Lignin Use in Wood Adhesive
Lignin is an important building block of biomass as agricultural residues and forest produce. Lignin has a high calorific value and can be used as fuel in a combustion process. Lignin is also of interest in other applications such as concrete aggregates and the production of other chemicals.
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Lignin is also known as wood adhesive
Lignin is an important building block in biomass from our forest and agricultural reserves. Lignin joins up the fibres in the wood, that is, it makes the wood stiff. Lignin is found in high concentration in a layer called the middle lamella. It consists mainly of a very complex structure of phenylpropane, and not of sugar units. The lignin is brown in colour, which is clearly visible if rot has attacked and destroyed the light cellulose, which is wholly or partially embedded in the lignin. The wood remains are then brown. Hardwood/deciduous wood contains less lignin, which is also a different type of lignin, than that in coniferous/softwood. 25-30% of the wood comprises lignin.
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