Constructing hydrophobic interfaces in aluminophosphate adhesives with reduced graphene oxide to improve the performance of wood-based boards

Abstract

Due to the hydrophilic nature of the aluminophosphate (AP) adhesives, their application in the wood-based board (WBB) industries is rarely considered. Herein, the AP adhesives with reduced graphene oxide (AP@rGO) were developed for the construction of hydrophobic surface, mainly for the improvement of the water resistance of AP-based WBB interface as well as their mechanical properties and fire resistance. Results indicated that there is an excellent interfacial adhesion between the AP@rGO and fibers, making the APW@rGO achieved a high dry bonding strength of 2.77 MPa. Utilizing the advantages of rGO network with outstanding water resistance, the WBB engineered the comparable wet bonding strength as high as 1.65 MPa, meeting the minimum requirement of the plywood standard stated in GB/T9846.3–2004. Also, AP@rGO exhibited an excellent fire resistance properties and smoke suppression ability. Benefiting from these remarkable results, the AP@rGO could be broadly developed for practical applications in related wood-based products.