Project detail

Characterization of properties of modified isocyanate-based adhesives for structural engineered wood products

Duration: 01.01.2021 — 31.12.2023

Funding resources

Czech Science Foundation - Standardní projekty

- whole funder (2021-03-08 - not assigned)

On the project

Characterization of modified isocyanate-based adhesives for engineered wood products

Description in English
In the field of adhesives intended for load-bearing wooden structures, it is currently a priority to use adhesives with the lowest possible impact on the environment, which at the same time do not contain formaldehyde. Existing natural-based adhesives do not show sufficient bonded joint durability, and most synthetic adhesives for boards or beams are formaldehyde-based. The essence of the proposed project is the effort to achieve qualitatively better parameters of isocyanate adhesives and their optimal modification via dispersed particles. The project will monitor the effect of the filler on the properties of the adhesive mixture and on the interphase interface of the bonded wood joint at the sub-microscopic level. Via suitable modification of adhesives, it is possible to achieve not only an improvement in its properties, but also the overall increase of the load-bearing capacity or stiffness of the bonded joint. Modification of isocyanate adhesives will be carried out with regard to the use of adhesives for wood structural panels and finger joints of wooden structural elements.

Keywords
Dřevo;dřevěné kompozitní materiály;dřevěné konstrukce;izokyanát;adheze;průnik lepidla

Key words in English
Wood, wood composites, timber structures, isocyanate, adhesion, resin penetration

Mark

GA21-20645S

Default language

Czech

People responsible

Běťák Adam, Ing. - fellow researcher
Šmak Milan, doc. Ing., Ph.D. - fellow researcher
Vaněrek Jan, doc. Ing., Ph.D. - principal person responsible

Units

Institute of Technology of Building Materials and Components
- co-beneficiary (2021-01-01 - 2023-12-31)

Results

LACIKOVÁ, P.; VANĚREK, J.; BĚŤÁK, A. Behaviour of wood joints glued by one component polyurethane adhesive modified by cotton flakes and basalt fibers. Transactions of the VŠB – Technical University of Ostrava, Civil Engineering Series, 2022, vol. 22, no. 2, p. 69-73. ISSN: 1804-4824.
Detail

LACIKOVÁ, P.; VANĚREK, J.; BĚŤÁK, A.; BÖHM, M. Improving the Tensile Shear Strength of Lap Joints of Beech Wood by Adding Basalt Fibers to Polyurethane Adhesive. In Proceedings of the International Conference on Numerical Analysis and Applied Mathematics 2022. 2024. Melville (NY), Spojené státy: AIP Conference Proceedings, 2024. ISBN: 978-0-7354-4954-1.
Detail

VANĚREK, J.; BÖHM, M.; BĚŤÁK, A.; KULICH, P.; MAŠEK, J. Penetration Process of Polyurethane Adhesive into the Wood Ultrastructure. In AIP Conference Proceedings 2611. vol. 1. Melville (NY), Spojené státy: AIP Publishing LLC, 2022. p. 040008-1 (040008-5 p.)ISBN: 978-0-7354-4247-4.
Detail

BÖHM, M.; VANĚREK, J.; PROCHÁZKA, J.; JERMAN, M.; ČERNÝ, R. Determination of Tensile Shear Strength of Lap Joints of Planed and Sanded Beech Wood. In AIP Conference Proceedings 2611. vol. 1. Melville (NY), Spojené státy: AIP Publishing LLC, 2022. p. 040009-1 (040009-5 p.)ISBN: 978-0-7354-4247-4.
Detail

PROCHÁZKA, J.; PODLENA, M.; TIPPNER, J.; VANĚREK, J.; BÖHM, M. Influence of False Heartwood of European Beech (Fagus sylvatica L.) on Tensile Shear Strength of Lap Joints. BIORESOURCES, 2024, vol. 19, no. 4, p. 8354-8367. ISSN: 1930-2126.
Detail

VANĚREK, J.; BÁLKOVÁ, R.; ŠMAK, M.; BĚŤÁK, A.; VEJPUSTEK, Z. The effect of long and short term elevated temperatures on the behaviour of lap glued joints of load-bearing spruce elements. International Journal of Adhesion and Adhesives, 2024, vol. 129, no. February 2024, ISSN: 0143-7496.
Detail

LACIKOVÁ, P.; BĚŤÁK, A. Characterization of sealants and adhesives behaviour as fulfillments of cracks in wood. In Juniorstav 2024: Proceedings 26th International Scientific Conference Of Civil Engineering. Brno: ECON Publishing, s.r.o., 2024. ISBN: 978-80-86433-83-7.
Detail

BOHM, M.; MORAVČÍK, I.; LACIKOVÁ, P.; VANĚREK, J.; TESAŘOVÁ, H.; ČERNÝ, R. Tensile shear strength and microscopic characterization of structural polyurethane adhesive modified with basalt fibers. In International Conference of Numerical Analysis and Applied Mathematics. 3094. Melville (NY), USA: AIP Conference Proceedings, 2024. ISBN: 978-0-7354-4954-1.
Detail

BĚŤÁK, A.; ZACH, J.; MISÁK, P.; VANĚREK, J. Comparison of Wood Moisture Meters Operating on Different Principles of Measurement. Buildings, 2023, vol. 13, no. 2, p. 1-14. ISSN: 2075-5309.
Detail

Responsibility: Vaněrek Jan, doc. Ing., Ph.D.