新型橡胶铜复合多孔材料的制造方法及其吸声特性

对200目橡胶粉和500目高纯无氧铜在高能行星式球磨机内进行20 min混料，混料后在模具中，在50℃温度下，在20 MPa压力下，压制成Φ 100 mm×5 mm的圆片，再通过选择性腐蚀方法，把其中的铜腐蚀掉，得到多孔橡胶材料.发现，多孔橡胶中存在大量20 μm以下的小孔以及少量尺寸大于100 μm的大孔.吸声系数试验表明，多孔橡胶对于不同频率的声波均有较好的吸收效果.

Preparation of the novel rubber-copper porous composite and its acoustic absorption property

Both rubber powder sizing in 200 mesh and 99.99% copper powder sizing in 500 mesh were mixed in a planetary ball-miller for 20 min. Then the mixture was compacted in a die sizing in Φ100 mm×5 mm at a compressive stress of 20 MPa at 150℃. The compressed sample was taken out after the hot compression. Then it was washed in a 5 wt% nitric acid solution for 30 min， followed by a washing in pure water and drying at 50℃. Thus， porous rubber was obtained. Pores sizing in 20 microns and 100 microns is able to be observed in the porous rubber. Acoustic absorption test shows that a high acoustic absorption coefficient is able to be achieved for both low and high frequency acoustic wave.