A greener approach to design Janus PVDF membrane with polyphenols using one-pot fabrication for emulsion separation

Ling, Lee Sher; Thomas, Joy; Liu, Chengliang; Tung, Kuo‐Lun

doi:10.1016/j.memsci.2022.120616

Cited by 26 publications

(4 citation statements)

References 52 publications

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“…After the treatment of NaIO 4 , the chemical reaction of TA-PLS layer was accelerated . Besides, the carboxylic groups were generated after oxidation. ,− This modification approach was applied to membranes of different materials, and the changes in contact angle reflected the successful modification on PES, PAN, and PVDF membranes (Figure S7).…”

Section: Resultsmentioning

confidence: 99%

Lysine-Sarcosine PiPo Functionalized Surface with Excellent Hemocompatibility

Hao

Cui

Fang

et al. 2023

ACS Appl. Mater. Interfaces

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Polysarcosine (PSar) is an electrically neutral and excellently hydrophilic polypeptoid showing limited interaction with proteins and cells, which possesses better biocompatibility compared with polyethylene glycol. However, the immobilization of PSar is difficult due to the high water solubility. Herein, lysine-sarcosine PiPo, which was the random copolymer of lysine and sarcosine (PLS), was synthesized via a phosgene-free and water-tolerable polymerization of N-phenyloxycarbonyl-amino acids for the first time. PLS was immobilized by tannic acid (TA) on the polysulfone (PSf) membrane for a short time to obtain a neutral surface. The modified membrane showed improved hydrophilicity, decreased protein adsorption, and low cytotoxicity. Moreover, barely any hemolysis, no platelet adhesion, prolonged clotting time, and low complement activation further suggested good hemocompatibility. In order to improve the antifouling ability of the membrane under pressure, the neutral surface was oxidized by sodium periodate, which accelerated the chemical reaction between amino groups in PLS and phenolic hydroxyl groups in TA. Meanwhile, carboxyl groups generated due to the decomposition of TA and a negatively charged surface were obtained. While maintaining the good properties of the unoxidized one, the hydrophilicity of the oxidized membrane was improved and the clotting time was further prolonged. Besides, the filtration recovery of the oxidized membrane was improved remarkably. This approach of rapid immobilization of PSar has great potential for applications in the biomedical area, especially for blood-contacting materials.

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Section: Resultsmentioning

confidence: 99%

Lysine-Sarcosine PiPo Functionalized Surface with Excellent Hemocompatibility

Hao

Cui

Fang

et al. 2023

ACS Appl. Mater. Interfaces

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“…Surface roughness plays a significant role in wetting characteristics, and the micro/nanostructure of the hydrophilic surface can endow the synthetic membrane with superhydrophilic properties. ,, The influence of PCA and PPDA introduced by AFM analysis on the membrane surface roughness is shown in Figure b. The commercial PVDF membrane was a porous membrane structure, resulting in the roughness of the surface.…”

Section: Resultsmentioning

confidence: 99%

Rapid Construction of Caffeic Acid/p-Phenylenediamine Antifouling Hydrophilic Coating on a PVDF Membrane for Emulsion Separation

Tong,

Miao,

Ding

et al. 2023

Langmuir

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The current methods of constructing modification strategies for hydrophilic membranes are time-consuming, complex in operation, and poor in universality, which limit their application on membranes. In this work, inspired by the adhesion properties and versatility of caffeic acid (CA) and p-phenylenediamine (PPDA), a simple, rapid, and universal method was designed for the separation of oil-in-water emulsion by preparing a stable hydrophilic coating separation membrane. The preparation time of the membrane was shortened to 40 min. The developed PVDF–PCA/PPDA membrane showed superhydrophilic and underwater superoleophobic properties. When applied to petroleum ether-in-water emulsion, isooctane-in-water emulsion, and dodecane-in-water emulsion separation, the oil rejection was more than 99.0%. In the circulating separation of 10 g/L soybean oil-in-water emulsion, the oil rejection was more than 99.3%, and the highest flux was 1036 L·m–2·h–1. The prepared PVDF–PCA/PPDA membrane performed well in the separation test of oily wastewater. The proposed strategy is simple and rapid; it may become a universal method for preparing membranes with super strong antifouling properties against viscous oil and accelerate the research progress of membrane separation of oil-in-water emulsions.

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“…Most nanoparticles of conventional co-blended photocatalytic membranes are inevitably embedded in the native polymer and thus cannot be used to contact the reactant system for catalysis [15,16]. In order to expand the functionalization of membranes for applications, there is an urgent need to find new methods to stably link nanoparticles to the substrate membrane material [17].…”

Section: Introductionmentioning

confidence: 99%

A New Strategy of Chemical Photo Grafting Metal Organic Framework to Construct NH2-UiO-66/BiOBr/PVDF Photocatalytic Membrane for Synergistic Separation and Self-Cleaning Dyes

Peng,

Shu,

Jiang

et al. 2023

Molecules

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Photocatalytic membranes are typical multifunctional membranes that have emerged in recent years. The lack of active functional groups on the surface of membranes made of inert materials such as polyvinylidene fluoride(PVDF) makes it difficult to have a stable binding interaction with photocatalysts directly. Therefore, in this study, we developed a simple method to prepare NH2-UiO-66/BiOBr/PVDF(MUB) membranes for efficient dye treatment by grafting benzophenolic acid-functionalized NH2-UiO-66 onto the surface of membranes with photocatalytic properties under visible light irradiation using benzophenolic acid with photoinitiating ability as an anchor. The structural characteristics, photocatalytic properties, antifouling properties, and reusability of the composite membranes were investigated in subsequent experiments using a series of experiments and characterizations. The results showed that the benzophenone acid grafting method was stable and the nanoparticles were not easily dislodged. The MUB composite membrane achieved a higher dye degradation efficiency (99.2%) than the pristine PVDF membrane at 62.9% within a reaction time of 180 min. In addition, the composite membranes exhibited higher permeate fluxes for both pure and mixed dyes and also demonstrated outstanding water flux recovery (>96%) after the light self-cleaning cycle operation. This combination proved to improve the performance of the membranes instead of reducing them, increasing their durability and reusability, and helping to broaden the application areas of membrane filtration technology.

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A greener approach to design Janus PVDF membrane with polyphenols using one-pot fabrication for emulsion separation

Cited by 26 publications

References 52 publications

Lysine-Sarcosine PiPo Functionalized Surface with Excellent Hemocompatibility

Lysine-Sarcosine PiPo Functionalized Surface with Excellent Hemocompatibility

Rapid Construction of Caffeic Acid/p-Phenylenediamine Antifouling Hydrophilic Coating on a PVDF Membrane for Emulsion Separation

A New Strategy of Chemical Photo Grafting Metal Organic Framework to Construct NH2-UiO-66/BiOBr/PVDF Photocatalytic Membrane for Synergistic Separation and Self-Cleaning Dyes

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