Preparation and Modification of Sucrose-Based Non-Isocyanate Polyurethane Adhesives for Plywood Bonding

Molecules, Journal Year: 2025, Volume and Issue: 30(7), P. 1541 - 1541

Published: March 30, 2025

The production of non-isocyanate polyurethane (NIPU) resins using recyclable biomass materials and no isocyanates as a substitute for traditional (PU) has become research focus in the industry. development such NIPU application wood adhesives also emerged an interesting new topic. In this study, sucrose was used to react with dimethyl carbonate, then polymerized amine prepare sucrose-based (SNIPU) evaluate their suitability use plywood. Four amines, namely polyethylene (PEI) molecular weight (MW) 10,000, PEI MW 1800, diethylenetriamine, hexanediamine were tested preparation SNIPU determine more suitable showing optimal adhesion performance. effect amount added on adhesive properties further investigated. results showed that prepared PEI-10000 presents good bonding content 45% (w/w sucrose) presented highest strength. dry strength, 24 h cold water (23 °C) wet 3 hot (63 °C 93 strengths its bonded plywood 1.26 MPa, 0.90 0.84 0.80 respectively. Furthermore, addition 13% adhesive) ethylene glycol diglycidyl ether (EGDE) modifier significant decrease 20 curing temperature adhesive.

Language: Английский

Architectural potential of wheat straw processed by thermo-compression: From the perspective of hygrothermal behavior

Construction and Building Materials, Journal Year: 2025, Volume and Issue: 474, P. 141130 - 141130

Published: April 9, 2025

Language: Английский