Accession Number:

AD1111148

Title:

Environmentally Friendly Surfactants for Foams with Low Fuel Permeability Needed for Effective Pool Fire Suppression

Descriptive Note:

[Technical Report, Memorandum Report]

Corporate Author:

NAVAL RESEARCH LAB WASHINGTON DC

Report Date:

2020-10-05

Pagination or Media Count:

148

Abstract:

We conducted bench scale experiments, computational modeling, large scale testing, and collaboration with industry to develop fluorine free aqueous foam for effective pool fire suppression to replace Aqueous Film Forming Foam AFFF. We invented a siloxane formulation containing commercial trisiloxanepolyoxyetylene and alkylpolyglycoside APG that suppressed heptane fire effectively 60 of AFFF due to synergistic effects reducing foam degradation by heptane. However, the siloxane is less effective on gasoline fire due to its extraction by the fuel. By performing surfactant synthesis, we varied the oxyethylene size and head and tail sizes of the APG competition between increased synergism and decreased amphiphilicity might have limited the improvements in foam stability. An understanding of the synergistic mechanisms and a more efficient design of surfactant structures are needed to improve fire suppression involving different fuels.

Descriptors:

Subject Categories:

  • Fuels

Distribution Statement:

[A, Approved For Public Release]