酸交联粉/聚乙烯醇混合薄膜具有改善的屏障特性,用于包装应用
Ritesh Kumar1, Kitae Park1, Kihyeon Ahn1
1Department of Packaging, Yonsei University, 1 Yonseidae-gil, Wonju-si, Gangwon-do 26493, South Korea.
International journal of biological macromolecules
|May 19, 2024
概括
酸交叉连接增强了玉米粉/聚乙醇 (PVA) 混合膜,提高了它们的耐水性和机械性能. 这些改进的可生物降解薄膜对食品包装应用有前途.
科学领域:
- 材料科学 材料科学 材料科学
- 聚合物化学 聚合物化学
- 生物材料工程 生物材料工程
背景情况:
- 石油基聚合物带来了环境挑战,推动了对可生物降解替代品的需求.
- 将粉等天然聚合物纳入常规聚合物是很困难的,因为加工和性能限制.
- 粉/聚乙醇 (PVA) 混合物具有潜力,但需要修改以提高功能.
研究的目的:
- 为了研究酸度对玉米粉/PVA混合膜的特性的影响.
- 探索酸作为改进粉基材料的交联剂的潜力.
- 评估这些改性薄膜对于食品包装应用的适用性.
主要方法:
- 玉米粉/PVA混合膜 (50:50比) 用溶剂造用甘油作为塑化剂进行制备.
- 作为交叉连接剂,使用了不同度的雄性酸.
- 福里埃变换红外光谱学 (FTIS) 分析了分子相互作用;评估了屏障和机械性能.
主要成果:
- FTIS证实了雄性酸,粉和PVA之间的链形成.
- 增加的雄性酸度增强了膜的疏水性,减少了水的胀,改善了耐水性.
- 含有20%重量的酸的薄膜表现出优越的屏障特性 (最低O2和WVTR) 和更好的机械强度.
结论:
- 酸有效地交叉链接粉/PVA混合物,显著提高片的性能.
- 改善的屏障和机械性能使这些薄膜适合食品包装.
- 酸交联粉/PVA薄膜是传统包装材料的一个有希望的可生物降解的替代品.
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