Development of Polymer Complexed Lamella That Retains α-gel Structure When Dried.

Area of Science:

• Materials Science
• Pharmaceutical Formulation
• Cosmetic Science

Background:

• Lipid crystallization in formulations can compromise product stability and efficacy.
• Developing stable formulations that maintain functional properties, like moisturization, is crucial.

Purpose of the Study:

• To introduce and characterize a novel α-gel formulation technology, polymer complexed lamella (PCL).
• To investigate the ability of PCL to suppress lipid crystallization and maintain skin moisturization properties.

Main Methods:

• Development of the PCL formulation using hydroxypropyl methyl cellulose (HPMC) and glycerol.
• Evaluation of lipid crystallization suppression post-drying.
• Assessment of HPMC-lipid interactions at high temperatures.
• Testing of the formulation's occlusive and moisturization effects under mechanical stress (repeated bending).

Main Results:

• The PCL method effectively suppressed lipid crystallization, even after drying.
• High-temperature mixing of HPMC and glycerol maximized the anti-crystallization effect.
• Glycerol's interaction with HPMC reduced HPMC mobility, directly regulating lipid structure and inhibiting crystallization.
• The PCL formulation retained its occlusive and skin moisturization benefits despite repeated membrane bending.

Conclusions:

• Polymer complexed lamella (PCL) is a novel formulation technology that effectively prevents lipid crystallization.
• The synergistic interaction between HPMC and glycerol is key to regulating lipid structure and enhancing formulation stability.
• PCL formulations offer sustained skin moisturization and occlusive benefits, demonstrating robustness under mechanical stress.