Kim Yeji, Yang Eunmok, Park Hosik, Choi Heechul
School of Earth Science and Environmental Engineering, Gwangju Institute of Science and Technology (GIST) 123 Cheomdangwagi-ro, Buk-gu Gwangju 61005 South Korea
Center for Membranes, Advanced Materials Division, Korea Research Institute of Chemical Technology (KRICT) Daejeon 34114 South Korea
RSC Adv. 2020 Feb 4;10(10):5697-5703. doi: 10.1039/c9ra08870a.
In this study, the anti-biofouling effect of a thin film nanocomposite (TFN) membrane with a functionalized-carbon-nanotube-blended polymeric support layer was analyzed to determine the applicability of this membrane for the pressure-retarded osmosis (PRO) process. The anti-biofouling property of TFN membranes for the PRO process was characterized by SEM, FTIR, and AFM, as well as contact angle measurements and zeta potential analysis of the bottom side of the support layer. The anti-biofouling effect of the fabricated membrane for the PRO process was analyzed by bacterial attachment tests on the bottom surface of the support layer and biofouling tests in a cross-flow operation system in the PRO mode (AL-DS). The TFN membrane with 0.5 wt% fCNTs exhibited enhanced anti-biofouling properties of the bottom surface of the support layer compared to the bare TFC membrane due to the low roughness, high negative surface charge, and hydrophilicity. Compared to the bare TFC membrane, the support layer of the fCNT0.5-TFN membrane exhibited a 35% decrease in bacterial attachment. In a laboratory-scale biofouling test, the water flux of the fCNT0.5-TFN membrane was ∼10% less than that of the bare TFC membrane in the PRO mode.
在本研究中，分析了具有功能化碳纳米管共混聚合物支撑层的薄膜纳米复合（TFN）膜的抗生物污堵效果，以确定该膜在压力延迟渗透（PRO）过程中的适用性。通过扫描电子显微镜（SEM）、傅里叶变换红外光谱（FTIR）和原子力显微镜（AFM），以及支撑层底面的接触角测量和zeta电位分析，对用于PRO过程的TFN膜的抗生物污堵性能进行了表征。通过在支撑层底面进行细菌附着试验以及在PRO模式（AL-DS）的错流操作系统中进行生物污堵试验，分析了所制备的膜对PRO过程的抗生物污堵效果。与裸TFC膜相比，含有0.5 wt%功能化碳纳米管（fCNTs）的TFN膜由于粗糙度低、表面负电荷高和亲水性，支撑层底面的抗生物污堵性能增强。与裸TFC膜相比，fCNT0.5-TFN膜的支撑层细菌附着减少了35%。在实验室规模的生物污堵试验中，fCNT0.5-TFN膜在PRO模式下的水通量比裸TFC膜低约10%。
