Aggregation behaviours and bactericidal activities of novel cationic surfactants functionalized with amides and ether groups

Cao, Guangzhou; Guo, Xiangfeng; Jia, Lei; Tian, Xuhua

doi:10.1039/c4ra14645j

Cited by 33 publications

(24 citation statements)

References 48 publications

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“…The maximum excess surface concentration ( Γ max ) and the area occupied by a single amphiphile molecule at the air/water interface ( A min ) can be calculated by the Gibbs adsorption isotherm [Eq. and ], which reflects the arrangement of surfactant molecules at the air/solution interface (Cao et al, ). An increase in A min or a decrease in Γ max means a denser arrangement of surfactant molecules at the surface of the solution (Gao et al, ; Olutaş and Acımış, ; Shi et al, ).…”

Section: Resultsmentioning

confidence: 99%

Synthesis, Surface Properties, and Antibacterial Activity of Novel Ester‐Containing Cationic Silicone Surfactants and Their Utilization as Fabric‐Finishing Agents

Wei

Cheng

Zhang

et al. 2018

J Surfact & Detergents

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In this study, a series of cationic silicone surfactants SiQC n Cl containing ester groups and double longchain alkyls (n = 9, 11, 13, 15, and 17) were synthesized by microwave irradiation and characterized using infrared Fourier transform (FTIR), 1 H nuclear magnetic resonance ( 1 H NMR), and thermogravimetric analysis (TGA). Surface activity and adsorption of these surfactants were investigated by measuring the equilibrium surface tension. The critical micelle concentration (CMC) decreased with increasing alkyl length of SiQC n Cl at 25 C and so did the corresponding surface tension at the CMC (γ CMC ). The aggregation behavior in aqueous solutions was also investigated systemically through transmission electron microscopy (TEM) and dynamic light scattering (DLS). Spherical or ellipsoidal-like aggregates with diameters ranging from 300 to 900 nm were observed. It is also shown that the cationic silicone surfactants exhibit certain antibacterial properties against Staphylococcus aureus but slightly poor to Escherichia coli. The morphological structure of SiQC 15 Cl-treated cotton fabrics was observed using scanning electron microscopy (SEM), which showed that the surface became neat and smooth. What is more, the finished cotton fabrics maintained some antibacterial properties with improved softness, which may provide a more comfortable and healthy lifestyle. This work may also be helpful to the design and application of functional cationic silicone surfactants. Keywords Cationic silicone surfactants Á Ester bonds Á Aggregation behavior Á Performance test Á Fabric finishing J Surfact Deterg (2019) 22: 285-299. The morphologies of the aggregates for SiQC n Cl in aqueous solutions (10 mmol L −1 ) were examined via a JSM-7001F TEM (JEOL, Japan) at 20 kV. The samples were 286 J Surfact Deterg J Surfact Deterg (2019) 22: 285-299

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Section: Resultsmentioning

confidence: 99%

Synthesis, Surface Properties, and Antibacterial Activity of Novel Ester‐Containing Cationic Silicone Surfactants and Their Utilization as Fabric‐Finishing Agents

Wei

Cheng

Zhang

et al. 2018

J Surfact & Detergents

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“…The surface tension recorded was related to the force required to li the ring from the surface of the airliquid interface. 37 Measurements were performed at 298.15 AE 0.10 K until successive values agreed to within 0.2 mN m À1 .…”

Section: Surface Tension Measurementsmentioning

confidence: 99%

“…This is due to the saturation of the air-liquid interface with ILs molecules. 37 The UV spectrometric technique is also an easy method to determine the CMC of surfactants. 42,43 In this method, pyrene was used as absorption probe.…”

Section: Surface Chemical Parameter Calculationmentioning

confidence: 99%

“…The ratio of CMC/C 20 can evaluate the structural factors and various microenvironments in the process of adsorption or micellization. 37 The greater the CMC/C 20 is, the greater tendency of the amphiphile has to reduce surface tension of the system. ) and the minimum surface area (A min ), two additional important parameters of surfactants which reect the molecular arrangement of ILs molecules at the air-liquid interface, were estimated by Gibbs adsorption isotherm.…”

Section: Surface Activity Of [C N Mpy][br]mentioning

confidence: 99%

“…ILs molecules with longer alkyl chains form more compact monolayers that occupy less area. 37 It is interesting to nd that the trend for G max value of [ head groups. 19 In addition, for [C n mpy][Br], the relationship of minimum surface area per amphiphilic molecule versus the number of carbon atoms in the alkyl chain is linear, which can be described by a 0 ¼ 1.519 À 0.0515n.…”

Section: Surface Activity Of [C N Mpy][br]mentioning

confidence: 99%

See 2 more Smart Citations

Micellization, surface activities and thermodynamics study of pyridinium-based ionic liquid surfactants in aqueous solution

Gao

Huang

et al. 2019

RSC Adv.

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Adsorption and Aggregation Behavior in Aqueous Solution of Tetrasiloxane‐based Carboxylate Surfactants via “Thiol‐ene” Photochemical Reaction

Meng

Wang

et al. 2023

ChemPhysChem

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Anionic silicone surfactants have long been a neglected field. In this paper three anionic silicone surfactants were synthesized first time from dichloromethylvinylsilane through hydrolysis‐condensation, “thiol‐ene” photo‐ chemical and then salting reaction. The critical aggregate concentration (CAC), surface tension, minimum surface area per surfactant molecule and surface pressure at CAC were studied by both surface tension and electrical conductivity. The results showed that they had significant surface activity at the gas/liquid interface and were capable to reduce the surface tension of water to approximately 20 mN m−1. The results of transmission electron microscopy showed that the three silicone surfactants self‐assembled into spherical aggregates of uniform size in aqueous solution above the CAC. The dynamic light scattering results demonstrated that the size of the aggregates was determined to be in the range from 60 to 300 nm at 0.05 mol L−1 and the order of the size of the aggregates is (Me3SiO)3SiCO2Li<(Me3SiO)3SiCO2Na<(Me3SiO)3SiCO2K.

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Aggregation behaviours and bactericidal activities of novel cationic surfactants functionalized with amides and ether groups

Abstract: Novel cationic surfactants exhibit high surface activity, interesting aggregation behaviors in aqueous solution and excellent bacterial activity.

Cited by 33 publications

References 48 publications

Synthesis, Surface Properties, and Antibacterial Activity of Novel Ester‐Containing Cationic Silicone Surfactants and Their Utilization as Fabric‐Finishing Agents

Synthesis, Surface Properties, and Antibacterial Activity of Novel Ester‐Containing Cationic Silicone Surfactants and Their Utilization as Fabric‐Finishing Agents

Micellization, surface activities and thermodynamics study of pyridinium-based ionic liquid surfactants in aqueous solution

Adsorption and Aggregation Behavior in Aqueous Solution of Tetrasiloxane‐based Carboxylate Surfactants via “Thiol‐ene” Photochemical Reaction

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