Hydrophobic Antifouling Electrospun Mats from Zwitterionic Amphiphilic Copolymers


Ozcan S., Kaner P., Thomas D., Cebe P., Asatekin A.

ACS APPLIED MATERIALS & INTERFACES, cilt.10, sa.21, ss.18300-18309, 2018 (SCI İndekslerine Giren Dergi) identifier identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 10 Konu: 21
  • Basım Tarihi: 2018
  • Doi Numarası: 10.1021/acsami.8b03268
  • Dergi Adı: ACS APPLIED MATERIALS & INTERFACES
  • Sayfa Sayıları: ss.18300-18309

Özet

A porous material that is both hydrophobic and fouling-resistant is needed in many applications, such as water purification by membrane distillation. In this work, we take a novel approach to fabricating such membranes. Using the zwitterionic amphiphilic copolymer poly(trifluoroethyl methacrylate-random-sulfobetaine methacrylate), we electrospin nonwoven, porous membranes that combine high hydrophobicity with resistance to protein adsorption. By changing the electrospinning parameters and the solution composition, membranes can be prepared with a wide range of fiber morphologies including beaded, bead-free, wrinkly, and ribbonlike fibers, with diameters ranging between similar to 150 nm and 1.5 mu m. The addition of LiCl to the spinning solution not only helps control the fiber morphology but also increases the segregation of zwitterionic groups on the membrane surface. The resultant electrospun membranes are highly porous and very hydrophobic, yet resist the adsorption of proteins and retain a high contact angle (similar to 140 degrees) even after exposure to a protein solution. This makes these materials promising candidates for the membrane distillation of contaminated wastewater streams and as self-cleaning materials.