writer：1) Lijun Ye, Fei Chen, Jie Liu, Aiting Gao, Gunnar Kircher, Wendong Liu, Michael Kappl, Seraphine We
keywords：無
source：期刊
specific source：Macromol. Rapid Commun.
Issue time：2019年
The synthesis of ionogels with a responsive, self-replenishing surface for
combating biofouling is described. Ionogels are prepared by infiltrating
poly(vinylidene fluoride-co-hexafluoropropylene) with binary mixtures of ionic
liquids (IL): 1-octadecyl-3-methylimidazolium bis(trifluoromethyl sulfonyl)
imide ([C18C1im][NTf2], melting point Tm = 55 °C) and 1-hexyl-3-methylimida-
zolium bis(trifluoromethyl sulfonyl)imide ([C6C1im][NTf2], Tm = ?9 °C). The IL
mixtures release spontaneously from the gel matrix and eventually crystallize
on the surface. This leads to self-replenishment of the surface of ionogels
even after mechanical damage. The incorporation of [C6C1im][NTf2] provides
the antimicrobial efficacy of ionogels while the crystals of [C18C1im][NTf2]
serve as a skeleton maintaining [C6C1im][NTf2] on the surface. By heating, the
ionogel surface transforms from solid to liquid-infused state—the removal of
biofilms/bacteria developed under a long time of colonization is facilitated.
The antimicrobial efficacy is maintained even after several cycles of biofilm
formation and detachment. This work provides an opportunity to apply
ionogels as functional coatings with renewable antibiofouling properties.