紫外光辐照引发接枝制备卤胺抗菌棉织物

Preparation of N-halamine treated antibacterial cotton fabric via UV irradiation

以安息香双甲醚(DMPA)为光引发剂,通过紫外光辐照引发卤胺前驱体3-(4’-乙烯基苄基)-5,5-二甲基海因(VBDMH)在棉织物表面接枝,氯化后得到卤胺抗菌棉织物。探讨了VBDMH浓度、辐照时间、辐照距离对织物氯含量的影响,得到最佳整理工艺:VBDMH质量浓度为30 g/L,辐照距离为20 cm,辐照时间为30 min。红外光谱分析和扫描电镜形貌分析表明:VBDMH已经成功接枝到织物上。制备的抗菌棉织物在10 min内灭活对数值为6.62的金黄色葡萄球菌和6.55的大肠杆菌,且抗菌性能可再生。

The N-halamine precursor 3-(4’-vinylbenzyl)-5, 5-dimethylhydantoin(VBDMH) was grafted onto the cotton fabric via UV irradiation using benzoin dimethyl ether(DMPA) as photoinitiator. Subsequently, Nhalamine antibacterial cotton fabric was obtained after sodium hypochlorite chlorination. The effects of VBDMH concentration, irradiation time, and irradiation distance on chlorine mass fraction of the grafted cotton fabric were investigated. The optimum finishing processing was obtained as follows: VBDMH concentration was 30 g/L,irradiation time and distance was 20 cm and 30 min, respectively. The antibacterial fabrics were characterized by scanning electron microscopy and Fourier transform infrared spectroscopy. The results showed that VBDMH was successfully grafted onto the fabric. The antibacterial fabric could inactive 6.62 log of S. aureus and 6.55 log of E.coli within 10 min, and its antibacterial property can be regenerated.