用于食品包装的高性能iPP基纳米复合材料

M. Avella, M. Errico, G. Gentile
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引用次数: 1

摘要

制备了新型碳酸钙纳米颗粒(CaCO3)填充的高性能iPP基纳米复合材料,并研究了结构与性能之间的关系。特别是具有高比表面积(>200 m2 /g)和细长形状的纳米颗粒作为增强纳米相。为了促进聚合物/纳米填料的相互作用,在CaCO3表面涂覆了两种不同的表面改性剂,聚丙烯-马来酸酐接枝共聚物(iPP-g-MA)或脂肪酸(FA)。形态学分析表明,与使用FA作为表面改性剂相比,iPP-g-MA的存在促进了聚合物/CaCO3之间更强的粘附。力学分析表明,杨氏模量随纳米颗粒含量和涂层剂性质的增加而增加。最后,观察到CaCO3纳米颗粒的存在大大降低了iPP对氧气和二氧化碳的渗透性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
High performance iPP based nanocomposites for food packaging application
High performance iPP based nanocomposites filled with innovative calcium carbonate nanoparticles (CaCO3) were prepared and structure-properties relationships investigated. In particular nanoparticles characterized by high specific surface area (>200 m 2 /g) and elongated shape were tested as reinforcement nanophase. In order to promote polymer/nanofillers interactions, CaCO3 were coated with two different surface modifiers, polypropylene-maleic anhydride graft copolymer (iPP-g-MA) or fatty acids (FA). Morphological analysis permitted to assess that the presence of iPP-g-MA promotes a stronger adhesion between polymer/CaCO3 with respect to that achieved by using FA as surface modifier. Mechanical analysis evidenced that Young’s modulus increases as a function of nanoparticles content and coating agent nature. Finally, it was observed that the CaCO3 nanoparticles presence drastically reduces the iPP permeability to both oxygen and carbon dioxide.
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