Heterogeneous membranes based on a composite of a hypercrosslinked microparticle adsorbent and polyimide binder

摘要: Abstract This paper deals with the preparation and characterization of heterogeneous membranes based on microparticle hypercrosslinked polymeric adsorbents a polyimide binder. The membrane extension is hindered by their low permeability. We enhanced permeability changed chemical structure adding new type fillers. Hypercrosslinked polystyrene microparticles diameter 1–5 μm were prepared SnCl 4 -catalyzed Friedel–Crafts reaction chloromethyl methyl ether in 1,2-dichlorethane solution. precursor polyamic acid (PAA) was synthesized equimolar amounts 4,4′-oxy(bis(phthalic anhydride)) (ODPA) bis(4,4′-oxydianiline) (ODA) or 4,4′-[(1,4-phenylene)dipropane-2,2-diyl]dianiline (BIS P) N -methylpyrrolidone (content 10 wt.%). A PAA solution adsorbent spread onto glass substrate kept at 60–240 °C for 12 h. Heterogeneous characterized thermal, mechanical separation measurements. ODPA–BIS P filled 10 wt.% 3.5 × 10 −11  cm 3 (STP) cm cm −2  s −1  cmHg nitrogen 4 × 10 −9 hydrogen. homogeneous up to one order magnitude lower. diffusion coefficient increased CH 2 . selectivity hydrogen–nitrogen amount decreased from 164 69. are intended gases organic molecules even temperature. present aims giving information influence binding materials gas properties membranes.