Facile and low-cost approach towards a PVDF ultrafiltration membrane with enhanced hydrophilicity and antifouling performance via graphene oxide/water-bath coagulation

Wu, Tengfei; Zhou, Baoming; Zhu, Ting; Shi, Jie; Xu, Zhiwei; Hu, Chuansheng; Wang, Jiajun

doi:10.1039/c4ra13476a

Cited by 164 publications

(111 citation statements)

References 62 publications

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“…In this work the development of novel CoFe 2 O 4 (CFO)/polyvinylidene fluoride (PVDF) multiferroic spheres is reported, with large potential applications in the biomedical, sensing, actuation, catalysis and energy fields [13][14][15] . PVDF, a piezoelectric polymer with five possible distinct crystalline phases named as α, β-phase, γ, δ and ɛ, was selected as the piezoelectric component due to its biocompatibility, high piezoelectric response, large chemical and radiation resistance, easy shaping and low cost 11,[22][23][24] . CFO nanoparticles were selected as the magnetostrictive phase due to their chemical stability, mechanical hardness, wear resistance, ease of synthesis, large magnetostriction, high Curie temperature, low cost and simple processability 25,26 .…”

Section: Introductionmentioning

confidence: 99%

Development of magnetoelectric CoFe₂O₄ /poly(vinylidene fluoride) microspheres

et al. 2015

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Magnetoelectric microspheres based on piezoelectric poly(vinylidene fluoride) (PVDF) and magnetostrictive CoFe 2 O 4 (CFO), a novel morphology for polymer-based ME materials, have been developed by an electrospray process. The CFO nanoparticle content in the (3-7 mm diameter) microspheres reaches values up to 27 wt%, despite their concentration in the starting solution reaching values up to 70 wt%. Additionally, the inclusion of magnetostrictive nanoparticles into the polymer spheres has no relevant effect on the piezoelectric b-phase content (z60%), crystallinity (40%) and the onset degradation temperature (460-465 C) of the polymer matrix. The multiferroic microspheres show a maximum piezoelectric response |d33| z 30 pC N1, leading to a magnetoelectric response of D|d33| z 5 pC N1 obtained when a 220 mT DC magnetic field was applied. It is also shown that the interface between CFO nanoparticles and PVDF (from 0 to 55%) has a strong influence on the ME response of the microspheres. The simplicity and the scalability of the processing method suggest a large application potential of this novel magnetoelectric geometry in areas such as tissue engineering, sensors and actuators. Magnetoelectric microspheres based on piezoelectric poly(vinylidene fluoride) (PVDF) and magnetrostrictive CoFe 2 O 4 (CFO), a novel morphology for polymer-based ME material, have been developed by an electrospray process. The CFO nanoparticles content in the (3 -7 µm diameter) microspheres reaches values up to 27 wt.%, despite their concentration in the starting solution reaching values up to 70 wt.%. Additionally, the inclusion of magnetostrictive nanoparticles into the polymer spheres has no relevant effect on the piezoelectric β-phase content (≈60%), crystallinity (40%) and the onset degradatio n temperature (460º-465ºC) of the polymer matrix. The multiferroic microspeheres show a maximum piezoelectric reponse |d33|≈30 pC.N -1 , leading to a magnetoelectric response of ∆|d33|≈5 pC.N -1 obtained when a 220 mT DC magnetic field was applied. It is also shown that the interface between CFO nanoparticles and PVDF (from 0 to 55%) has a strong influence on the ME response of the microspheres. The simplicity and the scalability of the processing method suggest a large application potential of this novel mag netoelectric geometry in areas such as tissue engineering, sensors and actuators.

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Section: Introductionmentioning

confidence: 99%

Development of magnetoelectric CoFe₂O₄ /poly(vinylidene fluoride) microspheres

et al. 2015

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“…It was generally agreed that a membrane with smoother surface possessed greater antifouling capability (Rana and Matsuura 2010). However, if the increase in roughness was caused by the enrichment of hydrophilic nanomaterials and fluorine-containing segments on the membrane surface, it improved the membrane surface hydrophilicity and reduced surface free energy although the roughness was high (Wu et al 2015). Consequently, the hybrid membranes were undoubtedly beneficial to promote water permeability and antifouling properties.…”

Section: Permeability and Antifouling Properties Of Membranesmentioning

confidence: 99%

Optimized permeation and antifouling of PVDF hybrid ultrafiltration membranes: synergistic effect of dispersion and migration for fluorinated graphene oxide

