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Heat Treatment of Green Wood Accomplishes Crystal Hardening
Snapshot: After centuries of study, the structure of the woody cell wall remains poorly understood. Regarding cellulose crystals in green wood, X-ray methods demonstrate the repeating structure of a crystal, but Raman Spectroscopy methods reveal a high level of disorder within the crystal unit cell. Forest Service research demonstrates that with delignification (pulping) or heat treatments, the degree of disorder is decreased, resulting in a chemically robust crystal form in bleached pulps.
Cross-section of wood cell wall. U.S. Department of Agriculture Forest Service.