Stability and water-resistance of humidity sensors using crosslinked and quaternized polyelectrolytes films

Sun, Aihua; Wang, Yongye; Li, Yong

doi:10.1016/j.snb.2010.01.024

Cited by 24 publications

(12 citation statements)

References 26 publications

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“…The MEPAB/PVPEM/MMA = 60/10/30 sensor did show a slight change with regard to its characteristics, even after soaking at 50 • C for 60 min, as shown in Fig. 11, which is comparable to the sensors with crosslinked polymers [16,20,32].…”

Section: Resultsmentioning

confidence: 55%

“…Several methods have been proposed for a problem solution, including an introduction of hydrophobic monomers by copolymerization [2][3][4][5], grafting [6,7], obtaining an interpenetration of polymer network structures [8,9], formation of organic/inorganic hybrids [10][11][12][13] and application of protective membrane [14]. Among them, a formation of crosslinking structures was proven to effectively improve their water-resistance and environmental stability [15][16][17][18]. However, the stability of these sensors is still insufficient for the use under severe conditions such as high temperature and dewy atmosphere due to the week adhesion between polyelectrolyte and electrode.…”

Section: Introductionmentioning

confidence: 99%

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Water-resistive humidity sensor prepared from new polyelectrolyte containing both photo-curable 4-styrylpyridinium function and thiol anchor

Yun

Cha

Gong

2014

Sensors and Actuators B: Chemical

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Section: Resultsmentioning

confidence: 55%

Section: Introductionmentioning

confidence: 99%

Water-resistive humidity sensor prepared from new polyelectrolyte containing both photo-curable 4-styrylpyridinium function and thiol anchor

Yun

Cha

Gong

2014

Sensors and Actuators B: Chemical

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“…Among polymeric materials, polymer electrolytes (polyelectrolytes) have been the most widely employed as resistive-type humidity sensors, owing to their ion-conducting characteristics [87,88]. They respond to humidity variations by increasing their ionic mobility or changing the charge carrier concentration [89,90].…”

Section: Characteristics and Properties Of Rh Nanostructured Polymer-mentioning

confidence: 99%

Role of nanostructured polymers on the improvement of electrical response-based relative humidity sensors

Fratoddi

Bearzotti²,

Venditti

et al. 2016

Sensors and Actuators B: Chemical

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Nanostructured polymers, with different morphologies and different spatial organizations, have found, in last few years, a wide range of uses in humidity sensors, as a viable alternative to ceramic or semiconducting materials and to oxides (perovskite) compounds. Their enhanced sensitivity towards external stimuli has made them ideal candidates in the design of humidity sensors. This is mainly due to the fact that nanostructured polymers, when embedded with different content of water, represent a heterogeneous system whose dielectric and conductometric properties varies over a wide range, resulting in advantageous sensitive material in resistive-type or capacitive-type humidity sensors. The most notable property of nanostructured polymers is their inherent electrical behavior which is closely connected to the presence of heterogeneities at a nano- or micro-scale level. In the first part of this paper, we discuss and justify, on the basis of the dielectric theory of heterogeneous systems, how the dielectric properties of nanostructured polymers, independently of their chemical nature, could vary as a consequence of a different amount of water adsorption, meeting the basic requirement of any humidity sensor device. In particular, we have analyzed systems with different porosity and different pore interconnections to cover the most part of the structural arrangements and morphologies nanostructured polymers give rise. In the second part of the paper, we present some remarkable examples of nanostructured polymers employed in the fabrication of humidity sensors based on changes in the electrical properties (permittivity and electrical conductivity) upon exposure to moisture, highlighting the main features that make them suitable for sensors, with specific emphasis to characteristic parameters, such as sensitivity, response time, hysteresis and durability

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“…With respect to the application of conductive polymers, the development of sensors has become a promising field, with increasing interest in the monitoring of climatic and environmental factors, such as humidity . It is known that humidity is a strongly influencing factor in many chemical, physical, and biological processes.…”

Section: Introductionmentioning

confidence: 99%

Development of flexible sensors using knit fabrics with conductive polyaniline coating and graphite electrodes

Oliveira

Batistella

Souza

et al. 2017

J of Applied Polymer Sci

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The aim of this study was to develop flexible sensors with cotton and polyester knit fabrics as substrates coated with polyaniline (PAni) doped with hydrochloric acid or phosphoric acid. The deposition of PAni onto the knit, polymerization synthesis, and doping of the aniline monomer were performed via an in situ reaction. Graphite dispersion was used to obtain the electrodes of the sensors, which were prepared differently for each substrate. The main evaluation of the sensors was carried out in a humidity chamber under nitrogen (N2) with the application of drying and wetting cycles. Significant differences were observed in the responses of the sensory devices to humidity, according to the dopant and substrate types. In all tests, the sensor response to variations in the ambient conditions was very good, with a rapid response to changes in the relative humidity, a good sensitivity (up to 34%), and a high reversibility (ca. 70–100%). © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017, 134, 44785.

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Stability and water-resistance of humidity sensors using crosslinked and quaternized polyelectrolytes films

Cited by 24 publications

References 26 publications

Water-resistive humidity sensor prepared from new polyelectrolyte containing both photo-curable 4-styrylpyridinium function and thiol anchor

Water-resistive humidity sensor prepared from new polyelectrolyte containing both photo-curable 4-styrylpyridinium function and thiol anchor

Role of nanostructured polymers on the improvement of electrical response-based relative humidity sensors

Development of flexible sensors using knit fabrics with conductive polyaniline coating and graphite electrodes

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