Wettability of conducting polymers: From superhydrophilicity to superoleophobicity

Darmanin, Thierry

doi:10.1016/j.progpolymsci.2013.10.003

Cited by 228 publications

(149 citation statements)

References 193 publications

Supporting

Mentioning

142

Contrasting

Order By: Relevance

“…The change of the surface energy of the P3HT thin film is related to the charge and density of doped anions, which is similar to the case of many other conjugated polymers like polypyrrole and polyaniline reported before. [18,19,[21][22][23] positive voltage is applied, small polarons (holes) with positive charges are induced in the backbone of polymer chains due to the doping of anions from the PBS solution. Consequently, dipoles formed by holes and anions can increase the surface energy of the P3HT film, leading to the wettability switching from hydrophobicity to hydrophilicity.…”

Section: Conjugated Polymersmentioning

confidence: 99%

Conjugated Polymer for Voltage‐Controlled Release of Molecules

Liu

et al. 2017

Advanced Materials

View full text Add to dashboard Cite

Conjugated polymers are attractive in numerous biological applications because they are flexible, biocompatible, cost‐effective, solution‐processable, and electronic/ionic conductive. One interesting application is for controllable drug release, and this has been realized previously using organic electronic ion pumps. However, organic electronic ion pumps show high operating voltages and limited transportation efficiency. Here, the first report of low‐voltage‐controlled molecular release with a novel organic device based on a conjugated polymer poly(3‐hexylthiophene) is presented. The releasing rate of molecules can be accurately controlled by the duration of the voltage applied on the device. The use of a handy mobile phone to remotely control the releasing process and its application in delivering an anticancer drug to treat cancer cells are also successfully demonstrated. The working mechanism of the device is attributed to the unique switchable permeability of poly(3‐hexylthiophene) in aqueous solutions under a bias voltage that can tune the wettability of poly(3‐hexylthiophene) via oxidation or reduction processes. The organic devices are expected to find many promising applications for controllable drug delivery in biological systems.

show abstract

Section: Conjugated Polymersmentioning

confidence: 99%

Conjugated Polymer for Voltage‐Controlled Release of Molecules

Liu

et al. 2017

Advanced Materials

View full text Add to dashboard Cite

show abstract

“…The mechanisms of membrane separation are based on exact opposite wettabilities toward oil and water, including superhydrophobic/superoleophilic membranes 3,5-8 or superhydrophilic/superoleophobic membranes. [9][10][11][12][13][14][15] For example, superhydrophobic/oleophilic membranes have been prepared from various materials, including metals, polymers or even clothes and filter papers, that could intercept water and allow oil to pass through. [16][17][18][19][20] In addition, researchers have gained inspiration from oil-contaminantfree fish skin to fabricate oil-repellent hydrogel membranes that could separate oil from water.…”

Section: Introductionmentioning

confidence: 99%

Separation of organic liquid mixture by flexible nanofibrous membranes with precisely tunable wettability

Hou

Wang

et al. 2016

NPG Asia Mater

View full text Add to dashboard Cite

Separation of liquid mixtures, especially organic liquid mixtures, is widely used in industrial processes but still faces challenges with respect to separation in a high-efficiency, low-energy mode. In this work, we report a flexible wettability-tunable nanofibrous membrane composed of a high-performance fluoro-polymer as the matrix and fluorosilane as a surface energy regulator that can be successfully applied in immiscible organic liquid mixture separation. The separation is achieved by tuning the surface energy of a membrane to a value between the surface tensions of two organic liquids. Moreover, for use in different mixed liquid systems, we programmatically designed nanofibrous membranes with the proper surface energy that could intercept the relatively high surface tension liquid and allow the low surface tension liquid to pass through. These membranes are expected to become a competitive candidate for complex organic chemical product separation, resource recycling, and environmental protection. INTRODUCTIONLiquid mixtures of solvents or reactants are ubiquitously applied in processes in the petrochemical, textile printing, food and medical industries. These complex liquid mixtures often must be separated after reaction for the purpose of product purification, resource recycling or harmless discharge. 1 Traditional liquid separation methods such as distillation and separation have exposed many drawbacks, including high-energy consumption, low flux and low efficiency, that dramatically increase the separation time and cost. 2 Therefore, challenges remain for the development of separation processes of organic liquid mixtures that are efficient, allow high throughput and conserve energy. Among various separation approaches, the membrane separation technique has been extensively proven as a high throughput and energy-efficient choice. [3][4][5] Over the past decade, various membranes with special wettability properties have been successfully prepared and have exhibited excellent performance in oil/water separation. The mechanisms of membrane separation are based on exact opposite wettabilities toward oil and water, including superhydrophobic/superoleophilic membranes 3,5-8 or superhydrophilic/superoleophobic membranes. 9-15 For example, superhydrophobic/oleophilic membranes have been prepared from various materials, including metals, polymers or even clothes and filter papers, that could intercept water and allow oil to pass through. [16][17][18][19][20] In addition, researchers have gained inspiration from oil-contaminantfree fish skin to fabricate oil-repellent hydrogel membranes that could separate oil from water. 21,22 Although significant progress has been achieved for membrane-based oil/water separation in the last few years, development of separation membranes for organic liquids is still highly limited because organic liquids usually possess a relatively lower surface tension than water. The difficulty in separation of organic liquid mixtures has increased because it is more difficult to build a super...

show abstract

“…However, droplets on common substrates usually suffer from surface contamination and losses during manipulation, due to the contact angle hysteresis and contact line pinning. Various approaches have been proposed to avoid this problem over the past decades, including superhydrophobic surfaces (SH) [84][85][86], superlyophobic surfaces (SLS) [87,88], and slippery liquid-infused porous surfaces (SLIPs) [89]. Among all approaches, microstructured SLS is a promising and versatile platform for planar microfluidics, due to their excellent non-wetting characteristic and low flow resistance for almost any liquid.…”

Section: Soft Lithographymentioning

confidence: 99%

Chemical and Physical Pathways for Fabricating Flexible Superamphiphobic Surfaces with High Transparency

et al. 2018

View full text Add to dashboard Cite

Since the discovery of the self-cleaning properties of the lotus effect, the wetting of surfaces were intensively investigated due to their potential application in many industrial sectors. The transparency of flexible liquid repellent coatings are a major industrial problem and their economic consequences are widely known. Hence, a comprehensive understanding of the developments of flexible and transparent superamphiphobic surfaces is required in a number of technological and industrial situations. In this review, we aim to discuss the progress in the design, synthesis, fabrication techniques, and applications of flexible and transparent superamphiphobic surfaces. We start with an introduction, exploring the contact angles and wetting states for superhydrophilic, superhydrophobic, and superoleophobic surfaces, and continue with a review of the wetting transition of such surfaces. Then, we highlight the fabrication techniques involved for the preparation of flexible and transparent superamphiphobic surfaces. This review also discusses the key issues in the fabrication process and surfaces, and their features in improving durability characteristics and self-repellent performance. Then we suggest various recommendations for the improvement of mechanical durability along with potential future directions towards more systematic methods that will also be acceptable for industry. Finally, we conclude with some challenges and potential applications.

show abstract

Wettability of conducting polymers: From superhydrophilicity to superoleophobicity

Cited by 228 publications

References 193 publications

Conjugated Polymer for Voltage‐Controlled Release of Molecules

Conjugated Polymer for Voltage‐Controlled Release of Molecules

Separation of organic liquid mixture by flexible nanofibrous membranes with precisely tunable wettability

Chemical and Physical Pathways for Fabricating Flexible Superamphiphobic Surfaces with High Transparency

Contact Info

Product

Resources

About