Improved Mechanical and Electrochemical Properties of XNBR Dielectric Elastomer Actuator by Poly(dopamine) Functionalized Graphene Nano-Sheets

Yang, Dan; Kong, Xinxin; Ni, Yufeng; Ruan, Mengnan; Huang, Shuo; Shao, Puzhen; Guo, Weihong; Zhang, Liqun

doi:10.3390/polym11020218

Cited by 39 publications

(33 citation statements)

References 41 publications

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“…It was expected that the amount of PDA on the GO surfaces could be evaluated from the TGA results. As shown in Figure 7, PDA has the lowest thermal stability, starting thermal degradation around 180 °C due to the partial decomposition of the main chain in three different stages with a maximum at around 260 °C [64]. The weight loss observed for graphite is very low and mainly due to the release of adsorbed water and residual oxidation [61].…”

Section: Resultsmentioning

confidence: 99%

Elucidating the Chemistry behind the Reduction of Graphene Oxide Using a Green Approach with Polydopamine

et al. 2019

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A new approach using X-ray photoelectron spectroscopy (XPS) was employed to give insight into the reduction of graphene oxide (GO) using a green approach with polydopamine (PDA). In this approach, the number of carbon atoms bonded to OH and to nitrogen in PDA is considered and compared to the total intensity of the signal resulting from OH groups in polydopamine-reduced graphene oxide (PDA-GO) to show the reduction. For this purpose, GO and PDA-GO with different times of reduction were prepared and characterized by Raman Spectroscopy and XPS. The PDA layer was removed to prepare reduced graphene oxide (RGO) and the effect of all chemical treatments on the thermal and electrical properties of the materials was studied. The results show that the complete reduction of the OH groups in GO occurred after 180 min of reaction. It was also concluded that Raman spectroscopy is not well suited to determine if the reduction and restoration of the sp2 structure occurred. Moreover, a significant change in the thermal stability was not observed with the chemical treatments. Finally, the electrical powder conductivity decreased after reduction with PDA, increasing again after its removal.

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Section: Resultsmentioning

confidence: 99%

Elucidating the Chemistry behind the Reduction of Graphene Oxide Using a Green Approach with Polydopamine

et al. 2019

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“…This ultrahigh dielectric constant in rGO-based polymer composites has been seldom reported in the current literature. [37][38][39][40][41][42][43][44][45][46][47][48][49] Table 1 presents a comparison between the dielectric properties of different composites with graphene as the conductive ller and different polymers as the matrix reported in the literature in recent years; as can be seen from the table, the dielectric constants of most of the reported composites are less than 2000, a few of them are between 2000 and 10 000, and scarcely any of them are more than 10 000. A high dielectric constant generally corresponds to a high dielectric loss, and a low dielectric loss corresponds to a low dielectric constant.…”

Section: Dielectric Property Of Mgsmentioning

confidence: 99%

A reduced graphene oxide–borate compound-loaded melamine sponge/silicone rubber composite with ultra-high dielectric constant

Zhang

Dai

et al. 2019

RSC Adv.

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“…When the frequency is lower, the orientation polarization can keep up with the change of the electric field. [ 47,48,44 ] All three kinds of polarization affect the dielectric constant. With the increasing frequency, the orientation polarization was out of step, resulting in a gradual decrease in the dielectric constant.…”

Section: Resultsmentioning

confidence: 99%

Improved thermal and electrical properties of epoxy resin composites by dopamine and silane coupling agent modified hexagonal BN

et al. 2020

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The high thermal conductivity epoxy resin composites filled with inorganic filler can improve the low thermal conductivity of epoxy resin. However, a large number of fillers with high thermal conductivity will reduce other properties of the composites, which limits their use under high voltage, high temperature and strong mechanical force during operation. In this study, the dopamine-modified BN (DBN) and k-DBN (DBN modified by coupling agent KH-560) were prepared by employed the dopamine with catechol groups and coupling agent to modify boron nitride. The thermal conductivity, thermal stability, and dielectric properties of composites with different contents of modified fillers were studied. The results showed that surface modification improved the dispersibility of BN in the resin matrix and compatibility with the resin. Among BN/EP, DBN/EP, k-DBN/EP composites, k-DBN/EP composites had the highest thermal conductivity at the same number of additions. When the k-DBN/EP content was 30 wt%, the thermal conductivity of the composite was 0.892 W/(mÁK), which was an increase of 25.5% compared with the BN/EP composite. The appropriate amount of BN filling (20 wt%) can improve the breakdown strength of the composite material.

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Improved Mechanical and Electrochemical Properties of XNBR Dielectric Elastomer Actuator by Poly(dopamine) Functionalized Graphene Nano-Sheets

Cited by 39 publications

References 41 publications

Elucidating the Chemistry behind the Reduction of Graphene Oxide Using a Green Approach with Polydopamine

Elucidating the Chemistry behind the Reduction of Graphene Oxide Using a Green Approach with Polydopamine

A reduced graphene oxide–borate compound-loaded melamine sponge/silicone rubber composite with ultra-high dielectric constant

Improved thermal and electrical properties of epoxy resin composites by dopamine and silane coupling agent modified hexagonal BN

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