Abstract:
Tannins are compounds found in many plant species and rich in aromatic and hydroxyl
groups. Previous research has shown that sucrose, citric acid, and tannin are used as raw
materials for the synthesis of eco-friendly adhesives for particleboard since these compounds
showed a great synergy effect when used as a wood adhesive. In this research, the synthesis
of Sucrose/Citric/Tannin adhesives was studied using tannin extracted from Indian almond
leaves expected to increase the adhesion efficiency. The studied ratios of sucrose/citric/tannin
from Indian almond leaves are 75/25/0, 75/25/25, 75/25/50, 75/25/75, and 75/25/100 while
the solid content of Sucrose and Citric in the adhesive is fixed at 40 wt%. The particleboards
are formed at a hot-pressing temperature of 160 °C, 180 °C, 200°C, and 220 °C. Pressure 4 MPa
for 2 minutes, 2 MPa for 2 minutes, and 1 MPa for 2 minutes. It was found that the optimized
proportion of Sucrose/Citric/Tannin extracted from Indian almond leaves was 75/25/25, hot-
pressing temperature is 200 °C. since the highest mechanical properties, with an MOR 26.46
MPa and MOE 7.53 GPa, which passed the TIS. 876-2004 standard. Then the eco-friendly
adhesive from Citric, Sucrose, and Tannin extracted from Indian almond leaves can enhance
the mechanical properties of the particleboard and increase environmental friendliness.
