To determine how structural and
chemical factors of the hemicelluloses as well as its co-operation with lignin
affects the elastic properties of the matrix cell wall material. With more
reliable values of elastic properties of native hemicelluloses within the fiber
cell wall matrix material of lignin and hemicelluloses, a better understanding
of the role of the hemicelluloses can be obtained.
mechanical properties of the hemicelluloses in the wood fiber have been very
sparsely studied. Even on dissolved hemicelluloses studies of mechanical
properties are very limited, the only existing data being those of Cousins. In
order to be able to model the fiber wall properties in the transverse direction
the value of the hemicellulose stiffness must be better determined. The effect
of water is also very important for the hemicellulose properties, therefore the
moisture sorption behaviour for different hemicelluloses is needed to
understand how the fiber wall properties are affected.