| 초록 |
A series of porosity-controlled graphene oxide-coated mesoporous silica spheres (GO/SiO2) are successfully fabricated to investigate the influence of porosity on the electrorheological (ER) study. Particularly, various silica spheres are synthesized with Stöber and surfactant template methods to create 1 nm, 2 nm, and 10 nm sized pores on the silica spheres. Graphene-oxide nanosheets (＜ 100 nm) are wrapped onto the mesoporous silica spheres using electrostatic interaction to increase the ER efficiency. In this experiment, mesoporous silica sphere with largest pore size exhibits most enhanced ER activity due to increased dielectric property. Notably, the shear stress inversion phenomenon is scrutinized to deviate from normal Bingham behavior. This newly designed ER study successfully examines the effect of the porosity on the electro-responsive performance. |
