TY - JOUR
T1 - Effects of structural crystallinity and defects in microporous Al-MOF filled chitosan mixed matrix membranes for pervaporation of water/ethanol mixtures
AU - Vinu, Madhan
AU - Senthil Raja, Duraisamy
AU - Jiang, Yue Chun
AU - Liu, Ting Yu
AU - Xie, Ya Yun
AU - Lin, Yi Feng
AU - Yang, Chun Chuen
AU - Lin, Chia Her
AU - Alshehri, Saad M.
AU - Ahamad, Tansir
AU - Salunkhe, Rahul R.
AU - Yamauchi, Yusuke
AU - Deng, Yu Heng
AU - Wu, Kevin C.W.
N1 - Funding Information:
Financial assistance received from the Ministry of Science and Technology, Taiwan (MOST 103-2632-M-033-001-MY3, MOST 104-2113-M-033-006, MOST 99-2113-M-033-005-MY2, MOST 100-2632-M-033-001-MY3, and MOST 104-2628-E-033-001-MY3); the Industrial Technology Research Institute, Taiwan; and Chung Yuan Christian University, Taiwan are gratefully acknowledged. The authors extend their appreciation to the International Scientific Partnership Program (ISPP) at King Saud University (KSU) for funding this research work through ISPP-0097.
Publisher Copyright:
© 2017 Taiwan Institute of Chemical Engineers
PY - 2018/2
Y1 - 2018/2
N2 - A new two-dimensional microporous metal organic framework (MOF), Al-MOF, [Al(OH)(MBA)] (CYCU-7, MBA = diphenylmethane-4,4′-dicarboxylate anion) and its reported analogue, [Al(OH)(SBA)] (CAU-11, SBA = 4,4′-sulfonyldibenzoate anion), have been synthesized using hydrothermal and solvothermal methods, respectively, and their structural crystallinities and defect porosities were carefully controlled and characterized by N2 sorption isotherms and 27Al solid-state nuclear magnetic resonance measurements. Interestingly, the MOF synthesized by the ethanol-based solvothermal method (CYCU-7) show a significant degree of linker-missing defects compared to that synthesized by the water-based hydrothermal method (CAU-11). We further incorporated the synthesized CYCU-7 and CAU-11 with chitosan (CS) biopolymer to make CYCU-7@CS and CAU-11@CS mixed matrix membranes (MMMs) with the loading amount of MOF 2.5, 5.0, or 10 wt%. The as-prepared CYCU-7@CS and CAU-11@CS MMMs were applied for separation of water/ethanol mixtures through the pervaporation process, and the effects of the structural properties (e.g. crystallinity and defects) of CYCU-7 and CAU-11 on the separation performance are studied. It is found that defect-rich CYCU-7@CS MMMs exhibit higher flux, while CAU-11@CS MMMs with higher crystallinity exhibit a higher separation factor. In addition, the CAU-11@CS MMM with 5.0 wt% loading of CAU-11 displays the best separation performance (separation factor = 2741 and flux = 458 g/m2 h).
AB - A new two-dimensional microporous metal organic framework (MOF), Al-MOF, [Al(OH)(MBA)] (CYCU-7, MBA = diphenylmethane-4,4′-dicarboxylate anion) and its reported analogue, [Al(OH)(SBA)] (CAU-11, SBA = 4,4′-sulfonyldibenzoate anion), have been synthesized using hydrothermal and solvothermal methods, respectively, and their structural crystallinities and defect porosities were carefully controlled and characterized by N2 sorption isotherms and 27Al solid-state nuclear magnetic resonance measurements. Interestingly, the MOF synthesized by the ethanol-based solvothermal method (CYCU-7) show a significant degree of linker-missing defects compared to that synthesized by the water-based hydrothermal method (CAU-11). We further incorporated the synthesized CYCU-7 and CAU-11 with chitosan (CS) biopolymer to make CYCU-7@CS and CAU-11@CS mixed matrix membranes (MMMs) with the loading amount of MOF 2.5, 5.0, or 10 wt%. The as-prepared CYCU-7@CS and CAU-11@CS MMMs were applied for separation of water/ethanol mixtures through the pervaporation process, and the effects of the structural properties (e.g. crystallinity and defects) of CYCU-7 and CAU-11 on the separation performance are studied. It is found that defect-rich CYCU-7@CS MMMs exhibit higher flux, while CAU-11@CS MMMs with higher crystallinity exhibit a higher separation factor. In addition, the CAU-11@CS MMM with 5.0 wt% loading of CAU-11 displays the best separation performance (separation factor = 2741 and flux = 458 g/m2 h).
KW - Chitosan
KW - Metal-organic frameworks
KW - Mixed matrix membrane
KW - Pervaporation process
KW - Separation
UR - http://www.scopus.com/inward/record.url?scp=85041220115&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85041220115&partnerID=8YFLogxK
U2 - 10.1016/j.jtice.2017.11.007
DO - 10.1016/j.jtice.2017.11.007
M3 - Article
AN - SCOPUS:85041220115
SN - 1876-1070
VL - 83
SP - 143
EP - 151
JO - Journal of the Taiwan Institute of Chemical Engineers
JF - Journal of the Taiwan Institute of Chemical Engineers
ER -