Surface Defects Repairing by Polymer Coating with Low Fraction of Nano-Reinforcements

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Abstract:

Surface defects cause the measured tensile strength of glass and other brittle materials significantly lower than their theoretical values. Here, we describe an on-line process to ‘heal’ surface flaws and functionalise surface properties. A nanometer-scale hybrid coating layer based on styrene-butadiene copolymer with mutiwalled carbon nanotubes (MWCNTs) and/or nanoclays, as mechanical enhancement and environmental barrier layer, is applied to alkali-resistant glass fibres (ARG). The nanostructured and functionalised traditional glass fibres with low fraction of nanotubes or nanoclay (1 wt% in sizing) show significant improvement in both mechanical properties and environmental corrosion resistance. We introduce a healing efficiency factor and conclude that the coating modulus, thickness and roughness are responsible for the mechanical improvement of fibres. Furthermore, we show that the hybrid coating layer is essential for enhanced interfacial adhesion strength of the glass fibre reinforced cement composites.

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Periodical:

Key Engineering Materials (Volumes 334-335)

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757-760

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March 2007

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© 2007 Trans Tech Publications Ltd. All Rights Reserved

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[1] S.L. Gao, E. Mäder, A. Abdkader and P. Offermann: Langmuir 19 (2003), p.2496.

Google Scholar

[2] L.M. Ericson, H. Fan, H. Peng, V.A. Davis, W. Zhou, J. Sulpizio, Y. Wang, R. Booker, J. Vavro, C. Guthy, A.N.G. Parra-Vasquez, M.J. Kim, S. Ramesh, R.K. Saini, C. Kittrell, G. Lavin, H. Schmidt, W.W. Adams, W.E. Billups, M. Pasquali, W.F. Hwang, R.H. Hauge, J.E. Fischer and R.E. Smalley: Science 305 (2004).

DOI: 10.1126/science.1101398

Google Scholar

[3] S.L. Gao, E. Mäder and R. Plonka: Acta Materialia 52 (2004), p.4745.

Google Scholar

[4] S.L. Gao, E. Mäder and R. Plonka: Proc. of Nanotech 2006 Conf., CD-ROM, Vol. 1, page 871. ISBN: 0-9767985-9-X, Boston, USA, (May, 2006).

Google Scholar

[5] B.R. Lawn, in: Fracture of Brittle Solids. 2nd edn, Cambridge Univ. Press: Cambridge (1993).

Google Scholar