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Surface and bulk properties of surfactants used in fire-fighting

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Surface and bulk properties of surfactants used in fire-fighting. / Hill, Christopher; Czajka, Adam; Hazell, Gavin; Grillo, Isabelle; Rogers, Sarah E.; Skoda, Maximilian W.A.; Joslin, Nigel; Payne, John; Eastoe, Julian.

In: Journal of Colloid and Interface Science, Vol. 530, 15.11.2018, p. 686-694.

Research output: Contribution to journalArticle

Harvard

Hill, C, Czajka, A, Hazell, G, Grillo, I, Rogers, SE, Skoda, MWA, Joslin, N, Payne, J & Eastoe, J 2018, 'Surface and bulk properties of surfactants used in fire-fighting', Journal of Colloid and Interface Science, vol. 530, pp. 686-694. https://doi.org/10.1016/j.jcis.2018.07.023

APA

Hill, C., Czajka, A., Hazell, G., Grillo, I., Rogers, S. E., Skoda, M. W. A., ... Eastoe, J. (2018). Surface and bulk properties of surfactants used in fire-fighting. Journal of Colloid and Interface Science, 530, 686-694. https://doi.org/10.1016/j.jcis.2018.07.023

Vancouver

Hill C, Czajka A, Hazell G, Grillo I, Rogers SE, Skoda MWA et al. Surface and bulk properties of surfactants used in fire-fighting. Journal of Colloid and Interface Science. 2018 Nov 15;530:686-694. https://doi.org/10.1016/j.jcis.2018.07.023

Author

Hill, Christopher ; Czajka, Adam ; Hazell, Gavin ; Grillo, Isabelle ; Rogers, Sarah E. ; Skoda, Maximilian W.A. ; Joslin, Nigel ; Payne, John ; Eastoe, Julian. / Surface and bulk properties of surfactants used in fire-fighting. In: Journal of Colloid and Interface Science. 2018 ; Vol. 530. pp. 686-694.

Bibtex

@article{eab64a51f75a481cb7ffbe5b7e99a389,
title = "Surface and bulk properties of surfactants used in fire-fighting",
abstract = "Hypothesis: Reports on the colloidal and interfacial properties of fluorocarbon (FC) surfactants used in fire-fighting foam formulations are rare. This is primarily because these formulations are complex mixtures of different hydrocarbon (HC) and fluorocarbon (FC) surfactants. By developing a greater understanding of the individual properties of these commercial FC surfactants, links can be made between structure and respective surface/ bulk behaviour. Improved understanding of structure property relationships of FC surfactants will therefore facilitate the design of more environmentally responsible surfactant replacements. Experiments: Surface properties of three partially fluorinated technical grade surfactants were determined using tensiometry and neutron reflection (NR), and compared with a research-grade reference surfactant (sodium perfluorooctanoate (NaPFO)). To investigate the bulk behaviour and self-assembly in solution, small-angle neutron (SANS) scattering was used. Findings: All FC surfactants in this study generate very low surface tensions (< 20 mN m−1) which are comparable, and in some cases, lower than fully-fluorinated surfactant analogues. The complementary techniques (tensiometry and NR) allowed direct comparison to be made with NaPFO in terms of adsorption parameters such as surface excess and area per molecule. Surface tension data for these technical grade FC surfactants were not amenable to reliable interpretation using the Gibbs adsorption equation, however NR provided reliable results. SANS has highlighted how changes in surfactant head group structure can affect bulk properties. This work therefore provides fresh insight into the structure property relationships of some industrially relevant FC surfactants, highlighting properties which are essential for development of more environmentally friendly replacements.",
keywords = "Fire-fighting foam formulations, Fluorocarbon surfactants, Neutron reflection, Self-assembly, Small-angle neutron scattering",
author = "Christopher Hill and Adam Czajka and Gavin Hazell and Isabelle Grillo and Rogers, {Sarah E.} and Skoda, {Maximilian W.A.} and Nigel Joslin and John Payne and Julian Eastoe",
year = "2018",
month = "11",
day = "15",
doi = "10.1016/j.jcis.2018.07.023",
language = "English",
volume = "530",
pages = "686--694",
journal = "Journal of Colloid and Interface Science",
issn = "0021-9797",
publisher = "Elsevier",

}

RIS - suitable for import to EndNote

TY - JOUR

T1 - Surface and bulk properties of surfactants used in fire-fighting

AU - Hill, Christopher

AU - Czajka, Adam

AU - Hazell, Gavin

AU - Grillo, Isabelle

AU - Rogers, Sarah E.

