Synthesis and characterization of alkoxy silane modified polyurethane wood adhesive based on epoxidized soybean oil polyester polyol

• Published in: Composites. Part B, Engineering Engineering, 2020-04, Vol.187, p.107857, Article 107857
• Main Authors: Dodangeh, F., Seyed Dorraji, M.S., Rasoulifard, M.H., Ashjari, H.R.
• Format: Article
• Language: English
• Subjects: Adhesion; Mechanical properties; Polymer-matrix composites (PMCs); Thermal properties
• ISSN: 1359-8368; 1879-1069
• DOI: 10.1016/j.compositesb.2020.107857

The alkoxysilane/isocyanate-terminated polyurethane (SPU) was prepared as bio-adhesive. For this purpose, a bio-polyol was synthesized and modified by epoxidized soybean oil (ESBO) and tetra ethyl ortho silicate (TEOS), respectively. In the following this modified bio-polyol was reacted with polymeric 4, 4′-diphenylmethane diisocyanate (pMDI) to form the bio-adhesive. The performance of the bio-adhesive was improved by using zinc oxide nanoparticles (ZnO NPs), triethylene glycol (TEG) and dibutyltin dilaurate (DBTDL) as additives. The effect of mentioned additives on the bio-adhesive strength was investigated and optimized using Taguchi method. The lap shear strength in optimal condition was obtained 6.478 MPa. This tensile strength value was in good agreement with predicted value (7.173 MPa) by Taguchi method. •Preparation of polyol based on renewable source.•Modification of polyol molecular structure using TEOS, TEG and ZnO NPS and DBTDL catalyst.•Preparation of bio-based silane modified polyurethane adhesive with high adhesion strength.•Application of the Taguchi method for optimization of the required modifier values.•Investigation of thermal stability of silane modified polyurethane.