Rodríguez-Félix Francisco, Del-Toro-Sánchez Carmen Lizette, Tapia-Hernández José Agustín
Department of Research and Posgraduate in Food (DIPA), University of Sonora, Blvd. Luis Encinas y Rosales, S/N, Colonia Centro, 83000 Hermosillo, Sonora Mexico.
Food Sci Biotechnol. 2019 Nov 28;29(5):619-629. doi: 10.1007/s10068-019-00702-9. eCollection 2020 May.
The objective of this work was propose antisolvent-dialysis as a new, easy, one-step and reproducible method for obtaining white zein micro- and nanoparticles powder. Firstly, the study by SEM of white zein powder predicted micro- and nanoparticles with spherical morphology and average diameters of 243.2 ± 94.5 nm for nanoparticles and 0.74 ± 0.2 μm for microparticles. UV-Vis predicted lower absorbance of 250-500 nm for white zein powder compared to commercial yellow zein powder. FT-IR showed shifting of the main bands to the right, due to changes in particle-shaped microstructure that acquires white zein powder compared to yellow zein powder. In TGA white zein powder showed a decomposition range from 214 to 400 °C, while yellow zein powder from 240 to 400 °C. Therefore, antisolvent-dialysis is new method to obtain white zein micro- and nanoparticles with potential applications such as polymer matrix and white natural coloring.
这项工作的目的是提出反溶剂透析法，作为一种新型、简便、一步且可重复的方法来获得白色玉米醇溶蛋白微米和纳米颗粒粉末。首先，通过扫描电子显微镜（SEM）对白色玉米醇溶蛋白粉末进行的研究预测，纳米颗粒的形态为球形，平均直径为243.2±94.5纳米，微米颗粒的平均直径为0.74±0.2微米。紫外可见光谱（UV-Vis）预测，与市售黄色玉米醇溶蛋白粉末相比，白色玉米醇溶蛋白粉末在250 - 500纳米处的吸光度较低。傅里叶变换红外光谱（FT-IR）显示，与黄色玉米醇溶蛋白粉末相比，白色玉米醇溶蛋白粉末由于颗粒状微观结构的变化，其主要谱带向右移动。在热重分析（TGA）中，白色玉米醇溶蛋白粉末的分解范围为214至400℃，而黄色玉米醇溶蛋白粉末的分解范围为240至400℃。因此，反溶剂透析法是一种获得白色玉米醇溶蛋白微米和纳米颗粒的新方法，具有在聚合物基质和白色天然色素等方面的潜在应用。
