茶多酚-聚乳酸/聚碳酸丁二醇酯抗菌复合纤维膜的制备及性能

通过静电纺丝法制备了茶多酚(TP)-聚乳酸(PLA)/聚碳酸丁二醇酯(PBC)复合纤维膜。并采用SEM、FTIR、TG、接触角和抑菌测试进行了表征。研究表明，TP与PLA/PBC复合纤维薄膜共混良好，并且通过接触角测试10 s后接触角从105.42°下降到69.41°，TP的加入使TP-PLA/PBC复合纤维膜的热分解稳定性提高。随着TP含量的增加，纤维直径分布逐渐均匀并且趋于减小。TP-PLA/PBC复合纤维膜的抗菌活性远高于PLA/PBC复合纤维膜，对大肠杆菌(E.coli)的抗菌活性也略高于金黄色葡萄球菌(S.aureus)。当TP的添加量(与PLA/PBC的质量比)为20%时，得到了亲水性、热稳定性和抗菌性能优异的TP-PLA/PBC复合纤维膜。 

Preparation and properties of tea polyphenol-polylactic acid/polybutylene carbonate antibacterial composite fiber membrane

Tea polyphenol (TP)-polylactic acid (PLA)/polybutylene carbonate (PBC) composite fiber membranes were successfully prepared by electrospinning. The embranes were characterized by SEM, FTIR, TG, contact angle and bacteriostatic test. The results show that the TP and PLA/PBC composite fiber films are well blended, and the contact angle of TP-PLA/PBC decreases from 105.42° to 69.41° after 10 s of wet test. The addition of TP improves the thermal decomposition stability of TP-PLA/PBC composite fiber membranes. With the increase of TP content, the fiber diameter distribution gradually becomes uniform and tends to decrease. The antimicrobial activity of TP-PLA/PBC composite fiber membranes is much higher than that of pure PLA/PBC composite fiber membranes, and the antimicrobial activity against E.coli is also slightly higher than S.aureus. When the mass ratio of TP to PLA/PBC is 20%, the TP-PLA/PBC composite fiber membrane excellent in hydrophilicity, thermal stability and antibacterial property is obtained.