不同金属离子交联海藻酸盐复合纤维性能比较

Performance comparison of different metal ionscross-linked Alg composite fibers

为了促进海藻酸(Alg)材料在纺织领域的应用,以海藻酸钠为纺丝液,以氯化钙(CaCl_(2))、氯化锌(ZnCl_(2))、氯化铜(CuCl_(2))和氯化锶(SrCl_(2))溶液为凝固浴,采用湿法纺丝工艺,制备了不同金属离子交联的海藻酸盐纤维。通过扫描电子显微镜、红外光谱、X-射线衍射等表征手段分析了海藻酸与不同金属离子的螯合作用,海藻酸盐纤维的微观形貌以及应用性能。结果表明:与CaCl_(2)相比,经过ZnCl_(2)、CuCl_(2)和SrCl_(2)凝固浴交联的海藻酸盐纤维具有更好的吸湿和阻燃性,其中海藻酸锌纤维的吸湿率达到290%,氧指数35;海藻酸锶纤维具有最高的断裂强度,达到(48±1.2)MPa;由于铜离子和锌离子自身具有抗菌特性,制备的海藻酸铜和海藻酸锌纤维具有优良的抗菌特性。

To promote the application of alginate(Alg)materials in textile applications,using sodium alginate as spinning solution,calcium chloride(CaCl_(2)),zinc chloride(ZnCl_(2)),copper chloride(CuCl_(2))and strontium chloride(SrCl_(2))solutions as coagulation baths,alginate fibers cross-linked with different metal ions were prepared by wet spinning process.The chelation between alginate and different metal ions,as well as the microstructure and application performance of alginate fibers were analyzed through characterization methods such as scanning electron microscopy,infrared spectroscopy,and X-ray diffraction.The results show that compared with CaCl_(2),alginate fibers cross-linked by ZnCl_(2),CuCl_(2),and SrCl_(2)coagulation baths have better moisture absorption and flame retardancy,with zinc alginate fibers having a moisture absorption rate of 290%and an oxygen index of 35;Strontium alginate fibers have the highest breaking strength of(48±1.2)MPa;The prepared copper and zinc alginate fibers have excellent antibacterial properties because of the copper and zinc ions’antibacterial properties.