Ionic liquids as formaldehyde-free wood adhesives

Journal of Wood Science

Official Journal of the Japan Wood Research Society

Table 2 Bonding force (N/g) calculated for the ionic liquids according to the results obtained from the Py2, IM2, and EtPy8 solutions

Adhesive solution^a	Based ionic liquid	Bonding force per ionic liquid^b (N/g)	Bond strength (MPa, MN/m²)	Spread rate of ionic liquid (g/m²)
Py2	[Py][Cl]	5.7 × 10³	0.52	92
IM2	[IM][Cl]	7.2 × 10³	0.60	83
EtPy8	[EtPy][Cl]	5.0 × 10³	0.50	100

^aSee Table 1 for detailed composition of the adhesive solutions
^bBond force was calculated by dividing the bond strength (MPa or MN/m²) with the spread ratio (g/m², see Table 1 for its definition) and accordingly has the dimension of N/g