WijangWisnu Raharjo  ¹, Achmad Panji², Dody Ariawan¹, Heru Sukanto¹, and Bambang Kusharjanta¹

¹Mechanical Engineering Department, Sebelas Maret University, Jl. Ir. Sutami 36A, Surakarta 57126, Indonesia
²Undergraduate Student of Mechanical Engineering, Sebelas Maret University, Jl. Ir. Sutami 36A, Surakarta, Indonesia

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REFERENCES

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1. [1] Raul Piñero-Hernanz, Christopher Dodds, Jason Hyde, Juan García-Serna, Martyn Poliakoff, Edward Lester, María José Cocero, Sam Kingman, Stephen Pickering, and Kok Hoong Wong. Chemical recycling of carbon fibre reinforced composites in nearcritical and supercritical water. Composites Part A: Applied Science and Manufacturing, 39(3):454–461, 2008.
2. [2] Muhammad Furqan Khurshid, Martin Hengstermann, Mir Mohammad Badrul Hasan, Anwar Abdkader, and Chokri Cherif. Recent developments in the processing of waste carbon fibre for thermoplastic composites – A review, 2020.
3. [3] Robert A.Witik, Remy Teuscher, Véronique Michaud, Christian Ludwig, and Jan Anders E. Månson. Carbon fibre reinforced composite waste: An environmental assessment of recycling, energy recovery and landfilling. Composites Part A: Applied Science and Manufacturing, 49:89–99, 2013.
4. [4] Guangbin Cai, Masashi Wada, Isamu Ohsawa, Satoshi Kitaoka, and Jun Takahashi. Influence of treatment with superheated steam on tensile properties of carbon fiber. Composites Part A: Applied Science and Manufacturing, 107(August 2017):555–560, 2018.
5. [5] Peng Yang, Qian Zhou, Xiao Xue Yuan, Johannes M.N. Van Kasteren, and Yu Zhong Wang. Highly efficient solvolysis of epoxy resin using poly(ethylene glycol)/NaOH systems. Polymer Degradation and Stability, 97(7):1101–1106, 2012.
6. [6] Michael Sauer, Michael Kühnel, and Witten Elmar. Report - Composites Market Report 2018 - Market developments, trends, outlook and challenges. Carbon Composites, (september):1–44, 2018.
7. [7] Guangbin Cai, Masashi Wada, Isamu Ohsawa, Satoshi Kitaoka, and Jun Takahashi. Interfacial adhesion of recycled carbon fibers to polypropylene resin: Effect of superheated steam on the surface chemical state of carbon fiber. Composites Part A: Applied Science and Manufacturing, 120(October 2018):33–40, 2019.
8. [8] Fan Long Jin, Xiang Li, and Soo Jin Park. Synthesis and application of epoxy resins: A review, 2015.
9. [9] Shrikant K. Bobade, Nagarjuna Reddy Paluvai, Smita Mohanty, and S. K. Nayak. Bio-Based Thermosetting Resins for Future Generation: A Review, 2016.
10. [10] Sankar Karuppannan Gopalraj and Timo Kärki. A review on the recycling of waste carbon fibre/glass fibre-reinforced composites: fibre recovery, properties and life-cycle analysis, 2020.
11. [11] Hui Li and Karl Englund. Recycling of carbon fiberreinforced thermoplastic composite wastes from the aerospace industry. Journal of Composite Materials, 51(9):1265–1273, 2017.
12. [12] Liu Yuyan, Shan Guohua, and Meng Linghui. Recycling of carbon fibre reinforced composites using water in subcritical conditions. Materials Science and Engineering A, 520(1-2):179–183, 2009.
13. [13] Soraia Pimenta and Silvestre T. Pinho. Recycling carbon fibre reinforced polymers for structural applications: Technology review and market outlook. Waste Management, 31(2):378–392, 2011.
14. [14] Peng Hao Wang and Natalie Zimmermann. Composite Recycling Techniques: A Literature Review. Journal Material Science, 6(1):1–7, 2020.
15. [15] Filip Stojcevski, Timothy B. Hilditch, Thomas R. Gengenbach, and Luke C. Henderson. Effect of carbon fiber oxidization parameters and sizing deposition levels on the fiber-matrix interfacial shear strength. Composites Part A: Applied Science and Manufacturing, 114(May):212–224, 2018.
16. [16] D. K. Owens and R. C.Wendt. Estimation of the surface free energy of polymers. Journal of Applied Polymer Science, 13(8):1741–1747, 1969.
17. [17] M Z˙ enkiewicz. Methods for the calculation of surface free energy of solids. Journal of Achievements in Materials and Manufacturing Engineering, 24(1):137–145, 2007.
18. [18] S. Wong, R. A. Shanks, and A. Hodzic. Effect of additives on the interfacial strength of poly(l-lactic acid) and poly(3-hydroxy butyric acid)-flax fibre composites. Composites Science and Technology, 67(11-12):2478–2484, 2007.
19. [19] Jianjun Jiang, Guoli Deng, Xing Chen, Xinyu Gao, Qiang Guo, Chumeng Xu, and Linchao Zhou. On the successful chemical recycling of carbon fiber/epoxy resin composites under the mild condition. Composites Science and Technology, 151:243–251, 2017.
20. [20] D. W. Van Krevelen and Klaas Te Nijenhuis. Properties of Polymers. 2009.
21. [21] Recycling of carbon fibers inserted in composite of DGEBA epoxy matrix by thermal degradation. Polymer Degrada, 109:50–58, 2014.
22. [22] Harpreet Singh Bedi, Sunil Kumar, and Prabhat K. Agnihotri. Wettability of thermoplastic and thermoset polymers with carbon nanotube grafted carbon fiber. In Materials Today: Proceedings, volume 41, pages 838–842. Elsevier Ltd, 2020.
23. [23] Mohammad Z. Rahman, Jakob Thyr, and Tomas Edvinsson.
    Surface polarity, water adhesion and wettability behaviors of iron pyrite. In Materials Today: Proceedings, volume 33, pages 2465–2469. Elsevier Ltd., 2019.

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Received: November 9, 2020
Accepted: May 10, 2021
Publication Date: June 23, 2021

 Copyright The Author(s). This is an open access article distributed under the terms of the Creative Commons Attribution License (CC BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are cited.

Download Citation: RIS|BibTeX|https://doi.org/10.6180/jase.202112_24(6).0008  

ABSTRACT

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In this paper, the recycling process of carbon fiber/epoxy composites is carried out with chemical solutions. Separation of carbon fiber from the epoxy resin was carried out in 2 steps: the initial dissolution and fiber separation. On initial dissolution, the composites were immersed in the solvent nitric acid. Furthermore, for fiber separation, the composites were immersed in macrogol 400 solvent and potassium hydroxide (KOH)
catalyst. The immersion time varied, ranging from 80 to 120, 160, and 200 minutes. The effect of chemical recycling on recycled carbon fiber (RCF) properties, wettability, and interface adhesion behavior in unsaturated polyester (UP) was investigated. The results showed that the chemical recycling process using nitric acid and solvolysis (PEG 400 / KOH) succeeded in extracting carbon fibers from epoxy composites. Soaking time affected the recycled fiber properties. The highest tensile strength of recycled carbon fiber at 2,911.98 MPa was obtained at 160 minutes of immersion (S160). At this immersion time, it was also found that the highest interface bond was 20.71 MPa and the surface free energy for wettability was 31.68 mN/m.

Keywords: Chemical recycling, Carbon fiber, Wettability, Interfacial Bonding