Department of Materials Science & Metallurgy Goldsmiths' Seminars: Liquid Crystalline Elastomers for Reversible Actuation and Energy Dissipation

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• Dr Mohand Saed
• Thursday 06 March 2025, 15:30-17:00
• Goldsmiths' 2 & https://zoom.us/j/96836714124.

If you have a question about this talk, please contact Caroline Teagle.

Refreshments and cakes will be available!

Abstract:

Liquid crystalline elastomers (LCEs) are a versatile class of functional materials exhibiting exceptional properties, including large-stroke reversible actuation, anomalous mechanical energy damping, and reversible pressure-sensitive adhesion. A defining feature of LCEs is their soft elasticity, characterized by a plateau of low, nearly constant stress during stretching, slow stress relaxation, and enhanced surface adhesion. This presentation explores the potential of LCEs in actuator applications and highlights their intrinsic energy dissipation mechanisms, particularly in reversible adhesion.

Biography:

Dr. Saed is a University Royal Society Fellow and a group leader at the Cavendish Laboratory, University of Cambridge, specializing in smart, sustainable, and stimuli-responsive polymers. His research spans new material design, additive manufacturing, vitrimers, adhesives, and liquid crystalline elastomers (LCEs). Over a decade-long academic career, Dr. Saed has made pioneering contributions to polymer science. During his PhD at the University of Colorado, he played a crucial role in overcoming synthesis challenges in LCEs, introducing click chemistry for scalable production. His dissertation led to seven publications and a US patent, revolutionizing the field. As a postdoctoral researcher at the University of Texas, he expanded into 3D printing and microfabrication, developing a 4D printing technique for LCEs, now widely adopted. This work resulted in three papers and another US patent. At Cambridge, Dr. Saed has published over 30 original papers, filed four patents, and secured over £2 million in research funding. He co-founded Cambridge Smart Plastics Ltd, serving as Chief Technical Officer, to commercialize vitrimer technologies developed during his tenure. As of May 2025, he has 43 original papers, 6 patents (3 granted, 3 filed), 2,900 citations, and an H-index of 26. His research is featured in leading journals such as Chemical Reviews, Nature Communications, and Advanced Materials.

This talk is part of the Department of Materials Science & Metallurgy Goldsmiths' Seminars series.

This talk is included in these lists:

• Department of Materials Science & Metallurgy Goldsmiths' Seminars
• Goldsmiths' 2 & https://zoom.us/j/96836714124

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