Nanoparticles grafting-from approach, 141

The BST nanoparticles were modified by the grafting from approach. The nanoparticles were first activated by acrylic acid, so the nanoparticle surface was modified with functional groups by the reaction between the molecule and particles. Then, the PS molecule began the polymerization processes via radical polymerization, so PS was grafted onto Bao.sSro.sTiOs nanoparticles. The mode of preparation of PS-grafted Bao.sSro.sTiOs nanoparticles is shown in Fig. 6. 

Figure 6.29 Graft-from approach to micellar nanoparticles via ROMP, M = Ru or Mo catalyst, X = reactive group, Y = moiety for conjugation, and I = initiator for polymerization.

Scheme 5 Grafting-from approach employed to introduce polymer brushes onto the surface of a nanoparticle via SI-ATRP...

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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