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Related Experiment Video

Updated: Jun 28, 2026

Encapsulation and Permeability Characteristics of Plasma Polymerized Hollow Particles

Encapsulation and Permeability Characteristics of Plasma Polymerized Hollow Particles

Published on: August 16, 2012

Clonazepam release from core-shell type nanoparticlesin vitro.

H J Kim¹, Y I Jeong, S H Kim

¹Department of Polymer Engineering, Chonnam National University, 500-757, Kwangju, Korea.

Archives of Pharmacal Research

|August 1, 1997

Summary

This summary is machine-generated.

Novel amphiphilic copolymers of poly (L-leucine) and poly (ethylene oxide) were synthesized and formed core-shell nanoparticles. These nanoparticles demonstrated tunable sizes and critical micelle concentrations, influencing drug release profiles.

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Area of Science:

Polymer Chemistry
Materials Science
Nanotechnology

Background:

Amphiphilic copolymers are crucial for developing advanced drug delivery systems.
Poly (L-leucine) (PLL) and poly (ethylene oxide) (PEO) offer distinct hydrophobic and hydrophilic properties, respectively.
Core-shell nanoparticles provide a versatile platform for encapsulating and releasing therapeutic agents.

Purpose of the Study:

To synthesize and characterize AB-type amphiphilic copolymers (LE) composed of PLL and PEO.
To prepare and analyze core-shell nanoparticles using these copolymers.
To investigate the influence of copolymer composition on nanoparticle characteristics and drug release.

Main Methods:

Ring-opening polymerization of L-leucine N-carboxy-anhydride initiated by methoxy polyoxyethylene amine.
Diafiltration method for nanoparticle preparation.
Dynamic light scattering, transmission electron microscopy, and fluorescence probe techniques for characterization.
In vitro drug release studies using clonazepam.

Main Results:

Synthesized LE copolymers with varying PLL compositions.
Prepared spherical core-shell nanoparticles with sizes ranging from 369.6 to 561.2 nm.
Determined critical micelle concentrations (CMC) dependent on PLL content, ranging from 1.5x10^-6 to 2.0x10^-6 mol/l.
Observed that clonazepam release is influenced by PLL composition and drug loading.

Conclusions:

The synthesized poly (L-leucine)/poly (ethylene oxide) copolymers can self-assemble into core-shell nanoparticles.
Nanoparticle properties, including size and CMC, are tunable by adjusting the hydrophobic PLL content.
These nanoparticles show potential for controlled drug delivery, with release kinetics dependent on formulation parameters.