期刊
JOURNAL OF MEMBRANE SCIENCE
卷 595, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.memsci.2019.117488
关键词
Membrane modification; Microalgae harvesting; Layer-by-layer assembly; Negatively charged membranes
资金
- National Natural Science Foundation of China [51508130]
- National Science and Technology Major Project [2017ZX07501002]
- State Key Laboratory of Urban Water Resource and Environment (Harbin Institute of Technology) [2017TS03]
To tailor low-biofouling membranes remains one of the most problematic issues in filtration for microalgae harvesting. The aim of this study is to develop a high negatively charged and hydrophilic membrane to reduce membrane fouling via bioinspired design and Layer-by-layer (LBL) self-assembly technique for the application in microalgae harvesting. Bioinspired adhesive based on the polydopamine and polyethylenimine (PDA/PEI) composite was first linked onto the neutrally charged PC membrane substrates, then the poly-(styrenesulfonate) (PSS)/poly-(diallyldimethylammonium chloride) (PDADMAC) layers were uniformly assembled by electrostatic attraction. The resultant highly negatively charged and hydrophilic PC membranes exhibit a zeta potential of -66.1 mV and a water contact angle of 26 degrees. Moreover, the modified membranes present a high average flux (133.1 Lm(2) h(-1).bar(-1)) in 1-h microalgae filtration, a high algae retention (similar to 100%) as well as a high flux recovery rate (over 94%). Meanwhile, the resultant membranes exhibit excellent chemical stability in high salty solutions, the low pH solutions and tolerance to long-time running in DI water. The combination of bioinspired construction method and LBL self-assembly technique could be expected to be a universal way to endow neutrally charged materials with highly negative or positive surface charge for various applications.
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