4.7 Article

Microfluidic spinning of poly (methyl methacrylate)/konjac glucomannan active food packaging films based on hydrophilic/hydrophobic strategy

Journal

CARBOHYDRATE POLYMERS
Volume 222, Issue -, Pages -

Publisher

ELSEVIER SCI LTD
DOI: 10.1016/j.carbpol.2019.114986

Keywords

Konjac glucomannan; Microfluidic spinning technology; Hydrophilicity; Enhanced antibacterial effects; Microfiber films

Funding

  1. National Natural Science Foundation of China [31471704, 31772045]

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Here, inspired by the hydrophilic/hydrophobic theory, a novel konjac glucomannan/poly (methyl methacrylate)/chlorogenic acid (KGM/PMMA/CGA) food packaging film was successfully fabricated via microfluidic spinning technology (MST). The results of fourier transform infrared spectroscopy and x-ray diffraction confirmed the formation of hydrogen bonds in the films, which lead to the enhanced mechanical properties. Thermogravimetric analysis and differential scanning calorimetry showed excellent thermal stability of the films. Water vapor permeability (1.47x10(-5) +/- 0.11 g/(m.h.kPa)) and water contact angle (89.2 degrees) measurement proved that the films were hydrophobic. The good swelling degree (85.18 +/- 15.65%) indicated film's potentials in releasing CGA. More importantly, KGM played a key role in the antibacterial activities against Staphylococcus aureus (8.5 +/- 3.5 mm) and Escherichia coli (6.5 +/- 2.1 mm) by utilizing its hydrophilicity. Thus, our present work may provide a new idea for constructing active food packaging films with significant performances based on hydrophilic/hydrophobic strategy.

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