A class of efficient short-chain fluorinated catanionic surfactants

2016 ◽  
Vol 18 (5) ◽  
pp. 1234-1239 ◽  
Author(s):  
P. Verdia ◽  
H. Q. N. Gunaratne ◽  
T. Y. Goh ◽  
J. Jacquemin ◽  
M. Blesic
Keyword(s):  
Environmental Impact ◽  
Surface Activity ◽  
Short Chain ◽  
Fluorinated Surfactants ◽  
Catanionic Surfactants

A family of short-chain catanionic fluorinated surfactants with potential for reduced environmental impact, excellent surface activity and fluorine efficiency.

Nonionic Short-Chain Fluorinated Surfactants in the Fatliquoring of Chrome-Tanned Goat Skin

2020 ◽  
Vol 115 (7) ◽  
pp. 255-262
Author(s):  
Yichao Shen ◽  
Yong Jin ◽  
Shuangquan Lai ◽  
Liangjie Shi ◽  
Yutang Zhou ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Water Repellency ◽  
Short Chain ◽  
Fiber Morphology ◽  
Leather Industry ◽  
Fluorinated Surfactants ◽  
Surface Activities ◽  
Goat Skin ◽  
Measurement Results ◽  
Almost All

Surfactants as essential auxiliaries are used in almost all chemical processes in leather production. In this work, a series of nonionic short-chain fluorinated surfactants (Fn-Fn, where n = 2, 4, or 6) were successfully prepared and used as fatliquoring auxiliaries in the fatliquoring process of chrome-tanned goat skin. The chemical structure of these nonionic short-chain fluorinated surfactants was characterized by FTIR and the molecular weight was determined by GPC. The surface tension measurement results revealed that these three fluorinated surfactants showed excellent surface activities. The effect of type and dosage of Fn-Fn as well as fatliquoring temperature on fatliquoring properties of chrome-tanned goat skin were estimated by the softness and physical mechanical properties characteristic of resultant leather. The results revealed that the leather treated with 1 wt% F4-F4 at the fatliquoring temperature of 40oC showed the best overall performance, whose softness and physical mechanical properties were improved significantly. Moreover, the collagen fiber morphology and waterproof performance of leather treated with Fn-Fn were also investigated which showed that the addition of Fn-Fn in the fatliquoring process could promote the loosening of collagen fibers while effectively enhancing the water repellency of the leather surface. Therefore, such types of nonionic short-chain fluorinated surfactants are promising to be as desired fatliquoring auxiliaries in the leather industry.

CF3CF2CF2C(CF3)2-based fluorinated surfactants with high surface activity

2019 ◽  
Vol 73 (6) ◽  
pp. 1499-1508
Author(s):  
Ding Zhang ◽  
Min Sha ◽  
Renming Pan ◽  
Xiangyang Lin ◽  
Ping Xing ◽  
...  
Keyword(s):  
Surface Activity ◽  
High Surface ◽  
Fluorinated Surfactants ◽  
High Surface Activity

scholarly journals Adsorption of Equimolar Mixtures of Cationic and Anionic Surfactants at the Water/Hexane Interface

2020 ◽  
Vol 5 (1) ◽  
pp. 1
Author(s):  
Nenad Mucic ◽  
Jelena Skrbic ◽  
Sandra Bucko ◽  
Lidija Petrovic ◽  
Jaroslav Katona ◽  
...  
Keyword(s):  
Surface Activity ◽  
Ion Pairs ◽  
Short Chain ◽  
Strong Increase ◽  
Medium Chain ◽  
Medium Chain Length ◽  
Mixed Medium ◽  
Equilibrium Data ◽  
Cationic And Anionic Surfactants ◽  
Anionic And Cationic Surfactants

In mixed solutions of anionic and cationic surfactants, called catanionics, ion pairs are formed which behave like non-ionic surfactants with a much higher surface activity than the single components. In equimolar mixtures of NaCnSO4 and CmTAB, all surface-active ions are paired. For mixtures with n + m = const, the interfacial properties are rather similar. Catanionics containing one long-chain surfactant and one surfactant with medium chain length exhibit a strong increase in surface activity as compared with the single compounds. In contrast, catanionics of one medium- and one short chain surfactant have a surface activity similar to that of the medium-chain surfactant alone. Both the Frumkin model and the reorientation model describe the experimental equilibrium data equally well, while the adsorption kinetics of the mixed medium- and short-chain surfactants can be well described only with the reorientation model.

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