Mechanical and electrical properties in porous structure of Ketjenblack/silicone–rubber composites

Yoshimura, Keijiro; Nakano, K.; Okamoto, Kazuaki; Miyake, Tetsuo

doi:10.1016/j.sna.2012.04.006

Cited by 27 publications

(21 citation statements)

References 18 publications

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“…2 Some composites containing dispersed conductive fillers in an insulating polymer matrix have been studied for flexible force sensor applications. 3,4 Particularly, conductive polymer composites containing carbon based fillers have recently received considerable attention because of their high conductivity, low density, simple preparation process, etc. Furthermore, carbon [graphene, carbon nanotubes (CNTs), carbon nanohorn, etc.]…”

Section: Introductionmentioning

confidence: 99%

“…based polymer composite explored for biomaterial applications exhibits high strength, good interfacial adhesion, enhanced biological functions and high degree of cytocompatibility, which is significant for electronic skin research and application. [5][6][7] There are mainly four types of carbon fillers used: carbon black (CB), 3 graphite (G), 4,8 carbon fibre (CF) 9 and CNTs. [10][11][12] The most widely used type of conductive filler so far is high conductive CB, which has already played an important role in flexible force sensor applications.…”

Section: Introductionmentioning

confidence: 99%

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Synergistic effects and piezoresistive characteristics of carbon nanofillers/silicone rubber composites

Huang

Wang

et al. 2016

Materials Technology

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Silicone rubber (SR) filled with different concentrations of carbon nanotubes (CNTs), carbon black (CB) and (CNTs/CB) hybrid fillers was fabricated by melt blending. The effects of filler type on the electrical properties and piezoresistive properties (in the region of the percolation) of the conductive SR composites were studied. Percolation threshold of CNTs, CB and (CNTs/CB) based composites was found to be 0.20, 0.255 and 0.22 volume fraction respectively. The piezoresistive sensitivity G R of these conductive SR composites, dependent on different filler types, was 0.8549, 0.7267 and 0.9361 respectively. Compared to CB/SR and CNTs/SR, CNTs/CB/ SR revealed an unexpectedly high G R , which indicated that the synergistic effects have formed in CNTs/CB network. In addition, microscopic analysis (SEM) can also explain the existence of synergies. A model describing the electrical percolation of mixed carbon fillers CNTs and CB is proposed. The experimental value (0.22) of hybrid filler systems is smaller than the theoretical value (0.23), which can prove the existence of synergies once again.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Synergistic effects and piezoresistive characteristics of carbon nanofillers/silicone rubber composites

Huang

Wang

et al. 2016

Materials Technology

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“…12,13 Particularly, conductive polymer composites containing carbon-based fillers have received considerable attention because of their high conductivity, low density, ease of processing, and so on. [14][15][16][17][18] There are mainly four types of carbon fillers used: carbon black (CB), graphite (G), carbon fiber (CF), and carbon nanotubes (CNTs). 19,20 Some polymer-based composites containing two different carbon fillers (e.g., CF and CB, CNTs and G) have also been investigated, which led to synergistic effects on network formation in the inner of the composite and improved the piezoresistive properties.…”

Section: Introductionmentioning

confidence: 99%

A multilayered flexible piezoresistive sensor for wide-ranged pressure measurement based on CNTs/CB/SR composite

et al. 2015

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To optimize the structure of the flexible piezoresistive sensor based on conductive polymer composite and widen the workable pressure range, a piezoresistive sensor with a multilayered structure based on carbon nanotubes/carbon black/silicone rubber conductive composite was designed and investigated. Different from the traditional monolayer structure, this novel multilayered sensor consisted of three microstructured piezoresistive composite films. The experimental data showed that the electrical resistance of the sensor varied regularly with a wide range of applied pressure (0-1.8 MPa at least). The high sensitivity, high flexibility, facile fabrication, and low cost were also the advantages of this pressure sensor. In addition, the piezoresistive mechanism was studied and shown to be the synergistic effects of the contact resistance mechanism and bulk resistance mechanism. Factors influencing the piezoresistive properties were also investigated. Moreover, the consecutive loading tests verified the feasibility and stability to use this sensor element for pressure measurement.

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“…Few researches have been conducted on carbon‐based polymer composites to achieve the monotonic piezoresistivity in the high compressive pressure sensing range . For example, 26 vol % carbon black/silicone rubber (CB/SR) developed using solution mixing method under 1 MPa reported by Cai et al .…”

Section: Introductionmentioning

confidence: 99%

Enhanced wide‐range monotonic piezoresistivity, reliability of Ketjenblack/deproteinized natural rubber nanocomposite, and its biomedical application

Madhanagopal

Singh

Omar

et al. 2017

J of Applied Polymer Sci

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Piezoresistive behavior of 6 to 9 wt % Ketjenblack-reinforced deproteinized natural rubber (KB/DPNR) nanocomposite developed by two-roll mill was studied under compressive pressure (0 to 12.54 MPa). The 6 wt % KB/DPNR exhibited monotonic piezoresistivity, the highest electrical resistance change (485%), remarkable reversibility and minimal hysteresis. Furthermore, a good sensitivity (S) 5 1.1 MPa 21 for 0.25 to 2.49 MPa, high test-retest reliability (intraclass correlation co-efficient, ICC 5 0.99) under 0 to 2.49 MPa for three repetitions conducted at an interval of 24 h and excellent repeatability (standard deviation, SD 5 4.8%) to a swing of 6.25 MPa for 50 cyclic compression were achieved. Homogeneous dispersion and high aspect ratio of KB and higher chemical linkage (due to double crosslinking agents) between KB and DPNR may be responsible for the enhanced piezoresistivity. For practical application, the KB/DPNR was interfaced with the microcontroller through a bridge rectifier via custom-built Simulink and successfully monitored finger pressure in real time during bone movement on human.

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Mechanical and electrical properties in porous structure of Ketjenblack/silicone–rubber composites

Cited by 27 publications

References 18 publications

Synergistic effects and piezoresistive characteristics of carbon nanofillers/silicone rubber composites

Synergistic effects and piezoresistive characteristics of carbon nanofillers/silicone rubber composites

A multilayered flexible piezoresistive sensor for wide-ranged pressure measurement based on CNTs/CB/SR composite

Enhanced wide‐range monotonic piezoresistivity, reliability of Ketjenblack/deproteinized natural rubber nanocomposite, and its biomedical application

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