Poly(ethylene oxide)s hydrophobically modified. Adsorption and spreading at the air–water interface

Leiva, Ángel; Urzúa, Marcela; Gargallo, Ligia; Radić, Deodato

doi:10.1016/j.jcis.2006.01.063

Cited by 9 publications

(7 citation statements)

References 28 publications

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“…The surface tension of CTAB measured at different temperatures exhibited a similar trend for all temperatures and the surface tension was decreased with the increase in temperature (Fig. 7) as observed for other systems 49, 50. With the increase in temperature the solvent–solute interactions changed and resulted a decrease in surface tension.…”

Section: Resultssupporting

confidence: 71%

“…It can be noted that in low concentration of polymer almost one surfactant molecules is adsorbed at every monomer of polymer. However, with the increases in polymer concentration inter‐ and intramolecular molecular interactions among polymer molecules set in, resulting a change in conformation of polymer and reduces available cites to surfactants and hence the amount of surfactant adsorbed at the polymer decreases 45–49. The CMC obtained from the dependence of surface tensions over surfactant concentration (Fig.…”

Section: Resultsmentioning

confidence: 99%

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Investigating the micellization behavior of cetyltrimethylammonium bromide: As affected by the contents of poly(ethylene oxide) and temperature of the system

Baloch

Ahmad

Durani

et al. 2010

J of Applied Polymer Sci

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The micellization behavior of cetyltrimethylammonium bromide (CTAB) is investigated in the absence and presence of poly(ethylene oxide) employing surface tension, light scattering, and viscosity and conductance measurement. It has been concluded that the critical micellization concentration (CMC) of CTAB in the presence of polymer increases with the increase in polymer concentration. The three ranges of interaction among the polymer and CTAB with respect to concentration of CTAB are identified at surface tension plot and noted to depend upon polymer concentration. The effect of temperature over these interactions and CMC of CTAB has been investigated. It is observed that the CMC, DH, and flow activation energy of the system increases with the increase in polymer concentration whereas CMC of CTAB decreases with the temperature. R H and R g /R H values determined by light scattering also indicate such type of behavior. The CMC values have also been obtained by viscosity and conductivity measurement. The results and conclusions drawn through all the techniques were consistent. New methodology has also been introduced to interpret the data obtained by surface tension, viscosity, and conductance measurement, and get information about the point of interaction and saturation of polymer with surfactant, which was noted to be very useful and informative.

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Section: Resultssupporting

confidence: 71%

Section: Resultsmentioning

confidence: 99%

Investigating the micellization behavior of cetyltrimethylammonium bromide: As affected by the contents of poly(ethylene oxide) and temperature of the system

Baloch

Ahmad

Durani

et al. 2010

J of Applied Polymer Sci

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show abstract

“…Langmuir-Blodgett (LB) films of HM-PiPrOx 7 K were obtained by deposition of Langmuir films onto a hydrophilic silicon wafer using various upstroke rates (10,30, and 50 mm min À1 ) (Fig. 10).…”

Section: Morphology Of Films Transferred On Solid Substratesmentioning

confidence: 99%

“…Most fundamental studies on telechelic HM-polymers focus on the ''bulk" properties of their aqueous solutions, rather than on their interfacial characteristics. A number of reports demonstrate that PEO chains modified with hydrophobic substituents, such as n-alkyl [10], perfluoro [11], polyhedral oligomeric silsesquioxanes [12], or double-chained lipids [13] are able adsorb at the A/W interface upon end-group modification. Endmodified HM-poly(N-isopropylacrylamide) (PNIPAM) derivatives [14] also form Langmuir films at the A/W interface.…”

Section: Introductionmentioning

confidence: 99%

Temperature-dependent interfacial properties of hydrophobically end-modified poly(2-isopropyl-2-oxazoline)s assemblies at the air/water interface and on solid substrates

Obeid

Park

Advincula

et al. 2009

Journal of Colloid and Interface Science

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“…The compression velocity was 10 cm 2 s -1 (16.7 mm 2 /seg). The monolayers were independent of the compression rate under this compression velocity, staying in equilibrium state [25,26].…”

Section: Monolayers and Surface Pressure-area Isothermsmentioning

confidence: 89%

Polymers containing phtalimidoalkyl groups in the side chains. effect of the alkyl groups in monolayers at the airwater interface

Gargallo¹,

Leiva

González³

et al. 2012

E-Polymers

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Surface activity of poly(methacrylate)s containing phthalimidoalkyl groups was studied. Surface pressure-area isotherms ( -A) at the air-water interface were determined. These polymers form stable and condensed monolayers. The monolayers are more condensed and the limiting surface area A 0 values decrease when the number of the methylene groups in the lateral chains increases. Surface pressure variation at the semidilute region of the monolayers was expressed in terms of the scaling laws as power function of the surface concentration. The static elasticity ε o and the exponent of the excluded volume υ were determined. The hydrophobicity degree of polymers was estimated from the determination of the total surface free energy values by wettability measurements. Molecular dynamic simulation (MDS) was performed in order to explain the experimental behavior of polymers at the air-water interface.

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Poly(ethylene oxide)s hydrophobically modified. Adsorption and spreading at the air–water interface

Cited by 9 publications

References 28 publications

Investigating the micellization behavior of cetyltrimethylammonium bromide: As affected by the contents of poly(ethylene oxide) and temperature of the system

Investigating the micellization behavior of cetyltrimethylammonium bromide: As affected by the contents of poly(ethylene oxide) and temperature of the system

Temperature-dependent interfacial properties of hydrophobically end-modified poly(2-isopropyl-2-oxazoline)s assemblies at the air/water interface and on solid substrates

Polymers containing phtalimidoalkyl groups in the side chains. effect of the alkyl groups in monolayers at the airwater interface

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