Araştırma Makalesi (Research Article)

Plywood Treated with Didecyl Dim ethyl Am m onium Tetrafluoroborate (DBF) and Didecyl Dim ethyl Am m onium Chloride (DDAC): M eclıanical Properties and Biological Resistance


Forestry Facultylstanbul University Bahcekoy 34473, İstanbul, Turkey


Forestry Faculty İstanbul University Bahcekoy 34473, İstanbul, Turkey


Institute of Wood Technology Akita Prefectural University Akita 016-0876, Japan


Phamıaceııtical and Cosmetic Materials Research Department Sanyo Chemical Industries, Ltd., Kyoto, Japan


Laboratory oflnııovative Humano-habitability Research Institute for Sustainable Humanosphere Kyoto University Uji, Gokasho 611-0011 Kyoto, Japan

FORESTIST 2008; 58: 37-51
DOI: 10.17099/jffiu.60156
Read: 866 Downloads: 552 Published: 01 January 2008

This study evaluated decay and termite resistance of plyvvood panels treated \vith didecyl dimethyl ammonium tetrafluoroborate (DBF) and didecyl dimethyl ammonium chloride (DDAC) as quaternary ammonia compounds. Meclıanical properties and bonding quality of treated plyvvood specimens were also tested. The modulus of rupture (MOR) values of botlı DBF- and DDAC-treated plyvvood specimens fulfılled minimum requirements for plyvvood F25-F30 (38-45 N/mm2) set by the EN standards. The modulus of elasticity (MOE) of DDAC-treated plyvvood specimens decreased vvhen compared vvith DBF-treated and untreated plyvvood specimens. The bonding quality values of ali specimens did not meet the requirements set by the TS standards. The results suggest that DBF and DDAC may decrease meclıanical properties by possible interaction vvith the glue and vvood components depending on botlı clıemical structure and retention levels in treated plyvvood specimens. Decay resistance tests shovved that DBF-treated plyvvood specimens vvere more resistant against the fungi tested vvhen compared vvith those of DDAC treated; hovvever, both DBF and DDAC had no protective effect against termite attack.

EISSN 2602-4039