Pickering emulsion polymerization of poly(ionic liquid)s encapsulated nano-SiO2 composite particles with enhanced electro-responsive characteristic

The Effect of Dielectric Polarization Rate Difference of Filler and Matrix on the Electrorheological Responses of Poly(ionic liquid)/Polyaniline Composite Particles

“…This enhancement due to the improvement of ER structure has been investigated in our previous work, and, therefore, is not discussed here [38]. Compared to other PIL-based composite, like GO/PPy/PIL composite nanosheets or PIL/SiO2 composite particles [29,30], As shown in Figure 9, Equations (2) and (3) can well fit the experimental dielectric data and Table 1 summarizes the dielectric characteristics. It is found that two relaxation processes in composites can be clarified, which can be respectively attributed to PIL matrix and PANI filler according to the magnitude of λ, and the conductivity of different forms of PANI after doping or dedoping.…”

“…This enhancement due to the improvement of ER structure has been investigated in our previous work, and, therefore, is not discussed here [38]. Compared to other PIL-based composite, like GO/PPy/PIL composite nanosheets or PIL/SiO 2 composite particles [29,30], the ∆ε' of PIL/PANI(NH 3 ) composites is also relatively larger and λ is more suitable and thus result in enhanced ER response compared to them. Figure 10 shows the dielectric relaxation spectra of these ER fluids at various temperatures.…”

“…For example, Chen et al used a multi-layer coating technique to prepare graphene oxide/polypyrrole/PIL composite ER particles showing enhanced yield stress. Zhao et al used a Pickering emulsion polymerization to prepare PIL/nano-SiO 2 composite ER particles showing enhanced temperature stability [29,30]. However, these studies have focused on yield stress or thermal stability.…”

The Electric Field Responses of Inorganic Ionogels and Poly(ionic liquid)s

“…In this process, inorganic nanoparticles rather than organic molecules are applied as emulsifier, producing inorganic nanoparticles-wrapped PILs particles. By using this way, Zhao et al prepared PILs encapsulated nano-SiO 2 composite, in which process nano-SiO 2 was applied as a solid emulsifier [ 101 ]. It indicated that the SiO 2 nanoparticles on the surface of the composite particles can largely decrease the leaking current density and improve the working temperature range of the ER fluid.…”

“…The core-shell structure of two interfaces is beneficial to increase the interfacial polarization, which makes SiO 2 @PILs have strong ER performance under the electric field. For the PILs encapsulated nano-SiO 2 (PILs/SiO 2 ) particles by Picking emulsion polymerization [ 101 ], nano-SiO 2 on the surface of the composite particles seems like a cross-linking point which will increase the activation energy of ion migration of PILs and significantly inhibit the leakage current at high temperature. As a result, the leakage current of composite particles is small at 100 °C.…”