Rensselaer Polytechnic Institute

Medical University of South Carolina

Ying Li

Brian C Benicewicz

Richard W Siegel

Robert F Karlicek

Peng Tao

Anand Viswanath

Lei Wang

Linda S Schadler

Linda S Schadler Feist

Linda Schadler Feist

Chaitanya Ullal

Charles S S Goodwin

The present disclosure relates to a matrix-free polymer nanocomposite. The matrix-free polymer nanocomposite includes a plurality of polymer brush grafted nanoparticles, which form the nanocomposite in the absence of a polymeric matrix. The polymer brush grafted to the nanoparticles comprises a multimodal brush configuration having at least two different populations of polymer ligands of different lengths. The present disclosure also relates to an optic or optoelectronic component comprising a matrix-free polymer nanocomposite as described herein. The present disclosure further relates to a method of making a matrix-free polymer nanocomposite.

Matrix-free polymer nanocomposites and related products and methods thereof

Provided is a phosphor-functionalized nanoparticle that includes an inorganic nanoparticle core; surface polymer brushes that include a plurality of long-chain polymers bonded to the surface of the inorganic nanoparticle core, said long-chain polymers each having molecular weight greater than 500, and a plurality of short-chain polymers bonded to the surface of the inorganic nanoparticle core, said short-chain polymers each having molecular weight less than 0.5 times the average molecular weight of the long-chain polymers; and one or more organic phosphors bonded to at least one of the inorganic nanoparticle core and one or more of the plurality of short-chain polymers. Graft density of the short-chain polymers on the surface of the inorganic nanoparticle core (&#x3c3;) is greater than graft density of the long-chain polymers on the surface of the inorganic nanoparticle core (&#x3c3;). Also provided are polymer matrices, LED's, optical systems, lighting devices, and fixtures that include the inventive nanoparticle.

Organic phosphor-functionalized nanoparticles and compositions comprising the same

Silicone-based nanocomposites that include a plurality of multimodal nanoparticles dispersed within a silicone-based polymeric matrix are provided. Each of the multimodal nanoparticle has a first plurality of long silicone compatible polymeric chains and a second plurality of short silicone compatible polymeric chains grafted onto a surface of a nanoparticle (e.g., an inorganic nanoparticle, such as silica, alumina, titania, indium tin oxide, CdSe, etc.), with the short silicone compatible polymeric chains present on each multimodal nanoparticle at a higher grafting density than the long silicone compatible polymeric chains. Methods are also provided for forming a silicone-based nanocomposite.

Silicone based nanocomposites including inorganic nanoparticles and their methods of manufacture and use

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Troy, NY, United States of America

Ying Li