Abstract
In the conventional PVA composites reinforced by cellulose nano fibers (CNF) obtained by film casting, it is considered that resin rich layer is formed because of differences in their densities. This research aims to increase the strength of the composite material by preventing the formation of a resin rich layer using a CNF sheet as a reinforcing material. A method for manufacturing composite materials is proposed introduced where CNF sheet was soaked in PVA solution, dried and hot pressed to fabricate the composite sheet. On top of that, the CNF sheet was directly soaked in PVA solution without being dried after filtration (named as composite A). The tensile strength of conventional PVA/CNF composite was 113 MPa, whereas the tensile strength of composite using CNF sheet was 154 MPa and composite A was 178 MPa. From these results, the high strength of composite material is achieved by using CNF sheet.
