Publications de Pierre-Etienne Bourban

Helmet material design for mitigating traumatic axonal injuries through AI-driven constitutive law enhancement

Dominique Pioletti, Pierre-Etienne Bourban, Naser Nasrollahzadeh Mamaghani, Vincent Marc Varanges

Sports helmets provide incomplete protection against brain injuries. Here we aim to improve helmet liner efficiency by employing a novel approach that optimizes their properties. By exploiting a finite element model that simulates head impacts, we develope ...

2025

Development and Performance Evaluation of Hybrid Iono-organogels for Efficient Impact Mitigation

Dominique Pioletti, Pierre-Etienne Bourban, Vincent Marc Varanges, Vijay Kumar Rana

Dissipative materials are essential for mitigating impact in various automotive, aerospace, and sports equipment applications. This study investigates the efficiency of a novel hybrid iono-organogel in dissipating and absorbing impact energies. The gel con ...

American Chemical Society (ACS)2024

A Soft Gripper with Granular Jamming and Electroadhesive Properties

Pierre-Etienne Bourban, Dario Floreano, Jun Shintake, Vivek Ramachandran, Yegor Piskarev

In recent years, there has been a growing interest in the development of universal soft grippers that can handle objects of varying form factors (including flat objects), surface conditions (including moistened or oily objects), and mechanical properties ( ...

2023

An Injectable Family Of Soft Tissue Hydrogel Adhesives For Knee Applications

Dominique Pioletti, Pierre-Etienne Bourban, Christophe Moser, Céline Samira Wyss, Peyman Karami

MARY ANN LIEBERT, INC2022

An Intrinsically-Adhesive Family of Injectable and Photo-Curable Hydrogels with Functional Physicochemical Performance for Regenerative Medicine

Dominique Pioletti, Pierre-Etienne Bourban, Christophe Moser, Céline Samira Wyss, Naser Nasrollahzadeh Mamaghani, Peyman Karami

Attaching hydrogels to soft internal tissues is crucial for the development of various biomedical devices. Tough sticky hydrogel patches present high adhesion, yet with lack of injectability and the need for treatment of contacting surface. On the contrary ...

WILEY-V C H VERLAG GMBH2021

Silk granular hydrogels self-reinforced with regenerated silk fibroin fibers

Dominique Pioletti, Pierre-Etienne Bourban, Céline Samira Wyss, Peyman Karami, Adrien Julien Demongeot

Granular hydrogels with high stability, strength, and toughness are laborious to develop. Post-curing is often employed to bind microgels chemically and enhance mechanical properties. Here a unique strategy was investigated to maintain microgels together w ...

2021

Hybrid granular hydrogels: combining composites and microgels for extended ranges of material properties

Dominique Pioletti, Pierre-Etienne Bourban, Céline Samira Wyss, Peyman Karami

Developing hydrogels with optimal properties for specific applications is challenging as most of these properties, such as toughness, stiffness, swelling or deformability, are interrelated. The improvement of one property usually comes at the cost of anoth ...

2020

Cross-linkable polymer, hydrogel, and method of preparation thereof

Dominique Pioletti, Pierre-Etienne Bourban, Christophe Moser, Céline Samira Wyss, Peyman Karami

The invention relates to a cross-linkable polymer comprising a base polymer comprising functional groups at least some of which have been reacted with a first organic molecule comprising a cross-linkable unit and with a second organic molecule capable of b ...

2020

Cyclic loading of a cellulose/hydrogel composite increases its fracture strength

Dominique Pioletti, Pierre-Etienne Bourban, Céline Samira Wyss, Peyman Karami

The fracture properties of hydrogels which present similar characteristics to the Mullins effect is expected to decrease under repeated cyclic loading. Therefore, we assessed how cyclic loading affects the fracture behavior, the distribution of strain fiel ...

2018

Composite Double-Network Hydrogels To Improve Adhesion on Biological Surfaces

Dominique Pioletti, Pierre-Etienne Bourban, Andreas Schmocker, Azadeh Khoushabi, Christophe Moser, Céline Samira Wyss, Martin Broome, Peyman Karami

Despite the development of hydrogels with high mechanical properties, insufficient adhesion between these materials and biological surfaces significantly limits their use in the biomedical field. By controlling toughening processes, we designed a composite ...

