Surface and thermal properties of synthesized cationic poly(ethylene oxide) gemini surfactants: the role of the spacer

Hussain, Syed Muhammad Shakil; Kamal, Muhammad Shahzad; Sølling, Theis I.; Murtaza, Mobeen; Fogang, Lionel Talley

doi:10.1039/c9ra06577f

Cited by 25 publications

(16 citation statements)

References 32 publications

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“…Because earlier reports suggested that surfactants can reduce the clay swelling, however, most of the surfactants degrade at highsalinity and high-temperature conditions. However, these surfactants have shown excellent thermal stability and salt resistance in high-temperature and high-salinity conditions which has been reported earlier in our previous publications (Hussain et al, 2019b). The addition of ethoxy groups increase their salt tolerance and make surfactant soluble in high-salinity brines.…”

Section: Introductionmentioning

confidence: 54%

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Clay Swelling Inhibition Using Novel Cationic Gemini Surfactants with Different Spacers

Murtaza

Kamal

Hussain

et al. 2020

J Surfact & Detergents

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Hydration of shale formation by water‐based drilling fluids leads to several problems, such as the collapse of boreholes, tight holes, and stuck pipe, which may impede further drilling and time loss in rectifying the problems, leading to heavy economic losses. This study reports the development of new gemini cationic surfactants as shale‐swelling inhibitors. These gemini surfactants are structurally similar but differ in terms of the spacer group. Saturated butyl group (GS1) and unsaturated 2‐butenyl (GS2) and 2‐butynyl (GS3) were introduced as spacer groups of gemini surfactants. To assess the performance of new gemini cationic surfactants, two reliable clay sources were considered. The first clay is from an unconventional formation and the second clay is sodium bentonite. The inhibition characteristics of gemini surfactants were evaluated using dynamic swelling, hot rolling, rheology, and filtration experiments. Different formulations based on commercially available solutions for shale‐swelling inhibitors were applied and compared with cationic shale inhibitors. It was observed that the new gemini cationic surfactants with different spacers (saturated and unsaturated) reduced the shale swelling by different percentages. The GS2 surfactant, containing an unsaturated double bond proved to be a good swelling inhibitor as compared to GS1 and GS3. It also showed acceptable performance compared with the common shale inhibitor (KCl) used in the industry. The addition of surfactant has less impact on the rheological properties as compared to KCl. The filtration properties of the base mud were unchanged when surfactants were used. However, the commercial inhibitor, KCl, significantly increased the filtration volume that is associated with the disintegration of the clay. In summary, unlike commercial inhibitors, the synthesized surfactants reduced the clay swelling without affecting the other properties of the drilling fluids.

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Section: Introductionmentioning

confidence: 54%

“…Figure 1 shows the synthetic scheme and structure of the synthesized surfactants. Further details of synthetic methodology and characterization are published in our previous publication (Hussain et al, 2019b). These surfactants have the same functionalities except the spacer group.…”

Section: Materials and Experimental Program Materialsmentioning

confidence: 99%

Clay Swelling Inhibition Using Novel Cationic Gemini Surfactants with Different Spacers

Murtaza

Kamal

Hussain

et al. 2020

J Surfact & Detergents

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“…Formally, geminis that are asymmetric (e.g., those with a lysine spacer) are classified as geminoid or gemini-like surfactans [ 36 , 37 ]. Hydrophobic fragments (tails) used in gemini surfactants vary in length (usually 8–20), structure (straight or branched chain) [ 38 ], and saturation [ 39 ]; tails can be fluorinated [ 40 ], contain poly(ethylene oxide) [ 41 ], cholesterol [ 42 ], or aromatic backbones [ 43 ]. Gemini surfactants are an intriguing group of compounds owing to their increased solubility in water, superior surface tension reduction power, reduced proximity between hydrophobic groups, lower critical micellar concentration (by one or more magnitudes), and superior wetting characteristics as compared to the corresponding single chain (monomeric) surfactants, which makes them convenient candidates for pharmaceuticals formulations [ 44 ].…”

Section: Introductionmentioning

confidence: 99%

Biological and Physico-Chemical Characteristics of Arginine-Rich Peptide Gemini Surfactants with Lysine and Cystine Spacers

Neubauer

Jaśkiewicz

Bauer

et al. 2021

IJMS

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Ultrashort cationic lipopeptides (USCLs) and gemini cationic surfactants are classes of potent antimicrobials. Our recent study has shown that the branching and shortening of the fatty acids chains with the simultaneous addition of a hydrophobic N-terminal amino acid in USCLs result in compounds with enhanced selectivity. Here, this approach was introduced into arginine-rich gemini cationic surfactants. l-cystine diamide and l-lysine amide linkers were used as spacers. Antimicrobial activity against planktonic and biofilm cultures of ESKAPE (Enterococcus faecium, Staphylococcus aureus, Klebsiella pneumoniae, Acinetobacter baumannii, Pseudomonas aeruginosa, and Enterobacter spp.) strains and Candida sp. as well as hemolytic and cytotoxic activities were examined. Moreover, antimicrobial activity in the presence of human serum and the ability to form micelles were evaluated. Membrane permeabilization study, serum stability assay, and molecular dynamics were performed. Generally, critical aggregation concentration was linearly correlated with hydrophobicity. Gemini surfactants were more active than the parent USCLs, and they turned out to be selective antimicrobial agents with relatively low hemolytic and cytotoxic activities. Geminis with the l-cystine diamide spacer seem to be less cytotoxic than their l-lysine amide counterparts, but they exhibited lower antibiofilm and antimicrobial activities in serum. In some cases, geminis with branched fatty acid chains and N-terminal hydrophobic amino acid resides exhibited enhanced selectivity to pathogens over human cells.

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“…In this sense, Hussain et al studied the thermal degradation of three cationic poly(ethylene oxide) gemini surfactants containing flexible and rigid spacers. The thermal gravimetric analysis showed a degradation temperature higher than that observed in an oilfield (90 • C) [102].…”

Section: Applicationsmentioning

confidence: 63%

Gemini and Bicephalous Surfactants: A Review on Their Synthesis, Micelle Formation, and Uses

Guerrero-Hernández¹,

Meléndez‐Ortiz²,

Cortez-Mazatan³

et al. 2022

IJMS

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The use of surfactants in polymerization reactions is particularly important, mainly in emulsion polymerizations. Further, micelles from biocompatible surfactants find use in pharmaceutical dosage forms. This paper reviews recent developments in the synthesis of novel gemini and bicephalous surfactants, micelle formation, and their applications in polymer and nanoparticle synthesis, oil recovery, catalysis, corrosion, protein binding, and biomedical area, particularly in drug delivery.

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Surface and thermal properties of synthesized cationic poly(ethylene oxide) gemini surfactants: the role of the spacer

Abstract: Synthesis of new cationic poly(ethylene oxide) gemini surfactants containing flexible and rigid spacer groups to tolerate harsh reservoir condition.

Cited by 25 publications

References 32 publications

Clay Swelling Inhibition Using Novel Cationic Gemini Surfactants with Different Spacers

Clay Swelling Inhibition Using Novel Cationic Gemini Surfactants with Different Spacers

Biological and Physico-Chemical Characteristics of Arginine-Rich Peptide Gemini Surfactants with Lysine and Cystine Spacers

Gemini and Bicephalous Surfactants: A Review on Their Synthesis, Micelle Formation, and Uses

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