1. Aim of projet: to study multiscale
Chemical force microscopy for measuring the interactions between cellulosic oligomers
B. Manship1,2,3, F. Ferry1,2,3, C. Roux4,5, M. Terrien1,2,3, C. Sillard1,2,3, F. Dubreuil4,5, R. Passas1,2,3
Introduction
Paper is made up of a network of interconnected ligno-cellulosic fibres. During the paper making process fibres undergo a combination of high levels of humidity, pressure and heat to create strong inter-fiber bonding. The mechanical properties of paper rely mostly on1:
the mechanical properties of the fibres within the paper2
the level of inter-fiber bonding3,4
The present research focuses on paper repair mechanisms. Importance of studying parameters affecting inter-fiber bond creation, especialy adhesive forces between cellulosic materials.
Aim of projet: to study multiscale
interactions by AFM
Measurements
From oligomer and model surfaces to fiber/fiber interactions
Tip/surface
Chemistry for
functionnalization
Fibers immobilization
Contact force applied
Tip/substrate adhesion
Energy dissipation
Tip without functionalization
curvature radius 11 nm
Maltoheptaose functionalized tip curvature radius 41 nm
Bending stiffness
Raw data
Force spectroscopy curve
Promissing results
Interactions parameters
Topographical and force mapping for a cotton fiber using a maltoheptaose functionalised tip :
Adhesion Force (nN)
Tip size (curvature radius) and chemistry
Humidity level
Need of an environement cell => poster
Contact Time
Local roughness
Humidity level (%)
Acknowledgements References
This work was conducted within
the CellAdher project supported
by the PolyNat Carnot Institute
1 Papermaking science and technology. 16, Paper physics, ed. Kaarlo Niskanen
2 Manship et al., (unpublished). Testing of flexibility and transverse compressibility of individual wood fibres using a micro robotic tool
3 Fischer et al., Nordic Pulp and Paper Research Journal, 27(2):
4 Schmied et al., Review of Scientific Instruments, 83(7)
1Univ. Grenoble Alpes, LGP2, F Grenoble, France 2CNRS, LGP2, F Grenoble, France
3Agefpi, LGP2, F Grenoble, France
4Univ. Grenoble Alpes, CERMAV, F Grenoble, France 5CNRS, CERMAV, F Grenoble, France