Biomimetic low-friction and stable surface films
Innovative biomimetic surface films using phosphonic acid SAMs and catechol-functionalized PEG copolymers for low friction and high stability. Scalable, low-energy solutions for industrial applications.
Overview
This research presents a biomimetic approach to developing low-friction, stable surface films using phosphonic acid-based self-assembled monolayers (SAMs) and catechol-functionalized PEG bottlebrush copolymers. The technology is designed to provide scalable, low-energy solutions with excellent adhesion and low coefficients of friction (CoF), comparable to those of polytetrafluoroethylene (PTFE). These films are ideal for applications requiring durable, low-friction surfaces, such as biomedical devices and industrial machinery.
Technical specifications
- Phosphonic Acid SAMs: These films form dense monolayers on oxide surfaces through covalent bonding, releasing water and achieving CoF values between 0.01 and 0.05. The films are created using various alkyl chain lengths and end-groups to optimize formation and performance.
- Catechol-Functionalized PEG Bottlebrush Copolymers: Inspired by synovial fluid and mussel adhesion, these copolymers feature densely packed PEG chains with catechol anchors, achieving CoF values below 0.05. Despite potential high costs, they offer impressive adhesion properties.
Technology readiness level
The technology is at TRL 3, indicating that active research and development are underway. Initial experimental setups and validation processes are in progress using tools like ellipsometers, XPS, goniometers, and SEM, with further testing planned for CoF and wear analysis.
About University of Alberta
The University of Alberta is a large, comprehensive public research university in Edmonton with multiple campuses and a strong applied research culture. Industry engages through co-located labs and pilot-scale facilities, as well as established co-op and internship programs that place talent with partners year-round. Integration with Alberta’s province-wide hospital system supports clinical research and accelerates translation. Companies also benefit from proximity to regional industry clusters and collaboration hubs on and near campus for joint R&D and prototyping. Supported by NSERC, CIHR, SSHRC, and Canada Foundation for Innovation funding—plus provincial and industry support—the tech transfer office manages IP, licensing, and startup formation with streamlined sponsored-research agreements.
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