Self‐Cleaning and Anti‐Fog Surfaces via Stimuli‐Responsive Polymer Brushes

Howarter, John A.; Youngblood, Jeffrey P.

doi:10.1002/adma.200700156

Cited by 260 publications

(229 citation statements)

References 51 publications

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“…For high grafting densities, the local viscosity of the brush can be very high and will likely result in a slow response. A good example of this effect was recently reported by Horwarter and Youngblood 58 where the stimuli-responsive nature of perfluorinated end-capped poly(ethylene glycol) layers was studied. Chain conformation was qualitatively assessed by comparing experimental film thicknesses to the calculated thickness for a fully extended chain.…”

Section: Are Extended Polymer Chains Required For Useful Applications?mentioning

confidence: 82%

A structural definition of polymer brushes

Brittain

Minko

2007

J. Polym. Sci. A Polym. Chem.

565

652

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ABSTRACT:In this article, we consolidate several literature reports in an attempt to provide a structural definition of a polymer brush as a tethered polymer layer with a high grafting density of polymer chains. We will try to distinguish a brush from grafted polymer layers and coated layers and provide a reasonable approach to the description of the brush regime with a single parameter S-reduced grafting density. Furthermore, we will attempt to describe the relevance of this description to applications. This article is timely given the continuing interest relating to brushes on flat substrates, nanoparticles, and the walls of micro-channels.

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Section: Are Extended Polymer Chains Required For Useful Applications?mentioning

confidence: 82%

A structural definition of polymer brushes

Brittain

Minko

2007

J. Polym. Sci. A Polym. Chem.

565

652

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“…22,23 The most attractive approach to date appears to be the utilisation of oleophobic-hydrophilic surfaces where the oil and oil-based contaminants are repelled and water passes through. 24 Such surfaces are also of interested for self-cleaning, 25,26,27 anti-fog, 25,28,29 and anti-fouling 30,31 applications.…”

Section: Introductionmentioning

confidence: 99%

Ultrafast Oleophobic–Hydrophilic Switching Surfaces for Antifogging, Self-Cleaning, and Oil–Water Separation

Brown

Atkinson

Badyal

2014

ACS Appl. Mater. Interfaces

148

123

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. (2014) 'Ultra-fast oleophobic-hydrophilic switching surfaces for anti-fogging, self-cleaning, and oil-water separation.', ACS applied materials interfaces., 6 (10). pp. 7504-7511.Further information on publisher's website:http://dx.doi.org/10.1021/am500882yPublisher's copyright statement:This document is the Accepted Manuscript version of a Published Work that appeared in nal form in ACS Applied Materials Interfaces, copyright c American Chemical Society after peer review and technical editing by the publisher. To access the nal edited and published work see http://pubs.acs.org/doi/abs/10.1021/am500882y. Additional information:Use policyThe full-text may be used and/or reproduced, and given to third parties in any format or medium, without prior permission or charge, for personal research or study, educational, or not-for-pro t purposes provided that:• a full bibliographic reference is made to the original source • a link is made to the metadata record in DRO • the full-text is not changed in any way The full-text must not be sold in any format or medium without the formal permission of the copyright holders.Please consult the full DRO policy for further details. be further enhanced by the incorporation of surface roughness to an extent that it reaches a sufficiently high level (water contact angle <10° and hexadecane contact angle >110°) which, when combined with the inherent ultra-fast switching speed, yields oil-water mixture separation efficiencies exceeding 98%.

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“…This is due to the higher surface tension of water, which results in the respective Young's contact angles 20 satisfying θ water > θ oil . A few studies 14,[21][22][23][24][25][26] have reported surfaces where θ water < θ oil , which was achieved by using specific interactions between water and the substrate to lower the solid-liquid interfacial tension (γ sl ). However, with two exceptions 14,25 all such surfaces were oleophilic.…”

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confidence: 99%

Hygro-responsive membranes for effective oil–water separation

et al. 2012

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There is a critical need for new energy-efficient solutions to separate oil-water mixtures, especially those stabilized by surfactants. Traditional membrane-based separation technologies are energy-intensive and limited, either by fouling or by the inability of a single membrane to separate all types of oil-water mixtures. Here we report membranes with hygro-responsive surfaces, which are both superhydrophilic and superoleophobic, in air and under water. our membranes can separate, for the first time, a range of different oil-water mixtures in a singleunit operation, with >99.9% separation efficiency, by using the difference in capillary forces acting on the two phases. our separation methodology is solely gravity-driven and consequently is expected to be highly energy-efficient. We anticipate that our separation methodology will have numerous applications, including the clean-up of oil spills, wastewater treatment, fuel purification and the separation of commercially relevant emulsions.

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Self‐Cleaning and Anti‐Fog Surfaces via Stimuli‐Responsive Polymer Brushes

Cited by 260 publications

References 51 publications

A structural definition of polymer brushes

A structural definition of polymer brushes

Ultrafast Oleophobic–Hydrophilic Switching Surfaces for Antifogging, Self-Cleaning, and Oil–Water Separation

Hygro-responsive membranes for effective oil–water separation

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