scholarly journals Self-assembly of quaternary ammonium gemini surfactants in cyclohexane upon reinforcement by simple counterions

RSC Advances ◽  
2018 ◽  
Vol 8 (34) ◽  
pp. 18880-18888 ◽  
Author(s):  
Sheng-lu Deng ◽  
Jian-xi Zhao ◽  
Zhi-xiu Wen
Keyword(s):  
Quaternary Ammonium ◽  
Self Assembly ◽  
Gemini Surfactants ◽  
Salt Effects ◽  
Spacer Length

12-s-12/salt formed various reverse aggregates in cyclohexane dependent upon both spacer length and salt effects.

Self-assembly of cationic gemini surfactants, alkanediyl-bis-(dimethyldodecyl-ammonium bromide), in cyclohexane: effects of spacer length on their association into reverse lyotropic liquid crystalline or reverse vesicles

Soft Matter ◽  
2018 ◽  
Vol 14 (5) ◽  
pp. 734-741 ◽  
Author(s):  
Shenglu Deng ◽  
Jianxi Zhao
Keyword(s):  
Self Assembly ◽  
Liquid Crystalline ◽  
Gemini Surfactant ◽  
Gemini Surfactants ◽  
Ammonium Bromide ◽  
Spacer Length ◽  
Cationic Gemini Surfactants ◽  
Reverse Vesicles

An increase in the spacer length of the gemini surfactant 12-s-12 strongly influenced the aggregation of the surfactant in cyclohexane.

Coarse-grained molecular dynamics study on the self-assembly of Gemini surfactants: the effect of spacer length

2017 ◽  
Vol 19 (6) ◽  
pp. 4462-4468 ◽  
Author(s):  
Pan Wang ◽  
Shuai Pei ◽  
Muhan Wang ◽  
Youguo Yan ◽  
Xiaoli Sun ◽  
...  
Keyword(s):  
Molecular Dynamics ◽  
Self Assembly ◽  
Gemini Surfactants ◽  
Molecular Level ◽  
Underlying Mechanism ◽  
The Self ◽  
Coarse Grained ◽  
Spacer Length ◽  
Coarse Grained Molecular Dynamics

This work provides a molecular-level understanding of the underlying mechanism of the self-assembly of Gemini surfactants.

scholarly journals Synthesis of Novel Ethoxylated Quaternary Ammonium Gemini Surfactants for Enhanced Oil Recovery Application

Energies ◽  
2019 ◽  
Vol 12 (9) ◽  
pp. 1731 ◽  
Author(s):  
S. M. Shakil Hussain ◽  
Muhammad Shahzad Kamal ◽  
Mobeen Murtaza
Keyword(s):  
Surface Properties ◽  
Oil Recovery ◽  
Quaternary Ammonium ◽  
Gemini Surfactants ◽  
Deionized Water ◽  
Thermal Stabilities ◽  
Spacer Length ◽  
Suitable Material ◽  
Injection Water ◽  
Gravimetric Data

Two aspects are always considered in the design and development of new surfactants for oilfield application. One of them is that surfactant must be sufficiently stable at reservoir temperature and the other is the solubility of the surfactant in the injection water (usually seawater) and the formation brine. Most industrially applied surfactants undergo hydrolysis at elevated temperature and the presence of reservoir ions causes surfactant precipitation. In relevance to this, a novel series of quaternary ammonium gemini surfactants with different length of spacer group (C8, C10, and C12) was synthesized and characterized using FT-IR, 13C NMR, 1H NMR, and MALDI-TOF MS. The gemini surfactants were prepared by solvent-free amidation of glycolic acid ethoxylate lauryl ether with 3-(dimethylamino)-1-propylamine followed by reaction with dibromoalkane to obtain quaternary ammonium gemini surfactants. The gemini surfactants were examined by means of surface properties and thermal stabilities. The synthesized gemini surfactants showed excellent solubility in the formation brine, seawater, and deionized water without any precipitation for up to three months at 90 °C. Thermal gravimetric data revealed that all the gemini surfactants were decomposed above 227 °C, which is higher than the oilfield temperature (≥90 °C). The decrease in critical micelle concentration (CMC) and surface tension at CMC (γcmc) was detected by enhancing spacer length in the order C8 ˃ C10 ˃ C12 which suggested that the larger the spacer, the better the surface properties. Moreover, a further decrease in CMC and γcmc was noticed by enhancing temperature (30 °C ˃ 60 °C) and salinity (deionized water ˃ seawater). The current study provides a comprehensive investigation of quaternary ammonium gemini surfactants that can be further extended potentially to use as a suitable material for oilfield application.

Quaternary ammonium gemini surfactants having different spacer length as clay swelling inhibitors: Mechanism and performance evaluation

2020 ◽  
Vol 308 ◽  
pp. 113054 ◽  
Author(s):  
Mobeen Murtaza ◽  
Muhammad Shahzad Kamal ◽  
S.M. Shakil Hussain ◽  
Mohamed Mahmoud ◽  
Nadeem Ahmed Syed
Keyword(s):  
Performance Evaluation ◽  
Quaternary Ammonium ◽  
Gemini Surfactants ◽  
Spacer Length ◽  
Clay Swelling ◽  
And Performance

Self-assembled nano structures of cationic ester-containing gemini surfactants: The surfactant structure and salt effects

2013 ◽  
Vol 62 ◽  
pp. 201-210 ◽  
Author(s):  
Soheila Javadian ◽  
Hasti Aghdastinat ◽  
Alireza Tehrani-Bagha ◽  
Hussein Gharibi
Keyword(s):  
Gemini Surfactants ◽  
Salt Effects ◽  
Nano Structures ◽  
Self Assembled

Self-Assembly and Chiral Recognition of Chiral Cationic Gemini Surfactants

Langmuir ◽  
2018 ◽  
Vol 34 (43) ◽  
pp. 12924-12933 ◽  
Author(s):  
Lili Zhou ◽  
Jiling Yue ◽  
Yaxun Fan ◽  
Yilin Wang
Keyword(s):  
Self Assembly ◽  
Chiral Recognition ◽  
Gemini Surfactants ◽  
Cationic Gemini Surfactants
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