Nanocomposite hydrogel engineered hierarchical membranes for efficient oil/water separation and heavy metal removal

Yan, Linlin; Yang, Xiaobin; Zeng, Haoze; Zhao, Yuanyuan; He, X. T.; Ma, Jun; Shao, Lu

doi:10.1016/j.memsci.2022.121243

Cited by 84 publications

(33 citation statements)

References 51 publications

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“…79,80 In this work, using the PFSS creatively addressed this issue, and the as-prepared mineralized materials demonstrated guaranteed stability for advanced applications. In accordance with the previous studies about the mineralized polymeric membrane, 81,82 the PTFE@PFSS@TiO 2 membrane showed a gratifying oil/water separation performance due to the endowed excellent and stable hydrophilic property resulting from the amorphous TiO 2 (Figures S20 and S21). The pristine oil/water emulsion displayed color of milky white, and numerous oil droplets were observed under an optical microscope (Figure S21a);the size of these droplets ranged from 0.1−2 μm (Figure S21b).…”

Section: Pfss-assisted Surface Mineralization Of Polymersupporting

confidence: 90%

Robust and Scalable In Vitro Surface Mineralization of Inert Polymers with a Rationally Designed Molecular Bridge

Zhang

Wang

Xue

et al. 2023

ACS Appl. Mater. Interfaces

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The artificial integration of inorganic materials onto polymers to create the analogues of natural biocomposites is an attractive field in materials science. However, due to significant diversity in the interfacial properties of two kinds of materials, advanced synthesis methods are quite complicated and the resultant materials are always vulnerable to external environments, which limits their application scenarios and makes them unsuitable for scalable production. Herein, we report a simple and universal approach to achieve robust and scalable surface mineralization of polymers using a rationally designed triple functional molecular bridge of fluorosilane, 3-[(perfluorohexyl sulfonyl) amino] propyltriethoxy silane (PFSS). In a twostep solution deposition, the fluoroalkyl and siloxane of the PFSS take charge of its adhesion and immobilization onto polymers by hydrophobic interaction and wrapping-like chemical cross-linking, and then the assembly and growth of inorganic nanoclusters for integration are achieved by strong chemical coordination of PFSS sulfonamide. The versatile mineralization of inorganic oxides (e.g., TiO 2 , SiO 2 , and Fe 2 O 3 ) onto chemically inert polymer surfaces was realized very well. The resultant mineralized materials exhibit robust and multiple functionalities for hostile applications, such as hydrophilic membranes for removing oils in strong acidic and alkaline wastewaters, fabrics with advanced anti-bacteria for healthy wearing, and plates with strong mechanical performance for better use. Experimental results and theoretical calculations confirmed the homogenous distribution of the PFSS onto polymers via cross-linking for robust coordination with inorganic oxides. These results demonstrate a skillful enlightenment in the design of high-performance mineralized polymer materials used as membranes, fabrics, and medical devices.

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Section: Pfss-assisted Surface Mineralization Of Polymersupporting

confidence: 90%

Robust and Scalable In Vitro Surface Mineralization of Inert Polymers with a Rationally Designed Molecular Bridge

Zhang

Wang

Xue

et al. 2023

ACS Appl. Mater. Interfaces

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“…Figures b and S2b present a staged heating method used to recover the shapes of FAS@MS@CS@SMPU and SMPU; it was calculated that the R r and R f of FAS@MS@CS@SMPU were 97.8, 97.8 and 96.6, 94.5%, respectively. A high R r means that the stress could be locked in the material at room temperature, and a high R f implies that the stress could be released slowly through heating. , The above results suggested that after modification with CS and FAS@MS, the FAS@MS@CS@SMPU still had a good SME …”

Section: Resultsmentioning

confidence: 84%

Near-Infrared Light Responsive Surface with Switchable Wettability in Microstructure and Surface Chemistry

et al. 2023

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Intelligent surfaces with reversibly switchable wettability have recently drawn considerable attention. One typical strategy to obtain such a surface is to change the surface chemistry or the microstructure. Herein, we report a new smart surface for which the wettability was controlled by both the surface chemistry and microstructure. Various wetting states were reversibly and precisely controlled through heating, pressing, NIR irradiation, and oxygen plasma treatment. The excellent shape memory characteristics of shape memory polyurethane (SMPU) and the controlled release of hydrophobic/hydrophilic oxygen-containing functional groups contributed to this ability. Microcapsules were used to design these smart surfaces. They controlled the release of a fluorinated alkyl silane (FAS) through shell melting, changed the surface composition, and played a decisive role in protecting the FAS against hydrolysis and evaporation to ensure that the surface’s wettability is recyclable. Controlling of the surface chemistry or microstructure was repeated for at least 19 or 16 cycles, respectively, which indicated excellent repeatability compared to other smart surfaces. Based on the excellent controllability, the surface exhibited multiple functions, such as liquid directional transport and coefficient of friction control. In addition, it maintained this extraordinary ability under harsh environments owing to the great stability of the SMPU and adequate protection of the FAS by the microcapsules. With switchable wettability based on the surface chemistry and microstructure, this work provides a new principle for designing smart surfaces with wettability controlled in two ways.

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“…In the process of oil-water separation, oil is less likely to be contaminated on the surface of the membrane to form oil film, which can further reduce the oil pollution to the membrane and prolong the service life of the membrane. [42] The pure water fluxes of the membranes were shown in Figure 2B. The pure water flux of the commercial PVDF membrane was only 2 L•m −2 •h −1 •bar −1 due to the poor hydrophilicity.…”

Section: Hydrophilicity and Underwater Oleophobicitymentioning

confidence: 98%

Preparation of Poly(acrylic acid‐co‐acrylamide) Hydrogel‐Modified PVDF Membrane and Its Separation and Antibacterial Properties

Zhang

Kong³

et al. 2023

Macro Chemistry & Physics

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Commercial polyvinylidene fluoride (PVDF) microporous membranes are coated with P(AA‐co‐AM) hydrogel with different proportions of acrylic acid (AA) and acrylamide (AM). Thus, P(AA‐co‐AM)/PVDF membranes with good structure and excellent performance are prepared. The surface morphology and structure of P(AA‐co‐AM)/PVDF membranes are characterized by scanning electron microscopy (SEM) and Fourier transform infrared spectroscopy (FT‐IR). The water contact angle (WCA), underwater oil contact angle (UOCA), pure water flux, separation flux, and separation efficiency of P(AA‐co‐AM)/PVDF membranes are measured. The antibacterial properties of P(AA‐co‐AM)/PVDF membranes are tested, and the prepared membranes have good antibacterial activity against E. coli and S. aureus after chlorination. The prepared P(AA‐co‐AM)/PVDF membranes show good hydrophilicity and underwater oleophobicity, and improved separation performance of mud, oil–water emulsion, metal ions, and organic dyes.

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Nanocomposite hydrogel engineered hierarchical membranes for efficient oil/water separation and heavy metal removal

Cited by 84 publications

References 51 publications

Robust and Scalable In Vitro Surface Mineralization of Inert Polymers with a Rationally Designed Molecular Bridge

Robust and Scalable In Vitro Surface Mineralization of Inert Polymers with a Rationally Designed Molecular Bridge

Near-Infrared Light Responsive Surface with Switchable Wettability in Microstructure and Surface Chemistry

Preparation of Poly(acrylic acid‐co‐acrylamide) Hydrogel‐Modified PVDF Membrane and Its Separation and Antibacterial Properties

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