Temperature effect on thermal, mechanical, and electrical properties of Ag nanoparticle filled thermoplastic polyurethane composites,Polymer Composites

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Temperature effect on thermal, mechanical, and electrical properties of Ag nanoparticle filled thermoplastic polyurethane composites
Polymer Composites ( IF 4.8 ) Pub Date : 2021-08-26 , DOI: 10.1002/pc.26276
Xin‐Gang Chen ₁ , Ang Li ₁ , Yang‐Fei Zhang ₁

Affiliation

Ag nanoparticle filled thermoplastic polyurethane (AgNPs/TPU) composites are widely used in medical, energy, packaging, electronic devices, additive manufacturing and many other fields, where the service temperature fluctuates easily, making it necessary to study the temperature effect on the properties of composites. In this work, multifunctional AgNPs/TPU composites with different AgNP contents were prepared by a mixing and hot-pressing method. The results show that the phase change property of TPU is not affected by the addition of AgNPs, but the thermal diffusivity is improved. As the content of AgNPs increases, the thermal conductivities of AgNPs/TPU composites increase significantly, whereas the temperature has an opposite effect. The results of elongation at break and tensile strength show a decreased trend with the increase in the AgNP content and a trend of first increasing and then decreasing with the increase in temperature. As the temperature increases, the tensile moduli of AgNPs/TPU composites decrease significantly. For the temperature higher than 50Â°C, the electrical percolation thresholds of composites decrease from 5.5 vol% to a lower content. The results prove that the temperature has a significant influence on the thermal, mechanical, and electrical properties of AgNPs/TPU composites.

中文翻译：

温度对银纳米粒子填充热塑性聚氨酯复合材料的热、机械和电性能的影响

Ag纳米粒子填充热塑性聚氨酯（AgNPs/TPU）复合材料广泛应用于医疗、能源、包装、电子设备、增材制造等诸多领域，这些领域使用温度容易波动，因此有必要研究温度对材料性能的影响。复合材料。在这项工作中，通过混合和热压方法制备了具有不同 AgNP 含量的多功能 AgNPs/TPU 复合材料。结果表明，TPU的相变性能不受AgNPs添加的影响，但热扩散率有所提高。随着 AgNPs 含量的增加，AgNPs/TPU 复合材料的热导率显着增加，而温度具有相反的影响。断裂伸长率和拉伸强度的结果随着AgNP含量的增加呈下降趋势，随着温度的升高呈先增大后减小的趋势。随着温度升高，AgNPs/TPU 复合材料的拉伸模量显着降低。对于高于 50°C 的温度，复合材料的电渗透阈值从 5.5 vol% 降低到较低的含量。结果证明，温度对 AgNPs/TPU 复合材料的热、机械和电性能有显着影响。复合材料的电渗透阈值从 5.5 vol% 降低到较低的含量。结果证明，温度对 AgNPs/TPU 复合材料的热、机械和电性能有显着影响。复合材料的电渗透阈值从 5.5 vol% 降低到较低的含量。结果证明，温度对 AgNPs/TPU 复合材料的热、机械和电性能有显着影响。

更新日期：2021-08-26

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