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基于聚 (乳酸) 的材料具有增强的气体透性,用于中国海的改性大气包装

Ziyi Zhou¹, Yangyang Wang², Tungalag Dong¹

¹College of Food Science and Engineering, Inner Mongolia Agricultural University, 306 Zhaowuda Road, Hohhot, Inner Mongolia 010010, China.

International journal of biological macromolecules

|January 23, 2025

概括

使用聚乙烯糖醇 (PEG) 和聚二甲基 (PDMS) 制成的新可生物降解塑料 (PLLA) 已经开发出来. 这些增强的PLLA膜提高了气体透性和选择性,非常适合保存新鲜产品.

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
食品科学食品科学食品科学

背景情况:

可生物降解的塑料,如聚L-乳酸 (PLLA) 是包装的环保替代品.
由于PLLA在气体透性和选择性方面的局限性,阻碍了其在产品保存中的使用.
加入聚乙烯甘醇 (PEG) 和聚二甲基 (PDMS) 可以增强PLLA的特性.

研究的目的:

通过结合PEG和PDMS来合成和表征基于PLLA的三环阻断共聚合物 (PL-E-LA和PL-D-LA).
优化PLLA薄膜的气体透性和选择性,以实现有效的产品包装.
评估开发的PLLA薄膜在保存中国海湾的性能.

主要方法:

通过溶液造合成PL-E-LA和PL-D-LA三块式共聚物.
使用扫描电子显微镜 (SEM) 和原子力显微镜 (AFM) 进行薄膜特性表征.
气体透率 (CO2/O2比率) 的评估和在中国海保存中应用测试.

主要成果:

在PL-E-LA和PL-D-LA膜中,破裂时延伸度增加,结晶温度降低.
SEM揭示了不同的相位分离形态 (PL-D-LA的球形,PL-E-LA的指形).
优化的混合薄膜 (PL(D25/E75) LA) 实现了9.1的CO2/O2透率,非常适合产品包装.

结论:

基于PLLA的共聚物具有量身定制的相隔,提供增强的机械和气体传输性能.
PL(D25/E75) LA膜在保持中国海品质方面表现出卓越的性能.
这些先进的可生物降解材料显示出可持续产品储存和运输包装的巨大潜力.

关键词:

它是生物降解的.气体的透性气体的透性阶段分离阶段分离阶段分离聚乳酸) 是一种聚乳酸.聚二甲基西洛二氧化.聚乙烯糖醇是一种聚乙烯糖醇.保护中国海湾的保存.

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