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(Hydroxy)apatite on cement: insights into a new surface treatment

Ronald J. Turner, Pieter Bots, Alan Richardson, Paul A. Bingham, Alex Scrimshire, Andrew Brown, Mark S’Ari, John Harrington, Susan A. Cumberland, Joanna C. Renshaw, Matthew J. Baker, Paul R. Edwards, Cerys Mitchell, Andrea Hamilton

Materials Advances, Volume: 2, Issue: 19, Pages: 6356 - 6368

Swansea University Author: Cerys Mitchell

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DOI (Published version): 10.1039/d1ma00320h

Abstract

(Hydroxy)apatite (HAp) [Ca10(PO4)6(OH)2], has emerging potential as a cement coating material, with applications in environmental remediation, nuclear waste storage and architectural preservation. In these low temperature environments and when precipitating from aqueous solution on to a porous subst...

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Published in: Materials Advances
ISSN: 2633-5409
Published: Royal Society of Chemistry (RSC) 2021
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URI: https://cronfa.swan.ac.uk/Record/cronfa58312
first_indexed 2021-10-13T09:31:01Z
last_indexed 2021-11-10T04:25:36Z
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spelling 2021-11-09T12:37:11.7060880 v2 58312 2021-10-13 (Hydroxy)apatite on cement: insights into a new surface treatment 263320f2aa9c80138c5a1ca44635b6ed Cerys Mitchell Cerys Mitchell true false 2021-10-13 (Hydroxy)apatite (HAp) [Ca10(PO4)6(OH)2], has emerging potential as a cement coating material, with applications in environmental remediation, nuclear waste storage and architectural preservation. In these low temperature environments and when precipitating from aqueous solution on to a porous substrate, the crystal size, nucleation sites and modified surface properties created are key to designing the most effective coating. In this study we show that bacterial (biogenic) or chemical (abiotic) syntheses on to Portland cement alter these critical performance parameters. We identify that the most significant difference between these two methods is the rate of pH change of the solution during synthesis, as this alters the surface properties and layer structure of HAp formed on cement. We show that iron present in Portland cement is not incorporated into the HAp structure; that formation of nanoparticulate/nanocrystalline HAp begins in the top 20–50 μm of the cement pore structure; and that a slow pH rise in the deposition solution controlled by bacteria metabolic activity leads to a rougher and more hydrophilic HAp coating compared to the abiotic synthesis. The results present the possibility of tailoring the surface topography and hydrophilicity of (hydroxy)apatite coated cement. Journal Article Materials Advances 2 19 6356 6368 Royal Society of Chemistry (RSC) 2633-5409 12 7 2021 2021-07-12 10.1039/d1ma00320h COLLEGE NANME COLLEGE CODE Swansea University Henry Royce Institute Identifier: FundRef 10.13039/100016128 Engineering and Physical Sciences Research Council Identifier: FundRef 10.13039/501100000266 2021-11-09T12:37:11.7060880 2021-10-13T10:28:16.1816199 Faculty of Science and Engineering School of Biosciences, Geography and Physics - Physics Ronald J. Turner 1 Pieter Bots 2 Alan Richardson 3 Paul A. Bingham 4 Alex Scrimshire 5 Andrew Brown 6 Mark S’Ari 7 John Harrington 8 Susan A. Cumberland 9 Joanna C. Renshaw 10 Matthew J. Baker 11 Paul R. Edwards 12 Cerys Mitchell 13 Andrea Hamilton 14 58312__21163__a91da1b1d2204650a87b2f2407ecfd77.pdf 58312.pdf 2021-10-13T10:31:21.4195474 Output 5675372 application/pdf Version of Record true © 2021 The Author(s). This article is licensed under a Creative Commons Attribution 3.0 Unported Licence true eng http://creativecommons.org/licenses/by/3.0/
title (Hydroxy)apatite on cement: insights into a new surface treatment
spellingShingle (Hydroxy)apatite on cement: insights into a new surface treatment
Cerys Mitchell
title_short (Hydroxy)apatite on cement: insights into a new surface treatment
title_full (Hydroxy)apatite on cement: insights into a new surface treatment
title_fullStr (Hydroxy)apatite on cement: insights into a new surface treatment
title_full_unstemmed (Hydroxy)apatite on cement: insights into a new surface treatment
title_sort (Hydroxy)apatite on cement: insights into a new surface treatment
author_id_str_mv 263320f2aa9c80138c5a1ca44635b6ed
author_id_fullname_str_mv 263320f2aa9c80138c5a1ca44635b6ed_***_Cerys Mitchell
author Cerys Mitchell
author2 Ronald J. Turner
Pieter Bots
Alan Richardson
Paul A. Bingham
Alex Scrimshire
Andrew Brown
Mark S’Ari
John Harrington
Susan A. Cumberland
Joanna C. Renshaw
Matthew J. Baker
Paul R. Edwards
Cerys Mitchell
Andrea Hamilton
format Journal article
container_title Materials Advances
container_volume 2
container_issue 19
container_start_page 6356
publishDate 2021
institution Swansea University
issn 2633-5409
doi_str_mv 10.1039/d1ma00320h
publisher Royal Society of Chemistry (RSC)
college_str Faculty of Science and Engineering
hierarchytype
hierarchy_top_id facultyofscienceandengineering
hierarchy_top_title Faculty of Science and Engineering
hierarchy_parent_id facultyofscienceandengineering
hierarchy_parent_title Faculty of Science and Engineering
department_str School of Biosciences, Geography and Physics - Physics{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Biosciences, Geography and Physics - Physics
document_store_str 1
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description (Hydroxy)apatite (HAp) [Ca10(PO4)6(OH)2], has emerging potential as a cement coating material, with applications in environmental remediation, nuclear waste storage and architectural preservation. In these low temperature environments and when precipitating from aqueous solution on to a porous substrate, the crystal size, nucleation sites and modified surface properties created are key to designing the most effective coating. In this study we show that bacterial (biogenic) or chemical (abiotic) syntheses on to Portland cement alter these critical performance parameters. We identify that the most significant difference between these two methods is the rate of pH change of the solution during synthesis, as this alters the surface properties and layer structure of HAp formed on cement. We show that iron present in Portland cement is not incorporated into the HAp structure; that formation of nanoparticulate/nanocrystalline HAp begins in the top 20–50 μm of the cement pore structure; and that a slow pH rise in the deposition solution controlled by bacteria metabolic activity leads to a rougher and more hydrophilic HAp coating compared to the abiotic synthesis. The results present the possibility of tailoring the surface topography and hydrophilicity of (hydroxy)apatite coated cement.
published_date 2021-07-12T07:54:41Z
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