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PEOPLE@HES-SO – Annuaire et Répertoire des compétences
PEOPLE@HES-SO – Annuaire et Répertoire des compétences

PEOPLE@HES-SO
Annuaire et Répertoire des compétences

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Mauron Muriel

Mauron Muriel

Collaboratrice scientifique HES

Compétences principales

Bioprinting

Inkjet

Mammalian cell culture

Ink caracterization

Surface energy

Hydrogels

Printing and Coating

  • Contact

  • Publications

  • Conférences

Contrat principal

Collaboratrice scientifique HES

Téléphone: +41 26 429 66 42

Bureau: MIC_10_160

Haute école d'ingénierie et d'architecture de Fribourg
Boulevard de Pérolles 80, 1700 Fribourg, CH
HEIA-FR
Institut
iPrint - Institut de printing
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2024

Multimaterial inkjet printing of mechanochromic materials
Article scientifique ArODES

Muriel Mauron, Lucie Castens Vitanov, César Michaud, Raphaël Wenger, Nicolas Muller, Roseline Nussbaumer, Céline Calvino, Christoph Weder, Stephen Schrettl, Gilbert Gugler, Derek John Kiebala

The European Physical Journal Special Topics,  2024

Lien vers la publication

Résumé:

Inkjet printing technology achieves the precise deposition of liquid-phase materials via the digitally controlled formation of picoliter-sized droplets. Beyond graphical printing, inkjet printing has been employed for the deposition of separated drops on surfaces or the formation of continuous layers, which allows to construct materials gradients or periodic features that provide enhanced functionalities. Here, we explore the use of multinozzle, drop-on-demand piezoelectric inkjet technology for the manufacturing of mechanochromic materials, i.e., materials that change their color or fluorescence in response to mechanical deformation. To accomplish this, suitable polyurethane polymers of differing hardness grades were tested with a range of organic solvents to formulate low-viscosity, inkjet-printable solutions. Following their rheological characterization, two solutions comprising “soft” and “hard” polyurethanes were selected for in-depth study. The solutions were imbibed with a mechanochromic additive to yield fluorescent inks, which were either dropcast onto polymeric substrates or printed to form checkerboard patterns of alternating hardness using a laboratory-built, multimaterial inkjet platform. Fluorescence imaging and spectroscopy were used to identify different hardness grades in the dropcast and printed materials, as well as to monitor the responses of these gradient materials to mechanical deformation. The insights gained in this study are expected to facilitate the development of inkjet-printable, mechanochromic polymer materials for a wide range of applications.

2024

Smart materials by Inkjet
Conférence ArODES

Muriel Mauron, Lucie Castens Vitanov, César Michaud, Raphaël Wenger, Derek Kiebala, Roseline Nussbaumer, Gilbert Gugler, Stephen Schrett

Proceedings of the Advanced Inkjet Technology Conference, 29-31 January 2024, Fribourg, Switzerland

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Résumé:

There is growing interest in voxelated matter as it allows to build up tailored made surface functionalization and innovative new gradient materials. Inkjet-based printing is the only method that can create voxelated materials with high precision, digital and extremely versatile through high controlled formation of small pico-liter droplets [1, 2]. In this case the droplet will be the smallest material unit called voxel. The spatially controlled deposition allows to functionalize surfaces, build materials gradients, and combine different materials to generate printed surfaces with new features. In this way, the preparation of surfaces and coatings with a tailored functionalization and performance on demand becomes possible. Through the vehicle of inks with different softness grades which are doped with mechanochromic additive, we have developed a multi-material inkjet platform, which allows to create gradient materials with new performance. The additive has helped to characterize this new kind of materials on one hand and on the other hand it will be the start of creating new smart materials with gradient properties by inkjet. The first drop casting tests of these two inks has proven the mechanochromism by the measurement of the ratio between the intensity of the monomer and the excimer under UV light. The intensity in the mixing zone was measured at different strain. Finally, it was proven that the hardness in the mixing zone could be defined.

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