Novel nitrile-butadiene rubber composites with enhanced thermal conductivity and high dielectric constant

Yang, Dan; Kong, Xinxin; Ni, Yufeng; Gao, Dahai; Yang, Bin; Zhu, Yangyang; Zhang, Liqun

doi:10.1016/j.compositesa.2019.05.015

Cited by 78 publications

(43 citation statements)

References 37 publications

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“…It can be concluded that the results of dielectric analysis illustrated that the ACN 15 - g -ENR 1 sample is suitable to be a host polymer for electrochemical applications, owing to it showing an enhancement in the dielectric behavior compared to the other samples. Supplementary Information Table S7 summarizes the dielectro-thermo-mechanical proper-ties of NR, ENR- 25, ENR- 50, and NBR from the previous studies, compared to ACN- g -ENR synthesized at various mole ratios [ 61 , 62 , 63 , 64 , 65 , 66 , 67 , 68 , 69 , 70 ].…”

Section: Resultsmentioning

confidence: 99%

Free-Radical Photopolymerization of Acrylonitrile Grafted onto Epoxidized Natural Rubber

et al. 2021

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The exploitation of epoxidized natural rubber (ENR) in electrochemical applications is approaching its limits because of its poor thermo-mechanical properties. These properties could be improved by chemical and/or physical modification, including grafting and/or crosslinking techniques. In this work, acrylonitrile (ACN) has been successfully grafted onto ENR- 25 by a radical photopolymerization technique. The effect of (ACN to ENR) mole ratios on chemical structure and interaction, thermo-mechanical behaviour and that related to the viscoelastic properties of the polymer was investigated. The existence of the –C≡N functional group at the end-product of ACN-g-ENR is confirmed by infrared (FT-IR) and nuclear magnetic resonance (NMR) analyses. An enhanced grafting efficiency (~57 %) was obtained after ACN was grafted onto the isoprene unit of ENR- 25 and showing a significant improvement in thermal stability and dielectric properties. The viscoelastic behaviour of the sample analysis showed an increase of storage modulus up to 150 × 103 MPa and the temperature of glass transition (Tg) was between −40 and 10 °C. The loss modulus, relaxation process, and tan delta were also described. Overall, the ACN-g-ENR shows a distinctive improvement in characteristics compared to ENR and can be widely used in many applications where natural rubber is used but improved thermal and mechanical properties are required. Likewise, it may also be used in electronic applications, for example, as a polymer electrolyte in batteries or supercapacitor.

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Section: Resultsmentioning

confidence: 99%

Free-Radical Photopolymerization of Acrylonitrile Grafted onto Epoxidized Natural Rubber

et al. 2021

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“…37 23 Measured* PU gel without boron nitride (BN) 0 . 2 23 Measured* Silicone rubber 0.16 25 54 Nitrile-butadiene rubber 0.157 30 55 Natural rubber 0.18 – 56 Styrene-butadiene rubber 0.232 – 57 *The parameters of our cover are measured by the hot disk method (TPA-501, Kyoto Electronics Manuf. Co., LTD, Japan).…”

Section: Resultsmentioning

confidence: 99%

Soft robotic shell with active thermal display

Osawa

Kinbara

Kageoka

et al. 2021

Sci Rep

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Almost all robotic systems in use have hard shells, which is limiting in many ways their full potential of physical interaction with humans or their surrounding environment. Robots with soft-shell covers offer an alternative morphology which is more pleasant in both appearance and for haptic human interaction. A persisting challenge in such soft-shell robotic covers is the simultaneous realization of softness and heat-conducting properties. Such heat-conducting properties are important for enabling temperature-control of robotic covers in the range that is comfortable for human touch. The presented soft-shell robotic cover is composed of a linked two-layer structure: (1) The inner layer, with built-in pipes for water circulation, is soft and acts as a thermal-isolation layer between the cover and the robot structure, whereas (2) the outer layer, which can be patterned with a given desired texture and color, allows heat transfer from the circulating water of the inner part to the surface. Moreover, we demonstrate the ability to integrate our prototype cover with a humanoid robot equipped with capacitance sensors. This fabrication technique enables robotic cover possibilities, including tunable color, surface texture, and size, that are likely to have applications in a variety of robotic systems.

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“…Thermal conductivity values of NR nanosilica composites found to slightly higher compared to NR gum as nanosilica has a low value of thermal conductivity [51]. Minor enhancement in thermal conductivity of NR 4SIPX-NS composite compared to NR 3NS composite may be due to the better interaction, which is beneficial for the transmission of a phonon with decreased phonon scattering [52].…”

Section: Thermal Stability Of Nr Nanosilica Compositesmentioning

confidence: 91%

Functionalized Nanosilica for Vulcanization Efficiency and Mechanical Properties of Natural Rubber Composites

Dileep

Jacob

Chandra

et al. 2021

Silicon

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Nano silica Modified nano silica Sodium isopropyl xanthate Modified nano silica NR chains Vulcanization More chain entanglements between NR chains and modified nanosilica Highlights  Sodium isopropyl xanthate (SIPX) is an efficient accelerator for silica modification. SIPX-bound nanosilica improves cure time of natural rubber (NR) compounds. Improved silica -rubber interaction is achieved by SIPX modification. Thermal aging properties of NR composites are improved by SIPX-NS addition.

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Novel nitrile-butadiene rubber composites with enhanced thermal conductivity and high dielectric constant

Cited by 78 publications

References 37 publications

Free-Radical Photopolymerization of Acrylonitrile Grafted onto Epoxidized Natural Rubber

Free-Radical Photopolymerization of Acrylonitrile Grafted onto Epoxidized Natural Rubber

Soft robotic shell with active thermal display

Functionalized Nanosilica for Vulcanization Efficiency and Mechanical Properties of Natural Rubber Composites

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