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...
| Main Authors: | , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2021-11-01
|
| Series: | Fluids |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2311-5521/6/11/410 |
| _version_ | 1797510367981600768 |
|---|---|
| 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 |
| collection | DOAJ |
| 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. |
| first_indexed | 2024-03-10T05:30:31Z |
| format | Article |
| id | doaj.art-71beb1e2c3c34864966f49ea0d0f1fe9 |
| institution | Directory Open Access Journal |
| issn | 2311-5521 |
| language | English |
| last_indexed | 2024-03-10T05:30:31Z |
| publishDate | 2021-11-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Fluids |
| spelling | doaj.art-71beb1e2c3c34864966f49ea0d0f1fe92023-11-22T23:17:46ZengMDPI AGFluids2311-55212021-11-0161141010.3390/fluids6110410Effect of Surfactant Concentration on the Long-Term Properties of a Colloidal Chemical, Biological and Radiological (CBR) Decontamination GelAlban Gossard0Fabien Frances1Camille Aloin2Clara Penavayre3Nicolas Fabrègue4Célia Lepeytre5CEA, DES, ISEC, DMRC, Univ Montpellier, Marcoule, FranceCEA, DES, ISEC, DMRC, Univ Montpellier, Marcoule, FranceCEA, DES, ISEC, DMRC, Univ Montpellier, Marcoule, FranceCEA, DES, ISEC, DMRC, Univ Montpellier, Marcoule, FranceCEA, DES, ISEC, DMRC, Univ Montpellier, Marcoule, FranceCEA, DES, ISEC, DMRC, Univ Montpellier, Marcoule, FranceChemically, 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.https://www.mdpi.com/2311-5521/6/11/410CBRNgeldecontaminationsurfactantrheology |
| spellingShingle | 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 Fluids CBRN gel decontamination surfactant rheology |
| title | 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_short | 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 |
| topic | CBRN gel decontamination surfactant rheology |
| url | https://www.mdpi.com/2311-5521/6/11/410 |
| work_keys_str_mv | AT albangossard effectofsurfactantconcentrationonthelongtermpropertiesofacolloidalchemicalbiologicalandradiologicalcbrdecontaminationgel AT fabienfrances effectofsurfactantconcentrationonthelongtermpropertiesofacolloidalchemicalbiologicalandradiologicalcbrdecontaminationgel AT camillealoin effectofsurfactantconcentrationonthelongtermpropertiesofacolloidalchemicalbiologicalandradiologicalcbrdecontaminationgel AT clarapenavayre effectofsurfactantconcentrationonthelongtermpropertiesofacolloidalchemicalbiologicalandradiologicalcbrdecontaminationgel AT nicolasfabregue effectofsurfactantconcentrationonthelongtermpropertiesofacolloidalchemicalbiologicalandradiologicalcbrdecontaminationgel AT celialepeytre effectofsurfactantconcentrationonthelongtermpropertiesofacolloidalchemicalbiologicalandradiologicalcbrdecontaminationgel |