CFRP-Recycling Following a Pyrolysis Route: Process Optimization and Potentials
CFRP-Recycling Following a Pyrolysis Route: Process Optimization and Potentials
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DOI：
10.1177/0021998308097737
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发表时间：
2009-05-01
影响因子：
2.9
通讯作者：
Grove-Nielsen, E.
中科院分区：
文献类型：
--
作者：
Meyer, L. O.;Schulte, K.;Grove-Nielsen, E.
热解是一种众所周知的从复合材料废料中回收碳纤维的方法。为了将这些回收的碳纤维带回新的复合材料中，并为这种材料提供一个“闭环”，必须对它们的性能进行研究，并证明它们适合新产品。在以前的研究中，发现热解过程对回收纤维表面有很强的影响。这反过来又影响了其他性能，如纤维强度，电性能和纤维-基质的附着力。这些结果提供了控制再生碳纤维及其复合材料的单个性能的可能性，但另一方面，它们表明了工艺优化的必要性，以提供高质量的再生纤维。为了使再生碳纤维具有接近新纤维的性能，对热解过程中不同的工艺参数进行了研究和优化。在热重分析仪（TGA）上进行labscale热解实验，分别对热解温度、等温停留时间和烘箱气氛进行了优化。利用扫描电镜和拉曼光谱对回收的纤维进行了分析。最后进行了半工业规模热解试验，验证了优化工艺参数的技术可行性。
Pyrolysis is a well known method to recover carbon fibers from composite waste. In order to bring these recycled carbon fibers back into new composites, and to provide a 'closed loop' for this material, their properties have to be investigated and proved suitable for new products. In a former study a strong influence of the pyrolysis process on the surface of the recovered fibers was found. This in turn influenced other properties like fiber strength, electrical properties and fiber-matrixadhesion. These results offer the possibility to control individual properties of recycled carbon fibers and their composites, but on the other hand they indicate a necessity for process optimization in order to provide a high quality of the recycled fibers. In this study different process parameters during pyrolysis were investigated and optimized in order to provide the reclaimed carbon fibers with properties close to new fibers. The optimization was done by labscale pyrolysis experiments performed in a thermogravimetric analyzer (TGA), with variation of pyrolysis temperature, isothermal dwell time and oven atmosphere, respectively. The recovered fibers were analyzed by scanning electron microscopy and Raman spectroscopy. Finally a pyrolysis test on a semi-industrial-scale was successfully performed to demonstrate the technical viability of the optimized process parameters.