writer：1) Lijun Ye, Fei Chen, Jie Liu, Aiting Gao, Gunnar Kircher, Wendong Liu, Michael Kappl, Seraphine We
keywords：无
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.