RAPID: Superhydrophobic and Photocatalytic Antimicrobial (SPA) Coatings

RAPID：超疏水和光催化抗菌 (SPA) 涂层

• 批准号: 2028535
• 负责人: Konstantin Sobolev
• 金额: $ 19.83万
• 依托单位: University of Wisconsin-Milwaukee
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2020
• 资助国家: 美国
• 起止时间: 2020-05-01 至 2022-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2028535&HistoricalAwards=false
• 关键词: RAPID; Superhydrophobic; Photocatalytic; Antimicrobial; SPA

The COVID-19 pandemic has resulted in drastic socioeconomic, educational, political and cultural impacts worldwide. Despite the measures currently undertaken, the latest projections of COVID-19 death toll range upwards of 100,000 across the U.S. The World Health Organization considers the main route of COVID-19 transmission to be through contact with surfaces that have been contaminated with small respiratory droplets that are released when COVID-19 patients cough or exhale. The virus that causes COVID-19 (SARS-CoV-2) retains infectivity on stainless steel surfaces for up to 72 hours, and the current absence of a vaccine and effective antiviral drugs makes it critical to explore novel approaches to breaking the chain of viral transmission. The project focuses on design and initial laboratory and field testing of a spray coating technology that can be applied to a variety of surfaces to both repel virus-laden droplets and photocatalytically deactivate viral pathogens that lodge on coated surfaces. More broadly, the project supports graduate and undergraduate training in the areas of surface coating technology and catalysis, and also engages local hospitals and university medical research facilities in assessing the efficacy of the coating technologies for combating a broad range of airborne pathogens.Specifically, the research investigates the pathogen inhibiting efficacy of superhydrophobic and photocatalytic antimicrobial (SPA) coatings, a group of sprayable materials which, through their combined modes of action, can confer self-disinfecting properties to a wide array of surfaces, such as metals, concrete, ceramics, glass, and wood, to help prevent the transmission of viral, bacterial, and other pathogens for a prolonged duration of time, ranging from several months to several years. The SPA coatings represent a novel two-pronged approach to repelling and deactivating viral pathogens. The coatings consist of nano-TiO2 and ZnO siloxane-modified superhydrophobic layers that serve to repel respiratory droplets, thus minimizing the ability of pathogens to linger on surfaces, while also facilitating cleaning procedures. The superhydrophobic layers are intermixed with TiO2, ZnO, and Ti-phosphate layers that impart photocatalytic activity. The photocatalytic material has potential to deactivate any pathogens that remain on the surface through the release of hydroxyl radicals. Doping of the materials with cuprous compounds further enhances the antimicrobial effect. Efficacy against the COVID-19 virus is the primary justification for the urgency of the research, which will proceed in parallel via both lab and field testing. Beyond the immediate impact on the current pandemic, the resulting technology will improve our nation’s preparedness for future waves of the same virus or other airborne pathogens. In addition, data obtained during the current pandemic will provide a fast track to scale-up, manufacturing and widespread deployment of the anti-viral coatings.This award is being funded by the CARES Act supplemental funds allocated to ENG and MPS.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

COVID-19大流行导致全球剧烈的社会经济，教育，政治和文化影响。尽管目前采取了这些措施，但美国卫生组织在美国，Covid-19死亡人数的最新项目范围超过100,000，但世界卫生组织认为Covid-19传播的主要途径是通过与已释放的小呼吸液滴污染的表面，这些途径是在Covid-19患者Coug或Exhale时释放的小呼吸液滴。导致COVID-19（SARS-COV-2）的病毒在不锈钢表面上保留了72小时的感染，并且目前缺乏疫苗和有效的抗病毒药，这对于探索破坏病毒传播链的新方法至关重要。该项目的重点是喷涂涂层技术的设计和初始实验室和现场测试，该技术可以应用于各种表面，以驱除含有病毒的液滴以及光催化性脱氧病毒病原体，这些病毒病原体会在涂层表面上产生。更广泛地说，该项目支持表面涂料技术和催化领域的毕业和本科培训，还可以参与当地医院和大学医学研究设施，以评估涂层技术在空中病原体中的有效性。通过它们的合并动作模式，可以将自我感染的特性召集到各种表面，例如金属，混凝土，陶瓷，玻璃和木材，以帮助防止病毒，细菌和其他病原体的传播持续时间，从而延长了几个月的时间。水疗涂层代表了一种新型的两管齐的方法，用于排斥病毒病原体。涂料由纳米-TIO2和ZnO硅氧烷修饰的超疏水层组成，用于排斥呼吸液滴，从而最大程度地减少了病原体在表面上徘徊的能力，同时也支持清洁程序。超疏水层与赋予光催化活性的TiO2，ZnO和Ti-phosphate层混合。光催化材料有可能通过释放羟基自由基的释放来停用任何保持表面上的病原体。用乡土化合物的材料掺杂进一步增强了抗菌作用。针对COVID-19病毒的功效是研究紧迫性的主要理由，该研究将通过实验室和现场测试并行进行。除了对当前大流行的直接影响之外，最终的技术还将改善我们国家为同一病毒或其他空降病原体的未来浪潮做准备。 In addition, data obtained during the current pandemic will provide a fast track to scale-up, manufacturing and widthspread deployment of the anti-viral coatings.This award is being funded by the CARES Act supplemental funds allocated to ENG and MPS.This award reflects NSF's statutory mission and has been deemed precious of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

项目成果

Synthesis of ZnO/TiO2-Based Hydrophobic Antimicrobial Coatings for Steel and Their Roughness, Wetting, and Tribological Characterization

• DOI: 10.1115/1.4053777
• 发表时间: 2022-08-01
• 期刊: JOURNAL OF TRIBOLOGY-TRANSACTIONS OF THE ASME
• 影响因子: 2.5
• 作者: Hasan, Md Syam;Zemajtis, Filip;Sobolev, Konstantin
• 通讯作者: Sobolev, Konstantin

Evaporation of droplets capable of bearing viruses airborne and on hydrophobic surfaces

• DOI: 10.1063/5.0023501
• 发表时间: 2021-01-14
• 期刊: JOURNAL OF APPLIED PHYSICS
• 影响因子: 3.2
• 作者: Hasan, Md Syam;Sobolev, Konstantin;Nosonovsky, Michael
• 通讯作者: Nosonovsky, Michael