Optimizing the benefits of TiO2 in paints

Diebold, Michael P.

doi:10.1007/s11998-019-00295-2

Cited by 23 publications

(10 citation statements)

References 11 publications

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“…Similar results were also obtained from the surface roughness analyses by AFM (Figure c and f). This rough surface may indicate the aggregation of TiO 2 in the film, which can also affect the chalk resistance and gloss retention of the coating in the long term . Coatings formulated using polymer-encapsulated TiO 2 can, therefore, not only improve opacity at visible wavelengths as described in the previous work − but also boost the performance of cool coatings by increasing the NIR reflectance and TSR of coatings especially in a crowded high PVC system.…”

Section: Resultsmentioning

confidence: 81%

“…This rough surface may indicate the aggregation of TiO 2 in the film, which can also affect the chalk resistance and gloss retention of the coating in the long term. 46 Coatings formulated using polymer-encapsulated TiO 2 can, therefore, not only improve opacity at visible wavelengths as described in the previous work 39−41 but also boost the performance of cool coatings by increasing the NIR reflectance and TSR of coatings especially in a crowded high PVC system. However, the coating film containing 38.8 vol % TiO 2 using T01 was not successfully prepared due to the cracking and low fraction of the binder in the coating system.…”

Section: ■ Results and Discussionmentioning

confidence: 82%

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Polymer-Encapsulated TiO₂ for the Improvement of NIR Reflectance and Total Solar Reflectance of Cool Coatings

Dong

Quek

Herk

et al. 2020

Ind. Eng. Chem. Res.

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Cool coatings are solar reflective coatings and are applied on roofs, facades, and other exterior surfaces. In this work, the effect of polymer encapsulation was investigated aiming to improve near-infrared (NIR) reflectance of cool coatings. Cool coatings formulated using polymer-encapsulated TiO2 resulted in improvement (up to 10%) of NIR reflectance and, therefore, total solar reflectance in comparison to the coatings formulated using bare TiO2, especially in a high pigment volume concentration system. This is mainly due to the TiO2–TiO2 spacing and improved light scattering from the coating films. Enhanced cooling (2.5–11.2 °C) was also observed during heat buildup measurement tests conducted both in the lab under an artificial IR light source and at outdoor conditions under natural light.

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Section: Resultsmentioning

confidence: 81%

Section: ■ Results and Discussionmentioning

confidence: 82%

Polymer-Encapsulated TiO₂ for the Improvement of NIR Reflectance and Total Solar Reflectance of Cool Coatings

Dong

Quek

Herk

et al. 2020

Ind. Eng. Chem. Res.

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“…The rapid decrease in the reflectance ratios of wallpaper and paint in the lights in UV region may be caused by the low transmittance of UV-C light through vinyl chloride 31 , a main component of wallpaper, and by the absorption of UV-C light by titanium dioxide 32 , used in the coloring of the paint. For the reasons stated above, the inactivation of infectants wanes substantially on the surface of objects irradiated by the reflection effect of UV-C light compared with direct UV-C lighting.…”

Section: Discussionmentioning

confidence: 99%

Discussion on effect of material on UV reflection and its disinfection with focus on Japanese Stucco for interior wall

Endo

Gemma

Mitsuyoshi

et al. 2021

Sci Rep

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Research has previously shown that ultraviolet light C (UV-C) can inactivate unexpected infection. However, this type of potential disinfection is dramatically reduced for the shadow area such as under desk or medical equipment. Because the UV-C reflectance ratio is low on the general wall surfaces. We compared Stucco against the other materials to investigate whether we could improve disinfection for the shadow area. The reflectance ratios of UV-C irradiation of each material were examined, with particular attention to the rates for the author’s Modified Stucco. To evaluate the disinfection effects of the UV-C reflective lighting, colonies of E. coli and of Staphylococcus hominis were cultured in an agar media and counted over a certain time period after applying UV-C irradiation from a sterilizing lamp onto the investigation materials. The author’s Modified Stucco, produced reflectance ratios that was 11 times that of white wallpaper. This demonstrated that the UV-C reflected on the Stucco wall having optimum components and their compositions inhibited the number of E. coli and S. hominis, resulting in significantly disinfection effects on white wallpapers. The space with Modified Stucco and then irradiated by a UV-C may give a strong disinfection effect.

