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Electrospinning of polycarbonate urethane biomaterials

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Abstract

Polycarbonate urethane (PCU) nano-fibers were fabricated via electrospinning using N,N-dimethylformamide (DMF) and tetrahydrofuran (THF) as the mixed solvent. The effect of volume ratios of DMF and THF in the mixed solvent on the fiber structures was investigated. The results show that nano-fibers with a narrow diameter distribution and a few defects were obtained when mixed solvent with the appropriate volume ratio of DMF and THF as 1:1. When the proportion of DMF was more than 75%in the mixed solvent, it was easy to form many beaded fibers. The applied voltage in the electrospinning process has a significant influence on the morphology of fibers. When the electric voltage was set between 22 and 32 kV, the average diameters of the fibers were found between 420 and 570 nm. Scanning electron microscopy (SEM) images showed that fiber diameter and structural morphology of the electrospun PCU membranes are a function of the polymer solution concentration. When the concentration of PCU solution was 6.0 wt-%, a beaded-fiber microstructure was obtained. With increasing the concentration of PCU solutions above 6.0 wt-%, beaded fiber decreased and finally disappeared. However, when the PCU concentration was over 14.0 wt-%, the average diameter of fibers became large, closed to 2 μm, because of the high solution viscosity. The average diameter of nanofibers increased linearly with increasing the volume flow rate of the PCU solution (10.0 wt-%)when the applied voltage was 24 kV. The results show that the morphology of PCU fibers could be controlled by electrospinning parameters, such as solution concentration, electric voltage and flow rate.

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Authors and Affiliations

  1. School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300072, China

    Yakai Feng, Fanru Meng, Ruofang Xiao, Haiyang Zhao & Jintang Guo

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  1. Yakai Feng
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  2. Fanru Meng
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Correspondence to Yakai Feng.

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Feng, Y., Meng, F., Xiao, R. et al. Electrospinning of polycarbonate urethane biomaterials. Front. Chem. Sci. Eng. 5, 11–18 (2011). https://doi.org/10.1007/s11705-010-1011-x

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  • DOI: https://doi.org/10.1007/s11705-010-1011-x

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