以纯棉水刺无纺布为基材,乙酸为溶剂,柠檬酸为交联剂,把壳聚糖接枝在棉无纺布上,再以壳聚糖为载体,固定原卟啉,制备出一种光敏抗菌材料。借助扫描电镜和傅里叶红外光谱仪分析固定前后棉无纺布的形貌及化学结构变化,并探究改性后棉无纺布的力学性能、透气性及抗菌性能。结果表明:棉无纺布表面接枝了壳聚糖与原卟啉,其断裂强力有所减小;在暗室/光照条件下,改性无纺布对金黄色葡萄球菌和大肠杆菌均具有良好的抗菌效果,尤其在光照条件下,原卟啉与壳聚糖的协同抗菌作用,使改性无纺布对大肠杆菌的抗菌率达到99.91%。
Chitosan was grafted onto the cotton nonwoven fabric with pure cotton spunlaced nonwoven fabric as the substrate,acetic acid as the solvent,and citric acid as the crosslinking agent.Then,with chitosan as the carrier,protoporphyrin was immobilized to prepare a photosensitive antibacterial material.The morphology and chemical structure changes of the cotton nonwoven fabrics before and after immobilization were analyzed by means of scanning electron microscopy and Fourier transform infrared spectroscopy.The mechanical properties,air permeability and antibacterial properties of the modified cotton nonwoven fabrics were also investigated.The results showed that chitosan and porphyrin were successfully grafted onto the surface of the cotton nonwoven fabric,and the breaking strength of the modified cotton non-woven fabric decreased.The modified nonwoven fabric exhibited good antibacterial effects against Staphylococcus aureus and Escherichia coli under darkroom/light conditions.Especially,it presented a high antibacterial rate of 99.91% against Escherichia coli under light due to the synergistic antibacterial effect of protoporphyrin and chitosan.
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基金资助
湖北省重点研发计划项目(技术创新中心类:2020DGC003);湖北省自然科学基金项目(2021CFB478);武汉纺织大学大学生创新训练项目(X202210495006)
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