A novel route towards tunable piezoresistive behavior in conductive polymer composites: Addition of insulating filler with different size and surface characteristics

Zhou, Yi; Zhou, Yan; Deng, Hua; Fu, Qiang

doi:10.1016/j.compositesa.2017.02.002

Cited by 35 publications

(10 citation statements)

References 40 publications

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“…Most of the studies resulted in numerous commercial applications of CPC, e.g., as bipolar plates for polymer membrane fuel cells, organic solar cells, conductive adhesives and paints, pressure and strain sensors, actuators, biomaterials, etc. [1][2][3][4][5]. This type of composites consists of an insulating polymer matrix and an electrically conductive filler which provides a continuous conduction network due to the percolation mechanism.…”

Section: Introductionmentioning

confidence: 99%

Conductive hybrid polymer composites based on recycled carbon fibres and carbon nanofillers

Zambrzycki

2018

J Mater Sci

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The aim of this study was to investigate potential applications of milled secondary carbon fibres as a primary filler in conductive polymer composites. The examined composites were based on epoxy resin, milled secondary carbon fibres and selected carbon nanoadditive used as a secondary conductive filler.Three kinds of nanopowders were tested: multiwalled carbon nanotubes, graphene nanoplatelets and graphitized carbon black. In the first stage of the experiment, composites with different percentages of carbon fibres were examined in order to determine the electrical conductivity and percolation threshold. Subsequently, the most conductive composition (70% of carbon fibres, r = 9.05 S cm -1 ) was modified by adding nanofillers. The addition of carbon nanotubes caused more than twofold increase in in-plane conductivity to 20.18 S cm -1 . The composites with graphene nanoplatelets showed deterioration of properties due to strongly increased viscosity of a binder with graphene. Small loadings of graphitized carbon black had a minor positive impact on the electrical conductivity and mechanical properties of composites.

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Section: Introductionmentioning

confidence: 99%

Conductive hybrid polymer composites based on recycled carbon fibres and carbon nanofillers

Zambrzycki

2018

J Mater Sci

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“…"> ii.Another challenge is reliability, which closely relates to temperature, monotonicity, and cyclic stability. [22a,b,24,95] Although many studies reported cyclic stability, the temperature effect and the monotonicity with clearly indicated resolution have not yet been reported. Temperature poses a significant effect on the reliability since the performance of all polymers is highly susceptible to temperature.…”

Section: Challenges and Outlook For Stretchable Strain Sensorsmentioning

confidence: 99%

A Path Beyond Metal and Silicon:Polymer/Nanomaterial Composites for Stretchable Strain Sensors

Qiu

Yang

et al. 2019

Adv Funct Materials

165

135

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Conventional strain sensors based on metals and semiconductors are rigid and cannot measure soft and stretchable objects. Thus, new strain sensors based on polymer/nanomaterial composites are attracting more interest. Although much effort has been dedicated to achieve high values of both sensitivity and stretchability with linearity, this work endeavors to search and establish guidelines for the development of stretchable strain sensors, by critically reviewing conventional sensors and examining recent progress. It starts from introducing key parameters for conventional strain sensors; these parameters are further discussed for their potential impact on new polymer/nanomaterial strain sensors. The work concludes that there are no general benchmarks for conventional strain sensors utilized in industry. From the findings, the authors suggest that stretchable strain sensors should be custom designed and developed to meet particular measurement requirements, in comparison with a generic aim of yielding a sensor with high degrees of stretchability, sensitivity, and linearity. Challenges are discussed, including reliability, calibration to be used as proper gauges, and soft data acquisition systems.

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“…Many types of sensors are known, including strain sensors, [1,2] capacitive sensors, [3][4][5][6][7] and piezoresistive sensors. [8][9][10][11][12][13] Generally, numerous traditional strain sensors are based on metals (Au, [14,15] Ag, [16][17][18][19] and ZnO nanowires [20] ) or semiconductors. [21][22][23] Yet, the main drawback of these sensors is the lack of the high sensitivity and large workable strain range simultaneously.…”

Section: Introductionmentioning

confidence: 99%

Flexible strain sensor based on biomass‐derived material

Zhao

et al. 2020

Polymer Composites

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In recent years, the strain sensors, which can be fixed on human skin to monitor movement, have attracted a considerable attention. In this study, the walnut shell powder was carbonized and mixed with polydimethylsiloxane, followed by encapsulation to prepare a highly flexible strain sensor. The obtained sensor was tested for the electrical and sensing properties. The experimental results revealed that the sensor is stable and reliable in the range of 0% to 40% strain response, while the effective working frequency of the sensor is in the range of 0.01 to 0.5 Hz. Moreover, the carbonized the walnut shell powder/PDMS prepolymer and its curing agent (PDMSCA) strain sensor exhibited an excellent fatigue resistance. No significant attenuation phenomenon was observed after 1000 cycles of stretching. The strain sensor was then attached to a volunteer throat, knee, elbow, and fingers joints. The corresponding human movements determined obvious sensing response and repeatability. This work proposes a new flexible strain sensor based on environmentally friendly materials, which is obtained by means of a facile preparation method. Hence, this work can open up new avenues for the development of novel and effective strain sensors using cost‐effective carbonized materials as filling materials.

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A novel route towards tunable piezoresistive behavior in conductive polymer composites: Addition of insulating filler with different size and surface characteristics

Cited by 35 publications

References 40 publications

Conductive hybrid polymer composites based on recycled carbon fibres and carbon nanofillers

Conductive hybrid polymer composites based on recycled carbon fibres and carbon nanofillers

A Path Beyond Metal and Silicon:Polymer/Nanomaterial Composites for Stretchable Strain Sensors

Flexible strain sensor based on biomass‐derived material

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