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Silica Nanoparticles Functionalized with Zwitterionic Sulfobetaine Siloxane for Application as a Versatile Antifouling Coating System

Journal Article


Abstract


  • The growing need to develop surfaces able to effectively

    resist biological fouling has resulted in the widespread investigation of

    nanomaterials with potential antifouling properties. However, the

    preparation of effective antifouling coatings is limited by the availability

    of reactive surface functional groups and our ability to carefully control

    and organize chemistries at a materials’ interface. Here, we present two

    methods of preparing hydrophilic low-fouling surface coatings through

    reaction of silica-nanoparticle suspensions and predeposited silicananoparticle

    films with zwitterionic sulfobetaine (SB). Silica-nanoparticle

    suspensions were functionalized with SB across three pH conditions and

    deposited as thin films via a simple spin-coating process to generate

    hydrophilic antifouling coatings. In addition, coatings of predeposited

    silica nanoparticles were surface functionalized via exposure to

    zwitterionic solutions. Quartz crystal microgravimetry with dissipation

    monitoring was employed as a high throughput technique for monitoring and optimizing reaction to the silica-nanoparticle

    surfaces. Functionalization of nanoparticle films was rapid and could be achieved over a wide pH range and at low zwitterion

    concentrations. All functionalized particle surfaces presented a high degree of wettability and resulted in large reductions in

    adsorption of bovine serum albumin protein. Particle coatings also showed a reduction in adhesion of fungal spores (Epicoccum

    nigrum) and bacteria (Escherichia coli) by up to 87 and 96%, respectively. These results indicate the potential for functionalized

    nanosilicas to be further developed as versatile fouling-resistant coatings for widespread coating applications.

Publication Date


  • 2017

Citation


  • Knowles, B. R., Wagner, P., MacLaughlin, S., Higgins, M. J. & Molino, P. J. (2017). Silica Nanoparticles Functionalized with Zwitterionic Sulfobetaine Siloxane for Application as a Versatile Antifouling Coating System. ACS Applied Materials and Interfaces, 9 (22), 18584-18594.

Number Of Pages


  • 10

Start Page


  • 18584

End Page


  • 18594

Volume


  • 9

Issue


  • 22

Abstract


  • The growing need to develop surfaces able to effectively

    resist biological fouling has resulted in the widespread investigation of

    nanomaterials with potential antifouling properties. However, the

    preparation of effective antifouling coatings is limited by the availability

    of reactive surface functional groups and our ability to carefully control

    and organize chemistries at a materials’ interface. Here, we present two

    methods of preparing hydrophilic low-fouling surface coatings through

    reaction of silica-nanoparticle suspensions and predeposited silicananoparticle

    films with zwitterionic sulfobetaine (SB). Silica-nanoparticle

    suspensions were functionalized with SB across three pH conditions and

    deposited as thin films via a simple spin-coating process to generate

    hydrophilic antifouling coatings. In addition, coatings of predeposited

    silica nanoparticles were surface functionalized via exposure to

    zwitterionic solutions. Quartz crystal microgravimetry with dissipation

    monitoring was employed as a high throughput technique for monitoring and optimizing reaction to the silica-nanoparticle

    surfaces. Functionalization of nanoparticle films was rapid and could be achieved over a wide pH range and at low zwitterion

    concentrations. All functionalized particle surfaces presented a high degree of wettability and resulted in large reductions in

    adsorption of bovine serum albumin protein. Particle coatings also showed a reduction in adhesion of fungal spores (Epicoccum

    nigrum) and bacteria (Escherichia coli) by up to 87 and 96%, respectively. These results indicate the potential for functionalized

    nanosilicas to be further developed as versatile fouling-resistant coatings for widespread coating applications.

Publication Date


  • 2017

Citation


  • Knowles, B. R., Wagner, P., MacLaughlin, S., Higgins, M. J. & Molino, P. J. (2017). Silica Nanoparticles Functionalized with Zwitterionic Sulfobetaine Siloxane for Application as a Versatile Antifouling Coating System. ACS Applied Materials and Interfaces, 9 (22), 18584-18594.

Number Of Pages


  • 10

Start Page


  • 18584

End Page


  • 18594

Volume


  • 9

Issue


  • 22