China Environmental Science Research Institute, Beijing, Postal Code 100012, PR China.
J Environ Manage. 2010 Dec;91(12):2505-10. doi: 10.1016/j.jenvman.2010.07.014. Epub 2010 Aug 21.
The study is directed to the use of non-metallic powders obtained from comminuted recycled paper-based printed circuit boards (PCBs) as an additive to polyvinyl chloride (PVC) substrate. The physical properties of the non-metallic PCB (NMPCB) powders were measured, and the morphological, mechanical and thermal properties of the NMPCB/PVC composite material were investigated. The results show that recycled NMPCB powders, when added below a threshold, tended to increase the tensile strength and bending strength of PVC. When 20 wt% NMPCB powders (relative to the substrate PVC) of an average diameter of 0.08 mm were added, the composite tensile strength and bending strength reached 22.6 MPa and 39.83 MPa, respectively, representing 107.2% and 123.1% improvement over pure PVC. The elongation at break of the composite material reached 151.94% of that of pure PVC, while the Vicat softening temperature of the composite material did not increase significantly compared to the pure PVC. The above results suggest that paper-based NMPCB powders, when used at appropriate amounts, can be effective for toughening PVC. Thus, this study suggests a new route for reusing paper-based NMPCB, which may have a significant beneficial environmental impact.
本研究旨在将粉碎后的基于印刷电路板（PCB）的回收纸制非金属粉末作为添加剂用于聚氯乙烯（PVC）基材。测量了非金属 PCB（NMPCB）粉末的物理性能，并研究了 NMPCB/PVC 复合材料的形态、机械和热性能。结果表明，当添加量低于阈值时，回收的 NMPCB 粉末往往会提高 PVC 的拉伸强度和弯曲强度。当添加 20wt%（相对于基体 PVC）平均粒径为 0.08mm 的 NMPCB 粉末时，复合材料的拉伸强度和弯曲强度分别达到 22.6MPa 和 39.83MPa，分别比纯 PVC 提高了 107.2%和 123.1%。复合材料的断裂伸长率达到纯 PVC 的 151.94%，而复合材料的维卡软化温度与纯 PVC 相比没有显著增加。上述结果表明，适量使用基于纸张的 NMPCB 粉末可以有效增韧 PVC。因此，本研究为回收基于纸张的 NMPCB 提供了一条新途径，可能对环境有重大的有益影响。
