Awarded Research Theme List

Grant Year No. Research Theme Principal Investigator
(Country)
Co-
Investigator
(Country)
Related Presentation/Publication
(Textual quotation)
2011
First
11A01 Triboemission and Boundary Film Formation Dr. Thomas Reddyhoff(UK) N/A Summary
Triboemission is the emission of photons, electrons and other charged particles that arise from a sliding contact. Little is known about this phenomenon, despite its possibly crucial role in the formation of boundary films and in the degradation of lubricants. To address this, our TTRF sponsored project developed a new measurement system to spatially map triboemission. The system comprises a simulated asperity contact, located close to a microchannel plate and phosphor screen within a high vacuum. This enabled spatially resolved triboemission images to be obtained for the first time. These are beginning to explain how emission mechanisms occur and also reveal previously unobserved phenomena. Furthermore, close correlation between emission maps and SEM images of surface damage highlights how this approach can be used to monitor wear processes in great detail.
Fluorescence microscopy and UV stimulated emission technique are now being developed to investigate the effects of triboemission on lubricants.

Published papers to date:
[1] Le Rouzic, J., Reddyhoff, T. “Spatially Resolved Triboemission Measurements”, Tribology Letters, 55, pp 245-252.http://link.springer.com/article/10.1007%2Fs11249-014-0352-x#page-1

[2] Ciniero, A. Le Rouzic, J., Reddyhoff, T. “Correlating Surface Damage with Spatially Resolved Triboemission Measurements”, Wear, accepted for publication.

Planned publications:
Currently a further paper is in preparation to be submitted to Tribology Letters.
It should also be noted that much of the time of this project to date, has been spent developing the equipment. Now that this has been achieved, we expect to make numerous papers and presentations over the coming years. We will acknowledge TTRF in these and will keep TTRF informed of progress.
Presentations to date:
[3] Ciniero, A. Le Rouzic, J., Reddyhoff, T., “Triboemission Measurements”, July 9th 2014, Improving Wear and Friction Testing Workshop, National Physical Laboratory, http://www.npl.co.uk/upload/pdf/20140709-mades-workshop.pdf

[4] Ciniero, A. Le Rouzic, J., Reddyhoff, T., “Correlating triboemission with surface damage”, September 3rd 2014, Leeds-Lyon Tribology Symposium http://www2.mech-eng.leeds.ac.uk/leeds-lyon/documents/FullProgramme7010914_webversion.pdf

[5] Ciniero, A. Le Rouzic, J., Reddyhoff, T., “Triboemission Imaging”, September 22nd 2014, Frontier in Tribology Workshop, Lanzhou Institute of Chemical Physics.http://www.licp.cas.cn/qtgn/tzgg/201409/P020140917555615203051.pdf#page=15 Planned presentations: a) Wear of Materials (abstract accepted), b) ITC (abstract submitted). Awards: The research that the TTRF grant enabled was featured in the “Cutting Edge” article in the Tribology and Lubrication Technology magazine: http://onlinedigitalpublishing.com/publication/?i=225378&p=114
10A10 A Novel Tribometer to Test Articular Cartilage under Physiological Loading and Shear Conditions Dr. Philippa Cann (UK) Dr. Daniele Dini (UK),
Prof. A. Kinloch (UK)
The research has contributed the following:
♦ Dr Accardi's PhD thesis Imperial College London "Numerical and Experimental Characterisation of Articular Cartilage - A Study on Biomechanics and Biotribology, Osteoarthritis and Tissue Engineering Solutions", November 2012.
♦ Accardi, M.A., D. Dini, and P.M. Cann, "Experimental and numerical investigation of the behaviour of articular cartilage under shear loading ? interstitial fluid pressurisation and lubrication mechanisms", Tribol. Int., 44(5), (2011), p. 565-578.

