Mechanical properties of calcium alginate fibers produced with a microfluidic device

► Uniform fibers of calcium alginate gel were produced in a controlled manner. ► Effect of the concentration of alginate and Ca2+ on their mechanical properties. ► Increasing the Ca2+ the tensile stress increased up to a maximum around 1.4% or 127 mM. ► The maximum tensile stress is several times the stoichiometric requirement. ► The mechanical properties may be related to the number of “egg-box” sites formed.