Magneto‐hydrodynamic mixing: A new technique for preparing carbomer hydrogels

Magnetohydrodynamic mixing was evaluated as an alternative to conventional high shear (HSM) in the preparation of carbomer hydrogels containing 1.22 wt% Carbopol® 980 NF. Neutralization dispersion (pH = 2.74) with triethanolamine (TEA) enabled adjust pH mixture and tune viscosity hydrogel. Using HSM, this approach limited 0.2 TEA 3.83) gel became too viscous recirculation flow dropped from 12 0.3 m3/h. reach concentrations up 1.0 5.31). Apparent measurements on samples having revealed lower viscosities for prepared that is, 6800 mPa s versus 8800 magneto-hydrodynamic mixing. Based 1H NMR evidence, decrease apparent attributed structural damage backbone combination mechanochemical degradation added TEA.