Manufacturing Technology 2024, 24(4):521-531 | DOI: 10.21062/mft.2024.058

Effect of Filler Content and Treatment on Mechanical Properties of Polyamide Composites Reinforced with Short Carbon Fibres Grafted with Nano-SiO₂

Dana Bako¹ová ORCID..., Al¾beta Bako¹ová ORCID..., Petra Dubcová ORCID..., Daniela Ko¹tialiková ORCID..., Andrej Dubec ORCID..., Mariana Janeková ORCID...
Faculty of Industrial Technologies in Púchov, Alexander Dubèek University of Trenèín. I. Krasku 491/30, 020 01 Púchov. Slovakia

The polyamide PA6 composites reinforced with carbon fibres (CF) are widely studied due to their properties and their high strength to weight ratio. Good adhesion between a filler and a matrix is es-sential for enhancing properties of a resulting composite. This study investigates the effect of the short CF content and the used CF treatment on mechanical properties of the PA6-CF composites. The composites were subjected to tensile, flexural, compression, hardness and Charpy tests as well as dynamical mechanical analysis. An atomic force microscopy was employed to investigate topography of the CF and the composites. Initially, the properties of the composites were improved through the oxidation of the CF in HNO₃. Subsequently, to further enhance these properties, the oxidized CF were grafted with nano-SiO₂. The CF content in the tested composites varied from 10 wt% to 60 wt%. The most significant improvement of the tested properties was observed at the CF content of 40 wt%.

Keywords: Polyamide composites, Carbon Fibres, Nano-silica, Fibre surface treatment, Mechanical properties
Grants and funding:

This research work was supported by the Operational Programme Integrated Infrastructure and cofinanced by the European Regional Development Fund through the Advancement and Support of Research and Development project for the “Centre for diagnostics and quality testing of materials” in the RIS3 SK specialization domain (acronym: CEDITEK II., ITMS2014+ code 313011W442.  This research work was also created within the project „The use of the MATLAB program in the processing of experimental scientific data in materials research“, code of project MVP01_2024, based on the financial support from the European Union within the call Early Stage Grants of the Recovery and Resilience Facility (Code of the project: 09I03-03-V05-00010, Component 9: More effective management and strengthening of research, development and innovation funding), and with the financial support of the Internal Grant Scheme of the Alexander Dubèek University of Trenèín

Received: February 23, 2024; Revised: June 12, 2024; Accepted: June 17, 2024; Prepublished online: August 2, 2024; Published: September 1, 2024  Show citation

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Bako¹ová D, Bako¹ová A, Dubcová P, Ko¹tialiková D, Dubec A, Janeková M. Effect of Filler Content and Treatment on Mechanical Properties of Polyamide Composites Reinforced with Short Carbon Fibres Grafted with Nano-SiO₂. Manufacturing Technology. 2024;24(4):521-531. doi: 10.21062/mft.2024.058.
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