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“…These graffiti paint remains were characterized as a dense and voluminous C-rich matrix, with Ti and, as minor elements, S and Cl. Titanium from rutile (TiO 2 ), which is a stable phase [42], is commonly used as extender, brightener, or opacifier in paints [43,44]. SEM-EDX analyses clearly showed the presence of agglomerations of Ti-rich nanoparticles mainly on the surfaces cleaned with the solvent ternary mixtures, while the extent of these accumulations seemed to be reduced after the application of the laser.…”

Section: Discussionmentioning

confidence: 99%

Developing New Cleaning Strategies of Cultural Heritage Stones: Are Synergistic Combinations of a Low-Toxic Solvent Ternary Mixtures Followed by Laser the Solution?

et al. 2020

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As the UN Agenda 2030 recognizes heritage protection in several goals, this research was focused on the improvement of the graffiti removal from stones. The cleaning of two graffiti paints with different composition (an alkyd- and an acrylic–based paints) from two stones (gneiss and travertine) was performed considering a synergistic approach based on the combination of a low-toxic solvent ternary mixture, followed by an Nd:YAG laser. The different concentrations of the low-toxic solvents were based on the triangular Teas graph, keeping similar Hansen solubility of the products commonly used in conservation of cultural heritage: methyl ethyl ketone (MEK) and n-butyl acetate. The n-butyl acetate was replaced by mixture A (51% ethyl alcohol/11% acetone/38% isooctane) and MEK by mixture B (7%/13%/80%). Regardless of the graffiti composition, the gneiss was satisfactorily cleaned with the mixture A, while for the travertine, the best results were achieved by the mixture B. Then, surfaces treated with the mixtures were irradiated with a QS Nd:YAG laser working at 532 nm. The cleaning evaluation was performed by stereomicroscopy, color spectrophotometry, roughness measurements, reflectance measurements, and scanning electron microscopy. As result, regardless on the stone and the graffiti paints, it was confirmed the enhancement of cleaning of the mixtures followed by the Nd:YAG laser. However, it is crucial to identify previously the concentrations of the chemical products that allow the best performance considering the graffiti-stone interaction, on the one hand, and the optimal laser’s parameters, on the other hand.

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Optimizing the benefits of TiO2 in paints

Cited by 23 publications

References 11 publications

Polymer-Encapsulated TiO₂ for the Improvement of NIR Reflectance and Total Solar Reflectance of Cool Coatings

Polymer-Encapsulated TiO₂ for the Improvement of NIR Reflectance and Total Solar Reflectance of Cool Coatings

Discussion on effect of material on UV reflection and its disinfection with focus on Japanese Stucco for interior wall

Developing New Cleaning Strategies of Cultural Heritage Stones: Are Synergistic Combinations of a Low-Toxic Solvent Ternary Mixtures Followed by Laser the Solution?

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Optimizing the benefits of TiO2 in paints

Cited by 23 publications

References 11 publications

Polymer-Encapsulated TiO2 for the Improvement of NIR Reflectance and Total Solar Reflectance of Cool Coatings

Polymer-Encapsulated TiO2 for the Improvement of NIR Reflectance and Total Solar Reflectance of Cool Coatings

Discussion on effect of material on UV reflection and its disinfection with focus on Japanese Stucco for interior wall

Developing New Cleaning Strategies of Cultural Heritage Stones: Are Synergistic Combinations of a Low-Toxic Solvent Ternary Mixtures Followed by Laser the Solution?

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Product

Resources

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Polymer-Encapsulated TiO₂ for the Improvement of NIR Reflectance and Total Solar Reflectance of Cool Coatings

Polymer-Encapsulated TiO₂ for the Improvement of NIR Reflectance and Total Solar Reflectance of Cool Coatings