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.
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