USE OF HYDROXYMETHYLATED LIGNIN IN PHENOL-FORMALDEHYDE RESINS
Phenol–formaldehyde (PF) resins are thermosetting polymers, which are widely used in many fields. One of their applications is as adhesives for manufacture of wood-based composites such as plywood, particleboard and fiberboard. In this research work, modified phenol-formaldehyde resins were synthesized using the alkaline straw lignin as a substitute of petroleum-based phenol at varying ratios from 20 to 50％ (wt), the sodium hydroxide to phenol-modified alkaline lignin molar ratio from 1 to 1.4, and formaldehyde to phenol-modified alkaline lignin molar ratio from 1.8 to 2.6. The parameters used in the characterization of the modified resins were free formaldehyde, gel time, viscosity, pH, solid content. The chemical structures were determined by FTIR spectroscopy. The obtained results were discussed and the optimum operating conditions were selected according to their requirements for utilization in plywood manufacture.
adhesives hydroxymethylation lignin phenol formaldehyde resins plywood
El Mansouri Nour-Eddine Yuan Qiaolong Huang Farong
School of Materials Science and Engineering, East China University of Science & Technology, 130 Meilong Road, Shanghai, 200237,China
国际会议
广州
英文
53-56
2010-11-08（万方平台首次上网日期，不代表论文的发表时间）