Poly(ethyleneglycol)s (PEG)-based crosslinked resins were tested as hydrophilic coatings for relative humidity (RH) sensors. A quartz crystal microbalance was used to evaluate the water sorption capability of coatings obtained by depositing aqueous dispersions of the preformed resins in a micronized form. Resins at various degrees of crosslinking, and therefore of swelling ratios in water, were used. The polymeric materials were characterized by IR, DSC and SEM analysis, and in the case of the starting PEGs by NMR spectrometry. They were tested as moisture-sorbing coatings in the form of thin layers (average surface density <100 μg/cm2). Sorption experiments were performed under controlled atmospheric conditions at three different temperatures and at various RH levels. A fast (<10s) and reversible sorption behaviour was observed.
POLY(ETHYLENEGLYCOL)S-BASED HYDROGELS AS COATINGS FOR RELATIVE-HUMIDITY SENSORS / E. RANUCCI, Opelli, P., Ferruti, P., Ferrrari, V., Taroni, A., Marioli, D.. - In: POLYMER GELS AND NETWORKS. - ISSN 0966-7822. - 2:2(1994), pp. 119-133. [10.1016/0966-7822(94)90031-0]
POLY(ETHYLENEGLYCOL)S-BASED HYDROGELS AS COATINGS FOR RELATIVE-HUMIDITY SENSORS
E. RanucciPrimo
;
1994
Abstract
Poly(ethyleneglycol)s (PEG)-based crosslinked resins were tested as hydrophilic coatings for relative humidity (RH) sensors. A quartz crystal microbalance was used to evaluate the water sorption capability of coatings obtained by depositing aqueous dispersions of the preformed resins in a micronized form. Resins at various degrees of crosslinking, and therefore of swelling ratios in water, were used. The polymeric materials were characterized by IR, DSC and SEM analysis, and in the case of the starting PEGs by NMR spectrometry. They were tested as moisture-sorbing coatings in the form of thin layers (average surface density <100 μg/cm2). Sorption experiments were performed under controlled atmospheric conditions at three different temperatures and at various RH levels. A fast (<10s) and reversible sorption behaviour was observed.
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