The surface properties of some silicone and fluorosilicone coating materials immersed in seawater

Francis Fernández Estarlich; Susan A. Lewey; Thomas G. Nevell; Adrian A. Thorpe; John Tsibouklis; Andrew C. Upton

doi:10.1080/08927010009378450

The surface properties of some silicone and fluorosilicone coating materials immersed in seawater

Francis Fernández Estarlich, Susan A. Lewey, Thomas G. Nevell^*, Adrian A. Thorpe, John Tsibouklis, Andrew C. Upton

^*Corresponding author for this work

Institute of Life Sciences and Healthcare

Solent University

Research output: Contribution to journal › Article › peer-review

Abstract

Changes in the surface properties of some silicone elastomers (General Electric RTV11, RTV160 and RTV655) and fluorosilicones (-(Si(CH₃)((CH₂)₃- O(CH₂)₂(CF₂)_xCF₃)-O)_n-, x = 5,7,9) on prolonged immersion in water (distilled water, artificial seawater, filtered and unfiltered seawater) have been investigated using measurements of advancing and receding contact angles, of surface roughness and of water uptake. Considerable increases in hydrophilicity and surface rugosity are attributed mainly to surface structural rearrangements accompanying absorption of water; these effects are greater for the fluorosilicones and the rugosity of RTV160 also increased considerably. Observations of early marine settlement (up to 16 weeks in flowing seawater), visualised by scanning electron microscopy, showed patchy attachment mainly of bacteria and microalgae while mature biofilms were formed on the poly(methylmethacrylate) controls. Although settlement was least on RTV11 and greatest on the fluorosilicones, the range of variation was small relative to the differences in the long-term fouling resistance of the materials: The design requirements for fouling resistance of a smooth, soft, uniform surface are supported.

Original language	English
Pages (from-to)	263-275
Number of pages	13
Journal	Biofouling
Volume	16
Issue number	2-4
DOIs	https://doi.org/10.1080/08927010009378450
Publication status	Published - 1 Jan 2000

Keywords

Biofilm
Fluorosilicones
Silicone elastomers
Surfaces

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1080/08927010009378450

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abstract = "Changes in the surface properties of some silicone elastomers (General Electric RTV11, RTV160 and RTV655) and fluorosilicones (-(Si(CH3)((CH2)3- O(CH2)2(CF2)xCF3)-O)n-, x = 5,7,9) on prolonged immersion in water (distilled water, artificial seawater, filtered and unfiltered seawater) have been investigated using measurements of advancing and receding contact angles, of surface roughness and of water uptake. Considerable increases in hydrophilicity and surface rugosity are attributed mainly to surface structural rearrangements accompanying absorption of water; these effects are greater for the fluorosilicones and the rugosity of RTV160 also increased considerably. Observations of early marine settlement (up to 16 weeks in flowing seawater), visualised by scanning electron microscopy, showed patchy attachment mainly of bacteria and microalgae while mature biofilms were formed on the poly(methylmethacrylate) controls. Although settlement was least on RTV11 and greatest on the fluorosilicones, the range of variation was small relative to the differences in the long-term fouling resistance of the materials: The design requirements for fouling resistance of a smooth, soft, uniform surface are supported.",

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AU - Estarlich, Francis Fernández

AU - Lewey, Susan A.

AU - Nevell, Thomas G.

AU - Thorpe, Adrian A.

AU - Tsibouklis, John

AU - Upton, Andrew C.

PY - 2000/1/1

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N2 - Changes in the surface properties of some silicone elastomers (General Electric RTV11, RTV160 and RTV655) and fluorosilicones (-(Si(CH3)((CH2)3- O(CH2)2(CF2)xCF3)-O)n-, x = 5,7,9) on prolonged immersion in water (distilled water, artificial seawater, filtered and unfiltered seawater) have been investigated using measurements of advancing and receding contact angles, of surface roughness and of water uptake. Considerable increases in hydrophilicity and surface rugosity are attributed mainly to surface structural rearrangements accompanying absorption of water; these effects are greater for the fluorosilicones and the rugosity of RTV160 also increased considerably. Observations of early marine settlement (up to 16 weeks in flowing seawater), visualised by scanning electron microscopy, showed patchy attachment mainly of bacteria and microalgae while mature biofilms were formed on the poly(methylmethacrylate) controls. Although settlement was least on RTV11 and greatest on the fluorosilicones, the range of variation was small relative to the differences in the long-term fouling resistance of the materials: The design requirements for fouling resistance of a smooth, soft, uniform surface are supported.

AB - Changes in the surface properties of some silicone elastomers (General Electric RTV11, RTV160 and RTV655) and fluorosilicones (-(Si(CH3)((CH2)3- O(CH2)2(CF2)xCF3)-O)n-, x = 5,7,9) on prolonged immersion in water (distilled water, artificial seawater, filtered and unfiltered seawater) have been investigated using measurements of advancing and receding contact angles, of surface roughness and of water uptake. Considerable increases in hydrophilicity and surface rugosity are attributed mainly to surface structural rearrangements accompanying absorption of water; these effects are greater for the fluorosilicones and the rugosity of RTV160 also increased considerably. Observations of early marine settlement (up to 16 weeks in flowing seawater), visualised by scanning electron microscopy, showed patchy attachment mainly of bacteria and microalgae while mature biofilms were formed on the poly(methylmethacrylate) controls. Although settlement was least on RTV11 and greatest on the fluorosilicones, the range of variation was small relative to the differences in the long-term fouling resistance of the materials: The design requirements for fouling resistance of a smooth, soft, uniform surface are supported.

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The surface properties of some silicone and fluorosilicone coating materials immersed in seawater

Abstract

Keywords

UN SDGs

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