Central composite design (CCD)-Response surface methodology (RSM) of effective electrospinning parameters on PVP-B-Hf hybrid nanofibrous composites for synthesis of HfB2-based composite nanofibers

By R. Ghelich, M. R. Jahannama, H. Abdizadeh, F. S. Torknik, M. Vaezi. Composites Part B: Engineering, 2019

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Abstract Electrospinning in order to achieve the new nanofibrous composites by using inorganic precursor and in the lack of defects, like beads or bubbles and having diameter uniformity characteristic is challenging. To synthesis of HfB2, repeatability and homogeneity of raw electrospun fibers of polyvinylpyrrolidone-boron-hafnium (PVP-B-Hf) complex from PVP, H3BO3, and HfCl4 precursors are essential to further applications; for example in synthesis of HfB2. A five-level-five-factor central composite (circumscribed) design (CCD) approach-based response surface methodology (RSM) analysis was applied to statistically specify the effect of important process variables, namely initial PVP polymer concentration (6–14 wt %), applied voltage (10–22 kV), flow rate (4–16 μlit/min), nozzle-collector distance (10–18 cm), and molar ratio of boron to hafnium (2.2–5.8) on the key response process output variables such as average diameter, quality, and uniformity of the nanofibrous composites. By using this rotatable design, a total of 50 electrospinning experimental data was fitted. The significance of the factors and their interactions were verified by using the analysis of variance (ANOVA) with 95% of confidence level (p

Subfields: Automotive Engineering, Biomaterials, Electrical and Electronic Engineering

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