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Updated: Mar 10, 2026

Production of Near-Infrared Sensitive, Core-Shell Vaccine Delivery Platform
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Versatile Loading of Diverse Cargo into Functional Polymer Capsules.

Joseph J Richardson1, James W Maina1, Hirotaka Ejima1

  • 1ARC Centre of Excellence in Convergent Bio-Nano Science and Technology and the Department of Chemical and Biomolecular Engineering The University of Melbourne Parkville Victoria 3010 Australia.

Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
|December 17, 2016
PubMed
Summary

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Conventional oral drug products, termed immediate-release (IR) formulations, are engineered to promptly release their active pharmaceutical ingredient (API) upon ingestion, typically in tablets or capsules. This rapid release often results in swift drug absorption and consequent pharmacodynamic effects, although the timing and intensity can vary depending on the drug's properties. Prodrugs within these formulations require metabolic conversion to activate their pharmacodynamic effects,...
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Rate-programmed drug delivery systems release drugs in a controlled manner to maintain therapeutic levels. Three main designs include reservoir, matrix, and hybrid systems.Reservoir systems consist of a drug core enclosed within a membrane that controls drug release. In non-swelling reservoir systems, polymers like ethyl cellulose or polymethacrylates are used. These do not hydrate in aqueous media and control release through membrane thickness, porosity, or insolubility. This type includes...
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Modified-release drug delivery systems improve drug efficacy and minimize side effects by controlling the rate and location of drug release. These systems fall into three categories: rate-programmed, stimuli-activated, and site-targeted.Rate-programmed systems release drugs at a predetermined rate, maintaining consistent therapeutic levels and reducing fluctuations that could lead to toxicity or subtherapeutic effects. These systems use polymeric matrices, reservoir-based designs, or osmotic...
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Researchers developed a fast, gentle method to create polymer microcapsules with diverse functional cargo. This versatile technique enables over 500 variations for applications in coatings, catalysis, and drug delivery.

Area of Science:

  • Materials Science and Engineering
  • Polymer Chemistry
  • Nanotechnology

Background:

  • Polymer microcapsules are crucial for advanced applications like self-healing coatings, catalysis, bioreactions, sensing, and drug delivery.
  • The functionality of these microcapsules is primarily determined by the incorporation of specific cargo within their structure.

Purpose of the Study:

  • To present a facile and versatile method for loading diverse functional and therapeutic cargo into polymer microcapsules.
  • To establish a comprehensive toolbox of polymer microcapsules with a wide range of functionalities.

Main Methods:

  • Utilized polymer-stabilized calcium carbonate (CaCO3) particles as a platform for cargo encapsulation.
  • Demonstrated the loading of 15 distinct types of cargo into the microcapsules.
Keywords:
drug deliverydrug loadinginorganic templatesnanomedicinepolymer capsules

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  • Developed a rapid process (under 30 minutes) for capsule preparation, cargo loading, coating, and hollow capsule formation, avoiding harsh reagents.

    • Main Results:

    • Successfully created polymer microcapsules with incorporated functional cargo, demonstrating over 500 potential variations.
    • The method proved effective for a wide array of cargo types, highlighting its versatility.
    • The entire fabrication process, from preparation to hollow capsule formation, was completed in under 30 minutes.

    Conclusions:

    • The developed technique offers a highly efficient and adaptable approach for creating functional polymer microcapsules.
    • This method is expected to significantly impact various scientific fields due to its ease of use, speed, and versatility.
    • The extensive cargo loading capacity and rapid preparation time make this a valuable tool for research and development.