Non-isocyanate polyurethane adhesive from sucrose used for particleboard
Sucrose-based non-isocyanate polyurethanes (S-NIPU) were synthesized by the already codified reaction of sucrose, dimethyl carbonate and hexamethylene diamine and used for the first time as adhesives for bonding particleboard. To decrease the NIPU adhesive curing temperature, a silane coupling agent was used as a crosslinking promoter. The performance of particleboards prepared at a press temperature of 230 °C, 200 °C and 180 °C and a press time of 8 min, 10 min and 12 min was tested and evaluated. The structure of the oligomers obtained was detected by matrix-assisted laser desorption ionization time-of-flight mass spectrometry. Thermomechanical analysis and differential scanning calorimetry were also used to analyze their behavior. The particleboards bonded with the S-NIPU adhesive at 230 °C showed excellent properties, which, however, decreased as the press time was reduced. The silane coupling agent used as a crosslinking promoter significantly reduced the curing temperature of the adhesive and allowed to obtain good bonding at a lower press temperature. The results obtained confirmed that coupling the S-NIPU adhesive with a silane used as a crosslinking promoter can yield sufficiently improved results to function as a suitable adhesive for particleboard, medium density fiberboard and other types of particulate wood panels. It was also the first time that a NIPU adhesive was used for wood bonding.
This work was supported by National Natural Science Foundation of China (31660176, 31800481 and 31870546). The first author thanks the China Scholarship Council for the study bursary granted to him. The LERMAB of the University of Lorraine is supported by a grant overseen by the French National Research Agency (ANR) as part of the Laboratory of Excellence (Labex) ARBRE.
- Birukov O, Potashnikova R, Leykin A, Figovsky O, Shapovalov L (2009) Advantages in chemistry and technology of non-isocyanate polyurethane. J Sci Israel-Technol Adv 11:160–167Google Scholar
- China National Standard GB/T 17657 (1999) Test Methods for Evaluating the Properties of Wood-Based Panels and Surface Decorated Wood-Based Panels. The Standardization Administration of the People’s Republic of China, BeijingGoogle Scholar
- China National Standard GB/T 4897.5-2003 (2003) Requirements for load-bearing boards for use in humid conditions. The Standardization Administration of the People’s Republic of China, BeijingGoogle Scholar
- EN312 2003 (2003) Particleboards -specifications European Committee for StandardisationGoogle Scholar
- Pizzi A, Mittal KL (eds) (2011) Wood adhesives. CRC Press, Boca RatonGoogle Scholar
- Poussard L, Mariage J, Grignard B, Detrembleur C, Jérôme C, Calberg C, Heinrichs B, De Winter J, Gerbaux P, Raquez MJ, Bonnaud L, Dubois P (2016) Non-isocyanate polyurethanes from carbonated soybean oil using monomeric or oligomeric diamines to achieve thermosets or thermoplastics. Macromolecules 49(6):2162–2171CrossRefGoogle Scholar
- Tomita H, Sanda F, Endo T (2001b) Model reaction for the synthesis of polyhydroxyurethanes from cyclic carbonates with amines: substituent effect on the reactivity and selectivity of ring-opening direction in the reaction of five-membered cyclic carbonates with amine. J Polym Sci Part A Polym Chem 39:3678–3685CrossRefGoogle Scholar
- Xi X, Pizzi A, Gerardin C, Du G (2018b) Glucose-biobased Non-Isocyanate Polyurethane Rigid Foams. J Renew Mater 1–11Google Scholar