Delamination of Wood at the Microscopic Scale: Current Knowledge and Methods

  • Lloyd Donaldson


At the microscopic level, wood delamination can be defined as the separation or disintegration of fibres as a result of physical or chemical processes resulting in fracturing. Wood shows complex anisotropic behavior related to its microscopic structure, and this is also reflected in its fracture behaviour (Figs. 6.1 and 6.2). Delamination of wood can occur by intrawall fracture between adjacent tracheids or fibres, or in association with rays, or less commonly by transwall fracture, where the cell lumen is exposed (Koran 1967, 1968; Jeronimidis 1976; Kucera and Bariska 1982; Boatright and Garrett 1983; Côté and Hanna 1983; Zink et al. 1994; Donaldson 1997) (Figs. 6.2 and 6.3). Interwall fracture is a special case of intrawall fracture that occurs within the middle lamella (Côté and Hanna 1983; Zink et al. 1994).


Secondary Wall Cellulose Microfibril Compression Wood Tension Wood Middle Lamella 
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Authors and Affiliations

  1. 1.Bioproduct DevelopmentScion - Next Generation BiomaterialsRotoruaNew Zealand

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