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- W2031497240 abstract "NaOH/urea aqueous solution has been used as a solvent for chitin for the first time. Effects of this solvent composition and temperature on the solubility and stability of chitin solution were studied with an optical microscope, from which 8 wt% NaOH/4 wt% urea concentrations were deduced as suitable and −20 °C as the appropriate temperature. The original and regenerated chitin were characterized by viscosity, elemental analysis, FI-IR and X-RD analysis, and the effect of solvent composition and temperature on chitin structure was investigated. It was inferred that 8 wt% NaOH/4 wt% urea solvent under low temperature adventitiously has little effect on chitin structure and the urea is of benefit to the stability of chitin solution. In addition, the rheological properties suggested that chitin aqueous solution in high concentration is a pseudoplastic fluid and that chitin aqueous solution in low concentrations is a Newtonian fluid. This chitin aqueous solution is sensitive to temperature and will transform it to a gel when temperature increases." @default.
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- W2031497240 date "2007-11-01" @default.
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- W2031497240 title "Solubility and property of chitin in NaOH/urea aqueous solution" @default.
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- W2031497240 doi "https://doi.org/10.1016/j.carbpol.2007.05.002" @default.
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