Exploring chemical and structural features to tailor wetting properties of PVDF and PVDF/PMMA surfaces

Afonso, Elisabet; Martínez‐Gómez, Aránzazu; Tiemblo, Pilar; García, Nuria

doi:10.1016/j.polymer.2022.125441

Cited by 5 publications

(5 citation statements)

References 49 publications

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“…The PMMA is an amorphous material [31,40], therefore, the XRD pattern of 80PVDF/20PMMA blend film (figure 2(a) marked with x = 0) exhibited various diffraction peaks which belong to the PVDF polymorphs. According to the literature [38,39,45,46,50], the crystal phases of the PVDF can be assigned as 2θ values of 18.82°(γ-phase), 20.66°(β-phase), 27.60 (α-phase), 36.48°(α-phase), and 39.63°(β-phase) in the blend matrix, and these are labelled on the XRD trace in figure 2(a). Additionally, the larger overlapped parts of the 18.82°and 20.66°peaks suggest the possibility of α-phase diffraction peak in this part.…”

Section: Structural Studies Of Nanocomposite Filmsmentioning

confidence: 99%

“…In several studies, polymer blend matrices with either MMT or OMMT nanofiller were used for the preparation of PNC with improved properties [15,18,37]. The PVDF/PMMA blend is an ideal choice because of the compatible blend formation of these polymers which enhances the promising properties [44][45][46]. However, to date, only a few studies are performed on the OMMT incorporated PVDF/PMMA/OMMT nanocomposite materials and their several useful properties are needed to be explored in detail.…”

Section: Introductionmentioning

confidence: 99%

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Broadband dielectric behaviour and structural characterization of PVDF/PMMA/OMMT polymer nanocomposites for promising performance nanodielectrics in flexible technology advances

Kumar

Sengwa

2023

Phys. Scr.

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Characterization of broadband dielectric behaviour of polymer nanocomposites (PNCs) is vital for the exploration of efficient nanodielectrics as energy storage, flexible dielectric substrates, and insulators in a wide range of advanced electronic device technologies. Accordingly, herein, PNC films based on poly(vinylidene fluoride) (PVDF) and poly(methyl methacrylate) (PMMA) blend matrix (80/20 wt/wt%) dispersed with 0, 2.5, 5, and 10 wt% organo-modified montmorillonite (OMMT) nanoclay are developed by state-of-the-art homogenized solution casting method. These PVDF/PMMA/OMMT compositions based flexible PNC films are characterized in detail by employing a scanning electron microscope (SEM) equipped with energy dispersive X-ray (EDX) device, X-ray diffractometer (XRD), Fourier transform infrared (FTIR) spectrometer, differential scanning calorimeter (DSC), inductance-capacitance-resistance (LCR) meter, and impedance/material analyzer (IMA). The SEM microimages, XRD traces, and FTIR spectra evidenced appreciable homogeneity and surface morphology, intercalated and exfoliated OMMT structures, and the α, β, and γ-phase crystallites of the PVDF in these complex semicrystalline PNCs. The DSC thermograms confirmed a significant alteration in the melting temperature and degree of crystallinity of the PVDF crystallites with the increased amount of OMMT in the 80PVDF/20PMMA blend host matrix. The broadband dielectric dispersion spectra over the frequency range of 20 Hz - 1 GHz explained the contribution of interfacial polarization in the complex dielectric permittivity at lower experimental frequencies, whereas at higher frequencies permittivity is ruled by dipolar polarization in these composites at 27 oC. The dielectric loss angle tangent and electric modulus spectra revealed an intense structural dynamics relaxation process in the radio frequency region. The influence of OMMT concentration on the dielectric permittivity and electrical conductivity is explored. The detailed dielectric and electrical characterization of these innovative semicrystalline composites with important structural and thermal properties revealed their immense potential as high-performance nanodielectrics for highlighting current applications of broadband frequency range electrical and electronic device technologies.

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Section: Structural Studies Of Nanocomposite Filmsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Broadband dielectric behaviour and structural characterization of PVDF/PMMA/OMMT polymer nanocomposites for promising performance nanodielectrics in flexible technology advances

Kumar

Sengwa

2023

Phys. Scr.

