Characteristics of Different Molecular Weight Chitosan Films Affected by the Type of Organic Solvents

Authors

  • S.Y. Park,

    1. Authors Park and Rhim are with the Dept. of Food Engineering and Food Industrial Technology Research Center, Mokpo National Univ., Republic of Korea. Author Marsh is with Kenneth S. Marsh & Assoc., Ltd., and The Woodstock Institute for Science in Service to Humanity (WISSH), Central, S.C., U.S.A. Direct inquiries to author Marsh (E-mail: drksmarsh@aol.com).
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  • K.S. Marsh,

    1. Authors Park and Rhim are with the Dept. of Food Engineering and Food Industrial Technology Research Center, Mokpo National Univ., Republic of Korea. Author Marsh is with Kenneth S. Marsh & Assoc., Ltd., and The Woodstock Institute for Science in Service to Humanity (WISSH), Central, S.C., U.S.A. Direct inquiries to author Marsh (E-mail: drksmarsh@aol.com).
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  • J.W. Rhim

    1. Authors Park and Rhim are with the Dept. of Food Engineering and Food Industrial Technology Research Center, Mokpo National Univ., Republic of Korea. Author Marsh is with Kenneth S. Marsh & Assoc., Ltd., and The Woodstock Institute for Science in Service to Humanity (WISSH), Central, S.C., U.S.A. Direct inquiries to author Marsh (E-mail: drksmarsh@aol.com).
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  • The authors acknowledge support from Cryovac, the Woodstock Institute for Science in Service to Humanity (WISSH), and the Food Industrial Technology Research Center (Republic of Korea).

Abstract

ABSTRACT: Chitosan films were prepared using 3 chitosan molecular weights and 4 organic acid solvents without plasticizer. Tensile strength (TS) and elongation (E) ranged from 6.7 to 150.2 MPa, and from 4.1 to 117.8%, respectively. Water vapor permeability (WVP) and oxygen permeability (OP) ranged from 0.3 to 0.7 ng-m/m2-s-Pa and OP from 0.4 to 5.8 × 10 −8 cc/m2-day-atm, respectively. TS increased with chitosan molecular weight. Acetic acid resulted in the toughest films followed by malic, lactic, and citric acid, respectively. Films prepared with citric acid had the highest E values. WVP was not influenced significantly by the molecular weight of chitosan. OP of films prepared with malic acid was the lowest, followed by acetic, lactic, and citric acid.

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