Document Type
Article
Publication Date
4-17-2024
Abstract
The development of low-cost bio-based formaldehyde-free adhesives has aroused widespread interest in the wood adhesive industry. The usage of adhesives that contain urea-formaldehyde or phenol formaldehyde leads to environmental issues. Therefore, bio-based renewable resources are a better option to use as bio-based polyols instead of petroleum-based polyols. Among all renewable resources, plant oils are the most popular biobased resource for replacing such conventional polyols. Here, in this research work, soybean oil polyol (SOP) was used to synthesize polyurethane (PU) adhesive. For studying adhesion strength, three different aliphatic diols (EDO, BDO, and HDO) with increasing chain length were used as crosslinking reagents. For studying mechanical strength, different wt.% of diols were used to synthesize PU adhesives. The dry lap shear strength of these PU adhesives was observed on two different coupons (oak wood and stainless steel). Interestingly, on oak wood, the mechanical strength was increased from 3 MPa to 6.36 MPa after incorporating BDO which is the highest tensile strength among all the other adhesive samples. Thermal properties were studied by TGA and DSC. A solubility test was also done to check the solvent's effect on these PU adhesives and no major changes were observed in water thus indicating the hydrophobic nature of adhesive samples. After being immersed in different solvents for 24 hours, there were no notable modifications observed in the FT-IR spectra of these PU materials. This work provides a sustainable alternative to petroleum-based adhesives with good mechanical and physical properties.
Recommended Citation
Parekh, Sonu; Chaudhary, Mayankkumar L.; Patel, Rutu; and Patel, Pratik, "Soybean Oil-based Adhesives: Effect of Aliphatic Diols on the Properties of Adhesives" (2024). Posters. 65.
https://digitalcommons.pittstate.edu/posters_2024/65
