RAPID:Novel Foam formulations for decontamination of surfaces with minimum wastewater generation

RAPID：用于表面净化的新型泡沫配方，同时最大限度地减少废水产生

• 批准号: 2026740
• 负责人: Ponisseril Somasundaran
• 金额: $ 10.08万
• 依托单位: Columbia University
• 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: 2020-04-01 至 2020-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2026740&HistoricalAwards=false
• 关键词: RAPID; Novel; Foam; formulations; decontamination

The broader impact of this RAPID project is to advance the understanding of a new disinfectant composition. A common approach to contain the spread of infectious diseases involves spraying decontaminating disinfectants onto the floors in hospitals, apartments, parks, airports, footpaths, and other surfaces. The disinfectants commonly used are bleach, hydrogen peroxide, phenols and iodophors. Sprays of such solutions on surfaces do not stick to surfaces of protective clothing and hence have to be applied multiple times a day for decontamination results. Furthermore, such operations can result in seepage of the solutions into the ground. Considering the pandemic nature of infectious diseases such as COVID-19, decontamination practices can often span for months, causing prolonged exposure to disinfectant fumes that may be harmful to the lungs and irritating for the respiratory tract. The proposed project aims to overcome these issues by developing and applying disinfectant formulations as a foam allowing sufficient exposure. A foam with super spreaders can penetrate cracks and crevices, sticking to surfaces long enough to decontaminate. The formulation will be designed for decontamination of floors and windows in houses, vehicles, hospitals, and large areas such as airports. In order to further minimize the use of disinfectants such as bleach, an antimicrobial reagent serving as the foaming agent will be used. This will benefit communities experiencing contagious diseases. The objective of this RAPID project is to prepare a set of innovative foam formulations that differ in disinfectant and surfactant type, and test them for their foamability and deployment using a sprayer. A biosurfactant surfactin that also exhibits anti-microbial properties will be used as a foam stabilizer. This project will: Determine the air/water interfacial tension as a function of surfactant concentration; study parameters, including the rates of foam formation (foamability) and breaking (stability), as well as bubble size; determine and correlate storage and rigidity modulus values for the foams with foam texture for different air/water ratios; study deployment with a variety of delivery equipment, such as household and backpack sprayer and foam lancer; characterize the time-dependent texture of foam formed on a tile surface and relate it to the foamability, the foam-stability parameters, and the storage and elastic modulus values. The tile surfaces after foam completely breaks down will be analyzed using an electron microscope to assess if disinfectant is deposited uniformly or in the form of patches. This assessment will be verified using the Raman spectroscopic mapping of the tile surface; the interfacial tension data at different ratios of surfactant types provide an estimate of their adsorption density at the air/water interface in the presence of hypochlorite ions in the aqueous phase, while the foam stability parameters provide insights into their intermolecular interactions at the interface and the possibility of synergistic effects among different types of surfactants that govern the stability of a foam.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.

这一快速项目的更广泛影响是促进了对一种新消毒剂成分的理解。控制传染病传播的一种常见方法是在医院、公寓、公园、机场、人行道和其他表面的地板上喷洒消毒消毒剂。常用的消毒剂有漂白剂、过氧化氢、酚类和碘伏。这种溶液喷洒在表面上不会粘在防护服的表面上，因此必须一天多次喷洒才能达到去污效果。此外，这样的操作可能会导致溶液渗入地下。考虑到新冠肺炎等传染病的大流行性质，净化操作往往会持续数月，导致长时间暴露在可能对肺部有害并刺激呼吸道的消毒剂烟雾中。拟议的项目旨在通过将消毒剂配方开发和应用为允许充分暴露的泡沫来克服这些问题。带有超级散布器的泡沫可以穿透裂缝和缝隙，粘在表面足够长的时间来净化污染。该配方将用于净化房屋、车辆、医院和机场等大片地区的地板和窗户。为了进一步减少使用消毒剂，如漂白剂，将使用抗菌剂作为发泡剂。这将使经历传染病的社区受益。这个快速项目的目标是准备一套不同消毒剂和表面活性剂类型的创新泡沫配方，并使用喷雾器测试它们的发泡性和部署。一种也具有抗微生物特性的生物表面活性剂表面活性物质将被用作泡沫稳定剂。本项目将：确定空气/水界面张力作为表面活性剂浓度的函数；研究参数，包括泡沫形成(发泡性)和破裂(稳定性)的速率，以及气泡大小；确定并关联具有不同气水比的泡沫质地的泡沫塑料的存储和刚性模量值；研究使用各种输送设备，如家用和背包式喷雾器和泡沫激励器；表征瓷砖表面形成的泡沫塑料的随时间变化的纹理，并将其与发泡性、泡沫稳定性参数、存储和弹性模量值相关联。泡沫完全分解后的瓷砖表面将用电子显微镜进行分析，以评估消毒剂是均匀沉积还是以贴片的形式沉积。这一评估将使用瓷砖表面的拉曼光谱图谱进行验证；不同比例的表面活性剂类型的界面张力数据提供了在水相中存在次氯酸盐离子的情况下它们在空气/水界面上的吸附密度的估计，而泡沫稳定性参数提供了对它们在界面上的分子间相互作用以及不同类型的表面活性剂之间控制泡沫稳定性的协同效应的可能性的洞察。该奖项反映了NSF的法定使命，并通过使用基金会的智力优势和更广泛的影响审查标准进行评估，被认为值得支持。