Designing Micro Bulge Structure with Uniform PS Microspheres for Boosted Dielectric Hydrophobic Blend Films

Abstract

In this paper, homogeneous polystyrene (PS) microspheres with controllable sizes of 40 nm, 80 nm, and 120 nm were synthesized by controlling the temperature of solvothermal method. In order to explore the effect of PS microspheres on dielectric-hydrophobic properties of the composite films, the composite films containing polystyrene, Polydimethylsiloxane, and P(VDF-TrFE) with high dielectric and hydrophobicity were successfully prepared by a simple and feasible solution blending method. The dielectric constant and hydrophobicity of composite films were boosted by increasing the mass fraction of PS content and decreasing the size of PS due to the enhanced interfacial polarization and the uniform surface micro bulge structure. Meanwhile, the composite films maintain a low loss tangent. Typically, the dielectric constant with 5 wt.% 40 nm PS reached to 29 at 100Hz, which is 4 times that of PDMS/P(VDF-TrFE) (mass ratio: 2/3). Otherwise, the largest the contact angle of 126° in the same composition was remarkably larger than the pure PDMS/P(VDF-TrFE) (110°). These improved properties have more potential applications in the electric wetting devices.

Ultraviolet-Induced Gas Sensing Performance of Ag/WO3/rGO Nanocomposites for H2S Gas Sensors

“…The peak intensity decreases after the addition of Ag to the binary material. This is mainly due to the increase in the particle size of the material after the addition of Ag, which is consistent with the literature. , …”

“…This is mainly due to the increase in the particle size of the material after the addition of Ag, which is consistent with the literature. 30,31 To confirm the existence of rGO, Figure 3 shows the Raman spectra of WO 3 , rGO, and WO 3 /rGO. The Raman spectra of WO 3 exhibit three major characteristic peaks at 803, 715, and 271 cm −1 , which correspond to the stretching of O−W−O and W−O and the bending vibration of O−W−O, respectively.…”