Protein blowing agents based on hydrolysates of keratin-containing raw materials obtained by hydrolysis using sodium hydroxide and sodium sulfide

The production of a cheap industrial protein foaming agent with optimal foaming properties is an important research area. Protein foams based on keratin hydrolysates, obtained by alkaline hydrolysis, have complex properties, The European Union has a number of important international agreements on this subject. The dependence of protein foaming properties on alkali hydrolysis conditions of keratin-containing raw materials allows to optimize the hydrolysis process with the result hydrolysate core component protein foamer. During the work, foaming agents were prepared on the basis of hydrolysates obtained using sodium hydroxide and sodium sulphide at different concentrations in hydrolysing solutions. The evaluation of the foam forming properties obtained in the experiment was carried out on such indicators of foam formation as foam multiplication, volume weight of foam, Foam stability during the regulated time and average rate of reduction of foam resistance.

The analysis of the results of the experiment showed that the quality of the protein foaming agent directly depends on the qualitative and quantitative composition of the hydrolyzing solution when producing a keratin-containing hydrolysate. From the blowing agents obtained in the experiment only some of them corresponded to the established ones and were characterized by high foam resistance in the range of 1.5 hours, which made it possible to select optimal compositions of hydrolyzing solutions for obtaining a blowing agent based on keratin-containing raw materials.