Trend AnalysisEngineering
Carbon Fibre Composite Recycling: Closing the Loop on Lightweight Materials
Carbon fibre reinforced polymers (CFRPs) are the lightweight material of choice for aerospace, automotive, and wind energy applications โ offering strength-to-weight ratios ~5x that of steel. Global c...
By Sean K.S. Shin
This blog summarizes research trends based on published paper abstracts. Specific numbers or findings may contain inaccuracies. For scholarly rigor, always consult the original papers cited in each post.
The Question
Carbon fibre reinforced polymers (CFRPs) are the lightweight material of choice for aerospace, automotive, and wind energy applications โ offering strength-to-weight ratios ~5x that of steel. Global carbon fibre demand reached approximately 117,500 tonnes in 2023 and is growing toward an estimated 280,000 tonnes by 2030. But CFRPs are notoriously difficult to recycle: the thermoset resins that bind carbon fibres are cross-linked and cannot be re-melted. With end-of-life aircraft (Boeing 787 is 50% CFRP by weight) and wind turbine blades accumulating, the industry faces a waste crisis. Can recycling technologies recover carbon fibres at quality and cost levels that make re-use commercially viable?
Landscape
Aldosari et al. (2024) provided a comprehensive review of mechanical recycling for CFRPs โ the simplest and lowest-cost approach. Mechanical recycling involves shredding, grinding, and milling composites into fibrous or powdered fractions. The key trade-off: processing reduces fibre length and introduces surface damage, degrading mechanical properties compared to virgin fibres. The resulting short-fibre recyclate is suitable for injection moulding and sheet moulding compounds but not for primary structural applications.
Dos Santos et al. (2025) explored a value-added path for mechanically recycled carbon fibres: hybrid composites incorporating carbon nanotubes for electromagnetic interference (EMI) shielding applications. By pairing recycled CF (providing bulk conductivity) with CNTs (providing percolation network enhancement), they achieved EMI shielding effectiveness of 25 dB in the X-band, demonstrating the potential of recycled fibres for functional electromagnetic applications when combined with nanomaterial augmentation.
Balaga et al. (2025) optimised the recycling process for aligned short carbon fibre composites (TuFF โ Tailored Universal Feedstock for Forming), showing that controlled fibre alignment during re-processing achieves full modulus translation (~128 GPa) but ~50% strength translation compared to virgin continuous composites.
Zhang et al. (2024) demonstrated an alternative end-use for carbon fibre composites: structural supercapacitors that simultaneously store energy and bear mechanical loads. By coating carbon fibre with graphene oxide, they created multifunctional composites that serve as both structural members and energy storage devices โ a circular-economy approach where carbon fibre composites gain new functionality.
Key Claims & Evidence
<
| Claim | Evidence | Verdict |
|---|
| Mechanical recycling degrades fibre properties | Systematic characterisation of recycled vs. virgin CF (Aldosari et al. 2024) | Confirmed; limits recyclate to non-structural applications |
| Hybrid composites can restore recycled CF performance | Recycled CF + CNT achieves 25 dB EMI shielding in X-band (dos Santos et al. 2025) | Supported for EMI applications; structural recovery less clear |
| Fibre alignment during re-processing improves recycled CF properties | TuFF composites show enhanced mechanical performance with controlled alignment (Balaga et al. 2025) | Supported; alignment control adds processing complexity |
| Multifunctional composites offer circular-economy pathways | Structural supercapacitors from CF/graphene oxide (Zhang et al. 2024) | Proof-of-concept; energy density still low vs. dedicated batteries |
Open Questions
Chemical vs. mechanical recycling: Pyrolysis and solvolysis recover longer, higher-quality fibres but at higher energy and chemical cost. Under what conditions does each approach have lower total environmental impact?
Thermoplastic CFRPs: Thermoplastic matrices (PEEK, PEKK) are inherently re-meltable. Can the industry transition from thermoset to thermoplastic CFRPs to eliminate the recycling problem at source?
Regulatory mandates: The EU End-of-Life Vehicles Directive requires 85% recyclability (and 95% recoverability, which includes energy recovery). Can CFRP-intensive vehicles meet this target with current recycling technologies?
