Shaanxi Union Research Center of University and Enterprise for Grain Processing Technologies, College of Food Science and Engineering, Northwest A&F University, Yangling 712100, Shaanxi, PR China.
Food Science School, Guangdong Pharmaceutical University, Zhongshan, Guangdong Province 528458, China.
Int J Biol Macromol. 2024 Feb;257(Pt 1):128580. doi: 10.1016/j.ijbiomac.2023.128580. Epub 2023 Dec 3.
To reduce the use of petroleum-based plastics and explore multifunctional plastics, this study was conducted to prepare ternary composite plastics by doping Pickering emulsions containing Alpinia galanga essential oil into a polymer network consisting of poly(vinyl alcohol)-acetylated pullulan polysaccharides. Scanning electron microscopy results showed that although incompatible components were present in the composite plastic, compatibility improved with the addition of pullulan polysaccharides, resulting in smooth surfaces and cross-sections, which was consistent with the observation of continuous dark zones and low relative roughness (Ra = 5.51) in Atomic force microscopy. Further, Fourier transform spectroscopy and X-ray diffraction characterization revealed that the composite plastic disrupted the molecular and crystalline structures of the pure PVA, causing the stretching vibration of -OH and the decrease of relative crystallinity. Moreover, this plastic performed optimally at a PVA to pullulan polysaccharide ratio of 75:25, exhibiting good thermal (13.12 J/g) and mechanical properties, low water absorption (70.71 %) and water vapor transmission (1.80 × 10 g/m s), as well as excellent degradability. In addition, Alpinia galanga essential oil components in the composite plastic provided favorable antioxidant scavenging of DPPH and ABTS and inhibitory effects against Escherichia coli and Staphylococcus aureus. Chicken meat packaging revealed that the plastic maintained sensory parameters such as pH and color by inhibiting the oxidation of proteins and lipids during shelf-life. The findings provide insights into developing innovative, green, multifunctional packaging and broaden the in-depth application of Alpinia galanga essential oil.
为了减少石油基塑料的使用并探索多功能塑料，本研究通过掺杂含有姜黄精油的 Pickering 乳液，将其引入由聚乙烯醇-乙酰化普鲁兰多糖组成的聚合物网络中，制备三元复合塑料。扫描电子显微镜结果表明，尽管复合塑料中存在不相容成分，但随着普鲁兰多糖的加入，相容性得到改善，导致表面和横截面光滑，与原子力显微镜中连续暗区和低相对粗糙度（Ra=5.51）的观察结果一致。此外，傅里叶变换光谱和 X 射线衍射分析表明，复合塑料破坏了纯 PVA 的分子和晶体结构，导致-OH 的伸缩振动和相对结晶度降低。此外，该塑料在 PVA 与普鲁兰多糖的比例为 75:25 时表现最佳，具有良好的热性能（13.12 J/g）和机械性能、低吸水率（70.71%）和水蒸气透过率（1.80×10 g/m s）以及出色的可降解性。此外，复合塑料中的姜黄精油成分提供了对 DPPH 和 ABTS 的良好抗氧化清除作用以及对大肠杆菌和金黄色葡萄球菌的抑制作用。鸡肉包装研究表明，该塑料通过抑制货架期内蛋白质和脂质的氧化，保持了 pH 和颜色等感官参数。这些发现为开发创新、绿色、多功能包装提供了思路，并拓宽了姜黄精油的深入应用。
