Multi-sensing properties of hybrid filled natural rubber nanocomposites using impedance spectroscopy

Barbosa, Rafael; Gonçalves, Roger; Blanco, Guilherme Eduardo de Oliveira; Saccardo, Matheus Colovati; Tozzi, Kaique Afonso; Zuquello, Ariel Gustavo; Scuracchio, Carlos Henrique

doi:10.1016/j.electacta.2022.141341

Cited by 6 publications

(5 citation statements)

References 57 publications

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“…The Nyquist plots in Figure 13 depict the relationship between real and imaginary impedances of fabricated NR and NR composite films, exhibiting behavior dependent on G loading content. Smaller semicircle diameters indicate higher electrical conductivity due to lower impedance magnitude [ 65 ].…”

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

“…In fact, it tends toward a plateau, appearing as a horizontal line with no slope. This characteristic indicates that the impedance is no longer influenced by frequency in lower frequencies, suggesting the achievement of electrical percolation [65]. For CV measurements (Figure 16), the NR and NR composite films were assessed within a potential range of −1.0 V to 1.0 V. In NR and NR-G-ALG composites with low G loading (up to 30 phr), the closed-loop rectangular shape in the CV graphs suggests nonlinear electrical behavior, resembling capacitance behavior.…”

Section: Electrical Propertiesmentioning

confidence: 93%

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Electrically Conductive Natural Rubber Composite Films Reinforced with Graphite Platelets

Kitsawat,

Siri,

Phisalaphong

2024

Polymers

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Green natural rubber (NR) composites reinforced with synthetic graphite platelets, using alginate as a thickening and dispersing agent, were successfully developed to improve mechanical properties, chemical resistance, and electrical conductivity. The fabrication was performed using a latex aqueous microdispersion process. The research demonstrated the effective incorporation of graphite platelets into the NR matrix up to 60 parts per hundred rubbers (phr) without causing agglomeration or phase separation. Graphite incorporation significantly improved the mechanical strength of the composite films. NR with 60 phr of graphite exhibited the highest Young’s modulus of 12.3 MPa, roughly 100 times that of the neat NR film. The reinforcement also strongly improved the hydrophilicity of the composite films, resulting in a higher initial water absorption rate compared to the neat NR film. Moreover, the incorporation of graphite significantly improved the chemical resistance of the composite films against nonpolar solvents, such as toluene. The composite films exhibited biodegradability at about 21% to 30% after 90 days in soil. The electrical conductivity of the composite films was considerably enhanced up to 2.18 × 10−4 S/cm at a graphite loading of 60 phr. According to the improved properties, the developed composites have potential applications in electronic substrates.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Electrical Propertiesmentioning

confidence: 93%

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Electrically Conductive Natural Rubber Composite Films Reinforced with Graphite Platelets

Kitsawat,

Siri,

Phisalaphong

2024

Polymers

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“…The central advantage is the very low viscosity of latex compared to rubber mixing in the plasticized state, which facilitates fillers dispersion. Another great advantage is the possibility of using high-power sonication to disperse fillers without damage due to the damping effect of ultrasonic waves by the latex viscous medium, as evidenced by previous research by this group [42,43].…”

Section: Introductionmentioning

confidence: 99%

Novel IP²C sensors with flexible electrodes based on plasma-treated conductive elastomeric nanocomposites

Barbosa,

Gonçalves,

Blanco

et al. 2024

Smart Mater. Struct.

