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Interface-strengthened polyimide/carbon nanofibers nanocomposites with superior mechanical and tribological properties
State Key Laboratory of Materials-Oriented Chemical Engineering, Nanjing University of Technology.
State Key Laboratory of Materials-Oriented Chemical Engineering, Nanjing University of Technology.
Department of Chemical and Biomolecular Engineering, The University of Akron.
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Machine Elements.ORCID iD: 0000-0001-6085-7880
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2014 (English)In: Macromolecular Chemistry and Physics, ISSN 1022-1352, E-ISSN 1521-3935, Vol. 215, no 14, p. 1407-1414Article in journal (Refereed) Published
Abstract [en]

A self-assembling molecule, n-octadecane phosphate, is successfully synthesized and used to modify the surface property of carbon nanofibers (CNFs). Both untreated CNFs (CNFs(u)) and treated CNFs (CNFs(t)) are incorporated in polyimide (PI) as filler to study the interfacial­property-determined thermal, mechanical, and tribological properties of their corresponding nanocomposites. At room temperature, the mechanical properties of PI/CNFs(t) including elongation-to-break, tensile strength, bending strength, and impact strength are remarkably improved by 150%, 29.4%, 26.7%, and 183%, respectively, in comparison with the PI/CNFs(u) composites. At 150 °C, the enhancement of the elongation-to-break reaches 250%, while the tensile and flexural-strength enhancement reduce to 2.8% and 20.4%. In addition, the tribological properties of PI/CNFs(t) composite are also improved due to the better interfacial interaction between the filler and the matrix. Microstructure analysis of the fracture surface directly reveals the better dispersion quality of CNFs(t) in PI and superior interfacial adhesion with the introduced assembling layer.

Place, publisher, year, edition, pages
2014. Vol. 215, no 14, p. 1407-1414
National Category
Tribology (Interacting Surfaces including Friction, Lubrication and Wear)
Research subject
Machine Elements
Identifiers
URN: urn:nbn:se:ltu:diva-5861DOI: 10.1002/macp.201400194ISI: 000339494300006Scopus ID: 2-s2.0-84904763017Local ID: 40de3585-8e6b-4347-be06-a7dcf27091d4OAI: oai:DiVA.org:ltu-5861DiVA, id: diva2:978737
Note
Validerad; 2014; 20140617 (andbra)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2018-07-10Bibliographically approved

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Shi, Yijun

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