One-pot strategy for covalent construction of POSS-modified silane layer on carbon fiber to enhance interfacial properties and anti-hydrothermal aging behaviors of PPBES composites

In this study, we describe a novel strategy to design and construct POSS-modified silane layer on carbon fiber (CF) to strengthen the interfacial adhesion and anti-hydrothermal aging behaviors of CF-reinforced copoly(phthalazinone ether sulfone)s (PPBES). POSS was first modified by 3-aminopropyltrie...

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Bibliographic Details
Published in:Journal of materials science 2018-12, Vol.53 (24), p.16303-16317
Main Authors: Li, Nan, Wu, Zuoqiang, Yang, Xiuxiu, Wang, Chenghao, Zong, Lishuai, Pan, Yunxing, Wang, Jinyan, Jian, Xigao
Format: Article
Language:English
Subjects:
Aminopropyltriethoxysilane
Carbon fibers
Characterization and Evaluation of Materials
Chemical bonds
Chemical properties
Chemistry and Materials Science
Classical Mechanics
Composite materials
Composites
Contact angle
Crystallography and Scattering Methods
Design modifications
Failure mechanisms
Interfacial properties
Interfacial shear strength
Materials Science
Organic chemistry
Polymer Sciences
Shear strength
Silanes
Solid Mechanics
Strategy
Ultrasonic testing
Wettability
Wetting
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Summary:In this study, we describe a novel strategy to design and construct POSS-modified silane layer on carbon fiber (CF) to strengthen the interfacial adhesion and anti-hydrothermal aging behaviors of CF-reinforced copoly(phthalazinone ether sulfone)s (PPBES). POSS was first modified by 3-aminopropyltriethoxysilane (APS) to improve chemical reactivity. Without separation and purification, APS-c-POSS was used to functionalize CF to improve reactivity and ensure the covalent linkages between CF and POSS-modified silane layer. CF coated with POSS-modified silane layer was obtained by in situ hydrolysis of APS-c-POSS. FTIR and XPS confirmed the chemical bonds between CF and POSS-modified silane layer. Dynamic contact angle, dynamic wetting test and AFM tests demonstrated that POSS-modified silane coating can increase the wettability and roughness, which could improve interlaminar shear strength and flexural strength of CF/PPBES composites by 17.5 and 30.0% with slight enhancement on tensile strength of CF. The failure mechanisms of CF/PPBES composites with and without POSS-modified silane layer were both investigated by SEM in detail. Moreover, this layer was helpful to dynamic mechanical property and hydrothermal resistance of CF/PPBES composites. This study provides alternate strategy to modify CF with POSS, which will significantly broaden the application field of POSS in advanced composites.
ISSN:0022-2461
1573-4803
DOI:10.1007/s10853-018-2704-7