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Pol J Cosmetol 2017, 20(1): 87-91en  Selected physicochemical and functional properties of hair conditioner emulsions containing hydrolyzed silkMałgorzata Zięba, Anna Płusa, Anna Małysa, Emilia Klimaszewska Katedra Chemii, Wydział Materiałoznawstwa Technologii i Wzornictwa, Uniwersytet Technologiczno-Humanistyczny w Radomiu Summary Introduction. Hydrolyzed silk has a number of valuable properties and its chemical composition shows a high degree of similarity to proteins naturally found in the skin and hair. As a result, it is a desirable ingredient for a wide range of cosmetics. Added to hair care products, hydrolyzed silk produces a moisturizing effect, and makes the hair softer, more flexible, smooth and glossy. Aim. The aim of the study was to assess selected physicochemical and functional properties of hair conditioner emulsions containing hydrolyzed silk. Material and methods. The study material comprised hair care emulsions formulated specifically for the present paper, containing hydrolyzed silk at a concentration from 0% to 5%. The analysis focused on the effect of the addition of hydrolyzed proteins on the properties of hair conditioner emulsions. The cosmetics were subjected to a number of tests evaluating their stability, dynamic viscosity, consistency and solubility in water. Sensory tests were also conducted. The underlying assumption was that the properties were very important for hair conditioner emulsions. Results. The concentration of hydrolyzed silk was not found to have a significant effect on dynamic viscosity values in the hair conditioners under study. The hardness of products of this type increases along with rising hydrolyzed protein concentrations, whereas the adhesive force decreases. The time of emulsion dissolution was shown to increase as a function of increasing hydrolyzed silk concentration in the hair conditioners. From the viewpoint of sensory profiles, the most advantageous solution is to introduce 3% and 5 wt% of the additive under study to hair conditioner formulations. Conclusions. An addition of hydrolyzed silk to hair conditioner emulsions has a favourable effect in terms of modifying the physicochemical and functional properties of cosmetics of this type. The results obtained in the study can be very helpful in the process of formulating hair conditioners containing hydrolyzed silk. Key words: hair conditioners, hydrolyzed silk, emulsions |