Preparation and Electrochemical Characterization of Organic–Inorganic Hybrid Poly(Vinylidene Fluoride)-SiO2 Cation-Exchange Membranes by the Sol-Gel Method Using 3-Mercapto-Propyl-Triethoxyl-Silane

A new synthesis method for organic–inorganic hybrid Poly(vinylidene fluoride)-SiO2 cation-change membranes (CEMs) is proposed. This method involves mixing tetraethyl orthosilicate (TEOS) and 3-mercapto-propyl-triethoxy-silane (MPTES) into a polyvinylidene fluoride (PVDF) sol-gel solution. The resulting slurry was used to prepare films, which were immersed in 0.01 M HCl, which caused hydrolysis and polycondensation between the MPTES and TEOS. The resulting Si-O-Si polymers chains intertwined and/or penetrated the PVDF skeleton, significantly improving the mechanical strength of the resulting hybrid PVDF-SiO2 CEMs. The -SH functional groups of MPTES oxidized to-SO3H, which contributed to the excellent permeability of these CEMs. The surface morphology, hybrid structure, oxidative stability, and physicochemical properties (IEC, water uptake, membrane resistance, membrane potential, transport number, and selective permittivity) of the CEMs obtained in this work were characterized using scanning electron microscope and Fourier transform infrared spectroscopy, as well as electrochemical testing. Tests to analyze the oxidative stability, water uptake, membrane potential, and selective permeability were also performed. Our organic–inorganic hybrid PVDF-SiO2 CEMs demonstrated higher oxidative stability and lower resistance than commercial Ionsep-HC-C membranes with a hydrocarbon structure. Thus, the synthesis method described in this work is very promising for the production of very efficient CEMs. In addition, the physical and electrochemical properties of the PVDF-SiO2 CEMs are comparable to the Ionsep-HC-C membranes. The electrolysis of the concentrated CoCl2 solution performed using PVDF-SiO2-6 and Ionsep-HC-C CEMs showed that at the same current density, Co2+ production, and current efficiency of the PVDF-SiO2-6 CEM membrane were slightly higher than those obtained using the Ionsep-HC-C membrane. Therefore, our novel membrane might be suitable for the recovery of cobalt from concentrated CoCl2 solutions.

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Photoreactive Superhydrophobic Organic–Inorganic Hybrid Materials Composed of Poly(vinylidene fluoride) and Titanium Dioxide-Supported Perfluorinated Phthalocyanines

ACS Applied Polymer Materials ◽

10.1021/acsapm.9b00273 ◽

2019 ◽

Vol 1 (6) ◽

pp. 1514-1523 ◽

Cited By ~ 5

Author(s):

Abdul Azeez ◽

Lauren Polio ◽

James E. Hanson ◽

Sergiu M. Gorun

Keyword(s):

Titanium Dioxide ◽

Hybrid Materials ◽

Vinylidene Fluoride ◽

Inorganic Hybrid ◽

Poly Vinylidene Fluoride

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Effect of different contents of organic-inorganic hybrid particles poly(methyl methacrylate) ZrO 2 on the properties of poly(vinylidene fluoride-hexafluoroprolene)-based composite gel polymer electrolytes

Electrochimica Acta ◽

10.1016/j.electacta.2018.04.040 ◽

2018 ◽

Vol 272 ◽

pp. 127-134 ◽

Cited By ~ 24

Author(s):

Zhiyan Wang ◽

Chang Miao ◽

Wei Xiao ◽

Yan Zhang ◽

Ping Mei ◽

...

