Establishment of Silane/GO Multistage Hybrid Interface Layer to Improve Interfacial and Mechanical Properties of Carbon Fiber Reinforced Poly (phthalazinone ether ketone) Thermoplastic Composites

Shan Cheng; Nan Li; Yuxi Pan; Bing Wang; Haoyue Hao; Fangyuan Hu; Cheng Liu; Yousi Chen; Xigao Jian

doi:10.3390/ma15010206

Establishment of Silane/GO Multistage Hybrid Interface Layer to Improve Interfacial and Mechanical Properties of Carbon Fiber Reinforced Poly (phthalazinone ether ketone) Thermoplastic Composites

Materials (Basel). 2021 Dec 28;15(1):206. doi: 10.3390/ma15010206.

Authors

Shan Cheng^{1

2

3}, Nan Li^{1

3

4}, Yuxi Pan^{1

3}, Bing Wang^{1

2

3}, Haoyue Hao^{1

2

3}, Fangyuan Hu^{1

2

3}, Cheng Liu^{1

3}, Yousi Chen^{1

3}, Xigao Jian^{1

2

3}

Affiliations

¹ State Key Laboratory of Fine Chemicals, Department of Polymer Science and Materials, School of Chemical Engineering, Dalian University of Technology, Dalian 116024, China.
² School of Materials Science and Engineering, Dalian University of Technology, Dalian 116024, China.
³ Liaoning Province Engineering Centre of High-Performance Resins, Dalian University of Technology, Dalian 116024, China.
⁴ State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, Donghua University, Shanghai 201620, China.

Abstract

This study focused on the faint interface bonding between carbon fiber (CF) and poly(phthalazinone ether ketone) (PPEK) thermoplastic, a multistage hybrid interface layer was constructed via the condensation reaction of N-[3-(Trimethoxysilyl)propyl]-N,N,N-trimethylammonium chloride (KHN⁺) and the electrostatic adsorption of graphene oxide (GO). The influence of the contents of GO (0.2 wt%, 0.4 wt%, 0.6 wt%) on the interfacial properties of composites was explored. FTIR, Raman spectra, XPS tests indicated the successful preparation of CF-KHN⁺-GO reinforcements. The multistage hybrid interface layer significantly increased fiber surface roughness without surface microstructure destruction. Simultaneously, polarity and wettability are remarkably improved as evidenced by the dynamic contact angle experiment. The interlaminar shear strength (ILSS) and flexural strength of the CF/PPEK composites with 0.4 wt% GO (CF-KHN⁺-4GO) were 74.57 and 1508 MPa, which was 25.2% and 23.5% higher than that of untreated CF/PPEK composite, respectively. Dynamic mechanical analysis proved that CF/GO/PPEK composites have excellent high-temperature mechanical properties. This study furnishes an unsophisticated and valid strategy to build an interface transition layer with a strong binding force, which would offer a new train of thought in preparing high-performing structural composites.

Keywords: carbon fiber; graphene; interface/interphase; silane; thermoplastic composites.

Abstract

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