Economic viability: Virgin carbon fibre costs approximately $20โ50/kg depending on grade (standard ~$20โ35/kg; aerospace grade $40โ50/kg+). At what price must recycled CF be sold to compete, and can recycling operations achieve this while covering processing costs?Referenced Papers
- [1] Aldosari, S. et al. (2024). Mechanical Recycling of CFRP in a Circular Economy. Polymers, 16(10), 1363. DOI: 10.3390/polym16101363
- [2] Zhang, Z. et al. (2024). Graphene oxide/carbon fiber composite structural supercapacitor. Advanced Composites and Hybrid Materials. DOI: 10.1007/s42114-024-01085-0
- [3] dos Santos, M.S. et al. (2025). Mechanical recycling of CF composites for electromagnetic applications. Polymer Engineering & Science. DOI: 10.1002/pen.27163
- [4] Sharma, J. et al. (2025). Advances in carbon and glass fiber recycling. J. Material Cycles and Waste Management. DOI: 10.1007/s10163-025-02342-0
- [5] Balaga, U.K. et al. (2025). Optimization of the Recycling Process for Aligned Short CF TuFF Composites. Recycling, 10(2), 55. DOI: 10.3390/recycling10020055
๋ฉด์ฑ
์กฐํญ: ์ด ๊ฒ์๋ฌผ์ ์ ๋ณด ์ ๊ณต์ ๋ชฉ์ ์ผ๋ก ํ ์ฐ๊ตฌ ๋ํฅ ๊ฐ์์ด๋ค. ํ์ ์ฐ๊ตฌ์์ ์ธ์ฉํ๊ธฐ ์ ์ ๊ตฌ์ฒด์ ์ธ ์ฐ๊ตฌ ๊ฒฐ๊ณผ, ํต๊ณ ๋ฐ ์ฃผ์ฅ์ ์๋ณธ ๋
ผ๋ฌธ๊ณผ ๋์กฐํ์ฌ ๊ฒ์ฆํด์ผ ํ๋ค.
ํ์ ์ฌ์ ๋ณตํฉ์ฌ ์ฌํ์ฉ: ๊ฒฝ๋ ์์ฌ์ ์ํ ๊ณ ๋ฆฌ ์์ฑ
๋ถ์ผ: ๊ณตํ | ๋ฐฉ๋ฒ๋ก : ์คํ์ ๊ฒํ
์ ์: Sean K.S. Shin | ๋ ์ง: 2026-03-17
์ฐ๊ตฌ ์ง๋ฌธ
ํ์ ์ฌ์ ๊ฐํ ํด๋ฆฌ๋จธ(CFRP)๋ ํญ๊ณต์ฐ์ฃผ, ์๋์ฐจ, ํ๋ ฅ ์๋์ง ๋ถ์ผ์์ ์ ํธ๋๋ ๊ฒฝ๋ ์์ฌ๋ก, ๊ฐ์ฒ ๋๋น ์ฝ 5๋ฐฐ์ ๋น๊ฐ๋๋ฅผ ์ ๊ณตํ๋ค. ์ ์ธ๊ณ ํ์ ์ฌ์ ์์๋ 2023๋
์ฝ 117,500ํค์ ๋ฌํ์ผ๋ฉฐ, 2030๋
๊น์ง ์ฝ 280,000ํค์ผ๋ก ์ฑ์ฅํ ๊ฒ์ผ๋ก ์ถ์ ๋๋ค. ๊ทธ๋ฌ๋ CFRP๋ ์ฌํ์ฉ์ด ๋งค์ฐ ์ด๋ ต๋ค. ํ์ ์ฌ์ ๋ฅผ ๊ฒฐํฉํ๋ ์ด๊ฒฝํ์ฑ ์์ง๋ ๊ฐ๊ต ๊ฒฐํฉ๋์ด ์์ด ์ฌ์ฉ์ต์ด ๋ถ๊ฐ๋ฅํ๊ธฐ ๋๋ฌธ์ด๋ค. ์๋ช
์ด ๋คํ ํญ๊ณต๊ธฐ(Boeing 787์ ์ค๋ ๊ธฐ์ค 50%๊ฐ CFRP)์ ํ๋ ฅ ํฐ๋น ๋ธ๋ ์ด๋๊ฐ ์์ฌ๊ฐ๋ฉด์, ์
๊ณ๋ ํ๊ธฐ๋ฌผ ์๊ธฐ์ ์ง๋ฉดํด ์๋ค. ์ฌํ์ฉ ๊ธฐ์ ์ด ์์
์ ์ผ๋ก ์ฌ์ฌ์ฉ ๊ฐ๋ฅํ ์์ค์ ํ์ง๊ณผ ๋น์ฉ์ผ๋ก ํ์ ์ฌ์ ๋ฅผ ํ์ํ ์ ์์ ๊ฒ์ธ๊ฐ?
