| 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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Eder, Michaela
Max Planck Institute of Colloids and Interfaces
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (15/15 displayed)
- 2025Material Composition Gradient Controls the Autonomous Opening of Banksia Seed Pods in Fire‐Prone Habitats
- 2022Cellulose lattice strains and stress transfer in native and delignified woodcitations
- 2021Wood and the activity of dead tissuecitations
- 2021In situ observation of shrinking and swelling of normal and compression Chinese fir wood at the tissue, cell and cell wall levelcitations
- 2021Comparative studies on wood structure and microtensile properties between compression and opposite wood fibers of Chinese fir plantationcitations
- 2020Wood and the Activity of Dead Tissuecitations
- 2018Biological composites—complex structures for functional diversitycitations
- 2018Climate-Dependent Heat-Triggered Opening Mechanism of Banksia Seed Podscitations
- 2018Temperature-induced self-sealing capability of Banksia folliclescitations
- 2015Characterizing moisture-dependent mechanical properties of organic materialscitations
- 2014Measuring the distribution of cellulose microfibril angles in primary cell walls by small angle X-ray scatteringcitations
- 2013Influence of the polymeric interphase design on the interfacial properties of (fiber-reinforced) compositescitations
- 2012Reorientation of cellulose nanowhiskers in agarose hydrogels under tensile loadingcitations
- 2012Experimental micromechanical characterization of wood cell walls
- 2010Cellulose microfibril orientation of Picea abies and its variability at the micron-level determined by Raman imagingcitations
Places of action
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article
Characterizing moisture-dependent mechanical properties of organic materials
Abstract
<p>Nanoindentation is an ideal technique to study local mechanical properties of a wide range of materials on the sub-micron scale. It has been widely used to investigate biological materials in the dry state; however, their properties are strongly affected by their moisture content, which until now has not been consistently controlled. In the present study, we developed an experimental set-up for measuring local mechanical properties of materials by nanoindentation in a controlled environment of relative humidity (RH) and temperature. The significance of this new approach in studying biological materials was demonstrated for the secondary cell wall layer (S2) in Spruce wood (Picea abies). The hardness of the cell wall layer decreased from an average of approximately 0.6 GPa at 6% RH down to approximately 0.2 GPa at 79% RH, corresponding to a reduction by a factor of 3. Under the same conditions, the indentation modulus also decreased by about 40%. The newly designed experimental set-up has a strong potential for a variety of applications involving the temperature- and humidity-dependent properties of biological and artificial organic nanocomposites.</p>