A5090876645- Additive Manufacturing and 3D Printing Technologies
- biodegradable polymer synthesis and properties
- Mechanical Behavior of Composites
- Bone Tissue Engineering Materials
- Textile materials and evaluations
- Polymer Foaming and Composites
- Orthopaedic implants and arthroplasty
- Epoxy Resin Curing Processes
- Manufacturing Process and Optimization
- Natural Fiber Reinforced Composites
- Material Properties and Applications
- Spine and Intervertebral Disc Pathology
- Synthesis and properties of polymers
- Injection Molding Process and Properties
- Structural Analysis of Composite Materials
- Hydrogels: synthesis, properties, applications
- Polymer Nanocomposites and Properties
- Innovations in Concrete and Construction Materials
- Electrospun Nanofibers in Biomedical Applications
- Polymer crystallization and properties
- Musculoskeletal pain and rehabilitation
- Fiber-reinforced polymer composites
- Advanced Cellulose Research Studies
- Bone fractures and treatments
- Advanced Sensor and Energy Harvesting Materials
École Polytechnique Fédérale de Lausanne
2014-2025
University of Lausanne
2020-2021
The integration of shear-thickening fluids (STFs) into composite structures has been investigated with the aim tuning part stiffness and damping capacity under dynamic deformation. Results from oscillatory rheological measurements for a STF based on concentrated fused silica in polypropylene glycol were correlated results vibrating beam tests model sandwich containing layers same sandwiched between polyvinyl chloride (PVC) beams. Above critical amplitude, relative motion PVC beams provoked...
Biocomposite hydrogels with carboxymethylated, nanofibrillated cellulose (c-NFC) powder were prepared by UV polymerization of N-vinyl-2-pyrrolidone Tween 20 trimethacrylate as a cross-linking agent for replacement the native, human nucleus pulposus (NP) in intervertebral disks. The swelling ratios and moduli elasticity compression neat biocomposite evaluated dependence c-NFC concentration (ranging from 0 to 1.6% v/v) degree substitution (DS, ranging 0.23). viscoelastic properties shear...
Despite the development of hydrogels with high mechanical properties, insufficient adhesion between these materials and biological surfaces significantly limits their use in biomedical field. By controlling toughening processes, we designed a composite double-network hydrogel ∼90% water content, which creates dissipative interface robustly adheres to soft tissues such as cartilage meniscus. A matrix composed covalently cross-linked poly(ethylene glycol) dimethacrylate ionically alginate was...
The aim of this investigation was to test the biocompatibility three-dimensional bioresorbable foams made poly(L-lactic acid) (PLA), alone or filled with hydroxyapatite (HA) β-tricalcium phosphate (β-TCP), human primary osteoblasts, using a direct contact method. Porous constructs were processed by supercritical gas foaming, after melt-extrusion ceramic/polymer mixture. Three neat polymer foams, pore sizes 170, 310, and 600 µm, two composite PLA/5 wt% HA β-TCP, examined over 4-week culture...
Abstract 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 and Supercritical CO 2 Foaming. Porous strands related hierarchical processed in one continuous step. Influence parameters (e.g., deposition temperature speed) on foam pores distribution is described for a semicrystalline food grade Poly‐Lactide Acid. The process then applied other...
A model for the consolidation of thermoplastic composites based on commingled yarns was developed. The evolution composite void content during related to processing parameters and material properties. Additionally, analysis relied experimental investigation yarn structure, taking into account a distribution in dry fiber bundle sizes. Residual porosity considered result from pore closing at given stage impregnation. accuracy assessed by conducting experiments using unidirectional fabric made...
Abstract Bone is a natural composite construct, with gradient structure going from loose interconnected cellular core to an outer dense wall, thus minimizing bone weight while keeping high mechanical resistance. Due this unique and complex structure, defects are difficult replace or repair. Tissue engineering aims at providing artificial grafts. Several techniques have been proposed produce porous structures scaffolds, but, as yet, no optimal solutions. This article focuses on bioresorbable...
Abstract Bioresorbable scaffolds made of poly( L ‐lactic acid) (PLA) obtained by supercritical gas foaming were recently described as suitable for tissue engineering, portraying biocompatibility with primary osteoblasts in vitro and interesting mechanical properties when reinforced ceramics. The behavior such constructs remained to be evaluated vivo therefore the present study was undertaken compare different PLA/ceramic composite a critical size defect craniotomy model Sprague–Dawley rats....
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 injectability and need treatment contacting surface. On contrary, injectable photo-curable are highly attractive owing their ease use, flexibility filling any shape, minimally invasive character, compared conventional preformed counterparts. Despite recent advances in material developments, a that exhibits both proper...
In recent years, there has been a growing interest in the development of universal soft grippers that can handle objects varying form factors (including flat objects), surface conditions moistened or oily and mechanical properties (deformable fragile). Yet, is no single gripper gently grip with such wide range properties. Herein, combines granular jamming (GJ) electroadhesion (EA) to grasp release large set diverse presented. The operate GJ mode only, EA combination simultaneously activates...
Abstract Phosphate glass (PG) of the composition 0.46(CaO)–0.04(Na 2 O)–0.5(P O 5 ) was used as filler in poly‐ L ‐lactic acid (PLA) foams developed degradable scaffolds for bone tissue engineering. The effect PG on PLA assessed both bulk and porous composite foams. Composites with various content (0, 5, 10, 20 wt %) were melt‐extruded, either compression‐molded or foamed through supercritical CO . Dynamic mechanical analysis composites showed that incorporating % resulted a significant...
The mechanical and damping properties were measured for unidirectional, 0/90 twill 2/2 flax fibre (FF) composites containing 40 vol% of fibres in an epoxy matrix. All processed by resin transfer moulding. influence the impregnation quality, fibre/matrix adhesion, quality fibres, twist angle FF yarns crimp fabrics on these quantified. Twisted unidirectional fabric impacted negatively stiffness while increasing about 57% through enhancement intra-yarn friction. In fabrics, twisted decreased...