2018

Tailoring swelling to control softening mechanisms during cyclic loading of PEG/cellulose hydrogel composites

Dominique Pioletti, Pierre-Etienne Bourban, Azadeh Khoushabi, Céline Samira Wyss, Baris Çaglar

One of the novel approaches for discogenic lower back pain treatment is to permanently replace the core of the intervertebral disc, so-called Nucleus Pulposus, through minimally invasive surgery. Recently, we have proposed Poly(Ethylene Glycol) Dimethacryl ...

2018

Depth-dependent mechanical properties of human articular cartilage obtained by indentation measurements

Pierre-Etienne Bourban, Lee Ann Laurent-Applegate, Matteo Gregorio Modesto Marascio, Jens Antons, Robin Martin

Emerging 3D printing technology permits innovative approaches to manufacture cartilage scaffolds associated with layer-by-layer mechanical property adaptation. However, information about gradients of mechanical properties in human articular cartilage is li ...

2018

Hierarchical porous structure

Dominique Pioletti, Pierre-Etienne Bourban, Matteo Gregorio Modesto Marascio

Cellular thermoplastic structures with hierarchical multi-scale porosity (preferably 1-300 µm micro-porosity to 0.3-10 mm macro-porosity) are produced from an integrated approach of 3D printing, preferably by Fused Deposition Modeling (FDM), and of supercr ...

2018

Morphology and interfacial strength of nonisothermally fusion bonded hard and soft thermoplastics

Pierre-Etienne Bourban, Rajasundar Chandran

Nonisothermally fusion bonded butt joints were prepared by overmolding thermoplastic elastomers (TPEs) onto isotactic polypropylene (iPP) inserts in order to investigate the effect of processing conditions on the bond strength and interfacial microstructur ...

2018

Decellularised tissues obtained by a CO2-philic detergent and supercritical CO2

Dominique Pioletti, Pierre-Etienne Bourban, Nathalie Hirt-Burri, Matteo Gregorio Modesto Marascio, Jens Antons, Pierre-Arnaud Aeberhard, Giulia Weissenberger

Tissue decellularisation has gained much attention in regenerative medicine as an alternative to synthetic materials. In decellularised tissues, biological cues can be maintained and provide cellular environments still unmet by synthetic materials. Supercr ...

2018

3D Printing of Polymers with Hierarchical Continuous Porosity

Dominique Pioletti, Pierre-Etienne Bourban, Matteo Gregorio Modesto Marascio, Jens Antons

Cellular thermoplastic structures with multiscale porosity (1–300 µm microporosity to 0.3–10 mm macroporosity) are produced from an integrated approach of 3D printing by Fused Deposition Modeling printing and Supercritical CO2 Foaming. Porous strands and r ...

Wiley2017

Curing kinetics and thermomechanical properties of latent epoxy/carbon fiber composites

Pierre-Etienne Bourban, Véronique Michaud, Sara Dalle Vacche

In this work, resins based on diglycidyl ether of bisphenol A (DGEBA) epoxy and a latent hardener, dicyandiamide (DICY), as well as carbon fiber (CF) composites based on them, were prepared with three commercial accelerators: a methylene bis (phenyl dimeth ...

Iop Publishing Ltd2016

Device for photoactivation and reaction monitoring

Dominique Pioletti, Pierre-Etienne Bourban, Andreas Schmocker, Christophe Moser

The present invention relates to a device to photocure and/or photoactivate a photosensitive material. The device comprises several subsystems to transmit light towards an area of interest where a photosensitive material is applied as well as to collect li ...

2016

A photopolymerized composite hydrogel and surgical implanting tool for a nucleus pulposus replacement

Dominique Pioletti, Pierre-Etienne Bourban, Andreas Schmocker, Azadeh Khoushabi, Christophe Moser

Nucleus pulposus replacements have been subjected to highly controversial discussions over the last 40 years. Their use has not yet resulted in a positive outcome to treat herniated disc or degenerated disc disease. The main reason is that not a single imp ...

Elsevier2016

Influence of processing routes on morphology and low strain stiffness of polymer/nanofibrillated cellulose composites

Pierre-Etienne Bourban, Yves Leterrier, John Christopher Plummer, Lars Berglund, Sylvain Cyril Claude Galland

The morphology of polymer/nanofibrillated cellulose (NFC) composite sheets produced using different techniques and its influence on low strain stiffness were assessed by optical and transmission electron microscopy. Solvent processing led to relatively hom ...

Maney Publishing2015