Abstract

MICROSPONGES – A NOVEL TOOL IN COSMETICS

Prince Paulraj W.*, Bharathi S., Sashtika Shree D. S., Padmavathi P.

Abstract

Microsponges are innovative, porous polymeric carriers that offer a controlled and sustained release of active ingredients in cosmetic formulations. Their distinctive porous network allows encapsulation of lipophilic actives, protecting them from degradation while minimizing skin irritation and enhancing product stability. This unique delivery system improves texture, aesthetic feel, and user compliance, making it suitable for applications such as anti-acne treatments, sunscreens, antiaging creams, and fragrance release. Preparation methods like quasi-emulsion solvent diffusion and liquid–liquid suspension polymerization allow customization of particle size, porosity, and drug loading to meet specific formulation goals. Key evaluation parameters include particle morphology, encapsulation efficiency, release kinetics, stability, and flow properties. Despite their advantages, challenges such as limited hydrophilic drug loading, polymer safety concerns, scale-up, and regulatory requirements remain. Emerging research explores smart polymer integration, hybrid microsponge nanogel systems, and nanotechnology-based enhancements, broadening their potential in cosmeceuticals and targeted topical delivery. This review synthesizes current knowledge, applications, and prospects, highlighting microsponges as a promising tool for next-generation cosmetic innovations.

Keywords: Microsponges, Cosmetic formulations, Controlled release, Sunscreen stability, Polymers.