Determination of the Real Influence of the Addition of Four Thickening Agents in Creams Using Rheological Measurements

Abstract

This study aimed to characterize different emulsions obtained by the addition of four thickening agents, using rheological measurements, beyond analyzing the emulsions by polarized light microscopy looking for liquid crystals on them. The addition of these four thickening agents did not modify the base emulsion rheology, only an improvement in the sensory of the formulation was verified. The polarized light microscopy showed the formation of liquid crystalline structures in all the formulations, thus, the thickening agents did not influence in this parameter too. However, the emulsions could be considered appropriated for cosmetic purposes, probably being highly physically stable.

Keywords:

• Emulsions
• liquid crystals
• polymers
• rheology
• thickening agents

Notes

^{a b} Different letters indicate statistically different values.

**p < 0.05.

^a Same letter indicates statistically equal values.

**p < 0.05.

To CAPES and CNPq by the grant of scholarships to the students who contributed to this research. To FINEP, by the financial support. To ISP and Lipo, by the raw materials donation for the execution of this work.