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February 21, 2026Polymer Science Series A

Inclusion of Aqueous Polymer Microgel Particles in Silica Nanocapsules Via Surfactant-Free Inverse Miniemulsion Polymerization

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Authors

LZLan ZhouSHShuang HeXZXiaomin Zhu

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Overview

This work demonstrates the encapsulation of microgel particles in silica nanocapsules, suggesting potential applications in cosmetics and biomedicine.

Key Points

  • The study aims to develop a method for encapsulating aqueous microgel particles in silica nanocapsules using inverse miniemulsion polymerization.
  • Preparation of poly(N-vinyl-2-pyrrolidone)-based microgel@SiO2 core-shell particles.
  • Utilization of hyperbranched polyethoxysiloxanes as emulsifier and silica precursor.
  • Emulsification of monomer solution in a tetradecane silica precursor using ultrasonication.
  • Polymerization process conducted via heating.
  • Control of particle morphology based on the monomer concentration.
  • Emulsion droplets and capsules are smaller with higher hexadecyl substitution degrees.
  • Low monomer concentration results in yolk-shell structures, while higher concentrations lead to fully occupied microgel interiors.
  • Further increases in monomer concentration eliminate the hollow structure and restrict microgel swelling.
  • Microgel@SiO2 capsules show potential for slow, triggerable release of hydrophilic substances.

Cite This Study

Zhou et al. (2025) studied this question.

synapsesocial.com/papers/69994a7f873532290d01ef72https://doi.org/10.1134/s0965545x25601182
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