Structural studies of electrospun nylon 6 fibers from solution and melt

Cho, Daehwan; Zhmayev, Eduard; Joo, Yong Lak

doi:10.1016/j.polymer.2011.07.038

Cited by 56 publications

(32 citation statements)

References 39 publications

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“…The fiber mats were fabricated via two different electrospinning techniques of melt [18][19][20] and solution [21][22][23]. In the current study, two sorts of fiber mats having different diameters were electrospun from melt through two experimental conditions.…”

Section: Preparation Of Fiber Matsmentioning

confidence: 99%

Surface hydro-properties of electrospun fiber mats

et al. 2015

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Hydrophobic and hydrophilic properties (hydro-properties) on material surfaces have been an active research area due to their numerous practical applications. Various fiber mats were prepared to investigate the effect of fiber morphology on the surface properties. Four polymers with intrinsically different hydro-properties are used to fabricate the electrospun fibers with diameter ranging from 0.1 µm to 10 µm by both methods of melt and solution. The pore size, pore size distribution, porosity, and the surface roughness of electrospun fiber mats are evaluated by a Porometry and an image processing technique. The contact angles are measured to characterize the surface properties of fiber mats using the mixture solutions of water and ethanol. As a result, the pore size and surface roughness are closely related to the contact angles. The contact angle is highly increased with the large deviation of fiber diameter and the high surface roughness of fiber mats. It is noted that the designed surface property is achieved by modifying fiber morphology without any complex treatment of material surface.

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Section: Preparation Of Fiber Matsmentioning

confidence: 99%

Surface hydro-properties of electrospun fiber mats

et al. 2015

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“…Subjecting a semi-crystalline polymer fiber to heat treatment at a temperature above the crystallization temperature (T c ) of that fiber, but below the equilibrium melting temperature (T m ) of the polymer, can cause the melting of small, imperfect crystals, and the formation of larger, more perfect crystals within the fibers, thus creating a stiffer and tougher matrix [17,18]. With some amorphous polymer nonwovens, annealing has been shown to allow air or gas pockets within the fibers to diffuse out, creating stronger more uniform fibers [19].…”

Section: Introductionmentioning

confidence: 99%

Mechanical and tribological properties of electrospun PA 6(3)T fiber mats

Mannarino

2012

Polymer

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(G. C. Rutledge). AbstractThe mechanical and tribological properties of electrospun fiber mats are of paramount importance to their utility as components in a large number of applications. Although some mechanical properties of these mats have been reported previously, reports of their tribological properties are essentially nonexistent. In this work, electrospun nanofiber mats of poly(trimethyl hexamethylene terephthalamide) (PA 6(3)T) with average fiber diameter of 463±64 nm are characterized mechanically and tribologically. Post-spin thermal annealing was used to modify the properties of the fiber mats.Morphological changes, in-plane tensile response, friction coefficient and wear rate were characterized as functions of the annealing temperature. The Young's moduli, yield stresses and toughnesses of the nonwoven mats improved by two-to ten-fold when annealed slightly above the glass transition temperature, but at the expense of mat porosity. The coefficient of friction and the wear rate decrease by factors of two and ten, respectively, under the same conditions. The wear rate correlates with the yield properties of the mat, in accord with a modified Ratner-Lancaster model. The variation in mechanical and tribological properties of the mats with increasing annealing temperature is consistent with the formation of fiber-to-fiber junctions and a mechanism of abrasive wear that involves the breakage of fibers between junctions.

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“…36 It features very high conductivity and allows to produce nanofibers down to sub-100 nm range. An example of low conductivity solution is poly(D-L-lactic acid) (PLA) dissolved in dimethylformamide (DMF).…”

Section: Discussionmentioning

confidence: 99%

Dynamics of an electrically charged polymer jet

et al. 2013

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Subbotin, A.; Stepanyan, R.R.; Chiche, A.; Slot, J.J.M.; Brinke, ten, G. Document VersionPublisher's PDF, also known as Version of Record (includes final page, issue and volume numbers) Please check the document version of this publication:• A submitted manuscript is the author's version of the article upon submission and before peer-review. There can be important differences between the submitted version and the official published version of record. People interested in the research are advised to contact the author for the final version of the publication, or visit the DOI to the publisher's website.• The final author version and the galley proof are versions of the publication after peer review.• The final published version features the final layout of the paper including the volume, issue and page numbers. Link to publication General rightsCopyright and moral rights for the publications made accessible in the public portal are retained by the authors and/or other copyright owners and it is a condition of accessing publications that users recognise and abide by the legal requirements associated with these rights.• Users may download and print one copy of any publication from the public portal for the purpose of private study or research.• You may not further distribute the material or use it for any profit-making activity or commercial gain • You may freely distribute the URL identifying the publication in the public portal ? Take down policyIf you believe that this document breaches copyright please contact us providing details, and we will remove access to the work immediately and investigate your claim. Electro-hydrodynamic equations describing the behavior of a charged polymer jet are analyzed by analytical methods and scaling approach. A FENE-P constitutive equation is employed to describe the viscoelastic properties of a conducting polymer liquid. Effects of the electric field, the flow rate, and the material parameters on the jet dynamics are investigated. Four different regimes are examined. In particular, a regime in which the electric current is linearly proportional to the electric field and independent on the flow rate and a regime in which the electric current is linearly proportional to the flow rate and independent on the electric field are identified. An operating window limiting the region of a stable cone-jet mode is also considered. C 2013 AIP Publishing LLC. [http://dx

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Structural studies of electrospun nylon 6 fibers from solution and melt

Cited by 56 publications

References 39 publications

Surface hydro-properties of electrospun fiber mats

Surface hydro-properties of electrospun fiber mats

Mechanical and tribological properties of electrospun PA 6(3)T fiber mats

Dynamics of an electrically charged polymer jet

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