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Supramolecular polymeric assemblies represent an emerging, promising class of systems with superior versatility compared to their covalent polymeric counterparts. They offer exciting new opportunities for stimuli-responsive structures exhibiting reversible tunable properties, with applications in foodstuff, coatings , cost-efficient processes or biomedical areas. To explore their potential and define strategies for designing novel materials amenable to contemporary needs, a fundamental understanding of their very complex and diverse multiscale supramolecular structure and dynamics is needed. The objective of SUPOLEN is to understand and tailor the structure and dynamics of supramolecular polymers based on well-defined building blocks.
SUPOLEN will provide young researchers with a unique background in materials synthesis, characterisation and modelling, in the important interdisciplinary field of supramolecular assembly. Projects will be experimental and/or theoretical in nature.
Within the SUPOLEN Marie Curie ITN, a PhD position is available in the group of Prof. Christian Ligoure, Laurence Ramos and Serge Mora at Université Montpellier 2, France.
The goal of this experimental project is to investigate the nucleation, propagation and healing of cracks in supramolecular associative systems under mechanical stress.
The candidate will use different experimental approaches to induce cracks in viscoelastic fluids. High and low Reynolds numbers will be investigated using for instance the injection of a low‐viscosity liquid in a viscoelastic fluid in Hele‐Shaw cell (low Reynolds number limit) and the perforation of liquid sheets produced by the impact of a drop viscoelastic fluid on a small solid target (high Reynolds number limit). Visualization using high speed-camera will be used, possibly between cross‐polarizers to probe the birefringence. Image analyses will include particle imaging velocimetry to probe the displacement field in the vicinity of the crack.
The investigated systems will include model soft networks developed in Montpellier (wormlike micelles and emulsions bridged by telechelic polymers), as well as novel, stimuli‐responsive materials synthesized by network partners (telechelic star polymers and metallo-supramolecular polymer chains). The key questions that we aim to address include:
- How can the fracture mechanisms be rationalized in transient gels? How can the notions of brittle and ductile fractures be extended to the case of transient gels?
- How do the crack nucleation, propagation and healing depend on the nature of the reversible bonds between entities in different transient gels?
- For responsive systems, how do external stimuli (temperature, pH, irradiation…) modify the fracture processes?
Candidates with background in chemical engineering, materials science or physics are encouraged to apply.
Nr of positions available : 1
Early stage researcher or 0-4 yrs (Post graduate)
First Stage Researcher (R1)
A competitive salary according to Marie Curie regulations. Extensive training in specific scientific competencies and transferable skills.
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|Degree||Master Degree or equivalent|
|Degree||Master Degree or equivalent|
|Must meet Marie Curie eligibility criteria.|
To better plan and organise their stay in a foreign European country, researchers and their families can also benefit of the free and personalised assistance offered by the EURAXESS Services Centres, a network of more than 200 centres located in 40 different European countries.
Université Montpellier 2, Science et Techniques
Place Eugène Bataillon
FP7/People - Marie Curie Actions
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