Technicka Univerzita V Liberci

Clemson University

Egu—hv Laboratory A.s.

Technicka Universita V Liberci

Univerzita Karlova

Ustav Organicke Chemie a Biochemie Akademie Ved Ceske Republiky, V.v.i.

David Lukas

Jaroslav Beran

Petr Mikes

Pavel Pokorny

Martin Bilek

Jan Valtera

Ondrej Batka

Josef Skrivanek

Jiri Chvojka

Tomas Kalous

Filip Sanetrnik

Eva Kostakova

Oldrich Jirsak

Evzen Amler

Jiri Chaloupek

Lenka Martinova

Matej Buzgo

Chen-Chih Tsai

Konstantin G Kornev

Andrea Mickova

Lubomir Kocis

Julie Soukupova

Eva Kuzelova-Kostakova

Jiri Komarek

Petr Zabka

Dominik Rejman

Martin Diblik

Nikifor Asatiani

Duy Dinh Do Pham

Eva Kuzelova Kostakova

Vera Jencova

Viktor Mojr

Kristyna Havlickova

Robert Zajicek

Vaclav Kotek

A method, system, and resulting linear fibrous formation are provided wherein a supporting linear formation defines a core that is transported through a spinning chamber. A coating of polymeric nanofibers enveloping the supporting linear formation in the spinning chamber. The coating of polymeric nanofibers comprises a flat stripe wound around the core into a helical form, the flat stripe created from a hollow electrically neutral nanofibrous plume generated in a spinning space above a spinning electrode during spinning by AC electric voltage in the spinning chamber.

Linear fibrous formation with a coating of polymeric nanofibers enveloping a supporting linear formation constituting a core, a method and a device for producing it

The invention relates to a spinning electrode () for producing polymeric nanofibers by electrospinning of a polymer solution or polymer melt, containing an inlet pipe () of the polymer solution or melt, which ends on its top face (), whereby around at least a part of the mouth () on the top face of the inlet pipe () of the polymer solution or melt is formed a spinning surface () rounded downwards below the mouth (), whereby the spinning surface () continues as a collecting surface () on the outer surface of the inlet pipe () of the polymer solution or melt. The invention also relates to a device for producing nanofibers by electrospinning of a polymer solution or melt, which is equipped with at least one spinning electrode () according to the invention. In addition, the invention relates to a method for producing nanofibers by electrospinning of a polymer solution or melt, which is based on using the spinning electrode according to the invention.

Method for producing polymeric nanofibers by electrospinning of a polymer solution or melt, a spinning electrode for performing the method and a device for producing polymeric nanofibers equipped with at least one such spinning electrode

The invention relates to a method for production of polymeric nanofibers, in which polymeric nanofibers are created due to the action of force of an electric field on solution or melt of a polymer, which is located on the surface of a spinning electrode, whereby the electric field for electrostatic spinning is created alternately between the spinning electrode (), to which is supplied alternating voltage, and ions () of air and/or gas generated and/or supplied to proximity of the spinning electrode (), whereby according to the phase of the alternating voltage on the spinning electrode () polymeric nanofibers with an electric charge of opposite polarity and/or with segments with an electric charge of opposite polarity are created, which after their creation cluster together under the influence of the electrostatic forces into linear formation in the form of a tow or a band, which moves freely in space in direction of gradient of the electric fields away from the spinning electrode (). The invention further relates to a linear formation from polymeric nanofibers fabricated by this method.

Method for production of polymeric nanofibers by spinning of solution or melt of polymer in electric field

A fluidic probe comprising a plurality of oriented fibers with individual fibers having nano-pores in the fiber bodies, the oriented fibers being twisted together, wherein the twisted oriented fibers form micro-pores between the individual fibers, is disclosed. The fluidic probe exhibits excellent flexibility, deployability and absorptive capacity. The enhanced absorptive capacity is due to the fluid absorption via capillary action of the nano-pores and fluid transport via the micro-pores. The probes can also be formed so as to be remotely controlled by electromagnetic fields and thus be used in a hands-free fashion. With these probes, the paradigm of a stationary microfluidic platform can be shifted to include flexible structures that can include multiple microfluidic sensors in a single fibrous probe.

Flexible fiber-based micro and nanofluidics for probing liquids

A method of nanofibers production from a polymer solution uses electrostatic spinning in an electric field created by a potential difference between a charged electrode and a counter electrode. The polymer solution for spinning is supplied into the electric field using the surface of a rotating charged electrode. On a part of the circumference of the charged electrode near to the counter electrode, a spinning surface is created for attaining a high spinning capacity. In a device for carrying out the method, the charged electrode is pivoted and part of its circumference is immersed in the polymer solution. The free part of the circumference of the charged electrode is positioned opposite the counter electrode.

Method of nanofibres production from a polymer solution using electrostatic spinning and a device for carrying out the method

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Liberec, Czechia

David Lukas