“…Thanks to its cold water solubility and presence of carboxymethyl (─COOH or ─COO − Na + ) functional groups it is widely applied in many branches of industry, for example, textile and paper industry, pharmacy, cosmetics, and environment protection. [1,2] Moreover, its aqueous solutions can be used as binders for sand foundry [3][4][5] wood, [6] drilling mud, [7,8] DOI: 10.1002/star.201900240 or production of electrorheological fluids. [9,10] Viscosity of CMS solutions is a very important factor in many applications and it can be regulated by, for example, optimization of starch etherification parameters, [11,12] slight crosslinking [13,14] or additive incorporation, for example clays, into solutions.…”