Hydration and Structural Properties of a Homologous Series of Nonionic Alkyl Oligo(ethylene oxide) Surfactants

Klose, G.; Eisenblaetter, S.; Galle, Joerg; Исламов, А. Х.; Dietrich, U.

doi:10.1021/la00008a008

Cited by 41 publications

(60 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…2. The horizontal axes indicate the molar fraction of C 12 EO 8 , X C 12 EO 8 , in the mixture of C 12 EO 8 /C 12 EO 0 , and the number of EO units n. In the pure system, d increases with n. Similar results were reported by Kunieda et al [29] and Klose et al [33]. However, in Fig.…”

Section: Molecular Packing In Lamellar Liquid Crystalssupporting

confidence: 83%

Head group effects on molecular packing in lamellar liquid crystals

Ishizuka

Arima

Aramaki

2011

Journal of Colloid and Interface Science

View full text Add to dashboard Cite

Section: Molecular Packing In Lamellar Liquid Crystalssupporting

confidence: 83%

Head group effects on molecular packing in lamellar liquid crystals

Ishizuka

Arima

Aramaki

2011

Journal of Colloid and Interface Science

View full text Add to dashboard Cite

“…According to the packing parameter theory, a single-tailed surfactant tends to form spherical micelles, while a double-tailed surfactant leads to a bilayer structure in aqueous solution. Generally, a systematical examination of the effect of the surfactant head group on the molecular aggregates has some difficulties compared with that of the hydrophobic tail group, except for some nonionic surfactants with polyethylene or polysaccharide units [3][4][5][6][7][8][9][10][11][12][13][14]. Another exception is the amino acid-type surfactant system [15][16][17][18][19].…”

Section: Introductionmentioning

confidence: 99%

Effect of the side chain of N-acyl amino acid surfactants on micelle formation: An isothermal titration calorimetry study

Ohta

Toda

Morimoto

et al. 2008

Colloids and Surfaces A: Physicochemical and Engineering Aspect

View full text Add to dashboard Cite

The enthalpy of micelle formation, critical micelle concentration (CMC), and aggregation number of micelles for seven amino acid type surfactants, sodium-L-glutaminate (C12Gln), and -L-threoninate (C12Thr), were obtained at three temperatures ranging from 288.15 to 308.15 K by isothermal titration calorimetry. The enthalpies of micelle formation for these surfactants were positive at 288.15 K and decreased with increasing temperature to ultimately become negative above 308.15 K. The CMC of the amino acid surfactants decreased monotonously with increasing hydrophobicity of the amino acid residue without exception, while with the exception of the C12Phe system, the enthalpy of micelle formation increased. The micellization behavior of C12Phe also deviated from that of other amino acid systems in terms of the heat capacity and the aggregation number. These results suggest the presence of a strong intra-micelle interaction between the side chains of phenylalanine.

show abstract

“…The approach established in Eq. 4.32 was in this way applied as a tool for the determination of the binding energy of water in phospholipids and non-ionic surfactants (Eisenblätter et al 1994;Klose et al 1995b). The value for POPC and C 12 E 4 have been given as E S D 28˙4 kJ/mol and E S D 24˙6 kJ/mol.…”

Section: Nuclear Magnetic Resonance (Nmr): Quadrupolar Splitting and mentioning

confidence: 99%

Hydration Forces Between Lipid Bilayers: A Theoretical Overview and a Look on Methods Exploring Dehydration

Pfeiffer

2015

Subcellular Biochemistry

View full text Add to dashboard Cite

Although, many biological systems fulfil their functions under the condition of excess hydration, the behaviour of bound water as well as the processes accompanying dehydration are nevertheless important to investigate. Dehydration can be a result of applied mechanical pressure, lowered humidity or cryogenic conditions. The effort required to dehydrate a lipid membrane at relatively low degree of hydration can be described by a disjoining pressure which is called hydration pressure or hydration force. This force is short-ranging (a few nm) and is usually considered to be independent of other surface forces, such as ionic or undulation forces. Different theories were developed to explain hydration forces that are usually not consistent with each other and which are also partially in conflict with experimental or numerical data.Over the last decades it has been more and more realised that one experimental method alone is not capable of providing much new insight into the world of such hydration forces. Therefore, research requires the comparison of results obtained from the different methods. This chapter thus deals with an overview on the theory of hydration forces, ranging from polarisation theory to protrusion forces, and presents a selection of experimental techniques appropriate for their characterisation, such as X-ray diffraction, atomic force microscopy and even calorimetry.

show abstract

Hydration and Structural Properties of a Homologous Series of Nonionic Alkyl Oligo(ethylene oxide) Surfactants

Cited by 41 publications

References 0 publications

Head group effects on molecular packing in lamellar liquid crystals

Head group effects on molecular packing in lamellar liquid crystals

Effect of the side chain of N-acyl amino acid surfactants on micelle formation: An isothermal titration calorimetry study

Hydration Forces Between Lipid Bilayers: A Theoretical Overview and a Look on Methods Exploring Dehydration

Contact Info

Product

Resources

About