Regulatory mechanism of blending additives on interface interaction and phase separation of the heterogeneous braid-reinforced hollow fiber membranes

被引:0
作者
Li, Jiahui [1 ,3 ]
Song, Ziping [1 ,3 ]
Guan, Wangwang [1 ]
Gao, Haifu [1 ,3 ]
Yan, Hongjin [1 ]
Du, Zhiyao [1 ]
Zhang, Jianhua [4 ]
Wu, Chunrui [1 ,2 ,3 ]
机构
[1] Tiangong Univ, Sch Mat Sci & Engn, State Key Lab Separat Membranes & Membrane Proc, Tianjin 300387, Peoples R China
[2] Tiangong Univ, Sch Chem Engn & Technol, Tianjin Key Lab Green Chem Proc Engn, Tianjin 300387, Peoples R China
[3] Tiangong Univ, Hebei Ind Technol Res Inst Membranes, Cangzhou Inst, Cangzhou 061000, Peoples R China
[4] Victoria Univ, Inst Sustainable Ind & Liveable Cities, Sydney, Australia
基金
中国国家自然科学基金;
关键词
Braid-reinforced hollow fiber membrane; Non-solvent induced phase separation; Mixed amphiphilic additive; Interface coordination; Interfacial binding strength; SURFACE-ENERGY; PERFORMANCE; DESIGN;
D O I
10.1016/j.memsci.2024.123536
中图分类号
TQ [化学工业];
学科分类号
0817 ;
摘要
The exfoliation of the polymer layer from the reinforcement material is the key challenge for applying braidreinforced hollow fiber membranes (BR HFMs). In this work, a mixed amphiphilic additive system was constructed and adopted in BR HFMs preparation by non-solvent induced phase separation (NIPS). The effect of the mixed system on the state of the casting solution and phase inversion process, the interaction between the casting solution and the braid material, together with the structure and filtration performance was studied. The role of the mixed system on the interface coordination and membrane structure formation mechanisms was elucidated. The results showed that both the composition of the mixed amphiphilic additives and the interaction time between the casting solution and braid material threw much light on the interface coordination and membrane formation. The interfacial compatibility of the casting solution and braid material was obviously improved, resulting in the enhancement of the binding force between the braid and PVDF membrane layer. The permeation flux and anti-exfoliation performance were simultaneously improved with the proper addition of the mixed amphiphilic additives. The stability of the BR HFMs was primarily testified by filtration of real sludge suspension solution with back-washing operation.
引用
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页数:10
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