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Thin film composite membranes were prepared by coating porous polysulfone membranes with a polyvinyl alcohol layer and further cross-linking its surface. The thin layer of crciss-linked polyvinyl alcohol served as a selective membrane. The membranes were prepared under various conditions and tested for sodium chloride separation. A high sodium chloride separation was achieved but the permeation rate was low compared with commercially available thin film composite membranes. Resistance against the flow of solvent water and sodium chloride solute were determined for individual component barrier layers.On a prtpart des membranes composites h film mince en recouvrant des membranes de polysulfone poreuses d'une couche d'alcool ployvinylique ayant subi une dticulation de surface. L a couche fine d'alcool polyvinylique ainsi prtparck sert de membrane stlective. Les membranes ont t t t prtpartes dans des conditions variks et testks pour la stparation du chlore de sodium. On a obtenu une separation 6levck du chlore de sodium mais la vitesse de permhtion est faible si on fait des comparaisons avec les membranes de composites h film mince disponibles sur le marcht. Les rtsistances h I'koulement d'eau (solvant) et du chlorure de sodium (:;olutt) ont t t t dtterminks pour des couches barritres de composants individuels.

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The MINOS experiment is a long-baseline, neutrinooscillation experiment. In total, 28,000 m 2 of scintillator is needed for the experiment. This is almost 300 tons of finished scintillator. The solution has been the development of an extruded scintillator with a 2-mm deep grove in the upper surface for a wavelength-shifting fiber and a co-extruded TiO 2 coating as a reflector. The TiO 2 coating also allows the scintillator to be directly epoxied into panels. Production and quality control techniques are presented.

No abstract