Surface coating of UF membranes to improve antifouling properties: A comparison study between cellulose nanocrystals (CNCs) and cellulose nanofibrils (CNFs)

被引：97
作者：
Bai, Langming [1 ]
Liu, Yatao [1 ]
Ding, An [1 ]
Ren, Nanqi [1 ]
Li, Guibai [1 ]
Liang, Heng [1 ]
机构：
[1] Harbin Inst Technol, State Key Lab Urban Water Resource & Environm, Sch Environm, Harbin 150090, Heilongjiang, Peoples R China
来源：
CHEMOSPHERE | 2019年 / 217卷
基金：
美国国家科学基金会; 中国博士后科学基金; 中国国家自然科学基金;
关键词：
Ultrafiltration; Cellulose nanocrystals (CNCs); Cellulose nanofibers (CNFs); Surface coating; Membrane fouling; ULTRAFILTRATION MEMBRANE; HUMIC-ACID; NANOCOMPOSITE MEMBRANES; FOULING MITIGATION; WATER; PERFORMANCE; GRAPHENE; LAYERS; PERMEABILITY; POLYSULFONE;
D O I：
10.1016/j.chemosphere.2018.10.219
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
The inherent properties of hydrophilicity and environmental preferability of cellulose nanocrystals (CNCs) and cellulose nanofibers (CNFs) make them great candidates for application in water-treatment membranes. In this study, the antifouling properties of CNCs and CNFs, modified ultrafiltration (UF) membranes, were directly compared. A facile modification method was conducted by coating CNCs and CNFs on the surface of polyethersulfone (PES) membranes to prepare CNC-coating membranes and the CNF-coating membranes. Membrane surface morphology was characterized by atomic force microscopy (AFM), and the results showed that the CNF-coating membranes exhibited greater surface roughness than the CNC-coating membranes. Pure water flux measurements demonstrated that the flux of the CNC-coating membranes was slightly lower than that of the CNF-coating membranes. Antifouling properties were evaluated and compared for the two types of membranes by filtration of NOM foulant models, humic acid (HA) and bovine serum albumin (BSA). The results showed that the antifouling properties of the modified membranes were enhanced through the coating of either CNCs or CNFs to a control PES membrane. The CNC-coating membranes outperformed the CNF-coating membranes in alleviating both reversible fouling and irreversible fouling caused by HA and BSA. In addition, the antifouling performance of the coating membranes was enhanced with increased coating content. (C) 2018 Elsevier Ltd. All rights reserved.
引用
收藏
页码：76 / 84
页数：9
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