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Reference : UMR5629-THOVID-007
Workplace : PESSAC
Date of publication : Monday, July 19, 2021
Type of Contract : FTC Scientist
Contract Period : 12 months
Expected date of employment : 4 October 2021
Proportion of work : Full time
Remuneration : Gross salary 2648-3054/month
Desired level of education : PhD
Experience required : Indifferent
The recruited post-doc will work in the frame of a project entitled: "Reconfigurable networks obtained from readily 3D-printable poly(ionic liquid)s" (Acronym: 3dPILs). The prime objective of this project is to develop a new method for the synthesis of oligo(ionic liquid)s that are readily 3D-printable by stereolithography. This method needs to be simple and industrially viable. Indeed, ionic liquids (ILs) and the polymers derived from ionic liquids – poly(ionic liquid)s (PILs) – have become essential pillars in the field of conductive materials, notably for the construction of ion-exchange and electroactive materials or soft actuators. The precise prototyping and shaping of PILs is a key challenge that must be overcome to integrate these materials into advanced technology devices. In the 3dPILs project, we want to propose a new method to obtain oligo(ionic liquid)s that are readily 3D-printable by stereolithography. Indeed, the superior resolution of this additive manufacturing method is adapted to the construction of any object from the micro- to the macro-scale.
The first objective of the recruited post-doc will be the synthesis of the telechelic oligo(ionic liquid)s by developing a new polyaddition reaction on the basis of previous results obtained in our team. The findings of this first work-package could be the object of a publication on their own given the novelty of the synthesis. The second work-package of the project will be dedicated to the study of the free-radical UV-curing of the telechelic oligo(ionic liquid)s. In the third work-package, the most promising photopolymerizable formulations will be used for the 3D-printing of objects by stereolithography. For each work-package, the synthesized oligomers and the printed object will be characterized in terms of molecular and/or thermomechanical properties (IR, NMR, SEC, TGA, DSC, DMA, rheology). Remarkably, the 3D-printed polyionic networks will contain a large number of dynamic covalent bonds. It is thus expected that the resulting materials will exhibit a “vitrimeric” behavior and the ultimate objective of the project will be to demonstrate that they are reconfigurable and recyclable.
-Synthesis of telechelic oligo(ionic liquid)s with photopolymerizable end functions
-Characterization of the molecular properties of the oligomers according to the usual methodologies (SEC, NMR, UV, IR)
-Study of the photo-polymerization of the oligomers in the form of ionic thermosetting networks
-Characterization of the properties of the ionic thermosetting networks according to the usual methodologies (IR, TGA, DSC, DMA, rheology, tensile test, etc.)
-3D-printing of objects starting from the most promising formulations involving oligo(ionic liquid)s and conventional photo-initiators/additives
-Study of the vitrimeric behavior of the 3D-printed objects (stress relaxation and recyclability)
We are looking for a highly motivated individual holding a PhD in Polymer or Organic Chemistry with solid expertise in molecular and macromolecular synthesis as well as common methods of characterization of the molecular and thermomechanical properties of polymers. A know-how in 3D-printing will be a plus.
- Molecular and macromolecular synthesis
- Common methods for the characterization of the molecular properties of polymers
- Common methods for the characterization of the thermomechanical properties of polymers
The Laboratory of Chemistry of Organic Polymers (LCPO) is a joint research unit affiliated to the CNRS, the University of Bordeaux and l'Institut Polytechnique de Bordeaux (http://www.lcpo.fr). The LCPO is organized into 4 research teams with a total strength of nearly 150 people, including about 50 permanent staff.
With over 30 years of expertise in polymer chemistry, researches at LCPO aim at:
- developing innovative methodologies for precision synthesis of polymers, using in particular biomimetic and/or green chemistry pathways
- designing functional polymer materials by macromolecular engineering and self-assembly.
The work of the recruited agent will be carried out in team 2, "Biopolymers and Bio-sourced Polymers" and in collaboration with team 1, "Polymerization catalyses and Engineering".
The scientific production will be valorized through patents and publications in high impact journals.
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