Cross-linking can effectively solve the conductivity-swelling dilemma in anion exchange membranes (AEMs) but will generate solid wastes. To address this, we developed an AEM cross-linked via disulfide bonds, bearing quaternary ammonium groups, which can be easily recycled. The membrane (RC-QPPO) with IEC of 1.78 mmol g⁻¹, when cross-linked, showed enhanced mechanical properties and good hydroxide conductivity (24.6 mS cm⁻¹ at 30 °C). Even at higher IEC value (2.13 mmol g⁻¹), it still has low water uptake, low swelling ratio and delivers a peak power density of 150 mW cm⁻² at 65 °C. Exploiting the formation of disulfide bonds from -SH groups, the membrane can be readily cross-linked in alkaline condition and recycled by reversibly breaking disulfide bonds with dithiothreitol (DTT). The recycled membrane solution can be directly utilized to cast a brand-new AEM. By washing away the residual DTT with water and exposure to air, it can be cross-linked again and this process is repeatable. During the recycling and cross-linking processes, the membrane showed a slight IEC decrease of 5% due to functional group degradation. The strategy presented here is promising in enhancing AEM properties and reducing the impact of artificial polymers on the environment.

交联可以有效解决阴离子交换膜（AEM）中电导率膨胀的难题，但会产生固体废物。为了解决这个问题，我们开发了一种通过二硫键交联的AEM，它带有季铵基团，可以很容易地回收利用。交联时，IEC为1.78 mmol g ^-1的膜（RC-QPPO）显示出增强的机械性能和良好的氢氧化物传导性（在30°C下为24.6 mS cm ^-1）。即使在更高的IEC值（2.13 mmol g ^-1）下，它的吸水率，溶胀率仍然较低，并且峰值功率密度为150 mW cm ^-2在65°C下。利用-SH基团形成的二硫键，该膜可以在碱性条件下轻松交联，并通过与二硫苏糖醇（DTT）可逆地破坏二硫键进行回收利用。回收的膜解决方案可以直接用于铸造全新的AEM。通过用水冲洗残留的DTT并将其暴露在空气中，可以将其再次交联，此过程是可重复的。在回收和交联过程中，由于官能团的降解，膜的IEC轻微降低了5％。本文提出的策略在增强AEM性能和减少人造聚合物对环境的影响方面很有希望。