High-Performance Liquid Metal/Polyborosiloxane Elastomer toward Thermally Conductive Applications.
High-Performance Liquid Metal/Polyborosiloxane Elastomer toward Thermally Conductive Applications.
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DOI：
10.1021/acsami.2c04994
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发表时间：
2022-04
影响因子：
9.5
通讯作者：
Chunyu Zhao;Yu Wang;Liang Gao;Yunqi Xu;Ziyang Fan;Xujing Liu;Y. Ni;Shouhu Xuan;Huaxia Deng-Huaxi
中科院分区：
文献类型：
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作者：
Chunyu Zhao;Yu Wang;Liang Gao;Yunqi Xu;Ziyang Fan;Xujing Liu;Y. Ni;Shouhu Xuan;Huaxia Deng-Huaxi
导热弹性体兼具高柔韧性和热性能，在日常生活中发挥着重要作用。然而，传统的导热弹性体表现出有限的拉伸性和韧性，严重限制了其在实际应用中的进一步发展。本文中，通过将室温液态金属微滴（LM）分散到聚硼硅氧烷弹性体（PBSE）中来制造高性能复合材料。由于独特的固-液耦合机制，LM可以与PBSE基体一起变形，获得更高的断裂应变（401%）和断裂韧性（2164 J/m2）。同时，LM微滴的存在提高了复合材料的导热性能。有趣的是，LM/PBSE在复杂的载荷环境下也表现出显着的抗冲击，粘附能力。LM/PBSE作为一种新型的可拉伸弹性体，具有良好的力学性能和热性能，在热膨胀材料、可拉伸散热基体和多功能电子器件外壳等领域显示出良好的应用前景。
With the combination of high flexibility and thermal property, thermally conductive elastomers have played an important role in daily life. However, traditional thermally conductive elastomers display limited stretchability and toughness, seriously restricting their further development in practical applications. Herein, a high-performance composite is fabricated by dispersing room-temperature liquid metal microdroplets (LM) into a polyborosiloxane elastomer (PBSE). Due to the unique solid-liquid coupling mechanism, the LM can deform with the PBSE matrix, achieving higher fracture strain (401%) and fracture toughness (2164 J/m2). Meanwhile, the existence of LM microdroplets improves the thermal conductivity of the composite. Interestingly, the LM/PBSE also exhibits remarkable anti-impact, adhesion capacities under complex loading environments. As a novel stretchable elastomer with enhanced mechanical and thermal behavior, the LM/PBSE shows good application prospects in the fields of thermal camouflages, stretchable heat-dissipation matrixes, and multifunctional shells for electronic devices.