期刊
APPLIED SURFACE SCIENCE
卷 369, 期 -, 页码 492-500出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.apsusc.2016.02.053
关键词
Composite nanofiber; Iron oxide nanoparticles; Chitosan; Mechanical property; Antibacterial property
类别
资金
- National Natural Science Foundation of China [21571147, 21206143]
- Natural Science Foundation of Hubei Province [2015CFB430]
- Innovative Team Incubation Program in High-Tech Industry of Wuhan City [2014070504020244]
- Innovative Team Program of the Natural Science Foundation of Hubei Province [2014CFA011]
- Hubei Collaborative Innovation Center for Down-Streaming Products in Ethylene Project and Process Intensification
- Key Laboratory of Green Chemical Process (Wuhan Institute of Technology), Ministry of Education [GCP201508]
- Hubei Key Laboratory of Novel Reactor and Green Chemical Technology (Wuhan Institute of Technology) [NRGCT201508]
- Graduate Innovative Fund of Wuhan Institute of Technology
In this work, magnetic Fe3O4 nanoparticles (NPs) were utilized to improve the mechanical and antibacterial properties of chitosan (CS)/gelatin (GE) composite nanofiber membranes. Homogeneous Fe3O4/CS/GE nanofibers were electrospun successfully. Scanning electron microscopy (SEM) and transmission electron microscopy (TEM) images confirmed the presence of well-dispersed Fe3O4 NPs in the composite nanofibers. Fourier transform infrared spectroscopy (FTIR) spectra revealed the effective interactions of Fe3O4 NPs to the composite matrix through hydrogen bonding. The improvement on the thermal stability of the Fe3O4/CS/GE was observed by differential scanning calorimetry (DSC) and thermo gravimetric analysis (TGA), which is tightly correlated to strong filler-matrix adhesion. The incorporation of Fe3O4 NPs resulted in a substantial enhancement of mechanical properties. The optimum mechanical performance was demonstrated on 1 wt% Fe3O4/CS/GE nanofiber membranes, achieving 155% augment of Young's modulus, 128% increase of tensile strength, and 100% boost of toughness from CS/GE. The excellent mechanical enhancement can be explained by the effective dispersion of fillers and the filler matrix interactions, which ensures the efficient load transfer from CS/GE matrix to Fe3O4 nanofillers. Moreover, zones of inhibition for Escherichia coli and Staphylococcus aureus expanded markedly with the supplement of Fe3O4 NPs. In all, nanofiber membranes made of Fe3O4/CS/GE composite with tailored mechanical and antibacterial properties appear a promising wound dressing material. (C) 2016 Elsevier B.V. All rights reserved.
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