Preparation and hydrophobicity modification of poly(vinylidene fluoride‐<scp><i>co</i></scp>‐hexafluoropropylene) membranes for pervaporation separation of volatile organic compound from water

Miranmousavi, H.; Saljoughi, Ehsan; Mousavi, Seyed Mahmoud; Kiani, Shirin

doi:10.1002/pc.26178

Cited by 13 publications

(10 citation statements)

References 57 publications

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“…[5][6][7][8] Due to its high mechanical strength, thermal stability, chemical resistance, hydrophobicity, and excellent electroactive properties, poly(vinylidene fluoride) (PVDF) is being used in a wide range of engineering applications. [9][10][11][12][13] PVDF has also been extensively used in the films and coatings industry. [14][15][16] One of the critical features of PVDF is that this polymer can be processed to take different types of crystal phases, including α, γ, β, δ, and ε.…”

Section: Introductionmentioning

confidence: 99%

Poly(vinylidene fluoride)/molybdenum disulfide nanocomposite coatings: Studying the surface properties and corrosion protection

Ramezani

Seyfi²,

Aghjeh

et al. 2022

Polymer Composites

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Robust nanocomposite coatings based on polyvinylidene fluoride (PVDF) and molybdenum disulfide (MoS 2 ) nanoplatelets were prepared by a spray coating method. To achieve various surface structures, the coatings were dried at room and oven temperatures (20 and 200 C). All the samples dried at room temperature exhibited a highly porous surface structure, attributed to the strong nonsolvent role of water vapor, which triggered the nonsolvent-induced phase separation (VIPS). On the other hand, the oven-dried coatings showed a dense structure with no pores, resulting from eliminating the VIPS process by enhancing the drying temperature. MoS 2 nanoplatelets were localized at the surface layer and the adjacent beneath layers. The formation of α-type PVDF crystals was intensified for the oven-dried samples based on the surface morphology and X-ray diffraction patterns. Roughness analysis demonstrated that MoS 2 nanoplatelets interfere with the phase separation process leading to a lower porosity for the room-dried coatings. The elimination of porosity by increasing the drying temperature caused the hydrophobicity of the coatings to be notably decreased. Polarization and electrochemical impedance spectroscopy results revealed that both polymeric and nanocomposite coatings improved the corrosion resistance of the aluminum substrates, and the ovendried pure PVDF coating exhibited the highest level of corrosion protection.

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Section: Introductionmentioning

confidence: 99%

Poly(vinylidene fluoride)/molybdenum disulfide nanocomposite coatings: Studying the surface properties and corrosion protection

Ramezani

Seyfi²,

Aghjeh

et al. 2022

Polymer Composites

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“…. In general, applications of the PV process may be classified into the following three categories [4,5,11,[16][17][18][19]:…”

Section: Introductionmentioning

confidence: 99%

“…However, in spite of the above advantages of nanocomposite membranes, there are a few limitations which cannot be neglected. One of the main In general, applications of the PV process may be classified into the following three categories [4,5,11,[16][17][18][19]:…”

Section: Introductionmentioning

confidence: 99%

Effect of Nanofillers on Properties and Pervaporation Performance of Nanocomposite Membranes: A Review

et al. 2022

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In recent years, a well-known membrane-based process called pervaporation (PV), has attracted remarkable attention due to its advantages for selective separation of a wide variety of liquid mixtures. However, some restrictions of polymeric membranes have led to research studies on developing membranes for efficient separation in the PV process. Recent studies have focused on preparation of nanocomposite membranes as an effective method to improve both selectivity and permeability of polymeric membranes. The present study provides a review of PV nanocomposite membranes for various applications. In this review, recent developments in the field of nanocomposite membranes, including the fabrication methods, characterization, and PV performance, are summarized.

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“…Therefore, fluorinated PDMS with good hydrophobicity became a better choice for acetone separation in fermentation broth. Stefano, Buddhima, Yu, Seth, and Haniyeh et al [11][12][13][14][15] have down a lot of fluorinated PDMS membrane related work.…”

Section: Introductionmentioning

confidence: 99%

“…Stefano, Buddhima, Yu, Seth, and Haniyeh et al. [ 11–15 ] have down a lot of fluorinated PDMS membrane related work.…”

Section: Introductionmentioning

confidence: 99%

Molecular Dynamics Simulation for Separation Performance of PDMS/Fluorosilane Membrane with Different Mass Ratios in Acetone–Water Mixture

Lan

Song

Wang

2022

Macro Theory & Simulations

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Polydimethylsiloxane (PDMS) membrane in suitable-fluorinated level have excellent pervaporation performance as well as antibiological contamination performance. The pervaporation membranes with different PDMS/fluorosilane mass ratios, the adsorption and dissolution behaviors of acetone molecules on the membrane surface, as well as the diffusion and permeation behaviors in the membranes are studied by all-atom molecular dynamics simulation (AAMDS). The results show that when the mass ratio of PDMS/fluorosilane is 100/20, the surface solubility of acetone is 11.711 (J cm −3 ) 0.5 , and the interfacial interaction is −16897.0415 kcal mol −1 , both of which are the highest. The results of wide-angle X-ray diffraction (WAXD) showed that there are amorphous regions in the membranes suitable for acetone penetration. The maximum chain spacing of the PDMS/fluorosilane(100/20)_membranes is 10.8482 Å, and the free volume fraction (FFV) is 3.03%, both of which are the largest. The change rate of long-term mean square displacement (MSD) in PDMS/fluorosilane(100/20)_Membrane with time is 0.45269. The Young's modulus E, shear modulus G, volume modulus K, and Poisson's ratio 𝝂 of PDMS/fluorosilane(100/20)_Membrane are 0.3249, 0.4061, 0.0492 GPa and -0.5999, respectively. The elasticity of the membrane enhances the diffusion behavior of acetone molecules, and the self-diffusion coefficient of acetone in the membrane is 0.07545 Å 2 ps −1 .

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Preparation and hydrophobicity modification of poly(vinylidene fluoride‐co‐hexafluoropropylene) membranes for pervaporation separation of volatile organic compound from water

Cited by 13 publications

References 57 publications

Poly(vinylidene fluoride)/molybdenum disulfide nanocomposite coatings: Studying the surface properties and corrosion protection

Poly(vinylidene fluoride)/molybdenum disulfide nanocomposite coatings: Studying the surface properties and corrosion protection

Effect of Nanofillers on Properties and Pervaporation Performance of Nanocomposite Membranes: A Review

Molecular Dynamics Simulation for Separation Performance of PDMS/Fluorosilane Membrane with Different Mass Ratios in Acetone–Water Mixture

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