Superhydrophobic behavior of polyimide-siloxane mats produced by electrospinning

OKTAY B., Toker R. D., KAYAMAN APOHAN N.

POLYMER BULLETIN, vol.72, no.11, pp.2831-2842, 2015 (SCI-Expanded) identifier

  • Publication Type: Article / Article
  • Volume: 72 Issue: 11
  • Publication Date: 2015
  • Doi Number: 10.1007/s00289-015-1438-9
  • Journal Name: POLYMER BULLETIN
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.2831-2842
  • Keywords: Fabrics/textiles, Smart materials, Nano-structures, Surface properties, STRUCTURE-PROPERTY BEHAVIOR, BLOCK-COPOLYMERS, FABRICS
  • Marmara University Affiliated: Yes

Abstract

In this study, a series of novel superhydrophobic polyimide-siloxane electrospun mats was prepared using an electrospinning process. Segmented polyimide-siloxane copolymers were prepared using 4,4'-oxydianiline (ODA) and 3,3',4,4'-benzophenone tetracarboxylic dianhydride (BTDA) as hard segments and aminopropyl terminated polydimethylsiloxane (APPS) and BTDA as soft segment. The polyimide-siloxane copolymers were synthesized by varying the APPS loading (10 and 20 mol%) and also the molecular weight of APPS (1000 and 2500 g/mol), respectively. Electrospinning of the polyamic acids was followed by thermal imidization to construct the electrospun polyimide-siloxane mats. The electrospun mats were characterized by FTIR, scanning electron microcopy (SEM), thermogravimetric analysis (TGA), differential scanning calorimeter (DSC) and contact angle measurement. According to SEM results, the polyimide-siloxane electrospun mats have nano-roughness morphology. Bead on string type surface morphology that has been generated by electrospinning yields stable superhydrophobicity with a contact angle of 167 degrees.