TY - JOUR
T1 - Common black film stability and synergetic adsorption in ionic−nonionic mixed surfactant systems
AU - Matsubara, H.
AU - Chida, K.
AU - Yoshimura, M.
AU - Aratono, M.
AU - Ikeda, N.
N1 - Funding Information:
This work was supported by JSPS KAKENHI Grant Numbers JP 2600434 and 17H02943 .
Publisher Copyright:
© 2019 Elsevier B.V.
PY - 2019/12/5
Y1 - 2019/12/5
N2 - In this paper, the thickness and stability of common black films (CBFs) in two ionic–nonionic mixed surfactant systems were compared based on the phase diagram of the adsorbed film. The mixed surfactant systems examined were (1) cetyltrimethylammonium chloride (CTAC) – n-dodecyl-β-D-maltoside (β-C12G2) and (2) lithium perfluorooctanesulfonate (LiFOS) – tetraethyleneglycolmonooctyl ether (C8E4) systems. When the attraction between the two surfactants in the adsorbed film was weak, the foam film collapsed as the observed bulk composition of the nonionic surfactant, X^2, became 0.09 in system (1). However, the CBF of system (2) was stable up to X^2 > 0.96 due to the strong synergism between the ionic and nonionic surfactants maintaining a high ionic surfactant composition in the adsorbed film, thus leading to a high surface charge density that stabilize the CBF.
AB - In this paper, the thickness and stability of common black films (CBFs) in two ionic–nonionic mixed surfactant systems were compared based on the phase diagram of the adsorbed film. The mixed surfactant systems examined were (1) cetyltrimethylammonium chloride (CTAC) – n-dodecyl-β-D-maltoside (β-C12G2) and (2) lithium perfluorooctanesulfonate (LiFOS) – tetraethyleneglycolmonooctyl ether (C8E4) systems. When the attraction between the two surfactants in the adsorbed film was weak, the foam film collapsed as the observed bulk composition of the nonionic surfactant, X^2, became 0.09 in system (1). However, the CBF of system (2) was stable up to X^2 > 0.96 due to the strong synergism between the ionic and nonionic surfactants maintaining a high ionic surfactant composition in the adsorbed film, thus leading to a high surface charge density that stabilize the CBF.
UR - http://www.scopus.com/inward/record.url?scp=85072022808&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85072022808&partnerID=8YFLogxK
U2 - 10.1016/j.colsurfa.2019.123932
DO - 10.1016/j.colsurfa.2019.123932
M3 - Article
AN - SCOPUS:85072022808
SN - 0927-7757
VL - 582
JO - Colloids and Surfaces A: Physicochemical and Engineering Aspects
JF - Colloids and Surfaces A: Physicochemical and Engineering Aspects
M1 - 123932
ER -