The influence of hydrostatic pressure on gas diffusion in polymer and nano-composite membranes: Application to membrane inlet mass spectrometry
Abstract(#br)A nano-composite membrane, created by coating a thin polysiloxane film to the surface of an anodic aluminum oxide (AAO) membrane, was directly coupled to the inlet system of a mass spectrometer. The gas-permeation properties of the polysiloxane nano-composite (PNC) membrane were compared to those of a conventional polydimethylsiloxane (PDMS) membrane over a range of hydrostatic pressures. Permeation of gases through the conventional PDMS membrane was reduced at high pressure by compression of the siloxane matrix.