Department of Food and Nutrition, BioNanocomposite Research Center, Kyung Hee University, Seoul 02447, Republic of Korea; Nanotechnology and Advanced Materials Central Lab, Regional Center for Food & Feed, Agricultural Research Center, Giza, Egypt.
Department of Food and Nutrition, Kunsan National University, Gunsan 54150, Republic of Korea.
Int J Biol Macromol. 2022 Jan 1;194:736-745. doi: 10.1016/j.ijbiomac.2021.11.119. Epub 2021 Nov 25.
Poly (vinyl alcohol) (PVA) films with high transparency, UV-barrier, antioxidant, and antimicrobial properties were prepared using oregano essential oil (OEO) and cinnamon essential oil (CEO) Pickering emulsions. The effect of Pickering emulsion type and concentration on the PVA film properties was studied. Cellulose nanocrystals (CNCs) were used as a natural stabilizer to prepare OEO and CEO Pickering emulsions. Both emulsions showed spherical droplets with diameters of 155-291 nm, zeta potential of -36.2 to -49.6 mV, minimum inhibition concentration of 6.25-12.5 μL/mL, and inhibition zone of 40-65 mm, depending on oil type. Morphology and FTIR analysis showed that OEO and CEO Pickering emulsions were compatible with the PVA matrix. The UV-transmittance of PVA films decreased from 77.3% to 30.4% and 2.0% without sacrificing the transparency after adding OEO and CEO Pickering emulsions, respectively. Antimicrobial results showed that E. coli was more sensitive to CEO, while S. aureus was sensitive to OEO Pickering emulsion. PVA/CEO film displayed higher properties than PVA/OEO film.
采用牛至精油（OEO）和肉桂精油（CEO）Pickering 乳液制备具有高透明度、UV 阻隔、抗氧化和抗菌性能的聚乙烯醇（PVA）薄膜。研究了 Pickering 乳液类型和浓度对 PVA 薄膜性能的影响。纤维素纳米晶体（CNC）用作天然稳定剂来制备 OEO 和 CEO Pickering 乳液。两种乳液均显示出直径为 155-291nm、zeta 电位为-36.2 至-49.6mV、最小抑制浓度为 6.25-12.5μL/mL、抑菌圈为 40-65mm 的球形液滴，这取决于油的类型。形态和 FTIR 分析表明，OEO 和 CEO Pickering 乳液与 PVA 基质具有相容性。添加 OEO 和 CEO Pickering 乳液后，PVA 薄膜的透光率从 77.3%分别下降到 30.4%和 2.0%，而不牺牲透明度。抗菌结果表明，大肠杆菌对 CEO 更敏感，而金黄色葡萄球菌对 OEO Pickering 乳液敏感。PVA/CEO 薄膜的性能高于 PVA/OEO 薄膜。
