Welcome to the PoreLab lecture with Professor Shervin Bagheri from the KTH Royal Institute of Technology, Sweden.
When: Wednesday 12 April at 13:00 (Oslo time)
Who: Professor Shervin Bagheri from the KTH Royal Institute of Technology, Sweden
Title: Liquid-infused materials and surfaces
In this talk, I will present the design of multiphase porous materials — which consist of a solid scaffold, an infused fluid, and an external fluid — with the aim of controlling transport phenomena.
Firstly, I will present a liquid-infused material (LIM), which features locked liquid-liquid interfaces in three-dimensional porous scaffolds. By adjusting the wettability and incorporating appropriate “fluid traps,” we can immobilize interfaces of various morphologies, such as spherical droplets or diamond-shaped structures. These multiphase materials exhibit exceptional stability and offer a high area-to-volume ratio, making them ideal for use in actuator design, cell-encapsulation, and flow-continuous heterogeneous catalysis.
Secondly, I will discuss liquid-infused surfaces (LIS), in which liquid-liquid interfaces are locked in textured surfaces and exposed to an external shear flow. These surfaces — when the liquid-liquid interface remains stable — can enhance heat and mass exchange with bulk flows and reduce flow drag and biofouling. We will demonstrate how shear stresses and soluble surfactants
influence the dynamics of the liquid-liquid interface, leading to waves, drainage, and Marangoni stresses.