Influence of assembly pH on compression and Ag nanoparticle synthesis of polyelectrolyte multilayers

Gong, Xiao; Han, Lulu; Yue, Yanan; Gao, Jianrong; Gao, Changyou

doi:10.1016/j.jcis.2010.12.054

Cited by 21 publications

(10 citation statements)

References 23 publications

(40 reference statements)

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“…As mentioned before, without addition of salt the tendency of the assembly was similar to that found by other authors. 55 The charge density and the structural conformation of PDADMAC remain the same regardless of the pH. On the other hand, the higher the pH the more dissociated the carboxylic acid groups of PSS-MA and the higher the repulsive forces among the charges, causing a more extended conformation of the polymer chains.…”

Section: Resultsmentioning

confidence: 96%

pH-responsive ion transport in polyelectrolyte multilayers of poly(diallyldimethylammonium chloride) (PDADMAC) and poly(4-styrenesulfonic acid-co-maleic acid) (PSS-MA) bearing strong- and weak anionic groups

Maza

Tuninetti

Politakos

et al. 2015

Phys. Chem. Chem. Phys.

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The layer-by-layer construction of interfacial architectures displaying stimuli-responsive control of mass transport is attracting increasing interest in materials science. In this work, we describe the creation of interfacial architectures displaying pH-dependent ionic transport properties which until now have not been observed in polyelectrolyte multilayers. We describe a novel approach to create pH-controlled ion-rectifying systems employing polyelectrolyte multilayers assembled from a copolymer containing both weakly and strongly charged pendant groups, poly(4-styrenesulfonic acid-co-maleic acid) (PSS-MA), alternately deposited with poly(diallyldimethylammonium chloride) (PDADMAC). The conceptual framework is based on the very contrasting and differential interactions of PSS and MA units with PDADMAC. In our setting, sulfonate groups play a structural role by conferring stability to the multilayer due to the strong electrostatic interactions with the polycations, while the weakly interacting MA groups remain "silent" within the film and then act as on-demand pH-responsive units. When these multilayers are combined with a strong cationic capping layer that repels the passage of cationic probes, a pH-gateable rectified transport of anions is observed. Concomitantly, we also observed that these functional properties are significantly affected when multilayers are subjected to extensive pH cycling as a consequence of irreversible morphological changes taking place in the film. We envision that the synergy derived from combining weak and strong interactions within the same multilayer will play a key role in the construction of new interfacial architectures displaying tailorable ion transport properties.

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Section: Resultsmentioning

confidence: 96%

pH-responsive ion transport in polyelectrolyte multilayers of poly(diallyldimethylammonium chloride) (PDADMAC) and poly(4-styrenesulfonic acid-co-maleic acid) (PSS-MA) bearing strong- and weak anionic groups

Maza

Tuninetti

Politakos

et al. 2015

Phys. Chem. Chem. Phys.

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show abstract

“…), which can be used in the deposition process . Also, the properties of multilayer films are influenced by the assembly conditions, such as the concentration, pH, ionic strength and temperature of deposition solutions . All these parameters allowed the design of a large variety of multilayer films, which have found applications as separation membranes, anticorrosion, and flame‐retardant coatings, antimicrobial membranes, drug delivery systems, etc.…”

Section: Introductionmentioning

confidence: 99%

Sorption/release of diclofenac sodium in/from free‐standing poly(acrylic acid)/poly(ethyleneimine) multilayer films

Ghiorghiță¹,

Bucătariu²,

Drăgan³

2016

J of Applied Polymer Sci

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Polyelectrolyte multilayer films deposited onto various substrates have been used extensively as drug delivery systems. However, little attention has been paid to the release of drugs from free‐standing polymeric films. Herein, we report the construction of thermal crosslinked free‐standing poly(acrylic acid) (PAA)/branched poly(ethyleneimine) (PEI) multilayer films composed of 25 double layers [(PAA/PEI)25] and their use in sorption/release of diclofenac sodium (DS). The (PAA/PEI)25 multilayer films were characterized by scanning electron microscopy, potentiometric titrations and Fourier transform infrared spectroscopy, while the sorption/release of DS was monitored by UV–Vis spectroscopy. The DS sorption equilibrium data were fitted with five isotherm models (Langmuir, Freundlich, Sips, Dubinin–Radushkevich, and Temkin). The maximum equilibrium sorption capacity, qm, given by the Langmuir model was 32.42 mg DS/g. The Korsmeyer–Peppas semiempirical equation showed that the release of DS from the free‐standing (PAA/PEI)25 films proceeded by pseudo‐Fickian diffusion, irrespective of the releasing media. © 2016 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2016, 133, 43752.

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“…The TEM image (Fig. 3C) The absorption intensity in the whole visible light significantly enhanced with increasing SILAR cycles of PbS QDs, due to the growth of the PbS QDs [38]. The enhanced ability to absorb visible light makes this type of QDs/TiO 2 NSs a promising application in photovoltaic devices.…”

Section: Resultsmentioning

confidence: 99%

Photoelectrolchemical performance of PbS/CdS quantum dots co-sensitized TiO2 nanosheets array film photoelectrodes

Yao

Liu

et al. 2015

Journal of Alloys and Compounds

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Influence of assembly pH on compression and Ag nanoparticle synthesis of polyelectrolyte multilayers

Cited by 21 publications

References 23 publications

pH-responsive ion transport in polyelectrolyte multilayers of poly(diallyldimethylammonium chloride) (PDADMAC) and poly(4-styrenesulfonic acid-co-maleic acid) (PSS-MA) bearing strong- and weak anionic groups

pH-responsive ion transport in polyelectrolyte multilayers of poly(diallyldimethylammonium chloride) (PDADMAC) and poly(4-styrenesulfonic acid-co-maleic acid) (PSS-MA) bearing strong- and weak anionic groups

Sorption/release of diclofenac sodium in/from free‐standing poly(acrylic acid)/poly(ethyleneimine) multilayer films

Photoelectrolchemical performance of PbS/CdS quantum dots co-sensitized TiO2 nanosheets array film photoelectrodes

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