Cellulose coating on Poly (Ethylene Terephthalate) yarn

Nowadays, Polyethylene terephthalate (PET) yarn are replaced by cotton yarn because they are cheaper than cotton yarn. However, some cellulose properties such as high Glass transition temperature (TG) and moisture absorption are among important features of cellulose that plastic yarn lacks. Molding and blending are usual techniques but decline mechanical properties. Therefore, in this research, the surface of artificial polymer was grafted with viscose and coated with cellulose. For PET coating in the first method, the surface of polymer was hydrolyzed by dipping in the H2SO4 85% solution, and then the product was grafted with cellulose by dipping in the viscose cellulose solution. In this method viscose cellulose was prepared with Ethylene diamine, and Cu (OH) 2.  In the second method, PET was first placed in a solution of H2SO4 85%, then was placed in a viscose cellulose solution that had been prepared by NaOH 50% and CS2. In the third method, the surface of polymer was hydrolyzed by NaOH solution and coated surface of polyester with paste of cellulose that included Ethylene glycol and urea. (FT-IR) were used to study properties of PET-graft-Cellulose fibers. The result of FT-IR exhibits coupling between PET and cellulose was accomplished and the first method is a better adhesive.