Durante Massimo, Boccarusso Luca, De Fazio Dario, Formisano Antonio, Langella Antonio
Department of Chemical, Materials and Production Engineering, University of Naples Federico II, Piazzale Tecchio 80, 80125 Naples, Italy.
Polymers (Basel). 2023 Feb 9;15(4):854. doi: 10.3390/polym15040854.
Carbon fiber-reinforced plastics (CFRPs) are composite materials that play a significant role in the growth of many industrial fields where high performance and lightness of the structures are required. At the same time, the management at the end of their life has required the development of more and more sustainable and efficient recycling solutions. Considering this, the present research work aims to investigate a mechanical recycling method and the cutting strategies able to machine CFRP components in their entirety, using a common milling machine in a job shop scheme, making a shorter supply chain, and leading to economic and environmental benefits. In detail, laminates obtained by unidirectional carbon fiber prepregs were worked through the peripheral down-milling process, by varying the spindle speed and the feed rate. The recording of the cutting forces enabled the evaluation of features such as the cutting power and the specific cutting energy. Moreover, the chips from the milling process were classified as a function of their dimensions. Finally, specimens made of chips and epoxy resin were characterized under bending conditions, to evaluate the effectiveness of using the chips from CFRP peripheral milling as the polymer's reinforcement and, in addition, to appreciate the goodness of this recycling strategy.
碳纤维增强塑料（CFRP）是一种复合材料，在许多需要结构高性能和轻量化的工业领域发展中发挥着重要作用。与此同时，其生命周期结束时的管理需要开发越来越可持续和高效的回收解决方案。考虑到这一点，本研究工作旨在研究一种机械回收方法以及切割策略，能够在车间方案中使用普通铣床对CFRP部件进行整体加工，缩短供应链，并带来经济和环境效益。具体而言，通过单向碳纤维预浸料获得的层压板通过周边向下铣削工艺进行加工，改变主轴转速和进给速度。切削力的记录使得能够评估诸如切削功率和比切削能等特征。此外，铣削过程产生的切屑根据其尺寸进行分类。最后，对由切屑和环氧树脂制成的试样进行弯曲条件下的表征，以评估将CFRP周边铣削产生的切屑用作聚合物增强材料的有效性，此外，还要评估这种回收策略的优点。
