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Stability of beta-carotene in polyethylene oxide electrospun nanofibers

机译:β-胡萝卜素在聚环氧乙烷电纺纳米纤维中的稳定性

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beta-carotene (beta c) 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 beta c-PEO-nanofibers were determined by scanning electron microscopy (SEM), color analysis, and differential scanning calorimetry (DSC). The nanofibers of PEO and beta c-PEO exhibited average fiber diameters of 320 +/- 46 and 230 +/- 21 nm, with colorimetric coordinates L* = 95.7 +/- 2.4 and 89.4 +/- 4.6 and b* =-0.5 +/- 0.1 and 6.2 +/- 3.0 respectively. Thermogravimetric analysis coupled with Proton Transfer-Mass Spectroscopy (TGA/PTR-ms) demonstrated that coated beta c inside PEO nanofibers increased thermal stability when compared to standard beta c in powder form. In addition, beta-carotene in the membranes showed higher stability during storage when compared with beta-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 with PTR-MS resulted in a promising technique to online-monitoring thermal degradation. (C) 2016 Elsevier B.V. All rights reserved.
机译:β-胡萝卜素(βc)被成功地引入到聚环氧乙烷(PEO)的电纺纳米纤维中,以延长其保质期和热稳定性。 βc-PEO纳米纤维的物理和热学性质通过扫描电子显微镜(SEM),颜色分析和差示扫描量热法(DSC)确定。 PEO和βc-PEO的纳米纤维表现出320 +/- 46和230 +/- 21 nm的平均纤维直径,色度坐标L * = 95.7 +/- 2.4和89.4 +/- 4.6,b * = -0.5分别为+/- 0.1和6.2 +/- 3.0。热重分析与质子传递质谱法(TGA / PTR-ms)结合使用,表明与粉末形式的标准βc相比,PEO纳米纤维内部涂覆的βc增加了热稳定性。此外,与溶液中的β-胡萝卜素相比,膜中的β-胡萝卜素在储存过程中显示出更高的稳定性,其浓度分别降低了57 +/- 4%和70 +/- 2%,因此应延长产品的货架期。这个化合物。此外,TGA与PTR-MS结合使用,产生了一种有前途的在线监测热降解的技术。 (C)2016 Elsevier B.V.保留所有权利。

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