Development of antimicrobial packaging materials by incorporation of gallic acid into Ca2+ crosslinking konjac glucomannan/gellan gum films

被引：58

作者：

Du, Yu ^{[1
]}

Sun, Jishuai ^{[1
]}

Wang, Lin ^{[1
]}

Wu, Chunhua ^{[1
]}

Gong, Jingni ^{[1
]}

Lin, Lishan ^{[1
]}

Mu, Ruojun ^{[2
]}

Pang, Jie ^{[1
]}

机构：

[1] Fujian Agr & Forestry Univ, Coll Food Sci, Fuzhou 350002, Fujian, Peoples R China

[2] Harvard Univ, Harvard John A Paulson Sch Engn & Appl Sci, 29 Oxford St, Cambridge, MA 02138 USA

来源：

INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES | 2019年 / 137卷

基金：

中国国家自然科学基金;

关键词：

Konjac glucomannan; Gellan gum; Antimicrobial package film; CONTROLLED-RELEASE; GELLAN GUM; GRAPHENE OXIDE; BLEND FILMS; CHITOSAN; POLYSACCHARIDE; MICROSPHERES;

D O I：

10.1016/j.ijbiomac.2019.06.079

中图分类号：

Q5 [生物化学]; Q7 [分子生物学];

学科分类号：

071010 ; 081704 ;

摘要：

Antibacterial films were prepared by incorporating konjac glucomannan (KGM) and gellan gum (GG) as a matrix, glycerin as a plasticizer, CaCl2 as a cross-linking agent, and gallic acid as a natural antibacterial agent. Structure was analyzed by using Fourier transform infrared spectroscopy (FTIR) and X-ray diffraction (XRD). Thermal stability of the blends was higher than pure GG, due to Ca2+ crosslinking between GG and KGM. Water contact angle and water vapor permeability were analyzed to determine hydrophobicity of films. Morphological studies revealed that surface compactness and homogeneity of blended films increased with KGM content. The addition of KGM improved the mechanical strength of films significantly. Moreover, KGM improved the release capacity of the blended films, while enhancing antimicrobial activity against Escherichia coli and Staphylococcus aureus. The antioxidant properties of gallic acid embedded in films were measured. Composite films containing 70 wt %KGM (Ca-KG7) displayed the best properties. These findings suggest an alternative method for synthesis of GG-based packaging films with improved properties. (C) 2019 Elsevier B.V. All rights reserved.

引用

页码：1076 / 1085

页数：10

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