Shi

Chen

et al. 2017

J Nanopart Res

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Nanoparticles may have suffered from low modification efficiency in hybrid membranes due to embedding and aggregating in polymer matrix. In order to analyze the modification mechanisms of nanoparticle migration and dispersion on the properties of hybrid membranes, we designed different F/O ratios (R F/O ) of fluorinated graphene oxide (FGO, diameter = 1.5~17.5 μm) by carbon tetrafluoride (CF 4 ) plasma treatment GO for 3, 5, 10, 15, and 20 min and successfully prepared novel PVDF hybrid membranes containing FGO via the phase inversion method. After a prolonged plasma treatment, the R F/O of FGO was enhanced sharply, indicating an increasing compatibility of FGO with the matrix, especially FGO-20 (GO treated for 20 min). FGO contents in the top layer, sublayer, and the whole of membranes were probed by Xray photoelectron spectroscopy, energy-dispersive spectrometer, and indirect computation, respectively. In the top layer of membranes, FGO contents declined from 13.14 wt% (PVDF/GO) to 4.00 wt% (PVDF/FGO-10) and 1.96 wt% (PVDF/FGO-20) due to the reduced migration ability of FGO. It is worth mentioning that PVDF/FGO-10 membranes exhibited an excellent water flux and flux recovery rate (up to 406.90 L m −2 h −1 and 88.9%), which were improved by 67.3% and 14.6% and 52.5% and 24.0% compared with those of PVDF/GO and PVDF/FGO-20 membranes, respectively, although the dispersion and migration ability of FGO-10 was maintained at a moderate level. It indicated that the migration and dispersion of FGO in membranes could result in dynamic equilibrium, which played a key role in making the best use of nanomaterials to optimize membrane performance.

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“…In GO molecular structure, the contiguous aromatic lattice is interrupted by epoxides, hydroxyls, ketone carbonyls, and carboxylic groups [12]. Within this, the hydroxyls and carboxylic groups endowed GO excellent hydrophilic property and it has been widely used in the hydrophilic modification of filtering membranes [13,14] and fabrics [15]. In this paper, different amounts of GO were doped into the graphene modified layers to elevate the hydrophilicity of the anode surfaces so as to further enhance the performance of the G anodes.…”

Section: Introductionmentioning

confidence: 99%

Effect of Graphene-Graphene Oxide Modified Anode on the Performance of Microbial Fuel Cell

Yang

Ren

et al. 2016

Nanomaterials

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The inferior hydrophilicity of graphene is an adverse factor to the performance of the graphene modified anodes (G anodes) in microbial fuel cells (MFCs). In this paper, different amounts of hydrophilic graphene oxide (GO) were doped into the modification layers to elevate the hydrophilicity of the G anodes so as to further improve their performance. Increasing the GO doped ratio from 0.15 mg·mg−1 to 0.2 mg·mg−1 and 0.25 mg·mg−1, the static water contact angle (θc) of the G-GO anodes decreased from 74.2 ± 0.52° to 64.6 ± 2.75° and 41.7 ± 3.69°, respectively. The G-GO0.2 anode with GO doped ratio of 0.2 mg·mg−1 exhibited the optimal performance and the maximum power density (Pmax) of the corresponding MFC was 1100.18 mW·m−2, 1.51 times higher than that of the MFC with the G anode.

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Facile and low-cost approach towards a PVDF ultrafiltration membrane with enhanced hydrophilicity and antifouling performance via graphene oxide/water-bath coagulation

Abstract: Introduction of GO into a coagulation bath indicates a candidate for a GO-mixed method in tailoring the performance of PVDF ultrafiltration membranes.

Cited by 164 publications

References 62 publications

Development of magnetoelectric CoFe₂O₄ /poly(vinylidene fluoride) microspheres

Development of magnetoelectric CoFe₂O₄ /poly(vinylidene fluoride) microspheres

Optimized permeation and antifouling of PVDF hybrid ultrafiltration membranes: synergistic effect of dispersion and migration for fluorinated graphene oxide

Effect of Graphene-Graphene Oxide Modified Anode on the Performance of Microbial Fuel Cell

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Facile and low-cost approach towards a PVDF ultrafiltration membrane with enhanced hydrophilicity and antifouling performance via graphene oxide/water-bath coagulation

Abstract: Introduction of GO into a coagulation bath indicates a candidate for a GO-mixed method in tailoring the performance of PVDF ultrafiltration membranes.

Cited by 164 publications

References 62 publications

Development of magnetoelectric CoFe2O4 /poly(vinylidene fluoride) microspheres

Development of magnetoelectric CoFe2O4 /poly(vinylidene fluoride) microspheres

Optimized permeation and antifouling of PVDF hybrid ultrafiltration membranes: synergistic effect of dispersion and migration for fluorinated graphene oxide

Effect of Graphene-Graphene Oxide Modified Anode on the Performance of Microbial Fuel Cell

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Development of magnetoelectric CoFe₂O₄ /poly(vinylidene fluoride) microspheres

Development of magnetoelectric CoFe₂O₄ /poly(vinylidene fluoride) microspheres