Orange essential oil as antimicrobial additives in poly(vinyl chloride) films

Silva, Carla Fabiana da; Oliveira, Flávia Suellen Melo de; Caetano, Viviane Fonseca; Vinhas, Glória Maria; Cardoso, Samara Alvachian

doi:10.1590/0104-1428.16216

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Original Article • Polímeros 28 (4) • Sept 2018 • https://doi.org/10.1590/0104-1428.16216 copy

Orange essential oil as antimicrobial additives in poly(vinyl chloride) films

Authorship SCIMAGO INSTITUTIONS RANKINGS

Abstract

In this work were developed and evaluated films of poly(vinyl chloride)-PVC additivated with orange essential oil – OEO. These films were evaluated with FT-IR spectroscopy; mechanical tests; migration OEO in simulants; and determination of stability after sterilization by gamma radiation at a dose of 25 kGy. The OEO was assessed with GC-MS and analysis of antimicrobial activity. The films were prepared by the casting solution technique. The essential oil concentrations in PVC were 2%, 10% and 30% (w/w). The results showed that the OEO was incorporated into the polymer matrix and that this oil had antimicrobial activity against the bacteria E. coli and S. aureus. The migration of OEO in the films occurred with all simulants. The incorporation of OEO in the films also made them more flexible. It was also found that additive with 30% w/w OEO provides a protective effect for the polymer after sterilization by gamma radiation.

Keywords:
antimicrobial activity; mechanical tests; migration; orange essential oil; poly(vinyl chloride)

Number	Component	Retention time (RT) (min)	Peak area (%)
1	p-Mentha-1(7), 3-diene	6.80	1.98
2	Limonene	7.07	79.97
3	Linalol	8.82	1.11
4	Decanal	10.64	0.93
5	n-Hexadecanoic acid	19.71	1.84
6	cis-13-Octadecenoic acid	21.41	3.95

Samples	Young’s Modulus (MPa) ^* * Values are presented as means ± standard deviation. Different letters in the same column indicate significant differences (p < 0.05).	Elongation-at-break (%) ^* * Values are presented as means ± standard deviation. Different letters in the same column indicate significant differences (p < 0.05).	Maximum Tensile(MPa) ^* * Values are presented as means ± standard deviation. Different letters in the same column indicate significant differences (p < 0.05).
PVC/2%OEO	1224.00 ± 28.83^a	5.628 ± 0.197^a	42.150 ± 1.451^a
PVC/10%OEO	1153.00 ± 143.28^a	6.056 ± 0.030^a	31.505 ± 1.278^b
PVC/30%OEO	755.93 ± 37.46^b	6.018 ± 0.726^a	33.410 ± 2.272^b
PVC	1275.00 ± 77.79^a	5.901 ± 0.344^a	43.580 ± 0.850^a

Samples	Young’s Modulus (MPa) ^* * Values are presented as means ± standard deviation. Different letters in the same column indicate significant differences (p < 0.05).	Elongation-at-break (%) ^* * Values are presented as means ± standard deviation. Different letters in the same column indicate significant differences (p < 0.05).	Maximum Tensile (MPa) ^* * Values are presented as means ± standard deviation. Different letters in the same column indicate significant differences (p < 0.05).
PVC/2%OEO	0.083 ± 0.006^a	1059.77 ± 112.18^a	6.232 ± 0.090^a
PVC/10%OEO	0.076 ± 0.025^a	941.65 ± 89.76^a	6.062 ± 0.192^a
PVC/30%OEO	0.089 ± 0.029^a	738.17 ± 10.01^b	5.770 ± 0.575^ab
PVC	0.076 ± 0.011^a	947.72 ± 44.19^a	5.476 ± 0.169^b

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