Synthesis and properties of low-surface-energy polyimides

Hai Zhong Wang, Qian Ye, Xiao Long Wang

Research output: Contribution to journalArticlepeer-review

Abstract

An aromatic diamine monomer, 1H,1H-perfluorooctyl 3,5-diaminobenzoate (PFD), was synthesized in three steps, which was used to prepare the polyimides containing pendant perfluoroalkyl chains via the polymerization of PFD with commercial 4,4′-(hexafluoroisopropylidene)diphthalic anhydride. Various characterization techniques including thermogravimetric analysis, infrared spectroscopy, and X-ray photoelectron spectroscopy were used to characterize the new polyimides with perfluoroalkyl chains. The resulting polyimide film exhibits hydrophobicity with a contact angle of 95° for water, and the calculated surface free energy is 37.4mNm-1. Superhydrophobic surfaces were also demonstrated by coating the polyimide containing pendant perfluorooctyl chains on rough alumina substrate.

Original languageEnglish
Pages (from-to)1926-1928
Number of pages3
JournalChemistry Letters
Volume43
Issue number12
DOIs
StatePublished - 2014
Externally publishedYes

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