Edible films and coatings can enhance the quality of food products, protecting them from biological deterioration, especially against fungal diseases and pathogenic microorganisms. In this study, films from chitosan, diethylaminoethyl-chitosan (DEAE-CH) and its hydrophobicized derivative DEAE-CH-DD were prepared by casting and their physicochemical and antimicrobial properties evaluated. The grafting with DEAE and dodecyl groups resulted in films with an elasticity modulus up to five times higher than commercial chitosan and increased water vapor permeability. Field emission gun - scanning electron microscopy and atomic force microscopy techniques showed films with smooth surfaces and the contact angle measurements revealed a correlation between the grafted group and hydrophilic/hydrophobic nature of the surface of the film. The amphiphilic derivatives exhibited better antimicrobial activity than unmodified chitosan against Penecillium expansum, Alternaria alternata and Alternaria solani. The amphiphilics DEAE-CH and DEAE-CH-DD showed no toxicity and delayed rotting and loss of water in strawberries and bananas, suggesting that this kind of film has great potential for increasing the shelf-life of different fruits.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1016/j.ijbiomac.2020.08.145 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Effect of zwitterionic sulfobetaine incorporation on blood behaviours, phagocytosis, and biodistribution of pH-responsive micelles with positive charges.
J Mater Chem B
February 2024
Department of Neurosurgery and Neurosurgery Research Laboratory, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, P. R. China.
pH-responsive micelles with positive charges are challenged by their significant effect on the cells/proteins and compromise their final fate due to electrostatic interactions. As one of the promising strategies, zwitterion incorporation in micelles has attracted considerable attention and displayed improved protein adsorption and blood circulation performances. However, previous reports in this field have been mostly limited in hemolysis for studying blood behaviour and lack a comprehensive understanding of their interactions with blood components.
View Article and Find Full Text PDFStereo-Complex and Click-Chemical Bicrosslinked Amphiphilic Network Gels with Temperature/pH Response.
Gels
August 2023
Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an 710119, China.
Stimulus-responsive hydrogels have been widely used in the field of drug delivery because of their three-dimensional pore size and the ability to change the drug release rate with the change in external environment. In this paper, the temperature-sensitive monomer 2-methyl-2-acrylate-2-(2-methoxyethoxy-ethyl) ethyl ester (MEOMA) and oligoethylene glycol methyl ether methacrylate (OEGMA) as well as the pH-sensitive monomer ,-Diethylaminoethyl methacrylate (DEAEMA) were used to make the gel with temperature and pH response. Four kinds of physicochemical double-crosslinked amphiphilic co-network gels with different polymerization degrees were prepared by the one-pot method using the stereocomplex between polylactic acid as physical crosslinking and click chemistry as chemical crosslinking.
View Article and Find Full Text PDFAcid-Responsive Adamantane-Cored Amphiphilic Block Polymers as Platforms for Drug Delivery.
Nanomaterials (Basel)
January 2021
School of Chemical Engineering & Light Industry, Guangdong University of Technology, Guangzhou 510006, China.
Four-arm star-shaped (denoted as 'S') polymer adamantane-[poly(lactic--glycolic acid)--poly(-diethylaminoethyl methacrylate) poly(ethylene glycol) monomethyl ether] (S-PLGA-D-P) and its linear (denoted as 'L') counterpart (L-PLGA-D-P) were synthesized, then their self-assembled micelles were further developed to be platforms for anticancer drug delivery. Two types of polymeric micelles exhibited strong pH-responsiveness and good drug loading capacity (21.6% for S-PLGA-D-P and 22.
View Article and Find Full Text PDFAmphiphilic diethylaminoethyl chitosan of high molecular weight as an edible film.
Int J Biol Macromol
December 2020
Instituto de Biociências, Letras e Ciências Exatas, Universidade Estadual Paulista, UNESP, Campus São José do Rio Preto, Departamento de Química e Ciências Ambientais, Laboratório de Biomateriais e Nanotecnologia, Cristóvão Colombo, 2265, São José do Rio Preto, Estado de São Paulo 15054-00, Brazil. Electronic address:
Edible films and coatings can enhance the quality of food products, protecting them from biological deterioration, especially against fungal diseases and pathogenic microorganisms. In this study, films from chitosan, diethylaminoethyl-chitosan (DEAE-CH) and its hydrophobicized derivative DEAE-CH-DD were prepared by casting and their physicochemical and antimicrobial properties evaluated. The grafting with DEAE and dodecyl groups resulted in films with an elasticity modulus up to five times higher than commercial chitosan and increased water vapor permeability.
View Article and Find Full Text PDFBiopolymeric Films of Amphiphilic Derivatives of Chitosan: A Physicochemical Characterization and Antifungal Study.
Int J Mol Sci
August 2019
Department of Chemistry and Environmental Sciences, Institute of Biosciences, Humanities and Exact Sciences, São Paulo State University, São José do Rio Preto, SP 15054-000, Brazil.
The chemical modification of chitosan has been an active subject of research in order to improve the physicochemical and antifungal properties of chitosan-based films. The aim of this study was to evaluate the physiochemical and antifungal properties of films prepared with chitosan and its derivatives containing diethylaminoethyl (DEAE) and dodecyl groups (Dod). Chitosans and selected derivatives were synthesized and characterized, and their films blended with glycerol and sorbitol (5%, 10%, and 20%).
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!