期刊
COMPOSITES PART B-ENGINEERING
卷 224, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.compositesb.2021.109218
关键词
Carbon fiber; Polycarbonate; Nanoparticles; Impregnation; Interfacial properties
资金
- Key Research and Development Project of Shanxi Province [201903D121004, 201903D121102]
- National Natural Science Foundation of China, Shanxi Province [U1810116]
- National Natural Science Foundation of China [51972170]
- CAS Key Laboratory of Carbon Materials [KLCMKFJJ2002]
- State Key Laboratory of Materials-Oriented Chemical Engineering [ZK201812]
- Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD)
- Jiangsu Specially-Appointed Professor Program, the Major science and technology projects of Shanxi Province [20181101020]
Coating CFs with PC-NPs significantly enhances resin impregnation around CFs and interfacial adhesion between CFs and PC matrix, resulting in a remarkable increase in interfacial shear strength of the CF/PC composite. Additionally, the tensile strength and flexural strength are also significantly improved through this approach.
The favorable interfacial properties of carbon fibers (CFs) and matrix are the key to the design and fabrication of a CF reinforced composite with superior micromechanical properties for various modern technological applications. However, high viscosity of a thermoplastic polymer makes resin infusion difficult, resulting in poor impregnation into CFs, ultimately leading to insufficient interfacial adhesion during composites fabrication process. Here the polycarbonate nanoparticles (PC-NPs) were pre-coated on the CFs from PC-NP aqueous solution and formed compact microstructure, which significantly improved the resin impregnation around CFs and interfacial adhesion between CFs and PC matrix. This PC-NP assisted CF/PC composite exhibits an increased interfacial shear strength up to 37.03 MPa, which is -67.25% higher than that of un-coated CF/PC composite. Moreover, the tensile strength and flexural strength are enhanced remarkably by -41.06% and -22.16% increase, respectively. These results therefore demonstrate that the attachment of thermoplastic PC-NPs is a facile, environmental-friendly and viable approach in design and modification of the interfacial properties of CFs and PC matrix, which can be expanded for other multifunctional CF-reinforced composites with unique micromechanical properties for various practical applications.
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