Siloxanes and methods of synthesis thereof using metallic nanoparticle catalysts

Reference Number: K 03-11

Inventors: Prasad, Bhagavatula L. V.; Stoeva, Savka; Klabunde; Kenneth J.; Sorensen, Christopher

Owner: Kansas State University Research Foundation

USPTO Link: 7244799

Invention Summary

The present invention provides a new class of siloxanes having unique nanoscale structures heretofore unknown in the art. The new siloxanes are in the form of bodies having discrete, observable structures with at least one dimension thereof having the maximum value of up to about 200 nm. The bodies are usually elongated in nature, and are typically in the form of wires, tubes, filaments or coils. The siloxanes are made up of repeating O--Si--O moieties or monomers forming a backbone with substituents bonded to the Si atoms. The siloxane products of the invention can be used in many contexts where conventional siloxanes are commonly employed, such as in the formation of sealing products and products having high electrical resistivity. In addition, the siloxanes have excellent thermal insulative properties. The siloxanes may also be used as oxidation precursers in the production of nanoglass fibers, tubes and coils.

The invention also provides new methods for preparing the siloxanes in good yield and moderate reaction conditions. Broadly speaking, the methods involve preparing siloxanes wherein corresponding alkyl silanes are polymerized in an aqueous solvent system, and in the presence of an effective amount of a nanoparticle metallic catalyst.