scholarly journals High-Hydrophilic and Antifouling Poly (Vinylidene Fluoride) Composite Membranes via in Situ Mosaic- Assembled Nanocrystalline Cellulose and g-C3N4

2021 ◽  
Author(s):  
Hongbin Li ◽  
chao liu ◽  
Yongqiang Guo ◽  
Shuzhen Gao
Keyword(s):  
Tensile Strength ◽  
Composite Membrane ◽  
Vinylidene Fluoride ◽  
Water Flux ◽  
Composite Membranes ◽  
Nanocrystalline Cellulose ◽  
Membrane Properties ◽  
X Ray Diffraction ◽  
Poly Vinylidene Fluoride

Abstract Developing an antifouling and stable separation poly (vinylidene fluoride) (PVDF) membrane for water treatment is of great significance but challenging due to the limitations of its low surface properties and strong hydrophobicity. In this study, a novel multi-block composite ultrafiltration membrane was developed using the mosaic-assembled doping of pineapple leaf nanocrystalline cellulose and g-C3N4. The effects of adding different components on the PVDF composite membrane properties have been analyzed. The surface chemical composition, surface morphology, crystallinity and thermal stability of the composite membranes were characterized by Fourier transform infrared spectroscopy (FTIR), scanning electron microscope (SEM), X-ray diffraction (XRD) and thermogravimetric analysis (TGA). Both of the tensile strength and elongation length of the PVDF composite membranes were enhanced due to the addition of pineapple leaf nanocellulose and g-C3N4, and the tensile strength and elongation length of PVDF/PEG/g-C3N4/Pineapple leaf nanocellulose composite membrane can reach 10.61 MPa and 8.85 mm. The porosity of the PVDF composite membranes was 46.6%, respectively. The water flux and flux recovery ratio of PVDF/PEG/g-C3N4/Pineapple leaf nanocellulose also can reach 256.75 L/(m2 ⋅h) and up to 82.1%. All the above experimental data showed that the addition of pineapple leaf nanocellulose and g-C3N4 can greatly improve the performance of the PVDF composite membrane. The prepared modified membrane has potential application value in the field of wastewater separation and treatment.

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

Novel electrospun poly(vinylidene fluoride-co-hexafluoropropylene)–in situ SiO2 composite membrane-based polymer electrolyte for lithium batteries

2008 ◽  
Vol 184 (2) ◽  
pp. 437-443 ◽  
Author(s):  
Prasanth Raghavan ◽  
Jae-Won Choi ◽  
Jou-Hyeon Ahn ◽  
Gouri Cheruvally ◽  
Ghanshyam S. Chauhan ◽  
...  
Keyword(s):  
Polymer Electrolyte ◽  
Composite Membrane ◽  
Lithium Batteries ◽  
Vinylidene Fluoride ◽  
Poly Vinylidene Fluoride

Fabrication and biocompatibility of reduced graphene oxide/poly(vinylidene fluoride) composite membranes

RSC Advances ◽  
2015 ◽  
Vol 5 (121) ◽  
pp. 99841-99847 ◽  
Author(s):  
Supeng Pei ◽  
Fei Ai ◽  
Song Qu
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Reduction Method ◽  
Vinylidene Fluoride ◽  
Composite Membranes ◽  
Thermal Reduction ◽  
Reduced Graphene ◽  
Poly Vinylidene Fluoride ◽  
Good Biocompatibility

RGO/PVDF composite membranes with different RGO loadings were prepared by a convenient in situ thermal reduction method and the structural study reveals the good dispersion of RGO in the PVDF, moreover, RGO/PVDF membranes show good biocompatibility.

scholarly journals Titanium dioxide nanoparticle incorporated PVDF-HFP based composite membrane for direct methanol fuel cells application

2021 ◽  
Vol 56 (2) ◽  
pp. 125-132
Author(s):  
MA Karim
Keyword(s):  
Composite Membrane ◽  
Direct Methanol Fuel Cells ◽  
Vinylidene Fluoride ◽  
Composite Membranes ◽  
Methanol Permeability ◽  
Titanium Dioxide Nanoparticle ◽  
Sem Image ◽  
Higher Power ◽  
Poly Vinylidene Fluoride ◽  
Direct Methanol