AU - Skoda, Maximilian W.A.

AU - Joslin, Nigel

AU - Payne, John

AU - Eastoe, Julian

PY - 2018/11/15

Y1 - 2018/11/15

N2 - Hypothesis: Reports on the colloidal and interfacial properties of fluorocarbon (FC) surfactants used in fire-fighting foam formulations are rare. This is primarily because these formulations are complex mixtures of different hydrocarbon (HC) and fluorocarbon (FC) surfactants. By developing a greater understanding of the individual properties of these commercial FC surfactants, links can be made between structure and respective surface/ bulk behaviour. Improved understanding of structure property relationships of FC surfactants will therefore facilitate the design of more environmentally responsible surfactant replacements. Experiments: Surface properties of three partially fluorinated technical grade surfactants were determined using tensiometry and neutron reflection (NR), and compared with a research-grade reference surfactant (sodium perfluorooctanoate (NaPFO)). To investigate the bulk behaviour and self-assembly in solution, small-angle neutron (SANS) scattering was used. Findings: All FC surfactants in this study generate very low surface tensions (< 20 mN m−1) which are comparable, and in some cases, lower than fully-fluorinated surfactant analogues. The complementary techniques (tensiometry and NR) allowed direct comparison to be made with NaPFO in terms of adsorption parameters such as surface excess and area per molecule. Surface tension data for these technical grade FC surfactants were not amenable to reliable interpretation using the Gibbs adsorption equation, however NR provided reliable results. SANS has highlighted how changes in surfactant head group structure can affect bulk properties. This work therefore provides fresh insight into the structure property relationships of some industrially relevant FC surfactants, highlighting properties which are essential for development of more environmentally friendly replacements.

AB - Hypothesis: Reports on the colloidal and interfacial properties of fluorocarbon (FC) surfactants used in fire-fighting foam formulations are rare. This is primarily because these formulations are complex mixtures of different hydrocarbon (HC) and fluorocarbon (FC) surfactants. By developing a greater understanding of the individual properties of these commercial FC surfactants, links can be made between structure and respective surface/ bulk behaviour. Improved understanding of structure property relationships of FC surfactants will therefore facilitate the design of more environmentally responsible surfactant replacements. Experiments: Surface properties of three partially fluorinated technical grade surfactants were determined using tensiometry and neutron reflection (NR), and compared with a research-grade reference surfactant (sodium perfluorooctanoate (NaPFO)). To investigate the bulk behaviour and self-assembly in solution, small-angle neutron (SANS) scattering was used. Findings: All FC surfactants in this study generate very low surface tensions (< 20 mN m−1) which are comparable, and in some cases, lower than fully-fluorinated surfactant analogues. The complementary techniques (tensiometry and NR) allowed direct comparison to be made with NaPFO in terms of adsorption parameters such as surface excess and area per molecule. Surface tension data for these technical grade FC surfactants were not amenable to reliable interpretation using the Gibbs adsorption equation, however NR provided reliable results. SANS has highlighted how changes in surfactant head group structure can affect bulk properties. This work therefore provides fresh insight into the structure property relationships of some industrially relevant FC surfactants, highlighting properties which are essential for development of more environmentally friendly replacements.

KW - Fire-fighting foam formulations

KW - Fluorocarbon surfactants

KW - Neutron reflection

KW - Self-assembly

KW - Small-angle neutron scattering

UR - http://www.scopus.com/inward/record.url?scp=85049759022&partnerID=8YFLogxK

U2 - 10.1016/j.jcis.2018.07.023

DO - 10.1016/j.jcis.2018.07.023

M3 - Article

C2 - 30015154

AN - SCOPUS:85049759022

VL - 530

SP - 686

EP - 694

JO - Journal of Colloid and Interface Science

JF - Journal of Colloid and Interface Science

SN - 0021-9797

ER -