Urea–formaldehyde (UF) resin is the main commercial adhesive used for medium-density fiberboard (MDF) manufacturing. UF resin is used to produce MDF of high quality. However, this production process of MDF releases formaldehyde in the environment. In this scenario, a mix of crude glycerol, citric acid, and tannin was used as a binder to replace UF resin in MDF manufacturing. A bio-based adhesive content of 14%, and two pressing times (420 s and 630 s) for MDF manufacturing in the laboratory were used. The effect of bio-based adhesive and pressing time on the physical and mechanical properties of MDF were investigated. According to results obtained, modulus of elasticity (2382 MPa and 2439 MPa), modulus of rupture (14.38 MPa and 14.43 MPa), and internal bonding strength (0.79 MPa and 0.90 MPa) of MDF panels are meeting requirements of the A208.2-2016 standard of the American National Standard Institute. Thermogravimetric analysis indicated that polymer cured at 630 s showed a higher thermal stability in comparison to polymer cured at 420 s. The Fourier transform infrared spectroscopy analysis shows the spectra of polymer with the peak at 1714 cm⁻¹ and 1716 cm⁻¹. The results showed the potential of the mix of crude glycerol and citric acid to replace UF resin in MDF manufacturing.

脲醛（UF）树脂是用于中密度纤维板（MDF）制造的主要商业粘合剂。UF树脂用于生产高质量的MDF。但是，这种中密度纤维板的生产过程会在环境中释放甲醛。在这种情况下，将粗制甘油，柠檬酸和单宁的混合物用作粘合剂，以替代MDF制造中的UF树脂。使用了14％的生物基粘合剂含量，并在实验室中使用了两次压制时间（420 s和630 s）进行MDF生产。研究了生物基胶粘剂和压制时间对中密度纤维板物理机械性能的影响。根据获得的结果，MDF面板的弹性模量（2382 MPa和2439 MPa），断裂模量（14.38 MPa和14.43 MPa）以及内部粘合强度（0.79 MPa和0.90 MPa）均符合A208的要求。美国国家标准协会的2-2016标准。热重分析表明，与在420 s固化的聚合物相比，在630 s固化的聚合物显示出更高的热稳定性。傅里叶变换红外光谱分析显示出聚合物的光谱，其峰位于1714 cm^-1和1716 cm ^-1。结果表明，粗甘油和柠檬酸的混合物在中密度纤维板制造中具有替代超滤树脂的潜力。