Key Laboratory for Green Chemical Technology of Ministry of Education, School of Chemical Engineering and Technology, Tianjin University, Tianjin, P R China.
Environ Sci Technol. 2011 Aug 1;45(15):6545-52. doi: 10.1021/es200994n. Epub 2011 Jul 14.
In the present study, a facile in situ approach for constructing tunable amphiphilic or hydrophilic antifouling membrane surfaces was demonstrated by exquisitely manipulating the microphase separation and surface segregation behavior of the tailor-made ternary amphiphilic block copolymers during the commonly utilized wet phase inversion membrane-formation process. Under dead-end filtration for oily wastewater treatment, the membrane with amphiphilic surface exhibited over 99.5% retention ratio of chemical oxygen demand (COD) without appreciable membrane fouling: the water permeation flux was slightly decreased during operation (total flux decline was 6.8%) and almost completely recovered to the initial value (flux recovery ratio was more than 99.0%) after simple hydraulic washing. While for the proteins-containing wastewater treatment, the membrane with hydrophilic surface exhibited about 52.6% COD retention ratio and superior antifouling performance: only 17.0% total flux decline and also more than 99.0% flux recovery ratio. Hopefully, the present approach can be developed as a competitive platform technology for the preparation of robust and versatile antifouling membrane, leading to the high process efficiency of wastewater treatments.
在本研究中，通过巧妙地控制定制的三元两亲嵌段共聚物在常用的湿法相转化膜形成过程中的微相分离和表面分相行为，展示了一种构建可调两亲或亲水抗污染膜表面的简便原位方法。在用于处理含油废水的死端过滤中，具有两亲表面的膜对化学需氧量（COD）的截留率超过 99.5%，而膜污染可忽略不计：在运行过程中，水通量仅略有下降（总通量下降 6.8%），并且在简单水力清洗后几乎完全恢复到初始值（通量恢复率超过 99.0%）。而对于含有蛋白质的废水处理，具有亲水表面的膜表现出约 52.6%的 COD 截留率和优异的抗污染性能：仅总通量下降 17.0%，通量恢复率也超过 99.0%。希望本方法可以作为一种有竞争力的平台技术用于制备坚固且多功能的抗污染膜，从而实现废水处理的高工艺效率。
