Polydopamine-coated nanofibrous mats as a versatile platform for producing porous functional membranes

Yang, Haowei; Lan, Yue; Wang, Zhu; Li, Weina; Xu, Dan; Cui, Jiecheng; Shen, Dong; Li, Guangtao

doi:10.1039/c2jm33251e

Cited by 105 publications

(75 citation statements)

References 44 publications

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“…70 It is well known that dopamine has a strong adaptability to cover any type of surface through the formation of an adhesive polydopamine layer via selfpolymerization, which can tremendously alter surface properties such as wettability and biocompatibility. [74][75][76][77] In this work, the reverse osmosis membrane coated by the polydopamine layer exhibited a higher flux for oil/water emulsion separation than the one without modification, although there was no obvious change in the membrane hydrophilicity.…”

Section: Surface Modificationmentioning

confidence: 90%

Recent progress in developing advanced membranes for emulsified oil/water separation

2014

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The separation of oily wastewater, especially emulsified oil/water mixtures, is a worldwide challenge because of the large amount of oily wastewater produced in many industrial processes and daily life. For the treatment of oily wastewater, membrane technology is considered the most efficient method because of its high separation efficiency and relatively simple operational process. In this short review, the recent development of advanced filtration membranes for emulsified oil/water mixture separation is presented. We provide an overview on both traditional filtration membranes, including polymer-dominated and ceramic-based filtration membranes, and recently developed nanomaterial-based functional filtration membranes, especially one-dimensional nanomaterials, for effectively treating emulsified oil/water mixtures. The liquid flux and antifouling property, which are the most important factors for membrane performance evaluation, are described for different types of membranes. Conclusions and perspectives concerning the future development of filtration membranes are also provided.

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Section: Surface Modificationmentioning

confidence: 90%

Recent progress in developing advanced membranes for emulsified oil/water separation

2014

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“…C1s spectra can be fitted into four peaks with the corresponding binding energies of C-C, C-O, free O=C-O, and Ag coordinated O=C-O of citrate ( Figure S2). 23,24 Thus, based on electronic effect and steric effect, the interface structure as shown in the cartoon (Figure 1) was suggested. Citrate ligand capped the thermodynamic-stabilized AgNPs through the coordination of two carboxyl groups to the surface Ag atoms.…”

Section: Results and Discussion Characterization Of Agnpsmentioning

confidence: 99%

“…This suggested that instead of citrate, the ligands of MPA, MHA, and MPS anchored to the surface of AgNPs through the coordination between thiol groups and Ag atom, thus forming MPA@ AgNPs, MHA@AgNPs, and MPS@AgNPs, respectively. 23,24 In addition, the S2p spectra of MPS@AgNPs showed a fitted peak at 167.9 eV assigned to the sulfonic acid group of MPS molecule. 25 The free carboxyl groups and sulfonic acid in outer layers of AgNPs endowed them with the negatively charged surfaces, and the zeta potentials in water were -34.5 mV for MPA@AgNPs, -29.1 mV for MHA@ AgNPs, and -32.6 mV for MPS@AgNPs.…”

mentioning

confidence: 99%

Surface ligand controls silver ion release of nanosilver and its antibacterial activity against <em>Escherichia coli</em>

Long¹,

Hu²,

Yan³

et al. 2017

IJN

121

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Understanding the mechanism of nanosilver-dependent antibacterial activity against microorganisms helps optimize the design and usage of the related nanomaterials. In this study, we prepared four kinds of 10 nm-sized silver nanoparticles (AgNPs) with dictated surface chemistry by capping different ligands, including citrate, mercaptopropionic acid, mercaptohexanoic acid, and mercaptopropionic sulfonic acid. Their surface-dependent chemistry and antibacterial activities were investigated. Owing to the weak bond to surface Ag, short carbon chain, and low silver ion attraction, citrate-coated AgNPs caused the highest silver ion release and the strongest antibacterial activity against Escherichia coli , when compared to the other tested AgNPs. The study on the underlying antibacterial mechanisms indicated that cellular membrane uptake of Ag, NAD + /NADH ratio increase, and intracellular reactive oxygen species (ROS) generation were significantly induced in both AgNP and silver ion exposure groups. The released silver ions from AgNPs inside cells through a Trojan-horse-type mechanism were suggested to interact with respiratory chain proteins on the membrane, interrupt intracellular O 2 reduction, and induce ROS production. The further oxidative damages of lipid peroxidation and membrane breakdown caused the lethal effect on E. coli . Altogether, this study demonstrated that AgNPs exerted antibacterial activity through the release of silver ions and the subsequent induction of intracellular ROS generation by interacting with the cell membrane. The findings are helpful in guiding the controllable synthesis through the regulation of surface coating for medical care purpose.

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“…3,4,5,6,7,8 Existing methods for the removal or collection of oils from an oil-water mixture utilise absorbent materials 9 such as zeolites, 10,11 organoclays, 12 non-woven polypropylene, 13,14 or natural fibres 15 (such as straw, 16 cellulose, 14 or wool 17 ).…”

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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Polydopamine-coated nanofibrous mats as a versatile platform for producing porous functional membranes

Cited by 105 publications

References 44 publications

Recent progress in developing advanced membranes for emulsified oil/water separation

Recent progress in developing advanced membranes for emulsified oil/water separation

Surface ligand controls silver ion release of nanosilver and its antibacterial activity against <em>Escherichia coli</em>

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

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