Professor Jason Stokes

Deputy Associate Dean (RES)

Faculty of Engineering, Architecture and Information Technology

Professor

School of Chemical Engineering
Faculty of Engineering, Architecture and Information Technology
jason.stokes@uq.edu.au
+61 7 336 54361

Overview

Jason Stokes is Deputy Associate Dean of Research (Research Training) for the Faculty of Engineering, Architecture and Information Technology and is a Professor in the School of Chemical Engineering. His formal qualifications include a Bachelor of Engineering (Chemical) and PhD from The University of Melbourne, Australia. He spent 10 years (1999 – 2008) as a research scientist at Unilever’s corporate research laboratory in the United Kingdom and joined The University of Queensland in October 2008.

Jason’s research principally concerns the rheology, tribology and interfacial properties and structure of complex fluids and soft materials encompassing nanocrystalline cellulose, microgels, biopolymers, colloids, emulsions, gels, biofluids, plant cells, bacterial cellulose hydrogels and liquid crystals. In partnership with industry, his research is applied to diverse research areas such as food oral processing and sensory science, food structure design and food engineering, and in the flow and pumping of non-Newtonian fluids and suspensions. Fundamental research includes developing new principals in viscoelastic lubrication of complex fluids, including soft-tribology and biotribology, as well as development of soft materials with programmable anisotropy using aqueous suspensions of nanocellulose.

Jason has over 120 publications and h-index of 40, and awards include a the British Society of Rheology Annual Award 2013 for contributions to the field of rheology, and the 2012 Capt. Alfred E. Hunt Memorial Award from Society of Tribology Lubrication Engineers (STLE) for authoring "the best paper dealing with the field of lubrication". He is an Elected Delegate of the Individual Members for the European Society of Rheology Committee (2018– 2022), Associate editor for the Korea-Australia Rheology Journal, and member of the editorial boards for the Journal of Texture Studies, Journal of Biotribology, Cogent Engineering.

Research Interests

  • Development of responsive soft materials with programmable anisotropy and to mimic structural hierarchy found in nature.
    The project aims to use nanocrystalline cellulose and charge-directed polymer self-assembly to form a unique liquid crystal glass phase.
  • ew principals of viscoelastic lubrication for complex fluids and soft matter.
    The project aims to redefine the complex fluid-substrate interactions in soft tribological contacts that is beneficial to diverse fields including advanced materials and complex fluids, engineering tribology, biolubrication and food structure design.
  • Rational food structure design and food oral processing

Research Impacts

Jason has established substantial partnerships with industry, which has included pioneering totally new measurement techniques and approaches in tribology, rheology and surface sciences to study the physics of food oral processing and sensory science to enable rational food-structure design. His research is having a substantive impact in gaining a deeper scientific understanding of food oral processing and outputs from his research are used directly by industry to improve the nutritional quality of food and beverages that benefits quality of life and health, and processes that deliver to sustainability and job-creation.

His impact and long term partnership with industry was recognised by a UQ Partners in Research Excellence Award in 2014.

Recognising his contribution to the training Higher Degree by Research students, including PhD students, he was awarded a Special Commendation for Industry Engagement in Graduate Research from 2020 Australian Council of Graduate Research Excellence.

Qualifications

  • Bachelor of Engineering (Honours - H1), University of Melbourne
  • Doctor of Philosophy - Engineering, University of Melbourne

Publications

View all Publications

Grants

View all Grants

Supervision

View all Supervision

Available Projects

  • A scholarship is currently available for domestic and onshore international students. Please contact me to express you interest (Updated June 2020)

    Many natural materials exhibit extraordinary properties. For example, butterfly wings are highly coloured despite not containing dye molecules and mollusc shells exhibit high fracture toughness despite being comprised of 95% of a brittle mineral. These properties are dictated by the spatial orientation of nanostructures that make up the materials over many length scales, hence the ability to control structural hierarchy when designing new materials is crucial to obtain outstanding properties. Our recent discovery of a Liquid crystal hydroglass (LCH) provides an exciting avenue to control the structural hierarchy and hence properties of soft materials. LCH is a biphasic soft material with flow programmable anisotropy that forms via phase separation in suspensions of charged colloidal rods upon increases in ionic strength. This project aims to expand on the materials space for LCH materials in order to create viscoelastic materials with complex rheology as well as structural, mechanical and optical heterogeneity. The intended outcome is enabling the creation of anisotropic materials with shape-memory and shape-restoring features for the realization of artificial muscles, novel biomedical devices, soft robotics and morphing structures.

    The HDR student has a choice between two potential projects.

    Project 1 aims to develop thermo- and/or photo-responsive LCH materials by surface functionalising nanocrystalline cellulose (NCC) colloidal rods. The student will design and synthesise block copolymers that self-assemble to the surface of the nanocellulose and characterise their interfacial chemistry and phase behaviour.

