scholarly journals pH-Responsive Rheological Properties and Microstructure Transition in Mixture of Anionic Gemini/Cationic Monomeric Surfactants

Molecules ◽  
2021 ◽  
Vol 26 (16) ◽  
pp. 5013
Author(s):  
Maozhang Tian ◽  
Xi Chen ◽  
Xinyuan Zou ◽  
Yuchen Qian ◽  
Zhang Liu ◽  
...  

Surfactant aggregates have long been considered as a tool to improve drug delivery and have been widely used in medical products. The pH-responsive aggregation behavior in anionic gemini surfactant 1,3-bis(N-dodecyl-N-propanesulfonate sodium)-propane (C12C3C12(SO3)2) and its mixture with a cationic monomeric surfactant cetyltrimethylammonium bromide (CTAB) have been investigated. The spherical-to-wormlike micelle transition was successfully realized in C12C3C12(SO3)2 through decreasing the pH, while the rheological properties were perfectly enhanced for the formation of wormlike micelles. Especially at 140 mM and pH 6.7, the mixture showed high viscoelasticity, and the maximum of the zero-shear viscosity reached 1530 Pa·s. Acting as a sulfobetaine zwitterionic gemini surfactant, the electrostatic attraction, the hydrogen bond and the short spacer of C12C3C12(SO3)2 molecules were all responsible for the significant micellar growth. Upon adding CTAB, the similar transition could also be realized at a low pH, and the further transformation to branched micelles occurred by adjusting the total concentration. Although the mixtures did not approach the viscosity maximum appearing in the C12C3C12(SO3)2 solution, CTAB addition is more favorable for viscosity enhancement in the wormlike-micelle region. The weakened charges of the headgroups in a catanionic mixed system minimizes the micellar spontaneous curvature and enhances the intermolecular hydrogen-bonding interaction between C12C3C12(SO3)2, facilitating the formation of a viscous solution, which would greatly induce entanglement and even the fusion of wormlike micelles, thus resulting in branched microstructures and a decline of viscosity.

Soft Matter ◽  
2018 ◽  
Vol 14 (22) ◽  
pp. 4445-4452 ◽  
Author(s):  
Wanli Kang ◽  
Yilu Zhao ◽  
Pengxiang Wang ◽  
Zhe Li ◽  
Xiaoyu Hou ◽  
...  

Responsive wormlike micelles (WLMs) constructed by different carboxylic acids are fascinating.


Soft Matter ◽  
2015 ◽  
Vol 11 (23) ◽  
pp. 4614-4620 ◽  
Author(s):  
Yujun Feng ◽  
Zonglin Chu

Rheological properties of wormlike micelles formed by a pseudo gemini surfactant EAMA and of those without the “gemini” character formed by UC22AMPM in the presence of hydrochloric acid (named EAHCl) have been investigated.


2011 ◽  
Vol 115 (12) ◽  
pp. 2937-2946 ◽  
Author(s):  
Rekha Goswami Shrestha ◽  
Kenichi Sakai ◽  
Hideki Sakai ◽  
Masahiko Abe

2020 ◽  
Vol 68 (37) ◽  
pp. 10063-10070
Author(s):  
Zhaolan Zhai ◽  
Shengfeng Ye ◽  
Xinyan Yan ◽  
Zhanqian Song ◽  
Shibin Shang ◽  
...  

2019 ◽  
Vol 61 (2) ◽  
pp. 215-225 ◽  
Author(s):  
Alexander L. Kwiatkowski ◽  
Vyacheslav S. Molchanov ◽  
Olga E. Philippova

Soft Matter ◽  
2016 ◽  
Vol 12 (20) ◽  
pp. 4549-4556 ◽  
Author(s):  
Xuepeng Wu ◽  
Yining Wu ◽  
Shuai Yang ◽  
Mingwei Zhao ◽  
Mingwei Gao ◽  
...  

Author(s):  
Yujun Feng ◽  
Zonglin Chu ◽  
Cécile A. Dreiss

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