New Architectures Of Innovative Silicone Materials (H/F)

Universities and Institutes of France
November 23, 2022
Contact:N/A
Offerd Salary:Negotiation
Location:N/A
Working address:N/A
Contract Type:Temporary
Working Time:Full time
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Job Ref.:N/A
  • Organisation/Company: CNRS
  • Research Field: Chemistry › Physical chemistry Physics › Biophysics Physics › Chemical physics
  • Researcher Profile: First Stage Researcher (R1)
  • Application Deadline: 23/11/2022 23:59 - Europe/Brussels
  • Location: France › VILLEURBANNE
  • Type Of Contract: Temporary
  • Job Status: Full-time
  • Hours Per Week: 35
  • Offer Starting Date: 02/01/2023
  • This Ph. D. project will be carried out within the IMP laboratory of INSA Lyon, which has recognized expertise in the field of synthesis, physico- chemical and physical characterization of silicones on the one hand, and networks of different types, in particular "soft" (elastomers, hydrogels) on the other hand. It has received funding from the National Research Agency (ANR, SIL-GEN-β Project, 2023-2027). The thesis will be co-supervised by F. Ganachaud and D. Portinha, and will benefit from the intellectual and technical environments of the IMP laboratory at INSA Lyon.

    Poly(dimethylsiloxane) (PDMS) and derivatives are widely applied thanks to their high flexibility, their outstanding thermal stability, their hydrophobicity and biocompatibility. To turn them into useful materials, they are crosslinked chemically and filled so as to present appropriated physical and mechanical properties (elasticity, absorption, tear resistance aso). While these so-called conventional elastomers meet the mechanical requirements expected in various fields (automotive, medical devices, electrical applications, kitchen utensils, etc.), certain mechanical properties are currently too low (limited flexibility and elongation partly due to the presence of fillers, tensile strength around 10 MPa) to meet the requirements of new fields of application. In this context, the SIL-GEN-β Project, financially supported by the National Research Agency and coordinated by François Ganachaud, aims to develop new strategies for the development of silicone elastomers with properties that cannot be achieved by current strategies, but which are encountered for other types of materials, in particular from natural polymers. In order to develop silicone elastomers with atypical mechanical properties, this Ph. D. project aims at developing new PDMS precursors with controlled topology and presenting different functional groups capable of physically (supramolecular chemistry) and chemically (covalent chemistry) crosslink. The chosen chemical strategy will make use of the aza Michael addition reaction that allows the synthesis of PDMS derivatives with a wide variety of topologies (linear, grafted, branched, cross-linked) and their chemical modification with supramolecular groups of different cohesive strength (H bonds, ionic bonds). This reaction has been used in the laboratory in particular to develop elastomers which exhibited self-repair properties at room temperature, but with (too) weak mechanical properties. From the control of the structural parameters and the coexistence of cross-linking nodes of varied nature, It is expected novel mechanical properties in terms of hardness and elongation. The work program will be devoted to the synthesis and detailed characterization of functional silicones of varied structure and to the study of their rheological and mechanical properties. In particular, the work will focus on the design of polymers of different molar masses, topology, nature and content of supramolecular groups with respect to chemical crosslinking nodes, and their impact on the macroscopic properties of the materials obtained.

    Web site for additional job details

    https: // emploi.cnrs.fr/Offres/Doctorant/UMR5223-FRAGAN-001/Default.aspx

    Required Research Experiences
  • RESEARCH FIELD
  • Chemistry › Physical chemistry

  • YEARS OF RESEARCH EXPERIENCE
  • None

  • RESEARCH FIELD
  • Physics › Chemical physics

  • YEARS OF RESEARCH EXPERIENCE
  • None

  • RESEARCH FIELD
  • Physics › Biophysics

  • YEARS OF RESEARCH EXPERIENCE
  • None

    Offer Requirements
  • REQUIRED EDUCATION LEVEL
  • Chemistry: Master Degree or equivalent

    Physics: Master Degree or equivalent

  • REQUIRED LANGUAGES
  • FRENCH: Basic

    Contact Information
  • Organisation/Company: CNRS
  • Department: Ingénierie des matériaux polymères
  • Organisation Type: Public Research Institution
  • Website: https:// www. imp-umr5223.fr/
  • Country: France
  • City: VILLEURBANNE
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