    Alternatively, Project 2 aims to explore and diversify the materials space for LCH materials and their rheological properties. This project will vary solution properties and matrix rheology/composition for NCC suspensions, as well as investigate the presence and properties of LCH phases in a diverse range of anisotropic charged colloids.

    The projects are part of an Australian Research Council Discovery Project involving collaboration between School of Chemical Engineering, Australian Institute for Bioengineering and Nanotechnology, Centre for Advanced Imaging, Centre for Microscopy and Microanalysis at the UQ, and the Australian Nuclear Science and Technology Organisation (ANSTO).

    The successful candidate must commence by Research Quarter 1, 2021. Applicants should already reside in Australia due to current travel restrictions.

    References:

    Y Xu, A Atrens, JR Stokes "A review of nanocrystalline cellulose suspensions: Rheology, liquid crystal ordering and colloidal phase behaviour" Advances in colloid and interface science 275, 102076 (2020) Y Xu, A Atrens, JR Stokes "Structure and rheology of liquid crystal hydroglass formed in aqueous nanocrystalline cellulose suspensions" Journal of colloid and interface science 555, 702-713 (2019) Y Xu, AD Atrens, JR Stokes "Liquid crystal hydroglass formed via phase separation of nanocellulose colloidal rods" Soft matter 15 (8), 1716-1720 (2019)

    https://www.findaphd.com/phds/project/programmable-anisotropic-soft-materials/?p121656

  • Project in the area of Food and Soft Matter Engineering are available with specific details to be discussed with prospective students. The research group has many associations with industry and projects needs to be designed specifically. Our industry partners are international and national companies spaning foods, personal care, and pharmaceuticals.

  • The project aims to develop new principles of viscoelastic lubrication in soft contacts. New insights into friction behaviour arising from complex fluid-substrate interactions are expected to be generated using techniques and interdisciplinary approaches that bridge rheology, tribology and surface science. Outcomes from the research should provide significant benefits to diverse fields including advanced materials and complex fluids, engineering tribology, biolubrication and food structure design. This project is part of a prestigious Australian Research Council Discovery Project.

View all Available Projects

Publications

Book Chapter

  • Shewan, H. M. and Stokes, J. R. (2020). Food structure development for rheological/tribological performance. Handbook of Food Structure Development. (pp. 175-198) edited by Fotis Spyropoulos, Aris Lazidis and Ian Norton.Cambridge, United Kingdom: Royal Society of Chemistry. doi:10.1039/9781788016155-00173

  • Stokes, Jason R. and Xu, Yuan (2019). Rheology of Food Materials: Impact on and Relevance in Food Processing. Reference Module in Food Science. edited by . Elsevier. doi:10.1016/b978-0-08-100596-5.21076-7

  • Dolan, Grace K., Yakubov, Gleb E. and Stokes, Jason R. (2018). Bio-tribology and bio-lubrication of plant cell walls. Annual plant reviews online. (pp. 1-42) edited by .Chichester, West Sussex, United Kingdom: Wiley-Blackwell. doi:10.1002/9781119312994.apr0607

  • Stokes, Jason R. (2014). Aqueous lubrication and food emulsions. Aqueous lubrication: natural and biomimetic approaches. (pp. 73-102) edited by Nicholas D. Spencer.Singapore: World Scientific Publishing Company. doi:10.1142/9789814313773_0003

  • Stokes, Jason R. (2013). Saliva lubrication. Encyclopedia of Tribology. (pp. 2971-2977) edited by Jane Wang and Yip-Wah Chung.New York, NY, USA: Springer. doi:10.1007/978-0-387-92897-5

  • Stokes, Jason R. (2012). 'Oral' Rheology. Food oral processing : fundamentals of eating and sensory perception. (pp. 225-263) edited by Jianshe Chen and Lina Engelen.Chichester, West Sussex, UK: Wiley-Blackwell. doi:10.1002/9781444360943.ch11

  • Stokes, Jason R. (2012). 'Oral' Tribology. Food oral processing : fundamentals of eating and sensory perception. (pp. 265-287) edited by Jianshe Chen and Lina Engelen.Chichester, West Sussex, UK: Wiley-Blackwell. doi:10.1002/9781444360943.ch12

  • Stokes, Jason R. (2012). Food biopolymer gels, microgel and nanogel structures, formation and rheology. Food materials science and engineering. (pp. 151-176) edited by Bhesh Bhandari and Yrjo H Roos.West Sussex, United Kingdom: Wiley - Blackwell. doi:10.1002/9781118373903.ch6

  • Kravchuk, Olena, Torley, Peter and Stokes, Jason R. (2012). Food texture is only partly rheology. Food materials science and engineering. (pp. 349-368) edited by Bhesh Bhandari and Yrjo H Roos.Chichester, West Sussex, United Kingdom: Wiley-Blackwell.

