[Preparation of tea polyphenols sustained-release microcapsule]

Area of Science:

• Materials Science: Development of novel microencapsulation techniques.
• Pharmaceutical Sciences: Formulation of stable drug delivery systems.

Context:

• Tea polyphenols (TP) possess valuable antioxidant and health benefits but suffer from poor stability and bioavailability.
• Microencapsulation is a promising strategy to protect sensitive compounds and control their release.

Purpose:

• To prepare ethylcellulose (EC)-based microcapsules containing tea polyphenols (TP) using emulsion solvent evaporation.
• To investigate the effects of preparation parameters on microcapsule characteristics, including size and entrapment efficiency.
• To evaluate the impact of the microencapsulation process on the integrity of TP and its release profile.

Summary:

• Ethylcellulose microcapsules loaded with tea polyphenols were successfully fabricated via emulsion solvent evaporation.
• Polyvinyl alcohol (PVA) and sodium dodecyl sulfate (SDS) were employed as dispersants, yielding porous microcapsules.
• Stirring rate, polymer concentration, and drug payload significantly influenced microcapsule size and entrapment efficiency.
• The preparation method preserved the active components of TP, enhancing its stability and enabling sustained release.

Impact:

• The developed microcapsules offer improved stability for tea polyphenols, protecting them from degradation.
• Sustained release of tea polyphenols from the microcapsule matrix can lead to prolonged therapeutic effects.
• This formulation strategy holds potential for enhancing the efficacy of TP in various applications, including nutraceuticals and pharmaceuticals.