Architected three dimensional graphene via additive manufacturing
Disclosed here is a method for making an architected three-dimensional aerogel, comprising providing a photoresin comprising a solvent, a photoinitiator, a crosslinkable polymer precursor, and a precursor for graphene, metal oxide or metal chalcogenide; curing the photoresin using projection microstereolithography layer-by-layer to produce a wet gel having a pre-designed three dimensional structure; drying the wet gel to produce a dry gel; and pyrolyzing the dry gel to produce an architected three-dimensional aerogel. Also disclosure is a photoresin for projection microstereolithography, comprising a solvent, a photoinitiator, a crosslinkable polymer precursor, and graphene oxide.
1. A photoresin for projection micro stereolithography, comprising a solvent, a photoinitiator, a crosslinkable polymer precursor, a sol-gel catalyst, an epoxide, and graphene oxide comprising 0.1 to five weight percent of the photoresin, the photoinitiator to initiate photocuring at a wavelength of 500 nm or less, the photoinitiator having absorptivity at 405 nm, the crosslinkable polymer precursor comprising a non-aromatic polymer comprising between five weight percent and twenty weight percent of the photoresin and an aromatic polymer comprising between five weight percent and twenty percent of the photoresin, the photoresin to form a three-dimensional aerogel having a mesopore volume of at least about 0.1 cm 3 /g.
2. The photoresin of claim 1 , wherein the solvent comprises an organic solvent.
3. The photoresin of claim 1 , wherein the solvent comprises water.
4. The photoresin of claim 1 , wherein the photoinitiator is soluble in an organic solvent.
5. The photoresin of claim 1 , wherein the photoinitiator is soluble in water.
6. The photoresin of claim 1 , wherein the photoinitiator comprises lithium phenyl(2,4,6-trimethylbenzoyl)phosphinate.
7. The photoresin of claim 1 , wherein the crosslinkable polymer precursor comprise a polymerizable sol-gel reactant.
8. The photoresin of claim 1 , wherein the crosslinkable polymer precursor comprise polyethylene glycol diacrylate (PEGDA).
9. The photoresin of claim 1 , wherein the crosslinkable polymer precursor comprises polyethylene glycol diacrylate (PEGDA) and bisphenol F ethoxylate (2 EO/phenol) diacrylate (BisF).
10. The photoresin of claim 1 , wherein the crosslinkable polymer precursor comprises polyethylene glycol diacrylate (PEGDA), resorcinol and formaldehyde.
11. The photoresin of claim 1 , further comprising an acrylate.