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Electrostatic spinning continuous production method for sodium alginate nano fibers

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

Active Publication Date: 2016-12-21
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 continuous production method for sodium alginate nano fibers

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] The production method comprises the following steps:

[0057] The first step, raw material preparation

[0058] In parts by mass, 4 parts of anhydrous sodium sulfate, 1 part of glutaraldehyde, and 6 parts of sodium alginate were respectively taken;

[0059] Dissolve the obtained anhydrous sodium sulfate in water to prepare a saturated solution, add the obtained glutaraldehyde into the saturated sodium sulfate solution, adjust the pH value to 1-2, and prepare a coagulation bath for later use;

[0060] The second step, the preparation of spinning solution

[0061] (1), dissolving the sodium alginate taken in deionized water, and preparing a sodium alginate solution with a mass percent concentration of 6%;

[0062] 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 obtained; The temperature of the system is controlled at 40°C;

[0063] (...

Embodiment 2

[0077] In addition to "the first step, raw material preparation: take 5 parts of anhydrous sodium sulfate, 5 parts of glutaraldehyde, and 12 parts of sodium alginate respectively in parts by mass;

[0078] All the other are the same as in Example 1.

[0079] After testing, the diameter of the prepared sodium alginate nanofibers is: 145nm±20nm.

Embodiment 3

[0081] In addition to "the first step, raw material preparation: according to the number of parts by mass, take 4.5 parts of anhydrous sodium sulfate, 3 parts of glutaraldehyde, and 10 parts of sodium alginate

[0082] Except; All the other are with embodiment 1.

[0083] After testing, the diameter of the prepared sodium alginate nanofibers is: 125nm±10nm.

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Abstract

The invention discloses an electrostatic spinning continuous production method for sodium alginate nano fibers. On the basis of the prior art, sodium alginate is subjected to chemical crosslinking with glutaraldehyde as a chemical crosslinker; and the crosslinked sodium alginate gel is dried in a manner of combination of liquid nitrogen quick freezing and freeze drying, thereby controlling the direction of a reversible reaction and enhancing crosslinking effects furthermore, and further solving a series of problems of low crosslinking degree of molecular chain, instability, poor spinnability, and poor uniformity of internal micron structures in the spin-molded fibers in the prior art; what is more, viscosity of a spinning liquid, which is an important spinnability index, is controlled to be within a narrow ideal range, thus ensuring continuity of the production process. The method is continuous and stable in process, is simple in process control, can ensure uniform thickness of fibers, and can ensure product quality and good stability.

Description

technical field [0001] The invention relates to a production method of sodium alginate nanofibers, in particular to an electrospinning continuous production 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 molecu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F9/04D01F1/10D01D5/00D01D1/02
CPCD01D1/02D01D5/003D01F1/10D01F9/04
Inventor 谭业强隋坤艳吴淑贤夏延致于梦婕张庆旭张文谦
Owner QINGDAO UNIV