| 초록 |
Porous graphene oxide (GO) aerogels with high porosity and low density are particularly attractive and useful for environmental purification, energy storage, etc. In this work, a small amount of synthetic dopamine-conjugated poly(aspartic acid) was mixed with GO to fabricate ultra-light graphene aerogels with low volume shrinkage via hydrothermal reactions at low temperature of 80 oC followed by freeze-drying and reduction by hydroiodic acid. Additionally, the ionic (Fe3+) coordination was chosen as the secondary cross-link to further strengthen the ultra-light graphene aerogel mechanically. Above prepared double-network (DN) aerogel exhibited excellent reversible compressibility due to the re-stacking inhibition and steric hindrance of poly(aspartic acid/dopamine) chains along with the coupling of GO networks with polymer viscoelasticity. This novel GO-based DN aerogel has great potential in applications such as energy storage and adsorption of organic pollutants. |
