Antibacterial behavior of copper glazes: effect of copper(II) oxide concentrations and sintering atmospheres

Choi, Jung-Hoon; Kim, Jin-Ho; Han, Kyu‐Sung; Kim, Ungsoo

doi:10.1007/s43207-021-00112-w

Cited by 6 publications

(9 citation statements)

References 47 publications

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“…Antibacterial ceramic surfaces are likely to be used as an advanced cleaning and disinfectant strategy in environments, where the growth of resistant bacteria is a major concern. To the best of our knowledge, the use of Cu or Cu compounds in a ceramic tile glaze modification to provide antibacterial surfaces is limited 9–13 . So, there is a need to explain the effect of Cu or CuO on the antimicrobial activity on ceramic surfaces.…”

Section: Introductionmentioning

confidence: 99%

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Copper oxide‐ and copper‐modified antibacterial ceramic surfaces

Açıkbaş

2021

J Am Ceram Soc.

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In the present study, copper oxide (CuO) and copper (Cu) particles were characterized and investigated to observe the effects of antimicrobial activity on ceramic tile surfaces. Scanning electron microscopy (SEM) and X-ray diffraction (XRD) techniques were used for particle characterization. A new formulation of antimicrobial glaze was achieved by the combination of two glaze compositions with different Cu and CuO content to obtain micro-nano hybrid surface morphology to provide the antibacterial property. Surface morphology of coated ceramic surfaces was examined by SEM in detail and water contact angles were measured with goniometer. The relationships between antibacterial effect, phase evolution, surface topography, and wettability of surfaces were determined. The tenorite phase of CuO was observed on both Cu-and CuO-modified surfaces. Both Cu and CuO particles in glazed ceramic surfaces showed the similar antibacterial activity against Staphylococcus aureus and Escherichia coli. The antibacterial activity was dependent on mainly tenorite phase crystallization. The amount of the tenorite phase that was slightly higher in the case of Cu-incorporated surfaces instead of CuO and hence the bactericidal effect was slightly more pronounced.Although the developed surfaces are not hydrophobic, they show antibacterial properties.

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Section: Introductionmentioning

confidence: 99%

“…To the best of our knowledge, the use of Cu or Cu compounds in a ceramic tile glaze modification to provide antibacterial surfaces is limited. [9][10][11][12][13] So, there is a need to explain the effect of Cu or CuO on the antimicrobial activity on ceramic surfaces.…”

Section: Introductionmentioning

confidence: 99%

Copper oxide‐ and copper‐modified antibacterial ceramic surfaces

Açıkbaş

2021

J Am Ceram Soc.

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“…There are two ways to realize antibacterial properties for ceramic tiles. The first is to coat the surface glaze with an antibacterial material, and the second is to include the antibacterial material in the surface glaze composition [7][8][9][10][11][12][13][14][15][16][17][18][19][20]. Conventional antibacterial porcelains are prepared by coating the surface glaze with a polymer solution or nano metal oxide (ZnO, CuO) sol that has sterilizing properties.…”

Section: Introductionmentioning

confidence: 99%

“…Copper glazes, which contain copper oxide, are traditional porcelain glazes, and it is known that a crystalline phase is formed during surface glazing, depending on the heat treatment conditions, resulting in various color changes [18][19][20][27][28][29]. In particular, Cu and Cu alloys are solid antimicrobial materials registered with the US Environmental Protection Agency and are widely used in the development of antibacterial products.…”

Section: Introductionmentioning

confidence: 99%

“…In particular, Cu and Cu alloys are solid antimicrobial materials registered with the US Environmental Protection Agency and are widely used in the development of antibacterial products. Our group reported that oxidation and reduction heat treatment conditions affect antibacterial properties and hydrophobicity when copper oxide or metallic copper is added to traditional porcelain glazes [18][19][20]36]. Reinosa et al reported that water repellency and antibacterial properties were realized by adding iron oxide and copper powder to the surface glaze of ceramic tiles [30].…”

Section: Introductionmentioning

confidence: 99%

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Antibacterial persistence of hydrophobically glazed ceramic tiles

Kim

Han

et al. 2022

J. Korean Ceram. Soc.

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The antibacterial properties and durability of copper-glazed ceramic tiles were systematically investigated in detail in terms of the hydrophobicity change with glaze thickness. The water contact angle of the standard glaze without copper was 25.2° ± 0.2°, whereas the copper glaze showed hydrophobicity which was dependent on the glaze thickness. A maximum contact angle of 109.6° ± 0.4° was measured from the copper-glazed surface with thickness of 150-200 μm. As the contact angle and hydrophobicity of the copper glaze increased, the antibacterial efficiency against Staphylococcus aureus and Escherichia coli also increased. An antibacterial efficiency of 99.9% was demonstrated from the copper-glazed sample with the thickness of 150-200 μm. In addition, it was confirmed that 99.9% of the antibacterial efficiency of the copper-glazed ceramic tiles could be maintained for at least 2 years. In ion dissolution measurements of the standard and copper glazes, Ca, Na, Si, and K ions were observed, and Cu ion dissolution was only observed from the copper glaze. These results suggests that the hydrophobicity and strongly negative surface charge, which were contributed from Cu addition into the glaze composition, could block the access of bacteria to the glaze surface, and bacterial killing via Cu ion dissolution occurs.

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Breathing‐Driven Self‐Powered Pyroelectric ZnO Integrated Face Mask for Bioprotection

Kim

Song

Lee

et al. 2022

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Rapid spread of infectious diseases is a global threat and has an adverse impact on human health, livelihood, and economic stability, as manifested in the ongoing coronavirus disease 2019 (COVID‐19) pandemic. Even though people wear a face mask as protective equipment, direct disinfection of the pathogens is barely feasible, which thereby urges the development of biocidal agents. Meanwhile, repetitive respiration generates temperature variation wherein the heat is regrettably wasted. Herein, a biocidal ZnO nanorod‐modified paper (ZNR‐paper) composite that is 1) integrated on a face mask, 2) harvests waste breathing‐driven thermal energy, 3) facilitates the pyrocatalytic production of reactive oxygen species (ROS), and ultimately 4) exhibits antibacterial and antiviral performance is proposed. Furthermore, in situ generated compressive/tensile strain of the composite by being attached to a curved mask is investigated for high pyroelectricity. The anisotropic ZNR distortion in the bent composite is verified with changes in ZnO bond lengths and OZnO bond angles in a ZnO4 tetrahedron, resulting in an increased polarization state and possibly contributing to the following pyroelectricity. The enhanced pyroelectric behavior is demonstrated by efficient ROS production and notable bioprotection. This study exploring the pre‐strain effect on the pyroelectricity of ZNR‐paper might provide new insights into the piezo‐/pyroelectric material‐based applications.

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Antibacterial behavior of copper glazes: effect of copper(II) oxide concentrations and sintering atmospheres

Cited by 6 publications

References 47 publications

Copper oxide‐ and copper‐modified antibacterial ceramic surfaces

Copper oxide‐ and copper‐modified antibacterial ceramic surfaces

Antibacterial persistence of hydrophobically glazed ceramic tiles

Breathing‐Driven Self‐Powered Pyroelectric ZnO Integrated Face Mask for Bioprotection

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