Pluronic F127 thermosensitive injectable smart hydrogels for controlled drug delivery system development

Area of Science:

• Materials Science
• Biomedical Engineering
• Pharmaceutics

Background:

• Structure-property relationships are crucial for developing advanced drug delivery systems.
• Pluronic smart hydrogels offer potential as injectable controlled drug carriers, improving patient compliance and reducing side effects.
• These hydrogels exhibit a unique sol-gel phase transition at body temperature, alongside biocompatibility and injectability.

Purpose of the Study:

• To investigate the properties of Pluronic smart hydrogel formulations for injectable controlled drug delivery.
• To quantify structural changes in Pluronic F127 systems under controlled temperature and shear stress, mimicking injection conditions.
• To develop empirical formulae describing the coupled thermal and shear dependency for future applications.

Main Methods:

• In-situ structural analysis using small-angle X-ray scattering (SAXS) and small-angle neutron scattering (SANS).
• Controlled temperature and shear flow experiments to simulate physiological injection conditions.
• Quantification of structural transitions within the hydrogel systems.

Main Results:

• Pluronic F127 systems exhibit temperature- and shear-induced structural transitions.
• Mixed oriented structures were observed within the hydrogels.
• Empirical formulae were derived to describe the combined thermal and shear effects on hydrogel structure.

Conclusions:

• The study provides critical insights into the structure-property relationships of Pluronic smart hydrogels.
• Understanding these transitions allows for the optimization of hydrogel formulations for controlled drug release.
• These findings facilitate the future application of injectable Pluronic hydrogels in drug delivery systems.