<i>Retracted</i>: Synthesis, Characterization and Surface Activities of Cationic Polysaccharide (Aloe) Schiff Base Surfactants

Zaky, Mohamed F.; Badawi, A. M.; Sabbah, Ibrahim El; Ghani, Reda A. Abdel; Hendawy, Mostafa E.

doi:10.1007/s11743-014-1661-7

Cited by 16 publications

(10 citation statements)

References 19 publications

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“…In the IR spectra of 1a-1c, peaks for C-N stretching vibration at 1250-1000 cm -1 were detected. The complete disappearance of acid carbonyl stretching (-CH 2 -C=O-OH) at 1710 cm -1 and the appearance of amide carbonyl stretching (-CH 2 -C=O-NH) at 1643 cm -1 confirmed the formation of a condensed product [20]. In addition, two characteristic stretching bands at 2920 cm -1 , and 2850 cm -1 were seen corresponding to the methylene (-CH 2 -) and methyl (-CH 3 ) groups in the alkyl chain, respectively [21].…”

Section: Resultsmentioning

confidence: 88%

Synthesis, Characterization and Surface Properties of Amidosulfobetaine Surfactants Bearing Odd‐Number Hydrophobic Tail

Hussain

Animashaun

Kamal

et al. 2016

J Surfact & Detergents

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Three amidosulfobetaine surfactants were synthesized namely: 3‐(N‐pentadecanamidopropyl‐N,N‐dimethyl ammonium) propanesulfonate (2a); 3‐(N‐heptadecanamidopropyl‐N,N‐dimethyl ammonium) propanesulfonate (2b), and 3‐(N‐nonadecanamidopropyl‐N,N‐dimethyl ammonium) propanesulfonate (2c). These surfactants were prepared by direct amidation of commercially available fatty acids with 3‐(dimethylamino)‐1‐propylamine and subsequent reaction with 1,3‐propanesultone to obtain quaternary ammonium salts. The synthesized surfactants were characterized by IR, NMR and mass spectrometry. Thermogravimetric analysis (TGA) results showed that the synthesized surfactants have excellent thermal stability with no major thermal degradation below 300 °C. The critical micelle concentration (CMC) values of the surfactants 2a and 2b were found to be 2.2 × 10−4 and 1.04 × 10−4 mol/L, and the corresponding surface tension (γCMC) values were 33.14 and 34.89 mN m−1, respectively. The surfactants exhibit excellent surface properties, which are comparable with conventional surfactants. The intrinsic viscosity of surfactant (2b) was studied at various temperatures and concentrations of multi‐component brine solution. The plot of natural logarithm of relative viscosity versus surfactant concentration obtained from Higiro et al. model best fit the surfactant behavior. Due to good salt resistance, excellent surface properties and thermal stability, the synthesized surfactant has potential to be used in various oil field applications such as enhanced oil recovery, fracturing, acid diversion, and well stimulation.

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Section: Resultsmentioning

confidence: 88%

Synthesis, Characterization and Surface Properties of Amidosulfobetaine Surfactants Bearing Odd‐Number Hydrophobic Tail

Hussain

Animashaun

Kamal

et al. 2016

J Surfact & Detergents

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“…) of the zwitterionic surfactant before aging, the two stretching vibrations at 2920 and 2849 cm −1 were seen corresponding to the methyl (–CH 3 ) and methylene (–CH 2 –) groups in the hydrophobic tail (Dardir, Mohamed, Farag, Ramdan, & Fayad, ; El‐Lateef, Abo‐Riya, & Tantawy, ; Shaban, Aiad, Fetouh, & Maher, ). The stretching vibration of the carbonyl group was observed at 1641 cm −1 and C–N stretching vibration was detected at 1070 cm −1 (Zaky, Badawi, El Sabbah, Ghani, & Hendawy, ). The peak at 3416 cm −1 corresponds to the amide N–H stretching, and the weak absorption at 3005 cm −1 corresponds to the double bond (=CH) in the unsaturated surfactant tail.…”

Section: Resultsmentioning

confidence: 99%

A Zwitterionic Surfactant Bearing Unsaturated Tail for Enhanced Oil Recovery in High‐Temperature High‐Salinity Reservoirs

