Cosmetic emulsion physical stability screening by means of rheology

Master’s Dissertation Defense

Lucas Chagas Lima do Carmo
[email protected]

Federal University of Paraná

2020 - 03 - 16

Acknowledgements

Table of Contents

  • Introduction
  • Objectives
  • Materials & Methods
  • Results and Discussion
    • “Classic” methods of stability assessment
    • Influence of oil content on rheology
    • Influence of time on rheology
    • Rheological thermal analysis
  • Final Considerations

Introduction

Cosmetic Industry

Ex-factory revenue of the cosmetic industry since 2006

(ABIHPEC 2018)

“Classic” Stability Studies

Emulsions

Emulsion Types

Colloid Stability - 1

Colloid Stability - 2

Colloid Stability - 3

Colloid Stability - 4

Colloid Stability - 5

Colloid Stability - 6

Colloid Stability - 7

Colloid Stability - 8

Destabilisation Mechanisms

Cosmetic Cream Structure - 1

Cosmetic Cream Structure - 2

Rheology - 1

Rheology - 2

Rheology - 3

Rheology - 4

Rheology - 5

Rheology - 6

Rheology - 7

Rheology - 8

Rheological Thermal Analysis - 1

Rheological Thermal Analysis - 2

Rheological Thermal Analysis - 3

Rheological Variables

Objectives

Objectives

Proposal

Materials and Methods

Cream Composition

Emulsification - 1

Emulsification - 2

Emulsification - 3

Emulsification - 4

Formulas

Methods

Results

Part I - “Classic” Methods

Macroscopic Evaluation - 1

Macroscopic Evaluation - 2

pH Evaluation Over Time - 1

pH Evaluation Over Time - 2

pH Evaluation Over Time - 3

pH Evaluation Over Time - 4

Microscopy 10X Magnification - 1

Microscopy 10X Magnification - 2

Microscopy 10X Magnification - 3

Microscopy 40X Magnification - 1

Microscopy 40X Magnification - 2

Microscopy 40X Magnification - 3

Polarized Light Microscopy - 1

Polarized Light Microscopy - 2

Polarized Light Microscopy - 3

Fraunhofer Diffraction Sizing - 1

Fraunhofer Diffraction Sizing - 2

Fraunhofer Diffraction Sizing - 3

Fraunhofer Diffraction Sizing - 4

Fraunhofer Diffraction Sizing - 5

Droplet Size Over Time

Part II - Influence of oil content on rheology

Amplitude sweeps

Linear Viscoelasticity Region

Yield Stress

Cohesive Energy

Frequency Sweeps

Complex Viscosity

Part III - Influence of storage time on rheology

Yield Stress Over Time

Frequency Sweeps Over Time - 1

Frequency Sweeps Over Time - 2

Frequency Sweeps Over Time - 3

Frequency Sweeps Over Time - 4

Crossover Frequency Over Time

Emulsion Gelled Structure

Part IV - Rheological thermal analysis

Moduli vs. Temperature - 1

Moduli vs. Temperature - 2

Moduli vs. Temperature - 3

Moduli vs. Time - 1

Moduli vs. Time - 2

Moduli vs. Time - 3

Calculating \(\alpha\) and \(\Xi\) - 1

Calculating \(\alpha\) and \(\Xi\) - 2

Calculating \(\alpha\) and \(\Xi\) - 3

Calculating \(\alpha\) and \(\Xi\) - 4

Calculating \(\alpha\) and \(\Xi\) - 5

Distribution of \(\Xi\) values

\(\alpha\) Comparison Between Formulas

Final Considerations

Final Considerations - 1

Final Considerations - 2

lucas carmo/apresentações

ABIHPEC. 2018. “Panorama Do Setor de Higiene Pessoal, Perfumaria e Cosméticos.” Associação Brasileira Da Indústria de Higiene Pessoal, Perfumaria e Cosméticos. Associação Brasileira da Indústria de Higiene Pessoal, Perfumaria e Cosméticos. https://abihpec.org.br/publicacao/panorama-do-setor-2018/.