Novel gas sensor from polymer-grafted carbon black: Vapor response of electric resistance of conducting composites prepared from poly(ethylene-block-ethylene oxide)-grafted carbon black

Chen, Jinhua; Tsubokawa, Norio

doi:10.1002/1097-4628(20000912)77:11<2437::aid-app12>3.0.co;2-f

Cited by 80 publications

(14 citation statements)

References 38 publications

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“…The details of the preparation for the sensor materials, measurements of electric resistance and response analysis are described in our previous papers. [4][5][6][7][8] …”

Section: Sensor Materialsmentioning

confidence: 99%

“…[4][5][6][7][8] Therefore, the radiation grafting onto carbon black is very effective to achieve the effective grafting onto carbon black having few functional groups, such as conductive carbon black.…”

Section: Irradiation Grafting Of Pe Onto Carbon Black Surfacementioning

confidence: 99%

“…als for a novel gas sensor. [4][5][6][7][8] In general, the conductive carbon black has no functional groups as grafting sites of a polymer. In previous studies, the grafting of PE onto conductive carbon black was achieved by the reaction of low molecular weight oxidized PE having hydroxyl groups with carboxyl groups on carbon black, which were previously introduced by the radical trapping method.…”

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confidence: 99%

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Radiation Grafting of Polyethylene onto Conductive Carbon Black and Application as a Novel Gas Sensor

Chen

Maekawa²,

Yoshida³

et al. 2002

Polym J

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ABSTRACT:Radiation grafting of polyethylene (PE) onto carbon black was carried out by γ-ray irradiation of PEadsorbed carbon black. The percentage of PE grafting and decomposition temperature of PE grafted onto the surface were determined by thermogravimetric analysis. At low irradiation temperature, the percentage of grafting was very small in spite of higher irradiation dose. On the contrary, at high temperatures near or above the melting point of PE, the grafting of PE onto the carbon black surface proceeded and the percentage of grafting exceeded 90% when the irradiation dose reached to 200 kGy. The results indicate that the adsorbed PE was completely grafted onto the carbon black surface. The decomposition temperature of the grafted PE on the surface was higher than both free (unadsorbed) PE and adsorbed PE on the carbon black surface, indicating that there is a covalent bond between the carbon black and PE molecule. Using the PE-grafted carbon black and PE, conductive PE/PE-grafted carbon black composite was prepared. Electric resistance suddenly increased in cyclohexane vapor over 10 4 times, and returned to initial resistance when transferred to air, indicating that the composite can be used as a novel gas sensor.

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“…The details of the preparation for the sensor materials, measurements of electric resistance and response analysis are described in our previous papers. [4][5][6][7][8] …”

Section: Sensor Materialsmentioning

confidence: 99%

Section: Irradiation Grafting Of Pe Onto Carbon Black Surfacementioning

confidence: 99%

mentioning

confidence: 99%

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Radiation Grafting of Polyethylene onto Conductive Carbon Black and Application as a Novel Gas Sensor

Chen

Maekawa²,

Yoshida³

et al. 2002

Polym J

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“…In general, some electrical conductive materials, such as carbon black and graphite, have been used as probes in polymer composites to measure the electrical resistance response of sensors to various solvent vapors [3,[7][8][9]13]. Different response mechanisms have been described for carbon black (or graphite)/polymer composites.…”

Section: Introductionmentioning

confidence: 99%

“…When the sensor was exposed to a solvent vapor, swelling of the polymer matrix decreases the electrical connectivity between the conductive particles within the composite, and cause an increase in electrical resistance [18,19]. For crystalline polymers, it was also considered that the polymer matrix within the composite is dissolved by solvent absorption, and the movement of carbon black particles in the amorphous regions causes the destruction of conductive networks, which results in the increase in electrical resistance consequently [13,14]. In some cases, the decreasing of resistance has been observed for polar solvent vapors due to the increasing the mobility of polar analytes, ionizable hydrophilic functional groups and/or doped ions in the sensing material if the hydrophilic polymers, polyelectrolytes and ion doped conductive polymers are used as sensing element [15][16][17][18].…”

Section: Introductionmentioning

confidence: 99%

A STUDY on the sensitivity and selectivity properties of Polymer based gas-vapor sensors

Cankurtaran

Yazıcı

Karaman³

2016

J. Turk. Chem. Soc., Sect. A: Chem.

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Abstract:In this study, the water soluble poly (diphenylaminesulfonic acid) (PSDA) and the diblock copolymer of PSDA with poly(ethylene glycol) (PEG) were used to construct the interdigitated film electrodes (IDEs). Their responses against humidity and various solvent vapors were investigated by impedance measurements. Sorption and desorption behaviors of the solvents were determined by simultaneous registration of the impedance (Z) and the resistive (R, resistance) and capacitive (X, reactance) components of the Z under different potential bias and alternating current (ac) frequencies. The sensor responses were discussed considering the polar/non-polar and polarizability properties of the polymers and solvents. The effect of ac frequency and potential bias on the sensitivity and selectivity of the sensors were discussed. It was found that the solvent polarity is the primary effect on the electrical conductance and capacitance of both PSDA homopolymer and PSDA-b-PEG block copolymer. The results supported that the dipolarity-polarizability properties of solvents have also a critical role on sensor response at low ac frequencies. The more polarizable solvents gave higher sensor responses at lower ac frequencies. The equilibrium response of the PSDA based sensor was correlated with the dielectric constant of the solvents. The values of Z and R of PSDA film under saturated solvent vapors at 1 kHz ac frequency were linearly correlated (R 2 was 0.955, 0.993 and 0.957 for Z, R and X, respectively, in semi-logarithmic scale) with the values of the dielectric constants of the solvents, except water. A similar correlation (R 2 = 0.996) was obtained by using the R values of the PSDA film at 100 kHz ac frequency. In the case of PSDA-b-PEG polymer film, it was also possible to establish an almost linear correlation (R 2 =0.943) between the R at 100 kHz ac frequency and the values of the dielectric constants of the solvents, except acetone and water. Consequently, it was found that the applied ac frequency was distinctive on both the sensitivity and selectivity of the studied sensor.

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Electrical resistance response of poly(ethylene oxide)‐based conductive composites to organic vapors: Effect of filler content, vapor species, and temperature

Jian

Cheng

Zhang³

et al. 2005

J of Applied Polymer Sci

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ABSTRACT:In this work conductive composites consisting of carbon black (CB) and poly(ethylene oxide) were prepared by solution mixing. The composites' resistance drastically changes in organic vapors so that the composites can be used as candidates for gas-sensing materials. Owing to the different conduction mechanisms and solvent/composites interactions, the electrical response behaviors of the composites exhibit specific dependences on CB content and environmental temperature, which were only reported previously in a few instances. In addition, the rate of response was also correlated with solvent polarity, solubility, etc. The findings would help to understand the micromechanism of response of the composites and to improve the sensing performance as well.

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Novel gas sensor from polymer-grafted carbon black: Vapor response of electric resistance of conducting composites prepared from poly(ethylene-block-ethylene oxide)-grafted carbon black

Cited by 80 publications

References 38 publications

Radiation Grafting of Polyethylene onto Conductive Carbon Black and Application as a Novel Gas Sensor

Radiation Grafting of Polyethylene onto Conductive Carbon Black and Application as a Novel Gas Sensor

A STUDY on the sensitivity and selectivity properties of Polymer based gas-vapor sensors

Electrical resistance response of poly(ethylene oxide)‐based conductive composites to organic vapors: Effect of filler content, vapor species, and temperature

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