Unique “posture” of rose Bengal for fabricating personal protective equipment with enhanced daylight-induced biocidal efficiency

Tang, Peixin; El-Moghazy, Ahmed Y.; Ji, Bolin; Nitin, Nitin; Sun, Gang

doi:10.1039/d1ma00100k

Cited by 17 publications

(17 citation statements)

References 32 publications

(48 reference statements)

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“…Because the dimerization of CV inhibits electron or energy transfer by self-quenching photoexcited CV, it is unfavorable to ROS generation [16] , [30] . However, the SAPC filter showed a monomeric band at 590 nm, the same as that exhibited by the solution form, which indicates dimerization inhibition [31] . It is attributable to the improved dispersity of the CV dye in the SAS matrix, caused by electrostatic interaction between cationic CV molecules and SAS matrix via hydrogen bonding [32] .…”

Section: Resultsmentioning

confidence: 77%

Photobiocidal-triboelectric nanolayer coating of photosensitizer/silica-alumina for reusable and visible-light-driven antibacterial/antiviral air filters

Jeong

Lee

et al. 2022

Chemical Engineering Journal

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Section: Resultsmentioning

confidence: 77%

Photobiocidal-triboelectric nanolayer coating of photosensitizer/silica-alumina for reusable and visible-light-driven antibacterial/antiviral air filters

Jeong

Lee

et al. 2022

Chemical Engineering Journal

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“…Experimental results showed that mixing such supernatant with the pathogens did not induce any killing effect, implying that the release of copper cations is not the major mechanism of antimicrobial action for the CuI-coated cotton fabrics. Even though ROS generation was reported before to account for the antimicrobial property of CuI and some other materials, ,− we speculate that it is not the main mechanism for the CuI-coated cotton fabrics, because (i) the presence of ROS in the CuI suspension was not detected with multiple attempts using 1,3-diphenylisobenzofuran (DPBF) as the probe, (ii) the CuI-coated fabrics need much shorter contact time to inactivate pathogens, compared to that in previous examples, , and (iii) the pathogen inactivation effect can be generally observed for both metabolically active ( e.g. , bacteria, fungi) and inactive pathogens ( e.g.…”

Section: Resultsmentioning

confidence: 80%

Water-Mediated In Situ Fabrication of CuI Nanoparticles on Flexible Cotton Fabrics as a Sustainable and Skin-Compatible Coating with Broad-Spectrum Antimicrobial Efficacy

Chen

Lau

Teo

et al. 2023

ACS Appl. Nano Mater.

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Infectious pathogens, such as SARS-CoV-2, can remain viable on common fabric surfaces for days, posing a significant risk of fomite transmission. Antimicrobial coatings are a widely employed approach for pathogen eradication upon direct contact. However, fabricating such coatings on fabric substrates mostly necessitates toxic organic solvents and complex equipment/ procedures. Most coatings also require a long contact time for complete disinfection, which may compromise their usefulness in mitigating the spread of highly infectious pathogens. Herein, we report a sustainable and scalable water-mediated method to prepare a copper iodide (CuI) coating on flexible cotton fabrics, attaining highly potent antimicrobial efficacy and rapid germicidal kinetics. Only water is required as the processing solvent for the in situ formation of CuI nanoparticles on the substrate, and the unconsumed reagents can be fully recycled, making the reported method a green, economical, and zero-waste technology promising for industrial scale-up. Within just 2 min of contact, the coated cotton fabric containing 5.1 wt % CuI nanoparticles exhibits near-complete inactivation of murine hepatitis coronavirus (>99.9%) and Salmonella bacteriophage P22 (>99.9999%) as models for the enveloped and nonenveloped viral species, respectively. It is also able to eliminate a variety of bacteria and fungi with 3.5−7.4 log reductions in 2−5 min. Furthermore, in view of the robust durability and skin compatibility of the coating, this simple yet powerful approach holds great promise for practical applications, especially in future infectious disease outbreaks.

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“…The antibacterial assays were performed according to a standard method of the AATCC 100 Test Method with modifications. − Specifically, in a typical antibacterial test, the bacterial culture solution underwent two cycles of centrifugation (5000 rpm, 8 min) with washing by 10 mL of cold sterile phosphate-buffered saline (PBS). Then, 20 mL of PBS was mixed with bacterial precipitates to form the final bacterial culture suspension.…”

Section: Methodsmentioning

confidence: 99%

Fiber-Supported Biocidal Porous Organic Polymer with High-Density N-Halamine Structures for Chlorine Rechargeable Water Disinfection

Yong-hui

Tang

2023

ACS Appl. Polym. Mater.

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Disinfecting pathogenic microorganisms in water streams efficiently and massively is still a big challenge in point-ofuse situations. Nowadays, available technologies are still suffering from irreversible consumption of disinfectants, production of carcinogenic byproducts, and high filtration resistance. Herein, we designed a chlorine rechargeable fiber-supported biocidal porous organic polymer (i.e., FPOP) according to a surface-activated in situ condensation methodology on cotton fibers. The presence of secondary amines in the FPOP enables it to be chlorinated to form N-halamine structures after treating it with a diluted chlorine bleach solution, allowing the FPOP to perform a potentially rapid and robust biocidal activity. The chlorinated FPOP, which possessed the combination of interfiber macropores and intrinsic meso/ micropores from the porous organic polymer, showed a high specific surface area, large and rechargeable active chlorine content (∼7000 ppm), long-term stability, efficient biocidal activity (>99.9999% bacteria reduction within 1 min of contact), and desirable filtration flux (>2000 L/m 2 h). The successful fabrication of FPOP indicated the promise of applying it as a filtration material for point-of-use water disinfection with superior killing capacity, high filtration flux, and low cost.

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Unique “posture” of rose Bengal for fabricating personal protective equipment with enhanced daylight-induced biocidal efficiency

Abstract: RB captured by super-adsorptive cotton achieves enhanced biocidal activity by alleviating aggregation-caused self-quenching and modulating the photoreaction of RB.

Cited by 17 publications

References 32 publications

Photobiocidal-triboelectric nanolayer coating of photosensitizer/silica-alumina for reusable and visible-light-driven antibacterial/antiviral air filters

Photobiocidal-triboelectric nanolayer coating of photosensitizer/silica-alumina for reusable and visible-light-driven antibacterial/antiviral air filters

Water-Mediated In Situ Fabrication of CuI Nanoparticles on Flexible Cotton Fabrics as a Sustainable and Skin-Compatible Coating with Broad-Spectrum Antimicrobial Efficacy

Fiber-Supported Biocidal Porous Organic Polymer with High-Density N-Halamine Structures for Chlorine Rechargeable Water Disinfection

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