摘要
采用静电纺丝技术,分别制备了纯聚乳酸(PLA)纳米纤维膜和不同TiO2含量的TiO2/PLA复合纳米纤维膜。利用扫描电子显微镜、傅里叶红外光谱和电子万能试验机分别对复合纳米纤维膜进行了形貌表征、成分分析和力学性能测试,用改良的振荡烧瓶法测试了复合纳米膜的抗菌性能。结果表明:随TiO2含量的增加,纤维直径减小而CV值和表面颗粒尺寸有所增加;复合纳米纤维膜中含有TiO2成分,证明TiO2与聚乳酸能够物理复合;添加适量的TiO2能够提高纳米纤维膜的断裂强度;在光催化条件下,TiO2/PLA复合纳米纤维膜对大肠杆菌和金黄色葡萄球菌表现出良好的抗菌性能,当TiO2含量为1%时,对两种菌的抑菌率分别达到92.9%和92.2%。
Poly(lactic acid)(PLA)nanofiber films and TiO2 /PLA composite nanofiber films with different contents of TiO2 were prepared by electrospinning technology.The morphology characteration,component analysis and mechanical property of composite nanofiber films were tested by SEM,FT-IR and electronic universal testing machine respectively.Meanwhile,the antibacterial performance of composite nanofiber films were tested by the modified oscillation flask method.The result shows that with the increase of TiO2 content,the fiber diameter decreases,but the value of CV and the particle size increase.The presence of TiO2 in the composite nanofiber films proves that TiO2 and PLA can combine physically.The breaking strength of nanofiber films can be improved by adding appropriate amount of TiO2.The TiO2 /PLA composite nanofiber films present a good antibacterial property against Escherichia coil and Staphylococcus aureus under the condition of photocatalysis,the antibacterial rate to Escherichia coil and Staphylococcus aureus reach 92.9% and 92.2%respectively when the content of TiO2 is 1%.
出处
《材料科学与工程学报》
CAS
CSCD
北大核心
2014年第1期70-73,69,共5页
Journal of Materials Science and Engineering
基金
教育部长江学者和创新团队发展计划资助项目(IRT1135)
国家自然科学基金青年基金资助项目(31201134
51203066)
