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Apparatus and Method for Producing Electrospun Fibers

a technology of electrospun fibers and apparatuses, applied in the field of fibers, can solve the problems of cellulose being difficult to transform into fibers, and substantially insoluble in common solvents

Inactive Publication Date: 2008-12-04
CORNELL RES FOUNDATION INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0004]The present invention relates to improved fibers co

Problems solved by technology

Yet, cellulose has proven difficult to transform into fibers because of its relatively high degree of intermolecular and intermolecular hydrogen bonding, which renders it substantially insoluble in common solvents.

Method used

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  • Apparatus and Method for Producing Electrospun Fibers
  • Apparatus and Method for Producing Electrospun Fibers
  • Apparatus and Method for Producing Electrospun Fibers

Examples

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Embodiment Construction

[0018]The nanofibers of the present invention may be made from organic polymeric starting materials. These organic polymeric starting materials are typically mixed with a solvent comprising a relatively high volatility (i.e., the readiness with which a material vaporizes), and then subjected to an electrospinning process. Ideally, the solvent is sufficiently volatile to substantially dissolve during the electrospinning process.

[0019]Nanofibers made in accordance with the present invention comprise an organic polymer, and typically exhibit fiber diameters between about 50.0 nm and 1.0 micron, more particularly between about 100.0 nm and 300.0 nm and still more particularly between about 100.0 nm and 200.0 mm. The nanofibers may be relatively amorphous, comprising a degree of crystallinity less than about 60% and more particularly between about 1.0% and 50.0% and still more particularly between about 1.0% and 40.0%. The degree of crystallinity is determined through X-ray diffraction p...

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Abstract

An apparatus for making electrspun fibers comprises a collector that may be submerged in a coagulation bath. The collector may be automatically movable between a first position and a second position, wherein at least a portion of the collected fibers are submerged in a coagulation bath in the first position and spaced apart from the coagulation bath in the second position. The collector may be a rotating collector. A process for making electrospun fibers comprises electrospinning a dispersion and collecting a plurality of electrospun fibers, followed by submerging the collected fibers in a coagulation bath.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS[0001]The instant application claims the benefit of U.S. Provisional Serial App. No. 60 / 747,340, which is incorporated by reference herein in its entirety. The instant application further claims the benefit of U.S. patent application Ser. No. 10 / 965,813, which, in turn, claims the benefit of U.S. Provisional Serial App. No. 60 / 583,358, both of which are incorporated by reference herein in their entirety.FIELD OF INVENTION[0002]The present invention relates to fibers and more particularly to methods for making cellulose nanofibers.BACKGROUND[0003]Various naturally occurring polymers are of particular interest due to their abundant availability and biodegradability. Cellulose, for example, is one of the most abundant naturally occurring polymers on earth, and finds use in countless applications. Yet, cellulose has proven difficult to transform into fibers because of its relatively high degree of intermolecular and intermolecular hydrogen bonding,...

Claims

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Application Information

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IPC IPC(8): D01D5/06
CPCD01D5/0046D01D5/0076D01F2/02
Inventor JOO, YONG LAKKIM, DAE-SIK
Owner CORNELL RES FOUNDATION INC
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