Abstract:

The non-metallic powder recycled from waste paper-based printed circuit boards (PCBs) was analyzed with scanning electron microscopy (SEC), X-ray fluorescence (XRF), Fourier transform infrared spectrum (FTIR), and the mechanical properties, heat resistance of the non-metallic powder filled polypropylene (PP) composites were tested. The properties of non-metallic powder recycled from waste paper-based PCBs and its effect on the performance of the composites were studied. The results showed that the waste paper-based PCBs was resin polymer with a little fiberglass, and its polarity was due to the presence of hydroxide groups, carbonyl groups, acetal groups and silanol groups on the particle surface. Modified non-metallic powder and PP powder in the composite exhibited excellent compatibility, and modified non-metallic powder enhanced the bending strength, Vicat softening temperature (VST) and flame retardance capability of the composite. The bending strength of the composite increased with increasing filler proportion of the nonmetal powder, bending strength increased by 9.1 MPa and VST rose by 2℃ when the 0.08 cm（180 mesh） non-metallic powder filler proportion reached 30%. The non-metallic powder could be used as filler in the PP composite to improve the properties of the composite.

Key words:

电子废弃物, 废印刷电路板, 非金属粉, 聚丙烯, 复合材料

摘要：

利用电镜扫描、X射线荧光光谱和红外光谱分析废纸基PCBs非金属粉以及对复合材料力学性能和热性能测试，研究了废纸基PCBs非金属粉性质及对复合材料性能的影响，结果表明：废纸基PCBs中含少量玻璃纤维，绝大多数是树脂聚合物，颗粒表面存在羟基、羰基、缩醛基、硅醇基等官能团，是极性材料；非金属粉经改性后与基体PP混合表现出很好的相容性，有效提高复合材料弯曲强度和维卡软化温度（VST），增加复合材料的阻燃性能；复合材料弯曲强度随非金属粉添加量增加而增大，0.08 cm（180目）非金属粉添加量30％时可提高弯曲强度9.1 MPa，VST约提高2℃；小颗粒非金属粉有利于复合材料性能改善，可作为填料制作PP复合材料。

关键词:

电子废弃物, 废印刷电路板, 非金属粉, 聚丙烯, 复合材料