Tailoring the microstructure of poly(vinyl alcohol)-intercalated graphene oxide membranes for enhanced desalination performance of high-salinity water by pervaporation
Tailoring the microstructure of poly(vinyl alcohol)-intercalated graphene oxide membranes for enhanced desalination performance of high-salinity water by pervaporation
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定制聚（乙烯醇）插层氧化石墨烯膜的微观结构以增强渗透蒸发高盐水的脱盐性能
DOI：
10.1016/j.memsci.2020.117838
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发表时间：
2020-04
影响因子：
9.5
通讯作者：
Li Na
中科院分区：
文献类型：
--
作者：
Sun Jiawei;Qian Xiaowei;Wang Ziheng;Zeng Feixiang;Bai Hongcun;Li Na
层压氧化石墨烯（GO）膜由于允许水通过可调节的层间纳米通道畅通无阻地渗透，因此在海水淡化方面具有广阔的前景。 GO膜实现高效、稳定的海水淡化性能至关重要。本文通过压力辅助过滤方法制备了由聚乙烯醇（PVA）插层交联并支撑在纤维素微滤膜上的GO膜，用于高盐水的渗透汽化淡化。通过寻找合适的交联插层 PVA 量，成功定制了 GO 膜的层间距和微观结构。探讨了纳米通道的微观结构，揭示了其对膜传质性能的影响。结果表明，GO-PVA 膜的渗透性取决于 GO 纳米片之间的 d 间距和 3D 交联网络。优化后的 GO-PVA 膜在 85 °C 的 10 wt% NaCl 溶液脱盐中表现出超过 98 kg/m2h 的出色水通量和 99.99% 的脱盐率。得益于PVA链与GO纳米片交联所提供的具有高粘附强度的GO层砖砂结构，该膜能够坚韧地抵抗超声破坏测试，并在渗透汽化中表现出稳定可靠的性能。该研究有助于理解和优化插层GO膜的内部结构构成，以实现高效分离。
Laminated graphene oxide (GO) membrane is promising in desalination owing to allowing unimpeded water permeation through the tunable interlayer nanochannels. To achieve highly efficient and stable desalination performance of GO membrane is crucial. Herein, GO membranes intercalated and cross-linked by poly(vinyl alcohol) (PVA) and supported on cellulose microfiltration membrane were fabricated via pressure-assisted filtration method for application in pervaporation desalination of high-salinity water. The interlayer spacing and microstructure of the GO membranes is successfully tailored by searching for appropriate intercalated PVA amount for cross-linking. The nanochannel microstructure was probed and its effect on the mass transport property of the membranes was revealed. The results show that the permeability of the GO-PVA membranes was dependent on both d-spacing and 3D cross-linking network between GO nanosheets. The optimized GO-PVA membranes displayed an outstanding water flux of over 98 kg/m2h and 99.99% salt rejection in desalinating 10 wt% NaCl solution at 85 °C. Benefiting from the formation of brick-mortar structure of GO layers with high adhesion strength provided by the cross-linked PVA chains with GO nanosheets, the membranes could toughly resist sonication destruction test and exhibited stable and reliable performance in pervaporation. The study helps understanding and optimizing the constitution of inner structure of intercalated GO membrane for efficient separation.
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影响因子：
--
作者：
Mengchen Zhang;Yangyang Mao;Guozhen Liu;Gongpin Liu;Yiqun Fan;W. Jin
通讯作者：
Mengchen Zhang;Yangyang Mao;Guozhen Liu;Gongpin Liu;Yiqun Fan;W. Jin
影响因子：
9.5
作者：
Fubing Peng;Lianyu Lu;Honglei Sun;Zhongyi Jiang
通讯作者：
Fubing Peng;Lianyu Lu;Honglei Sun;Zhongyi Jiang
影响因子：
16.6
作者：
Akbari A;Sheath P;Martin ST;Shinde DB;Shaibani M;Banerjee PC;Tkacz R;Bhattacharyya D;Majumder M
通讯作者：
Majumder M
硫脲交联氧化石墨烯骨架膜的自组装用于小分子的分离
影响因子：
29.4
作者：
Jingjing Yang;Dian Gong;Guihua Li;Gaofeng Zeng;Qiyan Wang;Yelei Zhang;Guojuan Liu;Ping Wu;Evgeny Vovk;Zheng Peng;Xiaohong Zhou;Yong Yang;Zhi Liu;Yuhan Sun
通讯作者：
Yuhan Sun
影响因子：
15
作者：
HUMMERS, WS;OFFEMAN, RE
通讯作者：
OFFEMAN, RE