Humidity sensing and electrical properties of a composite material of nano-sized SiO2 and poly(2-acrylamido-2-methylpropane sulfonate)

Preparation of nanostructured organic/inorganic polymer hybrids and their humidity sensing properties

“…Materials that have been studied for humidity sensing include organic polymers (Sakai et al, 1996), ceramics (Cantalini and Perlino, 1992), hybrid polymer/inorganic systems (Su and Tsai, 2004) and composites (Wu et al, 2006), have been investigated and used as humidity sensors, by detecting changes in capacitance or resistance; each of them have their own merits and specific conditions of application (Kulwicki, 1991;Yamazoe and Shimizu, 1986). The RH detection mechanism of polymers has also been based on fluorescence intensity (Zhu et al, 1989), colorimetric absorbance (Zanjanchi and Sohrabnezhad, 2005), SAW devices (Bruno et al, 2004) and optical detection (Bariain et al, 1998) by means of changes in effective refractive index (m).…”

Inkjet printing of polymeric resistance humidity sensor using UV-curable electrolyte inks

“…[1][2][3][4][5][6][7][8][9][10] Such high molecular weight polyelectrolytes, which have a high viscosity, are limited to dip-coating and screen printing methods. [11][12][13][14][15] Conventional dip-coating methods produce humidity sensor samples ±5%RH variations in the electrical characteristics, which are too large for measuring the humidity with precision under an ambient environment. 16,17 This is possibly because it is difficult to control the viscosity of high molecular weight polyelectrolytes, most of which are insoluble or are solutions that can easily cause clogging problems.…”

A facile and simple method for the preparation of copoly(TEAMPS/VP)/silver nanocomposites for the humidity-sensing membranes

“…These materials have bulk properties that can be improved over those of the base polymers. Some nanocomposite materials made of inorganic/polyelectrolytes have been tested as humidity sensors [6][7][8][9][10]. A new route for the synthesis of metallic/inorganic nanoparticles was developed with polyelectrolytes as micro/nanoreactors.…”