Abstract
AbstractThe formation, morphology and transport properties of a new multilayer pervaporation membrane have been studied.This membrane consists of a microporous support based on a poly(amideimide), an intermediate poly[2‐(N,N‐dimethylamino)ethyl methacrylate] layer, and a top diffusion layer of ladder polysiloxane. The membrane has low permeability for weakly polar liquids (e.g. cyclohexane); it exhibits dehydrating properties for waterisopropanol mixtures and has high productivity (up to 14.5 kg h‐1 m‐2) and high separation factor (up to 27430) when methanol is isolated from mixtures with cyclohexane. The transport properties of the membrane are discussed with respect to the Henis‐Tripodi resistance model, taking into account the hydrophobic‐hydrophilic nature of the polymers used.
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