In this study, inspired by ‘‘micro-explosion” strategies, a separation membrane with high porosity andpermeability, and highly efficient separation performance was prepared. With the use of polyvinylidenefluoride (Solvay6015) as membrane materia...
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https://www.riss.kr/link?id=A108963721
Xinyang Li (Tiangong University) ; Ligang Lin (Tiangong University) ; Zitian Li (Tiangong University) ; Jing Yang (Tiangong University) ; Wensong Ma (Tiangong University) ; Xu Yang (Tiangong University) ; Xiaopeng Li (Academy of Military Sciences) ; Chunhong Wang (Tiangong University) ; Qingping Xin (Tiangong University) ; Kongyin Zhao (Tiangong University)
2023
English
KCI등재,SCOPUS,SCIE
학술저널
516-531(16쪽)
0
상세조회0
다운로드다국어 초록 (Multilingual Abstract)
In this study, inspired by ‘‘micro-explosion” strategies, a separation membrane with high porosity andpermeability, and highly efficient separation performance was prepared. With the use of polyvinylidenefluoride (Solvay6015) as membrane materia...
In this study, inspired by ‘‘micro-explosion” strategies, a separation membrane with high porosity andpermeability, and highly efficient separation performance was prepared. With the use of polyvinylidenefluoride (Solvay6015) as membrane material, azodicarbonamide (AC) as an ‘‘explosion center point” tothe casting membrane solution, and NaOH as an ‘‘external stimulus” in the coagulation bath, the twochemicals undergo in-situ foaming reaction to form a loose nanofiltration membrane. FTIR, XPS, andTGA results demonstrated that the decomposition of AC was complete, which produced gases thatincreased the porosity of the membrane. The optimized membrane has a higher flux(101.72 L m2 h1 at 0.3 Mpa), higher negative surface charge, and better mechanical properties underthe premise of separating CR/NaCl. In the separation of pollutants with different molecular weights,the permeation flux of the optimized membrane increased by more than double. This foaming technologywas also applied to another membrane material, ethylene vinyl alcohol, from which we found that themembrane also had higher porosity and better permeability. Together, this paper presents an in-situfoaming method for preparing separation membranes and lays the foundation for solving the trade-offbetween membrane permeability and rejection in dye/salt separation.
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