Grafting micellar nanoparticles

Figure 6.1 Graft-through approach to micellar nanoparticles via ROMP (M = Ru or Mo catalyst) and chemical structures of the most popular catalysts employed for ROMP.

Coram et al. [6] have described the polymer support as a soluble macromolecule or a micellar aggregate that wraps the metal nanoparticle in solution, thus preventing metal sintering and precipitation. It can also be a resin, that is an insoluble material consisting in a bundle of physically and/or chemically cross-linked polymer chains in which the metal nanoparticles are embedded (Figure 11.2). Thus, soluble cross-linked polymers ( microgels ) that can stabilize metal nanoparticles can be prepared in addition, metal colloids protected by soluble linear polymers have been grafted onto insoluble resin supports to yield insoluble catalysts. This chapter is devoted mainly to metal nanoparticles on insoluble resin supports [8]. 

To expand the variety of monomers available for polymerization and to increase the range of copolymer and nanoparticle architectures, attention has turned toward the development of methods whereby multiple polymerization techniques can be utilized to generate unique and functionally diverse materials. The grafting-from (Figure 6.29) approaches to ROMP-based micellar... 

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