pH‐ and Voltage‐Switchable Superhydrophobic Surfaces by Electro‐Copolymerization of EDOT Derivatives Containing Carboxylic Acids and Long Alkyl Chains

Darmanin, Thierry

doi:10.1002/cphc.201300283

Cited by 33 publications

(14 citation statements)

References 49 publications

(40 reference statements)

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“…The hydrophobic behavior of solid surfaces has a wide diversity of applications such as self-cleaning surfaces, high adhesive sur-faces, antifogging coatings, and antireflection coatings [1]. Different preparation strategies have been developed to fabricate hydropho-bic surfaces [2,3], which include nanoparticles doping [4][5][6], the introduction of fluoric or silicic or long alkyl chain chemistry [7][8][9][10], and plasma treatment [11,12]. He et al [13,14] used CF4 plasma modification for the conversion of a hydrophilic membrane into a hydrophobic membrane but a simple, universal and efficient chemical method for the direct hydrophobic modification of a wide range of polymers would be highly desirable.…”

Section: Introductionmentioning

confidence: 99%

Surface hydrophobic modification of polymers with fluorodiazomethanes

et al. 2018

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Two fluorinated diazomethanes were synthesized, and used for the modification of polystyrene XAD4, polyacrylate MAC-3, filter paper, and Hybond TM membrane. The structure of modified polymers was con-firmed by XPS and solid-state NMR spectra, with a surface loading of 8.28 10 12 -1.68 10 13 molecules per cm 2 . Water contact angle values, which increased from 0L to 128.51L (for filter paper) and 120.02L (for Hybond TM membrane), demonstrated hydrophobicity.

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Section: Introductionmentioning

confidence: 99%

Surface hydrophobic modification of polymers with fluorodiazomethanes

et al. 2018

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“…Conducting polymers (CPs) are a class of functional polymers with electroactivity derived from unique molecular structures6 and a promising material for use in biomedical fields due to its excellent tissue compatibility 7. CPs have been revealed to be reversibly switchable (known as an intelligent property) in wettability in response to external stimuli (electrical potential, specific chemical and pH) 8. They thus may potentially be used in industrial applications such as self‐cleaning surfaces and microfluidics 9.…”

mentioning

confidence: 99%

“…[7] CPs have been revealed to be reversibly switchable (known as an intelligent property) in wettability in response to external stimuli (electrical potential, specific chemical and pH). [8] They thus may potentially be used in industrial applications such as self-cleaning surfaces and microfluidics. [9] Yan [9a, b] and Jiang [10] described that CP films underwent a reversible change in wettability from superhydrophobic to superhydrophilic, both resulting from perfluorinated dopant flux.…”

mentioning

confidence: 99%

Nanostructured Conducting Polymers as Intelligent Implant Surface: Fabricated on Biomedical Titanium with a Potential‐Induced Reversible Switch in Wettability

Liao¹,

Ning²,

Yin³

et al. 2013

ChemPhysChem

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“…and fluorinated chains [100]. The authors studied the influence of the percentage of each monomer, the doping state and also the pH on both the surface hydrophobicity (Figure 18).…”

Section: Dual Sensitivitymentioning

confidence: 99%

Switchable and Reversible Superhydrophobic Surfaces: Part Two

Taleb¹,

Darmanin²,

Guittard³

2018

Interdisciplinary Expansions in Engineering and Design With the Power of Biomimicry

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In this book chapter, most of the methods used in the literature to prepare switchable and reversible superhydrophobic surfaces are described. Inspired by Nature, it is possible to induce the Cassie-Baxter-Wenzel transition using different external stimuli such as light, temperature, pH, ion exchange, voltage, magnetic field, mechanic stress, plasma, ultrasonication, solvent, gas or guest. Such properties are extremely important for various applications but especially for controllable oil/water separation membranes, oil-absorbing materials, and water harvesting systems.Keywords: superhydrophobic, reversible, switchable, bioinspiration, biomimetism Reversible superhydrophobic surfaces: Part twoThis section provides continuation of the description of the stimuli used in the literature to induce reversible changes in surface wettability. Ion exchangeSince 2004, the researchers have shown that the presence of charged species such as quaternary ammonium groups are sensitive to ion exchange and lead to different surface wettabilities. In 2004, Choi et al. prepared self-assembled monolayers (SAM) with imidazolium groups on smooth Au and Si/SiO 2 substrates [1][2][3]. They studied the effect of a series of anions as shown in Figure 1 and In order to elaborate reversible superhydrophobic properties by ion exchange, gold micro and nanostructured substrates were performed by electroless etching process by immersing silicon substrates in aqueous solution of HAuCl 4 and HF (Figure 2). The surface was then modified by SAM using a thiol terminated by a quaternary ammonium. Then, the surface wettability could be reversely changed from superhydrophilic to superhydrophobic after [20]. Here, the presence of TSPM (sol-gel precursor) was used not only to form a polymer network via intramolecular interactions but also to anchor substrates (Figure 3). The membranes could reversely change from superhydrophobic/highly oleophobic to superhydrophilic/superoleophobic after exchanging Cl − ions by heptadecafluorooctanesulfonic acid (C 8 F 17 SO 3 − or HPS − ) ions. Moreover, the membranes were also highly efficient filter medium for removing multiple contaminants such as SO 2 form waster gas streams. A nother strategy was to deposit polyelectrolyte multilayers poly(diallyldimethylammonium chloride (PDDA) and poly(sodium 4-styrenesulfonate) (PSS) on gold micro and nanostructured substrates [21]. The authors studied the influence of the exchanged ions and the highest properties were obtained by exchanging Cl − (θ w < 5°) ions by PFO − (θ w = 164°). The authors also deposited polyelectrolyte multilayers on micro and nanostructured aluminum substrates obtained by etching in HCl and immersion in boiling water [22,23]. Using PFO − ions, the substrates were superhydrophobic and superoleophobic. When the substrates were immersed in seawater, the PFO − ions were exchanged by hydrophilic Cl − or SO 4 2− making the substrates underwater superoleophobic. Magnetic fieldEnvironment protection against oil leakage during oil tankers sinking is ...

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pH‐ and Voltage‐Switchable Superhydrophobic Surfaces by Electro‐Copolymerization of EDOT Derivatives Containing Carboxylic Acids and Long Alkyl Chains

Cited by 33 publications

References 49 publications

Surface hydrophobic modification of polymers with fluorodiazomethanes

Surface hydrophobic modification of polymers with fluorodiazomethanes

Nanostructured Conducting Polymers as Intelligent Implant Surface: Fabricated on Biomedical Titanium with a Potential‐Induced Reversible Switch in Wettability

Switchable and Reversible Superhydrophobic Surfaces: Part Two

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