A Numerical Model for Understanding the Development of Adhesion during Drying of Cellulose Model Surfaces

Area of Science:

• Materials Science
• Biocomposites
• Cellulose Science

Background:

• Adhesion is critical for mechanical properties in fibre-network materials like paper.
• Fibre-fibre joint strength develops during drying, enabling stress transfer.
• Model surfaces simplify studying adhesive strength by isolating variables.

Purpose of the Study:

• To develop a numerical model for cellulose bead-rigid surface adhesion during drying.
• To investigate the influence of moisture diffusion, hygroexpansion, and cohesive surfaces on adhesion development.
• To analyze the impact of cohesive and material parameters on contact area.

Main Methods:

• Utilized an axisymmetric numerical formulation.
• Incorporated moisture diffusion, hygroexpansion, and cohesive surface models.
• Calibrated model parameters against experimental contact and geometry data.

Main Results:

• The numerical model successfully replicated observed adhesion behavior.
• Parameter study revealed the influence of cohesive and material properties on contact area.
• The model provides a tool for studying stress development during drying.

Conclusions:

• The developed model accurately simulates cellulose adhesion development.
• It offers a platform for further research on model surfaces and adhesion quantification.
• This work advances understanding of joint strength in cellulose-based materials.