Mesoporous silica coated multi-wall carbon nanotubes (denoted as CNTs@MS) were prepared using sodium silicate as the silica source and gelatin as the surface-activation agent. The effects of CNTs@MS on the mechanical and thermal properties of epoxy composite are investigated in this study. The electron microscopy images and Fourier transform infrared spectra demonstrate integral coating of the mesoporous silica on the CNTs. Because of the polar silica shell, the CNTs@MS exhibited uniform dispersion in epoxy-based nanocomposite. The thermal and mechanical properties of nanocomposites were characterized using dynamic mechanical analysis (DMA), thermo-mechanical analysis (TMA) and thermal conductivity measurement. These results show that the storage modulus and thermal conductivity increased along with the amount of CNTs@MS (0.25, 0.5, 1.0 and 2.0. wt%). The coefficient of thermal expansion decreased gradually, because the dipole-dipole interactions between the silica and epoxy polymer and confinement space of the mesoporous structure reduced the thermal mobility of the epoxy polymer inside the mesopore space.
|Number of pages||7|
|Journal||Journal of the Taiwan Institute of Chemical Engineers|
|Publication status||Published - 2014 Jan 1|
All Science Journal Classification (ASJC) codes
- Chemical Engineering(all)