Containment of Spreading of Corona using our Foam Spray

P. Somasundaran, Lavon Duddleson Krumb Professor of Mineral Engineering, Department of Earth and Environmental Engineering

Viruses are usually contained by spraying bleach on the surfaces of hospitals, and vehicles. Such sprays do not stick to plastic protective clothings and are therefore applied multiple times, which result in seepage into the ground and when inhaled can irritate respiratory tracts. Moreover, these solutions do not penetrate into crevices of ceilings and carpets or under jewelry during hand washing. Our work overcomes these issues by formulating the disinfectants with benign biosurfactants and super penetrants or use as dry foams designed to stick to surfaces long enough to decontaminate. The natural formulations will be inexpensive and can be prepared in place in the United States and other countries from concentrates and can be a basis for use in any future epidemics or recurring of COVIDS. The objective is to prepare foam formulations differing in disinfectant and surfactants, and test them for their foamability, foam robustness and the nano structure to be deployed using sprayers of various scales for use in hand washing and for decontaminating vehicles and corpses. Biosurfactants such as surfactin will be used as a foam stabilizer, which exhibits anti-viral properties. Spreading power will be assessed as a function of dosage using a tensiometer and the foamability and stability using our foam scan. A variety of delivery equipment from household and backpack sprayer to lancer will be designed to deliver foam. The tile surfaces after foam breaks will be analyzed using electron and Raman microscopies to assess the uniformity and robustness of the application.

Viruses are usually contained by spraying bleach on the surfaces of hospitals, and vehicles. Such sprays do not stick to plastic protective clothings and are therefore applied multiple times, which result in seepage into the ground and when inhaled can irritate respiratory tracts. Moreover, these solutions do not penetrate into crevices of ceilings and carpets or under jewelry during hand washing. Our work overcomes these issues by formulating the disinfectants with benign biosurfactants and super penetrants or use as dry foams designed to stick to surfaces long enough to decontaminate. The natural formulations will be inexpensive and can be prepared in place in the United States and other countries from concentrates and can be a basis for use in any future epidemics or recurring of COVIDS. The objective is to prepare foam formulations differing in disinfectant and surfactants, and test them for their foamability, foam robustness and the nano structure to be deployed using sprayers of various scales for use in hand washing and for decontaminating vehicles and corpses. Biosurfactants such as surfactin will be used as a foam stabilizer, which exhibits anti-viral properties. Spreading power will be assessed as a function of dosage using a tensiometer and the foamability and stability using our foam scan. A variety of delivery equipment from household and backpack sprayer to lancer will be designed to deliver foam. The tile surfaces after foam breaks will be analyzed using electron and Raman microscopies to assess the uniformity and robustness of the application.

Total decontamination of any surface not only requires coverage of bleach-foam but also reach of this foam on all microscopic and nanoscopic edges and cracks. Spectroscopic mapping of the surfaces including edges and cracks will be carried out. Examination of the surfaces for bleach deposition at a nanoscopic (area-wise) level can be ensured using two techniques, Cryo TEM and Raman micro-spectrometric area mapping. A selected group of bleach foam formulations will be provided to third party to assess whether the foam formed kill > 99% of germs. Furthermore, the formulation will be provided to NYPD, schools and facilities (schools, industries, church, airport, hospital) to obtain feedback on the ease of application of the bleach formulation for deep clean up. A questionnaire will be provided to obtain information on the smell generated during bleach application, and relate to if the rate of application can be related to a number of people infected associated with that facility.