Stress-induced structural changes in electrospun polyvinylidene difluoride nanofibers collected using a modified rotating disk

Yee, Wu Aik; Nguyen, Anh H. T.; Lee, Pooi See; Kotaki, Masaya; Liu, Ye; Tan, Boon Teoh; Mhaisalkar, Subodh; Lu, Xuehong

doi:10.1016/j.polymer.2008.07.032

Cited by 108 publications

(91 citation statements)

References 25 publications

(32 reference statements)

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“…Zhang et al [34] produced uniaxially aligned electrospun nanofibers of PAN and Triton X-100 grafted MWNTs using a collector consisting of two pieces of electrodes as well as a slowly rotating drum with multi-electrodes. Yee et al [35] modified the design of a disk by using two separate parallel aluminium electrodes attached to a rotating disk to collect the well-aligned MWCNT/PVDF nanofibers, where both the electric field and mechanical force contributed to nanofiber alignment. Though there are various special dynamic collectors reported, such as, rotating drums, wire drums, discs, rings etc., most of them require an external power to rotate at high rpm and it is difficult to deposit the aligned fibers onto devices directly [7].…”

Section: G R Rakesh G S Ranjit K K Karthikeyan P Radhakrishmentioning

confidence: 99%

A facile route for controlled alignment of carbon nanotube-reinforced, electrospun nanofibers using slotted collector plates

Rakesh¹,

Ranjit²,

Karthikeyan³

et al. 2015

Express Polym. Lett.

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Abstract.A facile route for controlled alignment of electrospun multiwalled carbon nanotube (MWCNT)-reinforced Polyvinyl Alcohol (PVA) nanofibers using slotted collector geometries has been realized. The process is based on analytical predictions using electrostatic field analysis for envisaging the extent of alignment of the electrospun fibers on varied collector geometries. Both the experimental and theoretical studies clearly indicate that the introduction of an insulating region into a conductive collector significantly influences the electrostatic forces acting on a charged fiber. Among various collector geometries, rectangular slotted collectors with circular ends showed good fiber alignment over a large collecting area. The electrospun fibers produced by this process were characterized by Atomic Force Microscopy (AFM), High Resolution Transmission Electron Microscopy (HRTEM), Scanning Electron Microscopy (SEM) and Optical Microscopy. Effects of electrospinning time and slot widths on the fiber alignment have been analyzed. PVA-MWCNT nanofibers were found to be conducting in nature owing to the presence of reinforced MWCNTs in PVA matrix. The method can enable the direct integration of aligned nanofibers with controllable configurations, and significantly simplify the production of nanofibersbased devices.

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Section: G R Rakesh G S Ranjit K K Karthikeyan P Radhakrishmentioning

confidence: 99%

A facile route for controlled alignment of carbon nanotube-reinforced, electrospun nanofibers using slotted collector plates

Rakesh¹,

Ranjit²,

Karthikeyan³

et al. 2015

Express Polym. Lett.

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“…Low rates result predominantly in the  phase, whereas high rates favor the  phase. Electrospinning [10,11] also produces predominantly the  phase [12][13][14][15][16][17][18]. In this technique the polymer solution is added to a capillary (which can be a syringe with needle).…”

Section: Introductionmentioning

confidence: 99%

“…If the concentration of the solution is sufficiently high (viscous) to stabilize the jet, the polymer solution is severely stretched and the solvent evaporates to form ultrathin fibers which solidify and are deposited on the collector forming a non-woven mesh of fibers. Some authors [13][14][15][16][17] attribute the formation of β phase in electrospun PVDF meshes to this severe drawing ex-perienced by the polymer jet solution. This elongation process would be similar to the well known  transition caused by mechanical drawing at T  90℃ [2][3][4][5][6].…”

Section: Introductionmentioning

confidence: 99%

Effect of Solution Concentration on the Electrospray/Electrospinning Transition and on the Crystalline Phase of PVDF

Costa¹,

Bretas²,

Grégório³

2010

MSA

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“…Electrospinning is a relatively simple technique to convert droplets of a polymer solution, under the influence of a high-voltage electrical field, into nanofibres forming fibrous mats for various applications 13,14 . The orientation or arrangement of nanofi- bres in a nanofibre mat can be manipulated to be random (nonwoven), or aligned in some predetermined design, or a mixture of both 15 .…”

Section: Introductionmentioning

confidence: 99%

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Bodhipadma¹,

Noichinda²,

Chanunpanich³

et al. 2011

ScienceAsia

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The development of new materials to be used as a substrate for plant tissue culture can lead to substantial advances in biotechnology. Here, mats consisting of a mixture of nonwoven (randomly oriented) and aligned nanofibres were produced by electrospinning solutions of polylactic acid (PLA) and polyvinylidene fluoride (PVDF). They were referred to as PLA4 and PVDF4, respectively. Callus initiation from stem explants of bilimbi (Averrhoa bilimbi L.) and aromatic chilli (Capsicum frutescens L.) occurred on these two types of nanofibre mats floated in liquid Murashige and Skoog (1962) basal medium supplemented with 2 mg/l α-naphthalene acetic acid or 2,4-dichlorophenoxy acetic acid, respectively. After subculturing for 3 weeks, the fresh weight of callus initiated from stem explants of bilimbi was significantly greater by 20% when PVDF4 rather than PLA4 nanofibre mats were used as a support matrix. In contrast, both the fresh and dry weights of callus initiated from stem explants of aromatic chilli were significantly greater by 11% and 50%, respectively, when PLA4 and not PVDF4 nanofibre mats was used. These differences in response to the two types of nanofibre mats were also found in relation to growth of callus of bilimbi and aromatic chilli during subculture. This is the first time electrospun nanofibre mats have been used in plant tissue culture research.

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Stress-induced structural changes in electrospun polyvinylidene difluoride nanofibers collected using a modified rotating disk

Cited by 108 publications

References 25 publications

A facile route for controlled alignment of carbon nanotube-reinforced, electrospun nanofibers using slotted collector plates

A facile route for controlled alignment of carbon nanotube-reinforced, electrospun nanofibers using slotted collector plates

Effect of Solution Concentration on the Electrospray/Electrospinning Transition and on the Crystalline Phase of PVDF

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