Effect of surface treatments on the durability of green polyurethane adhesive bonded aluminium alloy

Norazwani Muhammad Zain, Sahrim Ahmad, Ernie Suzana Ali

Research output: Contribution to journalArticle

22 Citations (Scopus)

Abstract

Surface treatment of aluminium alloy plays a significant role in improving the strength of the adhesive bond. In this study, an aluminium alloy 2024-T3 was treated by two different methods of surface treatments i.e. by alkaline etching and warm water treatment followed by silanization method in order to enhance the adhesive bonding. Three different formulations of polyurethane adhesive by varying the NCO:OH ratios which were prepared from polyol polycaprolactone (PCL) based on palm kernel oil polyesteramide (PPKO) with a blend of aromatic and cycloaliphatic diisocyanate. Surface morphology, surface chemical analysis, wettability and surface roughness of the treated samples were characterised using field emission scanning electron microscopy and energy dispersive X-ray analysis (FESEM/EDX), X-Ray Photoelectron Spectroscopy (XPS), contact angle goniometry and surface profilometry, respectively. The influences of surface treatment techniques and conditions on durability of the joint strength and interfacial properties were explored by performing the single lap shear test and wedge test. The effects of NCO:OH ratios on PU adhesive strength were also investigated. Durability of PU adhesive bonding is found to display an interesting dependence on the surface treatments.

Original languageEnglish
Pages (from-to)43-55
Number of pages13
JournalInternational Journal of Adhesion and Adhesives
Volume55
DOIs
Publication statusPublished - 2014

Fingerprint

Polyurethanes
Surface treatment
Aluminum alloys
Adhesives
Durability
Polycaprolactone
Profilometry
Palm oil
Energy dispersive X ray analysis
Polyols
Water treatment
Field emission
Contact angle
Surface morphology
Wetting
Etching
X ray photoelectron spectroscopy
Surface roughness
Scanning electron microscopy
Chemical analysis

Keywords

  • Lap-shear
  • Surface roughness
  • Surface treatment
  • Wedge test
  • Wettability

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Biomaterials
  • Polymers and Plastics

Cite this

Effect of surface treatments on the durability of green polyurethane adhesive bonded aluminium alloy. / Zain, Norazwani Muhammad; Ahmad, Sahrim; Ali, Ernie Suzana.

In: International Journal of Adhesion and Adhesives, Vol. 55, 2014, p. 43-55.

Research output: Contribution to journalArticle

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