Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education, China), School of Environmental Science and Technology, Dalian University of Technology , Dalian 116024, China.
Environ Sci Technol. 2014 Jul 15;48(14):8062-8. doi: 10.1021/es500506w. Epub 2014 Jun 26.
Manipulating carbon nanotubes (CNTs) through engineering into advanced membranes with superior performance for disinfection and decontamination of water shows great promise but is challenging. In this paper, a facile assembly of CNTs into novel hollow fiber membranes with tunable inner/outer diameters and structures is developed for the first time. These free-standing membranes composed entirely of CNTs feature a porosity of 86±5% and a permeation flux of about 460±50 L m(-2) h(-1) at a pressure differential of 0.04 MPa across the membrane. The randomly oriented interwoven structure of CNTs endows the membranes considerable resistance to pore blockage. Moreover, the adsorption capability of the CNT hollow fiber membranes, which is crucial in the efficient removal of small and trace contaminant molecules, is about 2 orders of magnitude higher than that of commercial polyvinylidene fluoride hollow fiber membranes. The unique advantage of the CNT hollow fiber membranes over other commercial membranes is that they can be in situ electrochemically regenerated after adsorption saturation.
通过工程手段将碳纳米管（CNTs）进行操纵，将其组装成具有优越消毒和去污性能的先进膜，这显示出巨大的潜力，但也具有挑战性。在本文中，首次开发了一种简便的方法，将 CNTs 组装成具有可调内径和结构的新型中空纤维膜。这些完全由 CNT 组成的独立式膜具有 86±5%的孔隙率和约 460±50 L m(-2) h(-1) 的渗透通量，在膜两侧的压差为 0.04 MPa 时。CNTs 的随机交织结构赋予了膜相当大的抗堵塞能力。此外，CNT 中空纤维膜的吸附能力对于有效去除小而痕量的污染物分子至关重要，其吸附能力约比商业聚偏二氟乙烯中空纤维膜高 2 个数量级。与其他商业膜相比，CNT 中空纤维膜的独特优势在于，它们在吸附饱和后可以进行原位电化学再生。
