| People | Locations | Statistics |
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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Immonen, Kirsi
VTT Technical Research Centre of Finland
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (29/29 displayed)
- 2025A skeletonization-based approach for individual fiber separation in tomography images of biocomposites
- 2024Effect of unbleached and bleached softwood cellulose pulp fibers on poly(lactic acid) propertiescitations
- 2024Biocomposites through foam-forming of long fiber suspensions
- 2023Effect of accelerated aging on properties of biobased polymer films applicable in printed electronicscitations
- 2022Recycling of 3D Printable Thermoplastic Cellulose-Compositecitations
- 2022Biocomposite modeling by tomographic feature extraction and synthetic microstructure reconstructioncitations
- 2022Novel Cellulose based Composite Material for Thermoplastic processing
- 2021Oriented and annealed poly(lactic acid) films and their performance in flexible printed and hybrid electronicscitations
- 2021Oriented and annealed poly(lactic acid) films and their performance in flexible printed and hybrid electronicscitations
- 2021Thermoplastic Cellulose-Based Compound for Additive Manufacturingcitations
- 2020Feasibility of foam forming technology for producing wood plastic compositescitations
- 2020Impact of stone ground 'V-fines' dispersion and compatibilization on polyethylene wood plastic composites
- 2020Impact of stone ground 'V-fines' dispersion and compatibilization on polyethylene wood plastic composites
- 2020Poly(lactic acid)/pulp fiber compositescitations
- 2020Poly(lactic acid)/pulp fiber composites:The effect of fiber surface modification and hydrothermal aging on viscoelastic and strength propertiescitations
- 2019Material sorting using hyperspectral imaging for biocomposite recycling
- 2018Modelling of hygroexpansion in birch pulp - PLA composites
- 2018Modelling of hygroexpansion in birch pulp - PLA composites:A numerical approach based on X-ray micro-tomography
- 2018Totally bio-based, high-performance wood fibre biocomposites
- 2017Effects of Surfactants on the Preparation of Nanocellulose-PLA Compositescitations
- 2016Predicting stiffness and strength of birch pulp : polylactic acid compositescitations
- 2016Time-resolved X-ray microtomographic measurement of water transport in wood-fibre reinforced composite materialcitations
- 2016Highly porous fibre structures and biocomposites made of mixtures of wood, biopolymers and hemp
- 2016Predicting stiffness and strength of birch pulp:Polylactic acid compositescitations
- 2016Predicting stiffness and strength of birch pulp – Polylactic acid compositescitations
- 2015Improving mechanical properties of novel flax/tannin composites through different chemical treatmentscitations
- 2015Novel hybrid flax reinforced supersap composites in automotive applicationscitations
- 2011Potential of chemo- enzymatically modified CTMP in biocomposites
- 2011Immobilization of Trametes hirsuta laccase into poly(3,4-ethylenedioxythiophene) and polyaniline polymer-matricescitations
Places of action
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article
Oriented and annealed poly(lactic acid) films and their performance in flexible printed and hybrid electronics
Abstract
<jats:p> Flexible and hybrid electronics (FHE) are widely utilized from wearable to automotive applications. Instead of commonly used poly(ethylene terephthalate) (PET) film, bio-based and biodegradable polymer, poly(lactic acid) (PLA), is a most promising novel substrate alternative for FHE. From the point of heat curable conductive inks, the poor heat resistance and inherent brittleness are the major drawbacks of PLA. By increasing the PLA film crystallinity through orientation and annealing, its properties can be improved. Two commercial grades, standard PLA (PLA) and a high heat PLA (hhPLA), plus one stereocomplex PLA (scPLA) blend were used to compare PLA performance with different optical purities and crystallinity for printed FHE. Machine direction orientation (MDO), biaxial orientation (BO) and annealing improved the stability of the laboratory and pilot scale manufactured PLA films. MDO was more effective in improving stiffness and strength while BO resulted in more ductile behaviour. In hhPLA the crystallinity increased from 0% to 50% improving tensile strength by 83%, tensile modulus by 52% and strain at break from 3.7% to 114% with 3 × 3 BO and annealing. The scPLA blend contained homo- and stereocomplex crystallites and a double melting peak behaviour provided higher temperature stability through final melting at 220°C. Its optical transparency reached 95%, remaining high up to 250 nm wavelength. In roll-to-roll printing, the PLA and hhPLA films were dried at 100°C prior the printing and this decreased the MD elongation from 2.55% and 0.27% to 0.00–0.05%. The sheet resistance of printed silver was <40 mΩ/sq with additional drying for printed and hybrid integrated light-emitting diode (LED) foils. Printed LED foils on PLA had dimensional and electrical performance comparable to PET, even though lower drying temperatures were used. </jats:p>