A5027550823- Advanced Cellulose Research Studies
- Nanocomposite Films for Food Packaging
- biodegradable polymer synthesis and properties
- Electrospun Nanofibers in Biomedical Applications
- Natural Fiber Reinforced Composites
- 3D Printing in Biomedical Research
- Lignin and Wood Chemistry
- Advanced Sensor and Energy Harvesting Materials
- Additive Manufacturing and 3D Printing Technologies
- Bone Tissue Engineering Materials
- Innovations in Concrete and Construction Materials
- Surface Modification and Superhydrophobicity
- Fuel Cells and Related Materials
- Polysaccharides and Plant Cell Walls
- Hydrogels: synthesis, properties, applications
- Polymer composites and self-healing
- Biofuel production and bioconversion
- Polymer Nanocomposites and Properties
- Catalysis and Hydrodesulfurization Studies
- Postharvest Quality and Shelf Life Management
- Electrocatalysts for Energy Conversion
- Dielectric materials and actuators
- Advanced Materials and Mechanics
- Polymer crystallization and properties
Aalto University
2021-2022
KTH Royal Institute of Technology
2021-2022
GAIKER Technology Centre
2022
Technical University of Denmark
2016-2020
University of the Basque Country
2012-2016
Danish Gas Technology Centre (Denmark)
2015
One of the major challenges in producing large scale engineered tissue is lack ability to create highly perfused scaffolds which cells can grow at a high cell density and viability. Here, we explore 3D printed polyvinyl alcohol (PVA) as sacrificial mould polymer casting process. The PVA network defines channels dissolved after curing casted around it. printing parameters determined filament structure this resulted different stiffness corresponding elastomer replica. It was possible achieve...
Abstract Poly(lactic acid) ( PLA )‐based hybrid nanocomposites , nanoclay and nanocellulose) were prepared by reinforcing neat with commercially available (Cloisite C30B ) nanocellulose, in the form of either partially acetylated cellulose nanofibres CNFs or nanocrystalline cellulose. Composites 1 5 wt% combination 1, 3 nanoclay, prepared, their barrier properties investigated. It was found that clay nanocellulose clearly resulted synergistic behaviour terms oxygen transmission rate OTR...
Direct-ink-writing (DIW) of hydrogels has become an attractive research area due to its capability fabricate intricate, complex, and highly customizable structures at ambient conditions for various applications, including biomedical purposes. In the current study, cellulose nanofibrils reinforced aloe vera bio-hydrogels were utilized develop 3D geometries through DIW technique. The revealed excellent viscoelastic properties enabled extruding thin filaments a nozzle with diameter 630 μm....
Lignin is introduced as a suitable component for selective laser sintering (SLS) of polyamide (PA12) to reduce costs while maintaining or improving processability and performance. Alkali lignin (sourced polydisperse, amorphous powder) was used at volume concentration up 60 vol % three-dimensional (3D) printing complex, layered structures. The latter were obtained high axial aspect objects, produced in flat, flipped (90°), vertical directions, which further examined elucidate the effect SLS....
In this paper, for the first time, it is studied synergetic properties of two different grades nanocelluloses with chemical compositions (cellulose nanofibrils-CNF less than 1% lignin and lignocellulose nanofibrils-LCNF 16% lignin). CNF LCNF were mixed in ratios to obtain bi-component films. Their performance terms transparency, bioactivity, thermo-mechanical gas barrier was evaluated compared neat The presence formulations conferred antioxidant UV blocking films, as well improved mechanical...
ABSTRACT Partially acetylated cellulose nanofibers (CNF) were chemically extracted from sisal fibers and the performance of those CNF as nanofillers for polylactide (PLA) food packaging applications was evaluated. Three PLA nanocomposites; PLA/CNF (cellulose nanofibers), PLA/CNC (nanocrystalline cellulose), PLA/C30B (Cloisite TM 30B, an organically modified montmorillonite clay) prepared their properties It found that reinforced composites showed a larger decrease on oxygen transmission rate...
The effects of crystalline morphology and presence nanoparticles such as cellulose nanofibers (CNFs), organically modified nanoclay (C30B), or a combination both on water vapor sorption diffusion in polylactide (PLA) were evaluated by quartz spring microbalance (QSM). It was found that the large spherulite size induced high-temperature processing leads to an increase substantial reduction with increasing crystallinity. Contrarily, small-sized spherulites, arising after low-temperature during...
