铜纳米线导电微滤膜的制备、性质表征及应用

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Abstract

In this manuscript, the Cu-NWs conductive microfiltration membrane, obtained via phase inversion method, was prepared by dosing moderate Cu-nanowires (Cu-NWs) into conventional polyvinylidene fluoride (PVDF) casting solution. The filtration and conductivity properties of obtained conductive membrane were characterized. Finally, the efficiency of pollutant removal and membrane fouling behaviour were investigated in a membrane bioreactor (MBR) system with the prepared conductive microfiltration membrane for long-term operation. It provided a new route for the stable operation of MBR system with low cost. With dosing a certain amount of Cu-NWs, the membrane flux of prepared conductive microfiltration membrane was 721.9L/(m²·h) and its surface contact angle was 57.9°, which were better than those of commercial PVDF microfiltration membrane. The initial potential, ohmic resistance and activation resistance were 315mV, 2.4Ω and 6.9Ω, respectively. The scanning electron microscope (SEM) observation showed an excellent conductive network in the active layer of membrane. The removal rates of the established MBR system with prepared conductive microfiltration membrane were 91.5% for chemical oxygen demand (COD), 99.3% for NH₄⁺-N, 76.3% for total nitrogen (TN) and 76.2% for total phosphorus (TP), which were higher than those of the control MBR system. Over 146-d operation, the TMP was always lower than 25kPa and the membrane cleaning was not needed. The Fourier transformation infrared spectrometer (FTIR) analysis showed that the main contaminants on the membrane surface were proteins and polysaccharides, and the content of EPS on membrane surface was much lower than that of commercial PVDF membrane. The novel Cu-NWs conductive microfiltration membrane with good stability, durability and antifouling property showed a promising prospect.

Key words： Cu-nanowires conductive microfiltration membrane electrical conductivity antifouling property

Received: 27 February 2018

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	Articles by authors
	YIN Xia-fei
	LI Xiu-fen
	HUA Zhao-zhe
	REN Yue-ping
	WANG Xin-hua

Cite this article:

YIN Xia-fei,LI Xiu-fen,HUA Zhao-zhe等. Preparation, characterization and application of Cu-nanowires conductive microfiltration membrane[J]. CHINA ENVIRONMENTAL SCIENCECE, 2018, 38(10): 3729-3738.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2018/V38/I10/3729

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