Templateless electrodeposition of conducting polymer nanotubes on mesh substrates for high water adhesion

Darmanin, Thierry; Guittard, Frédéric

doi:10.1016/j.nanoso.2016.05.005

Cited by 10 publications

(7 citation statements)

References 55 publications

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“…Very recently, we demonstrated the possibility to prepare arrays of vertically aligned nanotubes in organic solvent (dichloromethane, for example) and without any surfactant . Here, trace water present naturally in organic solvent is sufficient to produce gas bubbles .…”

Section: Introductionmentioning

confidence: 99%

A Templateless Electropolymerization Approach to Nanorings Using Substituted 3,4‐Naphthalenedioxythiophene (NaPhDOT) Monomers

et al. 2017

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The formation of highly ordered surface structures is fundamental for various applications. Due to their rapidity of implementation and their cost, templateless processes are extremely interesting alternatives to the use of templates or lithographic processes. With the aim to prepare porous structures such as nanotubes, templateless electropolymerization was found to be a unique process. Based on previous works, we have synthesized 3,4-naphthalenedioxythiophene (NaPhDOT) monomers substituted with alkyl chains (n = 2 to 10), phenyl and naphthalene substituents. In particular, NaphDOT substituted with naphthalene (NaphDOTÀNa) leads for the first time to relatively densely packed nanorings while their internal diameter is controllable with the number of deposition scans. Compared to previous works, which lead to nanotubes from non-substituted NaphDOT and 3,4-phenylenedioxythiophene substituted with naphthalene (PheDOTÀNa), with NaphDOTÀNa we observe a very important decrease in the polymer growth. As a consequence, only the initial peripherical nucleation around the gas bubbles is possible, leading to nanorings, because their growth into nanotubes is impeded by their low conductivity.

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Section: Introductionmentioning

confidence: 99%

A Templateless Electropolymerization Approach to Nanorings Using Substituted 3,4‐Naphthalenedioxythiophene (NaPhDOT) Monomers

et al. 2017

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“…On the other hand, there have been a lot of studies on different types of coatings for spacers to enhance their surface properties. Some examples of such studies are a nanosilver surface modification to a reverse osmosis (RO) membrane and a spacer for mitigating biofouling, an antibacterial spacer obtained by the sonochemical deposition of ZnO nanoparticles, nanosilver-modified feed spacers for antibiofouling of ultrafiltration (UF) membranes, a polyaniline and polypyrrole (PPy) coating onto a stainless steel grid for high selectivity oil–water separation, graphene coating on a steel mesh for oil/organic-water separation, and the formation of nanotubes on stainless steel meshes by electropolymerization . Nevertheless, surface coating has not always been successful at enhancing the spacer performance.…”

Section: Introductionmentioning

confidence: 99%

Efficacy of Electrically-Polarized 3D Printed Graphene-blended Spacers on the Flux Enhancement and Scaling Resistance of Water Filtration Membranes

Yanar

Yang

Park

et al. 2021

ACS Sustainable Chem. Eng.

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In this research, an electrically-polarized graphene-polylactic acid (E-GRP) spacer is introduced for the first time by a novel fabrication method, which consists of 3D printing followed by electrical polarization under a high voltage electric field (1.5 kV/cm). The fabricated E-GRP was tested in an osmotic-driven process (forward osmosis system) to evaluate its performance in terms of water flux, reverse solute flux, and ion attraction compared to a 3D printed non-polarized graphene-polylactic acid (GRP) spacer and a polylactic acid (PLA) spacer. The use of the developed E-GRP spacer showed > 50% water flux enhancement (32.4 ± 2 LMH) compared to the system employing the GRP (20.5 ± 2.3 LMH) or PLA (20.8 ± 2.1 LMH) spacer. This increased water flux was attributed to the increased osmotic pressure across the membrane due to the ions adsorbed on the polarized (E-GRP) spacer. The E-GRP spacer also retarded the gypsum scaling on the membrane compared to the GRP spacer due to the dispersion effect of electrostatic forces between the gypsum aggregation and negatively charged surfaces. The electric polarization of the E-GRP spacer was shown to be maintained for > 100 h by observing its salt adsorption properties (in a 3 M NaCl solution).

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“…They stated that their approach may considerably enhance traditional separation system performance and improve removal of organic compounds and oil from water. Darmanin T. and Guittard F. [13] investigated computationally the performance of electrodeposition of nano-materials on metal mesh substrates and their impact on the surface hydrophilicity, which can employed in applications of water transportation and bio-sensing systems. A summary of modified coating spacers with materials shown in the literature is presented in Table 1.…”

Section: Introductionmentioning

confidence: 99%

“…Employing electropolymerization method on stainless steel mesh substrates to induce the nanotubes This mechanism can be benefit in oil/water separation membranes [13] Among methods to enhance membrane de-fouling performance, much focus has been shifted towards a combined electrochemical system with membrane water treatment processes. An alternative non-destructive, affordable and energy efficient membrane fouling mitigation techniques are required to adopted.…”

Section: Introductionmentioning

confidence: 99%

Electrically conductive spacers for self-cleaning membrane surfaces via periodic electrolysis

et al. 2017

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The use of an electrically conductive membrane has attracted significant interest in water treatment technology due to remarkable performance in fouling mitigation domain. In electrochemical systems, when external potential is applied, water electrolysis occurs and the generated gases efficiently clean the membrane surface. However, fabricating and integrating conductive membranes in current water treatment modules is challenging. The present work applies, for the first time, the electrolysis concept at the spacer component of the module rather than the membrane. Two types of materials were tested, a titanium metal spacer and a polymeric spacer. The polymeric spacer was made conductive via coating with a carbon-based ink comprised of graphene nanoplates (GNPs). A membrane system composed of the carbon coated/titanium metal spacer attached to the surface of a polyvinylidene fluoride (PVDF) microfiltration membrane and was assembled to the case of membrane module. The conductive spacers worked as an electrode (cathode) in electrochemical set-up. The membrane system was subjected to fouling and then exposed to periodic electrolysis, wherein in-situ cleaning of membrane surface by hydrogen bubbles generation at the spacer is applied.

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Templateless electrodeposition of conducting polymer nanotubes on mesh substrates for high water adhesion

Cited by 10 publications

References 55 publications

A Templateless Electropolymerization Approach to Nanorings Using Substituted 3,4‐Naphthalenedioxythiophene (NaPhDOT) Monomers

A Templateless Electropolymerization Approach to Nanorings Using Substituted 3,4‐Naphthalenedioxythiophene (NaPhDOT) Monomers

Efficacy of Electrically-Polarized 3D Printed Graphene-blended Spacers on the Flux Enhancement and Scaling Resistance of Water Filtration Membranes

Electrically conductive spacers for self-cleaning membrane surfaces via periodic electrolysis

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