【摘 要】
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Three-dimensional(3D)graphene-based aerogels have significant potential for adsorption,sensors,and thermal management applications.However,their practical applications are limited by their disorganized structure and ultra-low resilience after compression.
【机 构】
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Department of Polymer Science and Engineering,Shanghai Key Lab of Electrical Insulation and Thermal
论文部分内容阅读
Three-dimensional(3D)graphene-based aerogels have significant potential for adsorption,sensors,and thermal management applications.However,their practical applications are limited by their disorganized structure and ultra-low resilience after compression.Some methods can realize a well-aligned structure,however,they involve high costs and complex technology.Herein,a 3D graphene hybrid aerogel with an anisotropic open-cell and well-oriented structure is realized by unidirectional freeze casting,which com-bines the\'soft\'(e.g.graphene oxide,Tween-80)and\'hard\'(e.g.graphene assembly)components to realize full recovery after flattening.A graphene aerogel annealed at a moderate temperature(～200℃)can pos-sess superhydrophilicity and outstanding wet-resilience properties,including after being pressed under 40 MPa.Furthermore,the graphene aerogel annealed at a high temperature of～1500℃exhibits excellent thermal conductivity enhancement efficiency in polydimethylsiloxane(PDMS).The resultant nanocom-posites clearly demonstrate anisotropic thermal conductivity and promising applications as thermal interface materials.This strategy offers new insights into the design and fabrication of 3D multifunctional graphene aerogels.
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