Pervaporation membrane chitosan membranes

Feng, X.S. Huang, R.Y.M. Pervaporation with chitosan membranes I. Separation of water from ethylene glycol by a chitosan/polysulfone composite membrane. J. Membr. Sci. 1996, 116, 67-76. 

The ease with which chitosan hydrocolloid gels can be casted and functionalised has prompted their use as matrices for zeolites in pervaporation membranes and as binders of adsorbents and catalysts [3,4]. 

Ghen, X., Yang, H., Gu, Z., and Shao, Z. (2001) Preparation and characterization of HY zeolite-filled chitosan membranes for pervaporation separation. /. Appl. 

Huang RYM, Moon GY, and Pal R. N-acetylated chitosan membranes for the pervaporation separation of alcohol/toluene mixtures. J. Memb. Sci. 2000 176(2) 223-231. 

Figure 6.38 Typical characteristics of a chitosan membrane in the dehydration of alcohol-water mixtures by pervaporation. (A) Separation factor (a) (O) permeability coefficients of water (X) permeability coefficients of alcohols. Pervaporation of 28 mol% alcohol-water mixed solution was carried out at 60 °C.

Dubey et al. [74] improved the BC membrane by the impregnation of chitosan [Mw 100-300 kDa]. The composite membrane was dried under vacuum. The potential of the composite membrane for the pervaporative separation of the ethanol/water azeotrope was comparable to that of a polyvinyl alcohol [PVA] membrane [74]. The normalized flux, selectivity, and PSI of the composite membrane were 42.8 kg pm m h , 9.2 and 350 kg pm m h , respectively. Compared with the PVA membrane, BC membrane impregnated with chitosan had excellent dimensional stability, better mechanical strength, and improved thermal stability. 

Zhang, W., Li, W., Eang, Y, and Wang, X. 2007. Maleic anhydride surface-modification of crosslinked chitosan membrane and its pervaporation performance. J. Membr. Sci. 295 130-138. 

Anjali Devi, D., Smitha, B., Sridhar, S., and Aminbhavi, T. M. 2005. Pervaporation separation of isopropanol/water mixtures through cross-linked chitosan membranes. J. Membr. Sci. 262 91-99. 

Sajjan, A. M., Jeevan Kumar, B. K., Kittur, A. A., and Kariduraganavar, M. Y. 2013. Novel approach for the development of pervaporation membranes using sodium alginate and chitosan-wrapped multiwalled carbon nanotubes for the dehydration of isopropanol. J. Membr. Sci. 425-426 77-88. 

The dense polyvinyl alcohol layer is supported by a porous PAN substrate membrane. Polyelectrolyte material [24] and chitosan [25], a natural product, are also potentially useful for dehydration by pervaporation. Sihcone rubber membranes developed for the removal of organic vapors from air can also be used for the removal of volatile organic compounds (VOCs) from water by pervaporation [23]. Because of the high hydrophobic nature of silicone rubber, VOCs are preferentially sorbed and transported through the membrane. 

Choudhari, S.K., Kittur, A.A., Kulkarni, S.S. and Kariduraganavar, M.Y. 2007. Development of novel blocked diisocyanate crosslinked chitosan membranes for pervaporation separation of water-isopropanol mixtures. 302 197-206. 

Huang, R.Y.M., Moon, G.Y. and Pal, R. 2000. N-Acetylated chitosan membranes for the pervaporation separation of alcohols/toluene mixtures, 176 223-231. 

Thesis, Chemical Engineering Department, University of Cincinnati, Cincinnati, OH. Masaru, M., Reikichi, I., Seiich, M., Shuzo, Y. and Akira, M. 1985. Chitosan membranes for separation of water-ethanol by pervaporation. 42(2) 139-142. 

Nawawi, M.G.B.M. and Hassan, H.B. 2003. Pervaporation separation of isopropanol-water mixtures using crosslinked chitosan membranes. J. Teknol. 39(A) (Keluaran Khas Dis) 55-64. 

Peng, F., Pan, F., Sun, H., Lu, L. and Jiang, Z. 2007. Novel nanocomposite pervaporation membranes composed of poly(vinyl alcohol) and chitosan-wrapped carbon nanotube. J. Memb. Sci. 300 13-19. 

Xiao, S., Feng, X. and Huang, R.Y.M. 2007. Trimesoyl chloride crosslinked chitosan membranes for CO2/N2 separation and pervaporation dehydration of isopropanol,... 

Chitosan membranes have been successfully used in pervaporation processs, e.g. chitosan/poly(vinyl alcohol) (75 25 wt. per cent) blends showed excellent performance with good mechanical strength during the pervaporation dehydration of isopropanol [207],... 

Permeation and Separation Characteristics for Aqueous Alcohol Solutions through the Chitosan Membrane during Pervaporation... 

The permeation and separation characteristics for various aqueous ethauol solutions through the chitosan membrane by evapomeation and pervaporation are compared in Table 34.2 (Uragami et al. 1988b). 

Liu, Y.-L., Su, Y.-H., Lee, K.-R., and Lai, J.-Y. 2005. Crosslinked organic-inorganic hybrid chitosan membranes for pervaporation dehydration of iospropanol-water mixtures with a long-term stability. J. Membr. Sci. 233-238. 

Uragami, T., Saito, M., and Takigawa, K. 1988b. Comparison of permeation and separation characteristics for aqueous alcoholic solutions by pervaporation and new evapomeation methods through chitosan membranes. Makromol. Chem. Rapid Commun., 9 361-365. 

Qlu S, Wu L, Shi G, Zhang L, Chen H, Gao C (2010) Preparation and pervaporation property of chitosan membrane with functionalized multiwalled carbon nanotubes. Ind Eng Chem Res... 

In a distinct vein, BC/chitosan membranes have been tested for pervaporative separation of binary aqueous-organic mixtures (ethanol/water) [111]. The substantially high pervaporative separation index (350 kg. x.m. h 0 and low activation energy (10 kj.mol ) are indicative of the high potential of BC/chitosan membranes in the pervaporative separation of ethanol/water azeotrope. Targeting to mimic the intrinsic antimicrobial properties of chitosan on BC nanofibrils, nanostructured BC nanocomposite membranes were obtained by surface functionalization with aminoalkyl groups (Figure 2.14) [114]. These bioactive nanostructured membranes also presented improved mechanical and thermal properties and may be useful for biomedical applications. 

Yang, D., Li, J., Jiang, Z. Y, Lu, L., and Chen, X. (2009). Chitosan/TiOj Nanocomposite Pervaporation Membranes for Ethanol Dehydration. Chemical Engineering Science. 64 3130-3137. 

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