We study how interfacial forces impact the dynamics of complex fluids such as suspensions, emulsions, foams, micro-emulsions, polymers and glasses. These are already crucial for industrial processes and products due to their peculiar rheology and flow characteristics. But we are now in an era where industries must maneuver through quick transitions in technologies under restricting resources, laying stress on novel materials that tailor to a purpose with a specific property. Through a combination of experiments and theoretical models we create the desired characteristics by using fundamentals of solid mechanics, hydrodynamics, surface phenomena and statistical thermodynamics. We rely on experimental techniques of imaging, diffraction and scattering, rheometry and use computational techniques such as molecular dynamics and finite element methods.