Effects of the drying process on the shear strength and morphology of the bonding interface of laminated wood

To create a green, safe, and aldehyde-free indoor heating environment, an eco-friendly emulsion polymer-isocyanate (EPI) adhesive was applied to the preparation of electrothermal plywood with built-in carbon fiber paper. The optimized process parameters of electrothermal plywood were 0.9 MPa, 120 C, 6 min, and 200 g/m 2 for hot-pressing pressure, temperature, time, and glue spread amount, respectively. After water immersion for 24 h, the bonding strength of wet-treated electrothermal plywood decreased to 0.89 MPa. The pull-out cracks of the carbon fiber paper were the main fracture form of the wet-treated electrothermal plywood, and the wood failure percentage was 0%-10% under the tensile load. Hydrolysis of the adhesive layer of the wettreated electrothermal plywood occurred. The relative C and N contents in the wet-treated electrothermal plywood decreased by 6.1% and 25.3%, respectively.Moreover, the resistance of the wet-treated electrothermal plywood increased by 273.4% because the internal conductive path was interrupted during the intrusion of the water molecules. The highest electric-to-radiant transfer efficiency of the electrothermal plywood was 72.4%, with a power density of 200 W/m 2 . In conclusion, wet treatment has a significant effect on the bonding strength and electrothermal performance of the electrothermal plywood bonded with EPI adhesive.

show abstract

“…This is a novel attempt to characterize the fracture surface of wood according to the EDF 3D images. [ 40 ]…”

Section: Resultsmentioning

confidence: 99%

Effects of wet treatment on bonding strength and electrothermal performance of electrothermal plywood bonded with emulsion polymer‐isocyanate adhesive

et al. 2022

View full text Add to dashboard Cite

show abstract

High-voltage electric field-induced decreased absorption efficiency of phenol formaldehyde adhesive in different sections of Chinese fir wood

Hou

Wang

et al. 2022

Eur. J. Wood Prod.

View full text Add to dashboard Cite

Curing characteristics of low molecular weight melamine-urea–formaldehyde (MUF) resin-impregnated poplar wood

Zhang

Song

et al. 2022

Construction and Building Materials

View full text Add to dashboard Cite

Effects of the drying process on the shear strength and morphology of the bonding interface of laminated wood

Cited by 3 publications

References 23 publications

Effects of wet treatment on bonding strength and electrothermal performance of electrothermal plywood bonded with emulsion polymer‐isocyanate adhesive

Effects of wet treatment on bonding strength and electrothermal performance of electrothermal plywood bonded with emulsion polymer‐isocyanate adhesive

High-voltage electric field-induced decreased absorption efficiency of phenol formaldehyde adhesive in different sections of Chinese fir wood

Curing characteristics of low molecular weight melamine-urea–formaldehyde (MUF) resin-impregnated poplar wood

Contact Info

Product

Resources

About