Study of Protective Layers Based on Crosslinked Glutaraldehyde/3-aminopropyltriethoxysilane.

Alessandro Pistone,Consuelo Celesti,Annamaria Visco,Cristina Scolaro

doi:10.3390/polym14040801

Alessandro Pistone, Consuelo Celesti + Show 2 more

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https://doi.org/10.3390/polym14040801

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Abstract

In this paper, we report the synthesis and characterization of novel coatings based on (3-aminopropyl)-triethoxysilane (AP) mixed with different amounts of glutaraldehyde (GA). The synthesized coatings have been layered on a glass substrate and characterized by optical microscopy and roughness measurements, thermogravimetric analyses and differential scanning calorimetry, contact angle analysis, rheological measurement, and an adhesion test. It was observed that the higher the GA content (up to AP:GA ratio of 0.3), the sooner the crosslinking reaction starts, leading to a coating with increased hydrophobic and adhesion features without compromising the final AP cross-linked network. Hence, the obtained results show the effectiveness of AP modification with GA from the perspective of an application as protective coatings.

Highlights

Protective Layers Based on Biofouling is one of the main worldwide problems associated with boats because of its accumulation on the hull surface [1,2]
Much effort has been devoted to the development of efficient antifouling coatings and many studies have focused on advances in environmentally friendly antifouling coating techniques, using the principle of release of control biocides for marine applications [6–9]
Verma et al developed epoxy–polydimethylsiloxane based nanocomposite coatings with the inclusion of graphene oxide nanosheets, obtaining an improvement of hydrophobic character with water contact angle ranging from 90.1◦ to 115.2 and pull-off adhesion strength ranging from 1.32 to 5.94 MPa [21]

Summary

Introduction

Protective Layers Based on Biofouling is one of the main worldwide problems associated with boats because of its accumulation on the hull surface [1,2]. The downside of poly (dimethyl siloxane) coatings has always been their poor adhesion and mechanical properties. This aspect results in easy damage, e.g., during normal ship handling and navigation, reducing performance and lifetime, with the formation of local unprotected areas containing a decrease of hydrophobic character and adsorption of proteins, polysaccharides, and glycoproteins that can lead to the solid attachment of barnacles [19]. Verma et al developed epoxy–polydimethylsiloxane based nanocomposite coatings with the inclusion of graphene oxide nanosheets, obtaining an improvement of hydrophobic character with water contact angle ranging from 90.1◦ to 115.2 and pull-off adhesion strength ranging from 1.32 to 5.94 MPa [21].

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