Asset Details
Do you wish to reserve the book?
Salt effects on the aggregation behavior of tripolar zwitterionic surfactants with different inter-charge spacers in aqueous solution
Hey, we have placed the reservation for you!
By the way, why not check out events that you can attend while you pick your title.
Oops! Something went wrong.
Looks like we were not able to place the reservation. Kindly try again later.
Are you sure you want to remove the book from the shelf?
Salt effects on the aggregation behavior of tripolar zwitterionic surfactants with different inter-charge spacers in aqueous solution
Do you wish to request the book?
Salt effects on the aggregation behavior of tripolar zwitterionic surfactants with different inter-charge spacers in aqueous solution
Please be aware that the book you have requested cannot be checked out. If you would like to checkout this book, you can reserve another copy
We have requested the book for you!
Your request is successful and it will be processed during the Library working hours. Please check the status of your request in My Requests.
Oops! Something went wrong.
Looks like we were not able to place your request. Kindly try again later.
Journal Article
Salt effects on the aggregation behavior of tripolar zwitterionic surfactants with different inter-charge spacers in aqueous solution
2013
Overview
Salt effects on the aggregation behavior of tripolar zwitterionic surfactants in aqueous solutions have been investigated using surface tension, dynamic light scattering (DLS), freeze-fracture transmission electron microscopy (FF-TEM), and
1
H NMR. The tripolar zwitterionic surfactants with different inter-charge spacers are [C
14
H
29
(CH
3
)
2
N
+
C
s
N
+
(CH
3
)
2
CH
2
CH
2
CH
2
SO
3
−
]Br
−
(C
14
C
s
Tri, C
s
= –(CH
2
)
2
–, –(CH
2
)
6
–, –(CH
2
)
10
–, and
p
-xylyl). It is found that the critical micelle concentration (CMC) values of the corresponding traditional zwitterionic surfactant C
14
H
29
(CH
3
)
2
N
+
CH
2
CH
2
CH
2
SO
3
−
(TPS) are almost constant with the increase of the NaBr concentration. However, the CMC values of C
14
C
s
Tri decrease sharply at a lower NaBr concentration and then level off at a higher NaBr concentration. Moreover, the decreasing extents of the CMC values for C
14
C
2
Tri, C
14
C
6
Tri, and C
14
C
px
Tri are very close, but more significant than that for C
14
C
10
Tri, suggesting that the self-assembly ability of the tripolar zwitterionic surfactants with a longer inter-charge spacer is less sensitive to NaBr. The DLS and FF-TEM results reveal that C
14
C
2
Tri, C
14
C
6
Tri, and C
14
C
px
Tri form micelles without NaBr and that the size slightly increases with the increase of NaBr concentration, whereas micelles and vesicles coexist for C
14
C
10
Tri and TPS without NaBr and then transfer to micelles upon the addition of NaBr. The salt-induced morphological transition for C
14
C
10
Tri is further studied using
1
H NMR. The addition of NaBr reduces both the electrostatic repulsion between the same charged ammoniums and the electrostatic attraction between the oppositely charged ammonium and sulfonate. Thus, the longer inter-charge spacer of C
14
C
10
Tri tends to be more bended and the sulfonate group becomes available to contact the ammonium, which promotes micellization.
Publisher
Springer-Verlag,Springer,Springer Nature B.V
