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Erschienen in: Cellulose 3/2019

01.01.2019 | Original Research

Active packaging based on cellulose-chitosan-Ag/TiO2 nanocomposite for storage of clarified butter

verfasst von: Robert Apjok, Anca Mihaly Cozmuta, Anca Peter, Leonard Mihaly Cozmuta, Camelia Nicula, Monica Baia, Adriana Vulpoi

Erschienen in: Cellulose | Ausgabe 3/2019

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Abstract

Three active cellulose-based papers coated in chitosan (P-CH), chitosan-TiO2 (P-CH-TiO2) and chitosan-Ag/TiO2 (P-CH-Ag/TiO2), respectively were real-time aged for 6 months at 4°C, 55% relative humidity, 15 h light/9 h dark cycle and characterized in relation to plain paper (P). The reduction in the chitosan cristallinity, N-deacetylation of chitosan, degradation of cellulosic fibers and loss in the active agents (proven by SEM, FTIR, EDX techniques and physical-chemical-microbial measurements) occurred during storage explains the deterioration of the barrier and antimicrobial properties of the active papers and subsequently the decrease in their preservation efficiency. Experimental results indicate that after storage for 6 months of the clarified butter the most effective package was P-CH-Ag/TiO2 for which the lowest levels of PV (2.72 mEq O2/kg), yeasts and molds (5.8 CFU/g) and E. coli (6.12 CFU/g) counts were measured. By mathematical modeling of the evolution of the PV, E. coli, yeasts and molds experimental profiles the shelf-life of the clarified butter packed in P, P-CH, P-CH-TiO2 and P-CH-Ag/TiO2 was assessed in respect to their admitted limits to 1.6, 2, 4 and 9.3 months, respectively. At the end of storage the appearance of P-CH-Ag/TiO2 package was clean, without greasy spots, as opposed to that of P, P-CH and P-CH-TiO2, which proves its self-cleaning property.

Graphical Abstract

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Metadaten
Titel
Active packaging based on cellulose-chitosan-Ag/TiO2 nanocomposite for storage of clarified butter
verfasst von
Robert Apjok
Anca Mihaly Cozmuta
Anca Peter
Leonard Mihaly Cozmuta
Camelia Nicula
Monica Baia
Adriana Vulpoi
Publikationsdatum
01.01.2019
Verlag
Springer Netherlands
Erschienen in
Cellulose / Ausgabe 3/2019
Print ISSN: 0969-0239
Elektronische ISSN: 1572-882X
DOI
https://doi.org/10.1007/s10570-018-02226-7

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