title: Encapsulation of hexahydro-1,3,5-trinitro-s-triazine (RDX) onto amino-functionalized mesoporous silica.
abstract: Amine functionalized disk type mesoporous silica was directly synthesized by co-condensation method for the encapsulation of hexahydro-1,3,5-trinitro-s-triazine (RDX), aiming for the desensitization of such high energetic material. The adsorption capacities were measured by TG analysis and pore-filling adsorption efficiencies of RDX were estimated based on sorption amounts with respect to pore volume of amino-functionalized mesoporous silica. The RDX was encapsulated as nanoparticles in the (NH2)-INC-2 due to the confinement effect within the size of mesopores and shows adsorption efficiency upto 80% at with respect to pore-filling. The confinement effect is also depicted by lowering of the T(rho) (190 degrees C) when encapsulated compared with that of free RDX. The non-neutralized amino-functionalized (cationic (NH3+)-INC-2) gave more 80% adsorption efficiency at 25% loading and the T(rho) were comparatively higher due to the ionic interaction between RDX and quaternary amine group.
authors.affiliation: Laboratory of Nano-Green Catalysis and Nano Center for Fine Chemicals Fusion Technology, Department of Chemistry, Inha University, Incheon 402-751, Korea.
authors.forename: Cheang-Rae
authors.initials: CR
authors.lastname: Lim
authors.forename: Yong-Hwan
authors.initials: YH
authors.lastname: Mo
authors.forename: Sang-Eon
authors.initials: SE
authors.lastname: Park