Synthesis of Humin-Phenol-Formaldehyde Adhesive
نویسندگان
چکیده
Humins are low-value-added byproducts from the biomass acid hydrolysis process. In the present work, humins were first employed as a phenol replacement for synthesis of modified phenol-formaldehyde adhesives through a two-step process. In this process, humins were first utilized to obtain alkaline soluble products, mainly consisting of phenolics, through a hydrothermal process. The obtained alkaline soluble products then reacted with phenol and formaldehyde to produce humin-phenol-formaldehyde adhesive (HPFA). The physicochemical properties of HPFA, including viscosity, bonding strength, pH, free formaldehyde level, free phenol level and solid content, met the requirements of the GB/T 14732-2006 Chinese National Standard.
منابع مشابه
Development and characterization of groundnut shell lignin modified phenol formaldehyde wood adhesive
Lignin modified phenol formaldehyde wood adhesives have been prepared by replacing phenol with the groundnut shell lignin (GNSL) at varying weight percentages. The optimization of weight percent incorporation of GNSL was carried out in respect to mechanical properties. It was found that a maximum of up to 50 wt.% of phenol in the phenol formaldehyde (PF) adhesive can be substituted by GNSL to o...
متن کاملSoy-Based Adhesive Cross-Linked by Phenol-Formaldehyde-Glutaraldehyde
To prepare a low-formaldehyde soy-based adhesive with good water resistance, phenol-formaldehyde modified with glutaraldehyde (PFG) with lower free phenol and free formaldehyde contents was used to cross-link the soy-based adhesive. The results showed that the mechanical properties and water resistance of plywood prepared with soy-based adhesive with PFG was better than that of plywood with the...
متن کاملPreparation and Characterization of a Phenol-formaldehyde Resin Adhesive Obtained From Bio-ethanol Production Residue
Phenol formaldehyde (PF) resins are widely used as wood adhesives in the industrial production of exterior-grade plywood panels, oriented strand board panels and particleboards due to their superior performance including high bonding strength, heat resistance, excellent water resistance and chemical stability1. However, phenol, one raw material for the synthesis of PF resins, is a petroleum-bas...
متن کاملSynthesis and Structure Characterization of Phenol-Urea-Formaldehyde Resins in the Presence of Magnesium Oxide as Catalyst
The objective of this research was to provide a useful approach of polymer synthesis for accelerating the fast cure of phenol-urea-formaldehyde (PUF) resin as wood adhesive by optimizing its structure and composition. The PUF resins containing high contents of very reactive groups such as para-methylol groups were synthesized by reacting methylolurea, phenol, and formaldehyde in the presence of...
متن کاملWood Adhesion and Adhesives
9.1 General..................................................................................................................................216 9.2 Wood Adhesive Uses............................................................................................................217 9.3 Terminology..........................................................................................................
متن کامل