Kamal

Hussain

Fogang

2018

J Surfact & Detergents

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High-temperature/high-salinity (HTHS) reservoirs contain a significant fraction of the world's remaining oil in place and are potential candidates for enhanced oil recovery (EOR). Selection of suitable surfactants for such reservoirs is a challenging task. In this work, two synthesized zwitterionic surfactants bearing a saturated and an unsaturated tail, namely 3-(N-stearamidopropyl-N,N-dimethyl ammonium) propanesulfonate and 3-(N-oleamidopropyl-N,N-dimethyl ammonium) propanesulfonate, respectively, were evaluated. The surfactant with the unsaturated tail showed excellent solubility in synthetic seawater (57,643 ppm) and in formation brine (213,734 ppm). However, the unsaturated surfactant with a saturated tail showed poor solubility, and therefore it was not evaluated further. The thermal stability of the synthesized unsaturated surfactant solution in seawater was evaluated by heating the solution at 90 C in a sealed aging tube for 2 weeks. The thermal stability of the unsaturated surfactant was confirmed by FTIR and NMR analysis of the aged samples at such harsh conditions. The critical micelle concentration (CMC) of the synthesized unsaturated surfactant in seawater was 1.02 × 10 −4 mol L −1 , while the surface tension at CMC was 30 mN m −1 . The synthesized unsaturated surfactant was able to reduce the oil-water interfacial tension tõ 10 −1 mN m −1 at different conditions. A commercial copolymer of acrylamide and 2-acrylamido-2-methylpropane sulfonic acid (AM-AMPS) was tested for EOR applications in HTHS conditions. The addition of the synthesized unsaturated surfactant to the AM-AMPS copolymer increased the viscosity of the system. The increase in oil recovery by injecting the unsaturated surfactant solution and the surfactant-polymer mixture in solution was 8 and 21%, respectively. The excellent properties of the synthesized unsaturated surfactant show that surfactants with an unsaturated tail can be an excellent choice for HTHS reservoirs.

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“…Surfactants (PQ14, PQ16 and PQ18) Cationic Thiol polyurethane surfactants (PQ14, PQ16 and PQ18) were prepared by refluxing equimolar amounts of thiol polyurethane (P) and tetradecyl, hexadecyl, octadecyl individually in a suitable amount of dimethyl formamide (DMF) for 20 h. The produced compounds were filtered off, washed by excess DMF, and dried under reduced pressure at 50°C to afford yellow to brown viscous liquids designated as: , PQ14, PQ16 and PQ18 (yield 82-89%) [11,12] (Figure 1).…”

Section: Preparation Of Cationic Thiol Polyurethanementioning

confidence: 99%

Synthesis, Surface Activities and Anti-Bacterial Activity of (Copper and Nickel) Nanoparticles Stabilized by Cationic Thiol Polyurethane Surfactants

Sabbah¹

2018

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A series of cationic polyurethane surfactant [PQ14, PQ16 and PQ18] were synthesized by the reaction of alkyl bromoacetate (namely: tetradecyl-, hexadecyl-and octadecyl bromoacetate) as quaternizing agents and modified polyurethane contains tertiary amine species. Modified polyurethane was prepared by the reaction of toluene diisocyanate (TDI) and Triethanol amine mono mercaptoacetate. Grinding method is used to synthesize copper and nickel nanoparticles which stabilized by Cationic Thiol polyurethane surfactants. The chemical structures of the prepared surfactants were confirmed using elemental analysis, FTIR, UV and 1 H-NMR spectroscopy. The molecular weight measurements of the prepared polymers showed that the segments of each polymer contain average 10 units of the urethane-Triethanol amine mercaptoacetate. The surface activities of the prepared surfactants including: surface tension (γ), effectiveness (π cmc), concentration at micelle formation (CMC), efficiency (Pc 20), maximum concentration at the interface (Γ max), average area occupied by each surfactant molecule at the interface at equilibrium (A min) of surfactants solutions were established at 25°C. The surface tension and the critical micelle concentration values of the prepared surfactants were gradually decreased by the gradual increase of their alkyl chain length. Antimicrobial activity of the synthesized cationic surfactants and their nanostructure with copper and nickel nanoparticles were evaluated against pathogenic bacteria and fungi. The antimicrobial activity showed the enhancement in the antimicrobial activity of the synthesized cationic surfactants in the nanostructures form.

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Retracted: Synthesis, Characterization and Surface Activities of Cationic Polysaccharide (Aloe) Schiff Base Surfactants

Cited by 16 publications

References 19 publications

Synthesis, Characterization and Surface Properties of Amidosulfobetaine Surfactants Bearing Odd‐Number Hydrophobic Tail

Synthesis, Characterization and Surface Properties of Amidosulfobetaine Surfactants Bearing Odd‐Number Hydrophobic Tail

A Zwitterionic Surfactant Bearing Unsaturated Tail for Enhanced Oil Recovery in High‐Temperature High‐Salinity Reservoirs

Synthesis, Surface Activities and Anti-Bacterial Activity of (Copper and Nickel) Nanoparticles Stabilized by Cationic Thiol Polyurethane Surfactants

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