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Water in Oil Emulsions: A New System for Assembling Water-soluble Chlorophyll-binding Proteins with Hydrophobic Pigments
Published on: March 21, 2016
Texture optimization of water-in-oil emulsions
V Lemaitre-Aghazarian1, P Piccerelle, J P Reynier
1Faculté de Pharmacie de Marseille, Laboratoire de Pharmacie Galénique et Industrielle, Marseille, France. v.aghazarian@caramail.com
Pharmaceutical Development and Technology
|June 19, 2004
Summary
This study reveals how oily phase (OP) variations impact water-in-oil (W/O) emulsion properties. Increasing OP content generally enhances hardness and viscosity but reduces adhesiveness and cohesiveness in emulsions.
Area of Science:
- Physical Chemistry
- Materials Science
- Colloid Science
Background:
- Water-in-oil (W/O) emulsions are crucial in various industries, including cosmetics and pharmaceuticals.
- Understanding the relationship between formulation parameters and emulsion properties is key for product development.
Purpose of the Study:
- To investigate the influence of oily phase (OP) characteristics on the rheological and textural attributes of W/O emulsions.
- To determine how variations in OP nature, volume fraction, hydrophilic-lipophilic balance (HLB), and surfactant proportion affect emulsion performance.
Main Methods:
- Formulation of W/O emulsions using an optimal experimental design.
- Characterization of emulsions through texture analysis, rheology, and particle size analysis.
- Systematic variation of OP type (e.g., sweet almond oil, liquid paraffin), volume fraction, HLB value, and surfactant concentration.
Main Results:
- Increased OP volume fraction significantly elevated emulsion hardness and viscosity, particularly with vegetable oils.
- Higher OP content led to decreased adhesiveness and cohesiveness in the emulsions.
- The hydrophilic-lipophilic balance (HLB) value of the surfactant mixture modulated emulsion hardness, adhesiveness, and elasticity.
Conclusions:
- Oily phase composition and concentration are critical determinants of W/O emulsion rheology and texture.
- Formulation adjustments related to OP volume fraction and HLB offer a means to tailor emulsion properties for specific applications.
- Findings provide valuable insights for optimizing W/O emulsion formulations in product development.
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