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Source: Wood and Fiber Science, 41(2), 2009, pp. 105-116

Author(s): Chen, George

Publication Year: 2009  View PDF »

Category: Journal Articles
Associated Research Project(s):   FPL-4707-1A

Abstract: Thermal condensation of glucose-diammonium phosphate in wood at 160 and 190 C will protect wood against fire and decay in one treatment using an aqueous system. For fire protection, treatments at 160 or 190 C led to low flammability as evidenced by fire-tube tests. For nonleached wood, weight losses were 1.9, 2.0, and 2.0% with chemical retentions of 56.7, 44.7, and 64.7%, respectively, for 2-, 4-, and 6-h heating; and for leached wood, weight losses of 5.1, 3.8, and 1.5% with chemical retentions of 24.5, 24.1, and 45.6%, respectively, for 2-, 4-, and 6-h heating compared with 18.8% weight loss for diammonium phosphate-treated wood with chemical retention of 19.4%. The control had 84.4% weight loss. For decay protection, heat treatment at 190C for 30 min after 2-wk water leaching also prevents degradation by brown and white rot fungi. Weight loss by Gloeophyllum trabeum (Gt) was 0.4% with 19.5% chemical retention, and weight loss by Trametes versicolor (Tv) was 1.5% with 17.8% chemical retention. The control had 30.6 and 36.8% weight losses by Gt and Tv, respectively.

Keywords: Dehydration, diammonium phosphate, fire and fungal decay protection, glucose, thermal condensation, wood, biodegradation, heat treatment, brown rot, leaching, fire testing, phosphorus compounds, wood-decaying fungi, fireproofing of wood, fireproofing agents, Gloeophyllum trabeum, Trametes versicolor, white rot, flammability, treated wood, resistance to decay, fire resistance, fire retardants, preservation, wood decay

File size: 566 kb(s)

Date posted: 06/26/2009

This publication is also viewable on Treesearch:  view
RITS Product ID: 29707

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