Bienzyme system immobilized in biomimetic silica for application in antifouling coatings

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• 作者：Hongwu Wang¹ ; Yanjun Jiang¹ ; ² ; ^{yanjunjiang@hebut.edu.cn" class="auth_mail" title="E-mail the corresponding author} ; Liya Zhou¹ ; Jing Gao¹ ; ^{jgao@hebut.edu.cn" class="auth_mail" title="E-mail the corresponding author}
• 关键词：Antifouling ; Bienzyme ; H2O2 ; Coating
• 刊名：Chinese Journal of Chemical Engineering
• 出版年：2015
• 出版时间：August 2015
• 年：2015
• 卷：23
• 期：8
• 页码：1384-1388
• 全文大小：972 K

文摘

Antifouling coatings are used extensively on vessels and underwater structures. Conventional antifouling coatings contain toxic biocides and heavy metals, which may induce unwanted adverse effects such as toxicity to non-target organisms, imposex in gastropods and increased multiresistance among bacteria. Therefore, enzyme-based coatings could be a new alternative solution. A H₂O₂-producing bienzyme system was developed in this study. H₂O₂ can be produced from starch by the cooperation of 伪-amylase and glucose oxidase, which promotes the hydrolysis of polymeric chain and oxidizes the glucose to produce H₂O₂, respectively. The encapsulated bienzyme (A-G@BS) exhibits enhanced stabilities of thermal, pH, recycling and tolerance of xylene. The A-G@BS-containing coating releases H₂O₂ at rates exceeding a target of 36 nmol·cm^− 2·d^− 1 for 90 days in a laboratory assay. The results demonstrate that the method is a promising coating technology for entrapping active enzymes, presenting an interesting avenue for enzyme-based antifouling solutions.