Martínez-Franco Enrique, Gomez Culebro Victor Alfonzo, Franco-Urquiza E A
Manufacturing Department, Center for Engineering and Industrial Development, Av. Pie de la Cuesta 702-No. 702, Desarrollo San Pablo, Santiago de Querétaro 76125, Mexico.
Aerospace Section, Center for Engineering and Industrial Development, Carretera Estatal 200, km 23, Queretaro 76270, Mexico.
Polymers (Basel). 2024 Aug 20;16(16):2350. doi: 10.3390/polym16162350.
Carbon fiber reinforced polymer (CFRP) composites have very high specific properties, which is why they are used in the aerospace, wind power, and sports sectors. However, the high consumption of CFRP compounds leads to a high volume of waste, and it is necessary to formulate mechanical recycling strategies for these materials at the end of their useful life. The recycling differences between cutting-end mills and high-energy ball milling (HEBM) were evaluated. HEBM recycling allowed us to obtain small recycled particles, but separating their components, carbon fiber, epoxy resin, and CFRP particles, was impossible. In the case of mill recycling, these were obtained directly from cutting a CFRP composite laminate. The recycled materials resulted in a combination of long fibers and micrometric particles-a sieving step allowed for more homogeneous residues. Although long, individual carbon fibers can pass through the sieve. Ultrasonication did not significantly affect HEBM recyclates because of the high energy they are subjected to during the grinding process, but it was influential on end mill recyclates. The ultrasonication amplitude notably impacted the separation of the epoxy resin from the carbon fiber. The end mill and HEBM waste production process promote the presence of trapped air and electrostatics, which allows recyclates to float in water and be hydrophobic.
碳纤维增强聚合物（CFRP）复合材料具有非常高的比性能，这就是它们被用于航空航天、风力发电和体育领域的原因。然而，CFRP复合材料的高消耗量导致大量废物产生，因此有必要在这些材料使用寿命结束时制定机械回收策略。评估了立铣刀和高能球磨（HEBM）之间的回收差异。高能球磨回收使我们能够获得小的回收颗粒，但无法分离其成分，即碳纤维、环氧树脂和CFRP颗粒。在铣削回收的情况下，这些颗粒直接从切割CFRP复合层压板获得。回收材料产生了长纤维和微米级颗粒的组合——筛分步骤可得到更均匀的残渣。尽管单个长碳纤维可以通过筛网。超声处理对高能球磨回收物没有显著影响，因为它们在研磨过程中受到高能量作用，但对立铣刀回收物有影响。超声振幅显著影响环氧树脂与碳纤维的分离。立铣刀和高能球磨的废物生产过程促进了 trapped air和静电的存在，这使得回收物能够漂浮在水中并具有疏水性。
