2003 Fiscal Year Final Research Report Summary
Shrinkage stress of wood during drying under superheated steam and its mechanism
| Project/Area Number |
14560135
|
|---|
| Research Category |
Grant-in-Aid for Scientific Research (C)
|
| Allocation Type | Single-year Grants |
|---|
| Section | 一般 |
|---|
| Research Field |
林産学
|
|---|
| Research Institution | KYOTO UNIVERSITY |
|---|
Principal Investigator |
MOROOKA Toshiro KYOTO UNIVERSITY, Wood Research Institute, Associate Professor, 木質科学研究所, 助教授 (00192378)
|
|---|
| Co-Investigator(Kenkyū-buntansha) |
NORIMOTO Misato KYOTO UNIVERSITY, Wood Research Institute, Professor, 木質科学研究所, 教授 (20027163)
|
|---|
| Project Period (FY) |
2002 – 2003
|
| Keywords | Wood / drying stress / shrinkage stress / su / superheated steam / Viscoelasticity / compressive deformation / chemical analysis |
|---|
| Research Abstract |
In order to reduce the internal stress of wood during drying, an attempt was made to dry wood with superheated steam above 100℃. Sugi (Cryptomeria japonica D.Don) wood specimens were dried with radial restraint using superheated steam at up to 180℃ and the resulting restrained shrinkage stress was examined. A load cell capable of measuring shrinkage stress inside an autoclave was developed and the shrinkage stress was measured at temperatures from 80 to 180℃ and a relative humidity of 0 to 80%. It was found that the shrinkage stress decreased dramatically with drying above 140℃ and above 60 percent relative humidity. It was also found that the shrinkage stress above 140℃ occurred even at 100%RH and was ascribed to the structural change of cell wall components.
|
Research Products
(11 results)
