The antifouling of marine facilities placed below the waterline is a key constraint to the development of the marine economy.Currently,commercial Cu_(2)O-based antifouling coatings still have defects such as agglomera...The antifouling of marine facilities placed below the waterline is a key constraint to the development of the marine economy.Currently,commercial Cu_(2)O-based antifouling coatings still have defects such as agglomeration,oxidation,short duration and high dosage.For this reason,we developed for the first time a triple antifouling system consisting of Cu_(2)O@poly(NIPAM-co-DAm)(Cu_(2)O@PND)dynamic redox micro-gels triggered by copper ions and polydimethylsiloxane(PDMS).The catechol groups of PND nanogels can chelate Cu^(2+)and reduce it in situ to obtain Cu_(2)O@PND microgels,which guarantees the stable release of Cu^(+).Furthermore,Cu_(2)O remains stable and free from oxidation because of the electron transfer between PND and Cu^(2+).Finally,superior antifouling performance was achieved by combining the stable Cu^(+)re-leased from Cu_(2)O,in situ conversion of PND to hydrogel,and its oxidation to produce active substances and H_(2)O_(2),and PDMS coating with low surface energy.展开更多
基金financially supported by the National Natural Science Foundation of China (No.52073311)the Guangdong Basic and Applied Basic Research Foundation (Nos.2020A1515011274 and 2021A1515012281).
文摘The antifouling of marine facilities placed below the waterline is a key constraint to the development of the marine economy.Currently,commercial Cu_(2)O-based antifouling coatings still have defects such as agglomeration,oxidation,short duration and high dosage.For this reason,we developed for the first time a triple antifouling system consisting of Cu_(2)O@poly(NIPAM-co-DAm)(Cu_(2)O@PND)dynamic redox micro-gels triggered by copper ions and polydimethylsiloxane(PDMS).The catechol groups of PND nanogels can chelate Cu^(2+)and reduce it in situ to obtain Cu_(2)O@PND microgels,which guarantees the stable release of Cu^(+).Furthermore,Cu_(2)O remains stable and free from oxidation because of the electron transfer between PND and Cu^(2+).Finally,superior antifouling performance was achieved by combining the stable Cu^(+)re-leased from Cu_(2)O,in situ conversion of PND to hydrogel,and its oxidation to produce active substances and H_(2)O_(2),and PDMS coating with low surface energy.
