A. M. Hassan, Mengyun Xiong, Zhu Shu*, Yu Muhuo*. 1. State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, Donghua University, ...
Effect of graphene oxide on interface of carbon fiber/polyetheretherketone composites for aerospace application Elwathig. A. M. Hassan, Mengyun Xiong, Zhu Shu*, Yu Muhuo* 1. State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, Donghua University, North Renmin Rd. 2999, Songjiang District, Shanghai 201620, China. 2. Key Laboratory of Shanghai City for lightweight composites, Center for civil aviation composites, Donghua University, Shanghai 201620, China.
1. Introduction CF-PEEK composites
3. Results and discussion
4.5 Dynamic mechanical analysis
4.1 FTIR analysis
Carbon fiber (CF) /PEEK composites are now widely used as structural materials in aerospace and aviation [1,2].
H-bond
Application of CF-PEEK composites
Problems to solve The interfacial adhesions between CF and PEEK matrix are relatively weak, thus mechanical performances of these composites prepared without surface treatments on CF are rather poor [3].
GO as an interface phase Unique shape provide high surface area. Provide functional groups and these groups change the surface free energy and wettability [4].
2. Objective
4.2 surface energies Table 1. Surface Energies of CFs Carbon Contact angle d p γ γ γ fiber (˚) (mJm-2) (mJm-2) (mJm-2) Water
CF-PEI CF-PEIGO
86.1 76.5
glycerol 99.3 91.2
1.93 2.10
40.66 52.73
42.59 54.83
4.3 Morphology of fracture surfaces
Modification of interfacial adhesions of CF /PEEK composite by graphene oxide (GO) dispersed in Polyetherimide (PE) as interface phase.
4. Conclusions & Future work
3. Materials &methods 3.1 Materials
Carbon fiber (CF) Polyetheretherketone (PEEK) Graphene oxide (GO) Polyetherimide (PE)
3.2 Methods
Higher storage modulus of modified CF, suggesting that the use of GO could achieve efficient interface adhesion between these composites. Tg is increased, thus attributing that there is strong interfacial adhesion between CF and PEEK after modification
The coating CF with PEI/GO could achieve efficient interface between CF and PEEK due to wettability and excellent miscibility between PEI and PEEK. These methods are quite easy to handle and show potentials in their industrial applications. Uncoated CF CF-coated PEI-GO Further studies are required using different nano material to improve interface of SEM observations showed that CF was CF/PEEK covered with PEEK matrix and the boundary gaps disappeared, indicating efficient modifications on the adhesion between CF [1] Giraud I et al, Journal of Appl Polym Sci, 2015, 132, 42550. and PEEK.
5. References
4.4 interlaminar shear strength (ILSS)
[2] Yapıcı. U et al, Appl Mechan Mater, 2014, 598 , 66-72. [3] Takei H et al, Mater Trans , 2011 52, 734-739. [4] Zhang X et al, ACS Appl Mater Interfaces, 2012, 4, 1543-1552
6. Acknowledgments Hot press
Scheme of surface modification of carbon fibers procedures and preparation of composite sheet.
This project is supported by National Natural Science Foundation of China (No. 21404023), funding from State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, Donghua University (No. LK1417) and the Fundamental Research Funds for the Central Universities (2232015D-10).
