Surface properties of partially fluorinated epoxy-based networks

PENOFF M.E.; MICCIO L. A.; LIAÑO R.; HOPPE C.E.; MONTEMARTINI P. E.; OYANGUREN P. A.

San José

Simposio; XII Simposio Latinoamericano de Polímeros; 2010

Laboratorio de Polímeros de la Universidad Nacional y Laboratorio Nacional de Nanotecnología del Centro Nacional de Alta Tecnología

Functionalizacion of epoxy-based networks to achieve materials with high hydrophobicity is described by employing two strategies: a) preferential surface enrichment of perfluorinated tails linked the network precursors [1], and b) incorporation of fluorocarbon-coated silver nanoparticles. The selected fluorinated epoxies (FE) were: 2,2, 3,3,4,4,5,5,6,6,7,7,8,9,9,9-hexadecafluoro-8-trifluoro methyl nonyloxirane (FED3) and 2,2,3,3,4,4,5,5, 6,6,7,7-dodecafluoroheptyl ether (FES3). Several series of crosslinked fluorinated epoxy-based materials containing variable fluorine contents (from 0 to 6 wt % F) were prepared using formulations based on partially fluorinated diamine, epoxy monomer and a curing agent. The epoxy monomer was based on diglycidyl ether of bisphenol A (DGEBA) while the curing agents were either propyleneoxide diamine (Jeffamine), 4,4´-Methylenebis(2,6-diethylaniline) (MCDEA) or 4,4´-methylene bis(3-chloro 2,6-diethylaniline) (MDEA).