HUWen-bo,CHENWei,DINGMing-mei,et al.Preparation of Graphene Oxide-doped Aromatic Polyamide Composite Nanofiltration Membrane and Its Separation Performance[J].China Water & Wastewater,2023,39(9):57-64.
Click Copy

Preparation of Graphene Oxide-doped Aromatic Polyamide Composite Nanofiltration Membrane and Its Separation Performance

China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU] volume: 第39卷 Number: 第9期 Page: 57-64 Column: Date of publication: 2023-05-01
Author(s):
HU　Wen-bo1; 2;  CHEN　Wei1; 2;  DING　Ming-mei1; 2;  CHEN　Jie3;  WANG　An-qi1; 2;  LAN　Xiao-meng1; 2
（1. Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes ， Hohai University， Nanjing 210098， China； 2. College of Environment， Hohai University， Nanjing 210098， China； 3. Jiangsu Nollet Intelligent Water Equipment Co. Ltd.， Nantong 226000， China）
Keywords:
composite nanofiltration membrane;  modified aromatic polyamide;  graphene oxide (GO);  phase conversion method;  interfacial polymerization
Abstract:
To improve the separation characteristics of nanofiltration membrane and expand its applicability in water treatment, the modified graphene oxide-doped aromatic polyamide composite nanofiltration membrane (m-PPTA/PSf-GO) was prepared by interfacial polymerization method after the basement membrane was prepared by phase conversion method. In the preparation process, polysulfone (PSf) was used as the membrane substrate, and graphene oxide (GO) and polyterephthaloyl p-phenylenediamine modified by 4,4’-diaminodiphenyl ether (4,4’-ODA) were used as the blending materials. Then, the effects of the proportion of modified materials on the surface morphology, internal structure and separation performance of the membrane were investigated. When the proportion of the modified polyterephthaloyl p-phenylenediamine (m-PPTA) was 6% and distributed uniformly, the surface of the membrane protruded obviously, which was conducive to the supporting layer to bond closely with the polyamide layer. The introduction of GO enhanced the membrane hydrophilicity and increased the internal spongy void, which was conducive to the transfer of water molecules. When the proportion of GO was 0.005%, m-PPTA/PSf-GO had the best water flux and retention rates in filtration of MgSO4 and Na2SO4 water samples. The water flux was 68.7 L/(m2·h·MPa) and 71.0 L/(m2·h·MPa), and the retention rates were 91.3% and 94.8%, respectively. The blending modification method was simple, and the introduction of m-PPTA and GO effectively improved the separation performance of the composite nanofiltration membrane.
Last Update: 2023-05-01