Amphiphilic zwitterionic-PDMS-based surface-modifying additives to tune fouling-release of siloxane-polyurethane marine coatings

Rahimi, Alireza; Stafslien, Shane J.; Vanderwal, Lyndsi; Finlay, John A.; Clare, Anthony S.; Webster, Dean C.

doi:10.1016/j.porgcoat.2020.105931

Cited by 30 publications

(32 citation statements)

References 72 publications

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“…This increase correlates with the WCA. The greater the change in WCA values, the greater the change in the SE of a coating. , The surface modulus is also an important factor of the fouling release performance, where a lower modulus is favorable for fouling release. , Figures b and S5 show the surface elastic modulus and the force–indentation curve of PDMS tTCBF- x coatings after immersion. PDMS has a modulus of ∼0.9 MPa, but PDMS tTCBF- x coatings exhibit an even lower modulus (∼0.6 MPa).…”

Section: Resultsmentioning

confidence: 99%

Silicone Elastomer with Self-Generating Zwitterions for Antifouling Coatings

Zeng

Zhou

et al. 2021

Langmuir

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Silicone elastomer-based fouling release coatings have been gaining increased attention in marine antibiofouling. However, the lack of fouling resistance limits their application. Introducing a zwitterionic polymer into silicone enhances its fouling resistance, but their incompatibility makes this challenging. In this work, a silicone elastomer with zwitterionic pendant chains has been prepared by grafting a telomer of tertiary carboxybetaine dodecafluoroheptyl ester ethyl acrylate (TCBF) and 3-mercaptopropyltriethoxysilane to the bis-silanol-terminated poly(dimethylsiloxane) (PDMS). The fluorocarbon groups drive the telomer onto the surface in the film formation process, while the TCBF groups hydrolyze and generate zwitterions on the surface, which is confirmed by attenuated total reflection infrared spectra analysis and water contact angle measurements. Bioassays using marine bacteria (Pseudomonas sp.) and diatoms (Navicula incerta) demonstrate that the antifouling efficacy is improved as the telomer content increases. The bacteria and diatom adhesion decreases by 95 and 81%, respectively, for the PDMS with 30 wt % telomer compared with the unmodified PDMS control. Meanwhile, the fouling release performance of PDMS is maintained with a pseudobarnacle removal strength of ∼0.1 MPa. This work provides a facile way to fabricate efficient silicone-based antifouling coatings.

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Section: Resultsmentioning

confidence: 99%

Silicone Elastomer with Self-Generating Zwitterions for Antifouling Coatings

Zeng

Zhou

et al. 2021

Langmuir

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“…In the alumina reinforced PSO/PDMS coat- In Figure 11, under the condition of 800-1400 rpm, the increase of alumina content and the decrease of particle size will decrease the drag reduction performance of the coatings. Some studies have shown that flexible materials have an obvious drag reduction effect, because the elastic modulus of the material is low, which can release friction resistance through surface deformation [34,35]. In the alumina reinforced PSO/PDMS coatings, the addition of alumina will increase the elastic modulus of the coatings, thus reducing the buffering effect of the coatings.…”

Section: Drag Reduction Performancementioning

confidence: 99%

The Antifouling and Drag-Reduction Performance of Alumina Reinforced Polydimethylsiloxane Coatings Containing Phenylmethylsilicone Oil

Yang

Zhang

et al. 2021

Polymers

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Fouling-release coatings reinforced with micro-alumina and nano-alumina were prepared based on polydimethylsiloxane (PDMS) containing phenylmethylsilicone oil. The surface properties, mechanical properties, leaching behavior of silicone oil, anti-fouling and drag-reduction performance of the coating were studied. The results show that the addition of alumina can significantly improve the tensile strength, elastic modulus and Shore’s hardness of the coating. The adhesion experiments of marine bacteria and Navicula Tenera show that the addition of alumina can reduce the antifouling performance of the coating, which is related to the stripping mode of fouling organisms. The fouling organisms leave the coating surface by shearing, and the energy required for shearing is proportional to the elastic modulus of the coating. At 800–1400 rpm, the addition of alumina will reduce the drag reduction performance of the coating, which is related to the drag reduction mechanism of PDMS. PDMS counteracts part of the resistance by surface deformation. The larger the elastic modulus is, the more difficult the surface deformation is. The experiment of silicone oil leaching shows that the increase of alumina addition amount and the decrease of particle size will inhibit the leaching of silicone oil.

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Section: Introductionmentioning

confidence: 99%

“…One approach has been the incorporation of amphiphilic additives, often in hydrophobic matrix systems, to improve the performance of FR coatings by modifying their surface . Reported surface-modifying additives include amphiphilic copolymers, − zwitterionic-based polymers, ,− and hydrogel-like polymers . Furthermore, silicone oils have been used as additives to take advantage of both critical surface tension and surface lubricating behavior. − Additionally, fillers such as sepiolite nanofibers, modified graphite, and carbon nanotubes and pigments, such as TiO 2 and ZnO, have shown enhanced FR performance and are recognized as specialty additives. ,− Most of these materials are incorporated in the systems to tune the surface to be amphiphilic.…”

Section: Introductionmentioning

confidence: 99%

“…2,11−15 One approach has been the incorporation of amphiphilic additives, often in hydrophobic matrix systems, to improve the performance of FR coatings by modifying their surface. 16 Reported surface-modifying additives include amphiphilic copolymers, 17−22 zwitterionic-based polymers, 16,23−26 and hydrogel-like polymers. 27 Furthermore, silicone oils have been used as additives to take advantage of both critical surface tension and surface lubricating behavior.…”

Section: ■ Introductionmentioning

confidence: 99%

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Critical Amphiphilic Concentration: Effect of the Extent of Amphiphilicity on Marine Fouling-Release Performance

et al. 2021

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Amphiphilic surfaces, containing both hydrophilic and hydrophobic domains, offer desirable performance for many applications such as marine coatings or anti-icing purposes. This work explores the effect of the concentration of amphiphilic moieties on converting a polyurethane (PU) system to a coating having fouling-release properties. A novel amphiphilic compound is synthesized and added at increasing amounts to a PU system, where the amount of the additive is the only variable in the study. The additive-modified surfaces are characterized by a variety of techniques including ATR-FTIR, XPS, contact angle measurements, and AFM. Surface characterizations indicate the presence of amphiphilic domains on the surface due to the introduction of the selfstratifying amphiphilic additive. The fouling-release properties of the surfaces are assessed with three biological assays using Ulva linza, Cellulophaga lytica, and Navicula Incerta as the test organisms. A change in the fouling-release performance is observed and plateaued once a certain amount of amphiphilicity is attained in the coating system, which we call the critical amphiphilic concentration (CAC).

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Amphiphilic zwitterionic-PDMS-based surface-modifying additives to tune fouling-release of siloxane-polyurethane marine coatings

Cited by 30 publications

References 72 publications

Silicone Elastomer with Self-Generating Zwitterions for Antifouling Coatings

Silicone Elastomer with Self-Generating Zwitterions for Antifouling Coatings

The Antifouling and Drag-Reduction Performance of Alumina Reinforced Polydimethylsiloxane Coatings Containing Phenylmethylsilicone Oil

Critical Amphiphilic Concentration: Effect of the Extent of Amphiphilicity on Marine Fouling-Release Performance

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