Superhydrophobic photothermal coatings based on candle soot for prevention of biofilm formation
Superhydrophobic photothermal coatings based on candle soot for prevention of biofilm formation
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DOI：
10.1016/j.jmst.2022.06.005
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发表时间：
2022-06
期刊：
影响因子：
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通讯作者：
Yuancheng Lin;Haixin Zhang;Yiguo Zou;Kunyan Lu;Luohuizi Li;Yan Wu;Jingjing Cheng;Yanxia Zhang;Hong Chen;Qian Yu
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文献类型：
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作者：
Yuancheng Lin;Haixin Zhang;Yiguo Zou;Kunyan Lu;Luohuizi Li;Yan Wu;Jingjing Cheng;Yanxia Zhang;Hong Chen;Qian Yu
材料表面细菌生物膜的形成给人类健康和工业生产带来了一系列严重的问题。成熟生物膜的处理特别困难，因为它们固有地对抗生素和其他不利因素具有高度抗性。预防在战略上优于处理，因此高度需要开发具有抑制生物膜形成能力的创新表面。在这项工作中，我们开发了一种用于防止生物膜形成的超疏水光热涂层，该涂层基于具有分级结构和优异的光热转换能力的蜡烛烟灰。该涂层是通过在基底上沉积蜡烛烟灰层，然后依次化学气相沉积四乙氧基硅烷和固定氟化硅烷以使涂层坚固和超疏水来制造的。在近红外激光短时间照射下，涂层能在初期将大部分细菌从表面驱除出去，然后将残留在表面的少量细菌消灭。该涂层具有良好的防粘性能和光热杀菌性能，可防止生物膜形成至少2周。该涂层易于沉积在各种基底上，具有良好的储存稳定性，在解决材料和器件的生物膜相关问题的各种实际应用中显示出巨大的潜力。
Bacterial biofilms formed on the material surfaces have posed a series of serious problems for human health and industries. The treatment of mature biofilms is particularly difficult because they are inherently highly resistant against antibiotics and other adverse factors. The prevention is strategically advantageous over the treatment, and thus the development of innovative surfaces with capability to inhibit biofilm formation is highly demanded. In this work, we developed a superhydrophobic photothermal coating for prevention of biofilm formation, which was based on candle soot with hierarchical structure and excellent light-to-heat conversion ability. This coating was fabricated by deposition of a candle soot layer on the substrate, followed by sequential chemical vapor deposition of tetraethoxysilane and immobilization of fluorinated silane to make the coating robust and superhydrophobic. The resulted coating could repel a majority of bacteria from the surface at the early stage, and then eradicate a small number of bacteria remained on the surface under a short-term irradiation of near-infrared laser. The combination of anti-adhesive property and photothermal bactericidal property endowed the coating with good antibiofilm property to prevent biofilm formation for at least 2 weeks. This coating is facile for deposition on various substrates with good storage stability, showing great potential for diverse practical applications to solve the biofilm-associated problems of materials and devices.