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Specific Ion Effects on the Enzymatic Degradation of Polymeric Marine Antibiofouling Materials
journal contribution
posted on 2019-08-13, 14:11 authored by Jie Zhu, Jiansen Pan, Chunfeng Ma, Guangzhao Zhang, Guangming LiuIt
is expected that the widely dispersed ions in seawater would
have strong influence on the performance of polymeric marine antibiofouling
materials through the modulation of enzymatic degradation of the materials.
In this work, poly(ε-caprolactone)-based polyurethane and poly(triisopropylsilyl
methacrylate-co-2-methylene-1,3-dioxepane) have been
employed as model systems to explore the specific ion effects on the
enzymatic degradation of polymeric marine antibiofouling materials.
Our study demonstrates that the specific ion effects on the enzymatic
degradation of the polymer films are closely correlated with the ion-specific
enzymatic hydrolysis of the ester. In the presence of different cations,
the effectiveness of the enzyme to degrade the polymer films is dominated
by the direct specific interactions between the cations and the negatively
charged enzyme molecules. In the presence of different anions, the
kosmotropic anions give rise to a high enzyme activity in the degradation
of polymer films induced by the salting-out effect, whereas the chaotropic
anions lead to a low enzyme activity in the degradation of the polymer
films owing to the salting-in effect. This work highlights the opportunities
available for the use of specific ion effects to modulate the enzymatic
degradation of polymeric antibiofouling materials in the marine environment.