Two composite polymeric membranes were synthesized using poly vinylidene fluoride-hexafluoroprropylene (PVDF-HFP) host in polyvinyl alcohol and with or without TiO2 nanoparticlesas a porous substrate. The structure of the membranes was PDVF-HFP/PVA and PVDF-HFP/PVA/TiO2.The composition of the synthesized membranes was analyzed by FTIR spectrum.The porosity of the polymer membranes were measured by immersing the membranes into n-butanol. The conductivity of the composite membranes was determined by impedance spectroscopy and the methanol permeability of the membranes was obtained from diffusion experiments. The surface morphology images were investigated by scanning electron microscope(SEM). The SEM image of the composite membrane incorporated with TiO2 has many pores which increased the conductivity of the membrane as compared to non TiO2 incorporated one. The composite membrane with TiO2 showed a good balance between proton conductivity and methanol permeability. The cell with PVDF-HFP/PVA/TiO2 composite membrane showed higher power density. Bangladesh J. Sci. Ind. Res.56(2), 125-132, 2021

High Performance Electrospun PVdF-HFP/MMT Nanofibrous Composite Membrane Electrolyte for Li-Ion Capacitors

2017 ◽  
Vol 14 ◽  
pp. 1-15
Author(s):  
Arun Kumar Solarajan ◽  
Vignesh Murugadoss ◽  
Subramania Angaiah
Keyword(s):  
Composite Membrane ◽  
High Performance ◽  
Electrode Materials ◽  
Vinylidene Fluoride ◽  
Composite Membranes ◽  
Strength Analysis ◽  
Electrospinning Technique ◽  
Electrolyte Uptake ◽  
Poly Vinylidene Fluoride ◽  
Li Ion

The electrospun poly(vinylidene fluoride-co-hexafluoropropylene)/montmorillonite nanofibrous composite membranes (esCPMs) were prepared by electrospinning technique using a mixture of different amounts of montmorillonite (0, 3, 5, 7 and 10 wt%) into 16 wt% of PVDF-HFP polymer solution in 7:3 wt% of acetone and dimethylacetamide as the solvent. The effect of montmorillonite (MMT) on electrospun PVdF-HFP membrane has been studied by XRD, DSC, TGA and tensile strength analysis. It is found that electrospun PVDF-HFP/MMT nanofibrous composite membrane obtained using 5wt% MMT has a higher porosity, electrolyte uptake, ionic conductivity, electrochemical stability window and showed higher specific capacitance and good compatibility with electrode materials.

Study on Mechanical Properties of AA6351 Alloy Reinforced with Titanium Di-Boride (TiB2) Composite by In Situ Casting Method

2015 ◽  
Vol 787 ◽  
pp. 583-587 ◽  
Author(s):  
V. Mohanavel ◽  
K. Rajan ◽  
K.R. Senthil Kumar
Keyword(s):  
Tensile Strength ◽  
Aluminum Matrix ◽  
Aluminum Matrix Composites ◽  
Scanning Electron Micrographs ◽  
Matrix Composites ◽  
X Ray Diffraction ◽  
In Situ Reaction ◽  
Halide Salts ◽  
Scanning Electron

In the present study, an aluminum alloy AA6351 was reinforced with different percentages (1, 3 and 5 wt %) of TiB2 particles and they were successfully fabricated by in situ reaction of halide salts, potassium hexafluoro-titanate and potassium tetrafluoro-borate, with aluminium melt. Tensile strength, yield strength and hardness of the composite were investigated. In situ reaction between the inorganic salts K2TiF6 and KBF4 to molten aluminum leads to the formation of TiB2 particles. The prepared aluminum matrix composites were characterized using X-ray diffraction and scanning electron microscope. Scanning electron micrographs revealed a uniform dispersal of TiB2 particles in the aluminum matrix. The results obtained indicate that the hardness and tensile strength were increased with an increase in weight percentages of TiB2 contents.

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