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Issue 53, 2014
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Theoretical selection of solvent for production of electrospun PMMA fibers with wrinkled surfaces

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Abstract

A Bagley graph is a 2D solubility chart that contains the Hansen solubility parameters of polymers and solvents to provide a systematic and theoretical method for selecting solvents during electrospinning. The interaction radius of the solubility circle of poly methyl methacrylate (PMMA) is 8.59 MPa0.5. In the Bagley graph of PMMA, ethanol is located outside of the solubility circle and is therefore a non-solvent for PMMA. In the current study, ethyl acetate (EA) was chosen as the solvent for electrospinning PMMA to investigate the effects of variations in the applied voltage and solution concentration on spinnability and fiber morphologies. Statistical analysis showed that varying the applied voltage (14–20 kV) and solution concentration (6–8%) does not produce a significant difference in average fiber diameter. The surface of the PMMA fiber was irregularly wrinkled due to spinodal decomposition from thermal induced phase separation. Software developed with the Delphi 7.0 programming language was used to predict the liquid–liquid phase separation of mixing systems. Conclusively, the wrinkling was caused by the thermodynamic instability of the polymer solution undergoing rapid volatilization of EA.

Graphical abstract: Theoretical selection of solvent for production of electrospun PMMA fibers with wrinkled surfaces

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Publication details

The article was received on 22 Apr 2014, accepted on 13 Jun 2014 and first published on 13 Jun 2014


Article type: Paper
DOI: 10.1039/C4RA03657C
RSC Adv., 2014,4, 27914-27921

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    Theoretical selection of solvent for production of electrospun PMMA fibers with wrinkled surfaces

    L. Li, R. Li, M. Li, Z. Rong and T. Fang, RSC Adv., 2014, 4, 27914
    DOI: 10.1039/C4RA03657C

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