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Effect of molecular weight, acid, and plasticizer on the physicochemical and antibacterial properties of β-chitosan based films.
J Food Sci. 2012 May; 77(5):E127-36.JF

Abstract

Effects of chitosan molecular weight (1815 and 366 kDa), type of acid (1% acetic, formic, and propionic acid, or 0.5% lactic acid) and plasticizer (0, 25% glycerol or sorbital w/w chitosan) on the mechanical, water barrier, and antibacterial properties of β-chitosan films were investigated. Tensile strength (TS) of high molecular weight (Hw) films was 53% higher than that of low molecular weight (Lw) ones, acetate, and propionate films had the highest TS (43 and 40 MPa) among tested acids, and plasticizer-reduced film TS 34%. Film elongation at break (EL) was higher in Hw films than in Lw ones, in which formate and acetate films were the highest (9% and 8%, respectively), and plasticizer increased the film EL 128%. Molecular weight of chitosan did not influence water vapor permeability (WVP) of the films. Acetate and propionate films had lower WVP than other acid types of films, and plasticizer increased film WVP about 35%. No difference was found between glycerol and sorbitol films in terms of film mechanical and water barrier properties. Lw β-chitosan films showed significant antibacterial activity against E. coli and L. innocua. This study demonstrated that β-chitosan films are compatible to α-chitosan films in physicochemical properties and antibacterial activity, yet with simple sample preparation.

Links

Publisher Full Text (DOI)

Authors+Show Affiliations

Chen JL
Dept. of Food Science and Technology, Oregon State Univ., Corvallis, OR 97331, USA.
Zhao Y
No affiliation info available

MeSH

AcetatesAnti-Bacterial AgentsChemical PhenomenaChitosanEscherichia coliFood PackagingFormatesGlycerolListeriaMolecular WeightPermeabilityPlasticizersSorbitolSteamTensile StrengthWater

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

23163939

Citation

Chen, Jeremy L., and Yanyun Zhao. "Effect of Molecular Weight, Acid, and Plasticizer On the Physicochemical and Antibacterial Properties of Β-chitosan Based Films." Journal of Food Science, vol. 77, no. 5, 2012, pp. E127-36.
Chen JL, Zhao Y. Effect of molecular weight, acid, and plasticizer on the physicochemical and antibacterial properties of β-chitosan based films. J Food Sci. 2012;77(5):E127-36.
Chen, J. L., & Zhao, Y. (2012). Effect of molecular weight, acid, and plasticizer on the physicochemical and antibacterial properties of β-chitosan based films. Journal of Food Science, 77(5), E127-36. https://doi.org/10.1111/j.1750-3841.2012.02686.x
Chen JL, Zhao Y. Effect of Molecular Weight, Acid, and Plasticizer On the Physicochemical and Antibacterial Properties of Β-chitosan Based Films. J Food Sci. 2012;77(5):E127-36. PubMed PMID: 23163939.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Effect of molecular weight, acid, and plasticizer on the physicochemical and antibacterial properties of β-chitosan based films. AU - Chen,Jeremy L, AU - Zhao,Yanyun, PY - 2012/11/21/entrez PY - 2012/11/21/pubmed PY - 2013/4/26/medline SP - E127 EP - 36 JF - Journal of food science JO - J Food Sci VL - 77 IS - 5 N2 - Effects of chitosan molecular weight (1815 and 366 kDa), type of acid (1% acetic, formic, and propionic acid, or 0.5% lactic acid) and plasticizer (0, 25% glycerol or sorbital w/w chitosan) on the mechanical, water barrier, and antibacterial properties of β-chitosan films were investigated. Tensile strength (TS) of high molecular weight (Hw) films was 53% higher than that of low molecular weight (Lw) ones, acetate, and propionate films had the highest TS (43 and 40 MPa) among tested acids, and plasticizer-reduced film TS 34%. Film elongation at break (EL) was higher in Hw films than in Lw ones, in which formate and acetate films were the highest (9% and 8%, respectively), and plasticizer increased the film EL 128%. Molecular weight of chitosan did not influence water vapor permeability (WVP) of the films. Acetate and propionate films had lower WVP than other acid types of films, and plasticizer increased film WVP about 35%. No difference was found between glycerol and sorbitol films in terms of film mechanical and water barrier properties. Lw β-chitosan films showed significant antibacterial activity against E. coli and L. innocua. This study demonstrated that β-chitosan films are compatible to α-chitosan films in physicochemical properties and antibacterial activity, yet with simple sample preparation. SN - 1750-3841 UR - https://www.unboundmedicine.com/medline/citation/23163939/Effect_of_molecular_weight_acid_and_plasticizer_on_the_physicochemical_and_antibacterial_properties_of_β_chitosan_based_films_ L2 - https://doi.org/10.1111/j.1750-3841.2012.02686.x DB - PRIME DP - Unbound Medicine ER -