Amin Yusup, Nugroho Naresworo, Bahtiar Effendi Tri, Dwianto Wahyu, Lubis Muhammad Adly Rahandi, Adzkia Ulfa, Karlinasari Lina
Research Center for Biomass and Bioproducts, National Research and Innovation Agency, Cibinong 16911, Indonesia.
Department of Forest Products, Faculty of Forestry and Environment, IPB University, Bogor 16680, Indonesia.
Polymers (Basel). 2024 Apr 12;16(8):1084. doi: 10.3390/polym16081084.
The surface roughness and wettability of wood are critical aspects to consider when producing laminated wood products with adhesive applications. This study aims to investigate the surface roughness and dynamic wettability of Jabon wood in the presence of melamine formaldehyde (MF)-based adhesives. Commercial MF adhesives (MF-0) and modified MF adhesives (MF-1) were applied to Jabon wood, which includes tangential (T), radial (R), and semi-radial (T/R) surfaces. The surface roughness of Jabon wood was assessed using a portable stylus-type profilometer. The low-bond axisymmetric drop shape analysis (LB-ADSA) method was employed to identify the contact angle () of the MF-based adhesives on Jabon wood. The wettability was determined by evaluating the constant contact angle change rate ( value) using the Shi and Gardner (S/G) model. Dynamic mechanical analysis (DMA) was employed to investigate the viscoelastic characteristics of the interphase analysis of the wood and MF-based adhesives. The roughness level (Ra) of the Jabon board ranged from 5.62 to 6.94 µm, with the T/R having a higher level of roughness than the R and T. MF-0 exhibited a higher value (0.262-0.331) than MF-1 (0.136-0.212), indicating that MF-0 wets the surface of Jabon wood more easily than MF-1. The wood-MF-0 interphase reached a maximum stiffness of 957 N/m at 123.0 °C, while the wood-MF-1 had a maximum stiffness of 2734 N/m at 110.5 °C. In addition, the wood-MF-0 had a maximum storage modulus of 12,650 MPa at a temperature of 128.9 °C, while the wood-MF-1 had a maximum storage modulus of 22,950 MPa at 113.5 °C.
在生产使用胶粘剂的层压木制品时，木材的表面粗糙度和润湿性是需要考虑的关键因素。本研究旨在调查在三聚氰胺甲醛（MF）基胶粘剂存在的情况下，桃花心木的表面粗糙度和动态润湿性。将商用MF胶粘剂（MF - 0）和改性MF胶粘剂（MF - 1）应用于桃花心木，桃花心木包括弦向（T）、径向（R）和半径向（T/R）表面。使用便携式触针式轮廓仪评估桃花心木的表面粗糙度。采用低 Bond 轴对称滴形分析（LB - ADSA）方法来确定MF基胶粘剂在桃花心木上的接触角（）。通过使用Shi和Gardner（S/G）模型评估恒定接触角变化率（值）来确定润湿性。采用动态力学分析（DMA）来研究木材与MF基胶粘剂界面相分析的粘弹性特性。桃花心木板的粗糙度水平（Ra）在5.62至6.94 µm之间，T/R的粗糙度水平高于R和T。MF - 0的 值（0.262 - 0.331）高于MF - 1（0.136 - 0.212），表明MF - 0比MF - 1更容易润湿桃花心木表面。木材 - MF - 0界面相在123.0°C时达到最大刚度957 N/m，而木材 - MF - 1在110.5°C时具有最大刚度2734 N/m。此外，木材 - MF - 0在128.9°C的温度下具有最大储能模量12,650 MPa，而木材 - MF - 1在113.5°C时具有最大储能模量22,950 MPa。
