木焦油改性生物油-酚醛树脂胶粘剂的工艺条件研究

Study on process conditions of bio-oil-phenolic resin adhesives modified by wood tar

以木焦油作为BOPF(生物油-酚醛树脂)的改性剂,制备BTPF(木焦油改性生物油-酚醛树脂)胶粘剂,并用于胶合板的制备。以木焦油加入量、催化剂(NaOH)含量和反应时间作为试验因素,以胶接强度、黏度和凝胶时间作为评价指标,采用正交试验法优选出制备BTPF胶粘剂的最佳工艺条件。结果表明:当w(木焦油)=15%、w(NaOH)=4%和反应时间为40 min时,BTPF胶粘剂的综合性能相对最好,并且完全满足GB/T 14732-2006标准中的指标要求,相应胶合板的胶接强度(1.54 MPa)和甲醛释放量(0.25 mg/L)达到了GB/T 18580—2001标准中的Eo级指标要求。

With wood tar as modifier of B OPF （bio-oil-phenolic resin）,a BTPF （BOPF modified by wood tar） adhesive, which was used for preparing plywood, was made. With wood tar content, catalyst （NaOH） content and reaction time as experimental factors,the bonding strength,viscosity and gelation time as evaluation indices,the optimal process conditions of preparing BTPF adhesive were preferred by orthogonal experiment. The results showed that the BTPF adhesive had reversely best combination property,it could fully meet index requirements in GB/T 14732--2006 standard,and the bonding strength（1.54 MPa） and formaldehyde emission（0.25 mg/L） for corresponding plywood could reach E0 level index requirements in GB/T 18580--2001 standard when mass fractions of wood tar and NaOH were 15% and 4% respectively,and reaction time was 40 min.