Colloids in Cosmetics and Personal Care
edited by Tharwat F. Tadros

Colloids in Cosmetics and Personal Care describes the role of colloids in cosmetics and personal care, highlighting the importance of fundamental research in practical applications.

This volume gives comprehensive coverage of several applications of colloid and interface science principles in personal care and cosmetic formulations. It also shows how to relate the rheological characteristics of the complex systems of emulsions, suspensions and their mixtures, with some of the sensory attributes, which will enable the formulation scientist to arrive at the right recipe in a shorter period of time.

Contents

1 Colloid Aspects of Cosmetic Formulations with Particular Reference to Polymeric Surfactants

• Interaction Forces and Their Combination
• Self-Assembly Structures in Cosmetic Formulations
• Structure of Liquid Crystalline Phases
• Driving Force for Formation of Liquid Crystalline Phases
• Polymeric Surfactants in Cosmetic Formulations
• Polymeric Surfactants for Stabilization of Nanoemulsions
• Polymeric Surfactants in Multiple Emulsions
• Polymeric Surfactants for Stabilization of Liposomes and Vesicles

2 Formulation and Stabilization of Nanoemulsions Using Hydrophobically Modified Inulin

• Materials
• Preparation of Nanoemulsions
• Determination of Droplet Diameter
• Steric Stabilization of Nanoemulsions and the Role of the Adsorbed Layer Thickness
• Ostwald Ripening

3 Integrating Polymeric Surfactants in Cosmetic Formulations for the Enhancement of Their Performance and Stability

• Materials and Methods

4 Application of Colloid and Interface Science Principles for Optimization of Sunscreen Dispersions

• Steric Stabilization
• Solubility Parameters
• Influence of the Adsorbed Layer Thickness on the Energy–Distance Curve
• Criteria for Effective Steric Stabilization and Influence of Other Ingredients in the Formulation
• Materials and Methods

5 Use of Associative Thickeners as Rheology Modifiers for Surfactant Systems

• Surfactant Systems as Rheology Modifiers
• Associative Thickeners as Rheology Modifiers
• Materials and Methods

6 Cosmetic Emulsions Based on Surfactant Liquid Crystalline Phases: Structure, Rheology and Sensory Evaluation

• Structure of Liquid Crystalline Phases
• Driving Force for the Formation of Liquid Crystalline Phases
• Formulation of Liquid Crystalline Phases
• Emulsion Stabilization Using Lamellar Liquid Crystals
• Materials and Methods

7 Personal Care Emulsions Based on Surfactant–Biopolymer Mixtures: Correlation of Rheological Parameters with Sensory Attributes

• Materials and Methods
• Results

8 Correlation of "Body Butter" Texture and Structure of Cosmetic Emulsions with Their Rheological Characteristics

• Experimental

9 Interparticle Interactions in Color Cosmetics

• Fundamental Principles of Preparation of Pigment Dispersions
• Assessment of Wettability
• Dispersing Agents
• Stabilization
• Surface–Anchor Interactions
• Optimizing Steric Potential
• Classes of Dispersing Agents
• Assessment of Dispersants
• Application of the Above Fundamental Principles to Color Cosmetics
• Principles of Preparation of Color Cosmetics

10 Starch-Based Dispersions

• Starch-Based Nanomaterials
• Dispersions
• Nanocomposites, Blends and Their Properties
• Biodegradability
• Starch–Additive Complexes

11 In Vivo Skin Performance of a Cationic Emulsion Base in Comparison with an Anionic System

• Materials and Methods

12 The Impact of Urea on the Colloidal Structure of Alkylpolyglucoside-Based Emulsions: Physicochemical and In Vitro/In Vivo Characterization

• Experimental

13 Models for the Calculation of Sun Protection Factors and Parameters Characterizing the UVA Protection Ability of Cosmetic Sunscreens

• Basic Principle
• Calculation of the Overall UV Spectrum of a Sunscreen Agent
• Models for Film Irregularities
• Taking Photoinstabilities into Consideration
• Consideration of the Distribution of the UV Extinction in the Water and the Oil Phases of the Formulation
• Calculation of UVA Parameters
• Correlations

Index

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