Highly sticky surfaces made by electrospun polymer nanofibers

RSC Advances
S VaragnoloDario Pisignano

Abstract

We report on a comprehensive study of the unique adhesive properties of mats of polymethylmethacrylate (PMMA) nanofibers produced by electrospinning. Fibers are deposited on glass, with varying of the diameter and the relative orientation of the polymer filaments (random vs. aligned configuration). While no significant variation is observed in the static contact angle (∼130°) of deposited water drops upon changing the average fiber diameter up to the micrometer scale, fibers are found to exhibit unequalled water adhesion. Placed vertically, they can hold up water drops as large as 60 μL, more than twice the values typically obtained with hairy surfaces prepared by different methods. For aligned fibers with anisotropic wetting behavior, the maximum volume measured in the direction perpendicular to the fibers goes up to 90 μL. This work suggests new routes to tailor the wetting behavior on extended areas by nanofiber coatings, with possible applications in adsorbing and catalytic surfaces, microfluidic devices, and filtration technologies.

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Citations

Feb 6, 2020·Journal of Materials Chemistry. B, Materials for Biology and Medicine·Juanrong QinBotao Song
Apr 10, 2019·Polymers·Piotr K SzewczykUrszula Stachewicz
Apr 5, 2018·ACS Applied Materials & Interfaces·William S Y Wong, Antonio Tricoli
May 16, 2020·Langmuir : the ACS Journal of Surfaces and Colloids·Mohammad Jamali, Hooman Vahedi Tafreshi
Sep 19, 2018·Langmuir : the ACS Journal of Surfaces and Colloids·M JamaliB Pourdeyhimi

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Methods Mentioned

BETA
atomic
scanning electron microscopy
AFM

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