CE22 - Mobilité et systèmes urbains durables

BioInspired Oleophobic Self-Cleaning surfaces for Automotive indoor environment – BIOSCA

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.

Objectives and scientific hypotheses

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.

The BIOSCA project will result in the feasibility demonstration of selected physical and chemical processes developed by the academic partners (NICE-Lab and IPREM) to confer superoleophobic properties to samples of materials actually used in automotive interiors and provided by the industrial partners (Renault and Faurecia). Le projet est toujours en cours. Actuellement, IPREM a déjà réalisé un revêtement transparent sur les substrats polymères fournis par Renault et Faurecia. Les revêtements transparents possèdent différentes micro et nano structures. NICE-Lab avait réalisé une post-fonctionnalisation sur les substrats traités par IPREM. Différentes techniques ont été réalisées en utilisant des méthodes plasma et chimiques afin d'améliorer les propriétés autonettoyantes des substrats polymères.

If the BIOSCA research project succeeds in offering a unique solution for the development of self-cleaning surfaces for car interiors it will definitely meets a growing demand for carsharing services. More specifically the market for shared autonomous cars for shuttle services, smart microbuses, feeders for mass transit (last kilometer service) or robotaxis on which Renault has a strategic development program is estimated to amount at least 500 000 vehicles in 2030 (~310 000 for personal car size and ~230 000 for microbus size) according to study by Roland Berger. Cleanliness of such cars or microbuses is a key factor for their attractiveness and public acceptance.

Patent applications and the publication of scientific articles are being prepared.

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.

Project coordinator

Monsieur Frédéric Guittard (Université Nice Sophia Antipolis - N.I.C.E LAB NATURAL INSPIRE CREATIVE ENGINEERS)

The author of this summary is the project coordinator, who is responsible for the content of this summary. The ANR declines any responsibility as for its contents.

Partner

UNS - N.I.C.E LAB Université Nice Sophia Antipolis - N.I.C.E LAB NATURAL INSPIRE CREATIVE ENGINEERS
RENAULT SAS - GUYANCOURT
FAURECIA INTERIEUR INDUSTRIE
IPREM INSTITUT DES SCIENCES ANALYTIQUES ET DE PHYSICO-CHIMIE POUR L'ENVIRONNEMENT ET LES MATERIAUX

Help of the ANR 452,756 euros
Beginning and duration of the scientific project: November 2018 - 36 Months

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