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Electrostatic spinning method for sodium alginate nano fibers

A technology of sodium alginate and electrospinning, which is applied in the direction of electrospinning, alginate artificial filament, fiber treatment, etc. It can solve the problems of continuous electrospinning forming difficulties and achieve uniform crosslinking degree and low price. Inexpensive, simple process control effect

Active Publication Date: 2017-01-04
QINGDAO UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] The technical problem that the present invention needs to solve for realizing above-mentioned object is, how to obtain the idealized molecular chain of sodium alginate and between the molecular chains firmly, stable, uniform effective entanglement (degree), to stabilize the spinning solution Viscosity performance index, and then effectively solve the technical problem of continuous electrospinning forming difficulties

Method used

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  • Electrostatic spinning method for sodium alginate nano fibers

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] The electrospinning method of sodium alginate nanofiber comprises the following steps:

[0058] The first step, raw material preparation

[0059] In parts by mass, 4 parts of anhydrous sodium sulfate, 1 part of mixed anhydride of acetic anhydride and adipic acid, and 6 parts of sodium alginate were respectively taken;

[0060] Dissolve the obtained anhydrous sodium sulfate in water to prepare a saturated solution, add the obtained mixed acid anhydride to the saturated sodium sulfate solution, adjust the pH value to 1-2, and prepare a coagulation bath for later use;

[0061] The second step, the preparation of spinning solution

[0062] (1), dissolving the sodium alginate taken in deionized water, and preparing a sodium alginate solution with a mass percent concentration of 6%;

[0063] Then, slowly add the prepared sodium alginate solution into the coagulation bath while stirring, and continue to stir for 3 hours until a chemically cross-linked sodium alginate gel is ...

Embodiment 2

[0078] In addition to "the first step, raw material preparation: in parts by mass, take 5 parts of anhydrous sodium sulfate, 5 parts of acetic anhydride and adipic acid mixed anhydride, and 12 parts of sodium alginate;

[0079] All the other are the same as in Example 1.

[0080] After testing, the diameter of the prepared sodium alginate nanofibers is: 145nm±20nm.

Embodiment 3

[0082] In addition to "the first step, raw material preparation: according to the parts by mass, take 4.5 parts of anhydrous sodium sulfate, 3 parts of acetic anhydride and adipic acid mixed anhydride, 10 parts of sodium alginate

[0083] Except; All the other are with embodiment 1.

[0084] After testing, the diameter of the prepared sodium alginate nanofibers is: 125nm±13nm.

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Abstract

The invention discloses an electrostatic spinning method for sodium alginate nano fibers. Based on the prior art, sodium alginate is chemically cross-linked by using acetic anhydride and adipic acid mixed anhydride as a chemical cross-linker, and the cross-linked sodium alginate gel is dried by combining liquid nitrogen quick freezing with freeze drying to control the direction of reversible reaction and further strengthen the cross-linking effect, thereby well solving a series of problems of low degree and instability of cross-linking of molecular chains, poor spinnability, poor uniformity of spun internal fiber microstructure and the like in the prior art. More importantly, the viscosity of the spinning solution as an important spinning index can be effectively guaranteed to be stabilized within a narrow ideal range all the time, so that a continuous production process is guaranteed. The production process is continuous and stable, the process control is simple, the thickness of fibers is uniform, the product quality is guaranteed and the stability is good.

Description

technical field [0001] The invention relates to a production method of sodium alginate nanofibers, in particular to an electrospinning method of sodium alginate nanofibers. Background technique [0002] Electrospinning has the advantages of simple manufacturing equipment, low spinning cost, a wide variety of spinnable materials, and controllable process. It is an efficient method for preparing nanofibers, and can spin nanofibers with diameters ranging from tens to hundreds. [0003] Nanofibers prepared by electrospinning process have high specific surface area, high porosity and good ductility. At present, many polymers have been successfully prepared into nanofibers by electrospinning. [0004] However, existing studies have shown that it is very difficult to prepare pure sodium alginate nanofibers by electrospinning (see: Carbohydr Polym, 20l1, 85(1):276-279). The reason is that the molecular chain segment of sodium alginate is rigid, and its molecular chains are always ...

Claims

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Application Information

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IPC IPC(8): D01F9/04C08J3/24D01D5/00C08L5/04
CPCC08J3/24C08J2305/04D01D5/003D01F9/04
Inventor 谭业强隋坤艳张文谦夏延致吴淑贤桑震于梦婕
Owner QINGDAO UNIV