Fabrication of PVDF/PVA microtubules by coaxial electrospinning

Na, Haining; Chen, Pei; Wong, Shing Chung Josh; Hague, Shane; Li, Qian

doi:10.1016/j.polymer.2012.04.021

Cited by 68 publications

(49 citation statements)

References 42 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…5a) indicating the deformation vibration band of CH 2 at 1401 cm À1 ,the stretching band of CeC in bphase at 1070 cm À1 , the framework vibration of CeC at 874 cm À1 , and the vibration absorption for crystalline phase at 763 cm À1 [41]. The intense peaks at 841 cm À1 and 1277 cm À1 indicate the characteristic bands of b-phase PVDF crystallites [42]. In Fig.…”

Section: Physico-chemical Characteristics Of the Fabricated Matsmentioning

confidence: 89%

Removal of oil from water using magnetic bicomponent composite nanofibers fabricated by electrospinning

Jiang

Tijing

Amarjargal

et al. 2015

Composites Part B: Engineering

134

View full text Add to dashboard Cite

a b s t r a c tIn the present study, a magnetic nanofibrous composite mat composed of polystyrene (PS)/polyvinylidene fluoride (PVDF) nanofibers with selective incorporation of iron oxide (Fe 3 O 4 ) nanoparticles (NPs) on/in PS was successfully prepared via a facile two-nozzle electrospinning process for oil-in-water separation. Field emission scanning electron microscopy and infrared spectroscopy showed the mats to be highly-porous in structure and confirmed the presence of the Fe 3 O 4 NPs on/in the nanofibers. Both PS and PVDF nanofibers exhibited oleophilic and hydrophobic properties. The results showed improved mechanical properties when PVDF was added to the composite mat compared to the pristine PS mat. In addition, the incorporation of magnetic Fe 3 O 4 NPs in the composite mat helps in the easy recovery of the mats after the oil-in-water sorption process. The composite mats showed good oil sorption capacity (35 e46 g/g) and improved mechanical property. The present electrospun magnetic PVDF/Fe 3 O 4 @PS nanofibers could be potentially useful for the efficient removal of oil in water and recovery of sorbent material.

show abstract

Section: Physico-chemical Characteristics Of the Fabricated Matsmentioning

confidence: 89%

Removal of oil from water using magnetic bicomponent composite nanofibers fabricated by electrospinning

Jiang

Tijing

Amarjargal

et al. 2015

Composites Part B: Engineering

134

View full text Add to dashboard Cite

show abstract

“…These membranes have a highly hydrophilic nature, which is considered as an advantage for some applications, but in most cases it becomes a hindrance due to the high swelling capacity of the membranes in water. To enhance the stability and performance of PVA-based membranes, a variety of chemical modifications have been employed, e.g., cross-linking [5][6][7], electrospinning [8][9][10], blending [11], sol-gel process [12,13], and grafting [14,15].…”

Section: Introductionmentioning

confidence: 99%

Comparative study of PVA/SiO2 and PVA/SiO2/glutaraldehyde (GA) nanocomposite membranes prepared by single-step solution casting method

et al. 2015

View full text Add to dashboard Cite

We prepared poly(vinyl alcohol) (PVA)/SiO 2 and PVA/SiO 2 /glutaraldehyde (GA) nanocomposite membranes in a single step using the solution casting method. The structure, morphology, and properties of these nanocomposite membranes were characterized by Raman spectroscopy, atomic force microscopy, small-and wideangle X-ray scattering, thermogravimetric analysis, differential scanning calorimetry, and dynamic mechanical analysis (DMA). The influence of silica and GA loading on the meso-scale characteristics of the composite membranes was investigated. The results showed that silica deposited in the form of small nanoparticles (*1 nm) in the PVA/ SiO 2 membranes, while bigger submicron particles ([25 nm) were formed in the PVA/SiO 2 /GA membranes. The water uptake of the PVA/SiO 2 membranes increased with temperature, but the PVA/SiO 2 /GA membranes were completely dissolved above 50°C. We can therefore conclude that the addition of GA deteriorated the properties of PVA/SiO 2 membranes. The thermal stability of the PVA/ SiO 2 membranes increased with the increasing silica loading with a maximum char yield of 46 % for PVA/SiO 2 / 4T. Even DMA profiles indicated a promising increase in E R (rubbery modulus) from 6 MPa (PVA membrane) to 1015 MPa (PVA/SiO 2 /4T) at 250°C, showing high mechanical strength of these membranes.

show abstract

“…This has been the subject of many scientific researches focusing on controlling morphology of poly(vinylidene fluoride) (PVDF) membranes and films [52][53][54]. Nowadays, PVDF is the polymer of choice for a variety of scientific and commercial researches because of its favorable properties including flexibility, thermal stability, high mechanical strength and chemical resistance as well as diversity of PVDF potential applications as membrane, piezoelectric and pyroelectric materials in the form of films or electrospun fibers [2,3,55], porous nanofibers [56,57], core-shell nanofibers [58,59] and protection of brittle paper relics from environmental damage [60].…”

Section: Introductionmentioning

confidence: 99%

Interplay of liquid-liquid and solid-liquid phase separation mechanisms in porosity and polymorphism evolution within poly(vinylidene fluoride) nanofibers

2015

View full text Add to dashboard Cite

Porosity and polymorphism evolution within poly(vinylidene fluoride) (PVDF) nanofibers is discussed in relation to interplay of liquid-liquid (L-L) and solid-liquid (S-L) phase separation mechanisms. To this end, poly(vinylidene fluoride) (PVDF) solutions composed of nonvolatile solvents, dimethylformamide (DMF) and N-methylpyrrolidone (NMP), are subjected to electrospinning under environmental conditions of constant temperature (T=20 o C) and different levels of relative humidity (RH) ranging from 20 to 80 %. It is demonstrated that bead appearance, fiber diameter, porosity formation and polymorphism evolution is strongly affected by L-L phase inversion. Increasing RH as well as size of L-L miscibility gap in the ternary phase diagram of nonsolvent (water)/solvent (DMF or NMP)/polymer (PVDF) reduces time required to induce L-L demixing as verified by calculated mass transfer pathways. Therefore, bead-free fibers of larger diameters are expected, meanwhile, growth of β-phase crystals is suppressed. This is why fibers electrospun from DMF-based solution contain less β-phase crystals at high values of RH. In contrast, for solutions composed of NMP, jet stretching due to whipping instability plays pivotal role to form fiber structure as a result of delayed L-L demixing with respect to S-L demixing at high RH, 80 %. Furthermore, retarded L-L demixing in NMP-based systems destabilizes fiber formation at low humid environment which can be enhanced by addition a volatile solvent such as acetone. Additionally, more evidence for increment of β-phase formation with increasing working distance (w.d.) at constant RH is provided.

show abstract

Fabrication of PVDF/PVA microtubules by coaxial electrospinning

Cited by 68 publications

References 42 publications

Removal of oil from water using magnetic bicomponent composite nanofibers fabricated by electrospinning

Removal of oil from water using magnetic bicomponent composite nanofibers fabricated by electrospinning

Comparative study of PVA/SiO2 and PVA/SiO2/glutaraldehyde (GA) nanocomposite membranes prepared by single-step solution casting method

Interplay of liquid-liquid and solid-liquid phase separation mechanisms in porosity and polymorphism evolution within poly(vinylidene fluoride) nanofibers

Contact Info

Product

Resources

About