Gas sensitivity of carbon black/waterborne polyurethane composites

Chen, Shiguo; Jian, Hu; Zhang, Ming Qiu; Li, Ming Wei; Rong, Min Zhi

doi:10.1016/j.carbon.2004.01.002

Cited by 98 publications

(49 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…(Jeong et al, 2009;Al-saleh et al, 2009;Fosbury et al, 2003;Krupa et al, 2007). It is also possible that composites made of conductive fillers embedded in insulator host matrix undergo a transition from insulating to conductive regime by varying some chemical or physical parameters; like temperature changes, applied pressure, gas absorption, current or magnetic field (Heaney, 1996;Beruto et al, 2005;Chen et al, 2004;Bendark, 2002). Among the various composites, metal-polymer composites have attracted great interest.…”

Section: Introductionmentioning

confidence: 99%

Piezoresistivity and Mechanical Behavior of Metal-polymer Composites under Uniaxial Pressure

Abyaneh¹,

Ekar²,

Kulkarni³

2012

JMSR

View full text Add to dashboard Cite

The piezoresistive response of copper and nickel particles reinforced polydimethylsiloxane (PDMS) polymer, forming metal-polymer composites were investigated under uniaxial pressure. Electrical and mechanical properties of composite samples containing Cu and Ni conductive fillers at different loadings in polydimethylsiloxane (PDMS) polymer matrix have been presented here. Well-dispersed metal-polymer composites were fabricated by a wet mixing route. The resulting Cu-PDMS and Ni-PDMS composite samples show the resistivity changes by more than 2 and 10 orders of magnitude around 4MPa pressure, respectively. The mechanical tests have shown that these composite samples have high stress sensitivity which makes them good piezoresistive candidates for practical applications.

show abstract

Section: Introductionmentioning

confidence: 99%

Piezoresistivity and Mechanical Behavior of Metal-polymer Composites under Uniaxial Pressure

Abyaneh¹,

Ekar²,

Kulkarni³

2012

JMSR

View full text Add to dashboard Cite

show abstract

“…For CPCs with a certain filler loading, any parameter that can alter the interparticle distance will affect the conductivity. Several groups have investigated the change of conductivity of CPCs as a function of temperature [3,4], solvent vapors [5][6][7][8][9], pressure [10] or mechanical stretching [11][12][13][14][15][16][17][18][19][20][21]. Such materials have the potential to become a new generation of sensors if the dependence is reversible.…”

Section: Introductionmentioning

confidence: 99%

Piezoresistive polymer composites based on EPDM and MWNTs for strain sensing applications

Ciselli

Busfield

et al. 2010

E-Polymers

View full text Add to dashboard Cite

Abstract:Elastomeric composites based on Ethylene-Propylene-Diene-Monomer (EPDM) filled with multi-wall carbon nanotubes (MWNTs) have been prepared, showing improved mechanical properties as compared to the pure EPDM matrix. The results have been discussed using the Guth model. The main focus of the study was on the electrical behavior of these conductive polymer composites (CPCs), in view of possible sensor applications. A linear relation has been found between conductivity and deformations up to 10% strain, which means that such materials could be used for applications such as strain or pressure sensors. Cyclic experiments were conducted to establish whether the linear relation was reversible, which is an important requirement for sensor materials.

show abstract

“…Some of the polymer matrix/conductive particles composites exhibited a remarkable sensitivity to organic vapors similar to the PTC effect, which is known as the negative vapor coefficient (NVC) effect (Chen et al 2000(Chen et al , 2004. In our previous work, polystyrene/CB composites prepared by in-situ polymerization showed high sensitivity to some organic vapors with weak polarity, such as tetrahydrofuran, cyclohexane, chloroform, and acetone.…”

Section: Introductionmentioning

confidence: 97%

Conducting Graphite/Cellulose Composite Film as a Candidate for Chemical Vapor-Sensing Material

Liu

Qian

et al. 2014

BioResources

View full text Add to dashboard Cite

A type of conductive graphite/cellulose composite film used for chemical vapor-sensing material was prepared at room temperature in the ionic liquid 1-butyl-3-methylimidazolium chloride ([BMIm]Cl). Graphite was pretreated with both oxidation and reduction processes. Due to the use of N,N-carbonyldiimidazole (CDI), as a covalent cross-linking agent in [BMIm]Cl, there were limited chemical bonds between the graphite and cellulose. The composite film was analyzed using Fourier transform infrared spectroscopy (FT-IR), Raman spectroscopy, and X-ray photoelectron spectroscopy (XRD). When these conducting films were exposed to certain organic vapors, their electrical resistances quickly changed, showing gas sensitivity. The percolation threshold of the conducting film was about 5 wt%. The gas-sensing behavior of these films in solvent were the opposite of those gas-sensing materials based on a non-polar polymer matrix. A typical negative vapor coefficient (NVC) was observed when the film was placed in polar organic solvents such as methanol, ethanol, and acetone.

show abstract

Gas sensitivity of carbon black/waterborne polyurethane composites

Cited by 98 publications

References 21 publications

Piezoresistivity and Mechanical Behavior of Metal-polymer Composites under Uniaxial Pressure

Piezoresistivity and Mechanical Behavior of Metal-polymer Composites under Uniaxial Pressure

Piezoresistive polymer composites based on EPDM and MWNTs for strain sensing applications

Conducting Graphite/Cellulose Composite Film as a Candidate for Chemical Vapor-Sensing Material

Contact Info

Product

Resources

About