Structural Investigation of Carbon-Graphene Aerogels Using Small Angle X-ray Scattering
Paper ID : 1153-ICNS
Omid Alizadeh *1, Hamidreza Madaah Hosseini2, Ali Pourjavadi3, Ahmad Reza Bahramian4
1Institute for Nanoscience and Nanotechnology, Sharif University of Technology, Tehran, Iran.
2Materials Science and Engineering Department, Sharif University of Technology, Tehran, Iran.
3Department of Chemistry, Sharif University of Technology, Tehran, 11365-9516, Iran
4Department of Polymer Engineering, Faculty of Chemical Engineering, Tarbiat Modares University, Tehran, Iran.
Carbon/graphene aerogels were synthesized by carbonization of novolac/graphene oxide aerogels. Novolac/graphene oxide aerogels were synthesized using solvent-saturated-vapor-atmosphere technique. To this aim, 20 wt.% solution of novolac resin with 0, 2, and 5 wt.% graphene oxide in 2-propanol were made and were cured in an autoclave at 120oC and pressure of 15 bar in the presence of excess 2-propanol. Wet aerogels were dried in air and were carbonized at 800 oC in nitrogen atmosphere. Field emission scanning electron microscopy and small angle X-ray scattering measurements were used to characterize the samples. GO nanosheets decrease the size of the polymeric beads. Graphene oxide nanosheets and their functional groups act as nucleation sites and facilitate the formation of nucleus. Formation of more nuclei results in more and smaller polymeric beads. According to SAXS results the presence of graphene in aerogel structure results in increasing the total porosity and also decrease the average pore diameter and narrows the pore size distribution.
Graphene oxide, Carbon aerogel, X-ray scattering, Quasi-Percolation Model.
Status : Abstract Accepted (Poster Presentation)