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Composite films based on chitosan and epigallocatechin gallate grafted chitosan: Characterization, antioxidant and antimicrobial activities

The effect of chitosan-epigallocatechin gallate conjugate (CS-EGCG) at various ratios (10:0, 9:1, 8:2, 7:3, 6:4 and 5:5, w/w) and glycerol (30 and 50%, w/w) on mechanical, barrier and optical properties of CS films and CS/CSEGCG composite films was studied. CS films added with 30 or 50% glycerol (CS...

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Bibliographic Details
Main Authors: Ajay Mittal, Avtar Singh, Soottawat Benjakul, Thummanoon Prodprana, Krisana Nilsuwan, Nurul Huda, Koro de laCaba
Format: Article
Language:English
English
Published: Elsevier Ltd. 2020
Subjects:
Q1-295 General
TX341-641 Nutrition. Foods and food supply
Online Access:https://eprints.ums.edu.my/id/eprint/31300/1/Composite%20films%20based%20on%20chitosan%20and%20epigallocatechin%20gallate%20grafted%20chitosan.pdf
https://eprints.ums.edu.my/id/eprint/31300/2/Composite%20films%20based%20on%20chitosan%20and%20epigallocatechin%20gallate%20grafted%20chitosan2.pdf
https://eprints.ums.edu.my/id/eprint/31300/
https://www.sciencedirect.com/science/article/pii/S0268005X20318658?casa_token=TfV4P2rqF1MAAAAA:znSeWK_83PCuukG9xCohESU_kmvKsO3SWasEHs0CjJrf-0hllW8rLxwSM2u1xBHz-KU1trZ1
https://doi.org/10.1016/j.foodhyd.2020.106384
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Summary:The effect of chitosan-epigallocatechin gallate conjugate (CS-EGCG) at various ratios (10:0, 9:1, 8:2, 7:3, 6:4 and 5:5, w/w) and glycerol (30 and 50%, w/w) on mechanical, barrier and optical properties of CS films and CS/CSEGCG composite films was studied. CS films added with 30 or 50% glycerol (CS-30G or CS-50G, respectively) had high tensile strength and elongation at break. Generally, CS/CS-EGCG composite films had higher resistance to light transmission than CS films (p < 0.05). With augmenting concentrations of CS-EGCG, films with lower lightness (L*) and higher redness (a*) and yellowness (b*) were obtained. Therefore, among composite films, those with CS/CS-EGCG ratio of 8:2, containing 30 or 50% glycerol, were selected for further analyses in comparison to CS films. Composite films, regardless of glycerol levels, showed higher antioxidant and antimicrobial activities as compared to CS films (p < 0.05). Overall, CS/CS-EGCG (8:2) composite films had satisfactory physical properties with increased antimicrobial and antioxidant activities and could serve as promising packaging for food shelf-life extension.

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