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Ionic polymer-metal composites (IPMC) are devices composed of metallic electrodes and an ionomeric polymer membrane in a “sandwich” architecture and. Their main property is electromechanical actuation or sensing based on the movement of ions. Metallic electrodes are commonly used for their high electrical conductivity, malleability, and chemical resistance. However, the high cost of noble metals, such as platinum, long manufacturing time, and fatigue failure limit their application. Therefore, the replacement of metallic electrodes with Conductive Elastomeric Nanocomposites (CENs) was evaluated to reduce the costs and complexity of manufacturing the device and increase its working life. In this work, carbon nanotubes were used as the conductive fillers. The dispersion to achieve high electrical conductivity was carried out directly in the synthetic or natural polyisoprene rubber latex assisted by surfactant and high-power sonication. To improve the adhesion between the elastomeric electrode and the ionic membrane (Nafion), plasma treatment with atmospheric air was applied as a surface modifier. This treatment improved the hydrophilicity and adhesion of the rubbers by forming oxygenated groups and increasing the surface nanoroughness. In this way, ionomeric polymer-polymer composite (IP²C) devices were fabricated using Nafion and plasma-modified CENs, this type of electrode is unprecedented in the literature for this application. These devices showed displacement and strain sensing capacity at levels close to the conventional IPMC in all tested frequency ranges and applied accelerations. Notably, the IP²C obtained better resolution at low frequencies than the control.

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“…Alternately, natural rubber that produced from NRL has significant strength, excellent resilience, and considerable stretching, [ 31 ] and it has already been studied as a natural matrix for nanocomposites. [ 32 ] As a low‐cost, environmentally friendly base material, nature rubber has good elasticity and can quickly return to its original shape after releasing strain. [ 33 ] For example, Boratto et al [ 34 ] reported a highly conductive and stretchable polymer by blending PEDOT:PSS with NRL, which can withstand 700% strain.…”

Section: Introductionmentioning

confidence: 99%

PEDOT:PSS/Natural Rubber Latex Inks for Screen‐Printing Multifunctional Wearable Strain–Humidity Sensors

Ren,

Yang,

Zhang

et al. 2023

Adv Eng Mater

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Wearable strain–humidity sensors are increasingly recognized for their role in healthcare and detecting human motion signals. However, many strain–humidity sensors require complex manufacturing processes and have limited applicability. In this study, based on the good miscibility between natural rubber latex (NRL) and poly (3,4‐ethylenedioxythiophene):poly (4‐styrenesulfonate) (PEDOT:PSS), PEDOT:PSS/NRL composite conductors are transferred onto fabric substrate through screen printing and prepared high‐performance strain–humidity sensor. The PEDOT:PSS/NRL blends strain–humidity sensor exhibited good stability and durability (500 cycles) at 10% strain, achieves a gauge factor (GF) of 123.8 with excellent linearity, making it operational in detecting various human motions, such as finger bending, elbow bending, wrist bending, and so on. In addition, the PEDOT:PSS and water molecules interaction results in a humidity response time as low as 0.72 s and recovery time as low as 0.85 s for the PEDOT:PSS/NRL composite strain–humidity sensor, and a wide relative humidity detection range (6–83%), allowing it to be utilized for precise detection of human breathing. Furthermore, it can monitor the use's joint movement, facial muscle movement, and respiratory rate, which show its potential application prospect in health monitoring.

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Multi-sensing properties of hybrid filled natural rubber nanocomposites using impedance spectroscopy

Cited by 6 publications

References 57 publications

Electrically Conductive Natural Rubber Composite Films Reinforced with Graphite Platelets

Electrically Conductive Natural Rubber Composite Films Reinforced with Graphite Platelets

Novel IP²C sensors with flexible electrodes based on plasma-treated conductive elastomeric nanocomposites

PEDOT:PSS/Natural Rubber Latex Inks for Screen‐Printing Multifunctional Wearable Strain–Humidity Sensors

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Multi-sensing properties of hybrid filled natural rubber nanocomposites using impedance spectroscopy

Cited by 6 publications

References 57 publications

Electrically Conductive Natural Rubber Composite Films Reinforced with Graphite Platelets

Electrically Conductive Natural Rubber Composite Films Reinforced with Graphite Platelets

Novel IP2C sensors with flexible electrodes based on plasma-treated conductive elastomeric nanocomposites

PEDOT:PSS/Natural Rubber Latex Inks for Screen‐Printing Multifunctional Wearable Strain–Humidity Sensors

Contact Info

Product

Resources

About

Novel IP²C sensors with flexible electrodes based on plasma-treated conductive elastomeric nanocomposites