์ฐ๊ตฌ ๋ํฅ
Aldosari et al. (2024)์ CFRP์ ๋ํ ๊ธฐ๊ณ์ ์ฌํ์ฉโ๊ฐ์ฅ ๋จ์ํ๊ณ ๋น์ฉ์ด ๋ฎ์ ๋ฐฉ์โ์ ํฌ๊ด์ ์ธ ๊ฒํ ๋ฅผ ์ ๊ณตํ์๋ค. ๊ธฐ๊ณ์ ์ฌํ์ฉ์ ๋ณตํฉ์ฌ๋ฅผ ํ์, ๋ถ์, ๋ฐ๋งํ์ฌ ์ฌ์ ์ ๋๋ ๋ถ๋ง ํํ์ ๋ถํ์ผ๋ก ๋ง๋๋ ๊ณผ์ ์ ํฌํจํ๋ค. ํต์ฌ ํธ๋ ์ด๋์คํ๋ ๋ค์๊ณผ ๊ฐ๋ค. ๊ฐ๊ณต ๊ณผ์ ์์ ์ฌ์ ๊ธธ์ด๊ฐ ์ค์ด๋ค๊ณ ํ๋ฉด ์์์ด ๋ฐ์ํ์ฌ, ๋ฒ์ง ์ฌ์ ๋๋น ๊ธฐ๊ณ์ ํน์ฑ์ด ์ ํ๋๋ค. ๊ทธ ๊ฒฐ๊ณผ ์์ฑ๋ ๋จ์ฌ์ ์ฌํ์ฉ ์์ฌ๋ ์ฌ์ถ ์ฑํ ๋ฐ ์ํธ ์ฑํ ํํฉ๋ฌผ์๋ ์ ํฉํ์ง๋ง, 1์ฐจ ๊ตฌ์กฐ์ฉ ์์ฉ์๋ ์ ํฉํ์ง ์๋ค.
Dos Santos et al. (2025)์ ๊ธฐ๊ณ์ ์ผ๋ก ์ฌํ์ฉ๋ ํ์ ์ฌ์ ์ ๊ณ ๋ถ๊ฐ๊ฐ์น ํ์ฉ ๊ฒฝ๋ก๋ฅผ ํ๊ตฌํ์๋ค. ๋ฐ๋ก ์ ์๊ธฐ ๊ฐ์ญ(EMI) ์ฐจํ ์์ฉ์ ์ํ ํ์ ๋๋
ธํ๋ธ ํผ์
ํ์ด๋ธ๋ฆฌ๋ ๋ณตํฉ์ฌ์ด๋ค. ์ฌํ์ฉ CF(์ ์ฒด ์ ๋์ฑ ์ ๊ณต)์ CNT(ํผ์ฝ๋ ์ด์
๋คํธ์ํฌ ํฅ์ ์ ๊ณต)๋ฅผ ๊ฒฐํฉํจ์ผ๋ก์จ X-๋ฐด๋์์ 25 dB์ EMI ์ฐจํ ํจ๊ณผ๋ฅผ ๋ฌ์ฑํ์์ผ๋ฉฐ, ์ด๋ ๋๋
ธ ์์ฌ ๋ณด๊ฐ๊ณผ ๊ฒฐํฉ๋ ๊ฒฝ์ฐ ์ฌํ์ฉ ์ฌ์ ๊ฐ ๊ธฐ๋ฅ์ฑ ์ ์๊ธฐ ์์ฉ์ ์ ์ฌ๋ ฅ์ด ์์์ ์
์ฆํ์๋ค.
Balaga et al. (2025)์ ์ ๋ ฌ๋ ๋จ์ฌ์ ํ์ ๋ณตํฉ์ฌ(TuFF โ Tailored Universal Feedstock for Forming)์ ์ฌํ์ฉ ๊ณต์ ์ ์ต์ ํํ์ฌ, ์ฌ๊ฐ๊ณต ์ ์ ์ด๋ ์ฌ์ ์ ๋ ฌ์ ํตํด ์์ ํ ํ์ฑ๋ฅ ์ ๋ฌ(~128 GPa)์ ๋ฌ์ฑํ์ง๋ง ๋ฒ์ง ์ฐ์ ๋ณตํฉ์ฌ ๋๋น ๊ฐ๋ ์ ๋ฌ์ ~50% ์์ค์์ ๋ณด์๋ค.
