ประกาศรับป เอก สำหรับน้องๆ ที่จบโทแล้วอยากต่อเอกเมืองนอกค่า เอ้า เร่เข้ามา Title of the PhD: Fundamental aspects of intumescent systems for fire protection of steel structures Keywords: Fire Protection, Intumescent systems, Spectroscopy, Rheology, Heat and Mass transfer Name of recruiting organization*: École Nationale Supérieure de Chimie de Lille Unité Matériaux et Transformations (UMET) - UMR-CNRS 8207 Equipe Ingénierie des Systèmes Polymères Cité Scientifique Avenue Mendeleïev CS 90108 59652 Villeneuve dAscq Description of recruiting organization: The laboratory Unité Matériaux et Transformations is a laboratory dedicated to Material science for a large range of applications. It hosts a large portion of the research in Materials Science of the the Université Lille1. The Laboratory includes four research groups: « Therapeutical Materials »; « Physics of Minerals »; « Metallurgy » and «Engineering of Polymeric Systems». The UMET laboratory belongs to a larger consortium, the Fédération de recherche Michel-Eugène Chevreul, that hosts laboratories related to materials science in Northern France. The UMET is one of the three large members of the consortium, that also includes the Unité de Catalyse et de Chimie du Solide (UCCS) and the Laboratoire de Spectrochimie Infrarouge et Raman (LASIR). Among other tasks, the consortium is in charge of running large scale experimental facilities (NMR, electron diffraction, X-ray diffraction, mass spectroscopy, vibrationnal spectroscopy...). The UMET is hosting the Centre of microscopy of Lille within its building and provides the associated technical staff. One of the main topics of the group “Engineering of Polymeric Systems” is the study of reaction and resistance to fire of materials. It works on the development of novel fire resistant and flame retardant system that do not evolve toxic and corrosive smoke in the conditions of fire. Different approaches are considered: intumescence, ceramic-like formation and nanocomposites. ISP/UMET has expertise in: • processing of thermoplastic including extrusion process and injection molding, • formulation development including polymer nanocomposites with and without flame retardants and coatings, • resistance to fire: fire testing and development of novel tests at the lab scale • physico-chemistry of degradation of flame retarded materials including thermogravimetry, differential calorimetry, kinetic of degradation (modeling and simulation), • rheology in complex media of polymeric materials (in particular for characterizing intumescence phenomenon), • characterization of polymers and degraded materials using techniques such as solid state NMR, FTIR, Raman spectroscopy, XPS, ESR, X-ray diffraction, and optical and electronic microscopy, • gas analysis of evolved gases from burning materials. Description: Different methods can be used to improve fire protection of steel and among them intumescent materials. Intumescent coatings represent passive fire protections that swell when subjected to high temperatures leading to the formation of an expanded char layer that limits the heat transfer between the fire source and the substrate. The formation of this char structure is a complicated process involving several critical aspects: rheology (expansion phase, viscoelasticity of char), chemistry (charring) and thermophysic (limitation of heat and mass transfer). Depending on the formulation of the coating, the intumescent phenomenon may vary and thus also the fire protective behavior of the underlying material. One of the main difficulty in this field of investigation consists in identifying, assessing and then coupling the key parameters, such as rheology, thermal conductivity, expansion, kinetics of degradation, phase changes, leading to an efficient protective system. The knowledge and correlations between these parameters are necessary to model accurately the heat transfers and thus to predict the efficiency of the coating. The objective of the project is thus to make an intumescent fire barrier reacting accordingly against thermal constraint mimicking a specific fire scenario. In other words, the dynamic of intumescence must be controlled to develop an insulative material with the appropriate morphology and mechanical properties to resist to external stress (e.g. high convection, high temperature …). From these considerations, the chemistry of the formulations plays the primary role since it provides the ingredients to make the intumescent barrier and it then governs its efficiency. There are numerous chemicals available and for some of them (not to say many of them) their role is not clearly identified. A first step of the project will thus be dedicated to a better understanding of the role of each components of an intumescent formulation. As a second step and based on the results obtained in the first step of this project, design of innovative intumescent materials will be carried out. This project will be realized in collaboration with an International Company. Candidate profile Highly motivated candidates with an academic degree at the Masters level in materials science, chemistry and/or chemical engineering are invited to apply for this position. Interdisciplinary knowledge of the fundamental chemistry and physics of materials, analysis techniques and research design methodologies (such as for example experimental design or principal component analysis) are required. Candidates should have a real interest for experimental science and be able to rationalize resulting data through a simple modeling approach. The knowledge of English is mandatory. Spoken and written French is an asset. Contact: Prof. Serge Bourbigot École Nationale Supérieure de Chimie de Lille Unité Matériaux et Transformations (UMET) - UMR-CNRS 8207 Equipe Ingénierie des Systèmes Polymères Cité Scientifique Avenue Mendeleïev CS 90108 59652 Villeneuve dAscq Phone: +33 (0)3 20 43 48 88 Secretary: +33 (0)3 20 49 25 Fax: +33 (0)3 20 43 65 84 E-mail: [email protected] Job location: École Nationale Supérieure de Chimie de Lille Unité Matériaux et Transformations (UMET) - UMR-CNRS 8207 Equipe Ingénierie des Systèmes Polymères Cité Scientifique Avenue Mendeleïev CS 90108 59652 Villeneuve dAscq Work contract: 3 years contract Type of contract: CDD Gross annual salary range in Euros: ≥ 25,000 and < 35,000€ annual gross
Posted on: Tue, 15 Jul 2014 07:43:01 +0000
Trending Topics
Recently Viewed Topics
© 2015