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Reference : UMR5254-SOPPUY-007
Workplace : PAU
Date of publication : Monday, October 07, 2019
Scientific Responsible name : SAVE Maud / DENIAU Elise
Type of Contract : PhD Student contract / Thesis offer
Contract Period : 36 months
Start date of the thesis : 2 November 2019
Proportion of work : Full time
Remuneration : 2 135,00 € gross monthly
Description of the thesis topic
The development of sustainable chemistry is an important source of innovation for the socio-economic development of various sectors of activity such as the wood, cosmetics and viticulture sectors. The objective of the project is to valorize hydrophobic bio-resources from forest biomass for the synthesis of aqueous dispersed polymer colloids, also known as latex, effective as stabilizers of oil / water interfaces. These interfaces are widely present in the emulsions involved in many formulations for industrial applications. When the liquid emulsions are stabilized by particles, they are called Pickering emulsions and are associated with an increased stability. In the project, emulsions are designed to encapsulate natural active molecules for agronomy or nutraceutical applications .
The doctoral student will be responsible for developing the synthesis of polymer-based latex bioresources by emulsion polymerization, an industrial process that meets the challenges of green chemistry by using water as a continuous phase, thus minimizing use of organic solvents (VOC for Volatile Organic Compound).
The aim of the thesis project will be to propose innovative systems for the release of natural active ingredients and to understand the key parameters during synthesis that control the stability of colloids and act on that of emulsions, hence on the release of active ingredients modulated by the drying of the emulsions.
Key words: biomass, polymer colloids, latex, emulsion polymerization.
CNRS is a French national research organization with more than 1000 research units and 130 service units (most of them co-owned with universities and industry), 33000 employees and a budget of more than 3 Billion € in 2018. CNRS received the "HR Excellence in Research" award from the EC for its human resources strategy for researchers (HRS4R). With its HRS4R action plan, CNRS is committed to continuous improvement aimed at better implementation of the recommendations of the European charter for researchers and the code of conduct for their recruitment. The Institute of Analytical Sciences and Physico-Chemistry for Environment and Materials (IPREM), a multidisciplinary research laboratory from CNRS (Pau, France), is a research unit composed of 250 staff including researchers, post-doc and graduate students.
The research activities at IPREM will be performed in the “Physico-Chemistry of surfaces and polymer Materials” department that gathers 32 permanent scientists and 60 PhD/post-docs involved in an interdisciplinary approach, based on polymer chemistry, physical-chemistry, polymer physics, surface reactivity and photochemistry. These activities produced ca 40-50 publications/year in international journals. Industrial partnerships in polymer science have been developed with non-academic partners (Arkema, LVMH, Airbus, Urgo, Toyal Europe, Rolkem, Safran, Helicopter Engines, SNF, M2I).
The PhD student will be trained to all the facilities for polymer synthesis and characterization gathered into the instrumental platform PolyCats.
The thesis will be realized within the framework of a collaborative project ADEME (ERDG) involving 4 academic partners and 4 industrial partners. In this context, the student will interact with the other partners and more particularly with Dr. V. Schmitt of the CRPP Laboratory, University of Bordeaux.
The doctoral student will be enrolled in the Graduate School of Exact Sciences and Applications of the University of Pau and the Adour Countries (http://ed-sea.univ-pau.fr/fr/index.html) and will benefit from the training offered (languages, professional training, scientific training) by this doctoral school during the 3 years of the thesis.
Constraints and risks
The candidate will be required to have a master's degree or equivalent in chemistry and physico-chemistry of polymers. Good interpersonal and communication skills are desired. A correct level in English will be required.
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