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The in situ 'grafting from' approach for the synthesis of polymer brushes on upconversion nanoparticles via NIR-mediated RAFT polymerization
- Source :
- Polymer Chemistry. 12:545-553
- Publication Year :
- 2021
- Publisher :
- Royal Society of Chemistry (RSC), 2021.
-
Abstract
- We report the first example of in situ polymer brush growth on the surface of upconversion nanoparticles (UCNPs) in a one-pot near-infrared (NIR) light mediated reversible addition–fragmentation chain transfer (RAFT) polymerization. In the process of polymerization, the surface growth of polymer brushes was realized through an efficient in situ ligand exchange between a photo-activated chain transfer agent (CTA) and the ligand groups on the surface of UCNPs. BF4− was found to be the most efficient ligand in comparison with oleic acid and pyridine. The 980 nm NIR-mediated RAFT polymerization exhibits good temporal control with a low dispersity (Mw/Mn < 1.30), and the thickness of the polymer brushes can be easily adjusted by changing the polymer molecular weight and light exposure time. Moreover, the growth of polymer brushes can proceed even if there is a barrier (e.g. chicken skin) outside the reactor due to the excellent penetration ability of the NIR light.
- Subjects :
- chemistry.chemical_classification
Materials science
Polymers and Plastics
Ligand
Organic Chemistry
Dispersity
technology, industry, and agriculture
Bioengineering
Chain transfer
02 engineering and technology
Raft
Polymer
010402 general chemistry
021001 nanoscience & nanotechnology
Polymer brush
01 natural sciences
Biochemistry
0104 chemical sciences
Polymerization
chemistry
Chemical engineering
Reversible addition−fragmentation chain-transfer polymerization
0210 nano-technology
Subjects
Details
- ISSN :
- 17599962 and 17599954
- Volume :
- 12
- Database :
- OpenAIRE
- Journal :
- Polymer Chemistry
- Accession number :
- edsair.doi...........176f29545f2854a74687f848085ee00d