Faites connaître cette offre !
Reference : UMR5629-THOVID-009
Workplace : PESSAC
Date of publication : Tuesday, October 12, 2021
Type of Contract : FTC Scientist
Contract Period : 12 months
Expected date of employment : 1 December 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.
Constraints and risks
We talk about it on Twitter!