Studies on composites based on HTV and RTV silicone rubber and carbon nanotubes for sensors and actuators

Kumar, Vineet; Lee, Gayeon; Monika, .; Prakash, Nunna Guru; Lee, Dong-Joo

doi:10.1016/j.polymer.2020.122221

Cited by 68 publications

(41 citation statements)

References 44 publications

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“…[ 33 ] Therefore, CNT combines the lower viscosity and high mechanical properties, making them good candidates for high performance polymer composites. [ 40 ] Moreover, studies have shown the structure‐property relationship in silicone rubber composites and CNT, GR, and CB. [ 19 ] Studies found that CNTs with a one‐dimension tube‐shape structure and a high aspect ratio exhibit high mechanical and electrical properties.…”

Section: Resultsmentioning

confidence: 99%

Investigation of silicone rubber composites reinforced with carbon nanotube, nanographite, their hybrid, and applications for flexible devices

Kumar

Alam

Manikkavel

et al. 2020

Vinyl Additive Technology

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New technology is constantly required for updating new generation flexible devices, such as stretchable sensors, flexible electronics, and actuators. In the present study, a stretchable strain sensor, and actuator were developed based on room‐temperature‐vulcanized (RTV) silicone rubber reinforced with carbon nanotubes (CNTs), nanographite (GR), and CNT‐GR hybrids. A CNT‐based strain sensor developed for RTV silicone rubber showed improved stiffness and brittleness. For example, at 5 phr of filler loading, the compressive and tensile modulus for the CNT‐reinforced RTV silicone matrix improved by 287% and 240%, respectively. Similarly, the improvements in the compressive and tensile modulus were moderate for the CNT‐GR hybrid (210% and 235%) and low for GR (135% and 125%). The improved brittleness resulted in a higher fracture strain of 170% and 155% for the CNT‐GR hybrid and GR, respectively. The improved mechanical properties were tested in real‐life applications of actuation. The actuation displacement at a filler loading of 2 phr increased to 1.65 mm (CNT), 1.25 mm (CNT‐GR), and 0.08 mm (GR). From 2 to 8 kV, the actuation displacement increased by 825% (CNT), 830% (CNT‐GR), and 32% (GR). The strain sensor showed a stretchability of >100% (CNT) and >100% (CNT‐GR). In addition, the gauge factor was higher for the CNT‐GR hybrid composites. The durability measurements showed that the change in resistance was negligible for up to 5000 cycles in both the CNT and CNT‐GR rubber composites. A series of experiments confirmed that compared to the composite based on RTV silicone rubber and CNT, the CNT‐GR hybrid showed a robust flexibility and stretchability as a piezo‐resistive strain sensor and actuator.

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Section: Resultsmentioning

confidence: 99%

Investigation of silicone rubber composites reinforced with carbon nanotube, nanographite, their hybrid, and applications for flexible devices

Kumar

Alam

Manikkavel

et al. 2020

Vinyl Additive Technology

Self Cite

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“…RTV has high resistivity to acid/base conditions, heat, chemicals, and ageing. [44,45] It is characterized by simple operation, low viscosity, and shrinking, as well as extreme hardness and mechanical stress. RTV has been utilized in electronics, printing and aviation technologies, as well as in casting various materials such as polyester and epoxy resins.…”

Section: Introductionmentioning

confidence: 99%

Development of photoluminescent, superhydrophobic, and electrically conductive cotton fibres

et al. 2021

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A simple method for the preparation of multifunctional nanocomposite was developed towards the production of water-repellent, electrically conductive, and photoluminescent film onto cotton fibres. The nanocomposite was composed of lanthanide-doped strontium aluminium oxide and silicon rubber dispersed in petroleum ether. The electrically conductive fabric was woven from nickel strips twisted with cotton filaments as core yarns, which were wrapped with pure cotton yarns. The nanoparticles (NPs) of lanthanide-doped strontium aluminium oxide were mixed with environmentally friendly room-temperature vulcanizing silicon rubber (RTV-SR) dis-

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“…These composites, particularly the ones with liquid Q, have been reported to be very useful in high-voltage indoor and outdoor systems, and CNTs function by extending the service life of Q in such applications [92,93]. Since Q-CNTs composites are heat, fire and chemically resistant with excellent electrical conductivity and weatherability, they can ideally be employed in the cable, potting and encapsulation sector, particularly as sealing and insulating materials for energy transmission and distribution, electronic utility systems, high frequency communications, wearable electronics, soft robotics, health and sport performance monitoring, oil drilling and automotive electronics [76,77,[92][93][94][95]. Additionally, silicon-CNTs micropatterns can be fabricated and used in biomedical and chemical sensors, tissue engineering, drug screening, and optical devices [92].…”

Section: Silicone Rubber-cnts Compositesmentioning

confidence: 99%

Carbon Nanotubes as Reinforcing Nanomaterials for Rubbers Used in Electronics

Gumede¹,

Carson²,

Hlangothi³

2021

Carbon Nanotubes - Redefining the World of Electronics

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The field of electronics involves complex systems where the active and passive electronic devices are integrated on the rubber substrate, e.g., silicone (Q), which provides, through potting, a strong assembly of these devices on the circuit board. Several other rubbers are employed in the field to strengthen, insulate and seal the components of the electronic machines and instruments, and therefore protect them against damage. These rubbers are typically strengthened and toughened using carbon black (CB). However, due to its noticeable drawbacks, recent research in the field of rubber and electronics has suggested the use of carbon nanotubes (CNTs) as alternative reinforcing fillers to produce electronics rubber composites that do not only have enhanced electrical conductiv¬ity, thermal stability, electromagnetic interference (EMI) shielding, weatherability and insulation properties, but also offer outstanding stretchability, bendability and tear strength under frequent elastic deformation. These performances are similar for both single-walled carbon nanotubes (SWCNTs) and multi-walled carbon nanotubes (MWCNTs) in both the functional and structural composites. Although SWCNTs can result in relatively better homogeneity than MWCNTs, most rubbers often constitute MWCNTs because they are relatively cheaper. The great potential of rubber-CNTs composites being extensively used in the field of electronics is explored in this chapter.

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Studies on composites based on HTV and RTV silicone rubber and carbon nanotubes for sensors and actuators

Cited by 68 publications

References 44 publications

Investigation of silicone rubber composites reinforced with carbon nanotube, nanographite, their hybrid, and applications for flexible devices

Investigation of silicone rubber composites reinforced with carbon nanotube, nanographite, their hybrid, and applications for flexible devices

Development of photoluminescent, superhydrophobic, and electrically conductive cotton fibres

Carbon Nanotubes as Reinforcing Nanomaterials for Rubbers Used in Electronics

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