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从半晶体和生物基聚胺和多乳酸制成的多层薄膜中的封闭效应

Guillaume Le Cras¹, Louise Hespel¹, Alain Guinault²

¹Univ Rouen Normandie, INSA Rouen Normandie, CNRS, Normandie Univ, PBS UMR 6270, Rouen F-76000, France.

ACS applied materials & interfaces

|August 13, 2024

概括

研究人员使用纳米层共挤出开发了新的基于生物的多层薄膜,通过限制半晶聚合物来增强屏障特性. 这一创新创造了具有优越气体和水阻力的可持续材料.

科学领域:

材料科学材料科学材料科学
聚合物科学聚合物科学
纳米技术纳米技术

背景情况:

开发高性能,环保的包装材料至关重要.
传统的多层薄膜在屏障特性和可持续性方面面临限制.
纳米层化提供了一种新的方法,可以在纳米尺度上设计材料特性.

研究的目的:

使用纳米层共挤出,创建先进的基于生物的多层膜.
研究纳米层对聚胺 (PA11) / 聚乳酸 (PLA) 薄膜的影响.
为了关联微观结构,热,机械和屏障特性.

主要方法:

使用纳米层共挤出来生产PA11/PLA薄膜,不同的层数 (3到2049).
研究了分层结构并测量了层厚度.
分析了屏障特性 (气体和水的透性),热稳定性和机械行为.

主要成果:

实现了纳米层薄膜,可调节层厚度到纳米尺度.
观察到PLA结晶度增加 (4%至16%) 和热稳定性增强.
在气体屏障特性 (例如,N2的66%BIF) 和水屏障特性 (可降低透率11倍) 中显著改进.
与微观结构重组和聚合物封闭效应相关的屏障性能.

结论:

纳米层共挤出是一种有效的方法,用于创建高屏障生物基膜.
纳米层中的封闭效应显著增强了气体和水的屏障特性.
这项研究强调了PA11/PLA纳米层薄膜作为具有卓越性能的可持续替代品的潜力.

关键词:

在PA11中,PA11是PA11.这就是为什么PLA PLA PLA.具有屏障特性,具有屏障特性.封闭效应的封闭效应多层的联合挤出.聚乳酸) 是一种乳酸.聚胺聚胺的使用方法聚酸是一种多酸.半晶体聚合物半晶体聚合物

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