Abstract
Composite membranes made of β-chitosan extracted from squid were prepared and crosslinked with sulfuric acid with various crosslinking times. Dehydration performance of the water/ethanol and water/isopropanol mixtures by pervaporation experiments using β-chitosan composite membranes was investigated. Crosslinking and deacetylation degree of the membrane were confirmed by ATR-FT-IR and elemental analysis (EA), respectively. Pervaporation experiments were investigated under various feed concentrations and temperatures. β-Chitosan showed a higher degree of swelling in water than a-chitosan, resulting in a higher flux of β-Chitosan than that of α-chitosan. β-Chitosan composite membranes showed good dehydration performance in pervaporation of a water/alcohol mixture. For water/ethanol mixtures, separation factor (α) - 270; flux (J) - 700 g/m2hr, for water/isopropanol, α - 150; J -1800 g/m2hr, respectively.
The Effects of the Characteristics of Support Layers on Separation of Water-Alcohol Mixtures through Chitosan Pervaporation Composite Membranes.