Hygromechanical behavior of hemicellulose and s2 cell wall layer of wood

Abstract eng:
Molecular dynamics (MD) simulations are conducted to investigate arabinoglucuronoxylan (AGX), one of the major hemicellulose in softwood. Mechanical tests and structural analyses reveal that mechanical weakening happens with the increasing of moisture content until saturation point, due to the loss of interpolymer hydrogen bonds. Thermal softening and glass transition temperature are also discussed. These results will help improve our atomic model of wood cell wall S2 layer to unravel the underlying mechanism of hygromechanical behaviour of wood cell wall.

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