Amphiphilic diethylaminoethyl chitosan of high molecular weight as an edible film

Author(s)

Cunha, Otavio da Mata ^[1] ; Furuyama Lima, Aline Margarete ^[1] ; Garrido Assis, Odilio Benedito ^[2] ; Tiera, Marcio Jose ^[1] ; de Oliveira Tiera, Vera Aparecida ^[1]

Affiliation

^[1] Univ Estadual Paulista, Inst Biociencias Letras & Ciencias Exatas, Dept Quim & Ciencias Ambientais, Lab Biomat & Nanotecnol, UNESP, Campus Sao Jose do Rio Preto, 2265, BR-1505400 Sao Jose Do Rio Preto, Estado De Sao P - Brazil

^[2] EMBRAPA, Empresa Brasileira Pesquisa Agr, Rua 15 Novembro, 1452, BR-13560970 Sao Carlos, Estado De Sao P - Brazil

• Document type: Journal article
• Source: International Journal of Biological Macromolecules; v. 164, p. 3411-3420, DEC 1 2020.
• Web of Science Citations: 4

Abstract

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. (C) 2020 Elsevier B.V. All rights reserved. (AU)

• FAPESP's process: 16/15736-0 - "Biopolymer Films based on Amphiphilic Derivatives of Chitosan as Antimicrobial Agents: Applications and Mode of Action"
• Grantee: Vera Aparecida de Oliveira Tiera
• Support type: Regular Research Grants
• FAPESP's process: 17/13762-7 - Synthesis and antimicrobial activity of biopolimer film of high molecular mass dietilaminoetil chitosan
• Grantee: Otávio da Mata Cunha
• Support type: Scholarships in Brazil - Master