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Zhang, Qiangqiang; Xu, Xiang; Li, Hui; Xiong, Guoping; Hu, Han; Fisher, Timothy S.
Carbon (New York), 11/2015, Letnik: 93Journal Article
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 (1S/cm and 0.68W/(mK), respectively), a stable piezo-resistance effect, rapid electric Joule heating performance ((dT/dt)max>3°C/s under a heating power of 12W/cm3), and high hydrophobicity (contact angle=135°). 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.
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Leto | Faktor vpliva | Izdaja | Kategorija | Razvrstitev | ||||
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JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
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in: SICRIS
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