Modifying thin film composite membrane with zeolitic imidazolate framework-8@polydopamine for enhanced antifouling property
Modifying thin film composite membrane with zeolitic imidazolate framework-8@polydopamine for enhanced antifouling property
复制标题
沸石咪唑酯骨架-8@聚多巴胺改性薄膜复合膜增强防污性能
DOI：
10.1016/j.chemosphere.2020.125956
复制
发表时间：
2020
期刊：
影响因子：
8.8
通讯作者：
Yang Leilei
中科院分区：
文献类型：
--
作者：
Zhang Gehong;Zhang Jie;Lv Pinghai;Sun Jian;Zhao Pingge;Yang Leilei
生物污染和有机污染是聚合物膜在应用过程中的主要障碍。本研究采用水相合成策略制备了咪唑酸沸石framework-8@polydopamine （ZIF-8@PDA）纳米颗粒，并将其加入聚酰胺（PA）选择层中，在界面聚合过程中合成薄膜纳米复合膜（TFN）。引入ZIF-8@PDA后，复合膜的渗透性和选择性同时得到提高。TFN膜的透水性为3.74±0.19 L/(m2·h·bar)，比对照膜提高了43.8%。TFN膜对氯化钠的去除率为98.68±0.13%，比未改性膜提高0.99%。此外，由于亲水性物质ZIF-8@PDA的引入，TFN膜的有机污染和生物污染也得到了缓解。短期过滤结果表明，TFN膜在运行过程中性能稳定。
Biofouling and organic fouling are major obstacles for polymeric membranes during application. In this work, zeolitic imidazolate framework-8@polydopamine (ZIF-8@PDA) nanoparticles were prepared by an aqueous synthesis strategy and incorporated into the polyamide (PA) selective layer to synthesize thin film nanocomposite membrane (TFN) during interfacial polymerization. The permeability and selectivity of the composite membrane were simultaneously improved with the introduction of ZIF-8@PDA. The water permeability of the TFN membrane increased to 3.74 ± 0.19 L/(m2·h·bar), which is 43.8% higher than that of the control membrane. Besides, the rejection of TFN membrane to sodium chloride is 98.68 ± 0.13%, which shows 0.99% increment than the unmodified membrane. Moreover, organic fouling and biofouling of the TFN membrane were also alleviated thanks to the introduction of the hydrophilic ZIF-8@PDA. The short-term filtration results indicate the performance of the TFN membrane is stable during operation.