Increased sanitization potency of hydrogen peroxide with synergistic O₃ and intense pulsed light for non-woven polypropylene

Abstract

By introducing synergistic elements to the VHP processes, potent sanitization of polymeric filters is achieved at low H2O2 concentrations.

Antimicrobial activity of safe concentrations of ozone, hydrogen peroxide, and triethylene glycol in air and surfaces

“…Jeong et al used a combination of H 2 O 2 and O 3 at higher concentrations to obtain a complete disinfection in a chamber containing bacterial spore discs. 36 In our case, the combination of 0.2 ppm O 3 and 1 ppm H 2 O 2 led to a 1.3- and 1.8-fold enhancement compared to the individual O 3 and H 2 O 2 nebulisations, respectively. The viability reduction of the combination of 52 ppm TEG with 0.2 ppm O 3 was not different (67.5%) from the reduction produced by TEG alone, while the combination of 52 ppm TEG with 1 ppm H 2 O 2 resulted in a lower reduction (44.7%) as compared to individual TEG.…”

“…33 The antimicrobial capacity of TEG could be due to its activity as a dehydrating agent. 34,35 TEG was found to be non-toxic even when the atmosphere is saturated with TEG, 33,36 and potential ecotoxicological effects are not reported. 37 Some authors have found that polyethylene glycol (PG), which is very similar to TEG from the chemistry standpoint, increases the uidity of the viral membrane showing a broad effect on enveloped viruses such as SARS-CoV-2.…”

“…The antimicrobial activity of TEG, H 2 O 2 and O 3 has been evaluated mostly only under controlled conditions inside small and airtight chambers. 27,39,47,48 However, the results can differ when experiments are carried out in a real scenario. Thus, in the present work, we have analysed the chemical behaviour and the antimicrobial activity of the nebulization of low and safe concentrations of TEG, H 2 O 2 or O 3 , and their mixtures over commercial sporulated bacteria and naturally occurring bacteria and fungi in surfaces and in the air of a real scenario.…”

“…Furthermore, the combination of agents could increase the antimicrobial potential. In this regard, combinations of O 3 with H 2 O 2 have been tested, 39 but using concentrations that are above the exposure limits (Table 1), thereby impeding the application in occupied indoor spaces. Other mixtures such as fogging hypochlorous acid solution and hydrogen peroxide solution have been tested against SARS-CoV-2 and influenza A virus, being more efficient when they used together, and it was found that SARS-CoV-2 was more resistant than Influenza A virus.…”

Nanoparticle‐based nanocomposite coatings with postprocessing for enhanced antimicrobial capacity of polymeric film

“…Usually, the antimicrobial action of metal ion-based coatings is limited due to the hindered transport of the encapsulated metal ions through the polymer layer to reach the adherent microbes on the surface. The postprocessing methods, such as IPL flashing and corona treatment, increased surface roughness and facilitated the transport of ionic species and ROS (Jeong et al, 2021). Overall, with the developed coating compositions and the postprocessing methods, antibacterial coatings with different microbicidal mechanisms were achieved with the capability to kill microbes quickly on contact.…”