A new approach to attaining time invariant diffusional flux through bilayered membranes with reversible barriers has been demonstrated. The barrier has been formed by exploiting the phenomenon of volume transition in polymers. The novelty of the approach is that such bilayers can be formed in situ. A theoretical analysis shows how the desired diffusional behaviour can be achieved. The validity of the concept, as well as the quantitative predictability of the theoretical analysis, is demonstrated by experimentation on model systems. A potential application is highlighted.
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Kulkarni et al. (1992) studied this question.
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