Dimensional stability of high temperature-dried rubberwood solid lumber at two equilibrium moisture content conditions

Huei Shing Sik, Kheng Ten Choo, Sarani Zakaria, Sahrim Ahmad, Seok Sean How, Chin Hua Chia, Maisarah Yusoff

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

Commercial drying of rubberwood at high temperatures is still unknown. Freshly sawn rubberwood lumber was dried at 130°C from a green condition in a commercial-size prototype kiln. The dimensional stability of high temperature-dried rubberwood was determined in this study. The high temperature-dried and conventional temperature-dried (for control) rubberwood dimensional lumber with moisture content of 6-8% after drying was exposed to two equilibrium moisture content conditions in a conditioning chamber, with constant humidity-temperature settings at 30°C, 60% relative humidity (RH) and 30°C, 90% relative humidity. In both conditions, the high temperature-dried rubberwood was found to equilibrate at lower equilibrium moisture content than the control. The moisture exclusion efficiency of high temperature-dried rubberwood against the controls was respectively 24.20% (30°C, RH 60%) and 13.12% (30°C, RH 90%) during the adsorption process. X-ray diffraction analysis showed that the cellulose crystallite size of high temperature-dried rubberwood increased compared to conventional temperature-dried rubberwood.

Original languageEnglish
Pages (from-to)1083-1090
Number of pages8
JournalDrying Technology
Volume28
Issue number9
DOIs
Publication statusPublished - 2010

Fingerprint

dimensional stability
Lumber
Dimensional stability
moisture content
Moisture
humidity
Atmospheric humidity
Temperature
drying
Drying
conditioning
exclusion
cellulose
moisture
temperature
chambers
prototypes
Kilns
Crystallite size
Cellulose

Keywords

  • High-temperature drying
  • Hygroscopicity
  • Relative humidity
  • X-ray diffraction analysis

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Physical and Theoretical Chemistry

Cite this

Dimensional stability of high temperature-dried rubberwood solid lumber at two equilibrium moisture content conditions. / Sik, Huei Shing; Choo, Kheng Ten; Zakaria, Sarani; Ahmad, Sahrim; How, Seok Sean; Chia, Chin Hua; Yusoff, Maisarah.

In: Drying Technology, Vol. 28, No. 9, 2010, p. 1083-1090.

Research output: Contribution to journalArticle

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