A Mechanism of Low Surface Tension and Spreading

The exceptional defoaming and antifoaming performance of Methyl Hydrogen Silicone Fluid stems from its fundamental physicochemical properties. With an extremely low surface tension (~20-22 mN/m), it readily enters and spreads across the lamellae of foam bubbles.

This spreading action displaces the stabilizing surfactant layer, creating a region of low surface elasticity that leads to rapid bubble rupture and coalescence. Effective at parts-per-million (ppm) concentrations, MHSF-based defoamers are workhorses in demanding processes such as pesticide formulation, wastewater treatment, and crude oil refining. Their chemical inertness ensures they do not interfere with process chemistry, while their thermal stability allows them to function in high-temperature environments up to 150°C.