Zhang et al. (2024)์ ํ์ ์ฌ์ ๋ณตํฉ์ฌ์ ๋์์ ์ต์ข
์ฉ๋๋ฅผ ์ ์ํ์๋ค. ๋์์ ์๋์ง๋ฅผ ์ ์ฅํ๊ณ ๊ธฐ๊ณ์ ํ์ค์ ์ง์งํ๋ ๊ตฌ์กฐ์ ์ํผ์ปคํจ์ํฐ์ด๋ค. ํ์ ์ฌ์ ๋ฅผ ์ฐํ ๊ทธ๋ํ์ผ๋ก ์ฝํ
ํจ์ผ๋ก์จ ๊ตฌ์กฐ ๋ถ์ฌ์ ์๋์ง ์ ์ฅ ์ฅ์น ์ญํ ์ ๋์์ ์ํํ๋ ๋ค๊ธฐ๋ฅ ๋ณตํฉ์ฌ๋ฅผ ์ ์ํ์๋ค. ์ด๋ ํ์ ์ฌ์ ๋ณตํฉ์ฌ๊ฐ ์๋ก์ด ๊ธฐ๋ฅ์ฑ์ ํ๋ํ๋ ์ํ ๊ฒฝ์ ์ ์ ๊ทผ ๋ฐฉ์์ด๋ค.
ํต์ฌ ์ฃผ์ฅ ๋ฐ ๊ทผ๊ฑฐ
<
| ์ฃผ์ฅ | ๊ทผ๊ฑฐ | ํ๊ฐ |
|---|
| ๊ธฐ๊ณ์ ์ฌํ์ฉ์ ์ฌ์ ํน์ฑ์ ์ ํ์ํจ๋ค | ์ฌํ์ฉ CF์ ๋ฒ์ง CF์ ์ฒด๊ณ์ ํน์ฑ ๋ถ์ (Aldosari et al. 2024) | ํ์ธ๋จ; ์ฌํ์ฉ ์์ฌ๋ฅผ ๋น๊ตฌ์กฐ์ ์์ฉ์ผ๋ก ์ ํ |
| ํ์ด๋ธ๋ฆฌ๋ ๋ณตํฉ์ฌ๋ ์ฌํ์ฉ CF์ ์ฑ๋ฅ์ ํ๋ณต์ํฌ ์ ์๋ค | ์ฌํ์ฉ CF + CNT๊ฐ X-๋ฐด๋์์ 25 dB EMI ์ฐจํ ๋ฌ์ฑ (dos Santos et al. 2025) | EMI ์์ฉ์ ๋ํด ์ง์ง๋จ; ๊ตฌ์กฐ์ ํ๋ณต์ ๋ถ๋ถ๋ช
|
| ์ฌ๊ฐ๊ณต ์ค ์ฌ์ ์ ๋ ฌ์ด ์ฌํ์ฉ CF ํน์ฑ์ ํฅ์์ํจ๋ค | TuFF ๋ณตํฉ์ฌ๊ฐ ์ ์ด๋ ์ ๋ ฌ์ ํตํด ํฅ์๋ ๊ธฐ๊ณ์ ์ฑ๋ฅ์ ๋ณด์ (Balaga et al. 2025) | ์ง์ง๋จ; ์ ๋ ฌ ์ ์ด๋ ๊ฐ๊ณต ๋ณต์ก์ฑ์ ์ถ๊ฐํจ |
| ๋ค๊ธฐ๋ฅ ๋ณตํฉ์ฌ๋ ์ํ ๊ฒฝ์ ์ ๊ฒฝ๋ก๋ฅผ ์ ๊ณตํ๋ค | CF/์ฐํ ๊ทธ๋ํ์ผ๋ก ์ ์ํ ๊ตฌ์กฐ์ ์ํผ์ปคํจ์ํฐ (Zhang et al. 2024) | ๊ฐ๋
์ฆ๋ช
๋จ๊ณ; ์๋์ง ๋ฐ๋๋ ์ ์ฉ ๋ฐฐํฐ๋ฆฌ ๋๋น ์ฌ์ ํ ๋ฎ์ |
๋ฏธํด๊ฒฐ ๊ณผ์
ํํ์ ์ฌํ์ฉ vs. ๊ธฐ๊ณ์ ์ฌํ์ฉ: ์ด๋ถํด์ ์ฉ๋งค๋ถํด๋ ๋ ๊ธธ๊ณ ํ์ง์ด ๋์ ์ฌ์ ๋ฅผ ํ์ํ์ง๋ง ์๋์ง ๋ฐ ํํ๋ฌผ์ง ๋น์ฉ์ด ๋ ๋๋ค. ์ด๋ค ์กฐ๊ฑด์์ ๊ฐ ๋ฐฉ๋ฒ์ด ๋ ๋ฎ์ ์ด ํ๊ฒฝ ์ํฅ์ ๊ฐ์ง๋๊ฐ?
