Three-dimensional electrospun micropatterned cellulose acetate nanofiber surfaces with tunable wettability
Journal of Applied Polymer Science
© 2017 Wiley Periodicals, Inc.
Reason for embargo
Three-dimensional polymer nanofibrous mats with tunable wettability have been fabricated using a single step non-conductive template assisted electrospinning process. Cellulose acetate nanofibers are electrospun over a nylon mesh, which acts as thetemplate. The as-deposited fiber mat is removed from this template to produce a free standing three-dimensional micropatterned nanofi-brous mat. By simply varying the template mesh dimensions, the fraction of the air-liquid interface can be changed which allows controlof the wetting mechanics. It is shown that the water contact angle can be varied from about 308 for a planar network to about 1408 for apatterned mat implying a complete transition from hydrophilic to hydrophobic behavior. Furthermore, upon stretching the fiber matloses its pattern irreversibly and reducing the contact angle from 1408 to 1108 with increasing stretching.
Support of a DST-UKIERI grant is gratefully acknowl-edged. M.K. and C.S.S. acknowledge the Indian Institute of Tech-nology Hyderabad, for providing necessary research infrastructureto carry out this wor
This is the author accepted manuscript. The final version is available from the publisher via the DOI in this record.
Vol. 134: 44709. DOI: 10.1002/app.44709