Essential Factor of Perfluoroalkyl Surfactants Contributing to Efficacy in Firefighting Foams

被引:17
作者
Banerjee, Anirudha [1 ]
Liu, Yihan [1 ]
机构
[1] Dow Chem Co USA, Performance Silicones Res & Dev, Auburn, MI 48611 USA
关键词
FLUORINE-FREE; EMULSIFICATION; STABILITY; FILMS;
D O I
10.1021/acs.langmuir.1c00463
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Two simple model aqueous foams, one made from a perfluoroalkyl surfactant and one from a silicone polyether surfactant, are compared with regard to their stability in contact with heptane as a model fuel oil. The observed foam stabilities are explained in terms of the equilibrium phase behavior of the system water-surfactant-heptane. It is demonstrated that the fundamental enabling factor that makes perfluoroalkyl surfactant perform exceedingly well in stabilizing foams on hydrocarbon fuel oil is its oleophobicity. For hydrocarbon or silicone surfactants, the propensity for the surfactant phase to solubilize hydrocarbon oil and be solubilized in the oil destabilizes the foam. This is particularly so if the surfactant's phase inversion by temperature (PIT) range falls within the application temperature range.
引用
收藏
页码:8937 / 8944
页数:8
相关论文
共 27 条
  • [1] Synergisms between siloxane-polyoxyethylene and alkyl polyglycoside surfactants in foam stability and pool fire extinction
    Ananth, Ramagopal
    Snow, Arthur W.
    Hinnant, Katherine M.
    Giles, Spencer L.
    Farley, John P.
    [J]. COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS, 2019, 579
  • [2] [Anonymous], 2020, 16 C SS 2019 2020 16 C SS 2019 2020
  • [3] [Anonymous], 2002, NATL RESEARCHINSTITU
  • [4] The theory of emulsification, V
    Bancroft, WD
    [J]. JOURNAL OF PHYSICAL CHEMISTRY, 1913, 17 (06) : 501 - 519
  • [5] Binks B. P., 1998, R SOC CHEM, P26
  • [6] Investigations on the role of surfactants in mechanical emulsification using a high-pressure homogenizer with an orifice valve
    Brösel, S
    Schubert, H
    [J]. CHEMICAL ENGINEERING AND PROCESSING-PROCESS INTENSIFICATION, 1999, 38 (4-6) : 533 - 540
  • [7] Surfactants at the Design Limit
    Czajka, Adam
    Hazell, Gavin
    Eastoe, Julian
    [J]. LANGMUIR, 2015, 31 (30) : 8205 - 8217
  • [8] Surface phase transitions in foams and emulsions
    Denkov, Nikolai
    Tcholakova, Slavka
    Cholakova, Diana
    [J]. CURRENT OPINION IN COLLOID & INTERFACE SCIENCE, 2019, 44 : 32 - 47
  • [9] Dlugogorski B.Z., 2005, FIRE SAFETY SCI P 8, P719, DOI [DOI 10.3801/IAFSS.FSS.8-719, 10.3801/IAFSS.FSS.8-719]
  • [10] Bending: from thin interfaces to molecular films in microemulsions
    Dufreche, J. F.
    Zemb, Th
    [J]. CURRENT OPINION IN COLLOID & INTERFACE SCIENCE, 2020, 49 : 133 - 147