Fig. 3. (a) Low magnification SEM image of composite material showing large pores created by sublimation of ice, (b) high magnification SEM image of composite wall showing distribution of CF and HSPs, (c) pore size distribution using the NLDFT adsorption branch model, cylindrical/sphere pores with nitrogen sorption on silica, and (d) nitrogen adsorption–desorption isotherm plots of the composite material.
