竹粉填充对脲醛树脂胶黏剂性能的影响

为探索竹粉替代面粉填充脲醛树脂胶黏剂的可行性，减少面粉在非食品工业的消耗，充分利用竹材加工剩余物，以竹粉作为脲醛树脂胶黏剂的填充剂，研究了竹粉的添加量、粒度对脲醛树脂胶黏剂的粘度、胶合性能和甲醛释放量的影响，以及竹粉在胶液中的分散情况，并采用傅里叶变换红外光谱对添加了竹粉的脲醛树脂胶黏剂进行了分析。结果表明：竹粉在脲醛树脂胶液中易分散，且随竹粉粒度的减小，竹粉分散越均匀；竹粉粒度、添加量对脲醛树脂胶黏剂的胶合强度有较显著的影响，但对甲醛释放量的影响不显著；当添加量为脲醛树脂胶黏剂( UF)胶液质量15％的220－240目竹粉时，竹粉填充不影响其胶合强度和甲醛释放量。

Effects of mixing the bamboo powder on properties of urea formaldehyde adhesive

To explore the feasibility replacing flour with bamboo powder as the filling agent of urea formaldehyde adhesive ( UF) , and reduce the consumption of flour in the non-food industries and make full use of the residue from bamboo processing factory, the effect of granularity and addition of the bamboo powder on the performances of UF adhesive was analyzed, which include the viscosity, the bonding performance and the formaldehyde emission. Moreover, after filled some bamboo powder or flour, the distribution of the bamboo powder in UF was observed under stereoscopic microscope, and the chemical performances were tested with Fourier transform infrared spectroscopy( FTIR) . The results were shown as follows. It was easy to mix the bamboo powder into UF adhesive, and its distribution was well. The smaller size of the bamboo powder grain was, the better the distribution was. It was insignificant the effect of the granularity or the addition of bamboo powder on the formaldehyde emission of the plywood, while it had a significant effect on the bonding strength of the plywood. When the addition of bamboo powder was 15% and the granularity was 220-240 meshes, there was insignificant effect on the bonding strength and the formaldehyde emission of the plywood.