Stability of electrically conductive membranes (ECM) is critical for expanding their application in separation-based technologies. In this work, ECMs were synthesized by coating polyethersulfone membranes with carbon nanotubes (CNT) crosslinked to polyvinyl alcohol (PVA) using two types of crosslinkers (succinic acid or glutaraldehyde). ECMs demonstrated a 21% reduction in flux over 4 h under cathodic potential (2 V) in comparison to a 69% reduction in flux for control experiments when filtering a realistic bacterial suspension. Subsequently, the electrochemical, physical, and mechanical stability of the ECMs were explored using chronoamperometry and cyclic voltammetry, an evaluation of polymer leaching from membranes, and micro mechanical scratch testing, respectively. ECMs were shown to be unstable under anodic potentials (2–4 V) with the glutaraldehyde crosslinking demonstrating the highest electrochemical stability. PVA was shown to be a physically unstable crosslinking agent for CNTs under concentration polarization conditions. Instability was moderated by extending CP layers through thicker and less dense nanolayers. ECMs showed higher mechanical stability and resistance to surface damage, in particular when coated with glutaraldehyde. We quantified the relationship between ECM surface instability and their physical and electrochemical properties. In so doing, we provide guidance for making practical and scalable electrically conductive membranes.

导电膜（ECM）的稳定性对于扩大其在基于分离的技术中的应用至关重要。在这项工作中，通过使用两种类型的交联剂（丁二酸或戊二醛）在聚醚砜膜上涂以与聚乙烯醇（PVA）交联的碳纳米管（CNT）来合成ECM。在过滤实际细菌悬浮液时，ECMs在阴极电势（2 V）下在4小时内的通量减少了21％，而对照实验的通量减少了69％。随后，分别使用计时安培法和循环伏安法，评估从膜中浸出的聚合物以及进行微机械刮擦测试，探索了ECM的电化学，物理和机械稳定性。ECMs在阳极电势（2-4 V）下表现出不稳定，戊二醛交联具有最高的电化学稳定性。在浓差极化条件下，PVA被证明是碳纳米管的一种物理不稳定的交联剂。通过将CP层延伸穿过较厚且密度较小的纳米层，可以缓解不稳定性。ECM表现出更高的机械稳定性和抗表面损伤性，特别是当涂有戊二醛时。我们量化了ECM表面不稳定性与其物理和电化学性质之间的关系。在此过程中，我们为制造实用且可扩展的导电膜提供了指导。在浓差极化条件下，PVA被证明是碳纳米管的一种物理不稳定的交联剂。通过将CP层延伸穿过较厚且密度较小的纳米层，可以缓解不稳定性。ECM表现出更高的机械稳定性和抗表面损伤性，尤其是在涂有戊二醛的情况下。我们量化了ECM表面不稳定性与其物理和电化学性质之间的关系。在此过程中，我们为制造实用且可扩展的导电膜提供了指导。在浓差极化条件下，PVA被证明是碳纳米管的一种物理不稳定的交联剂。通过将CP层延伸穿过较厚且密度较小的纳米层，可以缓解不稳定性。ECM表现出更高的机械稳定性和抗表面损伤性，尤其是在涂有戊二醛的情况下。我们量化了ECM表面不稳定性与其物理和电化学性质之间的关系。在此过程中，我们为制造实用且可扩展的导电膜提供了指导。我们量化了ECM表面不稳定性与其物理和电化学性质之间的关系。在此过程中，我们为制造实用且可扩展的导电膜提供了指导。我们量化了ECM表面不稳定性与其物理和电化学性质之间的关系。在此过程中，我们为制造实用且可扩展的导电膜提供了指导。