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首页> 外文期刊>Journal of Polymers and the Environment >Enhanced Mechanical and Barrier Performance of Poly (Lactic Acid) Based Nanocomposites Using Surface Acetylated Starch Nanocrystals
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Enhanced Mechanical and Barrier Performance of Poly (Lactic Acid) Based Nanocomposites Using Surface Acetylated Starch Nanocrystals

机译：使用表面乙酰化淀粉纳米晶体增强聚（乳酸）纳米复合材料的机械和阻隔性能

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摘要

Poly (lactic) acid (PLA) based nanocomposites reinforced with starch nanocrystals (SNC) extracted from high amylopectin waxy maize starch and acetylated starch nanocrystals (Ac-SNC), were prepared and their influence on the overall properties of PLA nanocomposites were studied. The two nanofillers (SNC and Ac-SNC) were incorporated in PLA at two different loadings (1 and 3 wt%) by solvent casting and evaporation technique. Surface acetylation of SNC was confirmed by Fourier Transform infra-red spectroscopy and nuclear magnetic resonance spectroscopy and the crystalline structure by X-ray diffraction. This paper reports the influence of incorporating unacetylated and surface acetylated starch nanocrystals on morphological, barrier, mechanical, and rheological properties of PLA based nanocomposites. While both nanofillers improved the properties of PLA, the PLA-Ac-SNC had superior properties to that of PLA-SNC nanocomposites, due to better filler dispersion and interaction with the polymer matrix. These sustainable nanocomposites with improved properties will expand the application of these bio-sourced starch nanocrystals.[GRAPHICS].
机译：制备从高淀粉纳米晶淀粉和乙酰化淀粉纳米晶体（AC-SNC）中提取的淀粉纳米晶（SNC）加强的聚（乳酸）纳米复合材料，研究了对PLA纳米复合材料的整体性质的影响。通过溶剂浇铸和蒸发技术将两个纳米填料（SNC和AC-SNC）掺入PLA中（1和3wt％）。通过傅里叶变换红外光谱和核磁共振光谱和核磁共振光谱和通过X射线衍射来确认SNC的表面乙酰化。本文报道了将不乙酰化和表面乙酰化淀粉纳米晶体对PLA基纳米复合材料的形态，屏障，机械和流变性能的影响。虽然纳米填料的改善了PLA的性能，但PLA-AC-SNC由于更好的填充分散和与聚合物基质的相互作用而具有优异的PLA-SNC纳米复合材料的性质。这些可持续纳米复合材料具有改善的性质将扩大这些生物生物淀粉纳米晶体的应用。[图形]。

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