@article{brinker_influence_2025,
	title = {Influence of screened fibre fractions on the properties of insulation panels made of different wood species},
	issn = {1748-0272, 1748-0280},
	url = {https://www.tandfonline.com/doi/full/10.1080/17480272.2025.2452206},
	doi = {10.1080/17480272.2025.2452206},
	abstract = {The aim of this study was to produce wood fibre insulation panels (WFIP) from under-utilised wood species and to investigate how various fibre fractions and fibre dimensional distributions affect the hygricmechanical properties and thermal conductivity. Thermo-mechanical pulping (TMP) fibres from five wood species were separated into three fractions (unscreened, course, fine) using a tumbler screening machine. Rigid insulation panels with a target density of 110 kg m-3 were produced using 5 wt\% polymeric diphenylmethane diisocyanate (pMDI) adhesive. Panels made from softwood fibres with a lower bulk density showed a different type of density profile compared to those made from hardwood fibres. The pattern of mean fibre length distribution density (q1) was similar for pine and larch as well as for beech and oak and was reflected in similar compression strength of the WFIP from the corresponding fractions. Water absorption was dependent on the wood species, irrespective of the fibre fraction. The hardwood panels (beech, oak) had a higher thermal conductivity (TC) than the softwood panels (spruce, pine, larch). The coarse fibre panels tended to have a higher TC than the fine fibre panels. Overall, the wood species and screening variants could be used to produce WFIP for indoor use.},
	language = {en},
	urldate = {2025-02-11},
	journal = {Wood Material Science \& Engineering},
	author = {Brinker, Sascha and Ahrens, Christian and Gurnik, Michael and Mayer, Aaron Kilian and Mai, Carsten},
	month = jan,
	year = {2025},
	pages = {1--11},
	file = {Brinker et al. - 2025 - Influence of screened fibre fractions on the prope.pdf:/home/maicher/Zotero/storage/XFEPZKMT/Brinker et al. - 2025 - Influence of screened fibre fractions on the prope.pdf:application/pdf},
}

The aim of this study was to produce wood fibre insulation panels (WFIP) from under-utilised wood species and to investigate how various fibre fractions and fibre dimensional distributions affect the hygricmechanical properties and thermal conductivity. Thermo-mechanical pulping (TMP) fibres from five wood species were separated into three fractions (unscreened, course, fine) using a tumbler screening machine. Rigid insulation panels with a target density of 110 kg m-3 were produced using 5 wt% polymeric diphenylmethane diisocyanate (pMDI) adhesive. Panels made from softwood fibres with a lower bulk density showed a different type of density profile compared to those made from hardwood fibres. The pattern of mean fibre length distribution density (q1) was similar for pine and larch as well as for beech and oak and was reflected in similar compression strength of the WFIP from the corresponding fractions. Water absorption was dependent on the wood species, irrespective of the fibre fraction. The hardwood panels (beech, oak) had a higher thermal conductivity (TC) than the softwood panels (spruce, pine, larch). The coarse fibre panels tended to have a higher TC than the fine fibre panels. Overall, the wood species and screening variants could be used to produce WFIP for indoor use.

@article{brinker_influence_2025-1,
	title = {Influence of screened fibre fractions on the properties of insulation panels made of different wood species},
	volume = {0},
	issn = {1748-0272},
	url = {https://doi.org/10.1080/17480272.2025.2452206},
	doi = {10.1080/17480272.2025.2452206},
	abstract = {The aim of this study was to produce wood fibre insulation panels (WFIP) from under-utilised wood species and to investigate how various fibre fractions and fibre dimensional distributions affect the hygricmechanical properties and thermal conductivity. Thermo-mechanical pulping (TMP) fibres from five wood species were separated into three fractions (unscreened, course, fine) using a tumbler screening machine. Rigid insulation panels with a target density of 110 kg m-3 were produced using 5 wt\% polymeric diphenylmethane diisocyanate (pMDI) adhesive. Panels made from softwood fibres with a lower bulk density showed a different type of density profile compared to those made from hardwood fibres. The pattern of mean fibre length distribution density (q1) was similar for pine and larch as well as for beech and oak and was reflected in similar compression strength of the WFIP from the corresponding fractions. Water absorption was dependent on the wood species, irrespective of the fibre fraction. The hardwood panels (beech, oak) had a higher thermal conductivity (TC) than the softwood panels (spruce, pine, larch). The coarse fibre panels tended to have a higher TC than the fine fibre panels. Overall, the wood species and screening variants could be used to produce WFIP for indoor use.},
	number = {0},
	urldate = {2025-02-09},
	journal = {Wood Material Science \& Engineering},
	author = {Brinker, Sascha and Ahrens, Christian and Gurnik, Michael and Mayer, Aaron Kilian and Mai, Carsten},
	year = {2025},
	note = {Publisher: Taylor \& Francis
\_eprint: https://doi.org/10.1080/17480272.2025.2452206},
	keywords = {screening, Hardwood fibres, thermal conductivity, wood fibre insulation panels (WFIP)},
	pages = {1--11},
}

