"Stability of beta-carotene in polyethylene oxide electrospun nanofibers",
Applied Surface Science
, vol. 370, pp. 111–116, May, 2016.
<p>b-carotene (bc) was successfully incorporated into electrospun nanofibers of poly-(ethylene oxide) (PEO)with the aim of prolonging its shelf life and thermal stability. The physical and thermal properties of the bc-PEO-nanofibers were determined by scanning electron microscopy (SEM), color analysis, and differ-ential scanning calorimetry (DSC). The nanofibers of PEO and bc-PEO exhibited average fiber diameters of320 ± 46 and 230 ± 21 nm, with colorimetric coordinates L* = 95.7 ± 2.4 and 89.4 ± 4.6 and b* = −0.5 ± 0.1and 6.2 ± 3.0 respectively. Thermogravimetric analysis coupled with Proton Transfer–Mass Spectroscopy(TGA/PTR-MS) demonstrated that coated bc inside PEO nanofibers increased thermal stability when compared to standard bc in powder form. In addition, b-carotene in the membranes showed higher stabilityduring storage when compared with b-carotene in solution with a decrease in concentration of 57 ± 4%and 70 ± 2% respectively, thus should extend the shelf life of this compound. Also, TGA coupled withPTR–MS resulted in a promising technique to online-monitoring thermal degradation.</p>