ArticlePolymers2026
Preparation of Multifunctional Alginate-PEG-Chitosan Double Shell and Thyme Oil-Oleic Acid Core Microcapsules via Coaxial Electrospraying.
Article in Polymers, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
The growing interest in bio-based and bioactive materials, as well as sustainable production techniques, has driven the development of multifunctional hybrid systems. This study reports the fabrication of novel microcapsules with a double-layer alginate-PEG-chitosan shell, with or without a core, via coaxial electrospraying, followed by ionotropic gelation and polyelectrolyte complexation. PEG1000 and PEG1500 were incorporated into the shell as phase change materials, and thyme oil-oleic acid served as a hydrophobic bioactive core. Scanning electron microscopy and Fourier transform infrared analyses confirmed the structural integrity and effective shell-core integration. Thermogravimetric analyses showed enhanced thermal stability in double-layer alginate-PEG-chitosan biopolymer network shell and thyme oil included core system, with a delayed degradation up to 370.0 °C and reduced mass loss compared to the alginate-chitosan control sample. Differential scanning calorimetry over ten heating-cooling cycles demonstrated significant phase transition enthalpies (70.5-91.8 J·g
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