Triboelectric separation is an efficiency and promising method to recycle waste plastics. Fluidized bed has been proved an optimal tribocharger with excellent bipolar charging performance for binary granules. In this work, the tribo-charging characteristics of PE, PP, PET and PVC granules during fluidization were investigated using a bench-scale fluidized bed. The results showed that the triboelectric series obtained by fluidization charging was: (−)-PVC–PET–PP–PE-(+). The study of fluidization tribo-charge rate of plastics showed that the fluidization charge rate of five binary granule combinations was PE–PVC > PP–PVC > PE–PET > PP–PET > PET–PVC. And the saturated charge-to-mass ratio of five combinations shared the same trend with the tribo-charging rate. In addition, the tribo-charging and the separation characteristics of the ternary granules, namely PP, PET, and PVC were analyzed, and the results showed that PP plastics were mainly distributed near the negative plate, while PET and PVC were close to the positive one.

摩擦电分离是回收废塑料的一种有效且有前景的方法。流化床已被证明是一种最佳的摩擦充电器，对二元颗粒具有优异的双极充电性能。在这项工作中，使用实验室规模的流化床研究了 PE、PP、PET 和 PVC 颗粒在流化过程中的摩擦带电特性。结果表明，流化充电得到的摩擦电级数为：(-)-PVC-PET-PP-PE-(+)。塑料流化摩擦带电率的研究表明，五种二元颗粒组合的流化带电率依次为 PE-PVC > PP-PVC > PE-PET > PP-PET > PET-PVC。并且五种组合的饱和荷质比与摩擦充电率具有相同的趋势。此外，