Physico-mechanical properties and durability of thermally modified malapapaya [polyscias nodosa (blume) seem.] wood

Abstract

The study investigated the use of thermal modification to improve physico-mechanical properties and decay resistance of Malapapaya [Polyscias nodosa (Blume) Seem.] wood. Results showed that wood properties were altered with exposure to high temperature and long treatment duration. Wood color changed from light yellowish brown to very dark brown with increasing treatment temperature. No defects due to heat treatments were observed. Treatments resulted in improved dimensional stability as indicated by the reduction in water absorption and thickness swelling of treated materials. Decay resistance against white rot [Fomes lividus (Kalchbr.) Sacc] and brown rot [Lenzites striata (Swartz ex Fries)] fungi improved significantly at the highest treatment combination of 220° C-120 minutes. Mechanical properties as measured by modulus of rupture and toughness were significantly reduced.

Source or Periodical Title

Philippine Journal of Science

ISSN

317683

Page

13-23

Document Type

Article

Subject

Decay fungi, Dimensional stability, Durability, Malapapaya, Physico-mechanical properties, Thermally modified wood

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