Surface-modified zirconia nanoparticles

摘要

Surface-modified zirconia nanoparticles include zirconia nanoparticles and surface-modifying ligands attached to the zirconia nanoparticles. The ligand includes a hydroxamate functionality, and either a reactive group or an oligomeric group. Reactive groups include chain transfer groups or photoinitiator groups. Oligomeric groups include poly(meth)acrylate or poly(meth)acrylamide groups. Articles can be prepared that include the surface-modified zirconia nanoparticles in an organic matrix.

主权项

1. Surface-modified nanoparticles comprising:
zirconia nanoparticles; and at least one ligand attached to at least one of the zirconia nanoparticles, the ligand comprising:
a hydroxamate functionality; anda reactive group comprising a chain transfer group or a photoinitiator group,wherein the ligand comprises the structure:
R1N(OH)(CO)-A-Xwherein R1 is selected from a hydrogen atom, an alkyl group, a cycloalkyl group, an aryl group, a heteroaryl group, an aralkyl group, a heteroaryl group, or a heterocycloalkyl group;(CO) is a carbonyl group C═O;A is a divalent linking group selected from alkylene, arylene, aralkylene, heteroalkylene, heteroarylene, or heteroaralkylene; andX is —SH or —(OC)—O—B—O—Ar—(CO)—C(OH)R22 wherein B is an alkylene group or arylene group;Ar is an aryl or substituted aryl group; andeach R2 is an alkyl group.