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Core-shell composite micron/nano fiber and preparation method thereof

A technology of composite fiber and core-shell structure, applied in fiber treatment, fiber chemical characteristics, chemical instruments and methods, etc., can solve limitations and other problems, achieve high encapsulation rate, stable structure effect, and avoid denaturation

Active Publication Date: 2006-07-26
重庆大清医疗器械有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, current electrospinning technology is still limited to processing homogeneous systems such as polymer solutions or melts.

Method used

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  • Core-shell composite micron/nano fiber and preparation method thereof
  • Core-shell composite micron/nano fiber and preparation method thereof
  • Core-shell composite micron/nano fiber and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] 1. The polystyrene microspheres prepared in aqueous phase by emulsion method, its solid content is 10%, and the average diameter of microspheres is 500 nanometers.

[0035] 2. Add 0.6 g of polyvinyl alcohol to 10 g of the emulsion to dissolve the polyvinyl alcohol to form a two-phase polymer spinning solution.

[0036] 3. Add the prepared spinning solution into the liquid storage tank of the electrospinning device (such as Figure 4 Shown), using No. 9 flat spinneret, the flow rate of the spinning solution is 0.1ml / h, and the applied voltage is 5kV for electrospinning. A polyvinyl alcohol nanofiber film embedded with polystyrene microspheres was obtained on a receiver at 15 cm below the spinneret. The fibers have an average diameter of about 400 microns. Its microstructure is as figure 1 shown.

Embodiment 2

[0038] 1. The calcium alginate microsphere emulsion that is loaded with transforming growth factor (TGF-β) prepared in chloroform, its solid content is 5%, microsphere average diameter 5 microns.

[0039] 2. Add 0.1 g of polylactic acid to 10 g of this emulsion, stir to fully dissolve PLLA, and prepare a polymer spinning solution with two-phase components.

[0040] 3. Add the prepared spinning solution into the liquid storage tank of the electrospinning device (such as Figure 4 Shown), using the No. 9 flat spinneret, the flow rate of the spinning solution is 0.8ml / h, and the applied voltage is 40kV for electrospinning. Polylactic acid composite fibers embedded with calcium alginate microspheres were obtained on a receiver 15 cm below the spinneret. The average fiber diameter is about 4.5 microns, and its microstructure is as follows figure 2 and image 3 shown.

Embodiment 3

[0042] 1. the calcium alginate microsphere emulsion that is loaded with nerve growth factor (NGF) prepared in chloroform, solid content 5%, microsphere average diameter 15 microns

[0043] 2. Mix the emulsion with polypropylene carbonate and tacrolimus (FK506) in a mass ratio of 100:43:1, stir to dissolve the solids fully, and prepare a polymer spinning solution with two-phase components.

[0044] 3. Add the prepared spinning solution into the liquid storage tank of the electrospinning device (such as Figure 4 Shown), using No. 9 flat spinneret, the flow rate of the spinning solution is 4ml / h, and the applied voltage is 5kV for electrospinning. Polypropylene carbonate composite fibers embedded with calcium alginate microspheres were obtained on a receiver at 15 cm below the spinneret. The fibers are about 10 microns in diameter.

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Abstract

The invention discloses a core-shell structure composite fiber and preparing method in the functional fibre preparing technique domain, which is characterized by the following: the material of composite fiber is functional microballoon / microcapsule; the shell material is oil soluble high molecular polymer or water-soluble high molecular polymer; the embedded functional microballoon / microcapsule is distributed over the inner fibre of high molecular polymer to form core-shell structure composite fiber; the polymer fluid of multiphase component forms composite embedding structure directly by the action of high-voltage electric field.

Description

technical field [0001] The invention relates to a composite fiber with a core-shell structure at the micro-nano scale and a preparation method thereof, belonging to the technical field of preparation of functional fibers. Background technique [0002] The core-shell structure refers to dispersed solid matter particles, liquid droplets or gases completely encapsulated in a film of another material to form an inner and outer multi-layer structure. The appearance of the structural material can be either a spherical microcapsule or a fibrous composite film. This structure has the following basic functions: encapsulating liquid materials into solid carriers to change the apparent properties; dispersing aggregates into the capsule to avoid agglomeration; protecting easily volatile and denatured substances in the shell; Adjusting the properties of the outer membrane controls the osmotic release rate of the inner material to the outside. Therefore, it has broad applications in the...

Claims

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Application Information

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IPC IPC(8): D01D5/00D01F1/10C09K3/00
Inventor 胡平齐宏旭施一平
Owner 重庆大清医疗器械有限公司
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