了离子导电性,而不会损害机械完整性.
- 开发的AEM代表了高效和成本效益的超纯水生产的重大进步.
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