Master Student Internship in Improving fibre-matrix compatibilization in sustainable thermoplastic composite (M/F)

Reference : MRT-2020-Intern-016

Type: Intern
Contract type: Internship
Duration: 6 months
Place: Hautcharage

Context

 

Through its research into advanced materials and processes, the “Materials Research and Technology” (MRT) Department with is 170 researchers and engineers, to the emergence of enabling technologies that underpin the innovation processes of local and international industry. MRT’s activities hinge on three thematic pillars: nanomaterials and nanotechnology, sustainable composite materials and manufacturing and process technologies, including scientific instrumentation. Interfaces in composites play a key role in many areas such as automotive sector, technical textiles. This is particularly the case in polymer composites whose performances are mainly driven by the interface and interphase integrity. In this area, the challenge is to develop new approaches to improve interfacial adhesion between symetric and dyssimetric materials and on the opposite to promote disassembly to fit to recycling issues.

 

Description

 

The current environmental concerns on structural composite imply the utilization of polymer matrices allowing new thermoforming possibilities and sustainable end-of-life scenarios. To this end, a great attention was recently paid to the development of liquid thermoplastic acrylic resin based on methyl methacrylate monomer (MMA) that polymerized in-situ during composite manufacturing by vacuum-assisted infusion or resin transfer moulding. The use of such matrices enables novel possibilities of thermoforming and post-thermoforming (welding and gluing) compared to conventional thermoset resins. In addition, they can be recovered into monomers/oligomers by a simple thermal treatment, which was not possible with conventional thermoset resins. However, the compatibilization between the reinforcing agents and the matrix has never been tackled by a comprehensive study, resulting in a non-optimal mechanical performance. The current works focuses on acrylic-natural fibre composite as model sustainable composite. The objectives of this internship are obtaining the highest mechanical properties for this composite and understanding the underlying mechanisms, based on the following interconnected tasks:

  • Optimizing the current formulations of sizing treatments for natural fibres based on existing technologies at LIST, varying the formulation and concentration in adhesion promoters
  • Applying the new sizing onto the fibres and analysing the new surface chemistry and physics
  • Manufacturing UD composite coupons by vacuum assisted resin transfer moulding
  • Structural and mechanical testing of the UD composite

Concerning the project follow-ups, it will be asked to prepare powerpoint presentations that will be regularly updated with new results. Last, 3 reports (state of the art, intermediate report and final report) will have to be prepared.

 


Profile

 

Education

  • Master 1 or Master 2 in Material Chemistry  

Competencies

  • Hands on laboratory techniques and methods to synthesize/modify well-defined macromolecular architectures (macromolecular engineering)
  • Knowledge on polymer and composite materials would be an asset  

Language

  • English is required

 

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MRT-2020-Intern-016


 

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Contact

Dr Frédéric ADDIEGO
Dr Frédéric ADDIEGO

Dr Grégory MERTZ
Dr Grégory MERTZ