Surface hydrophilic modification of PVDF membranes by trace amounts of tannin and polyethyleneimine

Liu, Cong; Wu, Lili; Zhang, Chaocan; Chen, Wanyu; Luo, Sisi

doi:10.1016/j.apsusc.2018.06.131

Cited by 80 publications

(36 citation statements)

References 40 publications

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“…PEI had a higher cation density, and the reactive secondary amino group of PEI could easily undergo Michael addition or Schiff base reaction with the quinone group to form the cross-linked TA/PEI nanoparticles. 35−37 The large number of phenolic hydroxyl groups led to TA–metal chelating features and promoted chelating sites for Ti 4+ ions. This metal coordination was beneficial to the biomimetic mineralization of titania.…”

Section: Resultsmentioning

confidence: 99%

Constructing Antifouling Hybrid Membranes with Hierarchical Hybrid Nanoparticles for Oil-in-Water Emulsion Separation

et al. 2019

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The development of antifouling membranes plays a vital role in the widespread application of membrane technology, and the hybridization strategy has attracted a significant amount of attention for antifouling applications. In this work, TA/PEI@TiO 2 hierarchical hybrid nanoparticles (TPTi HHNs) are first synthesized through a simple strategy combining the multiple catechol chemistries of phenolic tannic acid (TA) with the biomimetic mineralization chemistry of titania. The TPTi HHNs are used as nanofillers to prepare PVDF/TPTi hybrid membranes. The TPTi HHNs endow the membrane with higher porosity, hierarchical roughness, greater hydrophilicity, and underwater superoleophobicity. Upon TPTi HHN loading, the PVDF/TPTi hybrid membranes exhibit enhanced antifouling performance. The flux recovery ratio can reach 92% when utilized to separate oil-in-water emulsion. Even being applied to the three-cycle filtration of oil-in-water emulsion with much higher concentration, the PVDF/TPTi membrane can still maintain a high flux recovery ratio about 85%. This study will provide a facial polyphenol-based platform to fabricate antifouling hybrid nanofillers and antifouling hybrid membranes with promising applications in oil/water separation.

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Section: Resultsmentioning

confidence: 99%

Constructing Antifouling Hybrid Membranes with Hierarchical Hybrid Nanoparticles for Oil-in-Water Emulsion Separation

et al. 2019

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“…45,89 As for membrane modification based on plant polyphenol-PEI coating for oily emulsion separation, Liu et al modified hydrophobic PVDF membrane with trace amount of TA, PEI and (3-cholropropyl) trimethoxysilane (CTS). 69 CTS and PEI was first adhered on membrane surface, and then TA was cross-linked with PEI to form a composite hydrophilic layer with good antifouling property. Notably, CTS, an intermediate of silane coupling agent, can accelerate the deposition of PEI, 90 thus improving coating hydrophilicity and stability with lower concentration of ingredients.…”

Section: Polyethyleneiminementioning

confidence: 99%

Recent advances in membrane hydrophilic modification with plant polyphenol‐inspired coatings for enhanced oily emulsion separation

Huang

Yin

Zhang

et al. 2021

J of Applied Polymer Sci

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Oily wastewater, especially the emulsified one, causes serious environment pollution and poses threats to the ecosystem and resource recycling. Among various filtration media, porous polymeric membranes have gained tremendous attention in dealing with oily emulsions due to their energy-saving, costeffective, and highly efficient features. However, to alleviate membrane fouling by oil droplets and ensure high separation efficiency, endowing membrane with superhydrophilicity and underwater superoleophobicity via facile strategy is highly desired. Taking advantages of the mild forming conditions, universality and cost-efficiency, more and more efforts have been devoted to membrane hydrophilic modification by plant polyphenol-inspired coatings in recent years. In this review, we focus on recent advances in constructing plant polyphenolinvolved coatings on membrane surface for oil-in-water emulsion separation. The interactions between plant polyphenol and functional materials including amino-functionalized materials, transition metal ions and oxidants via covalent chemistry, coordination chemistry, and rapid oxidation are highlighted. In addition, the impacts of the resultant coating on the wettability, oily emulsion separation performance, and anti-oil fouling performance of the modified membrane are systematically summarized. Finally, future outlooks in membrane surface engineering with plant polyphenol-involved coatings are discussed to further broaden the research related to high-efficiency oil/water separation based on membrane technology.

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“…PVDF membranes have been widely applied in ultrafiltration and microfiltration processes for general separation purposes and are currently being investigated as potential candidates for use in membrane distillation and membrane contractors [ 27 ]. Polyphenolic compounds, such as tannin, are potential candidates for the development of PVDF surface coating processes [ 28 ]. The conversion of the hydrophobic character of PVDF to hydrophilic was achieved by electron beam grafting and subsequent sulfonation.…”

Section: Introductionmentioning

confidence: 99%

Antibacterial Properties of Plasma-Activated Perfluorinated Substrates with Silver Nanoclusters Deposition

et al. 2021

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This article is focused on the evaluation of surface properties of polytetrafluoroethylene (PTFE) nanotextile and a tetrafluoroethylene-perfluoro(alkoxy vinyl ether) (PFA) film and their surface activation with argon plasma treatment followed with silver nanoclusters deposition. Samples were subjected to plasma modification for a different time exposure, silver deposition for different time periods, or their combination. As an alternative approach, the foils were coated with poly-L-lactic acid (PLLA) and silver. The following methods were used to study the surface properties of the polymers: goniometry, atomic force microscopy, and X-ray photoelectron microscopy. By combining the aforementioned methods for material surface modification, substrates with antibacterial properties eliminating the growth of Gram-positive and Gram-negative bacteria were prepared. Studies of antimicrobial activity showed that PTFE plasma-modified samples coated with PLLA and deposited with a thin layer of Ag had a strong antimicrobial effect, which was also observed for the PFA material against the bacterial strain of S. aureus. Significant antibacterial effect against S. aureus, Proteus sp. and E. coli has been demonstrated on PTFE nanotextile plasma-treated for 240 s, coated with PLLA, and subsequently sputtered with thin Ag layer.

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Surface hydrophilic modification of PVDF membranes by trace amounts of tannin and polyethyleneimine

Cited by 80 publications

References 40 publications

Constructing Antifouling Hybrid Membranes with Hierarchical Hybrid Nanoparticles for Oil-in-Water Emulsion Separation

Constructing Antifouling Hybrid Membranes with Hierarchical Hybrid Nanoparticles for Oil-in-Water Emulsion Separation

Recent advances in membrane hydrophilic modification with plant polyphenol‐inspired coatings for enhanced oily emulsion separation

Antibacterial Properties of Plasma-Activated Perfluorinated Substrates with Silver Nanoclusters Deposition

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