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Cellulose Nanocrystals Chemically Entrap Biocide in Wood

Photo of Sequential vacuum treatment of southern pine with naturally occurring cellulose nanocrystals followed by biocide demonstrated penetration of wood before agglomeration occurred (left), but reversing the treatment sequence resulted in agglomeration  on the surface of southern pine (right). USDA Forest ServiceSequential vacuum treatment of southern pine with naturally occurring cellulose nanocrystals followed by biocide demonstrated penetration of wood before agglomeration occurred (left), but reversing the treatment sequence resulted in agglomeration on the surface of southern pine (right). USDA Forest ServiceSnapshot : Can cellulose nanomaterials play a role in the development of novel preservatives to protect wood products from biodeterioration?

Principal Investigators(s) :
Clausen, Carol A.Yang, Vina
Arango, RachelHasburgh, Laura, E.
Lebow, Patricia K.Reiner, Richard
Research Location : Forest Products Laboratory, Madison, WI
Research Station : Forest Products Laboratory (FPL)
Year : 2015
Highlight ID : 888

Summary

Forest Service scientists evaluated naturally occurring cellulose nanocrystals (CNC) that are reported to have unique chemical properties and impart high strength were evaluated for the potential to improve durability of wood. CNC were shown to penetrate wood and chemically bind to an otherwise leachable biocide, benzalkonium chloride (ADBAC), creating a CNC-biocide hybrid that agglomerated within wood. Biological and chemical analysis of southern pine treated with the CNC-biocide hybrid did not appreciably alter resistance to fungal colonization, termite attack, or chemical leaching. There were no significant changes to strength properties or mass loss during combustion to southern pine treated with the CNC-biocide hybrid.

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