期刊
SEPARATION AND PURIFICATION TECHNOLOGY
卷 236, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.seppur.2019.116239
关键词
Continuous ZIF-8 layer; In-situ growth; Composite membrane; Antibacterial; Forward osmosis
资金
- National Natural Science Foundation of China [21576146]
- Talent Fund of Shandong Collaborative Innovation Center of Eco-Chemical Engineering [XTCXQN12]
Metal-organic frameworks (MOFs), being a type of the most representative porous nanomaterials, have been regarded as a promising candidate to fabricate antibacterial separation membrane attributing to their high porosity, tunable pore size and chemical functionality. Comparing with the traditional blending techniques, depositing a continuous and coherent MOF crystal layer on top of the membrane can fully exploit the functionality of the materials. In this study, we constructed a continuous zeolite imidazole framework-8 (ZIF-8) crystal layer on the surface of flexible polysulfone (PS) membrane pre-modified by polydopamine (PDA) via a facile immersion strategy. The characterization results confirmed the formation of a continuous ZIF-8 coating layer, which significantly increases the roughness of composite membrane from 17.2 nm to 154.0 nm compared with PDA/PS substrates. The ZIF-8 layer deposited on the surface of the PDA/PS membrane reduced the contact angle value from 45.4 degrees to 38.6 degrees based on the properties of Janus membrane. As a result, the ZIF-8/PDA/PS composite membranes showed a high water flux of 9.6 L/m(2).h and a low solute reverse flux of 3.8 g/m(2).h using 1 M MgCl2 as draw solution and DI water as feed solution under forward osmosis mode. In addition, the composite membranes also exhibited a satisfactory antimicrobial performance against Escherichia coli (E. coli) with antibacterial efficiency almost 99%, which is much higher than PDA/PS membrane (64%). This work demonstrates a facile way to ZIF-8/PDA/PS composite membranes with good FO performance and excellent antibacterial capacities.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据