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KMID : 0382419980240030048
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Korean Journal of Environmental Health Society
1998 Volume.24 No. 3 p.48 ~ p.53
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Pot Test and Preparation of PVA / Chitosan Blending Film According to Molecular Weight of Chitosan
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Lee Gi-Chang
Kim Pan-Gyi
Jung Duck-Chae
Hwang Sung-Kwy
Kim Jong-Woan
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Abstract
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Chitin is known as biodegradable natural polymer. But, in spite of various application of chitin from waste marine sources, commercial use of chitin has been limited due to highly resistance to chemicals and the absense of proper solvents. We made various viscosity of chitosan from chitin by change of Mima´s method through the deacetylation which is various condition of NaOH concentration, reaction time and temperature. Also, Polyvinyl alcohol/chitosan blend films were prepared by different solution blends containing the ratio of 5, 10, 15 and 20% chitosan and low, medium, high molecular weight of chitosan to find a more useful biodegradable polymer. Thermal and mechanical properties of PVA/chitosan blend films such as DSC, impact strength, tensile strength and morphological changes by SEM were determined. The 10∼15% PVA/chitosan(low, medium) blend films were similar to PVA. Also, PVA/chitosan blend films at the laboratory soil test(Pot Test) were completely degraded in month with four kinds of soils by microorganisms.
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