Poly(ethylene oxide) thin films produced by electrospray deposition: morphology control and additive effects of alcohols on nanostructure

Morota, Kenji; Matsumoto, Hidetoshi; Mizukoshi, Tomoya; Konosu, Yuichi; Minagawa, Mie; Tanioka, Akihiko; Yamagata, Yutaka; Inoue, Kôzô

doi:10.1016/j.jcis.2004.06.075

Cited by 81 publications

(67 citation statements)

References 28 publications

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“…Electrospray deposition (ESD) is an electric field induced spray processing and a versatile method for the preparation of nano-microscaled fiber. 24 Our previous study revealed that the addition of nonionic hydrofluorocarbon remarkably enhanced the formation of thephase structure of the PVDF nanofiber during the ESD process. 23 In the ESD process, ionic additives are also effective for controlling the fiber diameter.…”

mentioning

confidence: 93%

Formation of β-Phase Crystalline Structure of PVDF Nanofiber by Electrospray Deposition: Additive Effect of Ionic Fluorinated Surfactant

Nasir

Matsumoto

Minagawa

et al. 2007

Polym J

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ABSTRACT:Poly(vinylidene fluoride) (PVDF) nanofibers were prepared by electrospray deposition (ESD). In the present work, the additive effect of ionic fluorinated surfactants-anionic and cationic surfactants -on the diameter, morphology, and crystalline structure of PVDF nanofiber was investigated. The addition of ionic fluorinated surfactants is useful for the formation of bead-free homogeneous fiber. At a higher concentration of the ionic surfactants, thicker fiber was formed. In addition, the Fourier transform infrared spectroscopy and the wide angle X-ray diffraction measurements showed that the addition of both ionic fluorinated surfactants causes a complete change in conformation from the initial -phase of to the -phase of PVDF during ESD. A possible mechanism based on the interaction between the polymer and surfactant molecules during ESD is discussed.

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confidence: 93%

Formation of β-Phase Crystalline Structure of PVDF Nanofiber by Electrospray Deposition: Additive Effect of Ionic Fluorinated Surfactant

Nasir

Matsumoto

Minagawa

et al. 2007

Polym J

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“…To control color of the coatings based on their nanoscaled strucures, we grew PEO coatings from different polymer concentration, composition of solvent, and conductivity followed that reported in Ref [12]. Photo images of the PEO coatings made by ESD are shown in Fig.1.…”

Section: Coloring Of Coatings By Esdmentioning

confidence: 99%

“…However, there have been few studies on optical properties of the nano-microtextured coatings by ESD. Our previous report provided a systematic information for the precise control of size of poly(ethylene oxide) (PEO) deposits by ESD [12]. We assumed that control of size of deposits in the range of visible light wavelength (380-780nm) by ESD could be used to determine color of coatings due to thinfilm interference.…”

Section: Introductionmentioning

confidence: 99%

Control over Color of Nanotextured Coatings by Electrospray Deposition

et al. 2008

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“…This trend corresponds to the effect of solution viscosity shown in our previous study using a high-molecular-weight linear polymer. 15,20 The critical lower concentration for formation bead-free fiber of phenolic resin, 55 wt %, is much higher than that for a high-molecular-weight linear polymer (M w :500,000), 5 wt %. 15 This is because that the molecular weight of the phenolic resin is low Preparation of Carbon Fiber Fabrics by Electrospray Deposition (4,000-5,000), and the structure is extended threedimensionally.…”

Section: Preparation Of Phenolic Resin Fibersmentioning

confidence: 99%

“…[12][13][14] We can control the fiber diameter by changing the solution properties (e.g., viscosity) and operational conditions (e.g., the distance between the nozzle tip and the substrate surface, the flow rate, and applied voltage). 15 Several studies showed the preparation of carbon nanofibers through carbonization of electrospun polyacrylonitrile (PAN) nanofibers. [16][17][18] The electrospun PAN fibers, however, can not maintain their shapes during the heat treatment before carbonizing due to their low thermal stability.…”

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Preparation of Carbon Fiber Fabrics from Phenolic Resin by Electrospray Deposition

Suzuki

Matsumoto

Minagawa

et al. 2007

Polym J

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ABSTRACT:Flexible carbon fiber fabrics of 1.7 mm diameter fiber were prepared by electrospray deposition (ESD) from phenolic resin/poly(vinyl butyral) and successive curing and carbonization. In the present study, phenolic resin (thermostable 3-dimensional cross-linked polymer) was used for ESD and successive carbonization. The bead-free fiber was obtained by ESD from a phenolic resin solution with concentration above 55 wt %. The as-deposited fabrics, however, were very brittle. The addition of poly (vinyl butyral) (M w ¼ 110;000) improved the dimensional stability of the as-deposited fabrics. After carbonization of the as-deposited fabrics, the flexible carbon fiber fabrics were obtained. The carbon fiber fabrics showed relatively high electrical conductivity and a large specific surface area (BET surface area = 495 m 2 /g Recently, increasing attention to nanomaterials has been focused on the carbon-based ones such as carbon nanotube (CNT), carbon nanofiber, and fullerene due to their electrical, thermal, and mechanical properties. Particularly, carbon nanofiber has a high surface area, lightweight, high electrical conductivity (comparable to CNT), 1 and is low-cost in the production process. 2-4In addition, it is pointed out that carbon fibers with thinner diameters have a higher specific surface area and a higher electrical conductivity. In the cases of both carbon nanofibers and assemblies of carbon nanofibers, a free-standing carbon fibrous fabric is required for the applications such as electrodes, super capacitors, catalyst supports, emitter, sensor substrates, filter media, and reinforcements. If this fabric is flexible, its application is expanded much more. Conventional carbon fibers are produced by melt spinning and chemical vapor deposition (CVD). The melt spinning produces carbon fibers with diameters of more than 5 mm. The CVD method, on the other hand, synthesizes carbon fibers with diameters ranging from 10 nm to several microns. 5,6 CVD, however, is not suitable for producing long fibers and nonwoven fabrics.Electrospray deposition (ESD) has been expected to prepare a free-standing carbon fibrous fabric. ESD is a straightforward and versatile method for forming thin films.7 One major advantages of ESD is easily forming nano-microscaled fibrous fibers (typically nonwoven fabrics) from organic and inorganic materials. 8-11The ESD methods consist of the following steps; (i) a strong electric field is applied between a nozzle containing the polymer solution and a conductive substrate, (ii) when the voltage reaches a critical value, electrostatic forces overcome the surface tension of the solution, (iii) charged droplets (or jets) are sprayed from the tip of the nozzle, in a dry atmosphere; and (iv) the dried droplets (or jets) are finally collected on the substrate to form a thin film. [12][13][14] We can control the fiber diameter by changing the solution properties (e.g., viscosity) and operational conditions (e.g., the distance between the nozzle tip and the substrate surface, the flow rate, an...

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Poly(ethylene oxide) thin films produced by electrospray deposition: morphology control and additive effects of alcohols on nanostructure

Cited by 81 publications

References 28 publications

Formation of β-Phase Crystalline Structure of PVDF Nanofiber by Electrospray Deposition: Additive Effect of Ionic Fluorinated Surfactant

Formation of β-Phase Crystalline Structure of PVDF Nanofiber by Electrospray Deposition: Additive Effect of Ionic Fluorinated Surfactant

Control over Color of Nanotextured Coatings by Electrospray Deposition

Preparation of Carbon Fiber Fabrics from Phenolic Resin by Electrospray Deposition

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