Rukchonlatee, Suparat

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Preferred name
Rukchonlatee, Suparat
Alternative Name
Rukchonlatee, S.
Main Affiliation
Email
suparat.ru@kmitl.ac.th

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    Item type:Publication,
    Improvement of water vapor permeability of LLDPE/EVA film with zeolite A as filler
    (2017-01-01)
    Rukchonlatee, Suparat
    ;
    Jaisomboon, Nattarika
    ;
    Sooknoi, Tawan
    In this work, water vapor permeability of linear low density polyethylene (LLDPE)/ethylene vinyl acetate copolymer (EVA) film is improved by incorporation of zeolite A as filler (0-25%wt) for prolonging shelf-life of fresh produces. All films were characterized by SEM, DSC, tensile testing, contact angle measurement and tested for water vapor permeability (WVP). The shelf-life of Bird's eye chili in the film samples was also tested at 10°C for 21 days. It was found that zeolite A particles were virtually dispersed in EVA phase. Accordingly, crystallinity and tensile properties of LLDPE/EVA/Zeolite A films is independent to zeolite loading. Despite, when zeolite loading was increased, the dispersion became low. The film's wetting behavior was enhanced by increasing zeolite content in the LLDPE/EVA/Zeolite A films. The observed increase in the film's polarity significantly enhances the WVP. Therefore, less water condensed can be found inside the package made with LL80E20Ze25 film, as compared to LLDPE or LLDPE/EVA film. The LL80E20Ze25 also possesses comparable tensile properties to the commercial LLDPE film and hence can used as packaging for extending the shelf-life of fresh produces.
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    Item type:Publication,
    Selective ethylene-permeable zeolite composite double-layered film for novel modified atmosphere packaging
    (2011-01-01)
    Monprasit, P.
    ;
    Ritvirulh, C.
    ;
    Sooknoi, T.
    ;
    Rukchonlatee, S.
    ;
    Fuongfuchat, A.
    The composite double-layered films, for the packaging application of postharvest fruits and vegetables, were prepared by laminating low-density polyethylene (LDPE) and poly[styrene-b-(ethylene-co-butylene)-b-styrene] (SEBS) modified with zeolite ZSM-5. The film was characterized by scanning electron microscope and differential scanning calorimeter and tested for permeation of ethylene (C<inf>2</inf>H<inf>4</inf>), oxygen (O<inf>2</inf>), carbon dioxide (CO<inf>2</inf>), and water vapor. It was found that the C<inf>2</inf>H <inf>4</inf> permeability of the films was improved because of an enhanced adsorption of C<inf>2</inf>H<inf>4</inf> by the incorporated zeolite (0-10 wt%). The preconcentrated layer (zeolite/SEBS) leads to a higher C<inf>2</inf>H <inf>4</inf> concentration gradient across the film. Moreover, the high dispersion of zeolite increased the C<inf>2</inf>H<inf>4</inf> permeation. When compared with O<inf>2</inf> and CO<inf>2</inf>, the composite films were more selective to C<inf>2</inf>H<inf>4</inf>. However, the C<inf>2</inf>H<inf>4</inf> permeation decreased in the presence of O<inf>2</inf> because of a competitive adsorption. In addition, the films possessed appreciate tensile properties for packaging application. Copyright © 2009 Society of Plastics Engineers.