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Food Hydrocolloids, Available online 2 January 2019, Volume 90, Pages 500-507 | https://doi.org/10.1016/j.foodhyd.2018.12.056 Carrageenan-based antimicrobial bionanocomposite films incorporated with ZnO nanoparticles stabilized by melanin

Abstract

Swarup Roy, Jong-Whan Rhim^*

Center for Humanities and Sciences, BioNanocomposite Research Center, Department of Food and Nutrition, Kyung Hee University, 26 Kyungheedae-ro, Dongdaemun-gu, Seoul, 02447, Republic of Korea

^*Corresponding author : Jong-Whan Rhim

Abstract
Zinc oxide nanoparticles (ZnONP) were prepared by reacting zinc acetate with KOH using melanin as a capping agent, and used for the preparation of antimicrobial carrageenan-based nanocomposite films. The ZnONP capped with melanin (mZnONP) was stable and flake-like, while the control ZnONP without capping was rod-like. ZnONPs, whether capped or not capped with melanin, were evenly dispersed in the carrageenan matrix to form smooth and flexible nanocomposite films. The mZnONP incorporated composite film (Carr/mZnONP) exhibited a higher UV-blocking property at the expense of less transparency than the control ZnONP incorporated nanocomposite film (Carr/ZnONP). The Carr/mZnONP composite film also exhibited higher thermal stability with increased mechanical and water vapor barrier properties than the Carr/ZnONP composite film. Both nanocomposite films exhibited strong antibacterial activity against Gram-negative foodborne pathogenic bacteria, E. coli, but slight antibacterial activity against Gram-positive bacteria, L. monocytogenes.

Keywords: Melanin; Zinc oxide nanoparticles; Carrageenan; Nanocomposite film; Antimicrobial activity

논문정보

형식Research article
게재일2019년 01월 (BRIC 등록일 2019-01-14)
연구진국내 연구진
분야 생명과학 > 식품학
구분구・농수식품

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