Preparation,characterization of antibacterial PLA/TP nanofibers |
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Authors: | Yanna Fei Yan Chen Hongbo Wang Weidong Gao Ruihua Yang Yuqin Wan |
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Institution: | (1) Division of Chemical Engineering, Hankyong National University, 167, Chungang-ro, Gyeonggi-do, Anseong-si, 456-749, Korea; |
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Abstract: | Polylactic acid (PLA)/Tea polyphenol (TP) composite nanofilms were prepared using an electrospinning process. The mixed dichloromethane
(DCM) and N,N-dinethylformamide (DMF) (70:30, v/v) was found to be the most suitable solvent for electrospinning. Various blends of PLA/TP
solutions were formed. The morphology of the electrospun nano-scale fibers was investigated by scanning electron microscope
(SEM), and the antibacterial performance was tested using shake flask method. The average diameter of the fibers is between
380 and 850 nm. It was found that the fiber diameter decreases as TP content increases, however the fibers may become brittle
when the blend ratio of PLA and TP reached 50/50 (w/w). The antibacterial performance can be improved at the beginning when
TP content increased. But it gradually gets impaired when TP content surpasses a certain value. The highest inhibitory rate
against Escherichia coli and Staphylococcus aureus are 96.9 and 97.6 % respectively. |
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Keywords: | |
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