| 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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Torvinen, Katariina
VTT Technical Research Centre of Finland
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (9/9 displayed)
- 2020Feasibility of foam forming technology for producing wood plastic compositescitations
- 2018Detection of iron and iron-cobalt labeled cellulose nanofibrils using ICP-OES and XμCTcitations
- 2017Novel biobased micro- and nanomaterials in porous foam formed structures
- 2016Highly porous fibre structures and biocomposites made of mixtures of wood, biopolymers and hemp
- 2014Drying of Pigment-Cellulose Nanofibril Substratescitations
- 2014Flexible pigment-nanocellulose substrate for printed electronics with good thermal tolerance
- 2013Flexible bio-based pigment-nanocellulose substrate for printed electronics with good thermal tolerance
- 2012Flexible bio-based pigment nanocellulose substrate for printed electronics
- 2012Smooth and flexible filler-nanocellulose composite structure for printed electronics applicationscitations
Places of action
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document
Highly porous fibre structures and biocomposites made of mixtures of wood, biopolymers and hemp
Abstract
Highly porous structures made by foam forming techniquefrom natural fibres have several possible futureapplications. Among these are acoustic materials orcushioning elements in packages. Certain compressionstrength level is needed in both applications. Weinvestigated the effect of fibre length distribution onthe compression strength using hemp bast fibres as longfibres, softwood cellulose as medium length fibres andlignin-rich fines made from spruce wood as the microfibre component. In addition wooden-like hemp shives wereused. The fibre mixtures were foamed with two differenttypes of surfactants: an anionic sodium dodecyl sulphate(SDS) surfactant that has a neutral effect on materialbonding and a non-ionic polyvinyl alcohol (PVA)surfactant that enhances bonding.Lignin-rich fines improved the compression strength inall fibre mixtures when SDS was used as the foamingsurfactant. The significance of fines addition was minorwith materials foamed with PVA. Long hemp bast fibresdecreased the compression strength with both surfactants.Addition of stiff hemp shives with bonding enhancingsurfactant resulted in good compression strength.Overall, surfactant selection between a bonding andnon-bonding one had a larger effect on the compressionstrength compared to the selected fibre types and fibremixtures.Hemp is one of the annual crops, which use has increasedin different applications in recent years. Thetraditional use of hemp fibre is in textiles, but the usein different composites, nonwovens and even medicalapplications has increased. Hemp fibre in plant islocated in stem and it's mechanical performance iscomparable to glass fibre properties making it goodchoice for reinforcement in biocomposites. We studiedhemp fibre and shive in different potential applicationsfrom composites to non-woven structures and hemp basednanocelluloses in order to find potential novel uses forhemp.According to the preliminary results hemp fibre andshives are potential raw materials in natural-fibreplastic composites. In strength point of view it competeswith other cellulose based composites and gives newvisual design aspects for the material. Nanocellulosemade of hemp fibres formed highly viscous hydrogel, whichis attractive as a reinforcing component, rheologymodifier and film forming material. Their characteristicscan be further improved by chemical pre-treatments. Hempbased nanocelluloses have similar or even bettercharacteristics compared to the commercial and wood-basednanocelluloses.