Kinetics and functional effectiveness of nisin loaded antimicrobial packaging film based on chitosan/poly(vinyl alcohol)

被引:95
作者
Wang, Hualin [1 ,3 ]
Zhang, Ru [1 ]
Zhang, Heng [1 ]
Jiang, Suwei [1 ]
Liu, Huan [1 ]
Sun, Min [1 ]
Jiang, Shaotong [2 ,3 ]
机构
[1] Hefei Univ Technol, Sch Chem & Chem Technol, Hefei 230009, Anhui, Peoples R China
[2] Hefei Univ Technol, Sch Biotechnol & Food Engn, Hefei 230009, Anhui, Peoples R China
[3] Anhui Inst Agroprod Intens Proc Technol, Hefei 230009, Anhui, Peoples R China
基金
中国国家自然科学基金;
关键词
Nisin-chitosan/poly(vinyl alcohol); Antimicrobial packaging film; Kinetics; Thermodynamics; Functional effectiveness; POTASSIUM SORBATE; POLYVINYL-ALCOHOL; DRUG-RELEASE; CHITOSAN; BLEND; ADSORPTION; DIFFUSION; PROTEIN; SURFACES;
D O I
10.1016/j.carbpol.2015.03.058
中图分类号
O69 [应用化学];
学科分类号
081704 ;
摘要
The aim of this study was to evaluate the kinetics and functional effectiveness of Nisin loaded chitosan/poly(vinyl alcohol) (Nisin-CS/PVA) as an antibacterial packaging film. The films were prepared by coating method and Staphylococcus aureus (S. aureus, ATCC6538) was used as test bacterium. The intermolecular hydrogen bonds between CS and PVA molecules were confirmed. The elasticity of films was significantly improved by the incorporation of PVA, and the film could also bear a relative high tensile strength at 26.7 MPa for CS/PVA= 1/1. As CS/PVA ratio decreased, the water vapor permeability (WVP) decreased and reached its minimum value 0.983 x 10(-10) gm(-1) s(-1) at CS/PVA=1 /1, meanwhile, oxygen permeability (OP) increased but still lower than 0.91 cm(3) mu m m(-2) d(-1) kpa(-1) for CS/PVA= 1/1 as the CS/PVA ratio was above 1:1. The initial diffusion of nisin (Mt/M-infinity <2/3) from CS/PVA film could be well described by the Fickian diffusion equation. Owing to the positively charged nisin at pH below isoelectric point (pl, 8.8) and its increasing dissolubility in water as the pH reduced, the diffusion of nisin from the films strongly depended on pH and ionic strength besides CS/PVA ratio and temperature. Moreover, the thermodynamic parameters suggested the spontaneous and endothermic diffusion of nisin from the films. The resulting data can provide some valuable information for the design of film in structure and ingredient. (C) 2015 Elsevier Ltd. All rights reserved.
引用
收藏
页码:64 / 71
页数:8
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