TY - JOUR
T1 - Examining interfacial interactions in a range of polymers using poly(ethylene oxide) functionalized carbon fibers
AU - Eyckens, D.J.
AU - Randall, J.D.
AU - Stojcevski, F.
AU - Sarlin, E.
AU - Palola, Sarianna
AU - Kakkonen, M.
AU - Scheffler, C.
AU - Henderson, L.C.
N1 - Funding Information:
The authors gratefully acknowledge Deakin University , this research was conducted with support from the Australian Research Council World Class Future Fiber Industry Transformation Research Hub ( IH140100018 ) and the ARC Training Centre for Lightweight Automotive Structures ( IC160100032 ), Discovery project ( DP180100094 ), partially supported by the Office of Naval Research ( N62909-18-1-2024 ). The authors also thank the Carbon Nexus Production Facility for providing fibers. This work was performed in part at the Deakin Hub in the Victorian Node of the Australian National Fabrication Facility (ANFF).
Publisher Copyright:
© 2020 Elsevier Ltd
PY - 2020/11
Y1 - 2020/11
N2 - It is commonly assumed that a higher oxygenated content on the surface of carbon fibers will lead to high interfacial adhesion. Thus, carbon fibers are exposed to oxidizing treatments to increase surface polarity. Here, we examine the interfacial interactions of a range of thermoset and thermoplastic polymers with carbon fibers that have a grafted polyethylene oxide (PEO) chains to their surface. This provides an extremely hydrophilic surface, without potential degradation of the fiber via chemical oxidation. We find that high surface polarity does not always correlate to high interfacial adhesion; in some instances, unsized hydrophobic carbon fibers possess equal or better fiber-to-matrix adhesion than treated hydrophilic carbon fibers. The most notable example is in vinyl ester resin, in which the presence of an alkyne group, able to participate in the radical polymerization process, provides significant improvements in interfacial shear strength (IFSS) compared to a larger, and polar, PEO chain.
AB - It is commonly assumed that a higher oxygenated content on the surface of carbon fibers will lead to high interfacial adhesion. Thus, carbon fibers are exposed to oxidizing treatments to increase surface polarity. Here, we examine the interfacial interactions of a range of thermoset and thermoplastic polymers with carbon fibers that have a grafted polyethylene oxide (PEO) chains to their surface. This provides an extremely hydrophilic surface, without potential degradation of the fiber via chemical oxidation. We find that high surface polarity does not always correlate to high interfacial adhesion; in some instances, unsized hydrophobic carbon fibers possess equal or better fiber-to-matrix adhesion than treated hydrophilic carbon fibers. The most notable example is in vinyl ester resin, in which the presence of an alkyne group, able to participate in the radical polymerization process, provides significant improvements in interfacial shear strength (IFSS) compared to a larger, and polar, PEO chain.
KW - A. Carbon fibres
KW - B. Adhesion
KW - B. Fibre/matrix bond
KW - C. Micromechanics
UR - http://www.scopus.com/inward/record.url?scp=85089135125&partnerID=8YFLogxK
U2 - 10.1016/j.compositesa.2020.106053
DO - 10.1016/j.compositesa.2020.106053
M3 - Article
SN - 1359-835X
VL - 138
JO - Composites Part A: Applied Science and Manufacturing
JF - Composites Part A: Applied Science and Manufacturing
M1 - 106053
ER -