Keyword(s):

Methyl Methacrylate ◽

Polymer Electrolytes ◽

Vinylidene Fluoride ◽

Gel Polymer Electrolytes ◽

Hybrid Particles ◽

Inorganic Hybrid ◽

Poly Methyl Methacrylate ◽

Composite Gel ◽

Poly Vinylidene Fluoride

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Fabrication and Characterization of Polyvinylidene Fluoride Microfilms for Microfluidic Applications

International Journal of Nanoscience ◽

10.1142/s0219581x16600139 ◽

2016 ◽

Vol 15 (05n06) ◽

pp. 1660013

Author(s):

Yammani Venkat Subba Rao ◽

Aravinda Narayanan Raghavan ◽

Meenakshi Viswanathan

Keyword(s):

Spin Coating ◽

Polyvinylidene Fluoride ◽

Vinylidene Fluoride ◽

Microstructural Properties ◽

Average Roughness ◽

Microfluidic Mixer ◽

Poly Vinylidene Fluoride ◽

Fabrication And Characterization ◽

Microfluidic Mixers

The ability to create patterns of piezo responsive material on smooth substrate is an important method to develop efficient microfluidic mixers. This paper reports the fabrication of Poly vinylidene fluoride microfilms using spin-coating on smooth glass surface. The suitable crystalline phases, surface morphology and microstructural properties of the PVDF films have been investigated. We found that films of average thickness 10[Formula: see text][Formula: see text]m, had average roughness of 0.13[Formula: see text][Formula: see text]m. These PVDF films are useful in microfluidic mixer applications.

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Preparation of poly(vinylidene fluoride) nanocomposite membranes based on graft polymerization and sol–gel process for polymer electrolyte membrane fuel cells

Journal of Solid State Electrochemistry ◽

10.1007/s10008-011-1519-0 ◽

2011 ◽

Vol 16 (4) ◽

pp. 1405-1414 ◽

Cited By ~ 7

Author(s):

Won Seok Chi ◽

Rajkumar Patel ◽

Hyungkwon Hwang ◽

Yong Gun Shul ◽

Jong Hak Kim

Keyword(s):

Fuel Cells ◽

Polymer Electrolyte ◽

Graft Polymerization ◽

Vinylidene Fluoride ◽

Polymer Electrolyte Membrane ◽

Sol Gel ◽

Nanocomposite Membranes ◽

Electrolyte Membrane ◽

Sol Gel Process ◽

Poly Vinylidene Fluoride

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Cycling performance improvement of polypropylene supported poly(vinylidene fluoride-co-hexafluoropropylene)/maleic anhydride-grated-polyvinylidene fluoride based gel electrolyte by incorporating nano-Al2O3 for full batteries

Journal of Membrane Science ◽

10.1016/j.memsci.2016.02.001 ◽

2016 ◽

Vol 507 ◽

pp. 126-134 ◽

Cited By ~ 27

Author(s):

Youhao Liao ◽

Tingting Chen ◽

Xueyi Luo ◽

Zhao Fu ◽

Xiaoping Li ◽

...

Keyword(s):

Maleic Anhydride ◽

Performance Improvement ◽

Polyvinylidene Fluoride ◽

Vinylidene Fluoride ◽

Cycling Performance ◽

Gel Electrolyte ◽

Poly Vinylidene Fluoride

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Influence of dopant on the specific features of formation and properties of nanocomposites of poly(3-methylthiophene) with polyvinylidene fluoride

NEW FUNCTIONAL SUBSTANCES AND MATERIALS FOR CHEMICAL ENGINEERING ◽

10.15407/akademperiodyka.444.159 ◽

2021 ◽

pp. 159-174

Author(s):

Alexander A. Pud ◽

◽

Nikolay A. Ogurtsov ◽

Olga S. Kruglyak ◽

◽

...

