Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 11, Issue 46, Pages 43533-43542Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.9b16746
Keywords
aminosilane-crosslinked rGO aerogel; superelasticity; superhydrophobicity; multifunctionality; electronic skin
Funding
- National Key Research and Development Program of China [2017YFA0204600]
- Shanghai Pujiang Program [19PJ1409900]
- Japan Society for the Promotion of Science (JSPS) KAKENHI [17K06015]
- Incubation Program of Kyoto University
- Grants-in-Aid for Scientific Research [17K06015] Funding Source: KAKEN
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Aerogels have attracted great interest for their unique properties, but their mechanical brittleness and poor functionality highly limit their practical applications. Herein, we report unprecedented superelastic multifunctional aminosilane-crosslinked reduced graphene oxide (AC-rGO) aerogels that are prepared via a facile and scalable strategy involving simultaneous crosslinking and reducing of graphene oxide nanosheets with different kinds of aminosilanes via C-N coupling and hydrolytic polycondensation reactions. It is found that 3-aminopropyl(diethoxy)methylsilane (APDEMS) is the better choice to enhance hydrophobicity, elasticity, and other properties of the resulting aerogels compared with (3-aminopropyl)triethoxysilane. One APDEMS molecule plays three roles as a crosslinker, a reductant, and a hydrophobizing agent. An outstanding combination of high surface area, ultralow density, superhydrophobicity, supercompressibility, superelasticity, low thermal conductivity, ultrahigh absorption capacity for organic liquids, efficient three-component separation, and strain/pressure sensing has been achieved in a single APDEMS-crosslinked rGO the first time. In addition, a flexible, highly sensitive, and moisture-resistant AC-rGO aerogel-based strain/pressure-sensing array for the effective detection of strain (0-80%)/pressure (10 Pa to 10 kPa) distributions and object shapes has been demonstrated.
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