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The influence of MXenes on the mechanical, antistatic, and heat-resistant properties of CF/PI composites

Li Jian
Li Jian
   | 04. Apr. 2022
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Online veröffentlicht: 04. Apr. 2022
Seitenbereich: 507 - 516
Eingereicht: 26. Juli 2021
Akzeptiert: 02. Feb. 2022
DOI: https://doi.org/10.2478/msp-2021-0043
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© 2021 Li Jian et al., published by Sciendo
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Fig. 1

Preparation process of CF/PI composites by heat treatment. CF, carbon fiber; PI, polyimide
Preparation process of CF/PI composites by heat treatment. CF, carbon fiber; PI, polyimide

Fig. 2

The variations of temperature and pressure with time
The variations of temperature and pressure with time

Fig. 3

The effect of CF mass fraction on the surface resistivity of CF/PI and O3-treated CF/PI composites. CF, carbon fiber; PI, polyimide. The error bars represent 5% standard deviation
The effect of CF mass fraction on the surface resistivity of CF/PI and O3-treated CF/PI composites. CF, carbon fiber; PI, polyimide. The error bars represent 5% standard deviation

Fig. 4

FTIR spectrum of CF and O3-treated CF: (A) CF; (B) O3-treated CF. CF, carbon fiber; FTIR, Fourier-transform infrared
FTIR spectrum of CF and O3-treated CF: (A) CF; (B) O3-treated CF. CF, carbon fiber; FTIR, Fourier-transform infrared

Fig. 5

SEM photos of (A) CF/PI and (B) O3-treated CF/PI composites. CF, carbon fiber; PI, polyimide; SEM, scanning electron microscopy
SEM photos of (A) CF/PI and (B) O3-treated CF/PI composites. CF, carbon fiber; PI, polyimide; SEM, scanning electron microscopy

Fig. 6

The effect of CF mass fraction on the tensile strength of CF/PI and O3-treated CF/PI composites. CF, carbon fiber; PI, polyimide. The error bars represent 5% standard deviation
The effect of CF mass fraction on the tensile strength of CF/PI and O3-treated CF/PI composites. CF, carbon fiber; PI, polyimide. The error bars represent 5% standard deviation

Fig. 7

The effect of CF mass fraction on the impact strength of CF/PI and O3-treated CF/PI composites. CF, carbon fiber; PI, polyimide. The error bars represent 5% standard deviation
The effect of CF mass fraction on the impact strength of CF/PI and O3-treated CF/PI composites. CF, carbon fiber; PI, polyimide. The error bars represent 5% standard deviation

Fig. 8

The SEM image of the CF/PI composite when the CF mass fraction is 15%. CF, carbon fiber; PI, polyimide; SEM, scanning electron microscopy
The SEM image of the CF/PI composite when the CF mass fraction is 15%. CF, carbon fiber; PI, polyimide; SEM, scanning electron microscopy

Fig. 9

The effect of MXene content on the surface resistivity of CF/MXene/PI composites. CF, carbon fiber; PI, polyimide. The error bars represent 5% standard deviation
The effect of MXene content on the surface resistivity of CF/MXene/PI composites. CF, carbon fiber; PI, polyimide. The error bars represent 5% standard deviation

Fig. 10

The effect of MXene mass fraction on the thermal conductivity of CF/MXene/PI composites. CF, carbon fiber; PI, polyimide. The error bars represent 5% standard deviation
The effect of MXene mass fraction on the thermal conductivity of CF/MXene/PI composites. CF, carbon fiber; PI, polyimide. The error bars represent 5% standard deviation

Fig. 11

The effect of MXene mass fraction on the tensile strength and impact strength of CF/MXene/PI composites. CF, carbon fiber; PI, polyimide. The error bars represent 5% standard deviation
The effect of MXene mass fraction on the tensile strength and impact strength of CF/MXene/PI composites. CF, carbon fiber; PI, polyimide. The error bars represent 5% standard deviation

Fig. 12

The effect of heat treatment on the tensile strength and impact strength of CF/MXene/PI composites. CF, carbon fiber; PI, polyimide. The error bars represent 5% standard deviation
The effect of heat treatment on the tensile strength and impact strength of CF/MXene/PI composites. CF, carbon fiber; PI, polyimide. The error bars represent 5% standard deviation

Main properties of PI (GCTPTM)

Density (kg/m3) 1,350
Impact strength (kJ/m2) 25
Tensile Strength (MPa) 95
Thermal expansion coefficient (°C−1) 4.8 × 10−5
Elongation at break (%) 7
Tg (°C) 260
Flexural strength (MPa) 150
Thermal decomposition temperature (°C) 240

Surface roughness results by AFM

Type Surface roughness (nm)
CF 30.7
O3-treated CF 42.9
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