Study on the Properties of Poplar Micro/Nanofibril and its Composites

Abstract

The micro/nanofibrils of poplar could be prepared by treatment of ultrasonic. The properties of micro/nanofibrils were characterized by using scanning electron microscopy (SEM) and X-ray diffractometer (XRD). The results indicated that poplar micro/nanofibril was the same as raw fiber in chemical compositions and crystal structure. The crystallinity of micro/nanofibrils was 84.99 percent, increased by 20 percent compared to original fiber after ultrasonic crushing. The micro/nanofibril diameter was from 50 nm to 1 μm.The internal bond strength (IB) of wheat-straw fiberboard could be significantly improved by adding poplar micro/nanofibril suspension to the urea formaldehyde resin adhesive(UF),when the adding amount of poplar micro/nanofibril suspension was 15wt percent, the IB of wheat-straw fiberboard was up to 0.86 MPa.