为改善对位芳纶纤维的抗菌性能,合成了含芳酰胺基团的三氮唑类配体(BcT)及其银络合物(BcT-S)抗菌剂,并通过后整理法采用水溶液浸渍的方式将BcT-S负载到对位芳纶纤维表面,制备了对位芳纶抗菌纤维。通过傅里叶变换红外光谱仪、扫描电子显微镜、X射线光电子能谱仪、万能试验机等对负载前后2种纤维的化学结构、表面形貌、元素分布、力学性能和抗菌性能进行分析。结果表明:对位芳纶抗菌纤维表面均匀分布着银元素,即BcT-S已负载到纤维表面。对位芳纶抗菌纤维保持良好的力学性能,与对位芳纶无油纤维相比,线密度和模量略有提升,分别可达1127dtex和89GPa,断裂强度的变异系数由1.30%降至0.73%。对位芳纶抗菌纤维具有优异的抗菌性能,对大肠杆菌和金黄色葡萄球菌的抑菌率均达到99.99%,经过50次洗涤抑菌率仍保持在99.99%,经抗菌耐久性测试后抑菌率仍超过99.70%。

In order to improve the antibacterial properties of para-aramid fibers,triazole ligands (BcT) containing aromatic amide groups and their silver complex antibacterial agents (BcT-S) were synthesized,and BcT-S was loaded onto the surface of para-aramid fibers by aqueous solution impregnation through post-finishing method to prepare para-aramid antibacterial fibers.The chemical structure,surface morphology,elemental distribution,mechanical properties,and antibacterial properties of the two types of fibers before and after loading were analyzed using Fourier transform infrared spectrometer,scanning electron microscope,X-ray photoelectron spectrometer,universal testing machine,and other instruments.The results showed that silver elements were evenly distributed on the surface of para-aramid antibacterial fibers,confirming that BcT-S was successfully loaded onto the fiber surface.Para-aramid antibacterial fiber maintained good mechanical properties.Compared with para-aramid oil-free fiber,the linear density and modulus were slightly improved,reaching 1127dtex and 89GPa,respectively,and the coefficient of variation of breaking strength was reduced from 1.30% to 0.73%.Para-aramid antibacterial fibers exhibited excellent antibacterial properties,with an inhibition rate of 99.99% against Escherichia coli and Staphylococcus aureus.After 50 washes,the antibacterial rate remained at 99.99%,and after the antibacterial durability test,the antibacterial rate was still over 99.70%.