Characterization of Mixed Micelles of SDS and a Sugar-Based Nonionic Surfactant as a Variable Reaction Medium

2001 ◽  
Vol 105 (31) ◽  
pp. 7465-7473 ◽  
Author(s):  
Barney L. Bales ◽  
Radha Ranganathan ◽  
P. C. Griffiths
Keyword(s):  
Nonionic Surfactant ◽  
Mixed Micelles ◽  
Reaction Medium

Preparation and characterization of the ion-fixed mixed micelles with superior stability

2015 ◽  
Vol 489 (1-2) ◽  
pp. 268-276 ◽  
Author(s):  
Yang Li ◽  
Yang Fu ◽  
Hongyu Guo ◽  
Lixue Zhang ◽  
Lingling Huang ◽  
...  
Keyword(s):  
Mixed Micelles

scholarly journals Synthesis, Characterization of Chitosan-Aluminum Oxide Nanocomposite for Green Synthesis of Annulated Imidazopyrazol Thione Derivatives

Polymers ◽  
2021 ◽  
Vol 13 (7) ◽  
pp. 1160
Author(s):  
Abir S. Abdel-Naby ◽  
Sara Nabil ◽  
Sarah Aldulaijan ◽  
Ibtisam M. Ababutain ◽  
Azzah I. Alghamdi ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Aluminum Oxide ◽  
Reaction Medium ◽  
Thiol Group ◽  
Docking Studies ◽  
Significant Loss ◽  
Gram Negative Bacteria ◽  
Organic Catalyst ◽  
Group 1

Chitosan-aluminum oxide nanocomposite was synthesized, characterized, and used as a green heterogeneous catalyst to synthesize novel imidazopyrazolylthione derivatives. Nanocomposite polymeric material was characterized by EDS-SEM and XRD. The powerful catalytic activity, and its base character of the nanocomposite, was used to synthesize imidazopyrazolylthione (1) in a good yield compared to traditional cyclocondensation synthesis. Using the nanocomposite catalyst, substitution of the thiol group (1) afforded the corresponding thiourea (2) and the corresponding ester (3). The efficiency of the nanocomposite over the traditional base organic catalyst, Et3N and NaOH, makes it an effective, economic, and reproducible nontoxic catalyst. Moreover, the heterogeneous nanocomposite polymeric film was easily isolated from the reaction medium, and recycled up to four times, without a significant loss of its catalytic activity. The newly synthesized derivatives were screened as antibacterial agents and showed high potency. Molecular docking was also performed for a more in-depth investigation. The results of the docking studies have demonstrated that the docked compounds have strong interaction energies with both Gram-positive and Gram-negative bacteria.

scholarly journals Design and characterization of oil-in-water nanoemulsion for enhanced oil recovery stabilized by amphiphilic copolymer, nonionic surfactant, and LAPONITE® RD

RSC Advances ◽  
2021 ◽  
Vol 11 (4) ◽  
pp. 1952-1959
Author(s):  
Yi Zhao ◽  
Fangfang Peng ◽  
Yangchuan Ke
Keyword(s):  
Particle Size ◽  
Nonionic Surfactant ◽  
Enhanced Oil Recovery ◽  
Oil Recovery ◽  
Small Particle ◽  
Amphiphilic Copolymer ◽  
Good Stability ◽  
Small Particle Size ◽  
Oil In Water

Emulsion with small particle size and good stability stabilized by emulsifiers was successfully prepared for EOR application.

Full chromatographic characterization of nonionic surfactant polyoxyethylene glycerol trioleate

1997 ◽  
Vol 72 (3) ◽  
pp. 185-189 ◽  
Author(s):  
A. Hensel ◽  
M. Rischer ◽  
D. Di Stefano ◽  
I. Behr ◽  
E. Wolf-Heuss
Keyword(s):  
Nonionic Surfactant ◽  
Chromatographic Characterization

scholarly journals Synthesis and Characterization of Pd exchanged MMT Clay for Mizoroki-Heck Reaction

2018 ◽  
Vol 16 (1) ◽  
pp. 605-613 ◽  
Author(s):  
Vivek Srivastava
Keyword(s):  
Heck Reaction ◽  
Exchange Process ◽  
Reaction Medium ◽  
Analytical Techniques ◽  
Catalyst Loading ◽  
Catalyst Recycling ◽  
Mmt Clay ◽  
Vinyl Phosphonates ◽  
Low Catalyst Loading

AbstractWe successfully synthesized Pd@MMT clay using a cation exchange process. We characterized all the synthesized Pd@MMT clays using sophisticated analytical techniques before testing them as a heterogeneous catalyst for the Mizoroki - Heck reaction (mono and double). The highest yield of the Mizoroki-Heck reaction product was recovered using thermally stable and highly reactive Pd@ MMT-1 clay catalyst in the functionalized ionic liquid reaction medium. We successfully isolated 2-aryl-vinyl phosphonates (mono-Mizoroki-Heck reaction product) and 2,2-diaryl-vinylphosphonates (double-Mizoroki-Heck reaction product) using aryl halides and dialkyl vinyl phosphonates in higher yields. The low catalyst loading, easy recovery of reaction product and 8 times catalyst recycling are the major highlights of this proposed protocol.

Preparation and characterization of bio-organoclays using nonionic surfactant

Adsorption ◽  
2015 ◽  
Vol 22 (2) ◽  
pp. 105-116 ◽  
Author(s):  
Ilaria Calabrese ◽  
Giuseppe Cavallaro ◽  
Giuseppe Lazzara ◽  
Marcello Merli ◽  
Luciana Sciascia ◽  
...  
Keyword(s):  
Nonionic Surfactant

scholarly journals Prospects for the use of mixed micellar structures as a template in synthesis of MCM-41-type silicas

2021 ◽  
pp. 79-89
Author(s):  
N.V. Roik ◽  
◽  
L.O. Belyakova ◽  
М.О. Dziazko
Keyword(s):  
Azo Dye ◽  
Cetyltrimethylammonium Bromide ◽  
Mixed Micelles ◽  
Hydrophobic Interactions ◽  
Sol Gel ◽  
Standard Free Energy ◽  
Reaction Medium ◽  
Total Pore Volume ◽  
Methyl Red ◽  
Sol Gel Synthesis

Formation of mixed micelles assisted by cetyltrimethylammonium bromide and methyl red was studied by means of conductometric and spectrophotometric methods. It follows from the analysis of conductometric dependences that the addition of azo dye leads to a decrease in critical micelle concentration of a long-chain quaternary ammonium salt. The respective thermodynamic parameters were calculated. The process of mixed micelles formation was stated to be spontaneous and the solubilization of azo dye by micelles of cetyltrimethylammonium bromide is profitable in terms of energy and accompanied by an increase in degrees of freedom of the system. Based on the data of spectrophotometric study of methyl red solutions in the presence of cetyltrimethylammonium bromide, the values of stability constant, partition coefficient and change in the standard free energy of methyl red distribution between aqueous and micellar medium were calculated. It was found that electrostatic and hydrophobic interactions arising between azo dye and cetyltrimethylammonium bromide molecules cause the orientation of methyl red from the shell towards the center of the micelles. It was shown that mixed micelles can be used as a template in sol-gel synthesis of mesoporous aminosilica of MSM-41 type. The results of low-temperature nitrogen adsorption-desorption and X-ray analysis revealed that the introduction of methyl red as a part of mixed micelles into the reaction medium of sol-gel synthesis causes substantial increase in specific surface area and total pore volume, noticeable reduction of pore diameter, thereby contributing to the formation of silica material with a pronounced long-range ordered mesoporous structure.

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