Progress on Urea Formaldehyde Resin Adhesives Modified by Nanomaterials
Urea formaldehyde(UF)resin is widely used as an adhesive in the production of artificial boards because of the advantages of low cost and easy preparation.However,the UF resin adhesive can undergo chemical bond breakage and release formaldehyde under the attack of water molecules,which reduces the performance of UF resin.By adding nanomaterials to the UF resin adhesive,the nanoparticles can physically or chemically interact with the UF resin,thereby modifying and improving the resin.This article summarizes the methods for modifying UF resin adhesives by nanomaterials.The nanomaterials applied in recent years are classified into elemental,metal oxide,non-metal oxide,inorganic salt,and organic macromolecule nanomaterials.The reaction mechanism,production process,and modification effects are summarized.Nanomaterials modify UF resin through mechanisms such as photocatalytic oxidation,intermolecular forces,and hydrogen bonding.For different nanomaterials,selecting the suitable reaction raw material ratios,the time and amounts of nanomaterials additive and the temperature of chemical reaction can optimize production processes,reduce formaldehyde emissions,and enhance resin bonding properties.After being modified,nanomaterials can be better applied to modify UF resin.They are expected to increase new reaction sites and improve the compatibility between nanomaterials and UF resin,which has certain research and application prospects.
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