期刊
CARBON
卷 93, 期 -, 页码 659-670出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.carbon.2015.05.102
关键词
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资金
- China National Key Technology RD Program [2011BAK02B02]
- US Air Force Office of Scientific Research
- US National Science Foundation under its Scalable Nanomanufacturing program [1344654]
- China Scholarship Council (CSC7000 oversea scholarship program)
- Directorate For Engineering
- Div Of Civil, Mechanical, & Manufact Inn [1344654] Funding Source: National Science Foundation
This work reports the fabrication and characterization of three-dimensional (3D) graphene aerogel (GA)-polydimethylsiloxane (PDMS) composites (GAPC) with outstanding mechanical, electrical and thermal properties. GAPC was fabricated by impregnating 3D GA frameworks with PDMS via ice-bath-assisted infiltration and vacuum curing processes. Because of the well-interconnected 3D GA frameworks, GAPC exhibits extremely large deformability (compressive strain = 80% and tensile strain = 90%), high electrical and thermal conductivities (1 S/cm and 0.68 W/(m K), respectively), a stable piezo-resistance effect, rapid electric Joule heating performance ((dT/dt)(max) > 3 degrees C/s under a heating power of 12 W/cm(3)), and high hydrophobicity (contact angle = 135 degrees). Furthermore, GAPC exhibits a negative temperature coefficient of expansion with decreased electrical resistivity over a broad temperature range, indicating a typical semiconducting behavior and a dual two-dimensional/3D hopping conduction mechanism. (C) 2015 Elsevier Ltd. All rights reserved.
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