Flexible conductive adhesives with high conductivity and infrared stealth performance

IF 8.1 2区材料科学 Q1 ENGINEERING, MANUFACTURING

Composites Part A: Applied Science and Manufacturing Pub Date : 2024-10-28 DOI:10.1016/j.compositesa.2024.108559

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Abstract

While extensively employed in electronic packaging, the prevailing electrically conductive adhesives (ECAs) are currently constrained by their lack of flexibility, excessive manufacturing costs, and limited multifunctionality. In this work, the antimony-doped tin oxide flexible conductive adhesives (AFCAs) were prepared by incorporating the antimony-doped tin oxide (ATO) nanoparticles into a thermoplastic polyurethane (TPU) matrix along with silver flakes. The ATO nanoparticles acted as conductive bridges for sliver flakes to enhance the electrical conductivity and mechanical integrity of the composites. The AFCAs formulated with a mere 60 % Ag and 7 % ATO nanoparticles exhibited an exceptionally low volume resistivity of 2.01 × 10^-5 Ω·cm. After 10,000 mechanical bending cycles, the resistance change of AFCAs was only 8 %. Remarkably, the AFCA films also demonstrated excellent infrared stealth capabilities by infrared thermal imaging. This study demonstrates a facile strategy to develop high-performance and multifunctional AFCAs for flexible electrics with excellent electrical stability and infrared stealth capabilities.

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具有高导电性和红外线隐形性能的柔性导电胶

虽然导电粘合剂（ECAs）被广泛应用于电子封装领域，但目前流行的导电粘合剂（ECAs）因缺乏灵活性、制造成本过高和多功能性有限而受到限制。在这项工作中，通过将掺锑氧化锡（ATO）纳米粒子与银薄片一起加入热塑性聚氨酯（TPU）基质中，制备出了掺锑氧化锡柔性导电胶（AFCAs）。ATO 纳米颗粒是银片的导电桥梁，可增强复合材料的导电性和机械完整性。仅用 60% 的银和 7% 的 ATO 纳米颗粒配制的 AFCAs 的体积电阻率极低，仅为 2.01 × 10-5 Ω-cm。经过 10,000 次机械弯曲循环后，AFCAs 的电阻变化率仅为 8%。值得注意的是，通过红外热成像，AFCA 薄膜还表现出卓越的红外隐身能力。这项研究展示了一种简便的策略，可以为柔性电路开发出具有出色电气稳定性和红外隐形能力的高性能多功能 AFCAs。

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来源期刊

Composites Part A: Applied Science and Manufacturing 工程技术-材料科学：复合

CiteScore

15.20

自引率

5.70%

发文量

492

审稿时长

30 days

期刊介绍： Composites Part A: Applied Science and Manufacturing is a comprehensive journal that publishes original research papers, review articles, case studies, short communications, and letters covering various aspects of composite materials science and technology. This includes fibrous and particulate reinforcements in polymeric, metallic, and ceramic matrices, as well as 'natural' composites like wood and biological materials. The journal addresses topics such as properties, design, and manufacture of reinforcing fibers and particles, novel architectures and concepts, multifunctional composites, advancements in fabrication and processing, manufacturing science, process modeling, experimental mechanics, microstructural characterization, interfaces, prediction and measurement of mechanical, physical, and chemical behavior, and performance in service. Additionally, articles on economic and commercial aspects, design, and case studies are welcomed. All submissions undergo rigorous peer review to ensure they contribute significantly and innovatively, maintaining high standards for content and presentation. The editorial team aims to expedite the review process for prompt publication.