新型海藻酸盐复合纳米银抗菌共混纤维的制备

Preparation of Novel Alginate Antibacterial Blend Fibers Containing Silver Nanoparticles

通过溶液纺丝法制备了海藻酸盐/羧丁酰壳聚糖共混纤维,通过红外光谱、X射线衍射和光学显微镜对共混纤维进行表征.结果表明:共混体系中两种组分之间存在较强的相互作用,且有良好的相容性.当羧丁酰壳聚糖的含量为30%时,共混纤维的干态抗张强度达到最大值(14.32 cN/tex),共混纤维的湿态抗张强度随着羧丁酰壳聚糖含量的增加而降低.当羧丁酰壳聚糖的含量为30%时,纤维的干、湿态断裂伸长率分别达到最大值43.5%和69.3%.随着羧丁酰壳聚糖的引入,纤维的吸水率显著提高.将纳米银分散液加入纺丝液中可以得到抗菌性能优异的海藻酸盐复合纤维.

Alginate/succinyl-chitosan （SCS） blend fibers were prepared by spinning their mixture solution through a viscose-type spinneret into a coagulating bath containing aqueous CaCl2. The structure and properties of the blend fibers were studied with the aids of infrared spectra （IR）, X-ray diffraction （XRD） and optical microscopy. The results indicate good miscibility between alginate and succinyl-ehitosan because of the strong interaction. The best values of the dry tensile strength （43.5%） and breaking elongation （14.32 cN/tex） were obtained when SCS content was 30%. The wet tensile strength decreased with the increase of SCS content, and the wet breaking elongation achieved maximum value （69.3%） when the SCS content was 30%. The introduction of SCS in the blend fibers can improve the water-retention properties of blend fibers compared to pure alginate fiber. The antibacterial fibers with good antibacterial activity to staphylococcus aureus were obtained by the addition of silver nanopartieles.