Preparation of Polyimide Nanofiber with Antimicrobial Activity by Electrospinning†

doi:10.7503/cjcu20150821

Abstract

Abstract:

3,3',4,4'-Biphenyl tetra carboxylic diandhydride, 4,4'-oxydianiline and AgNO₃ were used to synthesis polyimide nanofiber with silver through two steps by electrospinning. The structure and morphology of nanofibers were studied by X-ray diffraction(XRD), transmission electron microscope(TEM) and scanning electron microscopy(SEM). The antimicrobial activity of polyimide(PI) and polyimide containing silver(PI/Ag) were researched through impregnation method. The results showed that silver’s crystal structure appeared in polyimide matrix, and silver particles, which average diameters were about 10 nm, dispersed uniformly on polyimide surface. The antimicrobial activities of PI/Ag nanofiber against E. coli, S. aureus and B. subtilis illustrated excellent effect and the best antibacterial rate up to 99.1%. This study may provide a new insight for polyimide applied in biomedical materials and other applications with good thermal performance and antibacterial property.

Key words: Electrospinning, Polyimide, Nanofiber, Antimicrobial activity

CLC Number:

O631

TrendMD:

ZHANG Futing, ZHOU Jinlong, HUANG Hairui, JI Zhenyan, YANG Liangjiong, FU Min, FANG Bijun, ZHANG Hongwen, JIANG Yan, YU Qiang, ZHOU Wanlin. Preparation of Polyimide Nanofiber with Antimicrobial Activity by Electrospinning^†[J]. Chem. J. Chinese Universities, 2016, 37(4): 781.

Figures/Tables 6

Fig.1 FTIR of PI(a) and PI/Ag nanofiber(b)

Fig.2 XRD patterns of PI(a) and PI/Ag nanofiber(b)

Fig.3 TEM images of PI(A) and PI/Ag nanofiber(B)

Fig.4 SEM images of PI/Ag nanofiber with different magnification

Fig.5 Antibacterial result of PI(A—C) and PI/Ag(D—F) against E. coli(A, D), S. aureus(B, E) and B. subtilis(C, F), respectively

Fig.6 Viable adhesion bacteria counts of PI and PI/Ag against E. coli, S. aureus and B. subtilis

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