Photoactive self-cleaning polymer coatings by TiO2 nanoparticle Pickering miniemulsion polymerization

González, Edurne; Bonnefond, Audrey; Barrado, Mariano; Barrasa, Aurora Maria Casado; Asúa, José M.; Leiza, José R.

doi:10.1016/j.cej.2015.06.074

Cited by 51 publications

(34 citation statements)

References 65 publications

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“…Fig. 1 shows that the size of the polymer particles decreased and the thickness of the walls increased as the TiO 2 concentration increased from 10 to 20 wbm% TiO 2 [26]. Fig.…”

Section: Bacterial Adhesion On Hybrid Filmsmentioning

confidence: 99%

“…The hybrid films were prepared by casting TiO 2 Pickering stabilized acrylic latexes (the synthesis of the hybrid latexes was described elsewhere [26]; briefly, p-benzene sulfonic acid modified TiO 2 was used as Pickering stabilizer in the miniemulsion polymerization of methyl methacrylate and n-butyl acrylate, the higher the loading of TiO 2 NPs in the formulation, the smaller the size of the polymer particles of the hybrid latex due to the higher stabilization area of the TiO 2 NPs; the size of the TiO 2 NPs was 25 nm).…”

Section: Films Preparation and Characterizationmentioning

confidence: 99%

“…Among the different techniques that can be used to produce these nanocomposite polymeric dispersions, miniemulsion polymerization has shown the highest success and versatility because hybrid polymer particles with complex morphologies can be tailored [19][20][21][22]. This technique is environmentally friendly and allows a better control of the NPs dispersion throughout the polymer matrix [23][24][25][26]. Among all the polymer/inorganic NPs hybrid morphologies that can be obtained by this method, Pickering stabilization allows obtaining a layer of NPs at the surface of the film after film formation.…”

Section: Introductionmentioning

confidence: 99%

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New evidence for hybrid acrylic/TiO2 films inducing bacterial inactivation under low intensity simulated sunlight

Bonnefond

González

Asúa

et al. 2015

Colloids and Surfaces B: Biointerfaces

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a b s t r a c tThis study addresses the preparation and characterization of hybrid films prepared from Titanium dioxide (TiO 2 ) Pickering stabilized acrylic polymeric dispersion as well as their bacterial inactivation efficiency under sunlight irradiation. Complete bacterial inactivation under low intensity simulated solar light irradiation (55 mW/cm 2 ) was observed within 240 min for the films containing 10 weight based on monomers (wbm) % of TiO 2 , whereas 360 min were needed for the films containing 20 wbm% of TiO 2. The hybrid films showed repetitive Escherichia coli (E. coli) inactivation under light irradiation. TiO 2 released from the films surfaces was measured by inductively coupled plasma mass spectrometry (IPC-MS), obtaining values of ∼0.5 and 1 ppb/cm 2 for the films containing 10 wbm% and 20 wbm% of TiO 2 , respectively, far below the allowed cytotoxicity level for TiO 2 (200 ppb). Transmission electron microscopy (TEM) of the hybrid films showed that TiO 2 nanoparticles (NPs) were located at the polymer particle's surface forming a continuous inorganic network inside the film matrix. Atomic force microscopy (AFM) images showed differences in the TiO 2 dispersion between the air-film and film-substrate interfaces. Films containing 10 wbm% of TiO 2 had higher roughness (Rg) at both interfaces than the one containing 20 wbm% of TiO 2 inducing an increase in the bacterial adhesion as well as the bacterial inactivation kinetics. The highly oxidative OH• -radicals participating in the bacterial inactivation were determined by fluorescence.

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“…Fig. 1 shows that the size of the polymer particles decreased and the thickness of the walls increased as the TiO 2 concentration increased from 10 to 20 wbm% TiO 2 [26]. Fig.…”

Section: Bacterial Adhesion On Hybrid Filmsmentioning

confidence: 99%

Section: Films Preparation and Characterizationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

New evidence for hybrid acrylic/TiO2 films inducing bacterial inactivation under low intensity simulated sunlight

Bonnefond

González

Asúa

et al. 2015

Colloids and Surfaces B: Biointerfaces

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“…This result is in agreement with the non-homogeneous distribution of the TiO2 NPs previously observed by SEM (Figure 1) and XPS ( Table 1). The kinetics of the degradation of Escherichia coli in the substrate-film interface is comparable, but clearly slower than in films produced from TiO2 nanoparticle Pickering-stabilized (meth)acrylic latexes [20,21]. …”

Section: Photocatalytic Waterborne Paintsmentioning

confidence: 79%

“…The presence of the photocatalytically active TiO 2 NPs at the surface of the paint, together with its higher roughness, are the keys to get a paint with good photocatalytic activity toward pollutant degradation [20,21].…”

Section: Before Testmentioning

confidence: 99%

Stable Photocatalytic Paints Prepared from Hybrid Core-Shell Fluorinated/Acrylic/TiO2 Waterborne Dispersions

et al. 2016

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Abstract:The contamination of air and water is one of the major concerns towards the development of a sustainable world in the 21st century. In this context many efforts are devoted to the design of photocatalytic paints able to degrade chemical and biological impurities present in air and water. In this work, the photocatalytic activity of hybrid films formed from the blends of pure acrylic or core/shell fluorinated/acrylic waterborne dispersions and photocatalytic titanium dioxide (TiO 2 ) nanoparticle dispersions was first assessed. The films show photocatalytic activity (inactivation of the Escherichia coli bacteria under UV irradiation) at the substrate-film interface, but very reduced activity in the air-film interface due to the substantially lower amount of the TiO 2 nanoparticles in the vicinity of this interface. In a second step, the fluorinated/(meth)acrylic core-shell hybrid dispersions were used as binders in the formulation of waterborne photocatalytic paints and the stability of the paints, in terms of gloss retain and color change, was assessed during 5000 hours of accelerated weathering tests (QUV-B). Although a decrease in gloss retention and increased color change occurs during the first 1000 hours of exposure, no further change of these properties takes place, which is an excellent indication of stable photocatalytic paints.

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Optical Coating Systems for High‐Efficiency Solar Cells

Bagade,

Malik,

Patel

2024

Functional Coatings for Biomedical, Energy, and Environmental Applications

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Photoactive self-cleaning polymer coatings by TiO2 nanoparticle Pickering miniemulsion polymerization

Cited by 51 publications

References 65 publications

New evidence for hybrid acrylic/TiO2 films inducing bacterial inactivation under low intensity simulated sunlight

New evidence for hybrid acrylic/TiO2 films inducing bacterial inactivation under low intensity simulated sunlight

Stable Photocatalytic Paints Prepared from Hybrid Core-Shell Fluorinated/Acrylic/TiO2 Waterborne Dispersions

Optical Coating Systems for High‐Efficiency Solar Cells

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