Thin-film composite membranes comprising ultrathin hydrophilic polydopamine interlayer with graphene oxide for forward osmosis
Thin-film composite membranes comprising ultrathin hydrophilic polydopamine interlayer with graphene oxide for forward osmosis
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DOI：
10.1016/j.desal.2018.10.012
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发表时间：
2019-01-01
期刊：
影响因子：
9.9
通讯作者：
Park, Hosik
中科院分区：
文献类型：
--
作者：
Choi, Hyeon-gyu;Shah, Aatif Ali;Park, Hosik
在这项研究中，薄膜复合材料（TFC）膜与聚砜（PSI）支持层，包括一个无规聚多巴胺/氧化石墨烯（PDA/GO）中间层，通过相转化，自聚合，和界面聚合，以提高水渗透性的TFC膜的正渗透（FO）应用。由于PDA和GO的亲水性官能团，支撑层的表面表现出更大的亲水性。对于较长的PDA涂覆时间，渗透性由于PDA和GO的孔堵塞而降低。当PDA/GO的质量浓度为0.5 g/L、涂覆时间为1 h时，膜的水通量提高了57.6%，而反向溶质通量没有明显损失。本研究的结果预计将有助于开发的TFC FO膜含有亲水性夹层，以实现水处理和海水淡化的膜性能的改善。
In this study, a thin-film composite (TFC) membrane with a polysulfone (PSI) support layer comprising an ultrathin polydopamine/graphene oxide (PDA/GO) interlayer was fabricated by phase inversion, self-polymerization, and interfacial polymerization to improve water permeability of the TFC membrane for forward osmosis (FO) application. The surface of the support layer exhibited greater hydrophilicity because of the hydrophilic functional groups of PDA and GO. For longer PDA coating time, the permeability decreased due to pore blocking by PDA and GO. The TFC membrane with the PSf support layer coated with the PDA/GO interlayer showed great improvement of water flux (57.6%) without severe loss of the reverse solute flux under an optimum condition of 1 h of PDA coating time and 0.5 g/L of GO concentration. The results of this study are expected to contribute to the development of TFC FO membranes containing a hydrophilic interlayer to achieve improved membrane performance for water treatment and seawater desalination.