Cellulose Nanofiber-reinforced Unsaturated Polyester as a Potential Substitute for Glass Fiber-reinforced Plastics.

摘要

Nanocomposites of unsaturated polyester (UP) reinforced with nanofibers obtained by applying shear stress to pulp fibers through extrusion were produced. Paper-like sheets of nanofibers were impregnated with UP, stacked in layers and hot pressed at 1.5 MPa, a compressing pressure typical of plywood manufacturing. When nanofibers extracted from needle-leaf unbleached pulp (NUKP) fibers were used, composites with 14 wt% UP content exhibited flexural modulus of 13.6 GPa and strength of 260 MPa, with an Izod impact strength of 38 kJ/m~2.