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Mechanical Properties of the Carbon Nanotube Modified Epoxy–Carbon Fiber Unidirectional Prepreg Laminates

Title data

Bakis, Gökhan ; Wendel, Jan-Felix ; Zeiler, Rico ; Aksit, Alper ; Häublein, Markus ; Demleitner, Martin ; Benra, Jan ; Forero, Stefan ; Schütz, Walter ; Altstädt, Volker:
Mechanical Properties of the Carbon Nanotube Modified Epoxy–Carbon Fiber Unidirectional Prepreg Laminates.
In: Polymers. Vol. 13 (2021) Issue 5 . - No. 770.
ISSN 2073-4360
DOI: https://doi.org/10.3390/polym13050770

Project information

Project title:
Project's official titleProject's id
No informationKF 2481011AG3

Project financing: Bundesministerium für Wirtschaft und Energie

Abstract in another language

The effect of plasma treatment of the multi-walled carbon nanotube (MWCNT) surface on the fracture toughness of an aerospace grade epoxy resin and its unidirectional (UD) carbon fiber prepreg laminates has attracted scientific interest. A prepreg route eliminates the possible risk of carbon nanotube filtration by unidirectional carbon fibers. X-ray photoelectron spectroscopy results suggested that oxygen atom concentration at the nanotube surface was increased from 0.9 to 3.7 after plasma modification of the carbon nanotubes. A low number (up to 0.5 wt.) of MWCNTs was added to epoxy resin and their carbon fiber prepreg laminates. Transmission electron micrographs revealed that the plasma treatment resulted in a better dispersion and distribution of MWCNTs in the epoxy resin. Plasma-treated MWCNTs resulted in a more pronounced resistance to the crack propagation of epoxy resin. During the production of the reference and nanotube-modified prepregs, a comparable prepreg quality was achieved. Neat nanotubes agglomerated strongly in the resin-rich regions of laminates lowering the interlaminar fracture toughness under mode I and mode II loading. However, plasma-treated nanotubes were found mostly as single particles in the resin-rich regions of laminates promoting higher energy dissipation during crack propagation via a CNT pull-out mechanism.

Further data

Item Type: Article in a journal
Refereed: Yes
Keywords: carbon nanotubes; epoxy resins; carbon fibers; nanocomposites; prepregs; fiber-reinforced composites; toughness; mechanical properties; aerospace
Institutions of the University: Faculties > Faculty of Engineering Science > Former Professors > Chair Polymer Materials - Univ.-Prof. Dr.-Ing. Volker Altstädt
Faculties
Faculties > Faculty of Engineering Science
Faculties > Faculty of Engineering Science > Former Professors
Result of work at the UBT: Yes
DDC Subjects: 600 Technology, medicine, applied sciences > 620 Engineering
Date Deposited: 10 Nov 2021 10:56
Last Modified: 11 Nov 2021 07:05
URI: https://eref.uni-bayreuth.de/id/eprint/67723