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Electrospun Polyvinyl Alcohol/d-Limonene Fibers Prepared by Ultrasonic Processing for Antibacterial Active Packaging Material - PubMed

  • ️Tue Jan 01 2019

Electrospun Polyvinyl Alcohol/d-Limonene Fibers Prepared by Ultrasonic Processing for Antibacterial Active Packaging Material

Weijie Lan et al. Molecules. 2019.

Abstract

Novel fibers containing different ratios of PVA and d-limonene were fabricated using electrospinning for antibacterial active packaging applications. The PVA/d-limonene fibers were thoroughly characterized using a scanning electron microscope, fourier-transform infrared spectrometry, thermal gravimetry, differential scanning calorimetry, tensile tests, and oxygen permeability tests. The results of these analyses showed that the highest tensile strength and elongation at break values of 3.87 ± 0.25 MPa and 55.62 ± 2.93%, respectively, were achieved for a PVA/d-limonene ratio of 7:3 (v/v) and an ultrasonication time of 15 min during processing. This material also showed the lowest oxygen permeation and the best degradability and bacteriostatic properties of all samples.

Keywords: antibacterial active packaging; d-limonene; polyvinyl alcohol.

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Conflict of interest statement

The authors declare no conflict of interest.

Figures

Figure 1
Figure 1

FTIR spectra of (a) pure PVA and pure

d

-limonene, and (b) PVA/

d

-limonene-5/5 fibers processed with different ultrasonication times.

Figure 2
Figure 2

DSC curves of cooling.

Figure 3
Figure 3

TGA curves of PVA/

d

-limonene fibers.

Figure 4
Figure 4

(a) SEM images of different PVA/

d

-limonene fibers; (b) average diameters of different fibers.

Figure 4
Figure 4

(a) SEM images of different PVA/

d

-limonene fibers; (b) average diameters of different fibers.

Figure 5
Figure 5

(a) Tensile strength and (b) elongation of PVA/

d

-limonene fibers with different volume ratios and ultrasonic processing times.

Figure 6
Figure 6

Oxygen permeability of different fibers with different ultrasonic times.

Figure 7
Figure 7

Degradation percentage of different fibers with different ultrasonic times.

Figure 8
Figure 8

Effect of PVA/

d

-limonene fibers on the growth inhibition (%) of S. aureus and E. coli.

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