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Related Experiment Video

Updated: Jan 20, 2026

Flash NanoPrecipitation for the Encapsulation of Hydrophobic and Hydrophilic Compounds in Polymeric Nanoparticles
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Rapid, Single-Step Protein Encapsulation via Flash NanoPrecipitation.

Shani L Levit1, Rebecca C Walker1, Christina Tang2

  • 1Chemical and Life Science Engineering Department, Virginia Commonwealth University, Richmond, VA 23284-3028, USA.

Polymers
|August 30, 2019
PubMed
Summary

Flash NanoPrecipitation (FNP) enables rapid, single-step protein encapsulation into nanoparticles. This efficient method achieves high encapsulation efficiency for proteins, overcoming previous limitations.

Keywords:
Flash NanoPrecipitationelectrostatic interactionsnanoparticlespolyethylenimineprotein encapsulationself-assemblytannic-acid

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Last Updated: Jan 20, 2026

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Area of Science:

  • Biotechnology
  • Materials Science
  • Nanotechnology

Background:

  • Encapsulating hydrophobic materials in polymer nanoparticles using Flash NanoPrecipitation (FNP) is efficient.
  • Encapsulating biologics like proteins is challenging due to low hydrophobicity and multi-step processes.
  • Developing rapid, single-step protein encapsulation methods is crucial for advanced applications.

Purpose of the Study:

  • To report a rapid, single-step protein encapsulation method using FNP.
  • To demonstrate the feasibility of encapsulating bovine serum albumin (BSA) as a model protein.
  • To investigate the nanoparticle self-assembly mechanism driven by specific interactions.

Main Methods:

  • Utilized Flash NanoPrecipitation (FNP) for nanoparticle formation.
  • Employed tannic acid for protein complexation and precipitation.
  • Stabilized nanoparticles using a cationic polyelectrolyte.

Main Results:

  • Achieved high encapsulation efficiency (up to ~80%) for BSA.
  • Demonstrated nanoparticle self-assembly driven by hydrogen bonding and electrostatic interactions.
  • Confirmed nanoparticle stability at physiological pH and ionic strength.

Conclusions:

  • FNP is a rapid and efficient platform for single-step protein encapsulation.
  • This method overcomes limitations of previous protein encapsulation techniques.
  • The developed nanoparticles show promise for various biotechnological applications.