Wood polysaccharides - Structure

7 Novembro 2025, 11:15 • José Afonso Rodrigues Graça

Polysaccharides as the main constituents of wood and biomass

Polysaccharides building units: sugars (monosaccharides)

Asymmetric carbons and configuration in sugars

Sugars in the cyclic form: pyranose and furanose rings

Conformation and energy stability

Cellulose: linearly linked b-D-Glucopyranose units

Hemicelluloses: small chain, branched polysaccharides

Xylans in Hardwoods and Glucomannans in Softwoods

The cellulose crystal

Cellulose organization in wood cell walls: microfibrils

Orientation of microfibrils in wood cell walls

 

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Miderm test

6 Novembro 2025, 11:15 • José Afonso Rodrigues Graça

Midterm test on wood and fiber-based materials, including wood composites and engineered wood products

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Wood and wood-based composites and materials – Review (2/2)

24 Outubro 2025, 11:15 • José Afonso Rodrigues Graça

Wood and wood-based composites and materials – Review, questions and study topics (2/2)

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Wood and wood-based composites and materials – Review (1/2)

23 Outubro 2025, 11:15 • José Afonso Rodrigues Graça

Wood and wood-based composites and materials – Review, questions and study topics (1/2)

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WPC and Densified wood

17 Outubro 2025, 11:15 • José Afonso Rodrigues Graça

Wood-plastic composites (WPCs): properties and uses

Production of WPCs by extrusion

Densified wood: properties and uses

Densified wood as a structural material

The Thermo-hydro-mechanical process

Stages of wood densification

Surface densification

Laminated densified wood: properties and uses

Chemical modification and Densification

Transparent wood

 

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