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Reference : UPR5301-ISACAL-077
Workplace : GRENOBLE
Date of publication : Friday, September 10, 2021
Type of Contract : FTC Scientist
Contract Period : 11 months
Expected date of employment : 1 November 2021
Proportion of work : Full time
Remuneration : between 2663,79€ and 3783,24€ gross monthly depending on experience
Desired level of education : PhD
Experience required : 1 to 4 years
The postdoctoral Research Associate will investigate these MFC via SEM/TEM electronic imaging (SEM/TEM) and X-ray tomography (at 3SR). Force spectroscopy for adhesion measurement under controlled environment will be setup at the SFM plateform of ICMG and performed after functionalization of the colloide probe with a cellulose layer. In parallel, effort will be done to compute program for SEM and SFM data analysis.
Understanding and mastering the interactions between two (nano)cellulosic layers (MFC) during drying is a major challenge to promote and consolidate many adhesion processes used in industry concerning for instance the barrier properties or reinforcement of MFC-based materials. It has long been accepted that after hydration, capillary forces and hydrogen bonds dominate this adhesion, but the importance of electrostatic and van der Waals forces has recently been highlighted. By identifying the forces present during drying and their relevance on a large scale, this PolyNat project will determine the effect of the process on adhesion in relation to the intrinsic properties of the layers. A microscopic approach will be set up by combining several experimental analyses. CTP (paper technology center) and FCBA will first produce various cellulosic layers with different properties (size, composition, etc).
A PhD degree in Physical-chemistry or a related discipline is required.
The candidate should be motivated, have a good dexterity with a certain taste for making fine experiments. She/he must know how to take initiatives and like to communicate in order to be able to exchange with the different partners of the project. He/She should have experience in one or more of the following items:
- Near field microscopy and force spectroscopy
- Electronic microscopy
- Computing for image analyzing and Data treatment
The CERMAV ('CEntre de Recherches sur les MAcromolécules Végétales', https://www.cermav.cnrs.fr) is dedicated to the study of polysaccharides (natural sugar-based polymers), the (bio-)synthesis of biologically active oligosaccharides, the use of biomass and the production of nanocomposite materials or glycopolymers. Within this laboratory, the team 'Structure and Properties of Glycomaterials' (SPG) is following a multi-scale approach for the investigation of polysaccharides in solid state (cellulose, starch, chitin, etc.) which extends from the atomistic description of natural or artificial glycomaterials to their structural and functional properties determination. SPG expertise covers a wide range of fields in materials science including crystallography, physico-chemistry of colloids and polymers and materials development. Different techniques of characterisation are applied such as scanning probe and electron microscopies, X-ray and neutron scattering and reflectivity, solid state NMR.
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