Novel membranes with extremely high permeability fabricated by 3D printing and nickel coating for oil/water separation

Han, Lei; Chen, Cheng; Shen, Liguo; Lin, Hongjun; Li, Bisheng; Huang, Zijun; Xu, Yanchao; Li, Renjie; Hong, Huachang

doi:10.1039/d2ta01971j

Cited by 95 publications

(14 citation statements)

References 49 publications

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“…But the intensity of the peak has changed. The relative crystallinity ( R c ) of PEEK at different aging times is calculated according to formula () in the literature, 17 and is listed in Figure 2b, the figure shows that the ratio of 1280 and 1310 cm −1 bands decreased rapidly at the early stage of aging, and decreased slowly at the late stage of aging. This is due to the rapid oxidation of the main surface of the sample at the early stage of aging, which led to the rapid decline of its relative crystallinity.…”

Section: Resultsmentioning

confidence: 99%

Effect of thermal oxygen aging on the crystallization and insulation properties of polyether ether ketone

2023

J of Applied Polymer Sci

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As an engineering material, polyether ether ketone (PEEK) has been widely used in many fields. It is important to study its thermal oxidative aging law for its material service optimization. The changes of chemical structure and relative properties of PEEK sheets after thermal oxygen aging at 280 C for different times were measured by universal tensile machine, Fourier transform infrared spectroscopy, thermogravimetric analysis, differential scanning calorimetry, and resistance meter. The results showed that the elongation at break of the aged samples decreased with the extension of thermal aging time, while the tensile strength continuously increased within 336 h of thermal aging and then decreased gradually. Moreover, the crystallization temperature, melting enthalpy, and crystallinity of the samples decreased with the increase of thermal aging time. The crystallinity decreased to 2.3% after 2852 h aging and the initial decomposition temperature and the maximum decomposition temperature of PEEK gradually decreased from 554.3 to 523.5 C and 572.9 to 558.2 C, respectively. The increase of tan δ was more significant in the low frequency band (10 À2 -10 1 ) Hz. With the increase of aging time, the zeta potential of PEEK surface constantly moved to the negative direction and the volume resistivity and the dielectric strength similarly increased first and then decreased.

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Section: Resultsmentioning

confidence: 99%

Effect of thermal oxygen aging on the crystallization and insulation properties of polyether ether ketone

2023

J of Applied Polymer Sci

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“…An ultrasonically pretreated Ni@PVDF membrane was modified by electroless nickel plating as previously reported. , The schematic is depicted in Figure S1, with a detailed description of materials and experimental processes in the SI. The surface morphologies of bare PVDF, prepared Ni@PVDF, and fouled Ni@PVDF membranes were observed by environmental scanning electron microscopy–energy-dispersive spectroscopy (ESEM–EDS, Quanta FEG 250, FEI, America), and surface chemical composition information of prepared Ni@PVDF membranes was analyzed by an X-ray photoelectron spectrometer (XPS, PHI 5000 VersaProbe III, Ulvac-Phi, Japan) with a monochromatic Al K X-ray source.…”

Section: Methodsmentioning

confidence: 99%

“…In this study, we proposed an effective membrane antifouling strategy based on the dielectrophoresis force. To put our hypothesis to the test, the Ni@PVDF conductive membrane was fabricated by electroless plating of nickel onto the PVDF UF membrane, , which was utilized as one electrode to employ DC or AC to construct a nonuniform electric field over the feed side of filtration. We systematically designed a flow-through electro-filtration experiment for three types of colloidal pollutants with different dielectric constants or conductivities.…”

Section: Introductionmentioning

confidence: 99%

Dielectrophoresis-Based Universal Membrane Antifouling Strategy toward Colloidal Foulants

Liu

Xia

Zhao

et al. 2022

Environ. Sci. Technol.

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Membrane fouling compromises the benefits of membrane technology, leading to its performance deterioration and incremental cost.Coupling with an electric field has been attractive but is limited by the electrical dependence of the electrophoresis (EP) mechanism and undesired faradic reactions. This study reports a universal dielectrophoresis-based (DEP) membrane antifouling strategy for electronegative, electropositive, and neutral colloidal foulants, which depends on the particle polarizability rather than its charge. The porous Ni@PVDF model electroconductive membrane was fabricated to construct a nonuniform electric field inducing DEP, while applying a low voltage avoided side electrochemical reactions. For electronegative SiO 2 (−) and electropositive Al 2 O 3 (+) particles with a lower relative permittivity than the medium water (78), the membrane permeability all remarkably increased by 90.1% under AC/DC (±1.0 V) fields. By contrast, serious membrane fouling occurred for the BaTiO 3 colloids with a higher relative permittivity (∼2000). Notably, the permittivity of nearly all colloids in wastewater treatment is much less than that of water, which makes the dielectrophoresis-based antifouling strategy universal. The theoretical simulation systematically analyzed the forces on particles including DEP, EP, and others, indicating that the formed protected area on the membrane pore wall by DEP forces prevented the irreversible membrane blockage of colloids and facilitated loose cake layer formation for alleviating membrane fouling. In brief, this work reported a hopeful concept for dielectrophoresis-based membrane antifouling and verified its antifouling mechanism.

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“…9e). 85 In addition, various inorganic porous materials have been prepared for the separation of light oil/ water mixtures, such as the Cu 2 S-coated copper mesh, 50 cell- ulose hydrogel-coated nylon mesh, 86 cellulose acetate/PVA/SiO 2 composite membrane, 87 and so on, 17,[88][89][90][91][92][93][94][95][96][97] which are listed in Table 3.…”

Section: Filtration Typementioning

confidence: 99%

Recent advances in superwetting materials for separation of oil/water mixtures

Bai

Yuan

et al. 2023

Nanoscale

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Novel membranes with extremely high permeability fabricated by 3D printing and nickel coating for oil/water separation

Abstract: Traditional membranes for oil-water separation are severely subject to the mutual constraint between the selectivity and permeability. Fabricating membranes with extremely high permeance but high separation efficiency is the eternal...

Cited by 95 publications

References 49 publications

Effect of thermal oxygen aging on the crystallization and insulation properties of polyether ether ketone

Effect of thermal oxygen aging on the crystallization and insulation properties of polyether ether ketone

Dielectrophoresis-Based Universal Membrane Antifouling Strategy toward Colloidal Foulants

Recent advances in superwetting materials for separation of oil/water mixtures

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