The work was also presented at the following meetings:
♦ Muscoskeletal Meeting Imperial College 2011 "Mechanical and Tribological Characterisation of Articular Cartilage for the Study of Osteoarthritis and Orthopaedic Applications", poster Accardi, Dini, Cann et al. Award-winning Poster
♦ Accardi, M.A. and Dini, D. "Modelling of the Mechanical Behaviour of Human Joints Cartilage" in Proceedings of the STLE/ASME International Joint Tribology Conference 2008 (U.S., ASME), 2009, 147-149.
♦ Accardi, M.A., Cann, P.M. and Dini, D. "Theoretical and Experimental Investigation of Articular Cartilage Behaviour under Controlled Tribological Loading" in Proceedings of the 2nd European Conference on Tribology (ECOTRIB 2009), 2009, 1-6.
♦ Accardi, M.A., Cann, P.M. and Dini, D. "Mechanical response and onset of damage in articular cartilage: a combined experimental and numerical investigation" in Proceedings of the Third International Conference on Mechanics of Biomaterials & Tissues (ICMOBT 2009).
♦ Accardi, M.A., Dini, D., Lim, N.H., Yamamoto, K., and Cann, P.M., "Articular cartilage damage - a biochemical and biomechanical investigation", in Proceedings of the British Orthopaedic Research Society, 12-13 July 2010, Cardiff, Wales, UK.
♦ Accardi, M.A., Yamamoto. K., Lim, N.H., Cann, P.M., and Dini, D., "Articular Cartilage Behaviour under Shear Loading - Fluid Pressurisation and Lubrication Mechanisms", Proceedings of the 6th World Congress on Biomechanics, 1-6 August 2010, Singapore.
♦ Accardi, M.A., Yamamoto. K., Lim, N.H., Cann, P.M., and Dini, D., "Aamage in Articular Cartilage - A Biomechanical, Biochemical and Numerical Investigation", Proceedings of the 6th World Congress on Biomechanics, 1-6 August 2010, Singapore.
♦ Accardi, M.A., Yamamoto, K., Lim, N.H., Dini, D., Cann, P.M., "Understanding the Mechanical Behaviour of Articular Cartilage using Indentation and Compression Tests ? Numerical and Experimental Investigation",
in Proceedings of the STLE/ASME International Joint Tribology Conference 2010, 17-20 October 2010, San Francisco, California, USA.
♦ Accardi, M.A., Dini, D., Cann, P.M., "Biotribology of Native and Damaged Articular Cartilage", in Proceedings of the STLE/ASME International Joint Tribology Conference 2010, 17-20 October 2010, San Francisco, California, USA.
♦ Accardi, M.A., McCullen, S., Callanan, A., Chung, S., Stevens, M., Cann, P.M., and Dini, D., "Shear behaviour and progression of damage in articular cartilage and its tissue-engineered counterpart: Effect of fibre orientation", Proceedings of the 1st International Conference on Biotribology, 18-21 September 2011, London, UK.
♦ Accardi, M.A., Ngee, H.L., Yamamoto, K., Mattei, L., Campioni, E., Cobb, J., Cann, P.M., and Dini, D. "Osteoarthritis and damage in articular cartilage - a biochemical, biomechanical and numerical study", Proceedings of the 1st International Conference on Biotribology, 18-21 September 2011, London, UK.
♦ Accardi, M.A., Cann, P.M., Ngee, H.L., Yamamoto, K., Cobb, J., and Dini, D., "A Combined Experimental and Numerical Investigation of Biochemically and Biomechanically Induced Damage in Articular Cartilage", in Proceedings of the STLE/ASME International Joint Tribology Conference 2011, 24-26 October 2011, Los Angeles, California, USA.
♦ Accardi, M.A., Cann, P.M., Dini, D., "Mechanical and tribological characterisation of articular cartilage and tissue engineered materials", in Proceedings of the STLE/ASME International Joint Tribology Conference 2012, 8-10 October 2012, Denver, Colorado, USA.

Publications Submitted:
♦ Accardi, M.A., McCullen, S.D., Callanan, A., Chung, S., Cann, P.M., Stevens, M.M., and Dini, D., "Effect of Fibre Orientation on the Frictional and Mechanical Properties of Tissue Engineered Articular Cartilage", Tissue Engineering Part A, submitted for publication 2012.
10A14 FEM Modelling of Rolling/ Sliding Contacts in the Running in Phase Dr. Jamari(Indonesia) Prof.dr.ir. D.J. Schipper (Neth.) We wish to publish our results in TRIBOLOGY INTERNATIONAL and WEAR. For the WEAR submission we still need some more results.
2011
Second
11B01 Mechanisms of Lubrication by Nano-Confined Ionic Liquid Assoc.Prof. Susan Perkin (UK) N/A Publications:
♦Smith, A. M., Lovelock, K. R. J., Gosvami, N. N., Licence, P., Dolan, A., Welton, T., Perkin, S.*, Monolayer to bilayer structural transition in confined pyrrolidinium -based ionic liquids. Journal of Physical Chemistry Letters, (2013) 4, p.378-382
♦Smith, A. M., Lovelock, K. R. J., Gosvami, N. N., Perkin, S.*, Quantized Friction and Stick-Slip in Ionic Liquid Lubricants. (in preparation)
♦Smith, A. M., Lovelock, K. R. J., Perkin, S.*, Structure of ionic liquids confined to thin films. (to be submitted to Faraday Discussion 167 on "Mesostructure and dynamics in liquids and solutions" 2013)

Conference presentations (invited oral presentations):
♦19-24-Aug-2012: 'Self-assembly and Friction in Confined Ionic Liquid Electrolytes' - Invited keynote lecture at International Society of Electrochemistry Annual Meeting, Prague, Czech Republic.
♦5-Aug-2012: 'On the structure and lubrication of ionic liquid thin films at the molecular level' Oral presentation at EUCHEM conference on ionic liquids, Cardiff, UK.
♦8-12-Jul-2012: 'Lubrication by Ionic Liquids'- Invited lecture at Gordon Research Conference on Tribology, Colby College, Waterville ME.
♦26-Jun-2012: 'Layering and lubricity of ionic liquids confined to thin films' - lecture at workshop on Ionic Liquids and Coulomb Fluids at Interfaces, Cumberland Lodge, UK.
♦17-May-2012: 'lonic liquids in thin films: structure and lubrication' - Invited lecture at BP Institute, Cambridge, UK.
♦07-May-2012: 'Pure Ionic Liquids Confined to Thin Films'- Invited lecture in CECAM International Workshop on New Challenges in Electrostatics of Soft and Condensed Matter, Toulouse, France.

Conference presentation (poster):
♦Alex Smith (PhD student) presented poster: "lonic liquids as lubricants and as additives" at Faraday Discussion 156 on Tribology.
11B03 Tribological modification of CVD-grown graphene with nanometer-thick polymers Assist. Prof.Lei Li
(USA)
Dr.Haitao Liu (USA) (1) Li, Z., Wang, Y., Kozbial, A., Shenoy, G., Zhou, F., McGinley, R., Ireland, P., Morganstein, B., Kunkel, A., Surwade, S. P., Li ,L. and Liu, H. "Effect of airborne contaminants on the wettability of supported graphene and graphite", Nat. Mater., 2013
(2) Kozbial, A., Li, Z., Taylor, A., Iasella, S., Morganstein, B., Wang, Y., Liu, H. and Li L. "Lubricating graphene with nano-meter thick perfluoropolyether", Surface and Coating Technology
(3) Zhou, F., Li, Z., Shenoy, G., Li, L., Liu, H. "Graphene as an anticorrosion barrier: short term and long term effect". ACS