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Epoxy Adhesives Modified With Nano- And Micro-Particles for In-Situ Timber Bonding: Effect of Microstructure on Bond Integrity.

Ahmad Z., and Ansell, M.P. , and Smedley, D. , (2010) Epoxy Adhesives Modified With Nano- And Micro-Particles for In-Situ Timber Bonding: Effect of Microstructure on Bond Integrity. International Journal of Mechanical and Materials Engineering, 5 (1). pp. 59-67. ISSN 1823-0334

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Official URL: http://ejum.fsktm.um.edu.my/ArticleInformation.aspx?ArticleID=858

Affiliations

Universiti Technologi MARA. Faculty of Civil Engineering
University of Bath, UK
Rotafix (Northern) Limited, UK.

Abstract

The bond integrity of thixotropic, shear-thinning epoxy adhesives for in situ bonding of FRP connections into timber was investigated. The manufacture of such joints requires adhesives which can produce thick bond-line where the bonding environment does not allow any use of pressure and heat. Four adhesives were evaluated based on a standard adhesive to which nano-silica, nano-rubber and ceramic micro-particles were added to modify rheology and improve adhesive bonding. Viscosity and shear stress of the adhesives were measured as a function of shear rate. The rubber-modified formulation was found to possess the highest viscosity and required higher shear stress to reduce its viscosity. The wettability of nano-modified adhesives on timber substrates was assessed by contact angle measurements and the rubber-modified formulation possessed the highest contact angle which was expected from viscosity measurements. The shear strength of timber to adhesive interfaces was measured using block shear tests and pull-out tests on FRP rods bonded into timber. The addition of nano- and micro-filler additions increased the bond strength of the base adhesive by up to 20%. However the measured contact angle negatively correlated with measured bond strength. Overall, the less ductile micro-particle-filled adhesive delivered the highest shear strengths when bonding timber and FRP rods.

Item Type:Journal
Additional Information:The work reported here was financially supported by the Malaysian government. The provision of epoxy adhesives by Rotafix Ltd is gratefully acknowledged. We wish to thank technical staff in the materials engineering group and the Centre for Electron Optical Studies at the University of Bath for their assistance and support.
Keywords:micro- and nano-particle-reinforcements, shear strength, wettability, thixotropy.
Subjects:T Technology, Engineering
ID Code:11799

Achary, P.S., Gouri, C., and Ramamurty, R., 1991. Carboxyl-Terminated Poly(Propylene Glycol) Adipate-modified room temperature curing epoxy adhesive for elevated temperature service environment, Journal Applied Polymer Science, Vol. 42, pp. 743 – 752.

Ahmad Z., Ansell, M.P. and Smedly D., 2006. Influence of nanofillers on the thermal and mechanical behaviour of DGEBA-based adhesives for bonded-in timber connections, Mechanics of Composite Material, Vol. 42, No.5, pp. 419-430.

Ansell, M.P., and Smedley, D., 2008. Bonded-in technology for structural timber, Proceedings of the Institution of Structural Engineers, Construction Materials, Vol. 160, Issue CM3, pp. 95-98.

Bascom, W. D., and Cottington, R. L., 1976. Effect of temperature on adhesive fracture behavior of an elastomer epoxy resin. Journal of Adhesion, Vol. 7, No. 4, pp. 333-346.

Broughton, J. G., and Hutchinson, A. R., 2001. Efficient timber connection using bonded-in GFRP rods, composite construction. Proceeding of International. Conference. on Composites in Construction, Figueiras, J., et al (ed.), Balkema, pp. 275-280.

Brady, D. A., and Kamke, F. A., 1988. Effects of hot-pressing parameters on resin penetration. Forest Product Journal, 38/11/12, pp.63 – 68.

Carpenter, W. C., 1991. A comparison of numerous lap joint theories for adhesively bonded joints. Journal of Adhesion, Vol. 35, pp.55 - 73.

Chandler, J. G., Brandon, R. L., and Frihart, C. R., 2005. Examination of adhesive penetration in modified wood using fluorescence microscopy. ASC Spring 2005 Convention and Exposition, April 17 – 19, Columbus, Ohio, 10.

Davis, G., 1997. The performance of adhesive systems for structural timbers. International Journal of Adhesion and Adhesives, Vol. 17, pp. 247-255.

Davis, T. J., and Claisse, P. A., 2001. Resin-injected dowel joints in glulam and structural timber composites. Construction Building Material, Vol. 15, pp. 157-167.

Feligioni, L., Lavisci, P., Duchanois, G., De Ciechi, M., and Spinelli, P., 2003, Influence of glue rheology and joint thickness on the strength of bonded-in rods. Holz Als Roh-und Werkstoff, Vol. 61, No. 4, pp. 281-287.

Harvey, K., and Ansell, M. P., 2000. Improved timber connections using bonded-in GFRP rods, Proceedings of 6th World Conference on Timber Engineering, Whitsler, British Columbia, 31st July to 3rd August 2000, Paper P04.

Huang, Y., Hunston, D. L., Kinloch, A. J., and Riew, C. K, 1993. Toughened Plastics I. Advances in Chemistry Series, 233, Riew, C. K., and Kinloch, A. J. (ed.), American Chemical Society, Washington DC.

Huntsberger, J. R., 1981, Surface-Energy, Wetting and Adhesion. Journal of Adhesion, Vol. 12, No.1, pp. 3-12.

Joseph, D. R., 1999. Flitched beams for use in domestic flooring. Final Year Research Project, Faculty of the Built Environment, University of the West of England, UK.

Kinloch, A. J., and Young, R. J., 1983. Fracture behaviour of polymers, Applied Science, London, pp. 421-471.

Madhoushi, M., Ansell, M.P., 2004. Experimental study of static and fatigue strengths of pultruded GFRP rods bonded into LVL and glulam, International Journal of Adhesion and Adhesives, Vol. 24, No. 4, pp. 319-325.

Pizzi, A., 1983. Wood adhesives: Chemistry and Technology, Vol. 1, Marcel Dekker, New York.

Pizzi, A., and Mittal, K. L., 1994. Handbook of Adhesive Technology, Marcel Dekker, New York.

Ratna, D., and Banthia, A. K., 2000. Toughened epoxy adhesive modified with acrylate based liquid rubber. Polymer International, Vol. 49, No.3, pp. 281-287.

Sernek, M. J., Resnik, J., Kamke, F. A., 1999. Penetration of liquid urea formaldehyde adhesive into beech wood. Wood and Fiber Science, Vol. 31, No.1, 41-48.

Vick, C. B., 1999. Wood handbook –Wood as an Engineering Material. Gen. Tech. Rep. FPL-GTR-113, Madison, WI: U.S. Department of Agriculture, Forest Service, Forest Products Laboratory, Chapter 9.

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