Document Type

Article

Publication Date

4-17-2024

Abstract

Condensed tannin-polyethyleneimine (CT-PEI) adhesives offer a strong bonding performance, which has been demonstrated earlier in research industries. The production of unsafe monomers and the substantial costs of the main synthesis of PEI are just two hindrances, which have prevented its hiring process in the wood industries. To manufacture polyamine-tannin adhesives, this study provides another application to PEI: Melamine-based highly branched polyamine (MBHBP), and this can be produced in simple way, affordable, and sustainable conscious ways. The shear strength of three-ply plywood, as revealed by plywood bonding tests, exceeded the performance of most previously reported tannin-based adhesives, left at 1.76MPa even after immersion in boiling water for three hours. The strength remained at 1.20 MPa even after soaking for 72 hours, revealing the CT-MBHBP adhesives’ good water resistance. Through this study, the application of model reactions in combination with ESI-MS (Electrospray Ionization - Mass Spectrometry) assessments of the reaction products, this research also gives the first confirmation of the proposed mechanism methods for polyamine catechol crosslinking reactions. MHBHP- Melamine Based High Branched, has successfully synthesized to replace PEI-Polyethyleneimine. The study provides our understanding of Phenol-amine chemistry by establishing the roles that Michael Addition and Schiff Base played in the establishment of crosslinking networks.

Download

Share

COinS