Piezoresistive natural rubber-multiwall carbon nanotube nanocomposite for sensor applications

Selvan, Namagal; Eshwaran, S. B.; Das, Amit; Stöckelhuber, Klaus Werner; Wießner, Sven; Pötschke, Petra; Nando, G. B.; Chervanyov, A. I.; Heinrich, Gert

doi:10.1016/j.sna.2016.01.004

Cited by 119 publications

(91 citation statements)

References 49 publications

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“…In contrast to metal-and carbon black-filled nanocomposites with negative pressure coefficients, CNTs-or graphene-filled elastomers exhibit extremely sensitive positive pressure coefficients [142][143][144][145]. This is because the elastomeric matrix slides in the direction perpendicular to the direction of stress, while MWCNT clusters are dragged along with the polymer chains and pulled apart transversely, resulting in the separation and breaking of the A c c e p t e d M a n u s c r i p t connections between adjacent MWCNTs [142].…”

Section: 1 2 3 1 P I E Z O R E S I S T I V E E L a S T O M E R mentioning

confidence: 99%

Transport performance in novel elastomer nanocomposites: Mechanism, design and control

Guo

Tang

Zhang

2016

Progress in Polymer Science

134

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Section: 1 2 3 1 P I E Z O R E S I S T I V E E L a S T O M E R mentioning

confidence: 99%

Transport performance in novel elastomer nanocomposites: Mechanism, design and control

Guo

Tang

Zhang

2016

Progress in Polymer Science

134

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“…Natural rubber (NR) composites with carbon nanotube (CNT) filler have been widely investigated with the main purpose to prepare strong elastic materials with high electrical conductivity. Typically, the addition of CNT could transform NR from electric insulator to conductive material with outstanding flexibility, elasticity and mechanical properties [1][2][3]. However, the optimum electrical conductivity and other related properties of NR/CNT composites are mainly controlled by localization and three dimensional networks of CNTs in the rubber matrix [4,5].…”

Section: Introductionmentioning

confidence: 99%

Influence of carbon nanotube and ionic liquid on properties of natural rubber nanocomposites

Krainoi¹,

Kummerloewe²,

Nakaramontri³

et al. 2019

Express Polym. Lett.

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Some properties of carbon nanotube (CNT) filled natural rubber (NR) composites were improved by adding an ionic liquid (IL), 1-butyl-3-methyl imidazolium bis (trifluoromethylsulphonyl)mide (BMI). In this work, the CNT and IL (CNT-IL) were mixed with NR by latex mixing method. Cure characteristics, thermo-mechanical properties, Payne effect, electrical conductivity and thermal stability were investigated. It was found that IL (BMI) accelerated vulcanization reactions and reduced scorch time. In addition, Fourier Transform Infrared (FTIR) results confirmed the role of IL in NR composites along with the reaction between CNT and NR molecules. The temperature scanning stress relaxation (TSSR) measurement was used to assess thermo-mechanical properties, and a relaxation peak of IL was found due to interactions of cations and anions in IL (BMI). Furthermore, the Payne effect was used to qualitatively analyze the roles of IL and CNT in three-dimensional CNT networks in the NR matrix. It was found that CNT dispersion was finer in the NR/CNT composites with IL. Furthermore, the NR/CNT-IL composite had higher electrical conductivity and lower percolation threshold concentration than the NR/CNT composite.

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“…The materials range from stretchable polymers, such as poly(dimethyl siloxane) (PDMS) and Ecoflex, to conductive fillers, such as nanowires, nanoparticles, and low dimensional carbonaceous materials, as well as their hybrid micro‐/nanostructures . In particular, owing to the excellent mechanical compliancy and unique electric characteristics, substantial efforts have been focused on exploiting carbonaceous materials such as carbon nanotubes (CNTs) and graphene in the development of FTSS.…”

Section: Introductionmentioning

confidence: 99%

3D Graphite–Polymer Flexible Strain Sensors with Ultrasensitivity and Durability for Real‐Time Human Vital Sign Monitoring and Musical Instrument Education

Guo

Fan

2017

Adv Materials Technologies

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to motion sensors. [9][10][11][12][13][14][15][16][17] In particular, flexible thin-film strain sensors (FTSS) that are attached to epidermis and detect small movements have received intensive research interest. [11,[17][18][19][20][21][22] According to working mechanisms, FTSS devices can be categorized based on the employed capacitive, [17,19] piezoelectric, [23][24][25] piezoresistive, [11,18,26] and optical effects. [27][28][29] The materials range from stretchable polymers, such as poly(dimethyl siloxane) (PDMS) [11,26,[30][31][32] and Ecoflex, [33] to conductive fillers, such as nanowires, [34,35] nanoparticles, [21,36] and low dimensional carbonaceous materials, [10][11][12]18,33,37] as well as their hybrid micro-/nanostructures. [38][39][40] In particular, owing to the excellent mechanical compliancy and unique electric characteristics, substantial efforts have been focused on exploiting carbonaceous materials such as carbon nanotubes (CNTs) [11,18,33,39,[41][42][43][44][45][46][47][48][49][50][51][52] and graphene [9,10,30,31,40,51,[53][54][55][56][57][58][59][60][61] in the development of FTSS.Carbon nanotubes, a type of quasi-1D structures with high aspect ratios, have been developed in the formation of percolation conducting networks for elastic strain sensors. [22] The high elasticity in such sensors can be attributed to the homogeneous propagation of microcracks in CNT films and extendable lateral space among aligned CNTs. Both the pressure and tensile strain sensors made of CNTs that utilize the capacitive effect can sustain strains up to 300%. [18,41] The working principle of such sensors, however, limits the gauge factor (GF) up to 1, [22] where the GF is a parameter used to characterize the strain sensitivity of resistive strain sensors and is given by GF = (R − R 0 )/(R 0 ε) and ε is strain. By employing the piezoresistive mechanism, a class of wearable and stretchable devices fabricated from thin films of aligned single-walled carbon nanotubes on PDMS substrates can provide a large range of strains up to 410% and improved GF up to 12. [11,62] A GF as high as 35 can be achieved at a strain of 1%. [44] It can be found that the CNTbased strain sensors usually exhibit high tolerance in strains while low GFs. In contrast, the excellent piezoresistive properties of 3D graphene foams with monolithic porous structures allow strain sensors constructed from these materials offering much higher GFs. [22] Chen et al. fabricated 3D interconnected graphene networks using chemical vapor deposition (CVD) and embedded these networks in a PDMS matrix to create strain sensors that withstand tensile strains up to 95% and provide a GF of 2. [26] Graphene in nanocellulose nanopapers show aThe design and fabrication of various types of flexible, portable, and foldable devices have received immense interest owing to the remarkable potential in impacting peoples' lives including real-time health monitoring, pointof-care diagnosis, and athletic training. In this work, the authors present 3D graphite as the key sensing ...

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Piezoresistive natural rubber-multiwall carbon nanotube nanocomposite for sensor applications

Cited by 119 publications

References 49 publications

Transport performance in novel elastomer nanocomposites: Mechanism, design and control

Transport performance in novel elastomer nanocomposites: Mechanism, design and control

Influence of carbon nanotube and ionic liquid on properties of natural rubber nanocomposites

3D Graphite–Polymer Flexible Strain Sensors with Ultrasensitivity and Durability for Real‐Time Human Vital Sign Monitoring and Musical Instrument Education

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