Gluing and surface treatment priming properties of laser cut wood

Fatemeh Rezaei

Doctoral thesis

Abstract:

This study aims to identify the tensile shear strength of glued beech (Fagus sylvatica L.) and oak (Quercus robur L.) samples cut by CO2 laser. The main focus is on the characteristics of the bondline made of laser-cut wood. The laser beam was cut the samples in the perpendicular direction to the grain. The surface quality of the laser cut samples was measured by using a contact and contactless (laser) methods. A scanning electron microscope was used to show the anatomical structure, the penetration depth of PVAc resin and O/C ratio of the laser cut surface. Contact angle measurement and chemical analysis were implemented by using Fourier transform infrared spectroscopy and a contact angle goniometer. The tensile shear test on the laser cut samples bonded with polyvinyl acetate were carried out using universal testing machine. We gained knowledge about the glued strength of laser cut wood. The work brings new information about the physical and chemical properties of laser-cut surface prior to gluing. The main characteristics of the bondline made of laser-cut wood were successfully determined.

Keywords

CO2 laser, Glued tensile shear strength, CO2 processing parameters.

Language used: English

Date on which the thesis was submitted / produced: 23. 11. 2022

Thesis defence

• Supervisor: doc. Ing. Milan Gaff, PhD.

Czech University of Life Sciences Prague

Faculty of Forestry and Wood Sciences

Doctoral programme / field:
Forestry Engineering / Wood Processing and Forest Machinery