Effects of constituent materials on resin separation from CFRP by electrical treatment

IF 2.7 4区材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Letters Pub Date : 2024-11-26 DOI:10.1016/j.matlet.2024.137786

Shinya Matsuda , Yuki Yoshikawa , Kazumasa Oshima

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引用次数: 0

Abstract

Carbon fiber-reinforced plastics (CFRP) waste is typically recycled through feedstock recycling, which recovers carbon fibers from CFRP by employing an aggressive thermal process to break down the resin matrix. However, this process faces challenges, as oxygen gas during heating has difficulty penetrating dense composites, resulting in low-quality recovered carbon fibers (rCFs). It was demonstrated that high-grade rCFs could be obtained by combining the thermal process with a short period of electrical treatment (ET). In this study, we investigated the effects of fiber orientation and matrix type on the separation efficiency (SE) by ET using uni-directional (UD-) and plain-weave (PW-) CFRPs, as well as twill-weave CFRTP. The results indicated that the SE value of UD-CFRP was nearly equal to that of PW-CFRP, suggesting that fiber orientation did not significantly affect resin removal. In contrast, the SE value of CFRTP was four times higher than that of CFRPs at a low constant voltage, as the separation resistance of the matrix decreased owing to thermal-oxidative degradation caused by moderate temperatures resulting from Joule heat and oxygen generated on the anode side.

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来源期刊

Materials Letters 工程技术-材料科学：综合

CiteScore

5.60

自引率

3.30%

发文量

1948

审稿时长

50 days

期刊介绍： Materials Letters has an open access mirror journal Materials Letters: X, sharing the same aims and scope, editorial team, submission system and rigorous peer review. Materials Letters is dedicated to publishing novel, cutting edge reports of broad interest to the materials community. The journal provides a forum for materials scientists and engineers, physicists, and chemists to rapidly communicate on the most important topics in the field of materials. Contributions include, but are not limited to, a variety of topics such as: • Materials - Metals and alloys, amorphous solids, ceramics, composites, polymers, semiconductors • Applications - Structural, opto-electronic, magnetic, medical, MEMS, sensors, smart • Characterization - Analytical, microscopy, scanning probes, nanoscopic, optical, electrical, magnetic, acoustic, spectroscopic, diffraction • Novel Materials - Micro and nanostructures (nanowires, nanotubes, nanoparticles), nanocomposites, thin films, superlattices, quantum dots. • Processing - Crystal growth, thin film processing, sol-gel processing, mechanical processing, assembly, nanocrystalline processing. • Properties - Mechanical, magnetic, optical, electrical, ferroelectric, thermal, interfacial, transport, thermodynamic • Synthesis - Quenching, solid state, solidification, solution synthesis, vapor deposition, high pressure, explosive