The aim of this study was to produce wood fibre insulation panels (WFIP) from under-utilised wood species and to investigate how various fibre fractions and fibre dimensional distributions affect the hygricmechanical properties and thermal conductivity. Thermo-mechanical pulping (TMP) fibres from five wood species were separated into three fractions (unscreened, course, fine) using a tumbler screening machine. Rigid insulation panels with a target density of 110 kg m-3 were produced using 5 wt% polymeric diphenylmethane diisocyanate (pMDI) adhesive. Panels made from softwood fibres with a lower bulk density showed a different type of density profile compared to those made from hardwood fibres. The pattern of mean fibre length distribution density (q1) was similar for pine and larch as well as for beech and oak and was reflected in similar compression strength of the WFIP from the corresponding fractions. Water absorption was dependent on the wood species, irrespective of the fibre fraction. The hardwood panels (beech, oak) had a higher thermal conductivity (TC) than the softwood panels (spruce, pine, larch). The coarse fibre panels tended to have a higher TC than the fine fibre panels. Overall, the wood species and screening variants could be used to produce WFIP for indoor use.

@article{stolze_determination_2023,
	title = {Determination of the {Bonding} {Strength} of {Finger} {Joints} {Using} a {New} {Test} {Specimen} {Geometry}},
	volume = {11},
	copyright = {http://creativecommons.org/licenses/by/3.0/},
	issn = {2227-9717},
	url = {https://www.mdpi.com/2227-9717/11/2/445},
	doi = {10.3390/pr11020445},
	abstract = {In this study, a specimen geometry for testing finger joints was developed using finite element simulation and proofed by experimental testing. Six different wood species and three adhesives were used for finger-jointing specimens. With the test specimen geometry, the bonding strength of the finger joints was determined without the usual self-locking of the joint. Under load, the test specimen geometry introduces maximum stress at the beginning of the bond line (adhesive zone). However, the test specimen geometry does not generate a symmetric stress state. The main difficulty here is the flank angle of the finger joint geometry. The wood species and adhesives significantly influenced the performance of the finger joints.},
	language = {en},
	number = {2},
	urldate = {2024-01-11},
	journal = {Processes},
	author = {Stolze, Hannes and Gurnik, Michael and Kegel, Sebastian and Bollmus, Susanne and Militz, Holger},
	month = feb,
	year = {2023},
	note = {Number: 2
Publisher: Multidisciplinary Digital Publishing Institute},
	keywords = {hardwoods, softwoods, bonding strength, adhesive joint design, finger joints, finite element simulation},
	pages = {445},
	file = {Full Text PDF:/home/maicher/Zotero/storage/Q42YXSYZ/Stolze et al. - 2023 - Determination of the Bonding Strength of Finger Jo.pdf:application/pdf},
}

In this study, a specimen geometry for testing finger joints was developed using finite element simulation and proofed by experimental testing. Six different wood species and three adhesives were used for finger-jointing specimens. With the test specimen geometry, the bonding strength of the finger joints was determined without the usual self-locking of the joint. Under load, the test specimen geometry introduces maximum stress at the beginning of the bond line (adhesive zone). However, the test specimen geometry does not generate a symmetric stress state. The main difficulty here is the flank angle of the finger joint geometry. The wood species and adhesives significantly influenced the performance of the finger joints.

@article{stolze_determination_2023-1,
	title = {Determination of the {Bonding} {Strength} of {Finger} {Joints} {Using} a {New} {Test} {Specimen} {Geometry}},
	volume = {11},
	issn = {2227-9717},
	url = {https://www.mdpi.com/2227-9717/11/2/445},
	doi = {10.3390/pr11020445},
	abstract = {In this study, a specimen geometry for testing finger joints was developed using finite element simulation and proofed by experimental testing. Six different wood species and three adhesives were used for finger-jointing specimens. With the test specimen geometry, the bonding strength of the finger joints was determined without the usual self-locking of the joint. Under load, the test specimen geometry introduces maximum stress at the beginning of the bond line (adhesive zone). However, the test specimen geometry does not generate a symmetric stress state. The main difficulty here is the flank angle of the finger joint geometry. The wood species and adhesives significantly influenced the performance of the finger joints.},
	language = {en},
	number = {2},
	urldate = {2023-02-03},
	journal = {Processes},
	author = {Stolze, Hannes and Gurnik, Michael and Kegel, Sebastian and Bollmus, Susanne and Militz, Holger},
	month = feb,
	year = {2023},
	pages = {445},
	file = {Stolze et al. - 2023 - Determination of the Bonding Strength of Finger Jo.pdf:/home/maicher/Zotero/storage/HISDKZQN/Stolze et al. - 2023 - Determination of the Bonding Strength of Finger Jo.pdf:application/pdf},
}