Presented herein is the integral valorization of residual biomass to film composites by their fractionation into building blocks in a multicomponent cascade isolation approach. First, pine cones were subjected alkaline pretreatment, followed soda pulping. Two different hemicellulose/lignin-based fractions recovered from extractives these treatments, with yield 19%. Then, chloride- and peroxide-based bleaching methods proposed treat soda-pulped samples, obtaining two cellulose-rich chemical...
Scaffolds with multiple functionalities have attracted widespread attention in the field of tissue engineering due to their ability control cell behavior through various cues, including mechanical, chemical, and electrical. Fabrication such scaffolds from clinically approved materials is currently a huge challenge. The goal this work was fabricate scaffold capability delivering biomolecules direct fate. We used simple 3D printing approach, that combines polymer casting supercritical fluid...
The current study was performed to synthesize a series of renewable polyamide 614/organoclay nanocomposites (PAC) with the improved structural, mechanical, and thermal properties via in-situ polymerization. uniform dispersion exfoliation clay into PA614 matrix, particularly at lower loading organoclay (less than 3%), confirmed structural analyses (XRD, SEM, TEM). Furthermore, mechanical tests revealed remarkable improvement; namely, tensile strength storage modulus increased by 27% 30%,...
Large amount of wheat proteins by-products are produced during starch manufacture. This work aimed to develop edible films cast aqueous (WP) and alginate (Al) solutions. The investigation the microstructure Al/WP revealed a more compacted cross-section homogeneous surface, comparatively Al films. Those properties could be modified with increase WP concentration from 4 8 % w/v, as result electrostatic interactions between Al. Furthermore, incorporation provided UltraViolet-blocking behaviour...
The present study proposed a series of sustainable polyamide/cellulose composites with up to 60% bio-based content address environmental issues arising from using fossil-based polymers. Furthermore, it addressed one the most challenging cellulose/polymer composites' issues, filler/matrix compatibility. Accordingly, microcrystalline cellulose (MCC) surface was treated through grafting n-octadecyl isocyanate (ODI) molecules. elemental analysis confirmed substitution approximately 9 ODI...
In the present work, faba bean protein (FBP) films plasticized with glycerol and reinforced different amounts (2.5, 5.0, 7.5 10% by weight of FBP) lignin extracted from pine cones (PL) have been obtained solution casting. The results showed an elongation at break 111.7% addition 5% PL to FBP film, which represents increase 107% compared control film. On other hand, it was observed thermogravimetric analysis (TGA) that incorporation improved thermal stability leading in degradation...
ABSTRACT Here, we present how processing (solvent casting or isothermal crystallization) impacts crystallinity of poly(lactic acid) (PLA) and its nanocomposites (PLA/1 wt % cellulose nanofibers (CNFs), PLA/1 nanoclay (C30B) CNF/1 C30B. Polarized optical microscopy demonstrated a heterogeneous nucleation process during crystallization leading to smaller homogeneously distributed spherulites. With solvent casting, no effect on morphology was observed with respect the nanoparticles, but an...
Today's consumer electronics are made from nonrenewable and toxic components. They also rigid, bulky, manufactured in an energy-inefficient manner via CO2-generating routes. Though petroleum-based polymers such as polyethylene terephthalate naphthalate can address the rigidity issue, they have a large carbon footprint generate harmful waste. Scalable routes for manufacturing that both flexible ecofriendly (Fleco) could challenges field. Ideally, substrates must incorporate into without...
Osmotic dehydration (OD) was introduced as a method to reproducibly tune the water content and porosity of cellulose nanofiber (CNF) hydrogels. The hierarchical followed by electron microscopy (pores with >100 μm diameter) thermoporosimetry (mesopores), together mechanical testing, in hydrogels solid contents ranging from 0.7 12 wt %. Furthermore, reciprocal correlation between proton conductivity ratio bound nanocellulose network established, suggesting potential these systems toward...
We developed a 3D-printing process based on thermoset biocomposites termed Delayed Extrusion of Cold Masterbatch (DECMA). DECMA is processing method, controlling the degree curing, that takes some responsibility 3D printing from materials and as such can be used to print otherwise unprintable materials. First, masterbatch was produced by mixing bio-based resin (bioepoxy) sawdust lignin. This paste partially cured at room temperature until reaching an apparent viscosity suitable for extrusion...
A better understanding of the relation between structure and function cellulose-based hierarchical materials could provide opportunity for developing new multi-functional composite designing nanostructured structurally optimised, by using biodegradable renewable reinforcing materials.In this paper, recent advances in our Group relating to study nanocomposites reinforced with natural cellulose nano-entities, from both vegetal bacterial sources, are presented.Extraction process nanofibres...