Effect of surfactant contamination on the properties of aluminum/silicone adhesive joints

Brandão, R.; Borges, Catarina S. P.; Marques, E.A.S.; Carbas, R.J.C.; Akhavan‐Safar, A.; Nunes, P.D.P.; Ueffing, Christoph; Weißgraeber, Philipp; Schmid, Florian; Silva, Lucas F. M. da

doi:10.1080/15376494.2022.2046217

Cited by 6 publications

(3 citation statements)

References 25 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It can also be affirmed that, although the joint had mixed failure, all the adhesive was damaged by the contamination, because the value of the fracture toughness, even when cohesive failure is observed, is lower than that of the uncontaminated condition. This phenomenon was also reported by Brandão et al (Brandão et al 2022).…”

Section: Resultssupporting

confidence: 84%

“…This is important to understand because, in both scenarios, the contaminant degrades the adhesive joint and can change the path of the failure progression to the interphase area or even the interface. Brandão et al (Brandão et al 2022) analysed the same adhesive and contaminant materials used in this work, through double cantilever beam (DCB) and single lap joints (SLJ), and concluded that the increasing amount of contaminant decreased the failure load and shifted the failure from the adhesive to the adhesive close to the substrate and, ultimately, the interface. In this short paper, the effect of surface contamination of a surfactant found in detergents used to clean aluminium substrates was analysed.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Effect of Surface Contamination on the Peel Properties of Adhesive Joints

Moreira

Borges

Marques

et al. 2022

JMS

View full text Add to dashboard Cite

One of the main setbacks to the use of adhesive joints is their sensitivity to surface quality and preparation, with high strength decreases being reported for contaminated surfaces. This contamination effect can arise from surfactants used to clean lubricants used during substrate machining, which can remain on the bonding area. In this paper, the effect of surfactant contamination on joints with aluminium substrates and a silicone adhesive was studied using a peel test. It was concluded that as the level of contamination applied to the substrate increases, the peel strength of the joint decreases and failure is progressively interfacial. Numerical models were developed to reproduce the experimental results.

show abstract

Section: Resultssupporting

confidence: 84%

Section: Introductionmentioning

confidence: 99%

Effect of Surface Contamination on the Peel Properties of Adhesive Joints

Moreira

Borges

Marques

et al. 2022

JMS

View full text Add to dashboard Cite

show abstract

“…As physico-chemical properties of adherend surfaces and, thus, the bond quality that results following an adhesive bonding process are affected by contaminations, procedures for intentionally applying different off-specification process scenarios were developed and their effects on joint strength and fracture surface composition after destructive testing were evaluated [7]. Focusing on different types of contaminations on adherend surfaces like surfactants, model conceptions and numerical models were elaborated to understand related phenomena and to comprehend their effects on interphase properties [8,9]. Until this day artificial fingerprint contamination or fingerprinted deposits from technical liquids are in the focus of establishing quality assurance procedures for adhesive bonding assembly, e.g.…”

Section: Introductionmentioning

confidence: 99%

Extended non-destructive testing for inline quality control of cleaning and pre-treatment processes in adhesive bonding of polymer blends

et al. 2022

View full text Add to dashboard Cite

This investigation aims to demonstrate relevant pitfalls of exemplary surface contaminations on polymer blends with respect to quality assurance (QA) of adhesive joints, and highlights approaches of Extended Non-Destructive Testing (ENDT) for tackling the challenges inline during manufacture or repair processes. Greasy fingerprints were intentionally applied on surfaces of different acrylonitrile butadiene styrene (ABS) substrates before joining them with a two component (2C) polyurethane (PU) adhesive. Even when a required cleaning process was omitted before performing a pre-treatment with atmospheric-pressure plasma (APP), measured initial strengths of unaged joints did not reveal significant differences, if compared to joints produced following the qualified bonding process, which comprises a wipe-off wet cleaning before the pre-treatment step. However, after accelerated ageing mimicking the application conditions for joints, resulting strengths were more than 30% lower than for joints produced with the qualified bonding process. Thus, applying post-process random inspection of as-manufactured joints based on destructive testing, and merely evaluating initial joint strengths is not sufficient for assuring the reliability of such manufactured joints. Rather, it is recommended to encompass the intended or specified use within the formulation of the quality requirements. Introducing in-process ENDT procedures, and exemplarily monitoring the substrate surfaces with an Aerosol Wetting Test (AWT), is shown to identify latent fingerprints and to ensure a rapid and documented way to validate adherend surface quality before the application of the adhesive.Article Highlights Surface quality assurance leads the way for process management decisions to safeguard relevant adherend properties before applying adhesive. Using an Aerosol Wetting Test for plastic adherends allows for identifying latent fingerprints that would impair joint strength. Extended Non-Destructive Testing facilitates embracing potential in-process contaminations when scheduling cleaning processes for adherends.

show abstract

Comparative fracture surface analysis of adhesively bonded dissimilar lap joints: Nanosilica effect

Dizaji,

Khabaz‐Aghdam,

Kandemir

2024

Polymer Composites

View full text Add to dashboard Cite

This research presents a comparative analysis of the fracture surfaces of adhesively bonded dissimilar single lap joints (DSLJs) and investigates the effect of nanosilica (NS) additives on their fracture behavior and performance. The study focuses on DSLJs composed of aluminum (Al), stainless steel (SS), copper (Cu), and carbon fiber reinforced polymer (CFRP) adherends bonded with an epoxy adhesive. The fracture surface of DSLJs is further analyzed by introducing two parameters: fractional total fracture area (aT) and the surface sensitivity of each adherend (aSurface). These parameters serve as benchmarks to predict the final load capacity of the adhesive joints. It is found that a decrease in and an increase in the sensitivity of the adherend with a lower Young's modulus lead to higher load capacity. Tensile tests revealed that incorporating NS up to a critical weight percentage of 0.6 wt% improves the proposed surface parameters and significantly contributes to higher levels of load capacity and absorbing greater amounts of energy to failure. Furthermore, numerical simulations offer insights into stress distribution and the mechanism of plastic deformation propagation, providing additional support for the experimental findings.Highlights NS up to 0.6 wt% enhances the mechanical properties of DSLJs. NS–epoxy interactions characterized through Fourier transform infrared and transmission electron microscopy analysis. Fracture surface patterns help to predict the final load capacity of DSLJs. Plastic propagation in epoxy verifies fracture surface pattern in DSLJs.

show abstract

Effect of surfactant contamination on the properties of aluminum/silicone adhesive joints

Cited by 6 publications

References 25 publications

Effect of Surface Contamination on the Peel Properties of Adhesive Joints

Effect of Surface Contamination on the Peel Properties of Adhesive Joints

Extended non-destructive testing for inline quality control of cleaning and pre-treatment processes in adhesive bonding of polymer blends

Comparative fracture surface analysis of adhesively bonded dissimilar lap joints: Nanosilica effect

Contact Info

Product

Resources

About