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“…33 A method of modifying the properties of PVdF is by blending it with polymethyl methacrylate (PMMA), which can hinder its crystallization behavior, reduce the crystallization rate, and increase the ionic conductivity and electrolyte absorption. [34][35][36][37][38] Hot-pressing treatment is also demonstrated to be an effective process on boosting the mechanical strength of electrospun membranes. [38][39][40][41][42] The objective of this study is to synthesize a lithium-ion battery separator with improved mechanical durability, good thermal resistance, and excellent electrochemical efficiency by integrating multiple approaches.…”

Section: Introductionmentioning

confidence: 99%

“…In this way, the mechanical strength of the poly (phthalazinone ether sulfone ketone) membrane in a certain direction is greatly enhanced, reaching up to 22.8 MPa 33 . A method of modifying the properties of PVdF is by blending it with polymethyl methacrylate (PMMA), which can hinder its crystallization behavior, reduce the crystallization rate, and increase the ionic conductivity and electrolyte absorption 34–38 . Hot‐pressing treatment is also demonstrated to be an effective process on boosting the mechanical strength of electrospun membranes 38–42 …”

Section: Introductionmentioning

confidence: 99%

Mechanically enhanced battery separator prepared by hot‐pressing electrospun polyvinylidene fluoride@polymethyl methacrylate membranes with different fiber orientations in adjacent layers

Ye,

De Guzman,

et al. 2024

Polymer Engineering & Sci

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Compared with commercial polyolefin membranes, electrospun polymeric membranes have the advantages of higher porosity and better electrolyte wettability, but their poor mechanical performance limits their industrial use as battery separators. In this work, a layer‐to‐layer electrospinning is used for fabrication of PVdF@PMMA membranes, in which fibers in adjacent layers are arranged at a certain angle (0°, 30°, 60°, 90°). The as‐electrospun membranes are further hot‐pressed to boost their mechanical strength. Various techniques are employed to evaluate the membranes, such as scanning electron microscopy, differential scanning calorimetry, contact angle measurement, electrochemical impedance spectroscopy, and linear sweep voltammetry. The results show that polymethyl methacrylate partially melts during the hot‐pressing treatment, causing adjacent fibers in the membranes to bridge. The obtained membranes show different tensile strength values with the various angles between fibers. When the angle is 30°, the tensile strength can reach 22.09 MPa and higher porosity (74.68%), greater liquid electrolyte absorption (612.36%) than that of commercial polyolefin membrane are harvested. The lithium‐ion cell assembly with the membrane separator exhibits a discharge capacity reaching 142 mAh g−1 and an excellent capacity retention of 90.7%. This present study provides an innovative and promising approach for the fabrication of high‐performance battery separator by electrospinning.Highlights PVdF@PMMA membranes are prepared by a layer‐to‐layer electrospinning. In the membranes, fiber orientation in adjacent layers is kept at a certain angle. Hot‐pressing further boosts mechanical performance of the membranes. Membranes with different angle of fibers show various mechanical strengths.

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“…Thus, several reported approaches considered enhancing the membrane performance by controlling the polymer solution, phase inversion parameters and post-treatment [36,40]. Higher water contact angles for chemically modified surfaces were reported in [41][42][43]. However, chemical modifications (alone) of a surface normally introduce limited/unstable enhancement of the contact angles.…”

Section: Introductionmentioning

confidence: 99%

Tuning PVDF Membrane Porosity and Wettability Resistance via Varying Substrate Morphology for the Desalination of Highly Saline Water

Baroud

2023

Membranes

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Here, we report the fabrication of a series of highly efficient polyvinylidene fluoride (PVDF) membranes via substrate morphology variations. A wide range of sandpaper grit sizes (150–1200) were utilized as casting substrates. The effect of the penetration of abrasive particles present on the sandpapers on the casted polymer solution was tuned, and the impact of these particles on porosity, surface wettability, liquid entry pressure and morphology were investigated. The membrane distillation performance of the developed membrane on sandpapers was evaluated for the desalination of highly saline water (70,000 ppm). Interestingly, the utilization of cheap and widely available sandpapers as a substrate for casting can not only help in tuning the MD performance, but also in producing highly efficient membranes with stable salt rejection (up to 100%) and a 210% increase in the permeate flux over 24 h. The findings in this study will help in delineating the role of substrate nature in controlling the produced membrane characteristics and performance.

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Exploring chemical and structural features to tailor wetting properties of PVDF and PVDF/PMMA surfaces

Cited by 5 publications

References 49 publications

Broadband dielectric behaviour and structural characterization of PVDF/PMMA/OMMT polymer nanocomposites for promising performance nanodielectrics in flexible technology advances

Broadband dielectric behaviour and structural characterization of PVDF/PMMA/OMMT polymer nanocomposites for promising performance nanodielectrics in flexible technology advances

Mechanically enhanced battery separator prepared by hot‐pressing electrospun polyvinylidene fluoride@polymethyl methacrylate membranes with different fiber orientations in adjacent layers

Tuning PVDF Membrane Porosity and Wettability Resistance via Varying Substrate Morphology for the Desalination of Highly Saline Water

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