J. Mater. Sci. Technol. ›› 2023, Vol. 143: 253-267.DOI: 10.1016/j.jmst.2022.10.032

• Research Article • Previous Articles    

Copper ions-mediated dynamic redox-responsive microgels synergize with silicone for efficient and sustainable antibacterial properties

Huali Lia,b, Liuqin Zhanga,b, Xiaohu Zhanga, Shuwen Luoa, Baoshan Yangc, Min Wuc, Wei-Hua Lia, Fa-Qian Liua,*   

  1. aSchool of Chemical Engineering and Technology, Sun Yat-sen University, Zhuhai 519082, China
    bSchool of Materials Science and Engineering, Sun Yat-sen University, Guangzhou 510275, China
    cOffshore Oil Production Plant of Sinopec Shengli Oilfield Company, Dongying 257237, China
  • Received:2022-07-30 Revised:2022-07-30 Accepted:2022-07-30 Online:2023-04-14
  • Contact: *E-mail address: liufq7@mail.sysu.edu.cn (F.-Q. Liu).

Abstract: The antifouling of marine facilities placed below the waterline is a key constraint to the development of the marine economy. Currently, commercial Cu2O-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 Cu2O@poly(NIPAM-co-DAm) (Cu2O@PND) dynamic redox microgels triggered by copper ions and polydimethylsiloxane (PDMS). The catechol groups of PND nanogels can chelate Cu2+ and reduce it in situ to obtain Cu2O@PND microgels, which guarantees the stable release of Cu+. Furthermore, Cu2O remains stable and free from oxidation because of the electron transfer between PND and Cu2+. Finally, superior antifouling performance was achieved by combining the stable Cu+ released from Cu2O, in situ conversion of PND to hydrogel, and its oxidation to produce active substances and H2O2, and PDMS coating with low surface energy.

Key words: Hydrogel, Copper ions, Dynamic redox, Silicone, Efficient-sustainable release, Antibacterial