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Tribological and Nanomechanical Behavior of Liquid Wood
Linköping University, Department of Physics, Chemistry and Biology. Linköping University, Faculty of Science & Engineering. CNRS, France; Tecnosud Rambla Thermodynam, France; SKF Res and Technol Dev Ctr, Netherlands.ORCID iD: 0000-0003-3277-1945
Gheorghe Asachi Tech Univ Iasi, Romania.
Gheorghe Asachi Tech Univ Iasi, Romania.
CNRS, France; Tecnosud Rambla Thermodynam, France.
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2019 (English)In: Journal of tribology, ISSN 0742-4787, E-ISSN 1528-8897, Vol. 141, no 2, article id 022001Article in journal (Refereed) Published
Abstract [en]

During the last decades, there has been an increased interest in the use of lignin-based composites following the ideas of developing green materials for fossil-based raw materials substitution. The biopolymer Arboform is a mixture of lignin, plant fibers, and additives, which is nowadays successfully used in many applications. As a thermoplastic, it can be molded and is therefore also called "liquid wood." In this paper, we report a study comparing the nanomechanical and tribological properties of Arboform (AR), and Aramid-reinforced Arboform (AR-AF) composite biopolymers. The samples were produced in an industrial-scale injection molding machine. Nanoindentation experiments have revealed that, in both series of biopolymer samples, an increase in temperature or a change in the injection direction from 0 deg to 90 deg produces an increase in hardness. On the other hand, Youngs modulus is slightly affected by the increase in temperature, and not affected by the injection angle. Tribological characterization has shown that all samples, except the AR-AF injected at 175 degrees C, present noticeable wear and have a similar friction coefficients mu similar to 0.44-0.49 at Hertzian contact pressures p(0) between 90 and 130 MPa. Interestingly, the reinforced polymer produced at 175 degrees C shows no wear and low friction of mu similar to 0.19 at p(0)=90 MPa. Our results show that the reinforced Arboform biopolymers are a good candidate to replace other polymers in many mechanical and tribological applications.

Place, publisher, year, edition, pages
ASME , 2019. Vol. 141, no 2, article id 022001
National Category
Tribology (Interacting Surfaces including Friction, Lubrication and Wear)
Identifiers
URN: urn:nbn:se:liu:diva-153643DOI: 10.1115/1.4041074ISI: 000453774200016OAI: oai:DiVA.org:liu-153643DiVA, id: diva2:1276270
Note

Funding Agencies|Labex Solstice

Available from: 2019-01-07 Created: 2019-01-07 Last updated: 2019-01-07

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Broitman, Esteban
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Department of Physics, Chemistry and BiologyFaculty of Science & Engineering
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Journal of tribology
Tribology (Interacting Surfaces including Friction, Lubrication and Wear)

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