| Plasma polymer films have been prepared and characterized for two separate applications: (1) Cobalt (II) meso-tetraphenylporphyrin (CoTPP)-containing trans-2-butene, (T2B) plasma polymers for potential use as fixed site facilitated transport membranes for separation of oxygen and nitrogen, and (2) Beryllium-containing T2B plasma, polymers for potential use as coatings on inertial confinement fusion (ICF) targets that are to be diffusion-filled with deuterium-tritium fuel.; A membrane formed by incorporating CoTPP into a T2B plasma polymer matrix exhibited pressure dependent permeability behavior typical of fixed site facilitated transport. This behavior is adequately described by a dual mode sorption model proposed by Fredrickson and Helfand. This model incorporates four diffusion coefficients describing transport behavior in membranes exhibiting both Langmuir and Henry mode diffusion as well as transport between the two modes. Preparation of the films and application of the Fredrickson and Helfand model to the pressure dependent permeability behavior are described.; Beryllium-containing plasma polymer films were prepared by evaporating beryllium (Be) into a T2B plasma. The Be content in these films varied from zero to one hundred weight percent (pure evaporated Be). Multi-layered films of evaporated Be and T2B plasma polymer were also deposited using the same reactor configuration. Permeability to hydrogen in 1 mum thick films was 1.36 barrers and 0.13 barrers, respectively, at 55°C which would allow diffusion filling with deuterium-tritium fuel of ICF targets coated with these materials. However, oxygen contents greater than 26.5 weight percent for each of these films rendered them unusable as coatings for ICF targets. |
