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Functionalization of Single-walled Carbon Nanotubes with Thermo-reversible Block Copolymers and Characterization by Small-angle Neutron Scattering
Published on: June 1, 2016
Nanoparticles on the basis of highly functionalized dextrans.
Tim Liebert1, Stephanie Hornig, Stephanie Hesse
1Center of Excellence for Polysaccharide Research, Friedrich Schiller University of Jena, Humboldtstrasse 10, D-07743 Jena, Germany.
Journal of the American Chemical Society
|July 28, 2005
Summary
New dextran ester nanoparticles were synthesized with controlled amphiphilicity and solubility. These stable, spherical nanoparticles exhibit a narrow size distribution, maintaining their structure for weeks.
Area of Science:
- Polymer Chemistry
- Materials Science
- Nanotechnology
Background:
- Polysaccharides like dextran are versatile biopolymers.
- Developing stable nanostructures from polysaccharides is challenging.
- Controlling amphiphilicity and solubility is key for nanoparticle applications.
Purpose of the Study:
- To synthesize novel dextran ester nanoparticles.
- To achieve precise control over nanoparticle amphiphilicity and solubility.
- To investigate the structural stability and morphology of the synthesized nanoparticles.
Main Methods:
- Dextran propionate synthesis with a degree of substitution of 1.70.
- Acylation using pyroglutamic acid imidazolide under homogeneous conditions.
- Nanoparticle formation via dialysis.
- Characterization using Scanning Electron Microscopy (SEM) and Atomic Force Microscopy (AFM).
Main Results:
- Successfully prepared dextran propionate pyroglutamate nanoparticles.
- Achieved excellent control over amphiphilicity and solubility.
- Nanoparticles displayed a narrow size distribution (mean diameter 370 nm) and uniform spherical shape.
- Demonstrated morphological stability over a 3-week period.
Conclusions:
- The synthesis route offers precise control over nanoparticle properties.
- The functionalized polysaccharide derivative prevents nanostructure collapse.
- The prepared nanoparticles are stable and suitable for various applications.
