Layered Silicates by Swelling of AMH-3 and Nanocomposite Membranes


  • Funding for this work was provided mainly by NSF (CTS-0327811). Additional support was provided by DOE (DE-FG26-04NT42119) and Pall Corporation. J.C. acknowledges support from the Spanish Ministry of Education (Programa de Estancias de Profesores de Universidad of the Dirección General de Universidades), S.N. from NSF (CTS-0437621), and D.F.S. from the Petroleum Research Fund of the American Chemical Society (Award 43942-AC10). We gratefully acknowledge Sandeep Kumar for the TEM images of swollen AMH-3 particles.


original image

Filling in: A new layered silicate material is prepared from a 3D porous silicate framework (AMH-3) by a novel procedure involving ion exchange and sequential intercalation. Layers of swollen AMH-3 are incorporated into a polymer, resulting in a mixed-matrix nanocomposite (see picture). The room-temperature hydrogen/carbon dioxide ideal selectivity of the swollen nanocomposite membranes is improved by a factor of two compared to the pure polymer.