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
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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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