PMSE 68 |
| Magnetic tape, wherein ferromagnetic nanoparticles are dispersed within a polymer binder, is a relatively cheap source of long term and archival disk storage. In its ideal form, the nanoparticles are dispersed evenly (at a high density) within a polymer matrix. We have developed a general supramolecular strategy for creating nanoparticle dispersions within a robust polymer binder. Nanoparticles have been encapsulated with silica shells, which were subsequently functionalized with molecular recognition elements (such as carboxylates). Urea functionalities were then incorporated into poly(arylether) ketones to interact with the carboxylate-coated particles in a complementary manner via hydrogen bonding working in concert with ion-dipole interactions. Both the silica shell around the nanoparticles and the poly(arylether) ketones provide a framework that offer stability to high temperatures (which may be necessary for processing the nanoparticles) and for the robustness of the material. This versatile approach is not only useful for magnetic particles, but also can be applied to other polymer-nanoparticle composites possessing these types of molecular recognition elements. |
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Synthesis and Self-Assembly Approaches to Polymer-Inorganic Hybrid Nanoparticles
8:30 AM-12:00 PM, Monday, April 7, 2008 Hilton New Orleans Riverside -- Grand Salon 24, Oral
Division of Polymeric Materials: Science & Engineering |