In this study, a specimen geometry for testing finger joints was developed using finite element simulation and proofed by experimental testing. Six different wood species and three adhesives were used for finger-jointing specimens. With the test specimen geometry, the bonding strength of the finger joints was determined without the usual self-locking of the joint. Under load, the test specimen geometry introduces maximum stress at the beginning of the bond line (adhesive zone). However, the test specimen geometry does not generate a symmetric stress state. The main difficulty here is the flank angle of the finger joint geometry. The wood species and adhesives significantly influenced the performance of the finger joints.

@article{stolze_non-destructive_2022,
	title = {Non-{Destructive} {Evaluation} of the {Cutting} {Surface} of {Hardwood} {Finger} {Joints}},
	volume = {22},
	copyright = {http://creativecommons.org/licenses/by/3.0/},
	issn = {1424-8220},
	url = {https://www.mdpi.com/1424-8220/22/10/3855},
	doi = {10.3390/s22103855},
	abstract = {In this study, the surface parameters wettability, roughness, and adhesive penetration, which are important for wood bonding, were investigated and evaluated utilizing non-destructive methods after different mechanical processing. For this purpose, beech and birch finger joints were prepared with different cutting combinations (three cutters with different sharpness levels and two feed rates) in an industrial process. Effects and interactions on the surface parameters resulting from the different cutting combinations were evaluated using three Full Factorial Designs. The various cutting parameters had a predominantly significant influence on the surface parameters. The effects and identified interactions highlight the complexity of the cutting surface and the importance of wood bonding. In this respect, a new finding is that with sharper cutters, higher contact angles of the adhesives occur. The methods (contact angle measurement, laser scanning microscopy, and brightfield microscopy) used were well suited to make effects visible and quantifiable, which can be of interest for the quality control of the wood processing industry. The results can help to better understand and evaluate the design of wood surfaces via machining and the bonding of hardwoods. Possibly the results can contribute to further standardizing the production of load-bearing hardwood finger joints and making them more efficient.},
	language = {en},
	number = {10},
	urldate = {2022-05-19},
	journal = {Sensors},
	author = {Stolze, Hannes and Gurnik, Michael and Koddenberg, Tim and Kröger, Jonas and Köhler, Robert and Viöl, Wolfgang and Militz, Holger},
	month = jan,
	year = {2022},
	note = {Number: 10
Publisher: Multidisciplinary Digital Publishing Institute},
	keywords = {hardwood, wettability, roughness, non-destructive evaluation, adhesive penetration, cutting surface, finger-jointing, wood characterization},
	pages = {3855},
	file = {Full Text PDF:/home/maicher/Zotero/storage/H4WWF56G/Stolze et al. - 2022 - Non-Destructive Evaluation of the Cutting Surface .pdf:application/pdf;sensors-22-03855.pdf:/home/maicher/Zotero/storage/J6S2BUM3/sensors-22-03855.pdf:application/pdf},
}

In this study, the surface parameters wettability, roughness, and adhesive penetration, which are important for wood bonding, were investigated and evaluated utilizing non-destructive methods after different mechanical processing. For this purpose, beech and birch finger joints were prepared with different cutting combinations (three cutters with different sharpness levels and two feed rates) in an industrial process. Effects and interactions on the surface parameters resulting from the different cutting combinations were evaluated using three Full Factorial Designs. The various cutting parameters had a predominantly significant influence on the surface parameters. The effects and identified interactions highlight the complexity of the cutting surface and the importance of wood bonding. In this respect, a new finding is that with sharper cutters, higher contact angles of the adhesives occur. The methods (contact angle measurement, laser scanning microscopy, and brightfield microscopy) used were well suited to make effects visible and quantifiable, which can be of interest for the quality control of the wood processing industry. The results can help to better understand and evaluate the design of wood surfaces via machining and the bonding of hardwoods. Possibly the results can contribute to further standardizing the production of load-bearing hardwood finger joints and making them more efficient.