Abstract
In the present study, we report on the swelling properties of poly(2–hydroxyethyl methacrylate) (PHEMA) and PHEMA/carbon black (CB) nanocomposite layers, used for volatile organic compounds (VOCs) detection. In particular, by means of a simple optical method based on thin film interferometry, the swelling, is studied and measured in ethanol vapors (max 1%). The method is very sensitive and the swelling in the range of only few nanometers is measured. Interestingly we find that the nanocomposite undergoes a more pronounced swelling process with respect to the pristine polymer. Ethanol diffusion coefficient in the nanocomposite was evaluated too.KeywordsEthanol VaporFringe ShiftNanocomposite LayerWhite Light InterferometrySimulated ReflectanceThese keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.
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