Resistance-pressure sensitivity and a mechanism study of multiwall carbon nanotube networks/poly(dimethylsiloxane) composites

Hu, Changyi; Liu, C. H.; Chen, L. Z.; Peng, Ya; Fan, Shoushan

doi:10.1063/1.2961028

Cited by 69 publications

(52 citation statements)

References 20 publications

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“…Similarly, nanocomposites based on elastomeric materials like silicone [19][20][21][22] and natural rubber [23] filled with carbon nanoparticles have been investigated for compressive piezoresistance, primarily for pressure sensing applications (e.g., tactile sensors, pressure mapping).…”

Section: Introductionmentioning

confidence: 99%

Effect of carbon nanoparticle type, content, and stress on piezoresistive polyethylene nanocomposites

Rizvi

Naguib

2014

Polymer Engineering & Sci

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This study examines the piezoresistive behavior of polyethylene (PE) composites containing different types of carbon nanoparticle fillers. The fillers investigated are single-wall carbon nanotube (SWCNT), multi-wall carbon nanotube (MWCNT), and graphene nanoplatelets (GNP), which were dispersed in PE through melt blending in concentrations ranging between 0.5 and 10 wt%. The dispersion and nanocomposite morphology were investigated using scanning electron microscopy and X-ray diffraction with strong evidence found for shear-induced orientation of GNP nanoparticles during the compression molding process. The conductivity and permittivity of the composite materials was investigated using impedance spectroscopy and the lowest percolation threshold and highest electrical conductivity was observed for SWCNT composites, followed by MWCNT and GNP. The compressive piezoresistance of the nanocomposites was measured and the initial, elastic, and plastic deformation regions were all identifiable by the resistance measurements. The main finding of this study is that the piezoresistance of MWCNT nanocomposites is more sensitive to the effects of varying stress and composition than SWCNT nanocomposites. This indicates an evolving filler network in the case for MWCNT, while a static network for SWCNT, which is explained by the higher aspect ratio and surface area of the latter. POLYM. ENG.

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Section: Introductionmentioning

confidence: 99%

Effect of carbon nanoparticle type, content, and stress on piezoresistive polyethylene nanocomposites

Rizvi

Naguib

2014

Polymer Engineering & Sci

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“…This traditional process has been well used to fix the CNTs [2,7]. The main methods of traditional process to disperse CNTs throughout polymer matrix are ultrasonic and stir [4,6]. Because the CNTs flocculate due to van der Waals interactions between CNTs, it is difficult to uniformly disperse CNTs throughout polymer matrix.…”

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confidence: 99%

“…For carbon nanotubes network (NTN), the effects due to such individual variations are suppressed by the ensemble averaging over a large number of tubes. The NTN devices can be mass produced reproducibly and efficiently make CNTs ideal for application [2][3][4][5][6][7].…”

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confidence: 99%

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Improved electrical resistance-pressure strain sensitivity of carbon nanotube network/polydimethylsiloxane composite using filtration and transfer process

et al. 2010

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The electrical resistance-pressure strain sensitivity of carbon nanotube network (NTN)/polymer composite is investigated. In this research, polydimethylsiloxane (PDMS) is used as the polymer matrix. The composite of NTN embedded in PDMS matrix has been fabricated by using filtration and transfer process. The thickness of NTN/PDMS composite can be controlled. Electrical resistance and pressure strain of the NTN/PDMS composite are measured simultaneously. Electrical resistance of NTN/PDMS composite has been obtained as a function of pressure strain. The NTN/PDMS composite exhibits linear change in electrical resistance as a result of pressure strain and has improved electrical resistance-pressure strain sensitivity. The NTN/PDMS composite has 90.6% resistance change at 6% pressure strain. The electrical resistance-pressure strain sensitivity of NTN/PDMS composite using filtration and transfer process is 2.13 times of the traditional NTN/PDMS composite. The characteristic in electrical resistance change implies that NTN/PDMS composite can be used as pressure strain sensors and applied to sensor systems. carbon nanotubes, electrical resistance-pressure strain sensitivity, vacuum filtration, transfer process Citation:Lü Q, Cao H, Song X H, et al. Improved electrical resistance-pressure strain sensitivity of carbon nanotube network/polydimethylsiloxane composite using filtration and transfer process.

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“…A variety of conductive nanoscale fillers have been used in polymer matrices to create polymer nanocomposites, including carbon nanotubes (CNTs) (as reviewed in Ref. [16]) [7,9,17,18], carbon black (CB) [8,12,19], graphene (as reviewed in Refs. [20,21]), short carbon fiber [19], graphite [11], and exfoliated graphite (EG) [10,22,23].…”

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Thermal imaging using polymer nanocomposite temperature sensors

Sauerbrunn

Chen

Didion

et al. 2015

Physica Status Solidi (a)

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Sensing temperature distributions over an area is of interest for many applications, and it is currently performed using sensors that are attached to the structure. In this work a conductive "smart paint", made from latex and exfoliated graphite, is introduced for temperature sensing. This provides, as an alternative to manual fixation, the ability to integrate sensors during fabrication because the approach is amenable to additive manufacturing technologies such as 3D printing. We demonstrate that calibration of the spray-coatable polymer/carbon composite thin film sensors allows accurate temperature measurement over an area. We further demonstrate continuous, distributed temperature sensing by employing electrical impedance tomography to reconstruct a thermal image from measurements at the perimeter of the sensing region. 1 Introduction Sensing temperature distributions over an area is of interest for applications ranging from environmental awareness in advanced robots to thermal management systems in satellites. This is currently achieved by arrangements of numerous single-point sensors, typically thermocouples, thermistors, and resistive temperature devices (RTDs). A high density of point sensors is required to measure steep temperature gradients that would otherwise put the system at risk of overheating. To form a more complete thermal image, arrays of sensors fabricated onto one substrate can be attached as a unit. Some distributed temperature measurement methods have been studied, including distributed fiber optic temperature sensors [1] and solar cells acting as capacitive temperature sensors [2].In this work we demonstrate that a grid of compliant polymer/carbon composite thin film sensors accurately measures temperature over an area, which can be converted into a thermal image of the surface. We further demonstrate continuously distributed temperature sensing using the functional paint over an area, applying electrical impedance tomography to reconstruct the temperature profile.Approaches that integrate the fabrication of thermal sensors into additive manufacturing provide a clear advantage over manual fixation and wiring. Because of the increasing use of 3D printing of polymeric structures (including even spacecraft components, which have been manufactured from ULTEM 9085 using fused deposition

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Resistance-pressure sensitivity and a mechanism study of multiwall carbon nanotube networks/poly(dimethylsiloxane) composites

Cited by 69 publications

References 20 publications

Effect of carbon nanoparticle type, content, and stress on piezoresistive polyethylene nanocomposites

Effect of carbon nanoparticle type, content, and stress on piezoresistive polyethylene nanocomposites

Improved electrical resistance-pressure strain sensitivity of carbon nanotube network/polydimethylsiloxane composite using filtration and transfer process

Thermal imaging using polymer nanocomposite temperature sensors

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