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Capillary shrinkage of graphene oxide hydrogels
- Source :
- Science China Materials. 63:1870-1877
- Publication Year :
- 2019
- Publisher :
- Springer Science and Business Media LLC, 2019.
-
Abstract
- Conventional carbon materials cannot combine high density and high porosity, which are required in many applications, typically for energy storage under a limited space. A novel highly dense yet porous carbon has previously been produced from a three-dimensional (3D) reduced graphene oxide (r-GO) hydrogel by evaporation-induced drying. Here the mechanism of such a network shrinkage in r-GO hydrogel is specifically illustrated by the use of water and 1,4-dioxane, which have a sole difference in surface tension. As a result, the surface tension of the evaporating solvent determines the capillary forces in the nanochannels, which causes shrinkage of the r-GO network. More promisingly, the selection of a solvent with a known surface tension can precisely tune the microstructure associated with the density and porosity of the resulting porous carbon, rendering the porous carbon materials great potential in practical devices with high volumetric performance.
- Subjects :
- Materials science
Capillary action
Graphene
Oxide
chemistry.chemical_element
02 engineering and technology
010402 general chemistry
021001 nanoscience & nanotechnology
01 natural sciences
0104 chemical sciences
law.invention
Surface tension
chemistry.chemical_compound
chemistry
law
Self-healing hydrogels
General Materials Science
Composite material
0210 nano-technology
Porosity
Carbon
Shrinkage
Subjects
Details
- ISSN :
- 21994501 and 20958226
- Volume :
- 63
- Database :
- OpenAIRE
- Journal :
- Science China Materials
- Accession number :
- edsair.doi...........188abf87fca7f667fe00c1664e076721