A catechol-based biomimetic strategy combined with surface mineralization to enhance hydrophilicity and anti-fouling property of PTFE flat membrane

Xue, Shaolin; Li, Chengcai; Li, Jiuming; Zhu, Hailin; Guo, Yuhai

doi:10.1016/j.memsci.2016.11.075

Cited by 90 publications

(45 citation statements)

References 38 publications

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“…There are various methods to improve the hydrophilicity of the membrane, including surface modification, blending and fabricating nanocomposite membranes. [17,23,30,32,52,54,57,59,72,74,75,77,80,90,97,98,[106][107][108][109][110][111][112][113] Surface hydrophilization. The surface hydrophilicity of a membrane can be increased by surface modification, e.g., introducing hydrophilic polymers or nanoparticles on the membrane surface.…”

Section: General Method: Improving Surface Hydrophilicitymentioning

confidence: 99%

Antifouling membranes for oily wastewater treatment: Interplay between wetting and membrane fouling

Huang

Ras

Tian

2018

Current Opinion in Colloid & Interface Science

281

113

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Oily wastewater is an extensive source of pollution to soil and water, and its harmless treatment is of great importance for the protection of our aquatic ecosystems. Membrane filtration is highly desirable for removing oil from oily water because it has the advantages of energy efficiency, easy processing and low maintenance cost. However, membrane fouling during filtration leads to severe flux decline and impedes long-term operation of membranes in practical wastewater treatment. Membrane fouling includes reversible fouling and irreversible fouling. The fouling mechanisms have been explored based on classical fouling models, and on oil droplet behaviors (such as droplet deposition, accumulation, coalescence and wetting) on the membranes. Membrane fouling is dominated by droplet-membrane interaction, which is influenced by the properties of the membrane (e.g., surface chemistry, structure and charge) and the wastewater (e.g., compositions and concentrations) as well as the operation conditions. Typical membrane antifouling strategies, such as surface hydrophilization, zwitterionic polymer coating, photocatalytic decomposition and electrically enhanced antifouling are reviewed, and their cons and pros for practical applications are discussed.

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Section: General Method: Improving Surface Hydrophilicitymentioning

confidence: 99%

Antifouling membranes for oily wastewater treatment: Interplay between wetting and membrane fouling

Huang

Ras

Tian

2018

Current Opinion in Colloid & Interface Science

281

113

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“…Superhydrophilic surfaces have been investigated for their potential to provide antifogging, 1 self-cleaning 2 and antifouling devices, 3 and oil/water separation 4,5 while superhydrophobic surfaces have been prepared due to their potential applications such as self-cleaning, 6 anti-icing, 7 and anti-corrosion. 8 In recent researches, several methods have been successfully developed to produce superhydrophobicity on various substrates, including electrodeposition on copper, 9 laser irradiation and annealing process on ZrO 2, 10 micro-arc oxidation and subsequent treatment in PFOTS solution on titanium substrate, 11 the anodization process and exposed in hexamethyldisilazane vapor on alumina 12 and sol-gel spin coating method on glass.…”

Section: Funding Informationmentioning

confidence: 99%

“…A superhydrophilic surface is generally defined as exhibiting a water contact angle (WCA) of less than 5° and a superhydrophobic surface is one in which the WCA is greater than 150°. Superhydrophilic surfaces have been investigated for their potential to provide antifogging, self‐cleaning and antifouling devices, and oil/water separation while superhydrophobic surfaces have been prepared due to their potential applications such as self‐cleaning, anti‐icing, and anti‐corrosion …”

Section: Introductionmentioning

confidence: 99%

Superhydrophilic/superhydrophobic surfaces fabricated by spark‐coating

Kumpika

Kantarak

Sroila

et al. 2018

Surface & Interface Analysis

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In this study, the authors researched the preparations of superhydrophilic/superhydrophobic surfaces on commercial cup stock polyethylene coated papers by using sparked aluminum nanoparticles deposited on substrates through a sparking process. In this stage, the surface was porous and showed superhydrophilic properties. The samples were then annealed in air at various temperatures and some transformed to superhydrophobicity. It is well known that a suitable roughness in combination with low surface energy has been required to obtain superhydrophobic surfaces. Therefore, it is believed that during annealing process, when polyethylene is diffused from the substrate through the nanoparticle films and the superhydrophobic characteristics were created. The scanning electron microscope images showed that the film surfaces had a fluffy structure for both the as‐deposited and the annealed samples. However, the atomic force microscopy phase images showed completely different surface properties. Moreover, the X‐ray photoelectron spectroscopy spectra showed different surface chemical compositions. The experimental results revealed that the working temperature to produce superhydrophobic surfaces depended on the sparked film thickness. Furthermore, in order to prove the assumption explained above, glass and poly (methyl methacrylate) were also used as substrates.

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“…The water contact angle of the PTFE membrane dropped from 135 ± 1.4° of the pristine membrane to 18.26 ± 2.2°, and the permeate flux increased from 4000.0 L/m 2 •h to 9750.3 L/ m 2 •h, due to hydrophilization effect and the opened smallest pores for water. The obtained hydrophilized PTFE membrane showed an excellent anti-fouling performance to oils [11]. Also, the polymerized dopamine (PDA) and PEI deposited onto PTFE hollow fiber membrane via co-deposition endowed the membrane greatly improved hydrophilicity and water permeate fluxes [21].…”

Section: Introductionmentioning

confidence: 99%

“…Membrane fouling has largely impeded the widespread application of membrane process. Thus, numerous researches concentrated on developing a membrane with high anti-fouling properties, including manipulating or improving membrane surface charge, roughness, hydrophilicity and so on [8][9][10][11]. Hydro-philization of membrane surface has been regards as an efficient way to improve membrane's anti-fouling property.…”

Section: Introductionmentioning

confidence: 99%

Evaluating the anti-fouling property of the hydrophilically modified porous PTFE membrane

Zhao¹,

Qin²,

Zhao³

et al. 2019

Desalination and Water Treatment

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a b s t r a c tThe flat sheet PTFE membrane was modified into hydrophilicity via deposition of fluorinated cationic surfactant. The anti-fouling property of the membranes was investigated using lysozyme (LYS) and humic acid (HA) as typical foulants and further evaluated by Derjaguin-Landau-Verwey-Overbeek (XDLVO) theory. The results indicated that the wettability of the PTFE membrane can be manipulated by concentration of surfactant solution, and the super hydrophilic membrane with water contact angle of 2.1° was obtained with 0.8 wt% of surfactant solution. The super hydrophilic PTFE membrane showed highest cleaning efficiency of 62.5% and better anti-fouling property. XDLVO analysis further suggested that the super hydrophilic PTFE membrane had the strong repulsion force to HA and LYS and displayed better anti-fouling property due to the highest positive total interaction energy (ΔG TOT ) value. Linearly fitting on membrane practical fouling process and XDLVO results proved the consistency of the XDLVO theory with the practical anti-fouling process. 0 0 0 W W J J J J J J

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A catechol-based biomimetic strategy combined with surface mineralization to enhance hydrophilicity and anti-fouling property of PTFE flat membrane

Cited by 90 publications

References 38 publications

Antifouling membranes for oily wastewater treatment: Interplay between wetting and membrane fouling

Antifouling membranes for oily wastewater treatment: Interplay between wetting and membrane fouling

Superhydrophilic/superhydrophobic surfaces fabricated by spark‐coating

Evaluating the anti-fouling property of the hydrophilically modified porous PTFE membrane

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