WO2006089529A1 - Invention concernant le dimensionnement de meso- et nanostructures - Google Patents

Invention concernant le dimensionnement de meso- et nanostructures Download PDF

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Publication number
WO2006089529A1
WO2006089529A1 PCT/DE2006/000324 DE2006000324W WO2006089529A1 WO 2006089529 A1 WO2006089529 A1 WO 2006089529A1 DE 2006000324 W DE2006000324 W DE 2006000324W WO 2006089529 A1 WO2006089529 A1 WO 2006089529A1
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WO
WIPO (PCT)
Prior art keywords
fibers
cut
structures
meso
cutting
Prior art date
Application number
PCT/DE2006/000324
Other languages
German (de)
English (en)
Inventor
Andreas Greiner
Mathias Becker
Original Assignee
Philipps-Universität Marburg
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Philipps-Universität Marburg filed Critical Philipps-Universität Marburg
Publication of WO2006089529A1 publication Critical patent/WO2006089529A1/fr

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Classifications

    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
    • D01D5/00—Formation of filaments, threads, or the like
    • D01D5/26—Formation of staple fibres

Definitions

  • the invention relates to the field of sizing of meso- and nanostructures.
  • Electrospinning certainly constitutes one of the currently most important methods in science and technology for the production of meso- and nanostructures, in particular polymers, i.
  • a polymer melt or polymer solution is exposed to a high electric field on a cannula or tip serving as an electrode.
  • electrostatic charging of the polymer melt or polymer solution a flow of material directed at the counter electrode is formed, which solidifies on the way to the counter electrode.
  • nonwovens or ensembles of ordered fibers are obtained.
  • polymer melts so far only fibers with diameters significantly greater than 1 micron are obtained, one can produce from polymer solutions fibers with diameters down to 5 nm.
  • fibers with diameters smaller than 1 ⁇ m are particularly technical interest, e.g. for filtration applications.
  • FIGS. A and B show the results of cutting tests on structures in the range of 0.3 to 3 ⁇ m, the structures consisting of polyamide 6 (FIG. 1A) and polylactide (FIG. 1B, PLA). The cutting experiments were carried out with a scalpel at room temperature.
  • the object is to provide a method with which it is possible to dimension meso or nanostructures consisting of one or more materials, preferably including at least one polymer so that a deformation of the structures and / or connection of the structures with other structures at the points of intervention for sizing - usually for shortening or reduction - as completely as possible avoided.
  • Electrospun cut fibers of defined length after or during the manufacturing process are produced. A filming of the cut fiber ends should not occur, otherwise the properties of isolated cut fibers is lost.
  • Fibers of particularly uniform length have been coated with already, i. see, inter alia, Hou et al; DE 0010053263A1, 08.05.2002; Dersch et al., J. Polym., Part: Polym., Chem., Ed., 41, 545 (2003) In principle, however, unoriented fibers can also be cut as described.
  • Preparation and cutting of oriented electrospun fibers Polyamide 6 fibers, polylactide fibers, and poly (methyl methacrylate) fibers were first prepared by electrospinning the polymer solutions onto paper. Sufficient parallel orientation was achieved by using a fast rotating metal roller as the counter electrode.
  • Another method for producing a parallel orientation of the fibers is to wind the fibers on a substantially rectangular structure, which by the Electrospinning used at least one electrode in the region of the exit opening of the thread or the later fiber, is polarizable. That is, the structure then acts as a counter electrode and the two longer sides of the substantially rectangular structures provide an orientation of the fibers.
  • a rectangular and rotating metal frame is used, which can be filled in hollow or with a non-polarizable medium.
  • the paper thus coated with polymer fibers was then cooled in a metal bowl in a cold bath with liquid nitrogen to - 196 ° C and cut with a likewise cooled metal blade (see Fig. 2 C, D, E).
  • the figures show from left to right with a scalpel under liquid nitrogen cut fiber mats of polyamide 6 (C), polylactide (D), poly (methyl methacrylate) (E, PMMA). In all structures, no significant deformations or even sticking of the fiber ends were found.
  • Chopped fibers of defined length When cutting with a scalpel initially no chopped fibers of uniform length were produced. Only cutting with blade blocks, consisting of several mutually parallel blades of disposable razors, led to cut fibers of defined length (see Fig. 3 F, G). Fig. 3 shows 80 ⁇ m short cut fibers of PLA (F) and PMMA (G) by cutting with a blade block.
  • H, J shows about 50 (H) to about 80 (J) microns short cut fibers of PLA between the blades in the blade block.
  • K, L shows about 50 (K) to about 80 (L) microns short cut PMMA fibers between the blades in the blade block.
  • Nano and meso tubes or multi-layer nano and meso ribbons or cables, or nanostructured surface (e.g., apertured) nano and meso tubes e.g. Nano and meso tubes or multi-layer nano and meso ribbons or cables, or nanostructured surface (e.g., apertured) nano and meso tubes.
  • an electrospinning apparatus with a metal tip acting as a nozzle to which a first high potential was applied (and to which a chamber under pressure with the polymer mixture to be spun connected) equipped with a rectangular metal frame as a counter electrode.
  • a substantially unpolarisierbares material was attached, which then attached to a cutting edge provided with cutting device as a mating surface. That The fibers oriented between the edges of the metal frame, substantially parallel to the longer metal edges, were then reduced by pressing the cutting edges against the surface of the unpolarizable material.
  • the cutting device was matched in its movement to the movement of the rotating metal frame, that the cut was always carried out when a surface of the unpolarisierbaren material was on the, the nozzle side facing away. The cut was carried out while performing a relative to the cut edges rolling movement.
  • the self-rotating cutting device had to two surfaces
  • the washout was then performed on the surface, which was not in cutting interaction with the metal frame.
  • Liquid surface are collected.
  • a cutting device which consists of a plurality of cutting edges, which lie on a
  • Fig. 1 cut with a scalpel at room temperature electrospun
  • Fig. 2 cut with a scalpel under liquid nitrogen fiber mat
  • Fig. 3 80 micron short cut fibers of PLA (F) and PMMA (G) by cutting with a blade block
  • Fig. 5 Overview (K) and detail (L) of 80 micron short cut fibers of PMMA between the blades in the blade block
  • Fig. 6 blade block with and without spacer (M) and 600 microns long

