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聚甲基丙烯酸甲酯/埃洛石纳米复合材料的形态学及摩擦学特性

Morphological and Tribological Properties of PMMA/Halloysite Nanocomposites.

作者信息

Vuluga Zina, Corobea Mihai Cosmin, Elizetxea Cristina, Ordonez Mario, Ghiurea Marius, Raditoiu Valentin, Nicolae Cristian Andi, Florea Dorel, Iorga Michaela, Somoghi Raluca, Trica Bogdan

机构信息

National Research and Development Institute for Chemistry and Petrochemistry-ICECHIM, Bucharest 060021, Romania.

Fundacion Tecnalia Research and Innovation, Donostia-San Sebastian 20009, Spain.

出版信息

Polymers (Basel). 2018 Jul 25;10(8):816. doi: 10.3390/polym10080816.

DOI:10.3390/polym10080816
PMID:30960741
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC6403831/
Abstract

From an environmental and cost-effective perspective, a number of research challenges can be found for electronics, household, but especially in the automotive polymer parts industry. Reducing synthesis steps, parts coating and painting, or other solvent-assisted processes, have been identified as major constrains for the existing technologies. Therefore, simple polymer processing routes (mixing, extrusion, injection moulding) were used for obtaining PMMA/HNT nanocomposites. By these techniques, an automotive-grade polymethylmethacrylate (PMMA) was modified with halloysite nanotubes (HNT) and an eco-friendly additive ,'-ethylenebis(stearamide) (EBS) to improve nanomechanical properties involved in scratch resistance, mechanical properties (balance between tensile strength and impact resistance) without diminishing other properties. The relationship between morphological/structural (XRD, TEM, FTIR) and tribological (friction) properties of PMMA nanocomposites were investigated. A synergistic effect was found between HNT and EBS in the PMMA matrix. The synergy was attained by the phase distribution resulted from the selective interaction between partners and favourable processing conditions. Modification of HNT with EBS improved the dispersion of nanoparticles in the polymer matrix by increasing their interfacial compatibility through hydrogen bonding established by amide groups with aluminol groups. The increased interfacial adhesion further improved the nanocomposite scratch resistance. The PMMA/HNT-EBS nanocomposite had a lower coefficient of friction and lower scratch penetration depth than PMMA/HNT nanocomposite.

摘要

从环境和成本效益的角度来看，电子、家用产品，尤其是汽车聚合物零部件行业存在一些研究挑战。减少合成步骤、零部件涂层和喷漆或其他溶剂辅助工艺，已被确定为现有技术的主要限制因素。因此，采用简单的聚合物加工路线（混合、挤出、注塑成型）来制备聚甲基丙烯酸甲酯/埃洛石纳米管（PMMA/HNT）纳米复合材料。通过这些技术，用埃洛石纳米管（HNT）和一种环保添加剂N,N'-亚乙基双硬脂酰胺（EBS）对汽车级聚甲基丙烯酸甲酯（PMMA）进行改性，以改善与耐刮性相关的纳米力学性能、机械性能（拉伸强度和抗冲击性之间的平衡），同时不降低其他性能。研究了PMMA纳米复合材料的形态/结构（XRD、TEM、FTIR）与摩擦学（摩擦）性能之间的关系。发现HNT和EBS在PMMA基体中存在协同效应。这种协同效应是由组分之间的选择性相互作用和有利的加工条件导致的相分布实现的。用EBS对HNT进行改性，通过酰胺基团与铝醇基团形成的氢键增加了纳米颗粒与聚合物基体之间的界面相容性，从而改善了纳米颗粒在聚合物基体中的分散性。增加的界面附着力进一步提高了纳米复合材料的耐刮性。与PMMA/HNT纳米复合材料相比，PMMA/HNT-EBS纳米复合材料具有更低的摩擦系数和更低的刮擦穿透深度。

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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1e0c/6403831/3effcff0559a/polymers-10-00816-sch001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1e0c/6403831/815f7ffd3314/polymers-10-00816-sch002.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1e0c/6403831/1c58fc9e9d46/polymers-10-00816-g011.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1e0c/6403831/caf235f01931/polymers-10-00816-g012.jpg
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