Bienzyme system immobilized in biomimetic silica for application in antifouling coatings

• Published in: Chinese journal of chemical engineering Vol. 23; no. 8; pp. 1384 - 1388
• Main Authors: Wang, Hongwu, Jiang, Yanjun, Zhou, Liya, Gao, Jing
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.08.2015
• Subjects: Antifouling; Bienzyme; Coating; H2O2; α-淀粉酶; 仿生; 固定化; 应用; 硅胶; 葡萄糖氧化酶; 酶系统; 防污涂料; Bienzyme; Coating; H2O2; Antifouling
• ISSN: 1004-9541; 2210-321X
• DOI: 10.1016/j.cjche.2015.05.001

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 α-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@BScontaining coating releases H2O2 at rates exceeding a target of 36 nmol·cm-2·d-1for 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.