Thermal, Mechanical and Electrical Properties of Ag Nanoparticle–Polymethyl Methacrylate Composites Under Different Service Temperatures

IF 3 Q2 MATERIALS SCIENCE, COMPOSITES Journal of Composites Science Pub Date : 2024-07-17 DOI:10.3390/jcs8070279

Xinghui Chen, Yangke Zhang

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Abstract

Ag-nanoparticle-reinforced polymethyl methacrylate (AgNP/PMMA) composites are widely used in healthcare, electronics, construction, transportation and many other fields. As the service temperature fluctuates easily, it is necessary to study the temperature effect on the properties of AgNP/PMMA composites. In this work, a preparation method of mixing and hot-pressing was used to fabricate multifunctional AgNP/PMMA composites that are suitable for large-scale industrial production. AgNPs are found to disperse homogeneously in the PMMA matrix. The thermal conductivity of the composite with 15 vol% AgNPs is 116.19% higher than that of PMMA and decreases as the temperature rises. Flexural strength increases first and then decreases with the rising of AgNP content and service temperature, while the flexural modulus decreases gradually. The minimum electrical resistivity of the composite achieves 1.37 × 10−3 Ω·m, with a low percolation threshold of 5 vol%, an improvement of nine orders of magnitude over PMMA. The results demonstrate that the service temperature has a significant effect on the comprehensive properties of AgNP/PMMA composites.

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银纳米粒子-甲基丙烯酸甲酯复合材料在不同使用温度下的热学、力学和电学特性

Ag-纳米粒子增强聚甲基丙烯酸甲酯（AgNP/PMMA）复合材料广泛应用于医疗保健、电子、建筑、交通等诸多领域。由于使用温度容易波动，因此有必要研究温度对 AgNP/PMMA 复合材料性能的影响。本研究采用混合和热压的制备方法制备了适合大规模工业化生产的多功能 AgNP/PMMA 复合材料。研究发现，AgNPs 可以均匀地分散在 PMMA 基体中。含 15 Vol% AgNPs 的复合材料的热导率比 PMMA 高 116.19%，并且随着温度的升高而降低。随着 AgNP 含量和使用温度的升高，弯曲强度先增大后减小，而弯曲模量则逐渐减小。复合材料的最小电阻率达到 1.37 × 10-3 Ω-m，渗流阈值低至 5 vol%，比 PMMA 提高了九个数量级。结果表明，使用温度对 AgNP/PMMA 复合材料的综合性能有显著影响。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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