Abstract In this study, a novel graphene nanoplates (GNPs) incorporated polyether block amide (PEBA) membrane was successfully prepared to be used for seawater desalination. Pervaporative desalination performances were performed in a temperature range of 35–65 °C. Effects of GNPs content in PEBA, membrane thickness, and temperature were evaluated in terms of the flux and total salt rejection. The long-term stabilities of the membranes were experimented. Incorporating graphene nanoplate into PEBA matrix enhanced flux and ion rejections simultaneously. Experimental stability of the membrane was improved by GNPs incorporation. Graphene incorporated membranes showed excellent seawater desalination performance with the salt rejection of > 99.89% and flux of > 2.58 kg/m2·h. Based on the flux and rejection results, optimum GNPs contents in PEBA matrix were observed as 2 wt% GNPs and 3 wt% GNPs. Increasing temperatures improved the water flux and did not significantly affect the salt rejection. The highest salt rejection was obtained as 99.94% with a flux of 2.58 kg/m2·h at 35 °C when the 3 wt% GNPs incorporated membrane was used. The nanohybrid membrane preserved 99.8% of its performance during 60 h, while the rejection performance of the pristine membrane decreased to 96.8%.

中文翻译：

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高性能石墨烯纳米片掺入聚醚嵌段酰胺膜的制备及其在海水淡化中的应用

摘要 在本研究中，成功​​制备了一种新型石墨烯纳米片 (GNPs) 并入聚醚嵌段酰胺 (PEBA) 膜，用于海水淡化。渗透蒸发脱盐性能在 35-65 °C 的温度范围内进行。根据通量和总脱盐率评估 PEBA 中 GNP 含量、膜厚度和温度的影响。对膜的长期稳定性进行了实验。将石墨烯纳米板结合到 PEBA 基质中可同时增强通量和离子排斥。膜的实验稳定性通过 GNP 的掺入得到改善。掺入石墨烯的膜显示出优异的海水淡化性能，脱盐率 > 99.89%，通量 > 2.58 kg/m2·h。基于通量和拒绝结果，观察到 PEBA 基质中的最佳 GNP 含量为 2 wt% GNP 和 3 wt% GNP。升高温度提高了水通量并且没有显着影响脱盐率。当使用 3 wt% 的 GNP 膜时，在 35 °C 下的通量为 2.58 kg/m2·h 时，盐截留率最高，为 99.94%。纳米混合膜在 60 小时内保持了 99.8% 的性能，而原始膜的截留性能下降到 96.8%。