Relation between moisture sorption and hygroexpansion of sitka spruce during adsorption processes

Erni Ma, Tetsuya Nakao, Guangjie Zhao, Hiroshi Ohata, Susumu Kawamura

Research output: Contribution to journalArticle

1 Citation (Scopus)


Moisture adsorption processes carried out in successive steps at three increasing levels of RH (45, 75, 85%) at 20°C for Sitka spruce (Picea sitchensis Carr.) were studied. Moisture content and dimensional changes in radial and tangential directions of the specimens were measured and it was found that moisture changes were slower than dimensional. The modeling on this moisture-dimensional relationship, based on the idea of dividing sorbed water into two components having different effects on dimensional changes, not only shows a good agreement with experimental results, but also presents a new understanding of the mechanism of hygroexpansion of wood.

Original languageEnglish
Pages (from-to)304-309
Number of pages6
JournalWood and Fiber Science
Issue number3
Publication statusPublished - Jul 1 2010
Externally publishedYes


All Science Journal Classification (ASJC) codes

  • Forestry
  • Materials Science(all)

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