Next Article in Journal
The Effect of Heat Transfer and Polymer Concentration on Non-Newtonian Fluid from Pore-Scale Simulation of Rock X-ray Micro-CT
Previous Article in Journal
Spontaneous Formation of Fractal Aggregates of Au Nanoparticles in Epoxy-Siloxane Films and Their Application as Substrates for NIR Surface Enhanced Raman Spectroscopy
Article Menu
Issue 10 (October) cover image

Export Article

Open AccessArticle
Polymers 2017, 9(10), 508;

Evolution of Surface Nanopores in Pressurised Gyrospun Polymeric Microfibers

Department of Mechanical Engineering, University College London, London WC1E 7JE, UK
Author to whom correspondence should be addressed.
Received: 19 September 2017 / Revised: 2 October 2017 / Accepted: 6 October 2017 / Published: 13 October 2017
Full-Text   |   PDF [5393 KB, uploaded 17 October 2017]   |  


The selection of a solvent or solvent system and the ensuing polymer–solvent interactions are crucial factors affecting the preparation of fibers with multiple morphologies. A range of poly(methylmethacrylate) fibers were prepared by pressurised gyration using acetone, chloroform, N,N-dimethylformamide (DMF), ethyl acetate and dichloromethane as solvents. It was found that microscale fibers with surface nanopores were formed when using chloroform, ethyl acetate and dichloromethane and poreless fibers were formed when using acetone and DMF as the solvent. These observations are explained on the basis of the physical properties of the solvents and mechanisms of pore formation. The formation of porous fibers is caused by many solvent properties such as volatility, solubility parameters, vapour pressure and surface tension. Cross-sectional images show that the nanopores are only on the surface of the fibers and they were not inter-connected. Further, the results show that fibers with desired nanopores (40–400 nm) can be prepared by carefully selecting the solvent and applied pressure in the gyration process. View Full-Text
Keywords: pressure; gyration; polymer; microfibers; nanopores; surface pressure; gyration; polymer; microfibers; nanopores; surface

Graphical abstract

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

Share & Cite This Article

MDPI and ACS Style

Illangakoon, U.E.; Mahalingam, S.; Matharu, R.K.; Edirisinghe, M. Evolution of Surface Nanopores in Pressurised Gyrospun Polymeric Microfibers. Polymers 2017, 9, 508.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Related Articles

Article Metrics

Article Access Statistics



[Return to top]
Polymers EISSN 2073-4360 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top