Aerogels are engineering materials with ultra-low density and extremely high porosity. Herein, we report new nitrogen-rich carbon aerogels (N-CAs) prepared by direct pyrolysis of novel graphene oxide reinforced biobased chitosan-polybenzoxazine (GO-CTS-PBZ) nanocomposite aerogels. The newly developed aerogels were characterized using scanning electron microscopy (SEM), N2 sorption isotherms, and thermogravimetric analysis (TGA). Furthermore, the performance of CO2 adsorption was determined by gravimetric method at different temperatures (25, 50, and 75 oC) and pressures up to 1 atm. The newly developed N-CAs have shown an effective and stable carbon dioxide (CO2) adsorption. The effect of the molecular structure of PBZ on CO2 adsorption has been investigated. Two different types of benzoxazines, namely, main-chain benzoxazine monomer, MCBP(BA-tepa), and star-like telechelic benzoxazine, SLTB(4HBA-t403), have been used to study the effect of the benzoxazine structure on CO2 adsorption behavior. The results reveal that MCBP(BA-tepa) has larger contribution than SLTB(4HBA-t403) to increase the adsorption capacity of CO2. The N-CA that obtained by the pyrolysis of GO-CTS-MCPB(BA-tepa) shows a remarkable reversible CO2 adsorption capacity of 7.34 mmol g-1, which is one of the highest adsorption capacities in literature.Keywords:  Graphene oxide; chitosan; polybenzoxazine; aerogels, CO2 adsorption.

Graphene oxide-reinforced chitosan/polybenzoxazine-based nitrogen-rich carbon aerogels with superior CO<sub>2</sub> adsorption capacity

248th National Meeting (2014)

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Graphene oxide-reinforced chitosan/polybenzoxazine-based nitrogen-rich carbon aerogels with superior CO2 adsorption capacity

Graphene oxide-reinforced chitosan/polybenzoxazine-based nitrogen-rich carbon aerogels with superior CO₂ adsorption capacity