期刊
JOURNAL OF MEMBRANE SCIENCE
卷 535, 期 -, 页码 94-102出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.memsci.2017.04.029
关键词
Ultrathin electrospun nanofibrous membrane; Electrospraying; Multi-wall carbon nanotubes; High flux; Dye removal
资金
- Qaidam Salt Chemical Joint Fund of National Natural Science Foundation of China - People Government of Qinghai Province [U1607117]
- Natural Science Foundation of Tianjin [15JCZDJC38500, 16JCZDJC36400]
- Science and Technology Plans of Tianjin [15PTSYJC00230]
A gradient composite membrane has been put forward in this paper, which is cost-efficient and remarkable to solve the problem of inherent tradeoff between flux and selectivity. The hierarchical composite membrane exhibited an ideal morphology, which was comprised of oxidized multi-wall carbon nanotubes (OMWCNTs) functional layer built via electrospraying, ultrathin electrospun polyacrylonitrile (PAN) midlayer and microfibrous polypropylene (PP) nonwoven support. Experimental results showed that when the additive amount of OMWCNTs was 1 wt%, the composite membranes presented an excellent flux (up to 3891.85 L m(-2) h(-1) at a low pressure of 0.1 MPa) and a superior indigo rejection ratio (98.73%). Compared with PAN/PP composite membrane, its rejection ratio increased 3.11 times, while the water flux only reduced 17.30%. It was owing that the excellent hydrophilicity of OMWCNTs network and ultrathin electrospun PAN midlayer endowed the composite membrane with a high flux. And the high rejection efficiency of OMWCNTs-PAN/PP composite membranes was achieved on the account of the combination of gradient structures (i. e., OMWCNTs network and ultrathin PAN nanofibrous membrane) and multilevel filtration mechanisms. Therefore, the OMWCNTs-PAN/PP composite membranes have opened up an innovative alternative for the fabrication of high flux and rejection composite membranes in wastewater treatment.
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