Influence of functional groups and substituents on the adsorption of aromatic non-ionic surfactants at the Hg/ethylene glycol interface

1991 ◽  
Vol 87 (20) ◽  
pp. 3399 ◽  
Author(s):  
Jondo I. Japaridze ◽  
Shukri S. Japaridze ◽  
Nely A. Abuladze ◽  
Achille De Battisti ◽  
Sergio Trasatti
Keyword(s):  
Ethylene Glycol ◽  
Functional Groups ◽  
Ionic Surfactants

Novel poly(ethylene glycol) monomers bearing diverse functional groups

2010 ◽  
Vol 48 (23) ◽  
pp. 5468-5478 ◽  
Author(s):  
Dana M. Mizrahi ◽  
Melany Omer-Mizrahi ◽  
Jenny Goldshtein ◽  
Nataly Askinadze ◽  
Shlomo Margel
Keyword(s):  
Ethylene Glycol ◽  
Functional Groups ◽  
Poly Ethylene Glycol ◽  
Poly Ethylene

scholarly journals Effect of Increased Ionic Liquid Uptake via Thermal Annealing on Mechanical Properties of Polyimide-Poly(ethylene glycol) Segmented Block Copolymer Membranes

Molecules ◽  
2021 ◽  
Vol 26 (8) ◽  
pp. 2143
Author(s):  
Gokcen A. Ciftcioglu ◽  
Curtis W. Frank
Keyword(s):  
Ionic Liquid ◽  
Block Copolymer ◽  
Ethylene Glycol ◽  
Functional Groups ◽  
Water Retention ◽  
Proton Exchange ◽  
Poly Ethylene Glycol ◽  
Practical Applications ◽  
Different Temperatures ◽  
Poly Ethylene

Proton exchange membranes (PEMs) suffer performance degradation under certain conditions—temperatures greater than 80 °C, relative humidity less than 50%, and water retention less than 22%. Novel materials are needed that have improved water retention, stability at higher temperatures, flexibility, conductivity, and the ability to function at low humidity. This work focuses on polyimide-poly(ethylene glycol) (PI-PEG) segmented block copolymer (SBC) membranes with high conductivity and mechanical strength. Membranes were prepared with one of two ionic liquids (ILs), either ethylammonium nitrate (EAN) or propylammonium nitrate (PAN), incorporated within the membrane structure to enhance the proton exchange capability. Ionic liquid uptake capacities were compared for two different temperatures, 25 and 60 °C. Then, conductivities were measured for a series of combinations of undoped or doped unannealed and undoped or doped annealed membranes. Stress and strain tests were performed for unannealed and thermally annealed undoped membranes. Later, these experiments were repeated for doped unannealed and thermally annealed. Mechanical and conductivity data were interpreted in the context of prior small angle X-ray scattering (SAXS) studies on similar materials. We have shown that varying the compositions of polyimide-poly(ethylene glycol) (PI-PEG) SBCs allowed the morphology in the system to be tuned. Since polyimides (PI) are made from the condensation of dianhydrides and diamines, this was accomplished using components having different functional groups. Dianhydrides having either fluorinated or oxygenated functional groups and diamines having either fluorinated or oxygenated diamines were used as well as mixtures of these species. Changing the morphology by creating macrophase separation elevated the IL uptake capacities, and in turn, increased their conductivities by a factor of three or more compared to Nafion 115. The stiffness of the membranes synthesized in this work was comparable to Nafion 115 and, thus, sufficient for practical applications.

A new application of Krafft point concept: an ultraviolet-shielded surfactant switchable window

2020 ◽  
Vol 56 (39) ◽  
pp. 5315-5318 ◽  
Author(s):  
Yihan Liu ◽  
Yiyi Guo ◽  
Zhuo Zhang ◽  
Zhaohui Huang ◽  
Ping Qi ◽  
...  
Keyword(s):  
Ethylene Glycol ◽  
Krafft Point ◽  
Ionic Surfactants ◽  
Smart Windows ◽  
Uv Shielding ◽  
Responsive Gels ◽  
Mixed Water

We report thermo-responsive gels of polyacrylamide (PAAm) with ionic surfactants in mixed water and ethylene glycol (W–EG) solvents as smart windows to solubilize ultraviolet absorbents for UV shielding materials.

Ionic-surfactants-based thermotropic liquid crystals

2019 ◽  
Vol 21 (28) ◽  
pp. 15256-15281 ◽  
Author(s):  
Zhaohui Huang ◽  
Ping Qi ◽  
Yihan Liu ◽  
Chunxiao Chai ◽  
Yitong Wang ◽  
...  
Keyword(s):  
Liquid Crystals ◽  
Functional Groups ◽  
Electrostatic Interaction ◽  
Ionic Surfactants ◽  
Thermotropic Liquid Crystals

Ionic surfactants can be combined with various functional groups through electrostatic interaction, resulting in a series of thermotropic liquid crystals (TLCs).

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