Surface Structure of Fluorinated Polymers and Block Copolymers

摘要

The self-organization of semifluorinated segments was used to create polymers and block copolymers with ultralow surface free energy. The aromatic polyester poly(p-phenylene oxydecyl-perfluorodecyl-isophthalate) shows an extremely low value of γ_(sv) of 9 mN/m. It could be proved that this low value is caused by an ordered surface structure. Introduction of semifluorinated polyester segments into block copolymers combines the good film-forming properties of polysulfone with the low surface free energy of the semifluorinated polyester, resulting in materials with both good mechanical performance as well as anti-adhesion properties. These block copolymers can be used to prepare blends with the respective homopolymers with different degree of phase separation. The polymers and block copolymers can form a self-cleaning surface when coated on roughened aluminium substrates which is due to the combination of low surface free energy and roughness. Besides, it was shown that the adsorption of proteins such as human serum albumin and fibrinogen from buffer solutions is significantly decreased on such polymer surfaces.