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Polymerization-Induced Phase Segregation and Self-Assembly of Siloxane Additives to Provide Thermoset Coatings with a Defined Surface Topology and Biocidal and Self-Cleaning Properties

In this work, we report on the incorporation of a siloxane copolymer additive, poly((2-phenylethyl) methylsiloxane)-co(1-phenylethyl) methylsiloxane)-co-dimethylsiloxane), which is fully soluble at room temperature, in a rapid-cure thermoset polyester coating formulation. The additive undergoes poly...

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Autores principales: Mansouri, Jaleh, Truong, Vi Khanh, MacLaughlin, Shane, Mainwaring, David E., Moad, Graeme, Dagley, Ian J., Ivanova, Elena P., Crawford, Russell J., Chen, Vicki
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2019
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6915580/
https://www.ncbi.nlm.nih.gov/pubmed/31766238
http://dx.doi.org/10.3390/nano9111610
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author Mansouri, Jaleh
Truong, Vi Khanh
MacLaughlin, Shane
Mainwaring, David E.
Moad, Graeme
Dagley, Ian J.
Ivanova, Elena P.
Crawford, Russell J.
Chen, Vicki
author_facet Mansouri, Jaleh
Truong, Vi Khanh
MacLaughlin, Shane
Mainwaring, David E.
Moad, Graeme
Dagley, Ian J.
Ivanova, Elena P.
Crawford, Russell J.
Chen, Vicki
author_sort Mansouri, Jaleh
collection PubMed
description In this work, we report on the incorporation of a siloxane copolymer additive, poly((2-phenylethyl) methylsiloxane)-co(1-phenylethyl) methylsiloxane)-co-dimethylsiloxane), which is fully soluble at room temperature, in a rapid-cure thermoset polyester coating formulation. The additive undergoes polymerization-induced phase segregation (PIPS) to self-assemble on the coating surface as discrete discoid nanofeatures during the resin cure process. Moreover, the copolymer facilitates surface co-segregation of titanium dioxide pigment microparticulate present in the coating. Depending on the composition, the coatings can display persistent superhydrophobicity and self-cleaning properties and, surprisingly, the titanium dioxide pigmented coatings that include the siloxane copolymer additive display high levels of antibacterial performance against Gram-positive (Staphylococcus aureus) and Gram-negative (Pseudomonas aeruginosa) bacteria. This antibacterial performance is believed to be associated with the unique surface topology of these coatings, which comprise stimuli-responsive discoid nanofeatures. This paper provides details of the surface morphology of the coatings and how these relates to the antimicrobial properties of the coating.
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spelling pubmed-69155802019-12-24 Polymerization-Induced Phase Segregation and Self-Assembly of Siloxane Additives to Provide Thermoset Coatings with a Defined Surface Topology and Biocidal and Self-Cleaning Properties Mansouri, Jaleh Truong, Vi Khanh MacLaughlin, Shane Mainwaring, David E. Moad, Graeme Dagley, Ian J. Ivanova, Elena P. Crawford, Russell J. Chen, Vicki Nanomaterials (Basel) Article In this work, we report on the incorporation of a siloxane copolymer additive, poly((2-phenylethyl) methylsiloxane)-co(1-phenylethyl) methylsiloxane)-co-dimethylsiloxane), which is fully soluble at room temperature, in a rapid-cure thermoset polyester coating formulation. The additive undergoes polymerization-induced phase segregation (PIPS) to self-assemble on the coating surface as discrete discoid nanofeatures during the resin cure process. Moreover, the copolymer facilitates surface co-segregation of titanium dioxide pigment microparticulate present in the coating. Depending on the composition, the coatings can display persistent superhydrophobicity and self-cleaning properties and, surprisingly, the titanium dioxide pigmented coatings that include the siloxane copolymer additive display high levels of antibacterial performance against Gram-positive (Staphylococcus aureus) and Gram-negative (Pseudomonas aeruginosa) bacteria. This antibacterial performance is believed to be associated with the unique surface topology of these coatings, which comprise stimuli-responsive discoid nanofeatures. This paper provides details of the surface morphology of the coatings and how these relates to the antimicrobial properties of the coating. MDPI 2019-11-13 /pmc/articles/PMC6915580/ /pubmed/31766238 http://dx.doi.org/10.3390/nano9111610 Text en © 2019 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Mansouri, Jaleh
Truong, Vi Khanh
MacLaughlin, Shane
Mainwaring, David E.
Moad, Graeme
Dagley, Ian J.
Ivanova, Elena P.
Crawford, Russell J.
Chen, Vicki
Polymerization-Induced Phase Segregation and Self-Assembly of Siloxane Additives to Provide Thermoset Coatings with a Defined Surface Topology and Biocidal and Self-Cleaning Properties
title Polymerization-Induced Phase Segregation and Self-Assembly of Siloxane Additives to Provide Thermoset Coatings with a Defined Surface Topology and Biocidal and Self-Cleaning Properties
title_full Polymerization-Induced Phase Segregation and Self-Assembly of Siloxane Additives to Provide Thermoset Coatings with a Defined Surface Topology and Biocidal and Self-Cleaning Properties
title_fullStr Polymerization-Induced Phase Segregation and Self-Assembly of Siloxane Additives to Provide Thermoset Coatings with a Defined Surface Topology and Biocidal and Self-Cleaning Properties
title_full_unstemmed Polymerization-Induced Phase Segregation and Self-Assembly of Siloxane Additives to Provide Thermoset Coatings with a Defined Surface Topology and Biocidal and Self-Cleaning Properties
title_short Polymerization-Induced Phase Segregation and Self-Assembly of Siloxane Additives to Provide Thermoset Coatings with a Defined Surface Topology and Biocidal and Self-Cleaning Properties
title_sort polymerization-induced phase segregation and self-assembly of siloxane additives to provide thermoset coatings with a defined surface topology and biocidal and self-cleaning properties
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6915580/
https://www.ncbi.nlm.nih.gov/pubmed/31766238
http://dx.doi.org/10.3390/nano9111610
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