Loading...

High flux electrospun nanofiberous membrane: Preparation by statistical approach, characterization, and microfiltration assessment

Seyed Shahabadi, S. M ; Sharif University of Technology

629 Viewed
  1. Type of Document: Article
  2. DOI: 10.1016/j.jtice.2015.07.033
  3. Publisher: Taiwan Institute of Chemical Engineers
  4. Abstract:
  5. Preparation, characterization and evaluation of new generation of micro-filters based on polyacrylonitrile electrospun nanofiberous membrane (ENM) were thoroughly investigated. First, quantitative relationships between average diameter, bead area density of nano-fibers and certain electrospinning parameters, i.e., concentration, voltage, spinning distance, and feed rate, were established by empirical modeling based on a central composite design. The analysis revealed that concentration, voltage and distance are the significant parameters. Also, adequacy checking indicated the appropriateness of fit for the models. Afterwards, bead-free ENMs with diameter of 100-500 nm were prepared and characterized in terms of porosity, pore size and mechanical properties. The results indicate that as the nano-fiber diameter increases from 100 nm to 500 nm, porosity decreases from 74% to 61%, pore radius increases from 0.48 μm to 1.40 μm and tensile properties slightly decrease. Moreover, pure water flux increased with increasing nano-fiber diameter and membrane compaction was observed with increasing applied pressure for each membrane. Finally, ENM with fiber diameter of 100 nm showed the highest rejection rate of 99% and steady permeate flux of 118 l/m2h using TiO2 micro-particles suspension. Such finding demonstrates that ENMs with proper fiber diameter and morphology are excellent choices for high flux microfiltration applications
  6. Keywords:
  7. Bead area density ; Electrospinning ; Fibers ; Membranes ; Microfiltration ; Nanofibers ; Pore size ; Porosity ; Suspensions (fluids) ; Area density ; Average fiber diameters ; Central composite designs ; Electrospinning parameters ; Membrane compaction ; Response surface methodology ; Spinning distance ; Statistical approach ; Spinning (fibers)
  8. Source: Journal of the Taiwan Institute of Chemical Engineers ; Volume 59 , 2016 , Pages 474-483 ; 18761070 (ISSN)
  9. URL: http://www.sciencedirect.com/science/article/pii/S1876107015003703