Loss of tensile strength in cellulose tissue on the surface of spruce (Picea abies) caused by natural photodegradation and delignification

Thomas Volkmer, L. Arietano, C. Plummer, J. Strautmann & Marion Noël
Photodegradation of wood leads to discolouration and delignification, inducing damage to the cellular structure. This study is an investigation of the damage and loss of tensile strength of the cellulose fibres in spruce (Picea abies). Microtensile tests in the longitudinal direction on 250-μm-thick microtomed samples were performed on undegraded and degraded spruce specimens. The tested length of the samples for the first series was 10 mm (t-span) to evaluate the entire wood composite degradation process...
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