  • Stokes, Jason R. (2011). Rheology of industrial microgels. Microgel suspensions: Fundamentals and applications. (pp. 327-354) edited by Alberto Fernandez-Nieves, Hans M. Wyss, Johan Mattsson and David A. Weitz.Weinheim, Germany: Wiley-VCH Verlag. doi:10.1002/9783527632992.ch13

Journal Article

Conference Publication

Other Outputs

Grants (Administered at UQ)

PhD and MPhil Supervision

Current Supervision

  • Master Philosophy — Principal Advisor

  • Doctor Philosophy — Principal Advisor

  • Doctor Philosophy — Principal Advisor

    Other advisors:

  • Doctor Philosophy — Principal Advisor

  • Doctor Philosophy — Principal Advisor

  • Doctor Philosophy — Associate Advisor

    Other advisors:

  • Doctor Philosophy — Associate Advisor

  • Doctor Philosophy — Associate Advisor

Completed Supervision

Possible Research Projects

Note for students: The possible research projects listed on this page may not be comprehensive or up to date. Always feel free to contact the staff for more information, and also with your own research ideas.

  • A scholarship is currently available for domestic and onshore international students. Please contact me to express you interest (Updated June 2020)

    Many natural materials exhibit extraordinary properties. For example, butterfly wings are highly coloured despite not containing dye molecules and mollusc shells exhibit high fracture toughness despite being comprised of 95% of a brittle mineral. These properties are dictated by the spatial orientation of nanostructures that make up the materials over many length scales, hence the ability to control structural hierarchy when designing new materials is crucial to obtain outstanding properties. Our recent discovery of a Liquid crystal hydroglass (LCH) provides an exciting avenue to control the structural hierarchy and hence properties of soft materials. LCH is a biphasic soft material with flow programmable anisotropy that forms via phase separation in suspensions of charged colloidal rods upon increases in ionic strength. This project aims to expand on the materials space for LCH materials in order to create viscoelastic materials with complex rheology as well as structural, mechanical and optical heterogeneity. The intended outcome is enabling the creation of anisotropic materials with shape-memory and shape-restoring features for the realization of artificial muscles, novel biomedical devices, soft robotics and morphing structures.

    The HDR student has a choice between two potential projects.

    Project 1 aims to develop thermo- and/or photo-responsive LCH materials by surface functionalising nanocrystalline cellulose (NCC) colloidal rods. The student will design and synthesise block copolymers that self-assemble to the surface of the nanocellulose and characterise their interfacial chemistry and phase behaviour.

    Alternatively, Project 2 aims to explore and diversify the materials space for LCH materials and their rheological properties. This project will vary solution properties and matrix rheology/composition for NCC suspensions, as well as investigate the presence and properties of LCH phases in a diverse range of anisotropic charged colloids.

    The projects are part of an Australian Research Council Discovery Project involving collaboration between School of Chemical Engineering, Australian Institute for Bioengineering and Nanotechnology, Centre for Advanced Imaging, Centre for Microscopy and Microanalysis at the UQ, and the Australian Nuclear Science and Technology Organisation (ANSTO).

    The successful candidate must commence by Research Quarter 1, 2021. Applicants should already reside in Australia due to current travel restrictions.

    References:

    Y Xu, A Atrens, JR Stokes "A review of nanocrystalline cellulose suspensions: Rheology, liquid crystal ordering and colloidal phase behaviour" Advances in colloid and interface science 275, 102076 (2020) Y Xu, A Atrens, JR Stokes "Structure and rheology of liquid crystal hydroglass formed in aqueous nanocrystalline cellulose suspensions" Journal of colloid and interface science 555, 702-713 (2019) Y Xu, AD Atrens, JR Stokes "Liquid crystal hydroglass formed via phase separation of nanocellulose colloidal rods" Soft matter 15 (8), 1716-1720 (2019)

    https://www.findaphd.com/phds/project/programmable-anisotropic-soft-materials/?p121656

  • Project in the area of Food and Soft Matter Engineering are available with specific details to be discussed with prospective students. The research group has many associations with industry and projects needs to be designed specifically. Our industry partners are international and national companies spaning foods, personal care, and pharmaceuticals.

  • The project aims to develop new principles of viscoelastic lubrication in soft contacts. New insights into friction behaviour arising from complex fluid-substrate interactions are expected to be generated using techniques and interdisciplinary approaches that bridge rheology, tribology and surface science. Outcomes from the research should provide significant benefits to diverse fields including advanced materials and complex fluids, engineering tribology, biolubrication and food structure design. This project is part of a prestigious Australian Research Council Discovery Project.

  • Projects seek to relate physical measurements such as rheology and tribology to the flow and deformation of foods during consumption that affects sensory perception and consumer preferences. We are particularly interested in connecting chemical engineering, physiology, and food sensory science. These studies are used to assist industry to rationally design processed foods and beverages with consideration for formulating consumer acceptable healthy & nutritious foods and sustainable process engineering.