Surface properties of whey protein gels are reviewed based on traditional microscopic
techniques and new methods, as optical profilometer and contact angle measurements. Optical
profilometer is an instrument allowing measurement of surface roughness and contact angle
measurements to determine the surface wettability behavior (hydrophobicity/hydrophilicity) of the
gels. Investigation of surface properties of whey protein gels is very important, as it can transform
this product to a new level of application. It could be used as a matrix for an active ingredient
release, material for tissue engineering, e.g. scaffolds, i.e. temporally structures biodegraded in the
human organism