Preliminary Research On Effects Of Air-compressed Explosion Treatment On The Permeability And Mechanical Property Of Poplar

Poplar is one of the main materials of wood-processing industry, possessing the characteristics of long growth period yearly, fast growth rate, widely adaptability, low cost and so on. It has abundant resources and widely planted in china. The rational development and utilization of resources of fast-growing poplar can effectively solve the problem of wood resources shortage, providing the sufficient raw materials for wood-processing industry. However, most of process of wood working closely related to the permeability, so in order to further improve the use value of poplar, more and more researches based on poplar modification was made.This article adopts air-compressed explosion under normal temperature treating on poplar (populus simonii Carr.), studying on its permeability, mechanical properties, microstructure observation etc and making comparative study. The experimental results are as follows:Lit showed that the permeability after air-compressed explosion treatment was higher than that of untreated one. Initial moisture content and pressure had much react on permeability but explosion times not.2.Microscopic structure had different degrees of change. It showed that the lumen of treated wood appearing rupture, fold, salient, even exfoliated, and the pit torus of bordered pit became camber or completely exfoliated, parts of thylose was destroyed. There were certain degree influence at different explosion depth, pits on the structure between surface and center part of treated materials got larger and deeper destroy than pits on the surface and center part.3.On proper conditions, the bending strength and elastic modulus of treated poplar wood has no significant change.