์ด๊ฐ์์ฑ CFRP: ์ด๊ฐ์์ฑ ๋งคํธ๋ฆญ์ค(PEEK, PEKK)๋ ๋ณธ์ง์ ์ผ๋ก ์ฌ์ฉ์ต์ด ๊ฐ๋ฅํ๋ค. ์ฐ์
๊ณ๊ฐ ์ด๊ฒฝํ์ฑ CFRP์์ ์ด๊ฐ์์ฑ CFRP๋ก ์ ํํ์ฌ ์ฌํ์ฉ ๋ฌธ์ ๋ฅผ ๊ทผ์์ ์ผ๋ก ์ ๊ฑฐํ ์ ์๋๊ฐ?
๊ท์ ์๋ฌด: EU ํ์ฐจ ์ง์นจ(End-of-Life Vehicles Directive)์ 85%์ ์ฌํ์ฉ ๊ฐ๋ฅ์ฑ(์๋์ง ํ์๋ฅผ ํฌํจํ 95%์ ํ์ ๊ฐ๋ฅ์ฑ)์ ์๊ตฌํ๋ค. CFRP๋ฅผ ์ง์ค์ ์ผ๋ก ์ฌ์ฉํ๋ ์ฐจ๋์ด ํ์ฌ์ ์ฌํ์ฉ ๊ธฐ์ ๋ก ์ด ๋ชฉํ๋ฅผ ๋ฌ์ฑํ ์ ์๋๊ฐ?
๊ฒฝ์ ์ ํ๋น์ฑ: ๋ฒ์ง ํ์ ์ฌ์ ์ ๋น์ฉ์ ๋ฑ๊ธ์ ๋ฐ๋ผ ์ฝ $20โ50/kg์ด๋ค(ํ์ค ~$20โ35/kg; ํญ๊ณต์ฐ์ฃผ ๋ฑ๊ธ $40โ50/kg+). ์ฌํ์ฉ CF๊ฐ ๊ฒฝ์๋ ฅ์ ๊ฐ์ถ๊ธฐ ์ํด ์ด๋ค ๊ฐ๊ฒฉ์ ํ๋งค๋์ด์ผ ํ๋ฉฐ, ์ฌํ์ฉ ์ด์์ด ์ฒ๋ฆฌ ๋น์ฉ์ ์ถฉ๋นํ๋ฉด์ ์ด๋ฅผ ๋ฌ์ฑํ ์ ์๋๊ฐ?References (5)
Aldosari, S. M., AlOtaibi, B. M., Alblalaihid, K. S., Aldoihi, S. A., AlOgab, K. A., Alsaleh, S. S., et al. (2024). Mechanical Recycling of Carbon Fiber-Reinforced Polymer in a Circular Economy. Polymers, 16(10), 1363.
Zhang, Z., Shen, L., Xu, X., Guo, J., Liu, Y., Zhang, J., et al. (2025). Graphene oxide/carbon fiber composite structural supercapacitor with stable electrochemical performance under surface load bearing. Advanced Composites and Hybrid Materials, 8(1).
dos Santos, M. S., dos Anjos, E. G. R., Montagna, L. S., & Passador, F. R. (2025). Mechanical recycling of carbon fiber composites: Development of hybrid composites of epoxy resin, carbon fiber, and carbon nanotubes for functional electromagnetic applications. Polymer Engineering & Science, 65(5), 2500-2512.
Sharma, J., Shukla, S., Ramana, G. V., & Behera, B. K. (2025). Advances in carbon and glass fiber recycling: optimal composite recycling and sustainable solutions for composite waste. Journal of Material Cycles and Waste Management, 27(5), 3166-3195.
Balaga, U. K., Gunes, A., Ozdemir, T., Blackwell, C., Davis, M., Sauerbrunn, S., et al. (2025). Optimization of the Recycling Process for Aligned Short Carbon Fiber TuFF Composites. Recycling, 10(2), 55.