Fundamental Adhesion Aspects in Wood Bonding

2011 ◽  
pp. 1-1
Keyword(s):  
Wood Bonding

Preparation and characterization of tannin-based adhesives reinforced with cellulose nanofibrils for wood bonding

Holzforschung ◽  
2020 ◽  
Vol 0 (0) ◽  
Author(s):  
Uasmim Lira Zidanes ◽  
Matheus Cordazzo Dias ◽  
Mário Sérgio Lorenço ◽  
Elesandra da Silva Araujo ◽  
Maryella Júnnia Ferreira e Silva ◽  
...  
Keyword(s):  
Cellulose Nanofibrils ◽  
Glue Line ◽  
Mechanical Resistance ◽  
Thermogravimetric Analyses ◽  
Humidity Resistance ◽  
Wood Bonding ◽  
Toona Ciliata ◽  
Solids Content ◽  
The One

AbstractAdhesives based on vegetable tannins are already a reality in the market. However, their use is still limited due to their low mechanical resistance and weak humidity resistance. Cellulose nanofibrils (CNFs) are being used as reinforcing materials in various composites, resulting in an improvement of mechanical proprieties in general. The objective of this work was to evaluate the incorporation of CNFs in adhesives made of tannins obtained from the Angico tree (Anadenanthera peregrine). Concentrations of nanofibrils at 1, 5, and 10% were added to the adhesives on a dry basis. Tests of viscosity, pH, solids content, and gel time were performed to determine the physical proprieties of the adhesives. The Attenuated Total Reflectance Fourier Transform Infrared Spectroscopy (ATR-FTIR) and Raman spectra measurements were also determined to understand the interaction between tannins and CNFs. Thermogravimetric analyses (TGA) were carried out to determine the thermal resistance of the composite. The FTIR and Raman characterization identified some differences in the peaks in the chemical composition of the adhesives with different percentages of CNFs. The adhesives showed no different decomposition in the thermogravimetric analyses. The shear strength in the glue line of the adhesive with 5% of CNFs in Toona ciliata woods was determined. Among all the adhesives analyzed, the one with 5% of CNFs produced an improvement in the mechanical resistance and humidity resistance on the glue line.

The quality of the wood bonding depending on the method of applying the selected thermoplastic biopolymers

2021 ◽  
Vol 116 ◽  
pp. 78-85
Author(s):  
Aneta Gumowska ◽  
Grzegorz Kowaluk
Keyword(s):  
Shear Strength ◽  
Solid Wood ◽  
Average Value ◽  
Wood Bonding ◽  
Research Show

The quality of the wood bonding depending on the method of applying the selected thermoplastic biopolymers. The aim of the research was to determine the effect of the method of applying the biopolymer on the surface of bonding solid wood elements on the quality of the obtained adhesive connection. The results of conducted mechanical research show that the highest average value of shear strength was observed for birch lamellas bonded with PLA, both with the first and second method of application. In case of estimating the quality of the bonding of wooden elements, better results were achieved for PLA and the second method of application the "green" adhesive.

Improving the understanding of wood bonding: behavior of different adhesives on the surface of eucalyptus and pine wood

2021 ◽  
pp. 102987
Author(s):  
Juliana Jerásio Bianche ◽  
Angélica de Cássia Oliveira Carneiro ◽  
Benedito Rocha Vital ◽  
Bruno Geike de Andrade ◽  
Regina Maria Gomes ◽  
...  
Keyword(s):  
Pine Wood ◽  
Wood Bonding

Wood Bonding by Surface Reaction

1983 ◽  
Vol 15 (2) ◽  
pp. 105-115 ◽  
Author(s):  
William E. Johns ◽  
Ahmad Jahan-latibari
Keyword(s):  
Surface Reaction ◽  
Wood Bonding

Nuvolve Engineered Polysaccharides as Performance-Enhancing Additives for Latex Wood Adhesives

2020 ◽  
Vol 70 (3) ◽  
pp. 293-301
Author(s):  
Joseph J. Marcinko ◽  
Christian Lenges ◽  
Kyle Kim ◽  
Monica Harvey
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Shear Stress ◽  
Acer Saccharum ◽  
Room Temperature ◽  
Mechanical Analysis ◽  
Enzymatic Polymerization ◽  
Resonance Spectroscopy ◽  
Wood Adhesives ◽  
Wood Bonding ◽  
Performance Enhancing

Abstract The work presented here focuses on the, incorporation of an engineered polysaccharide polymer, α-1,3-glucan, derived from the enzymatic polymerization of sucrose, as a performance-enhancing additive for commercial, latex-based wood adhesives used in wood bonding applications. Adhesive performance was measured on hard maple (Acer saccharum) using ASTM Standard Method D-905. Dynamic mechanical analysis and solid-state nuclear magnetic resonance spectroscopy were the characterization techniques used to assess the properties of room-temperature–cured adhesive films. Significant increases in shear stress were observed for these formulated latex adhesives containing the polysaccharide polymer.

Preparation and characterization of wood-to-wood bonding adhesive by glycidyl methacrylate grafting natural rubber

2022 ◽  
pp. 103093
Author(s):  
Siriwat Radabutra ◽  
Pongtanawat Khemthong ◽  
Sayant Saengsuwan ◽  
Chalathorn Chanthadand ◽  
Narumon Ponyut ◽  
...  
Keyword(s):  
Natural Rubber ◽  
Glycidyl Methacrylate ◽  
Wood Bonding

scholarly journals Bonding of plywood 

2016 ◽  
Vol 62 (No. 4) ◽  
pp. 198-204
Author(s):  
M. Brožek
Keyword(s):  
Tensile Strength ◽  
Testing Machine ◽  
Strength Testing ◽  
Bonded Joints ◽  
Rupture Force ◽  
Oblique Direction ◽  
Direction Angle ◽  
Economical Evaluation ◽  
Wood Bonding ◽  
Strength Tests

The contribution contains results of bonded joints strength tests. The tests were carried out according to the modified standard ČSN EN 1465 (66 8510):2009. The spruce three-ply wood of 4 mm thickness was used for bonding according to ČSN EN 636 (49 2419):2013. The test samples of 100 × 25 mm size were cut out from a semi-product of 2,440 × 1,220 mm size in the direction of its longer side (angle 0°), in the oblique direction (angle 45°) and in the direction of its shorter side (crosswise – angle 90°). The bonding was carried out using eight different domestic as well as foreign adhesives according to the technology prescribed by the producer. All used adhesives were designated for wood bonding. At the bonding the consumption of the adhesive was determined. After curing, the bonded assemblies were loaded using a universal tensile-strength testing machine up to the rupture. The rupture force and the rupture type were registered. Finally, the technical-economical evaluation of the experiments was carried out. 

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