Dewetting Process of Polyelectrolyte Multilayer Films in Hot Water

Qin, Sheng; Wei, Dongshan; Liao, Qi; Jin, Xin

doi:10.1002/marc.200500620

Cited by 20 publications

(30 citation statements)

References 20 publications

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“…Actually, this could be comparable to the Vicat deflection measurement. When the PSS/PDADMAC multilayers were treated in water with an extremely high temperature, i.e., 90 8C, they were damaged and detached from the substrates as also previously observed by Qin et al [60] Nevertheless, an appropriate molding temperature can facilitate the fluidity of the multilayers and thereby is favor of formation of high patterns.…”

Section: Influence Of Molding Temperaturementioning

confidence: 80%

Force‐Free Patterning of Polyelectrolyte Multilayers under Solvent Assistance

Han

Zhou

Gong

et al. 2010

Macro Materials & Eng

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Physical patterns were created on hydrated PSS/PDADMAC multilayers without using external force. A typical process was to put a PDMS stamp onto the wet and swollen multilayers, which were then put into an oven and maintained for a period of time to micromold the multilayers. The influence of molding temperature and time, multilayer thickness, solvent quality, and multilayer compositions on pattern formation were elucidated. Evolution of the patterns from double lines, double strips, and meniscus‐shaped ridges to high ridges was observed under all conditions, revealing that this is a universal principle for this process. Finally, patterns on PAA/PAH and PSS/PAH multilayers were also prepared at the optimal conditions, highlighting its wide generality on the multilayer patterning.

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Section: Influence Of Molding Temperaturementioning

confidence: 80%

Force‐Free Patterning of Polyelectrolyte Multilayers under Solvent Assistance

Han

Zhou

Gong

et al. 2010

Macro Materials & Eng

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“…Porous LbL thin films have been also obtained through the process of partial dewetting. For example, pores in multilayers were induced by the annealing of as‐assembled LbL films in hot water 28. This method, however, gave rise to polydisperse macroscopic pores.…”

Section: Porous Hydrogel Films and Membranesmentioning

confidence: 99%

Stimuli‐Responsive Porous Hydrogels at Interfaces for Molecular Filtration, Separation, Controlled Release, and Gating in Capsules and Membranes

2010

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A continuously growing area of controlled and tunable transport and separation of biomolecules and drugs has recently attracted attention to the structures which can be referred to as stimuli-responsive porous hydrogel thin films. Because of spatial constraints, swelling/shrinking of the hydrogel films results in closing/opening (or vice versa) of the film's pores. Such responsive systems can be used in the configuration of plane films or capsules. The combination of a low thickness (translating into a low hydrodynamic flow resistance and rapid response) with well-defined size and shape of pores (translating into better control of transport and separation), which can be closed, opened, or tuned by an external signal (allowing a large amplitude of changes in diffusivity of solutes in the thin film and a precise control of the pore size), makes these materials very attractive for a range of applications, such as molecular filtration, separation, drug delivery, sensors, and actuators.

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“…Besides ionic strength, chain mobility in electrostatic LBL films may also be affected by solution pH, type of salt, temperature, charge density, and molecular weight of the polyelectrolytes . Rubner et al found a brief immersion of PAA/poly(allylamine) (PAH) films in acidic solution results in a substantial and irreversible transformation of the film morphology. The resulting porous films can be used as antireflection coatings and many other applications .…”

Section: Dynamic Properties Of Dynamic Lbl Filmsmentioning

confidence: 99%

“…The dynamic nature of the dynamic LBL films allows for the polymer chains to diffuse within the film, which is a prerequisite for dewetting to occur . Qin et al obtained a porous poly(sodium 4‐styrenesulfonate) (PSS)/ poly(diallyldimethylammonium chloride) (PDDA) film by immersing the films in hot water to allow it to dewet. Other electrostatic LBL films were found to dewet and produce porous films too .…”

Section: Applications Based On Dynamic Propertiesmentioning

confidence: 99%

Dynamically bonded layer‐by‐layer films: Dynamic properties and applications

Guan

Zhang

2014

J of Applied Polymer Sci

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Layer-by-layer (LBL) assembly, a simple but versatile method for thin film fabrication, has been widely employed to fabricate nanoengineered films with controlled composition and thickness. Dynamically bonded LBL films are films fabricated using dynamic bonds, that is, chemical bonds which can undergo reversible breaking and reformation usually under equilibrium conditions, as driving forces. Because of the reversible, dynamic nature of the dynamic bonds, these films exhibit various dynamic properties, ranging from a small scale movement of the polymer chains within the films (chain rearrangement), to a large scale movement of the chains, which results in film disintegration. Usually an external stimulus is used to trigger the response of a dynamic film. Novel applications have been proposed by exploiting the dynamic properties of these films. V C 2014 Wiley Periodicals, Inc. J. Appl. Polym. Sci.2014, 131, 40918.

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Dewetting Process of Polyelectrolyte Multilayer Films in Hot Water

Cited by 20 publications

References 20 publications

Force‐Free Patterning of Polyelectrolyte Multilayers under Solvent Assistance

Force‐Free Patterning of Polyelectrolyte Multilayers under Solvent Assistance

Stimuli‐Responsive Porous Hydrogels at Interfaces for Molecular Filtration, Separation, Controlled Release, and Gating in Capsules and Membranes

Dynamically bonded layer‐by‐layer films: Dynamic properties and applications

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