Preparation And Properties Of Antibacterial Alginate Fibers

At present, people pay more attention on natural polysaccharides owing to fossilresource exhausted and non-degradable synthetic material harm to environment andhuman body. Alginate fiber is prepared by sodium alginate which extracted fromseaweed, alginate fiber has the advantages of good biological compatibility, rich inresources, biodegradable and suction fluid volume, it is widely used in medicaldressings and clothing fibers. Because the alginate fiber with no antibacterialperformance, it limit the scope of application. Chitosan is a natural polysaccharide,and has good antibacterial property; Nano silver is a broad-spectrum antibacterialagent and antibacterial effect is excellent. This paper will modified the alginate fiberby chitosan and nano silver and extend its applicable field.The preparation processes of silver-containing alginate fiber: the density ofspinning liquid is5%, the nano-sliver content is between0.1%to1.2%, theconcentration of calcium chloride in coagulation bath is4%, the temperature ofcoagulation bath is25℃. single-fiber breaking strength is1.13cN/dtex, Thewater absorption of silver-containing alginate fiber reached9.17g/g, thebacteriostatic rates reach90%, After one year, it had good anti-bacterial property.The best preparation processes of finishing the alginate fiber by chitosan:concentration of Sodium Hydroxide is1.5g/L, the treatment time of SodiumHydroxide is30s, The concentration of chitosan is0.5%, the treatment time ofchitosan is20min，when the concentration of chitosan is0.5%, the bacteriostatic ratesreach85%, the water absorption reached16.83g/g, the breaking strength is3.41cN.The best dyeing process of the alginate fiber which finishing by chitosan wasthat: the concentration of reactive dyes was2%(owf), dye temperature was90℃, dyetime was50min, bath ratio was1:50. The dye update up to85%, half dyeing time was6.26min; leveling property was preferably.