scholarly journals Poly(vinylidene fluoride) grafted polystyrene (PVDF-g-PS) membrane based on in situ polymerization for solvent resistant nanofiltration

RSC Advances ◽  
2017 ◽  
Vol 7 (53) ◽  
pp. 33201-33207 ◽  
Author(s):  
Fang Yuan ◽  
Yi Yang ◽  
Rui Wang ◽  
Dongju Chen
Keyword(s):  
Vinylidene Fluoride ◽  
In Situ Polymerization ◽  
Poly Vinylidene Fluoride

A poly(vinylidene fluoride) grafted polystyrene (PVDF-g-PS) membrane was prepared by in situ polymerization methods and applied in solvent resistant nanofiltration (SRNF).

scholarly journals Achieving high performance poly(vinylidene fluoride) dielectric composites via in situ polymerization of polypyrrole nanoparticles on hydroxylated BaTiO3 particles

2019 ◽  
Vol 10 (35) ◽  
pp. 8224-8235 ◽  
Author(s):  
Xu Xie ◽  
Zhen-zhen He ◽  
Xiao-dong Qi ◽  
Jing-hui Yang ◽  
Yan-zhou Lei ◽  
...  
Keyword(s):  
Dielectric Properties ◽  
High Performance ◽  
Vinylidene Fluoride ◽  
In Situ Polymerization ◽  
Composite Particles ◽  
Poly Vinylidene Fluoride ◽  
Polypyrrole Nanoparticles

PPy@BTOH composite particles with a ‘mulberry-like’ structure are fabricated to prepare dielectric composites with excellent comprehensive dielectric properties.

scholarly journals PREPARATION METHOD OF NZVI-PVDF HYBRID FILMS WITH CATION-EXCHANGE FUNCTION FOR REDUCTIVE TRANSFORMATION OF CR(VI)

2018 ◽  
Vol 26 (1) ◽  
pp. 19-27 ◽  
Author(s):  
Xiangyu WANG ◽  
Shan CONG
Keyword(s):  
Acrylic Acid ◽  
Vinylidene Fluoride ◽  
In Situ Polymerization ◽  
Reduction Process ◽  
High Reactivity ◽  
Pvdf Film ◽  
Sem Images ◽  
Poly Vinylidene Fluoride ◽  
Exchange Function

Poly (vinylidene fluoride) (PVDF) microporous film was successfully synthesized and functionalized by poly acrylic acid (PAA) for immobilization of nanoscale zero-valent iron (NZVI). PAA was innovatively introduced onto PVDF film via in situ polymerization of acrylic acid (AA) and followed by ion exchange procedure. The as-prepared PAA/PVDF-NZVI hybrids (PPN) were characterized in terms of morphology (SEM) and surface functional groups (FTIR). FTIR spectra confirms the functionalization of PVDF film by coating of PAA within its micropores. And SEM images suggested that NZVI were well immobilized onto the surface of the support. Over the reaction course, the resultant PPN hybrids demonstrated high reactivity, excellent stability and reusability for Cr(VI) removal. Results showed that lower pH and initial concentration facilitated the removal of Cr(VI) by PPN. Compared with bare NZVI, PAA/PVDF film-immobilized NZVI resulted in a lower activation energy for Cr(VI) removal, indicating that Cr(VI) reduction process with PPN is a surfacecontrolled chemical reaction. Moreover, a two-parameter pseudo-first-order model was provided and well-described the reaction kinetics of Cr(VI) over PPN under various conditions.

PVDF promotes TiO2 dispersion to obtain composite films with high dielectric constant and low loss

2021 ◽  
pp. 095400832110440
Author(s):  
Mingyun Peng ◽  
Ke Li ◽  
Bingliang Huang ◽  
Jie Cheng
Keyword(s):  
Dielectric Constant ◽  
Room Temperature ◽  
Vinylidene Fluoride ◽  
In Situ Polymerization ◽  
Composite Films ◽  
Low Loss ◽  
Three Phase ◽  
Poly Vinylidene Fluoride ◽  
High Dielectric

A series of three-phase composite films with different filler contents were prepared by in-situ polymerization. The composite films comprise polyimide (PI), poly (vinylidene fluoride) (PVDF), and titanium dioxide (TiO2). Compared with PI/TiO2 composite films, the PI/TiO2-PVDF composite films not only get a significant increase in dielectric constant, but also own better mechanical properties. Our results show that with the loading of 50wt% PVDF particles, the dielectric constant of PI/TiO2-PVDF composite films increased from 6.5 to 18.14 at 1 MHz and room temperature, while the tensile strength of PI/TiO2-PVDF composite films increased from 45 to 72 MPa. In addition, the films maintain a low loss tangent of about 0.02. PI/PVDF composite films were also prepared. It was found that dielectric constant of PI/PVDF composite was significantly lower than that of PI/TiO2-PVDF composite films when the loading of PVDF is 50wt%.

