木质-碳纤维复合材料的制备工艺

Process Optimization of Wood-carbon Fiber Composites

为探究不同工艺参数对木质-碳纤维复合材料声学振动性能的影响,优化制备工艺条件,从而提高木质-碳纤维复合材料用材的声学振动性能。实验采用冷压法制备木质-碳纤维复合材料,分析施胶量、单位压力和冷压时间对复合材料声学振动性能的影响规律,利用响应面优化法建立工艺因子与响应值间的二次回归方程,优化复合材料的制备工艺参数。结果表明:在单因素试验中,工艺因子对复合材料声学振动性能影响显著,当单位压力0.8~1.1MPa、施胶量180~210g/m^2、冷压时间21~26h时,音板用材声学振动性能显著提升,以比动弹性模量、E/G值、对数衰减率为响应值的响应面回归模型均在0.01水平下显著,优化后工艺参数为:单位压力1MPa、冷压时间22h、施胶量200g/m^2,实际值与预估值间的偏差率均不大于5%。

In order to explore the influence of different process parameter factors on the acoustic vibration performance of wood-carbon fiber composites, the preparation conditions were optimized to improve the acoustic vibration performance of wood-carbon fiber composite materials, and analyze the influence of sizing amount, unit pressure and cold pressing time on the acoustic vibration performance of composites. With the response surface methodology, the quadratic regression equation between process factor and response value was established, and the process parameters of composites preparation were optimized. In the single factor experiment, the process factor has a significant influence on the acoustic vibration performance of the composites. When the unit pressure is 0.8-1.1 MPa, the sizing amount is 180-210g/m^2, and the cold-pressing time is 21-26h. Composites acoustic vibration performance is significantly improved. The response surface methodology models with E/ρ value, E/G value and logarithmic decay rate are all at 0.01 level. The optimized process parameters are: unit pressure of 1 MPa, cold-pressing time of 22 h, sizing amount of 200 g/m^2, and the deviation rate between the actual value and the estimated value is less than 5%.