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Start Over Author "Pang, Jie" Journal international journal of biological macromolecules
42 results on '"Pang, Jie"'

27. Investigation of the structural and physical properties, antioxidant and antimicrobial activity of konjac glucomannan/cellulose nanocrystal bionanocomposite films incorporated with phlorotannin from Sargassum

Author

Pang Jie, Chengrong Wen, Zhiqin Wu, Cailing Tong, Jishuai Sun, Chunhua Wu, Haixin Jiang, Jiaxuan Zhang, and Duan Mengxia

Subjects
Thermogravimetric analysis, Materials science, Chemical Phenomena, Scanning electron microscope, Active packaging, Biocompatible Materials, Microbial Sensitivity Tests, Biochemistry, Antioxidants, Permeability, Mannans, chemistry.chemical_compound, Differential scanning calorimetry, Anti-Infective Agents, Structural Biology, Ultimate tensile strength, Cellulose, Molecular Biology, Mechanical Phenomena, Spectrum Analysis, Sargassum, General Medicine, Microstructure, Steam, chemistry, Chemical engineering, Nanocrystal, Thermogravimetry, Nanoparticles, Thermodynamics
Abstract

In this study, environmentally friendly bionanocomposite films were prepared by incorporating phlorotannins from Sargassum (PS) into konjac glucomannan (KGM)/cotton cellulose nanocrystals (CNC) composites. The effects of different concentrations of PS (5%, 9%, 13%, and 17%, w/w) on the microstructure, physical properties, antioxidant and antibacterial activities of the resultant bionanocomposite films were evaluated. The results of scanning electron microscopy, X-ray diffraction, and Fourier-transform infrared spectra showed that PS was well compatible with the KGM/CNC composites matrix, which led to form a compact and uniform structure of the films. Thermogravimetric analysis and differential scanning calorimetry demonstrated that incorporating PS improved the heat stability of KGM/CNC bionanocomposite films. And addition of the appropriate amount of PS improved the mechanical and water-vapor barrier-related properties of the bionanocomposite film. For instance, with 9% PS, the tensile strength of the KGM/CNC/PS bionanocomposite film increased by 33.9%, and the water-vapor transmittance decreased by 41.67% compared to that of the KGM/CNC films. Moreover, the addition of PS endowed the KGM/CNC film with excellent antioxidant and antibacterial properties. Therefore, KGM/CNC/PS bionanocomposite films have great potential to be applicated as active packaging in the food packaging industry.

Published
2021

42. Development of antimicrobial packaging materials by incorporation of gallic acid into Ca 2+ crosslinking konjac glucomannan/gellan gum films.

Author

Du Y, Sun J, Wang L, Wu C, Gong J, Lin L, Mu R, and Pang J

Subjects
Antioxidants chemistry, Antioxidants pharmacology, Escherichia coli drug effects, Mechanical Phenomena, Nanocomposites chemistry, Permeability, Staphylococcus aureus drug effects, Steam, Temperature, Anti-Bacterial Agents chemistry, Anti-Bacterial Agents pharmacology, Calcium chemistry, Gallic Acid chemistry, Mannans chemistry, Polysaccharides, Bacterial chemistry, Product Packaging
Abstract

Antibacterial films were prepared by incorporating konjac glucomannan (KGM) and gellan gum (GG) as a matrix, glycerin as a plasticizer, CaCl 2 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 Ca 2+ 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., (Copyright © 2019 Elsevier B.V. All rights reserved.)

Published
2019
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