4.8 Article

Amphiphilic Cross-Linked Liquid Crystalline Fluoropolymer-Poly(ethylene glycol) Coatings for Application in Challenging Conditions: Comparative Study between Different Liquid Crystalline Comonomers and Polymer Architectures

Journal

ACS APPLIED MATERIALS & INTERFACES
Volume 8, Issue 49, Pages 33386-33393

Publisher

AMER CHEMICAL SOC
DOI: 10.1021/acsami.6b11112

Keywords

amphiphilic; liquid crystalline; dynamic coating hyperbranched; anti-icing

Funding

  1. Office of Naval Research [N00014-14-1-0082, N00014-15-1-2280]
  2. W.T. Doherty-Welch Chair in Chemistry [A-0001]

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Linear and hyperbranched poly(ethylene glycol)-cross-linked amphiphilic fluoropolymer networks comprised of different liquid crystalline comonomers were developed and evaluated as functional coatings in extreme weather-challenging conditions. Through variation of the liquid-crystalline comonomer and hydrophilic:hydrophobic component ratios, several series of coatings were synthesized and underwent a variety of analyses including differential scanning calorimetry, water contact angle measurements and solution stability studies in aqueous media. These materials maintained an unprecedented reduction in the free water melting transition (T-m) temperature across the hyperbranched and linear versions. The coatings synthesized from hyperbranched fluoropolymers preserved the liquid crystalline character of the mesogenic components, as seen by polarized optical microscopy, and demonstrated stability in saltwater aqueous environments and in cold weather conditions.

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