Towards an efficient and durable self-cleaning acrylic paint containing mesoporous TiO 2  microspheres

Amorim, Suélen Maria de; Suave, Jaqueline; Andrade, Luísa; Mendes, Adélio; José, Humberto Jorge; Moreira, Regina de Fátima Peralta Muniz

doi:10.1016/j.porgcoat.2018.01.005

Cited by 49 publications

(27 citation statements)

References 30 publications

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“…The best coating conditions using TiO 2 is evidenced by comparing refraction indexes (RIs). The forms anatase and rutile show 2.55 and 2.73, respectively, indicating the wider use of the rutile form [3]. The RI of TiO 2 is 1.7-fold and 1.4-fold higher than of calcium carbonate and zinc oxide, respectively.…”

Section: Introductionmentioning

confidence: 94%

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Fast and simple spectrophotometric procedure for determination of TiO2 in paint samples

Rocha¹,

Reis²,

Maringolo³

2019

Br J Anal Chem

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Titanium dioxide is separated from other components in paint samples, and solubilized. After the addition of hydrogen peroxide, a colored complex with absorption maximum at 435 nm is obtained. Thus, spectrophotometric analytical response can be registered, yielding a simpler, inexpensive, and faster analysis than the titrimetric reference procedure. Paints are commonly used to protect solid surfaces and to cover imperfections. The composition alters the characteristics of the paint such as brightness, and resistance to abrasion. An important component of paints is TiO 2 , which yields a strong white color and opacity. Due to the cost of this raw material, its employment is limited. The determination of TiO 2 is important for quality control and for developing formulations with lower content of TiO 2. Additionally, deformulation studies are generally carried out aiming at aiding market assessment. The reference procedure for determination of TiO 2 is based on a volumetric method using highly unstable species such as Ti(III) and Fe(II), making it extremely susceptible to systematic errors. Alternative procedures with atomic absorption or emission techniques are expensive for research laboratories in the industry, especially when the determination of a few metals is required. In this sense, a simple spectrophotometric procedure for TiO 2 determination in paint samples is herein proposed, based on the reaction between Ti(IV) and H 2 O 2 that yield a soluble complex with absorption maximum at 435 nm. The univariate optimization of the parameters was carried out aiming at best sensitivity and analytical frequency, and minimum reagent consumption and waste generation. Linear response was observed between 6.0 and 60 mg L-1 Ti. Detection limit (n = 20, 99.7% confidence level) and coefficient of variation (n = 20) were estimated at 2.8 mg L-1 and 1.2 %, respectively. Sample preparation was based on ashing, and dissolution in hot mixture of sulfuric and hydrochloric acids. The analysis of the digests by the proposed and the titrimetric reference procedures agreed at the 95% confidence level. The developed procedure is a faster, low-cost, reliable and cleaner alternative for determination of TiO 2 in paint samples.

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Section: Introductionmentioning

confidence: 94%

“…Additionally, the content and refraction index of these components affect efficiency of the coating and brightness. The most used pigment in paint samples is TiO 2 that yields high efficient coating and whiteness [3].…”

Section: Introductionmentioning

confidence: 99%

Fast and simple spectrophotometric procedure for determination of TiO2 in paint samples

Rocha¹,

Reis²,

Maringolo³

2019

Br J Anal Chem

View full text Add to dashboard Cite

show abstract

Section: Introductionmentioning

confidence: 99%

“…Photocatalytic paints are self-cleaning, since undesirable substances on the surface are removed through the simple incidence of light 1 . This photocatalytic activity, however, is not selective and in addition to pollutants the polymer paint matrix can be degraded 1,2 . Most research has been focused on photocatalytic paints formulated with anatase nanoparticles, due to their high photocatalytic activity [3][4][5][6][7][8] .…”

Section: Introductionmentioning

confidence: 99%

“…Most research has been focused on photocatalytic paints formulated with anatase nanoparticles, due to their high photocatalytic activity [3][4][5][6][7][8] . However, nanoparticles, which have a high surface area, when homogeneously distributed in the film and under a light source, tend to rapidly degrade the paint film around them, causing photochalking 1,9 .…”

Section: Introductionmentioning

confidence: 99%

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Antifungal and Photocatalytic Activity of Smart Paint Containing Porous Microspheres of TiO2

et al. 2019

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In this study, porous microspheres of TiO 2 (µTiO 2) were synthesized, characterized and incorporated into an acrylic paint formulation to obtain a photocatalytically active paint. In a novel approach, the antifungal properties of the µTiO 2 paint were evaluated using Monascus ruber as the representative microorganism and compared to those of a photocatalyst-free paint. The photocatalytic activity of paint films was determined by methylene blue (MB) degradation under real conditions of application. High photocatalytic and antifungal activity was observed, with the microorganism culture showing the formation of growth inhibition halos, typical of materials that produce biocides that diffuse into the culture medium.

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Remediation of Fouling on Painted Steel Roofing via Solar Energy Assisted Photocatalytic Self‐Cleaning Technology: Recent Developments and Future Perspectives

Fernando¹,

Ray²,

Simpson³

et al. 2022

Adv Eng Mater

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Rainwater harvesting on rooves is a sustainable solution for global water scarcity. The contamination of roofing materials due to biological organisms and other environmental pollutants limits the utilization of roof harvested rainwater for domestic and industrial applications. Similarly, roof contamination leads to several aesthetic, functional, and environmental concerns highlighting the importance of developing green self-cleaning technology for roofing applications. Solar-energy-driven semiconductor-based photocatalytic self-cleaning coatings are a promising approach to minimizing roof contamination against both biological and non-biological pollutants. However, the development of such technology on painted steel substrates for long-term outdoor applications has become limited due to the number of challenges are analyzed in this review. Accordingly, challenges, recent developments, and future perspectives of developing and evaluating the performance of photocatalytic self-cleaning coating systems for roofing applications have been critically reviewed in this article analyzing the research findings of recent studies.

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Towards an efficient and durable self-cleaning acrylic paint containing mesoporous TiO 2 microspheres

Cited by 49 publications

References 30 publications

Fast and simple spectrophotometric procedure for determination of TiO2 in paint samples

Fast and simple spectrophotometric procedure for determination of TiO2 in paint samples

Antifungal and Photocatalytic Activity of Smart Paint Containing Porous Microspheres of TiO2

Remediation of Fouling on Painted Steel Roofing via Solar Energy Assisted Photocatalytic Self‐Cleaning Technology: Recent Developments and Future Perspectives

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