可见光激发下具有增强抑菌作用的聚乙烯醇/石墨氮化碳复合纳米纤维膜  

Fabrication and Visible-Light-Activated Bacteriostasis of Polyvinyl Alcohol/g-C_(3)N_(4) Composite Nanofiber Membranes

作　　者：刘洋[1] 拜雪梅 陈美娟 栾静敏 宋婷婷 于建香[1] Yang Liu;Xuemei Bai;Meijuan Chen;Jingmin Luan;Tingting Song;Jianxiang Yu(School of New Materials and Chemical Engineering,Beijing Institute of Petrochemical Technology,Beijing 102617,China)

机构地区：[1]北京石油化工学院新材料与化学工程学院,北京102617

出　　处：《高分子材料科学与工程》2023年第2期71-79,共9页Polymer Materials Science & Engineering

摘　　要：将聚乙烯醇(PVA)溶液与分散在其中的石墨氮化碳(g-C_(3)N_(4))纳米片通过静电纺丝技术和交联反应成功地制备了具有增强抑菌性能的可生物降解复合纳米纤维膜。对PVA/g-C_(3)N_(4)(P-CN)复合纳米纤维膜的微观形貌、物理性能及抗菌性能进行了研究,分析了g-C_(3)N_(4)含量对复合纳米纤维膜的形貌及性能的影响。扫描电镜分析结果表明,P-CN纤维直径为200~300 nm,交联后纤维直径变为1μm左右,g-C_(3)N_(4)质量分数小于3%时,纳米片均匀地分布在纳米纤维的表面,通过拉伸和溶胀测试发现,交联复合纳米纤维膜具有良好的力学性能和优良的抗溶胀性能。抑菌测试结果表明,复合纳米纤维对大肠杆菌和金黄色葡萄球菌的抗菌效果随着g-C_(3)N_(4)含量的增加明显提高,在4×10^(4)Lux的LED光激发10min后培养24 h的P-CN-5的最大抗菌环直径可以达到20 mm。研究结果表明,P-CN复合纳米纤维膜含少量g-C_(3)N_(4)就具备优异的抗菌性能,未来在抗菌涂层和包装等领域有巨大的应用潜力。The novel antimicrobial and biodegradable composite nanofiber membranes were successfully fabricated by electrospinning of polyvinyl alcohol(PVA)solution with dispersed graphitic carbon nitride(g-C_(3)N_(4))nanosheets followed with crosslinking reaction.The morphology,physical and antimicrobial properties of PVA/g-C_(3)N_(4)(P-CN)composite nanofiber membranes were systematically characterized.The effects of different g-C_(3)N_(4) concentrations on the morphology and performance of the composite nanofiber membranes were investigated.The SEM results show that the diameter of P-CN fiber is between 200~300 nm.After crosslinking,the fiber diameter becomes about 1μm.g-C_(3)N_(4) nanosheets are evenly distributed on the surface of the nanofibers with the content below 3%.At the same time,the tensile and swelling tests reveal that the cross-linked composite nanofiber membranes have good mechanical properties and excellent swelling resistance.The antibacterial test results show that the antibacterial effect of the composite nanofiber membranes on E.coli and S.aureus is significantly increased with the increase of g-C_(3)N_(4) content,the maximum antibacterial radius could reach 10 mm under the visible light excitation of 4×10^(4) Lux for 10 min in advance.P-CN-5 composite nanofiber membranes demonstrate excellent antimicrobial performance with a small amount of g-C_(3)N_(4),which should provide great potential for applications such as antimicrobial coatings and packaging.

关 键 词：聚乙烯醇 石墨相氮化碳 纳米纤维 光催化 抗菌 

分 类 号：TQ340.64[化学工程—化纤工业]