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Volume 14
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10.3390/coatings14010027
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Article

Surface Modification of Nano-Al2O3 with Silane Coupling Agent and Its Effect on the Compressive Strength of PI/Al2O3 Composites

by
Jing Cao
1,†,
Yu Wang
1,†,
Guanghua Liu
2,
Qingyuan Shang
1,
Bicheng Wang
1,
Jian Sun
2,
Yu Bai
1,*,
Ming Liu
3,
Fangli Yu
4,*,
Guozheng Ma
3 and
Haidong Wang
3
1
State Key Laboratory for Mechanical Behavior of Materials, Xi’an Jiaotong University, Xi’an 710049, China
2
China United Gas Turbine Technology Co., Ltd., Beijing 102209, China
3
National Key Lab for Remanufacturing, Army Academy of Armored Forces, Beijing 100072, China
4
School of Materials Engineering, Xi’an Aeronautical University, Xi’an 710077, China
*
Authors to whom correspondence should be addressed.
†
These authors contributed equally to this work.
Coatings 2024, 14(1), 27; https://doi.org/10.3390/coatings14010027
Submission received: 28 November 2023 / Revised: 20 December 2023 / Accepted: 20 December 2023 / Published: 25 December 2023
(This article belongs to the Special Issue New Advances in Ceramic Coatings and Its Applications)
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Abstract

In this study, a series of nano-Al2O3 reinforced polyimide (PI) composites were fabricated using the hot compression method. A silane coupling agent was used to modify the surface of nano-Al2O3 powder to enhance the PI/Al2O3 interface compatibility. The effects of Al2O3 contents on the microstructures, thermal behavior and mechanical properties of PI/Al2O3 composites were investigated. The results suggested that chemical reactions occurred during in situ modification. The nano-Al2O3 was cross-linked to the PI matrix, which reduced the mobility of PI chains and improved the elastic modulus of the composites. When the Al2O3 content was 30 wt.%, the compressive strength of composites reached the maximum value of 313 MPa and increased by 26.5% than that of the PI matrix.
Keywords: polyimide; Al2O3; composite; surface modification; compressive strength polyimide; Al2O3; composite; surface modification; compressive strength

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MDPI and ACS Style

Cao, J.; Wang, Y.; Liu, G.; Shang, Q.; Wang, B.; Sun, J.; Bai, Y.; Liu, M.; Yu, F.; Ma, G.; et al. Surface Modification of Nano-Al2O3 with Silane Coupling Agent and Its Effect on the Compressive Strength of PI/Al2O3 Composites. Coatings 2024, 14, 27. https://doi.org/10.3390/coatings14010027

AMA Style

Cao J, Wang Y, Liu G, Shang Q, Wang B, Sun J, Bai Y, Liu M, Yu F, Ma G, et al. Surface Modification of Nano-Al2O3 with Silane Coupling Agent and Its Effect on the Compressive Strength of PI/Al2O3 Composites. Coatings. 2024; 14(1):27. https://doi.org/10.3390/coatings14010027

Chicago/Turabian Style

Cao, Jing, Yu Wang, Guanghua Liu, Qingyuan Shang, Bicheng Wang, Jian Sun, Yu Bai, Ming Liu, Fangli Yu, Guozheng Ma, and et al. 2024. "Surface Modification of Nano-Al2O3 with Silane Coupling Agent and Its Effect on the Compressive Strength of PI/Al2O3 Composites" Coatings 14, no. 1: 27. https://doi.org/10.3390/coatings14010027

APA Style

Cao, J., Wang, Y., Liu, G., Shang, Q., Wang, B., Sun, J., Bai, Y., Liu, M., Yu, F., Ma, G., & Wang, H. (2024). Surface Modification of Nano-Al2O3 with Silane Coupling Agent and Its Effect on the Compressive Strength of PI/Al2O3 Composites. Coatings, 14(1), 27. https://doi.org/10.3390/coatings14010027

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