Pervaporation separation of isopropanol/water mixtures through crosslinked chitosan membranes

Devi, D. Anjali; Smitha, B.; Sridhar, S.; Aminabhavi, Tejraj M.

doi:10.1016/j.memsci.2005.03.051

Cited by 195 publications

(35 citation statements)

References 31 publications

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“…A hydrophilic chitosan membrane develops a hydrogen bond interaction with water, leading to preferential sorption and diffusion of water through the membrane, as suggested by Anjali et al [10]. Results from the present study support this interpretation, because the membrane used here quickly absorbed water in the first 5 min and remained at a fairly stable rate afterwards.…”

Section: Water Fluxsupporting

confidence: 88%

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Characteristics of chitosan membranes modified by argon plasmas

Wanichapichart

Sungkum

Taweepreda

et al. 2009

Surface and Coatings Technology

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Section: Water Fluxsupporting

confidence: 88%

“…The percentage of water swelling of membranes was calculated from kwater = 1 − Wd Ww × 100 [10]. The results in Table 2 show greater water swelling in membrane G0.005 than in the CH1 control membrane, coinciding with the higher absorption spectra at 1092 cm − 1 (C-O stretch) found above.…”

Section: Water Swelling Propertymentioning

confidence: 62%

Characteristics of chitosan membranes modified by argon plasmas

Wanichapichart

Sungkum

Taweepreda

et al. 2009

Surface and Coatings Technology

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“…A minimum of three independent measurements of flux and α PV were taken under similar conditions of temperature and feed compositions to confirm the steady‐state PV. The PV setup is the same as described earlier 11, 18…”

Section: Methodsmentioning

confidence: 99%

Activated charcoal‐loaded composite membranes of sodium alginate in pervaporation separation of water‐organic azeotropes

Aminabhavi

Patil

Bhat

et al. 2009

J of Applied Polymer Sci

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Composite membranes of sodium alginate prepared by incorporating nanosized-activated charcoal particles were prepared and characterized for the extent of cross-linking, thermal stability, and mechanical strength properties using Fourier transform infrared, differential scanning calorimetry, and universal testing machine, respectively. The membranes were tested for pervaporation (PV) dehydration of isopropanol (IPA), ethanol (EtOH), 1,4-dioxane (1,4-D), and tetrahydrofuran (THF) at their azeotropic compositions. Improved PV performances of the composite membranes were observed compared with plain sodium alginate membrane for all the azeotropes. Sorption was studied to evaluate the extent of interactions between liquids and membranes as well as

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“…CS is the second most abundant natural biopolymer obtained by alkaline deacetylation of chitin, a major component in exo‐skeleton of crustaceans 10. Because of its low cost of production, natural abundance and ecocompatibility, CS is a preferred membrane material for ultrafiltration, reverse osmosis, and pervaportion 11–13. It is also reflected that CS‐based natural polymeric composite membranes can help reducing methanol crossover in DMFCs 14–16.…”

Section: Introductionmentioning

confidence: 99%

Chitosan‐polyvinyl alcohol‐sulfonated polyethersulfone mixed‐matrix membranes as methanol‐barrier electrolytes for DMFCs

Meenakshi

Bhat

Sahu

et al. 2011

J of Applied Polymer Sci

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Chitosan (CS)-polyvinyl alcohol (PVA) cross-linked with sulfosuccinic acid (SSA) and modified with sulfonated polyethersulfone (SPES) mixed-matrix membranes are reported for their application in direct methanol fuel cells (DMFCs). Polyethersulfone (PES) is sulfonated by chlorosulfonic acid and factors affecting the sulfonation reaction, such as time and temperature, are studied. The ion-exchange capacity, degree of sulfonation, sorption, and proton conductivity for the mixed-matrix membranes are investigated. The mixed-matrix membranes are also characterised for their mechanical and thermal properties. The methanol-crossover flux across the mixed-matrix membranes is studied by measuring the mass balance of methanol using the density meter. The methanol cross-over for these membranes is found to be about 33% lower in relation to Nafion-117 membrane. The DMFC employing CS-PVA-SPES mixed-matrix membrane with an optimum content of 25 wt % SPES delivers a peak power-density of 5.5 mW cm À2 at a load currentdensity of 25 mA cm À2 while operating at 70

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Pervaporation separation of isopropanol/water mixtures through crosslinked chitosan membranes

Cited by 195 publications

References 31 publications

Characteristics of chitosan membranes modified by argon plasmas

Characteristics of chitosan membranes modified by argon plasmas

Activated charcoal‐loaded composite membranes of sodium alginate in pervaporation separation of water‐organic azeotropes

Chitosan‐polyvinyl alcohol‐sulfonated polyethersulfone mixed‐matrix membranes as methanol‐barrier electrolytes for DMFCs

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