Spontaneous free-standing nanostructured film growth in polyelectrolyte-surfactant systems

Edler, Karen J.; Goldar, Arach; Brennan, Tim; Roser, Stephen J.

doi:10.1039/b304202b

Cited by 44 publications

(65 citation statements)

References 17 publications

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“…It also implicitly assumes that heat conduction is sufficiently rapid to supply the energy of vaporization for the water. If not, then there 55 will be a localized dip in the temperature in the interfacial region. 13 We further assume that the bulk solution is large enough so that even though there is some water evaporation, the bulk concentration can be assumed constant over the time frame considered.…”

Section: Three Components General Considerationsmentioning

confidence: 99%

“…In laboratory studies of lipid systems, one also needs to be aware of the possibility of non-equilibrium effects. In a typical Langmuir trough laboratory setup there is not full control of the 55 thermodynamic conditions of the gas phase. It is the rule rather than the exception that the relative humidity (RH) of the gas phase does not match the chemical potential of the water (µ(H 2 O)) in the liquid phase.…”

Section: Introductionmentioning

confidence: 99%

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Lipid phase behaviour under steady state conditions

2013

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12177), we here analyse the phenomenon for threecomponent systems. The relevant transport equations are derived, and explicit results are given for some limiting cases. Then the formalism is applied conceptually to four different aqueous lipid systems, which in addition to water and a phospholipid contain i) octyl glucoside, ii) urea, iii) heavy water, iv) sodium cholate as the third component. These four cases are chosen to illustrate i) a method to use a micelle 15 former to transport lipid to the interface where a multi-lamellar structure can form; ii) to use a co-solvent to inhibit the formation of a gel phase at the interface; iii) a method to form pure phospholipid multilamellar structures at the interface; iv) a method to form a sequence of phases in the interfacial region. These four cases all have the character of theoretically based conjectures and it remains to investigate experimentally whether or not the conditions can be realized in practice.

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Section: Three Components General Considerationsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Lipid phase behaviour under steady state conditions

2013

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“…Film induction period is therefore the amount of time it takes growing silica 13 'polymers' to reach the critical molecular weight accredited to charge neutrality. [24] As concentration of 14 TEOS increases the amount of time for this to happen is reduced. Beyond the point of charge neutrality, 15 silica polymers completely coat surfactant micelles and so silica-surfactant complexes effectively repel one 16…”

Section: ] 28mentioning

confidence: 99%

“…The main findings can be summarised as followed [24,25,61,62,63] : where ordering may be lost, however this is only the case at high polymer concentrations). 2 4.…”

Section: ] 28mentioning

confidence: 99%

“…Recent work has shown that under certain conditions it is 37 possible to form free-standing (macroscopic) polymer-surfactant films with highly ordered mesostructures, 38 spontaneously at the air-liquid interface. [24,25] If a silica precursor is added to the polymer-surfactantmixture then a film again forms at the air-liquid interface, removal of the surfactant template framework 1 leaves a micron-thick mesoporous polymer silica membrane. [26] Not only is the mesostructures retained 2 (something seldom reported in silica films) this membrane is also thicker and more robust than typically 3 brittle inorganic films.…”

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Solid mesostructured polymer–surfactant films at the air–liquid interface

Pegg

Eastoe

2015

Advances in Colloid and Interface Science

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General rightsThis document is made available in accordance with publisher policies. Please cite only the published version using the reference above. Full terms of use are available: http://www.bristol.ac.uk/pure/about/ebr-terms Solid, Mesostructured Polymer-Surfactant Films Formed at the Air-Liquid Interface self-supporting films comprising surfactant micelles encased with a polymer hydrogel-surfactant-polymer 6 films, that can be grown spontaneously at the air-liquid interface. These films can be prepared with defined 7 and controllable mesostructures. Addition of a siliconalkoxide to polymer-surfactant mixtures allowed for 8 the growth of mesostructured hybrid polymer-surfactant silica films that retained film geometry after 9 calcination and exhibit superior mechanical properties to typically brittle inorganic films. Growing films at 10 the air-liquid interface provides the most rapid and simple means to prepare ordered solid inorganic films 11 and to date the only method to form mesostructure films thick enough (up to several hundred microns) to be 12 removed from the interface. Applications of these films could range from catalysis to encapsulation of 13 hydrophobic species and drug delivery. Film properties and mesostructure are sensitive to surfactant 14 structure, polymer properties and polymer-surfactant phase behaviour: herein it will be shown in particular 15 how the film mesostructure can be tailored by directing these parameters and some interesting analogies will 16 be drawn with more familiar mesostructure silica materials.

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Mesoporous Silicates

Edler¹

2010

Porous Materials

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Spontaneous free-standing nanostructured film growth in polyelectrolyte-surfactant systems

Cited by 44 publications

References 17 publications

Lipid phase behaviour under steady state conditions

Lipid phase behaviour under steady state conditions

Solid mesostructured polymer–surfactant films at the air–liquid interface

Mesoporous Silicates

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