Fabrication and characterization of carbon nanofibers with a multiple tubular porous structure via electrospinning

The carbon-nanofibers carrying Ag nanoparticles (Ag/CNF) have been successfully obtained via electrospinning followed by calcination. For it, AgNO3/polyacrylonitrile (PAN) fibers were firstly prepared as an intermediate and then the intermediate was calcined at 600°C for 4h to transit the PAN nanofibers to the CNF and reduce AgNO3 to the Ag nanoparticles. Transmission electron microscope (TEM), Fourier transform infrared (FTIR) spectroscopy and X-ray diffraction (XRD) were used to characterize their morphologies and structures. The results show that the diameters of the Ag nanoparticles and CNF are 5 nm and 180 nm on the average, respectively. Most of the Ag nanoparticles were located on the surface of carbon nanofibers.

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Design, fabrication and characterization of tailored poly[(R)-3-hydroxybutyrate-co-(R)-3-hydroxyexanoate] scaffolds by computer-aided wet-spinning

Rapid Prototyping Journal ◽

10.1108/rpj-03-2016-0037 ◽

2018 ◽

Vol 24 (1) ◽

pp. 1-8 ◽

Cited By ~ 9

Author(s):

Dario Puppi ◽

Alessandro Pirosa ◽

Andrea Morelli ◽

Federica Chiellini

Keyword(s):

Porous Structure ◽

Chemical Characterization ◽

Wet Spinning ◽

Content Type ◽

Compressive Stiffness ◽

Porous Architecture ◽

Computer Aided ◽

Fabrication And Characterization

Purpose The purpose of this paper is to describe the fabrication and characterization of poly[(R)-3-hydroxybutyrate-co-(R)-3-hydroxyexanoate] (PHBHHx) tissue engineering scaffolds with anatomical shape and customized porous structure. Design/methodology/approach Scaffolds with external shape and size modeled on a critical size segment of a rabbit’s radius model and an internal macrochanneled porous structure were designed and fabricated by means of a computer-aided wet-spinning (CAWS) technique. Morphological, thermal and mechanical characterization were carried out to assess the effect of the fabrication process on material properties and the potential of the PHBHHx scaffolds in comparison with anatomical star poly(e-caprolactone) (*PCL) scaffolds previously validated in vivo. Findings The CAWS technique is well suited for the layered manufacturing of anatomical PHBHHx scaffolds with a tailored porous architecture characterized by a longitudinal macrochannel. Morphological analysis showed that the scaffolds were composed by overlapping layers of microfibers with a spongy morphology, forming a 3D interconnected network of pores. Physical-chemical characterization indicated that the used technique did not affect the molecular structure of the processed polymer. Analysis of the compressive and tensile mechanical properties of the scaffolds highlighted the anisotropic behavior of the porous structure and the effect of the macrochannel in enhancing scaffold compressive stiffness. In comparison to the *PCL scaffolds, PHBHHx scaffolds showed higher compressive stiffness and tensile deformability. Originality/value This study shows the possibility of using renewable microbial polyester for the fabrication of scaffolds with anatomical shape and internal architecture tailored for in vivo bone regeneration studies.

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Fabrication and Characterization of Polyoxometalate based Nano-hybrids: Evaluation of their role in Biological Activity

JOURNAL OF POLYMER MATERIALS ◽

10.32381/jpm.2018.35.04.6 ◽

2019 ◽

Vol 35 (4) ◽

pp. 475-484

Author(s):

SHIVA ARUN ◽

◽

PRABHA BHARTIYA ◽

AMREEN NAZ ◽

SUDHEER RAI ◽

...

Keyword(s):

Biological Activity ◽

Fabrication And Characterization

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