uu.seUppsala University Publications
Change search
ReferencesLink to record
Permanent link

Direct link
Characterization of interfacial stress transfer ability of particulate cellulose composite materials
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Applied Mechanics.
2011 (English)In: Mechanics of materials (Print), ISSN 0167-6636, Vol. 43, no 11, 693-704 p.Article in journal (Refereed) Published
Abstract [en]

Composites with cellulose reinforcements are steadily gaining increased use. The stress transfer ability between reinforcement and polymer matrix has a strong influence on mechanical properties like strength and fracture toughness. This work presents a method to assess the stress transfer ability between cellulose and polymer matrix from a model material with cellulose spheres embedded in a polymer matrix. Such a material show smaller variability compared with composites based on natural cellulose fibres, and is less cumbersome than single fibre tests with regard to interfacial characterization. Measured elastic moduli of particulate composites is compared with predicted values from a micromechanical model based on a composite sphere assembly in a self-consistent scheme with only a spring constant of an imperfect interface as fitting parameter expressed in Pa/m. This interface parameter is identified through inverse modelling and used to quantify stress-transfer ability of cellulose/polylactide and cellulose/polystyrene composite interfaces. A higher degree of interfacial interaction was found for the former. This ranking was corroborated by adhesive force measurements using a micrometre sized cellulose sphere attached to the end of a cantilever in an atomic force microscope. With the model microstructure of a cellulose-sphere composite, an interfacial efficiency parameter can be backed out from stiffness measurements to be used in e.g. ranking of different fibre surface treatments and choice of matrix in the development of stronger natural-fibre composites.

Place, publisher, year, edition, pages
2011. Vol. 43, no 11, 693-704 p.
Keyword [en]
Interfaces, Stress transfer, Composite material, Cellulose spheres, Micromechanics, Adhesion
National Category
Applied Mechanics
URN: urn:nbn:se:uu:diva-163272DOI: 10.1016/j.mechmat.2011.06.015ISI: 000297000900006OAI: oai:DiVA.org:uu-163272DiVA: diva2:463456
Available from: 2011-12-09 Created: 2011-12-09 Last updated: 2011-12-14Bibliographically approved

Open Access in DiVA

No full text

Other links

Publisher's full text

Search in DiVA

By author/editor
Gamstedt, E. Kristofer
By organisation
Applied Mechanics
In the same journal
Mechanics of materials (Print)
Applied Mechanics

Search outside of DiVA

GoogleGoogle Scholar
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Altmetric score

Total: 433 hits
ReferencesLink to record
Permanent link

Direct link