Highly hydrophilic thin-film composition forward osmosis (FO) membranes functionalized with aniline sulfonate/bisulfonate for desalination
Highly hydrophilic thin-film composition forward osmosis (FO) membranes functionalized with aniline sulfonate/bisulfonate for desalination
复制标题
用于脱盐的用苯胺磺酸盐/磺酸氢盐功能化的高亲水性薄膜组合物正向渗透（FO）膜
DOI：
10.1016/j.memsci.2018.07.046
复制
发表时间：
2018-10-15
影响因子：
9.5
通讯作者：
Ge, Qingchun
中科院分区：
文献类型：
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作者：
Ni, Tingting;Ge, Qingchun
在水处理中，适当的膜是最大限度地发挥正向渗透(FO)潜力的关键。本研究通过化学改性制备了高性能、高结构的薄膜复合(TFC)FO膜，用于FO海水淡化。新开发的膜由苯磺酸盐/双磺酸盐功能化聚酰胺层组成，通过界面聚合在聚醚砜(PES)载体上形成。通过伯胺和酰氯之间的酰化反应，将苯磺酸盐/双磺酸盐共价键合到新生的聚酰胺层上。新型膜具有更多的亲水性和更光滑的表面，这对于提高抗污染能力非常重要，从而有助于改善水传递速率。2，5-二磺基苯胺二钠(DSA-2Na)改性膜在PRO(面向活化层的取液)和FO(面向活化层的料液)模式下的出水通量分别比原膜高71.5%和52.0%。以模拟海水为原料，以2.0M氯化镁为拉伸液，DSA-2Na改性膜的水通量为16.7LMH(FO模式)，比原膜的12.3LMH提高了36%。这与已报道的海水淡化最佳值相当，表明芳香磺酸盐/双磺酸盐材料功能化膜在FO膜分离中的优越性。
Appropriate membranes are crucial to maximize the potential of forward osmosis (FO) in water treatment. In this study, high-performance and well-constructed thin-film composite (TFC) FO membranes were developed via chemical modifications for FO desalination. The newly developed membranes consist of an aniline sulfonate/bisulfonate functionalized polyamide layer formed by interfacial polymerization on a poly(ether sulfone) PES) support. Aniline sulfonate/bisulfonates were covalently bonded to the nascent polyamide layer by the acylation reaction between primary amine and acyl chloride groups. The novel membranes have more hydrophilic and smoother surfaces which are important to increase antifouling capability, thus conducing to improved water transfer rates. The 2,5-disulfoaniline disodium salt (DSA-2Na) modified membrane produced water fluxes 71.5% and 52.0% higher than the pristine membrane under the respective PRO (draw solution facing the active layer) and FO (feed solution facing the active layer) modes against DI water. With simulated seawater as the feed and 2.0M MgCl2 as the draw solution, DSA-2Na modified membrane created a water flux of 16.7 LMH (FO mode), a 36% increase compared to the pristine membrane with a water flux of 12.3 LMH. This is comparable to the best value reported for seawater desalination, indicating the superiority of the aromatic sulfonate/bisulfonate materials functionalized membranes in FO membrane separation.