Matching Exercises-4.2

Hydroxyl Groups & Water Absorption (Hydroxyl groups in wood’s polymers, particularly hemicelluloses, are the primary sites where water molecules form hydrogen bonds during absorption.)

Swelling Anisotropy & Radial vs Tangential (Wood swells more in the tangential direction than in the radial direction due to differences in cell wall structure and alignment of fibers.)

Sorption Hysteresis & Mechanical Stress (Sorption hysteresis can be influenced by mechanical stress, where wood’s internal forces affect how it absorbs and releases moisture.)

Maximum Cell Wall Moisture Content & Bound Water Capacity (The maximum cell wall moisture content refers to the amount of bound water that wood can hold within its cell walls before capillary water starts filling the voids.)

Glass Transition & Polymer Softening (When wood absorbs enough water, its amorphous polymers like hemicelluloses undergo a glass transition, softening and becoming more flexible.)

Capillary Action & Porous Structure (Capillary action in wood’s porous structure allows water to move through small voids, driven by adhesive forces between water and wood surfaces.)

Thermodynamic Sorption & Enthalpy of Sorption (Thermodynamic sorption studies in wood involve measuring the enthalpy of sorption, which quantifies the heat released when water vapor is absorbed into the wood.)

Desorption Isotherm & Scanning Desorption (A desorption isotherm describes moisture release from wood, while scanning desorption refers to the specific curve obtained when desorbing from less than full saturation.)

Capillary Water & Kelvin Equation (The Kelvin equation explains the equilibrium state of capillary water in small voids, showing how water condenses at high relative humidity within wood’s porous structure.)

Moisture-Induced Shrinkage & Microfibril Deformation (Shrinkage of wood due to moisture loss causes deformation of the cellulose microfibrils within the cell walls, influencing the overall dimensional changes.)