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Proceedings Paper

Effect of surface modification on the interfacial bonding of optical fiber with inorganic and organic matrices
Author(s): Pieter L. Swart; Lin Tu; Anatoli A. Chtcherbakov
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Paper Abstract

We examine the effect of fiber surface oxyfluorination on the interfacial bonding between acrylic coated optical fiber and a cementitious matrix and polyester resin respectively. In this investigation, the optical fiber is surface oxyfluorinated through a gas reaction process at room temperature in which elemental oxygen and fluorine are introduced into the acrylic molecular chain to replace the hydrogen atoms partially. After surface fluorination, the wettability of the optical fiber improves. The surface of the unmodified and the surface oxyfluorinated optical fiber were observed by scanning electron microscopy. Through an optical fiber embedment pull-out test, it is found that the surface oxyfluorination treatment improves the adhesional shear bond strength between the optical fiber and the cementitious matrix by 22%. It is also found that this surface treatment improves the interfacial bonding between the optical fiber and the polyester resin matrix by 67%. The debonding of the unmodified optical fiber and the polyester matrix exhibits catastrophic failure characteristics, whereas that of the oxyfluorinated optical fiber with the polyester matrix is more gradual and there is still a substantial bond at the interface after the interfacial adhesive bond is broken. The mechanisms for the increase in interfacial bonding between the oxyfluorinated acrylic coated optical fiber and the cementitious and polyester resin matrices are proposed.

Paper Details

Date Published: 31 May 1999
PDF: 8 pages
Proc. SPIE 3670, Smart Structures and Materials 1999: Sensory Phenomena and Measurement Instrumentation for Smart Structures and Materials, (31 May 1999); doi: 10.1117/12.349734
Show Author Affiliations
Pieter L. Swart, Rand Afrikaans Univ. (South Africa)
Lin Tu, Rand Afrikaans Univ. (South Africa)
Anatoli A. Chtcherbakov, Rand Afrikaans Univ. (South Africa)


Published in SPIE Proceedings Vol. 3670:
Smart Structures and Materials 1999: Sensory Phenomena and Measurement Instrumentation for Smart Structures and Materials
Richard O. Claus; William B. Spillman, Editor(s)

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