2015
DOI: 10.1002/pen.24186
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Role of salt on adhesion of an epoxy/aluminum (oxide) interface in aqueous environments

Abstract: Joints held by polymeric adhesives are commonplace in many engineered products, but normal service can require exposure to environmental conditions that present a significant challenge for maintaining the structural integrity of the interface. In particular, aqueous environments can wreak havoc on the joint strength. Here, a mechanistic approach is used to understand the difference in the debonding behavior of an epoxy/aluminum (oxide) interface when exposed to deionized (DI) water and aqueous sodium chloride … Show more

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Cited by 8 publications
(11 citation statements)
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“…Our SFG observations of pristine aggregate glue together with results obtained for model polyacrylic acid polymer suggest the sequestration of interfacial liquid-like water by the hygroscopic LMMCs, thus explaining the cohesive failure of Larinioides cornutus aggregate glue at high humidity. Tan et al reports similar observations with synthetic adhesives, where the osmotic pressure effect of sodium chloride in water improves the adhesion underwater 50 . Thus, hygroscopic LMMCs and glycoproteins team-up in sequestering interfacial water at high humidity, thereby overcoming a fundamental limitation of conventional synthetic adhesives.…”
Section: Discussionmentioning
confidence: 56%
“…Our SFG observations of pristine aggregate glue together with results obtained for model polyacrylic acid polymer suggest the sequestration of interfacial liquid-like water by the hygroscopic LMMCs, thus explaining the cohesive failure of Larinioides cornutus aggregate glue at high humidity. Tan et al reports similar observations with synthetic adhesives, where the osmotic pressure effect of sodium chloride in water improves the adhesion underwater 50 . Thus, hygroscopic LMMCs and glycoproteins team-up in sequestering interfacial water at high humidity, thereby overcoming a fundamental limitation of conventional synthetic adhesives.…”
Section: Discussionmentioning
confidence: 56%
“…Inorganic LMMCs interact with adhesive proteins produced by marine organisms such as oysters, as well as in glycoprotein function in synovial fluids . Synthetic systems such as hydrogels, electrospun fibers, polymer brushes, membranes, and more recently adhesive joints have also been shown to alter function on the basis of interaction of LMMCs with macromolecular structures such as polymers. These studies further support the hypothesis that LMMCs in the glue interact directly with glycoproteins and the water uptake can be modulated by this interactions and the differences in water uptake between Tetragnatha and other three species could reflect the differences in the chemical composition of glycoproteins instead .…”
Section: Discussionmentioning
confidence: 99%
“…Experimental characterization of moisture uptake often focuses on the effects of moisture on polymer matrix relaxation, the extent of water molecule immobilization, and the water droplet shape in relation to the cumulative hydration level. Characterization methods include dielectric and infrared (IR) spectroscopies, positron annihilation, nuclear magnetic resonance reflectometry, neutron reflectivity, , and fluorogenic dye sensors among other modalities, each having specific strengths and limitations. For example, methods based on neutron reflectivity are capable of assessing the size of the interfacial zone in the direction transverse of the substrate to within several angstroms, yet such scattering measurements are limited to thin polymer films supported on flat substrates with topological surface imperfections smaller than the method resolution.…”
Section: Introductionmentioning
confidence: 99%