基于四元氨基功能化聚乙烯和 ((IV) 酸盐的复合离子交换膜,具有改进的单价离子选择性和防性质
Andrey Manin1,2, Daniel Golubenko1, Svetlana Novikova1,2
1Kurnakov Institute of General and Inorganic Chemistry RAS, Leninskii Prospekt 31, Moscow 119071, Russia.
Membranes
|July 28, 2023
概括
研究人员用酸纳米粒子增强了离子交换膜. 这种修改提高了电透析淡化过程中对单价离子的选择性,并增加了对表面活性剂的抗性.
科学领域:
- 材料科学 材料科学 材料科学
- 电化学 电化学 电化学
- 纳米技术纳米技术
背景情况:
- 离子交换膜对于脱盐等分离过程至关重要.
- 用纳米颗粒修改膜性质为提高性能提供了一条途径.
- 四级功能化的聚钢膜被广泛使用,但可以改进.
研究的目的:
- 为了研究酸纳米颗粒对阳离子交换膜的影响.
- 评估对物理化学和运输性能的影响.
- 评估电透析淡化和表面活性剂耐受性的性能.
主要方法:
- 将酸纳米颗粒纳入Ralex® AM和Neosepta® AMX膜中.
- 酸通过从氨酸的沉合成酸.
- 使用FTIR,P31 MAS NMR,EDX映射和SEM进行表征.
- 在NaCl/Na2SO4混合物的ED淡化中测试膜选择性.
主要成果:
- 在结构上证实了酸纳米颗粒的纳入.
- 混合膜在ED淡化过程中对单价离子的选择性增加.
- 获得了4.9 (Ralex® AM) 和7.7 (Neosepta® AMX) 的最大选择性.
- 基于Neosepta® AMX的膜表现出对二甲基硫酸盐的增强抵抗力.
结论:
- 酸纳米粒子有效地修改了阳离子交换膜.
- 混合膜表现出更好的离子选择性和表面活性剂耐受性.
- 这种方法为分离技术中先进的膜应用提供了潜力.
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