Hyaluronic Acid is a molecule that naturally occurs in our skin that binds water to collagen to help hydrate skin. Because of it's natural hydrating capabilities it is commonly found in cosmetic serums, sheet masks, and moisturizers.
Flow channel geometry can be varied to produce different types of continuous deformation. VROC® microfluidic flow channels are available with a uniform cross-section for steady shear viscosity measurement or a centrally located hyperbolic contraction-expansion for extensional viscosity estimation.
In this application note, we measure hyaluronic acid solutions with varying concentration and preparation methods in both types of channels to illustrate the differences in fluid response between the two types of deformation.