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Univ. Paris-Saclay

Sujet de stage / Master 2 Internship

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Bacteriostatic polymer surfaces

Contact: CARROT Géraldine, , geraldine.carrot@cea.fr, +33 1 69 08 41 47
M1 or M2 level internship:
This project consists in the synthesis and the surface grafting of bacteriostatic polymers. The objective is to incorporate these polymers as a layer or a copolymer inside polyethylene films (main materials of food films). In addition to chemistry, both polymers and surfaces will be characterized by several analytical techniques (NMR, FTIR, XPS, microscopy, contact angles ...) before being studied in microbiology. This project will be performed at CEA ( Laboratory LICSEN/NIMBE) for the synthesis and surface chemistry part, in collaboration with INRA-AgroParisTech (Laboratory B2HM) for the characterization and microbiological tests. This project has an industrial support and may continue with a PhD thesis.

Possibility of continuation in PhD: Oui
Deadline for application:30/04/2021

Full description:
Microbial infections are a major concern for many commercial applications such as textiles, food packaging, water purification or medical equipment. Here we are interested mainly in packaging where the challenge here is to reduce the microbial loading (to increase shelf life). The objective is to preferentially incorporate bacteriostatic polymers in packaging due to their advantages of having some mobility and resistance to packaging process conditions (temperature, stretching ...). One of the strategies is to incorporate bacteriostatic polymers into the polymer matrix. The objective is therefore to form block copolymers, with one block that will be the bacteriostatic polymer and to prepare particles grafted with chains of this polymer. The two compounds will then be mixed to the polymer matrix in order to form composite films. After the characterization of polymers (size exclusion chromatography, NMR), particles (TGA) and surfaces (FTIR, XPS, goniometer), microbiological studies will be conducted with our partner team AgroParisTech.
We are looking for this internship, a motivated M2 student who has a solid background in chemistry and polymer characterization and knowledge in surface science (characterization).
Technics/methods used during the internship:
Polymer chemistry, FTIR, size-exclusion chromatography, contact angle, microscopy, profilometry, XPS

Tutor of the internship


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