Effect of Surfactant Concentration on the Long-Term Properties of a Colloidal Chemical, Biological and Radiological (CBR) Decontamination Gel

Chemically, biologically, or radiologically contaminated surfaces can be treated using colloidal “vacuumable” gels containing alumina particles as a thickening agent, decontaminating solutions to inhibit/eliminate biological and chemical contaminants, and Pluronic PE 6200 as a surfactant to adjust t...

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Autores principales:	Alban Gossard, Fabien Frances, Camille Aloin, Clara Penavayre, Nicolas Fabrègue, Célia Lepeytre
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	CBRN gel decontamination surfactant rheology Thermodynamics QC310.15-319 Descriptive and experimental mechanics QC120-168.85
Acceso en línea:	https://doaj.org/article/71beb1e2c3c34864966f49ea0d0f1fe9
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spelling	oai:doaj.org-article:71beb1e2c3c34864966f49ea0d0f1fe92021-11-25T17:31:46ZEffect of Surfactant Concentration on the Long-Term Properties of a Colloidal Chemical, Biological and Radiological (CBR) Decontamination Gel10.3390/fluids61104102311-5521https://doaj.org/article/71beb1e2c3c34864966f49ea0d0f1fe92021-11-01T00:00:00Zhttps://www.mdpi.com/2311-5521/6/11/410https://doaj.org/toc/2311-5521Chemically, biologically, or radiologically contaminated surfaces can be treated using colloidal “vacuumable” gels containing alumina particles as a thickening agent, decontaminating solutions to inhibit/eliminate biological and chemical contaminants, and Pluronic PE 6200 as a surfactant to adjust the gel’s physicochemical properties. These gels have been shown to remain efficient even after prolonged storage. In the present study, the properties of gels with different surfactant concentrations were monitored over several months using rheological analyses, contact angle measurements, and ion chromatography. Results show that the surfactant reacts with the hypochlorite ions in the decontaminating solution. This leads to sedimentation, which modifies the rheological properties of the gel. Increasing the surfactant concentration ensures the physicochemical properties of the gel are preserved for longer, but because the surfactant reacts with the hypochlorite ions, the concentration of the latter decreases drastically and thus so do the decontamination properties of the gel. There is therefore a trade-off between the efficiency of the gel against chemical and biological contamination at a given time and how long its physicochemical properties are preserved, with the optimal balance depending on its intended use.Alban GossardFabien FrancesCamille AloinClara PenavayreNicolas FabrègueCélia LepeytreMDPI AGarticleCBRNgeldecontaminationsurfactantrheologyThermodynamicsQC310.15-319Descriptive and experimental mechanicsQC120-168.85ENFluids, Vol 6, Iss 410, p 410 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	CBRN gel decontamination surfactant rheology Thermodynamics QC310.15-319 Descriptive and experimental mechanics QC120-168.85
spellingShingle	CBRN gel decontamination surfactant rheology Thermodynamics QC310.15-319 Descriptive and experimental mechanics QC120-168.85 Alban Gossard Fabien Frances Camille Aloin Clara Penavayre Nicolas Fabrègue Célia Lepeytre Effect of Surfactant Concentration on the Long-Term Properties of a Colloidal Chemical, Biological and Radiological (CBR) Decontamination Gel
description	Chemically, biologically, or radiologically contaminated surfaces can be treated using colloidal “vacuumable” gels containing alumina particles as a thickening agent, decontaminating solutions to inhibit/eliminate biological and chemical contaminants, and Pluronic PE 6200 as a surfactant to adjust the gel’s physicochemical properties. These gels have been shown to remain efficient even after prolonged storage. In the present study, the properties of gels with different surfactant concentrations were monitored over several months using rheological analyses, contact angle measurements, and ion chromatography. Results show that the surfactant reacts with the hypochlorite ions in the decontaminating solution. This leads to sedimentation, which modifies the rheological properties of the gel. Increasing the surfactant concentration ensures the physicochemical properties of the gel are preserved for longer, but because the surfactant reacts with the hypochlorite ions, the concentration of the latter decreases drastically and thus so do the decontamination properties of the gel. There is therefore a trade-off between the efficiency of the gel against chemical and biological contamination at a given time and how long its physicochemical properties are preserved, with the optimal balance depending on its intended use.
format	article
author	Alban Gossard Fabien Frances Camille Aloin Clara Penavayre Nicolas Fabrègue Célia Lepeytre
author_facet	Alban Gossard Fabien Frances Camille Aloin Clara Penavayre Nicolas Fabrègue Célia Lepeytre
author_sort	Alban Gossard
title	Effect of Surfactant Concentration on the Long-Term Properties of a Colloidal Chemical, Biological and Radiological (CBR) Decontamination Gel
title_short	Effect of Surfactant Concentration on the Long-Term Properties of a Colloidal Chemical, Biological and Radiological (CBR) Decontamination Gel
title_full	Effect of Surfactant Concentration on the Long-Term Properties of a Colloidal Chemical, Biological and Radiological (CBR) Decontamination Gel
title_fullStr	Effect of Surfactant Concentration on the Long-Term Properties of a Colloidal Chemical, Biological and Radiological (CBR) Decontamination Gel
title_full_unstemmed	Effect of Surfactant Concentration on the Long-Term Properties of a Colloidal Chemical, Biological and Radiological (CBR) Decontamination Gel
title_sort	effect of surfactant concentration on the long-term properties of a colloidal chemical, biological and radiological (cbr) decontamination gel
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/71beb1e2c3c34864966f49ea0d0f1fe9
work_keys_str_mv	AT albangossard effectofsurfactantconcentrationonthelongtermpropertiesofacolloidalchemicalbiologicalandradiologicalcbrdecontaminationgel AT fabienfrances effectofsurfactantconcentrationonthelongtermpropertiesofacolloidalchemicalbiologicalandradiologicalcbrdecontaminationgel AT camillealoin effectofsurfactantconcentrationonthelongtermpropertiesofacolloidalchemicalbiologicalandradiologicalcbrdecontaminationgel AT clarapenavayre effectofsurfactantconcentrationonthelongtermpropertiesofacolloidalchemicalbiologicalandradiologicalcbrdecontaminationgel AT nicolasfabregue effectofsurfactantconcentrationonthelongtermpropertiesofacolloidalchemicalbiologicalandradiologicalcbrdecontaminationgel AT celialepeytre effectofsurfactantconcentrationonthelongtermpropertiesofacolloidalchemicalbiologicalandradiologicalcbrdecontaminationgel
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Effect of Surfactant Concentration on the Long-Term Properties of a Colloidal Chemical, Biological and Radiological (CBR) Decontamination Gel

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