Disinfectant Performance of a Chlorine Regenerable Antibacterial Microfiber Fabric as a Reusable Wiper

Abstract

Rechargeable disinfectant performance of a microfiber fabric grafted with a halamine precursor, 3-allyl-5,5-dimethylhydantoin (ADMH), was tested in an actual use situation in a university student dining hall. The precursor was successfully incorporated onto the surfaces of polyester fibers by using a radical graft polymerization process through a commercial finishing facility. The N–H bonds of ADMH moieties on the fibers can be converted to biocidal N–Cl bonds, when the fabrics are washed in a diluted chlorine bleach containing 3000 ppm available chlorine, providing a refreshable disinfectant function. By wiping the surfaces of 30 tables (equivalent to 18 m2) with wet chlorinated fabrics, both Staphylococcus aureus and Escherichia coli in concentrations of 105 CFU/mL were totally killed in a contact time of 3 min. The disinfectant properties of the fabrics were still superior after 10 times successive machine washes (equivalent to fifty household machine washes), and rechargeable after wiping 30 tables before each recharge. Recharging conditions, such as temperature, time, active chlorine concentration and pH value of sodium hypochlorite solution, as well as the addition of a detergent, were studied. The product has the potential to improve public safety against biological contaminations and the transmission of diseases.

Daylight-Induced Antibacterial and Antiviral Cotton Cloth for Offensive Personal Protection

“…Antimicrobial agents can be incorporated onto PPE materials to provide offensive protection by disinfecting and deactivating the pathogens. For instance, rechargeable N -halamine biocidal materials have been designed and intensively studied for food packaging, self-cleaning textiles, and water disinfection. − However, the release of free chlorine from N -halamine materials is a health concern when they are used in face masks. Moreover, a plasmonic heating effect of silver nanoparticle coating was successfully applied on N95 masks, achieving improved antimicrobial functions under light illumination, accompanied by an instant temperature increase to around 80 °C on the surface of the masks .…”

Polyvinylidene fluoride multi-scale nanofibrous membrane modified using N-halamine with high filtration efficiency and durable antibacterial properties for air filtration

“…Each experiment was repeated five times under the same conditions, and the average value was calculated. The equation used to calculate the chlorine content was [44] : …”

Chemical, Thermo-Mechanical and Antimicrobial Properties of DBD Plasma Treated Disinfectant-Impregnated Wipes during Storage

“…), the disinfectant-impregnated wipes have to be stored in a shaded, cool, dry, stable and well-ventilated place. Thus, photochemical, thermal and mechanical degradations usually have a low impact and physical ageing occurs all along the lifetime of the product [13,14]. However, to the best knowledge of the authors, the understandings of the storage chemical ageing of wipes in the presence of disinfectant are very poor.…”