Zhang Xin, Zhang Ming-Xiao, Ding Hao, Yang Hu, Ma Xiao-Hua, Xu Xin-Ru, Xu Zhen-Liang, Tang Chuyang Y
Shanghai Key Laboratory of Multiphase Materials Chemical Engineering, Membrane Science and Engineering R&D Lab, Chemical Engineering Research Center, School of Chemical Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, China.
UNESCO Centre for Membrane Science and Technology, School of Chemical Engineering and UNSW Water Research Centre, School of Civil and Environmental Engineering, University of New South Wales, Sydney, New South Wales 2052, Australia.
ACS Omega. 2019 Sep 6;4(12):15043-15050. doi: 10.1021/acsomega.9b01833. eCollection 2019 Sep 17.
Graphene oxide (GO), as a two-dimensional structure material, has attracted widespread attention in the field of molecule sieving. However, GO-based membranes usually exhibit undesirable separation performance because the microstructure of GO is difficult to adjust. Herein, a novel double-crosslinking strategy for tuning the interlayer spacing of GO is reported. The hybrid membrane fabricated by the double-crosslinking strategy was used for pervaporation (PV) dehydration of isopropanol. To achieve high-performance of the PV hybrid membranes, the effects of operating cycles, chitosan concentration, and GO concentration were systematically investigated. The PV hybrid membranes were characterized by Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, water contact angle measurement, and scanning electron microscopy. The results demonstrate that the interlayer of GO can be adjusted successfully by the double-crosslinking strategy. The fabricated hybrid membrane containing 0.1 wt % GO exhibited excellent performance with a flux of 4391 g/mh and a separation factor of 1491, which indicated that the double-crosslinking strategy may extend the applications of GO in the field of membrane separation.
氧化石墨烯（GO）作为一种二维结构材料，在分子筛分领域引起了广泛关注。然而，基于GO的膜通常表现出不理想的分离性能，因为GO的微观结构难以调节。在此，报道了一种用于调节GO层间距的新型双交联策略。通过双交联策略制备的杂化膜用于异丙醇的渗透汽化（PV）脱水。为了实现PV杂化膜的高性能，系统研究了操作循环次数、壳聚糖浓度和GO浓度的影响。通过傅里叶变换红外光谱、X射线光电子能谱、水接触角测量和扫描电子显微镜对PV杂化膜进行了表征。结果表明，通过双交联策略可以成功调节GO的层间结构。制备的含有0.1 wt% GO的杂化膜表现出优异的性能，通量为4391 g/m²h，分离因子为1491，这表明双交联策略可能会扩展GO在膜分离领域的应用。
