Effect of N-(2-Aminoethyl)-3-Aminopropyltrimethoxysilane on the Adhesion of the Modified Silicone Tie-Coating to Epoxy Primer

Abstract

In this work, modified silicone tie-paints were prepared in a simple way for securing adhesion between the epoxy anticorrosive primer and silicone fouling release coating. Hydroxy-terminated polydimethylsiloxane (PDMS) mixture containing fillers and accessory ingredient was prepared as base component. N-(2-Aminoethyl)-3-aminopropyltrimethoxysilane (DAMO) was mechanically mixed with other functional additives as curing component. ATR-FTIR, XPS, SEM and tensile tests were used to investigate the chemical structure, morphology and mechanical properties of the tie-coatings. It was focused on the effect of the DAMO content on the adhesion of the tie-coating to epoxy primer. Peel off and shear tests were carried out to evaluate the adhesion. The results showed that introducing DAMO can significantly improve the properties of the tie-coating. The adhesion between the tie-coating and the epoxy primer increases with the increase of DAMO content, but the excessive DAMO content will decrease the fracture strength of the tie-coating and decrease the quality of the coating. When the DAMO content in tie-coating is 1.97 wt.%, the tie-coating performs excellent in the interlaminar adhesion, shear strength and mechanical properties.

The Interfacial Structure and Adhesion Mechanism of N-(2-Aminoethyl)-3-aminopropyltrimethoxysilane and Epoxy Modified Silicone Tie-Coating to Epoxy Primer

“…Increasing the E51 content to 33.9% and 41%, the shear strength was in turn 0.31 Mpa and 0.33 Mpa. These values are higher than the maximum shear strength (0.29 Mpa) reported in the previous investigation [ 13 ]. This shows that the silicone tie-coating modified jointly by both an epoxy and a silane coupling agent has a higher interlayer bonding strength than that of the silicone tie-coating, which is modified only by the silane coupling agent.…”

“…Silicone antifouling coatings prepared from PDMS are widely used due to their advantages of non-toxic, economical and excellent antifouling effect [ 12 ]. However, its adhesion on the epoxy primer is poor, and it easily falls from the epoxy primer, resulting in a failure of the antifouling effect [ 13 , 14 ].…”

“…The silane coupling agent is introduced into the silicone coating and the coating can be given the function of connecting with the epoxy primer. In our previous study [ 13 ], we introduced a certain amount of N -(2-Aminoethyl)-3-aminopropyltrimethoxysilane (DAMO) into PDMS by mechanical mixing, and the coating was cured under the action of the catalyst and a curing agent. The coating showed a good tie performance.…”

Modification strategy of siloxane antifouling coating: adhesion strength, static antifouling, and self-healing properties

“…However, the potential for improvement using this modification method is limited [53]. Alternatively, adhesion strength can be significantly enhanced through other methods like chemical bonding [54]. For instance, Lin et al [50] developed a high-adhesion siloxane coating based on strong bond cooperation inspired by the exceptional adhesive performance of bionic mussels, as shown in Fig.…”

Tailoring Nanoadsorbent Surfaces: Separation of Rare Earths and Late Transition Metals in Recycling of Magnet Materials

“…Previously, N-(2-Aminoethyl)-3-aminopropyltrimethoxysilane has been used in modification of silicone tie-paints as a curing component, resulting in significantly improved adhesion between the tie-coating and the epoxy primer [ 35 ]. In another work by Zhang et al [ 36 ], L1 was used for lacquer surface modifications, which showed considerably enhanced aging and corrosion resistance properties. To the best of our knowledge, none of these ligands ( L1–5 ) have previously been tested for metal uptake and selective adsorption.…”