Liquid penetration in different cells of two hardwood species |
| |
Authors: | Sheikh Ali Ahmed Su Kyoung Chun Regis B Miller Song Ho Chong Ae Ju Kim |
| |
Institution: | (1) Department of Wood Science & Engineering, College of Forest and Environmental Sciences, Kangwon National University, Gangwon-do, Chuncheon, 200-701, Republic of Korea |
| |
Abstract: | Two experimental techniques were used to test the water permeability of two Korean hardwood species: diffuse porous Populus tomentiglandulosa T. Lee (eunsasi poplar) and ring porous white oak, Quercus serrata Thunb (konara oak). The first technique measured the void volume filled at different moisture content (MC) levels. Samples
were treated with water via a schedule of full-cell impregnation. A significant relation between MC and permeability (the
fractional void volume) was found. A reduction in liquid permeability was observed at MC above the fiber saturation point
(FSP), whereas the opposite result was observed at MC below FSP due to the effect of the voids available in the wood. However,
the differences of increased permeability from MC level 20% to 0% were found satistically the same in either wood species.
The second technique measured the speed of liquid penetration in vessels, fibers, and rays with no application of external
pressure. In this method, liquid flow was captured via video and the penetration speed was measured. Vessels, fibers, and
rays in poplar were found to be more permeable than those in oak. Different anatomical factors such as cell diameter, cell
length, pit number, pit aperture area, and thickness of the pit membrane seemed to be responsible for the variation of liquid
flow rate in different cells of the two hardwood species. |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|