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Impact of acid type for chitosan dissolution on the characteristics and biodegradability of cornstarch/chitosan based films.
Int J Biol Macromol. 2019 Oct 01; 138:693-703.IJ

Abstract

Biopolymers have received considerable attention in recent years given the environmental concern related to the incorrect disposal of materials based on synthetic plastics. Starch and chitosan are good examples of raw materials of interest, and its combination can exhibit some newsworthy barrier and mechanical properties. Therefore, this study aimed to determine the impact of the acid type, acetic and lactic solutions (1% v/v), used for chitosan solubilization and the starch:chitosan proportion on the properties of cornstarch/chitosan-based films. The films were prepared by casting and characterized by analyses of water vapor permeability, tensile strength, elongation, elastic modulus, antimicrobial activity, and biodegradability. Mechanical properties analyses showed that the films prepared by using acetic acid presented higher rigidity and lower deformation, giving higher values of Young's Modulus and a smaller percentage of elongation, in comparison to the films fabricated with lactic acid. Besides, starch/chitosan films containing acetic acid also exhibited better water vapor barrier properties, showing smaller water permeation values. Moreover, the antimicrobial activity of the cornstarch-based films containing chitosan was confirmed, obtaining better results for the blended films prepared with lactic acid, indicating a high potential for the development of active packaging. For the biodegradation tests, all samples started the degradation after 15 days.

Authors+Show Affiliations

Laboratory of Packaging Technology and Membrane Development - LATEM, Department of Chemical Engineering, Federal University of Rio Grande do Sul (UFRGS), Rua Ramiro Barcellos, 2777 - Anexo I, ZC: 90035-007 Porto Alegre, RS, Brazil. Electronic address: jumenega@enq.ufrgs.br.Laboratory of Packaging Technology and Membrane Development - LATEM, Department of Chemical Engineering, Federal University of Rio Grande do Sul (UFRGS), Rua Ramiro Barcellos, 2777 - Anexo I, ZC: 90035-007 Porto Alegre, RS, Brazil. Electronic address: claudia2@enq.ufrgs.br.Laboratory of Packaging Technology and Membrane Development - LATEM, Department of Chemical Engineering, Federal University of Rio Grande do Sul (UFRGS), Rua Ramiro Barcellos, 2777 - Anexo I, ZC: 90035-007 Porto Alegre, RS, Brazil. Electronic address: isabel@enq.ufrgs.br.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

31306704

Citation

Pavoni, Julia Menegotto Frick, et al. "Impact of Acid Type for Chitosan Dissolution On the Characteristics and Biodegradability of Cornstarch/chitosan Based Films." International Journal of Biological Macromolecules, vol. 138, 2019, pp. 693-703.
Pavoni JMF, Luchese CL, Tessaro IC. Impact of acid type for chitosan dissolution on the characteristics and biodegradability of cornstarch/chitosan based films. Int J Biol Macromol. 2019;138:693-703.
Pavoni, J. M. F., Luchese, C. L., & Tessaro, I. C. (2019). Impact of acid type for chitosan dissolution on the characteristics and biodegradability of cornstarch/chitosan based films. International Journal of Biological Macromolecules, 138, 693-703. https://doi.org/10.1016/j.ijbiomac.2019.07.089
Pavoni JMF, Luchese CL, Tessaro IC. Impact of Acid Type for Chitosan Dissolution On the Characteristics and Biodegradability of Cornstarch/chitosan Based Films. Int J Biol Macromol. 2019 Oct 1;138:693-703. PubMed PMID: 31306704.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Impact of acid type for chitosan dissolution on the characteristics and biodegradability of cornstarch/chitosan based films. AU - Pavoni,Julia Menegotto Frick, AU - Luchese,Cláudia Leites, AU - Tessaro,Isabel Cristina, Y1 - 2019/07/12/ PY - 2019/02/28/received PY - 2019/07/11/revised PY - 2019/07/12/accepted PY - 2019/7/16/pubmed PY - 2020/1/28/medline PY - 2019/7/16/entrez KW - Active packaging KW - Biodegradability KW - Biopolymer blend KW - Chitosan KW - Cornstarch KW - Water vapor barrier SP - 693 EP - 703 JF - International journal of biological macromolecules JO - Int J Biol Macromol VL - 138 N2 - Biopolymers have received considerable attention in recent years given the environmental concern related to the incorrect disposal of materials based on synthetic plastics. Starch and chitosan are good examples of raw materials of interest, and its combination can exhibit some newsworthy barrier and mechanical properties. Therefore, this study aimed to determine the impact of the acid type, acetic and lactic solutions (1% v/v), used for chitosan solubilization and the starch:chitosan proportion on the properties of cornstarch/chitosan-based films. The films were prepared by casting and characterized by analyses of water vapor permeability, tensile strength, elongation, elastic modulus, antimicrobial activity, and biodegradability. Mechanical properties analyses showed that the films prepared by using acetic acid presented higher rigidity and lower deformation, giving higher values of Young's Modulus and a smaller percentage of elongation, in comparison to the films fabricated with lactic acid. Besides, starch/chitosan films containing acetic acid also exhibited better water vapor barrier properties, showing smaller water permeation values. Moreover, the antimicrobial activity of the cornstarch-based films containing chitosan was confirmed, obtaining better results for the blended films prepared with lactic acid, indicating a high potential for the development of active packaging. For the biodegradation tests, all samples started the degradation after 15 days. SN - 1879-0003 UR - https://www.unboundmedicine.com/medline/citation/31306704/Impact_of_acid_type_for_chitosan_dissolution_on_the_characteristics_and_biodegradability_of_cornstarch/chitosan_based_films_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0141-8130(19)31544-2 DB - PRIME DP - Unbound Medicine ER -