Fibre-forming process and fibres produced by the process

A fiber forming and fiber technology, applied in the direction of short fiber formation, fiber processing, fiber chemical characteristics, etc., can solve the problems of low productivity, difficult post-processing of polymer fibers, etc.

Active Publication Date: 2014-09-03
HEIQ
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

While the technique ensures a high degree of control over morphology and size, post-processi

Method used

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  • Fibre-forming process and fibres produced by the process
  • Fibre-forming process and fibres produced by the process
  • Fibre-forming process and fibres produced by the process

Examples

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[0201] The following examples further illustrate the invention, but the examples should in no way be construed as limiting the scope of the invention as described herein.

[0202] General Experimental Procedure

[0203] Polymer solutions are prepared by dissolving the desired amount of polymer in a solvent with stirring. If necessary, the solution may be treated with heat, acid or base to aid dissolution of the polymer.

[0204] A volume of the selected dispersion medium (250-400ml) is introduced into a suitable vessel and a shear head with a high speed mixer (eg: T50 UltraTurrax - IKA fitted with a high shear impeller) is then submerged in it.

[0205] After starting stirring, the required volume of fiber forming liquid (eg 3-5 ml) is introduced into the gap between the mixer head and the beaker wall by means of injection (ie using a syringe pump). In the reported example, a 3 mL syringe with a 23G needle was used to inject the fiber forming liquid, and the injection speed ...

example 89

[0231] Preparation of Poly(ethylene-co-acrylic acid)(PEAA) Fibers from Magnetic Nanoparticles

[0232] Poly(ethylene-co-acrylic acid) (PEAA) (Dow Chemical, Primacor TM 59901) in a 20% wt / vol solution, stirred overnight at 95°C. Magnetic nanoparticles were then added to this solution, and then diluted with pH 12 ammonia to a final solution concentration of 8% (w / v) PEAA. 1-Butanol (250ml) was added to a beaker of a high speed mixer (T50 UltraTurrax-IKA) equipped with a high shear impeller. Insert the stir head into the beaker and start stirring. The polymer solution (3ml) with magnetic nanoparticles was then rapidly injected into the gap between the mixer head and the beaker wall using a 3mL syringe with a 27G needle, injection speed: 20mL / min. Stirring was continued for a certain period of time and then stopped. The resulting fibers were washed with the precipitation medium (n-butanol).

[0233] The magnetic nanoparticles were encapsulated with PEAA fibers, and as Figur...

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Abstract

The present invention relates to a process for the preparation of fibres and fibres prepared by the process. The process can provide discontinuous colloidal polymer fibres in a process that employs a low viscosity dispersion medium.

Description

technical field [0001] The present invention generally relates to a method of making fibers. The invention also relates to fibers produced by this method. The fibers produced by this method may be discontinuous colloidal polymer fibers. Background technique [0002] Polymer fibers can be prepared using a number of different techniques. One available technique is electrospinning, which produces continuous polymer fibers with controllable fiber diameter, composition, and fiber orientation. However, while this technique is relatively simple and has wide applicability, it is generally not suitable for producing discontinuous polymer fibers. [0003] Instead, templating techniques such as template replication and microfluidics can be used to produce discontinuous polymer fibers. While the technique ensures a high degree of control over morphology and size, the post-processing required to recover polymer fibers is often difficult and results in very low productivity. [0004]...

Claims

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Application Information

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IPC IPC(8): D01D5/40D01D5/06D01D5/26D01F1/00D01F2/00D01F6/00
CPCD01F9/00D01F6/625D01D5/40D01F6/30D01F1/10D01D5/06D01F6/36D01F6/22D04H1/4326D01D5/26D01F4/02D01F6/16
Inventor 亚历山德拉·苏提林彤马克·亚历山大·柯克兰
Owner HEIQ
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