Colloids and Interfaces, Год журнала: 2025, Номер 9(3), С. 26 - 26
Опубликована: Май 2, 2025
Stabilizing micron-sized particles in low-viscosity polymer dispersions is challenging when density differences are present. This study demonstrates that graphite aqueous polyurethane can be efficiently prevented from sedimentation using the capillary suspension concept. Capillary suspensions solid/liquid/liquid systems and forces inferred adding a second immiscible fluid lead to drastic changes texture flow. Here, both spherical flake-shaped were used as fillers, with octanol secondary liquid. At low concentrations, increases low-shear viscosity significantly attributed formation of loose particle aggregates immobilizing part continuous phase. Above critical concentration, induce self-assembling, percolating network, leading sharp yield stress increase (>100 Pa). The corresponding network suppresses sedimentation; for system including 28 vol% particles, shelf life at least six months was achieved. do not affect high-shear suspensions; here, hydrophobically modified polyether thickener used. Transfer stabilization concept presented here other high-density like silver or metal oxides suspended straightforward applicable various fields flexible printed electronics.
Язык: Английский