Effects of thermoplastic coating on interfacial interactions in advanced engineering composites for aerospace applications

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buir.contributor.authorYavuz, Zelal
buir.contributor.authorKhaligh, Aisan
buir.contributor.authorDönüş, Tuncel
buir.contributor.orcidYavuz, Zelal|0000-0002-2277-0861
buir.contributor.orcidKhaligh, Aisan|0000-0002-5419-1020
buir.contributor.orcidTuncel, Dönüş|0000-0001-7762-9200
dc.citation.epage2245en_US
dc.citation.spage2223
dc.citation.volumeNumber81
dc.contributor.authorYavuz, Zelal
dc.contributor.authorKhaligh, Aisan
dc.contributor.authorÖz, Y.
dc.contributor.authorTuncel, Dönüş
dc.date.accessioned2024-03-07T06:27:01Z
dc.date.available2024-03-07T06:27:01Z
dc.date.issued2023-05-03
dc.departmentInstitute of Materials Science and Nanotechnology (UNAM)
dc.departmentDepartment of Chemistryen_US
dc.description.abstractDelamination due to an inferior adhesion between reinforcement material and matrix in carbon fiber-reinforced thermoplastic (CFRTP) composites is a crucial problem to be solved. To this end, this study aims to overcome poor wettability between reinforcing phase, i.e., carbon fiber (CF), and thermoplastic matrix, i.e., polyetherether ketone (PEEK). Herein, CF’s surface was tailored by application of different polymeric sizing agents which have different chemical structures. Morphology and topology analyses were performed by Scanning Electron Microscope and 3D laser scanning, respectively. Later, a variety of wettability results were obtained by the sessile drop method used in Contact Angle (CA) measurements for CFs throughout application of each sizing agent applied by dip coating. Sizing materials were designed such that the chemical structure of CF’s surface could exhibit compatibility with the matrix itself. Consequently, complete wettability (CA: 0°) was achieved for CFs sized by HPEEK (CF/hydroxylated PEEK (HPEEK)) and the surface free energy (SFE) of CF was enhanced from 5.43 to 72.8 mJ/m2 while the SFE of the PEEK matrix is 40.1 mJ/m2. Moreover, sizing by HPEEK improved the average surface roughness of CF by 32% which enables optimized adhesion. Afterward, repetitive tensile tests were carried out to observe effects of improved interfacial interlocking on the mechanical properties of the final CFRTP composite. Stress–strain curves revealed that the tensile strength of CFRTP improved from 473 to 508 MPa through the sizing of CF by HPEEK whereas pristine PEEK has a much smaller tensile strength (98 MPa) than the aforementioned CF-reinforced composites.
dc.identifier.doi10.1007/s00289-023-04807-4
dc.identifier.eissn1436-2449
dc.identifier.issn0170-0839
dc.identifier.urihttps://hdl.handle.net/11693/114372
dc.language.isoen_US
dc.relation.isversionofhttps://dx.doi.org/10.1007/s00289-023-04807-4
dc.rightsCC BY 4.0 DEED (Attribution 4.0 International)
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/
dc.source.titlePolymer Bulletin
dc.subjectAerospace applications
dc.subjectCarbon fibers
dc.subjectDelamination
dc.subjectPolyether ether ketone
dc.subjectSizing
dc.subjectSurface roughness
dc.subjectTensile strength
dc.subjectThermoplastic composites
dc.subjectWettability
dc.titleEffects of thermoplastic coating on interfacial interactions in advanced engineering composites for aerospace applications
dc.typeArticle

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Institute of Materials Science and Nanotechnology (UNAM)
Department of Chemistry