Keyword(s):

Thermal Stability ◽

Polyvinylidene Fluoride ◽

Vinylidene Fluoride ◽

Thermal Studies ◽

Shell Morphology ◽

Inhomogeneous Layer ◽

Transmission Electron ◽

Oxidant Concentration ◽

Poly Vinylidene Fluoride ◽

Thermal Stability Of

The work is devoted to the development and study of conducting nanocomposites of poly(3-methylthiophene) (P3MT) and poly(vinylidene fluoride) (PVDF), suitable for changing properties when interaction with of the environment components, and to find factors of influence on properties of such materials. The kinetic aspects of P3MT formation in the process of 3-methylthiophene (3MT) polymerization in PVDF dispersions in the presence of dopants of different nature, in particular, chloride (Cl-), as well as surface-active dodecylbenzenesulfonate (DBS-) and perfluorooctanoate (PFO-) anions are studied. It is found that DBS- and PFO- anions inhibit 3MT oxidation and decrease P3MT yield in comparison with those of chloride anions. It is shown that P3MT is formed through two consecutive kinetically different reactions of pseudo-first order in terms of the oxidant concentration. Transmission electron microscopy revealed that as a result of such polymerization nanoparticles of doped P3MT formed a surface inhomogeneous layer on PVDF particles, thus forming nanocomposite particles with core-shell morphology. Thermal studies showed higher thermal stability of the doped P3MT phase in the nanocomposite compared to the pure polymer. It is found that thermal stability of the P3MT phase in the PVDF/P3MT-DBS nanocomposites is higher than in the PVDF/P3MT-Cl. The influence of the dopant nature and content of doped P3MT on conductivity and sensitivity of the nanocomposites to vapors of harmful volatile organic compounds (acetone and isopropanol) is characterized. The strongest responses to acetone are shown by the nanocomposite with PFO- dopant. In the DBS- dopant case medium intensity responses are found and the lowest ones are observed for Cl- dopant. It is shown that the sensitivity of nanocomposites extremely depends on the conducting polymer content.

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Solid–Liquid Europium Ion Extraction via Phosphonic Acid-Functionalized Polyvinylidene Fluoride Siloxanes

Polymers ◽

10.3390/polym12091955 ◽

2020 ◽

Vol 12 (9) ◽

pp. 1955 ◽

Cited By ~ 1

Author(s):

Mohammad Wehbi ◽

Ahmad Mehdi ◽

Ali Alaaeddine ◽

Nada Jaber ◽

Bruno Ameduri

Keyword(s):

Phosphonic Acid ◽

Polyvinylidene Fluoride ◽

31P Nmr ◽

Vinylidene Fluoride ◽

Sol Gel ◽

Europium Ion ◽

Ion Extraction ◽

Removal Capacity ◽

3D Network ◽

Potential Applications

Novel triethoxysilane and dimethyl phosphonate functional vinylidene fluoride (VDF)-containing terpolymers, for potential applications in Eu ion extraction from water, were produced by conventional radical terpolymerization of VDF with vinyltriethoxylsilane (VTEOS) and vinyldimethylphosphonate (VDMP). Although initial attempts for the copolymerization of VTEOS and VDMP failed, the successful terpolymerization was initiated by peroxide to lead to multiple poly(VDF-ter-VDMP-ter-VTEOS) terpolymers, that had different molar percentages of VDF (70–90 mol.%), VTEOS (5–20 mol.%) and VDMP (10 mol.%) in 50–80% yields. The obtained terpolymers were characterized by 1H, 19F, 29Si and 31P NMR spectroscopies. The crosslinking of such resulting poly(VDF-ter-VDMP-ter-VTEOS) terpolymers was achieved by hydrolysis and condensation (sol–gel process) of the triethoxysilane groups in acidic media, to obtain a 3D network, which was analyzed by solid state 29Si and 31P NMR spectroscopies, TGA and DSC. The thermal stability of the terpolymers was moderately high (up to 300 °C under air), whereas they display a slight increase in their crystallinity-rate from 9.7% to 12.1% after crosslinking. Finally, the dimethyl phosphonate functions were hydrolyzed into phosphonic acid successfully, and the europium ion extraction capacity of terpolymer was studied. The results demonstrated a very high removal capacity of Eu(III) ions from water, up to a total removal at low concentrations.

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