Thermally Conductive and Stretchable Elastomers Engineered via Ordered Hydrogen Bonding Interactions

Abstract

Elastomers are widely used for their large‐strain reversible stretchability, but their low thermal conductivity limits their applications in thermal management. Increasing the thermal conductivity of elastomers usually involves adding fillers, which deteriorate their stretchability and other desirable properties. Here, a supramolecular structure design strategy is proposed to enhance the thermal conductivity of amorphous elastomers without compromising their stretchability and self‐healing abilities. Supramolecular poly(thioctic acid‐N,N′‐methylenebis acrylamide) elastomers are designed with ordered hydrogen bonding interactions that improve the heat transfer efficiency and maintain excellent stretchability. The resulting elastomers exhibit a thermal conductivity of 0.72 W m−1 K−1, a remarkable stretchability of 427%, a low elastic modulus of 475 kPa, and self‐healing and reprocessing capabilities. This strategy offers a promising alternative for developing thermally conductive elastomers that do not rely on traditional fillers.

Ultrahigh Thermal Conductivity of Epoxy/Ag Flakes/MXene@Ag Composites Achieved by In Situ Sintering of Silver Nanoparticles

“…The accumulation of heat in electronic circuits can adversely affect device performance and reduce their lifespan . To address this problem, thermal management technologies have been developed for use in applications like supercomputing and electric vehicles to enhance device performance and longevity. − Within this context, TIMs play a crucial role in extending device lifespan. TIMs are a key component of effective thermal management, designed to transmit heat from circuits to the surrounding environment by filling the unavoidable air gaps between heat-generating devices and their radiator contact surfaces. − TIMs come in different forms, including thermal pads, thermal greases, thermal gels, and TCAs, depending on their encapsulation state and application method. ,, Compared to other TIMs, TCAs are more suitable for thermal management due to their versatility. − Typically, TCAs are created by mixing thermal fillers with a polymer matrix.…”