膜
纳米复合材料
结垢
纤维素
相位反转
接触角
Zeta电位
化学工程
多孔性
材料科学
生物污染
化学
纳米颗粒
复合材料
生物化学
工程类
作者
Langming Bai,Hongyu Wu,Junwen Ding,An Ding,Xinyu Zhang,Nanqi Ren,Guibai Li
标识
DOI:10.1016/j.cej.2019.122919
摘要
To prevent membrane fouling caused by natural organic matter (NOM), cellulose nanocrystals (CNCs) were blended with inherently hydrophobic polyethersulfones (PES) by the phase inversion method to fabricate nanocomposite membranes. Characterization of the membrane surface morphology indicated that the CNC-containing nanocomposite membranes exhibited homogeneous surfaces. Compared to the neat PES membrane, the nanocomposite membranes had higher porosity and zeta potentials. The static contact angle and pure water flux of the nanocomposite membranes indicated an increase in hydrophilicity of the modified membranes. However, the porosity and permeability of the nanocomposite membranes decreased at 5.0 wt% CNC loading. The NOM removal and fouling experiments were performed using humic acids (HAs), bovine serum albumin (BSA) and sodium alginate (NaAlg) as surface water pollutants. The removal rates of hydrophobic HA and BSA were significantly increased by the developed membranes. The nanocomposite membranes exhibited enhanced anti-NOM fouling properties, increased cleaning efficiency and effective control of both reversible and irreversible fouling. This study provides insight into the utilization of high-performance nanocomposites for a wide range of water treatment applications.
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