Polydimethylsiloxane Elastomers Filled with Rod-Like α-MnO2 Nanoparticles: An Interplay of Structure and Electrorheological Performance

Polymers

AntonS. Kraev¹  AlexanderV. Agafonov¹  VladimirK. Ivanov²  AlexanderE. Baranchikov²  AnastasiaA. Egorova²  SergeyA. Kozyukhin² 

[1] Krestov Institute of Solution Chemistry of the Russian Academy of Sciences, 153045 Ivanovo, Russia;Kurnakov Institute of General and Inorganic Chemistry of the Russian Academy of Sciences, 119991 Moscow, Russia;

关键词: nanocomposites;    electrorheological elastomers;    smart materials;    Payne effect;    vulcanisation;    manganese dioxide;   

DOI  :  10.3390/polym12122810

来源: DOAJ

【 摘 要 】

For the first time, electroactive nanocomposite elastomers based on polydimethylsiloxane and filled with rod-like α-MnO₂ nanoparticles have been obtained. The curing of the filled elastomer in an electric field, resulting in the ordering of the α-MnO₂ particles, had a significant effect on the degree of polymer crosslinking, as well as on the electrorheological characteristics of the nanocomposites obtained through this process, namely the values of the storage and loss moduli. The dielectric spectra of filled elastomers in the frequency range 25–10⁶ Hz were analysed in terms of interfacial relaxation processes. It has been shown, for the first time, that the application of an electric field leads to a decrease in the value of the Payne effect in composite elastomers. Analysis of the rheological effect in the obtained materials has demonstrated the possibility of designing highly efficient electrorheological elastomers that change their elastic properties by 4.3 times in electric fields of up to 2 kV/mm.

【 授权许可】

Unknown