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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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Ansell, Martin
University of Bath
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (13/13 displayed)
- 2020Physico-chemical Characterization and Development of Hemp Aggregates for Highly Insulating Construction Building Materialscitations
- 2019Comparative moisture and heat sorption properties of fibre and shiv derived from hemp and flaxcitations
- 2019Development of novel building composites based on hemp and multi-functional silica matrixcitations
- 2018Cell wall microstructure, pore size distribution and absolute density of hemp shivcitations
- 2018Comparative moisture and heat sorption properties of fibre and shiv derived from hemp and flaxcitations
- 2017Physical characterisation of hemp shiv: Cell wall structure and porosity
- 2017Physical characterisation of hemp shiv
- 2016Influence of eco-materials on Indoor Air Qualitycitations
- 2016The effects of sol-gel silicates on hydration kinetics and microstructure of Portland cement systems
- 2015Sol-Gel Technology as a Seeding Agent for Portland Cement Systems
- 2011Adiabatic shear band formation as a result of cryogenic CNC machining of elastomerscitations
- 2010The formation of adiabatic shear bands as a result of cryogenic CNC machining of elastomerscitations
- 2010Development of non-metallic timber connections for contemporary applications
Places of action
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article
Cell wall microstructure, pore size distribution and absolute density of hemp shiv
Abstract
<p>This paper, for the first time, fully characterizes the intrinsic physical parameters of hemp shiv including cell wall microstructure, pore size distribution and absolute density. Scanning electron microscopy revealed microstructural features similar to hardwoods. Confocal microscopy revealed three major layers in the cell wall: middle lamella, primary cell wall and secondary cell wall. Computed tomography improved the visualization of pore shape and pore connectivity in three dimensions. Mercury intrusion porosimetry (MIP) showed that the average accessible porosity was 76.67 ± 2.03% and pore size classes could be distinguished into micropores (3–10 nm) and macropores (0.1–1 µm and 20–80 µm). The absolute density was evaluated by helium pycnometry, MIP and Archimedes’ methods. The results show that these methods can lead to misinterpretation of absolute density. The MIP method showed a realistic absolute density (1.45 g cm<sup>−3</sup>) consistent with the density of the known constituents, including lignin, cellulose and hemi-cellulose. However, helium pycnometry and Archimedes’ methods gave falsely low values owing to 10% of the volume being inaccessible pores, which require sample pretreatment in order to be filled by liquid or gas. This indicates that the determination of the cell wall density is strongly dependent on sample geometry and preparation.</p>