LISong-zhe,CHENGui-jing,LIZi-yu,et al.Preparation of Polyvinylidene Fluoride （PVDF） Hollow Fiber Membrane Modified by Multi-walled Carbon Nanotubes and Its Membrane Fouling Behavior[J].China Water & Wastewater,2025,41(23):8-14.
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Preparation of Polyvinylidene Fluoride （PVDF） Hollow Fiber Membrane Modified by Multi-walled Carbon Nanotubes and Its Membrane Fouling Behavior

China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU] volume: 第41卷 Number: 第23期 Page: 8-14 Column: Date of publication: 2025-12-01
Author(s):
LI　Song-zhe1;  CHEN　Gui-jing2;  LI　Zi-yu1;  WANG　Zi-cheng1;  ZHANG　Rui-gang1;  YANG　Zheng1;  LIU　Bai-cang1; 2
（1. College of Architecture and Environment， Sichuan University， Chengdu 610065， China； 2. Institute for Disaster Management and Reconstruction， Sichuan University， Chengdu 610207， China）
Keywords:
PVDF membrane;  MWCNTs;  physicochemical properties;  surface tension;  membrane fouling
Abstract:
Polyvinylidene fluoride (PVDF) hollow fiber membranes modified with three types of multi-walled carbon nanotubes (MWCNTs) were prepared by non-solvent induced phase separation method. The effects of pristine MWCNTs, carbonylated MWCNTs (MWCNTs-COOH), and hydroxylated MWCNTs (MWCNTs-OH) on the structure and properties of the PVDF membranes were investigated. The results indicated that MWCNTs-COOH and MWCNTs-OH enhanced the surface hydrophilicity and total surface tension. The MWCNTs-COOH modified membrane exhibited a pure water flux 1.6 times that of the pristine membrane. The rejection of HA and BSA increased from 97.5% and 75.4% to 98.0% and 95.5%, respectively. The flux recovery rate for HA improved from 82.7% to 98.5%, whereas that for BSA decreased from 91.5% to 69.0%. The anti-fouling mechanisms were further elucidated using the XDLVO theory.
Last Update: 2025-12-01