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Electro-blowing technology for fabrication of fibrous articles and its applications of hyaluronan

一种透明质酸、电吹的技术，应用在纤维处理、短纤维形成、纤维化学特征等方向，能够解决批量生产不切实际等问题

Inactive Publication Date: 2006-08-23
INST OF CHEM CHINESE ACAD OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The simple multi-port arrangement used in high-speed melt spinning is no longer suitable for electrospinning, because the electric fields formed by adjacent spinnerets will interfere with each other, so it is impractical to use this method for mass production

Method used

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  • Electro-blowing technology for fabrication of fibrous articles and its applications of hyaluronan
  • Electro-blowing technology for fabrication of fibrous articles and its applications of hyaluronan
  • Electro-blowing technology for fabrication of fibrous articles and its applications of hyaluronan

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0097] After briefly describing the invention, it will be further understood through some specific reference examples. The examples provided herein are for illustrative purposes only and are not intended to limit process conditions unless otherwise stated.

[0098] Unless otherwise specified, the following are the hyaluronic acid (HA) electroblowing process conditions.

[0099] 1. Hyaluronic acid (HA) concentration: 2.5% (w / v), HA-C in acidic aqueous solution (MW: 3.5×10 6 )

[0100] 2. Solution feeding rate: 40μl / min

[0101] 3. Electric field voltage: 40kV

[0102] 4. Electrode spacing: 9.5cm

[0103]

HA sample

Preparation

molecular weight

NaCl content

(wt%)

viscosity

(Pa·s at 1s -1 )

HA-C

Provided by Denka

3,500,000

0

21(0.7％)

HA-B

Provided by Denka

200,000

1.6

27(10％)

HA-A

Provided by Denka

45,000

2.1

13(25％)

...

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Abstract

A method for electroblowing fibers is provided which involves the steps of: forcing a polymer fluid through a spinneret in a first direction towards a collector located a first distance from the spinneret, while simultaneously blowing a gas through an orifice that is substantially concentrically arranged around the spinneret, wherein the gas is blown substantially in the first direction; wherein an electrostatic differential is generated between the spinneret and the collector; and collecting the fibers, and its use in preparing submicron scale fibers of various types, particularly hyaluronan fibers, and the hyaluronan nanofibers thus formed.

Description

technical field [0001] This case involves a technology of combining electrospinning and electroblowing to manufacture nanofiber filaments, its application to hyaluronic acid, and the nanofiber material obtained therefrom. Background technique [0002] Electrospinning is a commonly used technique for preparing polymer microfibers. When an external electric field is applied to a conductive fluid (such as a charged polymer sub-concentrated solution or a charged polymer melt), a conical suspended droplet is formed whose surface tension is balanced by the electric field. Electrospinning occurs when the force of the applied electric field is sufficient to overcome the surface tension of the fluid, at which point the droplet becomes unstable and a small sputtering stream is ejected from the surface of the particle. The sputtering flow reaches the grounded receiving plate, forming an interconnected submicron fiber network, and the formed non-woven nanofibrous film has a high specif...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01D5/08D01D5/098D01D5/26H05B7/00B29C47/00D01DD01D5/00
CPCD01F9/00D01D5/0069
Inventor 朱鹏年萧守道方渡飞冈本彰夫韩志超
Owner INST OF CHEM CHINESE ACAD OF SCI
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