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

Wanmei Lin; Yongsheng Ni; Jie Pang

doi:10.1016/j.carbpol.2019.114986

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

Carbohydr Polym. 2019 Oct 15:222:114986. doi: 10.1016/j.carbpol.2019.114986. Epub 2019 Jun 11.

Authors

Wanmei Lin¹, Yongsheng Ni¹, Jie Pang²

Affiliations

¹ College of Food Science, Fujian Agriculture and Forestry University, Fuzhou 350002, China.
² College of Food Science, Fujian Agriculture and Forestry University, Fuzhou 350002, China. Electronic address: pang3721941@163.com.

PMID: 31320090
DOI: 10.1016/j.carbpol.2019.114986

Abstract

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 (1.47 × 10^-5 ± 0.11 g/(m⋅h⋅kPa)) and water contact angle (89.2°) 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.

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