Physico‐Chemical Characterizations of Poly(vinylidene fluoride)/Cu 3 (BTC) 2 Composite Membranes Prepared by In Situ Crystal Growth

2019 ◽  
Vol 60 (3) ◽  
pp. 464-473 ◽  
Author(s):  
Nadhem Missaoui ◽  
Gérald Chaplais ◽  
Ludovic Josien ◽  
Laure Michelin ◽  
Gautier Schrodj ◽  
...  
Keyword(s):  
Crystal Growth ◽  
Vinylidene Fluoride ◽  
Composite Membranes ◽  
Physico Chemical ◽  
Poly Vinylidene Fluoride

In-situ synchrotron SAXS and WAXS investigations on deformation and α–β transformation of uniaxial stretched poly(vinylidene fluoride)

CrystEngComm ◽  
2013 ◽  
Vol 15 (8) ◽  
pp. 1597 ◽  
Author(s):  
Huilong Guo ◽  
Yao Zhang ◽  
Feifei Xue ◽  
Ziwei Cai ◽  
Yingrui Shang ◽  
...  
Keyword(s):  
Vinylidene Fluoride ◽  
Poly Vinylidene Fluoride ◽  
Synchrotron Saxs

scholarly journals Development of In-Situ Poled Nanofiber Based Flexible Piezoelectric Nanogenerators for Self-Powered Motion Monitoring

2020 ◽  
Vol 10 (10) ◽  
pp. 3493
Author(s):  
Minjung Kim ◽  
Vignesh Krishnamoorthi Kaliannagounder ◽  
Afeesh Rajan Unnithan ◽  
Chan Hee Park ◽  
Cheol Sang Kim ◽  
...  
Keyword(s):  
Vinylidene Fluoride ◽  
Implantable Devices ◽  
The Past ◽  
Β Phase ◽  
Poly Vinylidene Fluoride ◽  
High Bias ◽  
Self Powered ◽  
Increasing Demand ◽  
Piezoelectric Nanogenerators

Energy harvesting technologies have found significant importance over the past decades due to the increasing demand of energy and self-powered design of electronic and implantable devices. Herein, we demonstrate the design and application of in situ poled highly flexible piezoelectric poly vinylidene fluoride (PVDF) graphene oxide (GO) hybrid nanofibers in aligned mode for multifaceted applications from locomotion sensors to self-powered motion monitoring. Here we exploited the simplest and most versatile method, called electrospinning, to fabricate the in situ poled nanofibers by transforming non-polar α-phase of PVDF to polar β- phase structures for enhanced piezoelectricity under high bias voltage. The flexible piezoelectric device fabricated using the aligned mode generates an improved output voltage of 2.1 V at a uniform force of 12 N. The effective piezoelectric transduction exhibited by the proposed system was tested for its multiple efficacies as a locomotion detector, bio-e-skin, smart chairs and so on.

In situ synthesis of Ni(OH)2nanobelt modified electroactive poly(vinylidene fluoride) thin films: remarkable improvement in dielectric properties

2015 ◽  
Vol 17 (19) ◽  
pp. 13082-13091 ◽  
Author(s):  
Pradip Thakur ◽  
Arpan Kool ◽  
Biswajoy Bagchi ◽  
Nur Amin Hoque ◽  
Sukhen Das ◽  
...  
Keyword(s):  
Thin Films ◽  
Dielectric Properties ◽  
Vinylidene Fluoride ◽  
In Situ Synthesis ◽  
Dielectric Constants ◽  
Remarkable Improvement ◽  
Poly Vinylidene Fluoride

Development of Ni(OH)2nanobelt modified electroactive PVDF thin films with colossal dielectric constantsviaa simplein situprocess.

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