About the Project

Advanced concepts in 4D printing, a manufacturing paradigm in which 3D‑printed materials are engineered to change shape or function over time in response to external stimuli are explored in this project. The research focuses on hygromorph and poligromorph composites—innovative material systems that act as structural actuators when triggered by environmental factors such as humidity, water or hydrocarbons. These materials enable the development of smart and morphing structures capable of autonomous adaptation, with potential applications ranging from aerospace to sustainable architecture. Despite their promise, current hygromorph/poligromorph-based systems remain constrained by limited actuation speed, as well as challenges in long-term structural integrity and repeatability of their responses. This PhD will address these critical limitations, aiming to unlock faster, more reliable, and durable morphing performance. The PhD student will:

• Design, develop, and characterise multifunctional, sustainable, and nano-enabled coatings and material formulations for 4D printing systems, with a focus on enhancing absorption/desorption kinetics.
• Evaluate and validate improvements in structural integrity and accelerated adsorption/desorption behaviour in existing 4D-printed hygromorph materials, using advanced mechanical and materials testing facilities at the University of Bristol.
• Contribute to the design of lab-scale demonstrators incorporating these novel 4D-printed materials, enabling testing under diverse loading and environmental conditions (including vibration, temperature/humidity variations, and electromagnetic fields), and assess their performance in terms of actuation authority and repeatability.
• Interact with researchers and partners from France (IRDL Lorient, UTBM Belfort Montbeliard, INSA Lyon) as a part of a UK-France joint project on 4D printed materials systems.

Eligibility: UK citizens subject to security clearance