Polydopamine and Polydopamine-Silane Hybrid Surface Treatments in Structural Adhesive Applications

Numerous studies have focused on the remarkable adhesive properties of polydopamine, which can bind to substrates with a wide range of surface energies, even under aqueous conditions. This behavior suggests that polydopamine may be an attractive option as a surface treatment in structural bonding ap...

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Veröffentlicht in:Langmuir : the ACS journal of surfaces and colloids. - 1985. - 34(2018), 4 vom: 30. Jan., Seite 1274-1286
1. Verfasser: Tran, Ngon T (VerfasserIn)
Weitere Verfasser: Flanagan, David P, Orlicki, Joshua A, Lenhart, Joseph L, Proctor, Kenneth L, Knorr, Daniel B Jr
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2018
Zugriff auf das übergeordnete Werk:Langmuir : the ACS journal of surfaces and colloids
Schlagworte:Journal Article Research Support, U.S. Gov't, Non-P.H.S. Benzhydryl Compounds Epoxy Compounds Indoles Phenols Polymers Propylamines Silanes polydopamine mehr... bisphenol A diglycidyl ether F3XRM1NX4H amino-propyl-triethoxysilane L8S6UBW552 bisphenol A RW57K3X12M
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520 |a Numerous studies have focused on the remarkable adhesive properties of polydopamine, which can bind to substrates with a wide range of surface energies, even under aqueous conditions. This behavior suggests that polydopamine may be an attractive option as a surface treatment in structural bonding applications, where good bond durability is required. Here, we assessed polydopamine as a surface treatment for bonding aluminum plates with an epoxy resin. A model epoxy adhesive consisting of diglycidyl ether of bisphenol A (DGEBA) and Jeffamine D230 polyetheramine was employed, and lap shear measurements (ASTM D1002 10) were made (i) under dry conditions to examine initial bond strength and (ii) after exposure to hot/wet (63 °C in water for 14 days) conditions to assess bond durability. Surprisingly, our results showed that polydopamine alone as a surface treatment provided no benefit beyond that obtained by exposing the substrates to an alkaline solution of tris buffer used for the deposition of polydopamine. This implies that polydopamine has a potential Achilles' heel, namely, the formation of a weak boundary layer that was identified using X-ray photoelectron spectroscopy (XPS) of the fractured surfaces. In fact, for longer deposition times (2.5 and 18 h), the tris buffer-treated surface outperformed the polydopamine surface treatments, suggesting that tris buffer plays a unique role in improving adhesive performance even in the absence of polydopamine. We further showed that the use of polydopamine-3-aminopropyltriethoxysilane (APTES) hybrid surface treatments provided significant improvements in bond durability at extended deposition times relative to both polydopamine and an untreated control 
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650 7 |a Epoxy Compounds  |2 NLM 
650 7 |a Indoles  |2 NLM 
650 7 |a Phenols  |2 NLM 
650 7 |a Polymers  |2 NLM 
650 7 |a Propylamines  |2 NLM 
650 7 |a Silanes  |2 NLM 
650 7 |a polydopamine  |2 NLM 
650 7 |a bisphenol A diglycidyl ether  |2 NLM 
650 7 |a F3XRM1NX4H  |2 NLM 
650 7 |a amino-propyl-triethoxysilane  |2 NLM 
650 7 |a L8S6UBW552  |2 NLM 
650 7 |a bisphenol A  |2 NLM 
650 7 |a RW57K3X12M  |2 NLM 
700 1 |a Flanagan, David P  |e verfasserin  |4 aut 
700 1 |a Orlicki, Joshua A  |e verfasserin  |4 aut 
700 1 |a Lenhart, Joseph L  |e verfasserin  |4 aut 
700 1 |a Proctor, Kenneth L  |e verfasserin  |4 aut 
700 1 |a Knorr, Daniel B  |c Jr  |e verfasserin  |4 aut 
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