Formation of Honeycomb Films Based on Cardo Polyimide Modified with Fluorocontaining Organosilicon Copolymers by Breath Figures Method

Abstract

Porous films were prepared on the base of the cardo polyimide soluble in organic solvents and modified with fluorocontaining organosilicon copolymers. The fluorinated organosilicon copolymers with various molecular weights were used as hydrophobic modifiers. It was shown that addition of modifiers leads to formation of porous structure with monomodal size distribution. Modification of the polyimide with copolymers in combination with the surface structuring resulted in formation of the highly hydrophobic porous films with contact angle 137°.

Modification of Epoxy Coatings with Fluorocontaining Organosilicon Copolymers

“…To obtain hydrophobic coating, low-surface-energy materials such paraffins [ 9 , 10 ], fluorine-containing compounds [ 11 , 12 , 13 ], organosilicon compounds [ 14 , 15 , 16 ], and fluorinated organosilicon compounds [ 17 , 18 , 19 , 20 , 21 ] can be used. However, each of them has quite significant drawbacks.…”

“…This advantage opens up wide possibilities for using these compounds. For example, in work [ 20 ], new UV-curable fluorine-containing organosilicon compounds were synthesized and characterized, and coatings based on these materials with a water contact angle of 121° and a water roll-off angle of 25° were also obtained. Works [ 21 , 22 , 23 , 24 ] describe in detail the preparation of a superhydrophobic coating based on fluorine-containing organosilicon compounds on a specially prepared aluminum substrate.…”

A Novel Hydrophobic Polyimide Film with Sag Structure Derived from Multi‐Hybrid Strategy

“…First one is introducing the fluorine‐containing structures into PI matrix. [ 21–23 ] Fluorine atoms have low electron polarization and high electronegativity, and C─F bonds have high bonding energy, which makes it difficult to form hydrogen bonds with water as electron donor. [ 24–27 ] Li et al.…”