Water-based SPEKK sizing agent for improving the mechanical properties of CF/PEKK composites

被引：0
|
作者：
Yang X. [1 ,3 ]
Ren H. [1 ,3 ]
Luo J. [1 ,3 ]
Xue Y. [1 ,3 ]
Tao T. [1 ]
Liu Y. [1 ]
Zhang H. [1 ,2 ,3 ]
Yu J. [3 ]
机构：
[1] State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai
[2] Engineering Research Center of Technical Textiles, Ministry of Education, Donghua University, Shanghai
[3] Center for Civil Aviation Composites, Donghua University, Shanghai
来源：
Fuhe Cailiao Xuebao/Acta Materiae Compositae Sinica | 2023年 / 40卷 / 11期
关键词：
carbon fiber/polyetherketoneketone composites; interfacial modification; mechanical properties; sulfonated polyetherketoneketone; water-based sizing agent;
D O I：
10.13801/j.cnki.fhclxb.20230626.001
中图分类号：
学科分类号：
摘要：
The interfacial interactions between carbon fiber (CF) and polyetherketoneketone (PEKK) are poor due to the chemical inertness of CF, limiting the mechanical properties of carbon fiber reinforced polyetherketoneketone (CF/PEKK) composites. In this study, a water-based sizing agent of sulfonated polyetherketoneketone (SPEKK) was prepared by sulfonating domestic PEKK resin, in order to improve the mechanical properties of CF/PEKK composites. By regulating the sulfonation degree, the stable SPEKK aqueous emulsion was obtained and used for CF sizing modification. Subsequently, CF/PEKK composites were fabricated via vacuum hot-press technique. When the concentration of SPEKK aqueous emulsion was 0.5wt%, the flexural strength, flexural modulus and interlaminar shear strength of the modified CF/PEKK composites reached 1 237 MPa, 78 GPa, and 92 MPa, which were 35.5%, 5.4%, and 26.0% higher than that of the unmodified CF/PEKK composites, respectively. Such enhancement in mechanical properties could be attributed to the introduced SPEKK on the CF surfaces, which could form hydrogen bonds and π-π interactions with CF, as well as π-π interactions and diffusion and entanglement with PEKK, significantly promoting the interfacial bonding between CF and PEKK. As a simpler process, CF surface modification with water-based SPEKK sizing agent is environmentally friendly and suitable for the industrial production, which is of great significance for the development of domestic high-performance carbon fiber reinforced thermoplastic composites. © 2023 Beijing University of Aeronautics and Astronautics (BUAA). All rights reserved.
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页码：6061 / 6072
页数：11
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