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Concentrated polymer brush-modified silica particle coating confers biofouling-resistance on modified materials
Chiaki Yoshikawa1, Jun Qiu2, Yoshihisa Shimizu1
1WPI Research Center for Materials Nanoarchitectonics, National Institute for Materials Science (NIMS), Tsukuba, Ibaraki 305-0044, Japan.
Summary
Researchers developed a simple method to create non-biofouling surfaces using concentrated polymer brushes on silica nanoparticles. These coatings effectively prevent protein adsorption and cell adhesion on various materials, offering broad applications.
Area of Science:
- Materials Science
- Biotechnology
- Surface Chemistry
Background:
- Biofouling, the undesirable attachment of biological matter to surfaces, poses significant challenges in medical and pharmaceutical applications.
- Conventional methods for creating non-biofouling surfaces using concentrated polymer brushes (CPB) are often complex and difficult to implement.
Purpose of the Study:
- To develop a simple and versatile method for fabricating effective non-biofouling coatings.
- To utilize concentrated poly(poly(ethylene glycol) methyl ether methacrylate) (PPEGMA) brushes grafted onto silica nanoparticles (SiPs) for creating these coatings.
Main Methods:
- Grafting PPEGMA brushes onto SiPs via surface-initiated atom transfer radical polymerization.
- Spin-coating CPB-SiPs onto substrates (silicon wafers, QCM chips) with phenyl azido cross-linkers.
- Cross-linking the SiP coatings using UV irradiation or heat treatment.
- Evaluating protein adsorption using Quartz Crystal Microbalance (QCM) and examining cell adhesion.
Main Results:
- The developed coatings demonstrated a near-complete suppression of protein adsorption and human umbilical vein endothelial cell adhesion.
- Varying the SiP to cross-linker weight ratios (2.0/0.5 to 9.0/0.5 wt/wt%) showed effectiveness in preventing biofouling.
- The coating was successfully applied to polymeric films, imparting biofouling-resistant properties.
Conclusions:
- This novel method provides a facile and adaptable approach to creating robust non-biofouling surfaces.
- The CPB-SiP coatings show significant potential for applications requiring resistance to biological contamination.
- The technique is applicable across diverse substrates, including silicon-based materials and polymeric films.
