Preparation method of nano-silver alginate fiber

A technology of seaweed fiber and nano-silver, applied in the chemical characteristics of fiber, preparation of spinning solution, wet spinning method, etc., can solve the problems of aggregation, indurability, and unresolved, achieve uniform particle size distribution, improve nano-effect, long-lasting The effect of antibacterial properties

Active Publication Date: 2013-06-12
QINGDAO UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the surface energy of nano-silver is very large, it is easy to aggregate, and it is easy to block the spinneret holes during the spinning process, making continuous production difficult.
Chinese patent CN200710014403.1 discloses the preparation method of ordinary and functional calcium alginate fibers, and proposes adding antibacterial nanopowder and chitosan microcapsules to sodium alginate solution to prepare functional calcium alginate fibers. The nanopowder is Titanium dioxide silver-carrying powder, but the preparation method of titanium dioxide silver-carrying powder and the particle size of nano-powder are not disclosed, and how to solve the problem of aggregation caused by the mixing of various nano-powders and continuous spinning cannot be proposed
However, the preparation method of nano-silver paste, the particle size of nano-silver and its antibacterial effect are not disclosed. What is important is that this technology is only a surface treatment technology. Because it is not durable, it is limited to non-woven medical accessories.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] The silver ammonia solution with a concentration of 0.1mol / L and the sodium alginate aqueous solution with a mass percent concentration of 1.5% were mixed at a volume ratio of 1:90 to obtain a nano-silver precursor-silver alginate complex solution. Then add glucose which is equimolar to the metal ions in the complex to the silver alginate complex solution, and react at 48° C. for 40 minutes under stirring conditions to prepare a sodium alginate-based nano-silver colloidal system. Then add fiber-grade sodium alginate (molecular weight 300,000 to 600,000, M / G value 0.5 to 1.5) to the sodium alginate-based nano-silver colloid system until the mass percentage concentration of sodium alginate is 4.9%, and stir at 50°C After reacting for 2 hours, the nano-silver seaweed spinning solution was prepared. The nano-silver seaweed spinning solution is left to mature, filtered, degassed under reduced pressure, wet-spun, and passed through a coagulation bath to obtain nano-silver sea...

Embodiment 2

[0033]The silver ammonia solution with a concentration of 2.5 mol / L and the sodium alginate aqueous solution with a mass percent concentration of 3.5% were mixed at a volume ratio of 1:85 to obtain a nano-silver precursor-silver alginate complex solution. Then add glyoxylic acid which is equimolar to the metal ions in the complex solution to the silver alginate complex solution, and react at 40° C. for 55 minutes under stirring conditions to prepare a sodium alginate-based nano-silver colloidal system. Then add fiber-grade sodium alginate (molecular weight 300,000 to 600,000, M / G value 0.5 to 1.5) to the sodium alginate-based nano-silver colloid system until the mass percentage concentration of sodium alginate is 4.7%, and stir at 45°C After reacting for 1 h, the nano-silver seaweed spinning solution was prepared. The nano-silver seaweed spinning solution is left to mature, filtered, degassed under reduced pressure, wet-spun, and passed through a coagulation bath to obtain nan...

Embodiment 3

[0035] Mix the silver ammonia solution with a concentration of 0.8mol / L and the sodium alginate aqueous solution with a mass percent concentration of 2% at a volume ratio of 1:85 to obtain a nano-silver precursor-silver alginate complex solution. Then add sodium hypophosphite which is equimolar to the metal ions in the complex to the silver alginate complex solution, and react at 40° C. for 55 minutes under stirring conditions to obtain a sodium alginate-based nano-silver colloidal system. Then add fiber-grade sodium alginate to the sodium alginate-based nano-silver colloid system until the mass percentage concentration of sodium alginate is 4%, and react at 40°C for 2.5 hours under stirring conditions to prepare nano-silver seaweed spinning solution. The nano-silver seaweed spinning solution is left to mature, filtered, degassed under reduced pressure, wet-spun, and passed through a coagulation bath to obtain nano-silver seaweed primary fibers. The spinning temperature is 30°...

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Abstract

The invention discloses a preparation method of a nano-silver alginate fiber. The preparation method comprises the following steps of: preparing an alginic acid silver complex which is a precursor of nano-silver by using algal polysaccharides and soluble silver salts, and then preparing a sodium alginate based nano-silver colloid system through a chemical reduction method; then adding fiber-grade sodium alginate into the sodium alginate based nano-silver colloid system to obtain a nano-silver algae spinning solution; and finally, obtaining a nano-silver algae primary fiber through wet spinning, and carrying out stretching, sizing, drying and oiling treatments to obtain the nano-silver alginate fiber. The prepared nano-silver alginate fiber integrates the excellent performances of the nano-silver and the alginate fiber, so that the novel fiber has excellent flame retardance, biocompatibility, moisture absorption permeability and the like, also has excellent antimicrobial performance, antistatic performance and irradiation resistance and can be widely used in medical treatment, the fire-fighting field, the military field, the aerospace field, the health textile field and the like.

Description

technical field [0001] The invention relates to a preparation method of nano-silver seaweed fiber, which belongs to the technical field of production of regenerated seaweed functional fiber. Background technique [0002] Fires caused by textiles account for about 40% of the number of fires, resulting in huge casualties and economic losses. At the same time, fibers and textiles are good hosts for bacteria, which not only produce unpleasant odors and tingling sensations, but also spread diseases and cause cross-infection through contact. Seaweed fiber is a new type of renewable fiber developed from the polysaccharide-sodium alginate extracted from brown algae. It has the advantages of resource regeneration, product biocompatibility, and bulk flame retardancy, but its antibacterial performance is limited. application field. How to improve its antibacterial properties and develop new flame-retardant and antibacterial multifunctional fibers is a hot topic in the differential re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F9/04D01F1/10D01D1/02D01D5/06
Inventor 夏延致赵昔慧李群
Owner QINGDAO UNIV
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