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Reference : UMR7374-LOUHEN-001
Workplace : ORLEANS
Date of publication : Thursday, April 01, 2021
Scientific Responsible name : Louis HENNET (Ingénieur de Recherche, HDR)
Type of Contract : PhD Student contract / Thesis offer
Contract Period : 36 months
Start date of the thesis : 1 October 2021
Proportion of work : Full time
Remuneration : 2 135,00 € gross monthly
Description of the thesis topic
This thesis work is part of a PSPC (*) project bringing together two companies and two research laboratories: “Terre de Couleur” in Rochecorbon (37) and BioEC in Longjumeau (91), the ICMN ( **) and the ICOA (***) in Orléans (45).
In the field of cosmetics, water is an essential element in the preparation of ingredients and the manufacture of products. Mixed with clays, it makes it possible to produce hair masks or shampoos. In these products, the clay contributes to the hydration and sanitation of the skin by draining organic and mineral impurities.
Water is a very complex liquid with hydrogen bonds that constantly bind, break and reform again, causing a permanent reorganization of the water. It is possible to influence this dynamic of water by "activating" it.
The Terre de Couleur Laboratory manufactures and markets fully-natural products and uses water activated by a radiative process to improve the effectiveness of the products. This activation results in a modification of the properties of water and hydrated materials. If the improvement in efficiency has been proven by dermatological tests, the influence of this activated water on the ingredients remains to be studied.
In order to improve the activation process and develop new products, it is therefore important to fully understand all the phenomena induced by activation.
Thus, this thesis has several objectives:
• A first objective will be to advance in the understanding of the processes involved in the activation of water by studying the physicochemical properties of different water (tap water, mineral water ...) in their normal states. and activated.
• The main objective of the work will be to study the behavior of the ingredients mixed with activated water. The study will focus on clays used in products and other elements like silica and essential oils.
• Finally, an evaluation of the interactions of water and activated products with the skin will be carried out in collaboration with the BioEC laboratory.
This work will allow the development of new natural formulations that combine efficacy and safety.
The candidate will be based at the ICMN and will interact frequently with the other partners.
The experiments will be carried out mainly at the ICMN, at the SOLEIL synchrotron and on various technical platforms.
(*) Structuring Projects For Competitiveness
(**) Interfaces, Containment, Materials and Nanostructures (http://www.icmn.cnrs-orleans.fr/)
(***) Institute of Organic and Analytical Chemistry (https://www.icoa.fr/)
The CNRS is a public multidisciplinary scientific research body, placed under the supervision of the Ministry of Higher Education, Research and Innovation. It employs 32,000 people in more than 1,100 research laboratories in France and abroad.
The ICMN, where the thesis will take place, is a Mixed Research Unit (UMR 7374, CNRS / University of Orléans) of the Regional Delegation of the CNRS Center, Limousin, Poitou-Charentes (DR08). The laboratory is made up of 46 staff, including 36 permanent.
ICMN's areas of expertise mainly relate to the study of divided matter.
Registration for a doctorate will be done at the University of Orleans.
The doctoral student will benefit from all the technical and human resources necessary for the realization of this project.
Constraints and risks
No particular risk.
One-off missions with the various partners of the project.
Candidates will hold a Master's degree or with a strong component in physico-chemistry and / or spectroscopy. Skills in the field of cosmetics will be appreciated.
English language: B2. / French language: B2.
The application file will include a CV, a cover letter as well and a recommendation letter.
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