Adsorption-induced deformation of hierarchical organised carbon materials with ordered, non-convex mesoporosity

Adsorption-induced deformation of monolithic, hierarchically organised porous carbon materials exhibiting non-convex mesoporosity between hexagonally arranged nanorods was investigated with adsorption dilatometry and small-angle neutron scattering (SANS). n-pentane zeroscattering length density used as an adsorbate for SANS. To assess the influence micropores on deformation, three samples different degrees CO2 activation were investigated. The measured strain isotherms show distinct differences compared to from systems convex cylindrical mesopores. Strain deduced SANS exhibit regimes, which are ascribed a film phase at low-, bridged intermediate-, filled high relative pressures. Evaluating pore load moduli dilatometry, we find apparent stiffening mesoscale upon activation. We assume that stiffness linkers increases activation, whereas elastic modulus is reduced. results demonstrate adsorption-induced in these non-convex, interconnected mesopore space strongly depends structural disorder within nanorods, emphasise importance source complementary information classical analysis.