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Nonwoven Fabrics (AREA)
  • Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)

Abstract

L'invention se rapporte au domaine du dimensionnement ou de la confection de méso- et nanostructures présentant une dimension comprise entre 1 nm et 1 000 ?m au moyen d'une arête de coupe et par un refroidissement approprié.
PCT/DE2006/000324 2005-02-25 2006-02-24 Invention concernant le dimensionnement de meso- et nanostructures WO2006089529A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102005009212.8 2005-02-25
DE200510009212 DE102005009212A1 (de) 2005-02-25 2005-02-25 Erfindung betreffend die Dimensionierung von Meso- und Nanostrukturen

Publications (1)

Publication Number Publication Date
WO2006089529A1 true WO2006089529A1 (fr) 2006-08-31

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE2006/000324 WO2006089529A1 (fr) 2005-02-25 2006-02-24 Invention concernant le dimensionnement de meso- et nanostructures

Country Status (2)

Country Link
DE (1) DE102005009212A1 (fr)
WO (1) WO2006089529A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017184725A1 (fr) 2016-04-20 2017-10-26 Clarcor Inc. Pâte de fibre fine de filage, et support de filtre déposé par voie humide
WO2021081573A1 (fr) * 2019-10-28 2021-05-06 ITK - Innovative Technologies by Klepsch GmbH Dispositif pour fabriquer des fibres courtes de polymère électrofilées

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009035113A1 (de) 2009-07-29 2011-02-03 Philipps-Universität Marburg Vorrichtung und Verfahren zur Herstellung von kurzen Fasern

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2248067A1 (de) * 1972-09-30 1974-04-04 Messer Griesheim Gmbh Verfahren zur herstellung von schneidflock
JPS59163430A (ja) * 1983-03-07 1984-09-14 Asahi Chem Ind Co Ltd 紡績糸の製造方法
DE10023456A1 (de) * 1999-07-29 2001-02-01 Creavis Tech & Innovation Gmbh Meso- und Nanoröhren

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2248067A1 (de) * 1972-09-30 1974-04-04 Messer Griesheim Gmbh Verfahren zur herstellung von schneidflock
JPS59163430A (ja) * 1983-03-07 1984-09-14 Asahi Chem Ind Co Ltd 紡績糸の製造方法
DE10023456A1 (de) * 1999-07-29 2001-02-01 Creavis Tech & Innovation Gmbh Meso- und Nanoröhren

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 009, no. 012 (C - 261) 18 January 1985 (1985-01-18) *

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017184725A1 (fr) 2016-04-20 2017-10-26 Clarcor Inc. Pâte de fibre fine de filage, et support de filtre déposé par voie humide
EP3445898A4 (fr) * 2016-04-20 2019-05-08 Clarcor, Inc. Pâte de fibre fine de filage, et support de filtre déposé par voie humide
WO2021081573A1 (fr) * 2019-10-28 2021-05-06 ITK - Innovative Technologies by Klepsch GmbH Dispositif pour fabriquer des fibres courtes de polymère électrofilées
CN114929954A (zh) * 2019-10-28 2022-08-19 Itk-克勒普施创新技术有限公司 用于制造电纺聚合物短纤维的装置
CN114929954B (zh) * 2019-10-28 2024-03-12 Itk-克勒普施创新技术有限公司 用于制造电纺聚合物短纤维的装置

Also Published As

Publication number Publication date
DE102005009212A1 (de) 2006-08-31

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