Journal
CELLULOSE
Volume 27, Issue 10, Pages 5815-5827Publisher
SPRINGER
DOI: 10.1007/s10570-020-03170-1
Keywords
Bio-based composites; Fatigue; Photo-polymerisation; Biomimetics; Regenerated cellulose
Funding
- Projekt DEAL
- Bundesministerium fur Wirtschaft und Energie [18059N]
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Based on the knowledge that plant structures often have graded stiffness transitions between strengthening elements and the surrounding matrix, which result in good damping behaviour and high toughness of the plant structure, the fatigue behaviour of composites made from rayon fibre and polypropylene (PP) as a matrix could be enhanced by photochemical surface modification of the regenerated cellulose fibres. The surface modification was achieved by deposition of UV-polymerized organic thin layers using pentaerythritol triacrylate (PETA) as the monomer. It has been shown earlier that the photochemical modification yields a decrease in wettability of the highly hydrophilic and water adsorbing viscose fibres and an increase in their affinity towards non-polar substances, thus promoting fibre-matrix adhesion. The presented experiments proved that the distinguished mechanical properties of the deposited layer structure also mimic the graded transition and provide good damping and fatigue behaviour superior to either untreated rayon/PP or rayon/maleic anhydride-modified PP composites.
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