Investigating the thermal properties of bio -adhesive tanic acid and gallic acid with furfural

In recent years, due to the lack of fossil resources and environmental concerns, mankind is looking for the development and replacement of renewable resources instead of fossil resources. Since today the consumption of wooden panels is expanding, there is a great demand to replace adhesives based on fossil resources with natural adhesives due to non-renewability, dependence on oil prices and the release of formaldehyde from UF and related resins, which is considered a serious threat to human health. , There is. Based on this, there are many studies aimed at replacing synthetic resins with natural resins. In this research, resin was prepared from tannic acid and gallic acid as environmentally friendly raw materials and furfural, polyethyleneimine, sericin and glutaraldehyde crosslinkers. First, the raw materials were mixed with furfural crosslinker and then other binders were added in different proportions and mixed at 80°C for half an hour. From the synthesis of these materials, 12 different types of resin compounds were prepared, which were subjected to FT-IR spectroscopy and TGA, DSC analyzes in order to identify functional groups and investigate their thermal properties. The results showed that compounds containing polyethyleneimine had good resistance to thermal degradation and furfural also improved the characteristics of adhesives. The combination of raw materials, furfural, polyethylene imine has the highest thermal stability in the DSC test.