Gas transport properties of polyimide–POSS nanocomposites

摘要: Abstract A mixed matrix membrane material was formed by mixing molecular scale inorganic cages, octaamino functional oligomeric silsesquioxane (OAPS) in a fluorine containing polyimide, 6FDA–MDA. These materials miscible blend at loadings up to 20 wt% OAPS with phase separation occurring the formation of small nanoscale particles higher (∼50 wt%). The pure gas transport properties were measured as function loading. There general decrease permeabilities for all gases studied except carbon dioxide increasing This reduction due decreases both solubility and diffusivity which indicate that cages not accessible molecules conditions used study. amino groups on surface interact CO 2 resulting slight increase no net permeability loadings. An permselectivities observed most pairs including He/CH 4 , /CH O /N .