Effect of shear rate on structural, mechanical, and barrier properties of chitosan/montmorillonite nanocomposite film

Authors

  • Seung In Hong,

    1. College of Life Sciences and Biotechnology, Korea University, 5ga Anam-Dong, Sungbuk-Ku, Seoul 136-701, Republic of Korea
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  • Jin Hwan Lee,

    1. CJ Cheil Jedang Food F&D Package Development Center, CJ CjeilJedang Corporation, Hankyung Bldg. 441, Jungnim-dong, Jung-gu, Seoul 100-791, Republic of Korea
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  • Ho Jae Bae,

    1. Department of Packaging Science, Clemson University, Clemson, South Carolina 29634-0320
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  • Song Yi Koo,

    1. KIST Gangneung Institute, Gangneung Techno valley, 290 Daejeon-dong, Gangneung, Gangwon-do 210-340, Republic of Korea
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  • Hyun Soo Lee,

    1. Research Development Department, LOTTE ALUMINIUM Co., LTD., 1005 Doksan-dong, Geumcheon-gu, Seoul 153-010, Republic of Korea
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  • Jae Hoon Choi,

    1. Research Development Department, LOTTE ALUMINIUM Co., LTD., 1005 Doksan-dong, Geumcheon-gu, Seoul 153-010, Republic of Korea
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  • Dong Hyun Kim,

    1. Korea Institue of Industrial Technology, Sangrok-gu, Ansan-si, Gyeonggi-do 426-791, Republic of Korea
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  • Seok-Hoon Park,

    Corresponding author
    1. College of Life Sciences and Biotechnology, Korea University, 5ga Anam-Dong, Sungbuk-Ku, Seoul 136-701, Republic of Korea
    • College of Life Sciences and Biotechnology, Korea University, 5ga Anam-Dong, Sungbuk-Ku, Seoul 136-701, Republic of Korea
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  • Hyun Jin Park

    Corresponding author
    1. College of Life Sciences and Biotechnology, Korea University, 5ga Anam-Dong, Sungbuk-Ku, Seoul 136-701, Republic of Korea
    2. Department of Packaging Science, Clemson University, Clemson, South Carolina 29634-0320
    • College of Life Sciences and Biotechnology, Korea University, 5ga Anam-Dong, Sungbuk-Ku, Seoul 136-701, Republic of Korea
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  • Seung In Hong and Jin Hwan Lee equally contributed to this work as co-first authors and Seok-Hoon Park and Hyun Jin Park equally contributed as co-corresponding authors.

Abstract

The dispersion of MMT-Na+ (montmorillonite) layers in a chitosan polymer matrix, using the homogenization, was performed. The effect of shear rate was characterized on the mechanical, barrier, and structural properties of nanocomposites. Elongation at break (EAB) was unaffected by shear rate, which decreased after homogenization, increased above 13,000 rpm, however, tensile strength (TS) dramatically increased up to 59 MPa at 16,000 rpm. Water vapor permeability (WVP) and oxygen permeability (OP) of the homogenized nanocomposite decreased more than that of untreated nanocomposite and OP was not significantly changed above 16,000 rpm of shear rate. XRD result and TEM images indicated that three types of tactoids, exfoliation, and intercalation were generated and the largest distance of 18.87 Å between MMT-Na+ layers was produced at 16,000 rpm. The results indicate that homogenization was a beneficial method for effectively dispersing MMT-Na+ layers in a chitosan polymer matrix and that a shear rate of 16,000 rpm was the effective condition. © 2010 Wiley Periodicals, Inc. J Appl Polym Sci, 2011

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