Raghuraman G K - Grafting of PMMA brushes on titania nanoparticulate surface via surface-initiated conventional radical and “controlled” radical polymerization (ATRP)

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      Publication Details (including relevant citation   information):

      JOURNAL OF   NANOPARTICLE RESEARCH

      Volume 10,   Number 3, 415-427, DOI: 10.1007/s11051-007-9268-9

      Abstract:

      Stable dispersion of titania nanoparticles in organic solvents   are obtained by grafting poly(methyl methacrylate) layer on to   the surface. Titania nanoparticles are synthesized through the   hydrolysis of titanium (IV) isopropoxide. The average size of the   titania particles is found to be 15 ± 2 nm. The polymer layer was   introduced onto the surface by immobilizing the initiating   moiety. Azo initiator moiety required for surface-initiated   conventional free radical polymerization and a tertiary bromide   initiator moiety required for ATRP are attached covalently to the   titania nanoparticulate surface through the surface hydroxyl   groups. The “encapsulation” of PMMA layer results in the steric   stabilization of the titania nanoparticles. Another important   finding is that it is possible to grow polymer layer in a   controlled fashion.

      Address (URL): http://www.springerlink.com/content/q0563u5344u51176/