Research on the Properties of Salix discolor Branch of Its Scrimber

The test chose Salix discolor as material to study the influence of Salix discolors branch pH, density, air shrinkage, surface contact angle and density, sizing use on scrimber physical and mechanical properties. The results showed that pH of Salix discolor branch was in the range of 643-646,being weak acidity. pH buffering capacity was 3463-3894mL. Ovendry shrinkage of Salix discolor branch material was 186, and airdried shrinkage was 191.The measurement result of surface tension tester showed that the MUF contact angle of outer surface was 54.52, and the inner surface was 3727.The results also show that, when the density was 090g/cm3, glue consumption wa 14%, hotpressing temperature 160℃,hotpressing time 20 min and the moisture content was 6%, elasticity modulus of Salix discolor scrimber was 12948.68 MPa, up to standard of GB/T 48977—2003. Besides, the static bending intensity was 10508MPa, the internal bonding strength was 207MPa and the thickness swelling rate after 2h water soaking was 349%,which up to industry standard of LY/T 1984—2011.SEM image showed that the syrinx of scrimber was compressed into ovalization by MUF press, but cytoderm kept a integrity.Infrared spectroscopy test showed that both Salix discolor cellulose and hemicellulose reacted with adhesive, and there were chemical bonds.