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. 2024 Nov 28;17(23):5843.
doi: 10.3390/ma17235843.

Characterization of Myrrh Extract Effect on Polylactide and Polypropylene Melt Spun Multifilament Yarn Structure and Properties

Evaldas Bolskis  1 , Egidijus Griškonis  2 , Mindaugas Marksa  3 , Lina Ragelienė  4 , Erika Adomavičiūtė  1
Affiliations

Characterization of Myrrh Extract Effect on Polylactide and Polypropylene Melt Spun Multifilament Yarn Structure and Properties

Evaldas Bolskis et al. Materials (Basel). .

Abstract

Myrrh has unique medicinal properties: it is an anti-inflammatory, antifungal, and antibacterial material. The aim of this study was to assess the influence of ethanolic myrrh extract on the production and properties of modified PP and PLA melt spun yarns. In this work, multifilament yarns of polylactide (PLA) and polypropylene (PP) containing 10 wt% myrrh resin at different melt-spinning drawing ratios (DRs) were prepared. The results of scanning electron microscopy revealed that the multifilament yarns from polymers covered by myrrh resin extract had a smooth surface without cracks or visible myrrh derivatives. The influence of myrrh resin on the mechanical properties of PP and PLA multifilament yarns was analyzed, and it was found that the presence of myrrh (PP/M, PLA/M) increased tenacity (cN/tex) and decreased the tensile strain (%) of melt spun yarns obtained at different draw ratios (DRs). During optical analysis, it was found that the absorbance of yarns increased in the entire UV region of the spectra, which was most likely determined by the presence of myrrh. The degree of crystallinity and the wetting angle of PP/M and PLA/M multifilament yarns increased compared with the pure PLA and PP multifilament yarns. This study concludes that the presence of myrrh derivatives influences PLA yarns degradation rate and antibacterial effects against Gram-positive bacteria.

Keywords: PLA; antibacterial activity; melt spinning; multifilament yarns; myrrh.

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Conflict of interest statement

The authors declare no conflict of interest.

Figures

Figure 1
Figure 1
Principal scheme of equipment for measurement of yarn liquid contact angle: (1) Stereoscopic microscope, (2) digital camera, (3) computer, (4) yarn anchorage system, (5) pipette, (6) light source, (7) drop of liquid on the yarn, (8) picture of the video record [53].
Figure 2
Figure 2
Bacterial suspension dilution scheme.
Figure 3
Figure 3
GC/MS chromatograms of ethanolic myrrh extract.
Figure 4
Figure 4
SEM images of (a) PLA3, (b) PLA/M3, (c) PP3, and (d) PP/M3.
Figure 5
Figure 5
The dependence on linear density of PP, PP/M, PLA, and PLA/M melt spun yarns at different draw ratios (DRs).
Figure 6
Figure 6
The dependence of the tenacity of melt spun yarns PP, PP/M, PLA, and PLA/M on different draw ratio (DR).
Figure 7
Figure 7
The dependence of the tensile strain of melt spun yarns ((a)—PP, PP/M; (b)—PLA, PLA/M) on different draw ratios (DRs).
Figure 8
Figure 8
UV–Vis spectra of (a) PLA3 and PLA/M3; (b) PP3 and PP/M3.
Figure 9
Figure 9
DSC thermograms of (a) PLA3 and PLA/M3; (b) PP3 and PP/M3.
Figure 10
Figure 10
Raman spectra of (a) pure PLA3 and PLA/M3; (b) pure PP3 and PP/M3.
Figure 11
Figure 11
Comparative Raman spectra of the wavenumber region 1350–1500 cm−1.
Figure 12
Figure 12
Weight loss of PLA3 and PLA/M3 multifilament yarns.
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