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Freshness Maintenance of Polyethylene Film Containing Surface-modified Zeolite  

Chun Byoung Chul (Department of Polymer Engineering, The University of Suwon)
Lee Seong Jae (Department of Polymer Engineering, The University of Suwon)
Chung Mi Hwa (Department of Polymer Engineering, The University of Suwon)
Park Jung Hwan (Department of Chemistry, The University of Suwon)
Park Hee Woo (Department of Chemistry, The University of Suwon)
Chung Yong-Chan (Department of Chemistry, The University of Suwon)
Kweon Oh Cheul (Institute of Packaging Development and Research)
Publication Information
Food Science and Preservation / v.11, no.4, 2004 , pp. 478-484 More about this Journal
Abstract
Freshness maintenance of polyethylene packaging film containing surface-modified zeolite was investigated depending on the nature of substituted cations and cationic surfactants. Freshness maintenance was designed to work by cation or cationic surfactant adsorbed onto the zeolite surface by ion-exchange method. Cationic surfactants such as DODAB (n-dodecyltrimethylammonium bromide), CTAB (n-cetyltrimethylammonium bromide), and DHAB (n-dihexadecyldime-thylammonium bromide), and cations ($Ce^{3+},\;Al^{3+},\;Mg^{2+},\;Ca^{2+},\;Ag^{3+},\;Na^{1+}\;and\;Cu^{3+}$) were used. Surface-modified zeolite powder was compounded with LDPE to produce $20\;wt\%$ zeolite masterbatch (M/B), and the M/B was again blended with LDPE to get zeolite-containing LDPE films with 3, 5, $10\;wt\%$ of zeolite (width: 40 cm, thickness: $40\;{\mu}m$). Mechanical properties of zeolite-containing LDPE films generally decreased with increasing zeolite content. However, cationic surfactant-modified zeolite film showed the better mechanical properties compared to cation-modified zeolite film. As for the freshness maintenance, the zeolite-containing films modified with cationic surfactants or cations ($Al^{3+},\;Ag^{3+}$) showed the best performance.
Keywords
zeolite; surface-modified; freshness-maintenance;
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