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Related Experiment Video

Updated: Dec 13, 2025

Extraction of Plant-based Capsules for Microencapsulation Applications

Extraction of Plant-based Capsules for Microencapsulation Applications

Published on: November 9, 2016

Double-Layered Microcapsules Significantly Improve the Long-Term Effectiveness of Essential Oil.

Ting Zhang¹, Yu Luo¹, Mingxing Wang²

¹National Engineering Laboratory for Modern Silk, College of Textile and Clothing Engineering, Soochow University, No. 199 Ren'ai Road, Industrial Park, Suzhou 215123, China.

|July 30, 2020

Summary

This study developed double-layered microcapsules using beta-cyclodextrin, chitosan, and sodium alginate to enhance essential oil effectiveness. These microcapsules offer sustained release and potential applications in various consumer products.

Keywords:

double-layered microcapsules essential oil sustained release

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Last Updated: Dec 13, 2025

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Area of Science:

Materials Science
Chemical Engineering
Textile Chemistry

Background:

Essential oils offer numerous benefits but suffer from poor long-term effectiveness and stability.
Developing advanced encapsulation techniques is crucial for preserving and prolonging the release of active compounds from essential oils.

Purpose of the Study:

To create and characterize a novel double-layered microcapsule system for improved essential oil delivery.
To optimize the preparation process of these microcapsules using the response surface method.
To evaluate the application of these microcapsules in functionalizing cotton fabric.

Main Methods:

Preparation of double-layered microcapsules using inclusion encapsulation with beta-cyclodextrin (inner layer) and chitosan/sodium alginate (outer layer).
Optimization of the preparation process via response surface methodology.
Characterization of microcapsule properties: morphology, particle size, encapsulation efficiency, thermal stability, and sustained release.
Loading of microcapsules onto cotton fabric using the soak-roll method.

Main Results:

Spherical microcapsules with particle sizes ranging from 2-6 μm were successfully prepared.
High encapsulation efficiency (up to 80%) and good thermal stability (within 250 °C) were achieved.
Sustained release of essential oil active ingredients was demonstrated under both normal and high-temperature conditions.
Cotton fabric functionalized with microcapsules exhibited excellent washability, rubbing fastness, and retained fragrance for two months.

Conclusions:

The developed double-layered microcapsules effectively enhance the long-term performance of essential oils.
The microcapsule system demonstrates significant potential for applications in textiles, offering sustained fragrance release.
Potential applications span across sleep aid, antibacterial products, mosquito repellents, and food science.