Patent ID: 7922929

Claim:
A method of making a coated substrate, comprising the steps: preparing a silk peptide with a particle size of from 50 to 250 nm by degumming silk fiber, and dissolving the silk fiber in an organic solvent; adding said peptide to a treated bath containing a building block polymer having a particle size of from 50 to 500 nm; polymerizing said peptide with said building block; and applying the peptide/building block polymer to a cellulosic substrate, wherein the building block is a soft segment that is selected from the group consisting of silicon-oxygen backbone polymers, amino amide derivatives, imidazoline, alkyl aryl sulphonate, thermoplastics, ethylene oxide, aminoethylamine propylsiloxone, and dimethyl siloxone, and wherein the ratio of said peptide to said soft segment is from about 4:1 to about 10:1.