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Liposome-Surface-Initiated ARGET ATRP: Surface Softness Generated by "Grafting from" Polymerization
Tsukuru Masuda1, Naohiko Shimada1, Atsushi Maruyama1
1School of Life Science and Technology , Tokyo Institute of Technology , B-57 4259 Nagatsuta-cho , Midori-ku, Yokohama , Kanagawa 226-8501 , Japan.
Langmuir : the ACS Journal of Surfaces and Colloids
|April 2, 2019
Summary
Researchers developed a new method to modify liposome surfaces with polymers using controlled radical polymerization. This technique enhances liposome surface softness, making them more cell-like for potential drug delivery applications.
Area of Science:
- Biomaterials Science
- Polymer Chemistry
- Nanotechnology
Background:
- Liposomes are lipid vesicles used as cell models and drug delivery systems.
- Liposome surface properties are critical for their function.
- Current modification methods may have limitations.
Purpose of the Study:
- To demonstrate a novel polymer modification of liposome surfaces.
- To achieve this using controlled radical polymerization in aqueous media.
- To create polymer/liposome hybrids with tunable surface properties.
Main Methods:
- Utilized activators regenerated by electron transfer for atom transfer radical polymerization (ARGET ATRP).
- Performed polymerization in aqueous media without deoxygenation.
- Employed dynamic light scattering (DLS) and 1H NMR for characterization.
Main Results:
- Successfully grafted polymers onto liposome surfaces.
- Controlled polymer chain molecular weight by adjusting monomer concentration.
- Observed increased surface softness, comparable to cell surfaces, via electrophoretic behavior.
Conclusions:
- The ARGET ATRP method offers a facile route for liposome surface functionalization.
- The developed technique allows for systematic control over grafted polymer properties.
- This approach provides a guideline for designing polymer/liposome hybrids with desired surface characteristics for advanced applications.