Polystyrene bioactive nanofibers using orange oil as an ecofriendly solvent

Abstract

Solution blow spun polystyrene (PS) nanofibers were produced from 20 to 30 wt % PS solutions using toluene (industrial solvent) and orange oil (green solvent). The latter being composed of D-limonene (97.06%) as determined by gas chromatography-mass spectroscopy. The rheological behavior and volatility of the solvents and polymer solutions were correlated with fiber morphology, accessed by scanning electron microscopy. Thermal analysis was used to determine the thermal behavior of fibers. The antimicrobial activity of orange oil was tested for potential applications of the spun mats in active food packaging. Results showed that the nanofibers spun from orange oil solutions had average diameters of 306 AE 74 nm as opposed to 441 AE 110 nm for toluene. Moreover, when compared with fiber spun from toluene solutions, orange oil yielded more flexible fibers with slightly lower contact angles and better antimicrobial properties due to the presence of residual oil confirmed by Fourier-transform infrared spectroscopy.

Brazilian Agro-industrial Wastes as Potential Textile and Other Raw Materials: a Sustainable Approach

“…The applicability with this fiber involves crafts (Nunes et al 2020), green composites (Lomelí-Ramírez et al 2018, and copolymers (Rosa et al 2009), in particular, for the removal of chromium from tannery effluents (Cunha et al 2018). Orange term presents the greatest intensity of studies with the pomace, for the generation of nanofibers (Miranda et al 2019), nanocellulose (Mariño et al 2018(Mariño et al , 2016, and adsorbent of dyes (Nascimento et al 2014). The grape appears with its research in the stalk, in the development of polymeric composites (Borsoi et al 2020;Taurino et al 2020), and removal of blue and brown textile dyes (Benvenuti et al 2020;Oliveira et al 2018b, a).…”

Antifungal and physicochemical properties of Ocimum essential oil loaded in poly(lactic acid) nanofibers

“…The samples (100 fibres) were analysed by image software (Image J, National Institutes of Health, Bethesda, MD, USA) to determine the average fibre diameter (Miranda et al . 2019).…”

“…For each spectrum, 32 consecutive assays were recorded at a resolution of 4 cm −1 in the spectral range of 4000 to 400 cm −1 (Miranda et al . 2019).…”

“…In addition, studies indicate that the hydrophobicity of nanofibres also depends on the surface morphology (diameter and pore size), and the interaction between water and material is related to its surface area. That is, there is a tendency for an increase in the hydrophobicity to occur with the increase in the surface area of PLA nanofibres (Chen et al 2011;Toncheva et al 2011;Miranda et al 2019).…”

The Food–Materials Nexus: Next Generation Bioplastics and Advanced Materials from Agri‐Food Residues

“…Solution blow spinning has been used to produce nanofibrous mats from waste EPS using a FLW‐derived solvent comprising 97% d‐limonene. [ 495 ] The variables affecting yield, morphology, alignment, and others are many, but include those associated with the spinning solution (e.g., solvent type, surface tension, solid content, and MW), the setup (e.g., nozzle geometry, nozzle‐to‐collector distance, and collecting surface), processing parameters (e.g., feeding rate and gas pressure), and environmental conditions (e.g., temperature and relative humidity), as detailed elsewhere. [ 507 ]…”