Patent Number: 7,820,009

Title: Cellulose composites comprising hydrophobic particles and their use in paper products

Abstract: Polymer composite films were prepared by solvent casting suspensions of quantum dots (QDs) in cellulose triacetate (CTA) solution. The films were robust and possessed the optical properties characteristic of QDs. Transmission electron microscopy (TEM) images of the films revealed that the QDs were well dispersed within the CTA film matrix. The selective alkaline hydrolysis of QD/CTA films in 0.1N NaOH over 24 hours resulted in the surface conversion of CTA to regenerated cellulose. Optical properties of the films were probed both before and after the hydrolysis reaction using fluorescence spectroscopy, and were found generally unaltered. The cellulose surfaces of the alkaline treated films allow for facile incorporation of the films into paper sheets.

Inventors: Gray; Derek (Montreal, CA), Abitbol; Tiffany (Montreal, CA)

Assignee: The Royal Institution for the Advancement of Learning/McGill University

International Classification: D21H 17/00 (20060101); D21H 21/30 (20060101)

Expiration Date: 2018-10-26 0:00:00