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BioInspired Oleophobic Self-Cleaning surfaces for Automotive indoor environment The fast development of new types of mobility based on car sharing, with frequent change of drivers and occupants of the vehicle, reinforces the need for the development of innovative automotive interior materials surfaces with anti-fouling and self-cleaning properties, especially against oily deposits. Based on bioinspired models of superoleophobic surface texture and composition, from natural species such as springtails, the BIOSCA project gathers two research laboratories specialized in bio-inspired surface functionalization, and two major actors of the automotive industry. It combines 1) the preparation and structuration at the nano and micro levels of polymer surfaces, 2) their chemical functionalization to achieve low surface energy, 3) the evaluation of performances on automotive interior materials samples and process industrialization. This applied research project relies on complementary scientific expertises of the academic partners. One research laboratory has developed an expertise to create polymer films exhibiting topographical features such as hierarchical organization and re-entrant roughness or porosity relevant for superoleophobicity. This topography can be achieved by the “breath figure” (BF) process leading to honeycomb films in close-packed hexagonal arrays after fast drying of a polymer solution under a humid air-flow. It can also combine nanoscale self-assembly of diblock copolymers. Another research laboratory, coordinator of the project, is one of the world leaders in the preparation of bioinspired superhydrophobic/suoeroleophobic surfaces thanks to a molecular conception developed from the deposition of polymers to their nanostructural and chemical surface functionalization using electrochemical and plasma-assisted treatments. The industrial partners will select car interior parts of interest for anti-fouling and self-cleaning treatment, and will prepare samples of car interior materials, possibly painted or film-coated. After their surface treatment by the academic partners theses samples will undergo a series of standardized tests to validate and quantify the performance of the process, including its durability after ageing. They will also analyze the technical and economical feasibility of industrializing the process, with environment compliance criteria and cost targets. Possible extension to other car parts and to other industrial sectors will also be examined.
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