Cellulose diacetate fibrous membrane and preparing method thereof

A technology of cellulose diacetate and fiber film, which is used in fiber processing, non-woven fabric, filament/thread forming, etc., can solve problems such as long process flow, and achieve the effects of low cost, large specific surface area, and easy control of process conditions.

Active Publication Date: 2018-09-04
NANTONG TEXTILE & SILK IND TECH RES INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the polymer used is polylactic acid, the obtained fiber has a circular cross-section, and the micropores on the fiber are obtained by etching to remove a component in the fiber. It is necessary to add an etching process after electrospinning. longer

Method used

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  • Cellulose diacetate fibrous membrane and preparing method thereof
  • Cellulose diacetate fibrous membrane and preparing method thereof
  • Cellulose diacetate fibrous membrane and preparing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The present embodiment provides a kind of porous flat section cellulose diacetate fiber membrane, and its preparation method is as follows:

[0026] (1) The composition of the spinning solution: the mass concentration of cellulose diacetate (relative average molecular weight: 40,000) is 8%, the mass of polyethylene oxide is 5% (relative to the mass of cellulose diacetate), the total mass of acetone and water The concentration is 92%, and the volume ratio of acetone and water is 5:1.

[0027] (2) Spinning process: Under the control of the flow pump, the cellulose diacetate solution is extruded from the round metal needle of the 10ml syringe at a speed of 2.5ml / h, and is accelerated to move forward under the action of an electric field force of 15kv. The atmospheric environment with a relative humidity of 29% and a temperature of 21°C finally falls on a metal receiving device with an aluminum foil at a distance of 14cm from the metal needle to obtain a porous flat-section...

Embodiment 2

[0031] The steps of preparing porous flat section cellulose diacetate fiber membrane in this embodiment are as follows:

[0032] (1) The composition of the spinning solution: the mass concentration of cellulose diacetate (relative average molecular weight: 40,000) is 8%, the mass of polyethylene oxide is 5% (relative to the mass of cellulose diacetate), the total mass of acetone and water The concentration is 92%, and the volume ratio of acetone and water is 3:1.

[0033] (2) The spinning process is the same as in Example 1.

[0034] See Attachment 2, which is the scanning electron micrograph of the porous flat-section cellulose diacetate fiber membrane prepared with the mixed solvent of acetone and water at a volume ratio of 3:1 in this example, (a) is the magnification of the fiber membrane at 1000 times; (b) The magnification of the fiber membrane is 10000 times.

[0035] The pores on the surface of the fibers constituting the fiber membrane have a pore diameter of 23.3-2...

Embodiment 3

[0037] The present embodiment prepares porous flat section cellulose diacetate fiber membrane as follows:

[0038] The composition of spinning solution: the mass concentration of cellulose diacetate (relative average molecular weight is 40000) is 6%, the mass of polyethylene oxide is 15% (relative to the mass of cellulose diacetate), the total mass concentration of acetone and dichloromethane 94%, the volume ratio of acetone and dichloromethane is 2:1.

[0039] Spinning process: Under the control of the flow pump, the cellulose diacetate solution is extruded from the circular metal needle of the 10ml syringe at a speed of 1ml / h, and is accelerated to move forward under the action of an electric field force of 12kv, and the relative humidity is 81 %, the atmospheric environment with a temperature of 26°C, finally falls on the metal receiving device with aluminum foil at a distance of 12cm from the metal needle, and obtains a porous flat-section cellulose diacetate fiber membran...

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Abstract

The invention discloses a cellulose diacetate fibrous membrane and a preparing method thereof. Cellulose diacetate powder is dissolved in acetone/water or a mixed solvent of acetone/dichloromethane tobe prepared into a spinning solution, an electrostatic spinning technology is adopted, under the effect of electrostatic high-voltage electric field stress, the cellulose diacetate spinning solutionis drafted into fibers, and the fibers are cured on a receiver to form the fibrous membrane. According to the technical scheme, the preparing method is easy to operate, and the condition is easy to control. The fibers in the prepared cellulose diacetate fibrous membrane are thin, the diameter reaches the macron order, the surface of the fibers has a porous structure, the cross section of the fibers is flat, the specific area of the fibrous membrane is large, the adsorbing performance is excellent, and the cellulose diacetate fibrous membrane has a good application prospect in the fields like biological dressing, drug sustained release and tissue stent.

Description

technical field [0001] The invention relates to a cellulose diacetate fiber membrane and a preparation method thereof, in particular to a membrane composed of cellulose diacetate fibers with flat cross-section and porous surface and a preparation method thereof. Background technique [0002] At present, people have an urgent demand for materials with strong adsorption capacity and good filtration effect in the fields of controlled drug release, tissue engineering, biological dressings, biofilms, and filtration separation. The fiber membrane prepared by electrospinning technology has the characteristics of small fiber diameter, large specific surface area and strong adsorption capacity, and has broad application prospects in the fields of biomedicine, filtration and separation. However, most of the fibers in the fiber membranes prepared by electrospinning technology are circular in cross-section and have no holes on the surface. Flat cross-section fibers have a larger specif...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D04H1/4258D04H1/728D01D5/00D01D5/247D01D5/253
CPCD01D5/003D01D5/0061D01D5/0092D01D5/247D01D5/253D04H1/4258D04H1/728
Inventor 杨旭红李冰艳
Owner NANTONG TEXTILE & SILK IND TECH RES INST
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