Dilational properties of gemini surfactant/polymer systems at the air–water surface

Guo, Yiguang; Chen, Ting; Zhao, Na; Shang, Yazhuo; Liu, Honglai

doi:10.1007/s00396-012-2801-0

Cited by 11 publications

(10 citation statements)

References 43 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Interfacial dilational rheology can provide information about the structure and composition of the adsorbed layer at the liquid–liquid interface. It has been proven to be a useful tool for exploring the interfacial adsorption behavior of polymers, surfactants, and polymer/surfactant mixtures …”

Section: Resultsmentioning

confidence: 99%

“…The HPAM/anionic surfactant mixtures have been widely applied to enhance oil recovery . The interfacial dilational modulus ( E ) of HPAM and mixed HPAM/SDBS systems are shown in Fig.…”

Section: Resultsmentioning

confidence: 99%

“…Oscillating pendant drop tensiometer set‐up. 1, optical bench; 2, integrated sphere light source (halogen lamp); 3, thermostated cell; 4, microsyringe; 5, DC motor; 6, telecentric gauging lens; 7, charge‐coupled device camera; 8, video monitor; and 9, computer (adapted from ).…”

Section: Methodsmentioning

confidence: 99%

See 2 more Smart Citations

Combined effects of polymer/surfactant mixtures on dynamic interfacial properties

Dong

Gao

et al. 2017

Asia-Pacific J Chem Eng

View full text Add to dashboard Cite

The present study investigated dynamic interfacial properties of similarly charged and oppositely charged polymer/surfactant mixtures at the oil-water interface. Partially hydrolyzed polyacrylamide (HPAM), sodium dodecylbenzenesulfonate (SDBS), and dodecyltrimethylammonium bromide (DTAB) were used to prepare polymer/surfactant mixtures. The effects of the molecular weight and concentration of the polymer, surface charge and concentration of the surfactant, pH, and ionic strength on the interfacial behavior of polymer/surfactant mixtures at the interface have been investigated. HPAM-1 exhibited a higher interfacial activity than HPAM-2. Strong binding interactions were observed between anionic HPAM and cationic DTAB. HPAM had a strong tendency to form more hydrophobic and interfacial activity complexes with DTAB. These complexes could remarkably affect the interfacial properties of polymer/surfactant mixtures at the interface. The adsorption kinetics of polymer/surfactant mixtures were controlled not only by the diffusion occurring between the bulk phase and the interface but also by the energetic and steric barriers generated by the electrostatic interactions and already formed adsorption layers. In addition, the dilational viscoelasticity of polymer/surfactant mixtures was significantly affected by the pH and ionic strength. The HPAM/DTAB mixtures with the addition of salts have higher E values than those of salt-free systems and HPAM/SDBS mixtures. Figure 5. Dynamic interfacial tension of (a) HPAM-1/DTAB and (b) HPAM-2/DTAB mixtures plotted against time for different DTAB concentrations and a constant HPAM concentration of 500 mg/L (temperature 25°C and pH 7).Figure 7. Effect of aqueous phase pH on the time-dependent interfacial dilational modulus of (a) HPAM-1/SDBS, (b) HPAM-2/SDBS, (c) HPAM-1 DTAB, and (d) HPAM-2/DTAB mixed adsorption layers at the heptane-water interface. The concentrations of polymer and surfactant were 500 and 20 mg/ L, respectively (temperature 25°C, pH 7, and frequency 0.1 Hz).Figure 8. Effect of ionic strength on the time-dependent interfacial dilational modulus of (a) HPAM-1/SDBS, (b) HPAM-2/SDBS, (c) HPAM-1/DTAB, and (d) HPAM-2/DTAB mixed adsorption layers at the heptane-water interface. The concentrations of polymer and surfactant were 500 and 20 mg/L, respectively (temperature 25°C, pH 7, and frequency 0.1 Hz).

show abstract

Section: Resultsmentioning

confidence: 99%

“…The HPAM/anionic surfactant mixtures have been widely applied to enhance oil recovery . The interfacial dilational modulus ( E ) of HPAM and mixed HPAM/SDBS systems are shown in Fig.…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Combined effects of polymer/surfactant mixtures on dynamic interfacial properties

Dong

Gao

et al. 2017

Asia-Pacific J Chem Eng

View full text Add to dashboard Cite

show abstract

“…Although the consumption of surfactants needs to be reduced in an attempt to protect ecosystems, decreases in surfactant concentrations have a direct impact on foam stability. Therefore, approaches to achieve high performance with small quantities of surfactant, including the introduction of additives into surfactant solutions to enhance surface-active properties, have been investigated. − In many cases, additives are proteins and synthetic polymers, such as bovine serum albumin and polyvinylpyrrolidone, respectively. − Electrostatic and hydrophobic interactions between surfactants and additives have been shown to improve interfacial rheological properties, thereby enhancing foam stability. From the viewpoint of environmental impact, green surfactants and green polymers have also been attracting attention in recent years …”

Section: Introductionmentioning

confidence: 99%

Effects of Polypropylene Glycol at Very Low Concentrations on Rheological Properties at the Air–Water Interface and Foam Stability of Sodium Bis(2-ethylhexyl)sulfosuccinate Aqueous Solutions

et al. 2020

View full text Add to dashboard Cite

The present study investigates the effects of very low concentrations of polypropylene glycol (PPG) on the rheological properties of sodium bis(2-ethylhexyl)sulfosuccinate (AOT) aqueous solutions at the surface for the precise control of foam properties. Langmuir trough experiments and Brewster angle microscopy (BAM) of the AOT monolayer on the surfaces of PPG aqueous solutions indicated that a very low concentration of PPG increased the number of AOT molecules at the surface. Viscoelastic behaviors at the surface and surface tension isotherms in mixed aqueous solutions of AOT and PPG revealed that AOT interacted with PPG in the surface and bulk phase. A modified Ross−Miles method was performed to assess the foam stabilities of AOT aqueous solutions with and without PPG. The stabilization of foam by PPG was attributed to the rheological properties of AOT aqueous solutions at the surface.

show abstract

“…In particular, two types of relaxation mechanisms were involved for the two relaxation times, one was the exchange of molecules between the polymer solution and the interface, the other was the conformational change of molecules in the interfacial layer. 37 In recent years, numerous investigations have been carried out on poly(ethylene glycol) (PEG) based block copolymers at the air-water interface. 4,5,[38][39][40][41] The surface-active nature of PEG promotes its spontaneous adsorption at the air-water interface and causes it to become more easily dissolved in the aqueous subphase.…”

Section: Introductionmentioning

confidence: 99%

Interfacial rheology and aggregation behaviour of amphiphilic CBABC-type pentablock copolymers at the air–water interface: effects of block ratio and chain length

Zang

et al. 2015

RSC Adv.

View full text Add to dashboard Cite

show abstract

Dilational properties of gemini surfactant/polymer systems at the air–water surface

Cited by 11 publications

References 43 publications

Combined effects of polymer/surfactant mixtures on dynamic interfacial properties

Combined effects of polymer/surfactant mixtures on dynamic interfacial properties

Effects of Polypropylene Glycol at Very Low Concentrations on Rheological Properties at the Air–Water Interface and Foam Stability of Sodium Bis(2-ethylhexyl)sulfosuccinate Aqueous Solutions

Interfacial rheology and aggregation behaviour of amphiphilic CBABC-type pentablock copolymers at the air–water interface: effects of block ratio and chain length

Contact Info

Product

Resources

About