Journal
CARBON
Volume 159, Issue -, Pages 166-174Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.carbon.2019.12.039
Keywords
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Funding
- National Natural Science Foundation of China [51533008, 51703194]
- National Key RAMP
- D Program of China [2016YFA0200200]
- Hundred Talents Program of Zhejiang University [188020*194231701/113]
- Key research and development plan of Zhejiang Province [2018C01049]
- Fujian Provincial Science and Technology Major Projects [2018HZ0001-2]
- Key Laboratory of Novel Adsorption and Separation Materials and Application Technology of Zhejiang Province [512301-I21502]
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Processing solvated graphene by ink printing technique holds exciting prospective in fabricating macroscopic carbonaceous materials with designed structures and outstanding properties. Direct ink writing has been utilized for highly porous graphene aerogels for multifunctional uses. However, densifled graphene solid materials have kept unreached by 3D printing for the conflict between high concentration and good homogeneousness of printing ink. Here, we have fabricated high density compact graphene microlattices (CGM) with ordered structure via liquid crystalline (LC) direct ink writing. Concentrated but homogeneous graphene oxide/glycerol inks were prepared, reaching a solid containing up to similar to 6 wt% and possessing LC nature. The flow unified LC order of inks renders highly ordered micro-structure of CGM, outstanding compressive strength (62.7 MPa at 90% strain) and high electrical conductivity of 2073 S m(-1). Our CGM also exhibit an impressive elasticity up to 15-18% strain. Our facile methodology has introduced a graphene solid architecture material with high mechanical properties and multi functionalities, which should become a useful engineered carbon scaffolds with designed multiscale structures, mechanical and functional properties. (C) 2019 Published by Elsevier Ltd.
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