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Polymers
Volume 17
Issue 4
10.3390/polym17040483
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Article

Facile Enhancement of Mechanical Interfacial Strength of Recycled Carbon Fiber Web-Reinforced Polypropylene Composites via a Single-Step Silane Modification Process

by
Yeo-Jun Song
1,2,
Dong-Kyu Kim
1,2,
Woong Han
1,
Sun-Ho Choi
3,
Dong-Chul Chung
4,*,
Kwan-Woo Kim
1,* and
Byung-Joo Kim
5,*
1
Industrialization Division, Korea Carbon Industry Promotion Agency, Jeonju 54852, Republic of Korea
2
Department of Carbon Materials and Fiber Engineering, Jeonbuk University, Jeonju 54896, Republic of Korea
3
Department of Carbon Convergence Engineering, Jeonju University, Jeonju 55069, Republic of Korea
4
Department of Organic Materials and Textile Engineering, Jeonbuk National University, Jeonju 54896, Republic of Korea
5
Department of Materials Science and Chemical Engineering, Jeonju University, Jeonju 55069, Republic of Korea
*
Authors to whom correspondence should be addressed.
Polymers 2025, 17(4), 483; https://doi.org/10.3390/polym17040483
Submission received: 16 January 2025 / Revised: 7 February 2025 / Accepted: 8 February 2025 / Published: 12 February 2025
(This article belongs to the Special Issue Innovative Developments and Applications of Carbon Fiber Reinforced Thermoplastics)
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Abstract

In this study, a surface treatment process was introduced into the conventional dispersion process for preparing wet-laid nonwoven fabrics to improve their properties, using recycled carbon fibers (rCFs). The conventional binder solution was replaced with a solution containing different amounts of silane, and the changes in the fiber properties of the prepared nonwoven fabrics were examined after the addition of modified rCFs and polypropylene. FE-SEM analysis confirmed that a silane layer was formed on the rCF surface due to the formation of a siloxane network. FT-IR and XPS analyses further confirmed the presence of siloxane bonds and chemical modification of the rCF surface. When an optimal amount of silane content was used, the mechanical strength increased by 64% compared to untreated rCFs, owing to the improved molecular chain entanglement within the matrix. Our findings indicate that the simultaneous use of dispersion and a surface treatment can produce composites with excellent mechanical properties and improved processing and surface properties; thus, this method can be used to help upcycle rCFs, thereby expanding their applications.
Keywords: recycled carbon fiber; wet laid; silane treatment; composites recycled carbon fiber; wet laid; silane treatment; composites
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MDPI and ACS Style

Song, Y.-J.; Kim, D.-K.; Han, W.; Choi, S.-H.; Chung, D.-C.; Kim, K.-W.; Kim, B.-J. Facile Enhancement of Mechanical Interfacial Strength of Recycled Carbon Fiber Web-Reinforced Polypropylene Composites via a Single-Step Silane Modification Process. Polymers 2025, 17, 483. https://doi.org/10.3390/polym17040483

AMA Style

Song Y-J, Kim D-K, Han W, Choi S-H, Chung D-C, Kim K-W, Kim B-J. Facile Enhancement of Mechanical Interfacial Strength of Recycled Carbon Fiber Web-Reinforced Polypropylene Composites via a Single-Step Silane Modification Process. Polymers. 2025; 17(4):483. https://doi.org/10.3390/polym17040483

Chicago/Turabian Style

Song, Yeo-Jun, Dong-Kyu Kim, Woong Han, Sun-Ho Choi, Dong-Chul Chung, Kwan-Woo Kim, and Byung-Joo Kim. 2025. "Facile Enhancement of Mechanical Interfacial Strength of Recycled Carbon Fiber Web-Reinforced Polypropylene Composites via a Single-Step Silane Modification Process" Polymers 17, no. 4: 483. https://doi.org/10.3390/polym17040483

APA Style

Song, Y.-J., Kim, D.-K., Han, W., Choi, S.-H., Chung, D.-C., Kim, K.-W., & Kim, B.-J. (2025). Facile Enhancement of Mechanical Interfacial Strength of Recycled Carbon Fiber Web-Reinforced Polypropylene Composites via a Single-Step Silane Modification Process. Polymers, 17(4), 483. https://doi.org/10.3390/polym17040483

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