SGO/PVDF-g-PSSA复合质子交换膜的制备及抗污染性研究

为更好的提高PVDF-g-PSSA质子交换膜的性能，将磺化氧化石墨烯（SGO）与PVDF-g-PSSA共聚物混合制得SGO/PVDF-g-PSSA复合质子交换膜.用傅里叶变换红外光谱（FTIR）、X射线光电子能谱（XPS）以及X射线测定仪（XRD）证实了GO的成功磺化.对复合膜进行SEM表征并考察了复合膜的主要性能，得到了最佳SGO掺加量.使用耗散型石英晶体微天平（QCM-D）研究了复合膜的抗污染性能.实验结果表明：当SGO添加量为1.0%时，复合膜的含水率达到44.34%，质子传导率为0.085S/cm，综合性能达到最佳.QCM-D实验表明，在纯水和50mmol/L PBS条件下，复合膜表面的BSA吸附量均最低，且|ΔD/ΔF|最大，说明吸附层较为疏松，复合膜具有较好的抗污染性.

Preparation and characterization of SGO/PVDF-g-PSSA composite proton exchange membrane and its anti-fouling properties

In order to improve the performance of PVDF-g-PSSA proton exchange membrane, SGO/PVDF-g-PSSA composite proton exchange membrane was prepared by mixing sulfonated graphene oxide (SGO) with PVDF-g-PSSA copolymer. Fourier transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS) and X-ray detector (XRD) were used to confirm the successful sulfonation of GO. The composite membrane was characterized by SEM and the main properties of the composite membranes were investigated. The optimal SGO dosing amount was obtained. The dissipative quartz crystal microbalance (QCM-D) was used to investigate the anti-fouling performance of the composite membranes. The results showed that when the SGO addition amount was 1.0%, the overall performance of composite membrane was optimized, the water content reached 44.34%, and the proton conductivity was 0.085S/cm. The QCM-D experiments showed that the BSA adsorption amount on the surface of the composite membrane was the lowest under pure water and 50mmol/L PBS, and |ΔD/ΔF| was the largest, indicating that the adsorption layer was loose and the composite membrane had better anti-fouling properties.