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Received November 18, 2014
Accepted December 28, 2014
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Fabrication of composite nanofiltration membranes with enhanced structural stability for concentrating oligomeric proanthocyanidins in ethanol aqueous solution
1Key Laboratory for Green Technology of Ministry of Education, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China 2Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin 300072, China
Korean Journal of Chemical Engineering, September 2015, 32(9), 1902-1909(8), 10.1007/s11814-014-0393-8
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Abstract
Composite nanofiltration (NF) membranes with enhanced structural stability were fabricated and used to concentrate oligomeric proanthocyanidins (OPC) in ethanol solution. The composite NF membranes were prepared by interfacial polymerization of piperazine (PIP) with trimesoyl chloride (TMC), upon the porous supports of polyethersulfone (PES) and polyvinyl formal (PVF) blend membranes. The active layers of composite NF membranes were covalently linked to porous supports owing to hydroxyl groups of PVF upon support surface, which could participate in the interfacial polymerization reaction. The pure water fluxes of the composite NF membranes reached 34.9 L/m2h, while the rejections of Na2SO4 and orange GII were 92.7% and 98.4%, respectively. The enhanced structural stability of the composite NF membranes were confirmed by long-term immersion experiment in ethanol. NF concentration process was considered as a potential alternative to conventional evaporation concentration process for OPC concentration in_x000D_
ethanol solution.
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References
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Tang BB, Huo ZB, Wu PY, J. Membr. Sci., 320(1-2), 198 (2008)
An QF, Sun WD, Zhao Q, Ji YL, Gao CJ, J. Membr. Sci., 431, 171 (2013)
Zinadini S, Zinatizadeh AA, Rahimi M, Vatanpour V, Zangeneh H, Beygzadeh M, Desalination, 349, 145 (2014)
Li XS, Wang R, Wicaksana F, Tang CY, Torres J, Fane AG, J. Membr. Sci., 450, 181 (2014)
Li XL, Zhu LP, Zhu BK, Xu YY, Sep. Purif. Technol., 83, 66 (2011)
Li LC, Wang BG, Tan HM, Chen TL, Xu JP, J. Membr. Sci., 269(1-2), 84 (2006)
