Roles of anatase and rutile TiO2 nanoparticles in photooxidation of polyurethane

Chen, Xudong; Wang, Zhi; Liao, Zheng Fu; Liang, Yu; Zhang, Ming Qiu

doi:10.1016/j.polymertesting.2006.10.002

Cited by 131 publications

(64 citation statements)

References 18 publications

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“…Additionally, the UV-shielding ability of the rutile TiO 2 pigment was better than that of the anatase TiO 2 pigment because the former absorbed UV light up to 400 nm, while the latter only showed significant absorption up to 380 nm. Importantly, the rutile phase pigment was likely to show much lower apparent photoreactivity than the anatase phase pigment under the UV irradiation [17,25], suggesting that the rutile-based pigment can be used as stabilizer and effective UV absorber in the polymer coatings. FT-IR analysis FT-IR spectroscopy was applied to characterize TiO 2 surface groups.…”

Section: Uv-vis Spectra Analysismentioning

confidence: 99%

Consideration of roles of commercial TiO2 pigments in aromatic polyurethane coating via the photodegradation of dimethyl toluene-2,4-dicarbamate in non-aqueous solution

Zhou

Xiao

et al. 2015

Res Chem Intermed

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Dimethyl toluene-2,4-dicarbamate (2,4-TDC) was selected as a model compound for aromatic polyurethane to investigate the photo-chemical behavior of commercial TiO 2 pigments in non-aqueous solution. The UV-Visible spectrometry analysis results showed that the UV-shielding ability of the rutile TiO 2 pigment was better than that of the anatase TiO 2 pigment. Photodegradation experiments suggested that the photodegradation of 2,4-TDC was retarded by rutile TiO 2 pigment, while accelerated by anatase TiO 2 pigment. With the help of the degradation intermediates during the photodegradation process and calculated data, such as point charges and bond length, the preliminary photodegradation mechanism of 2,4-TDC was also briefly elucidated, including the addition of hydroxyl radicals and the cleavage of the carbamate side chain. Additionally, the photodegradation of 2,4-TDC was used to evaluate the photoreactivity of TiO 2 pigments, this is proved to an efficient approach with potential application in industry.

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Section: Uv-vis Spectra Analysismentioning

confidence: 99%

Consideration of roles of commercial TiO2 pigments in aromatic polyurethane coating via the photodegradation of dimethyl toluene-2,4-dicarbamate in non-aqueous solution

Zhou

Xiao

et al. 2015

Res Chem Intermed

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“…The hydroxyl radicals and active oxygen species formed attack the C-H bond in the polymer chain to form the carbonyl group [26]. showed that the crystal structure also plays an important role as anatase TiO 2 nanoparticles were intrinsically more photo-catalytically active than rutile TiO 2 nanoparticles in photo-oxidative degradation of polyurethane [27]. A possible explanation for our results is that during the first 100 h TiO 2 particles led to an increase of the efficiency of the photo-oxidative degradation of nylon, which slowed down after the loss of TiO 2 .…”

Section: Fourier-transform Infrared Spectroscopymentioning

confidence: 99%

Exploring the Use of Unprocessed Waste Chicken Eggshells for UV-Protective Applications

2017

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Photodegradation causes a steady loss of the useful physical, mechanical and optical properties of materials, necessitating their replacement over time. Because UV (Ultraviolet) light is most harmful in this regard, many materials now contain UV-protective additives. However, these additives are not always effective and durable, can be expensive, and their natural extraction or synthetic production can be harmful to the environment. Here, we investigated the use of unprocessed chicken eggshells in providing UV protection to two commonly used synthetic polymers: polystyrene and nylon. We show that unprocessed chicken eggshells provide a durable and effective UV protection. Our data sets the stage for future research to find a practical way to use the large amounts of unprocessed chicken eggshell waste as novel, economically appealing and environmentally friendly UV-protective additives.

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“…Changes of the nanoparticulate surface, which may be introduced to achieve a better performance of nanocomposites e.g. [45][46][47][48], may in turn affect hazard. All in all, amorphous SiO 2 and TiO 2 nanoparticles can be hazardous, with actual hazard to a considerable extent dependent on surface characteristics and in case of TiO 2 also on crystal structure.…”

Section: Introductionmentioning

confidence: 99%

“…In this study it was found that though degradation of the nanocomposite during recycling occurred, mechanical properties remained significantly better than those of the neat polymer. More in general one might expect that the oxidative properties of titania and silica nanoparticles are conducive to polymer degradation and will increase thermal degradation over the level occurring in neat polymer when recycling involves heating [45,52,53].…”

Section: Introductionmentioning

confidence: 99%

Application of Acrylonitrile Butadiene Rubber for Management of Industrial Waste Silica

Toony¹

2012

J Material Sci Engg

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Roles of anatase and rutile TiO2 nanoparticles in photooxidation of polyurethane

Cited by 131 publications

References 18 publications

Consideration of roles of commercial TiO2 pigments in aromatic polyurethane coating via the photodegradation of dimethyl toluene-2,4-dicarbamate in non-aqueous solution

Consideration of roles of commercial TiO2 pigments in aromatic polyurethane coating via the photodegradation of dimethyl toluene-2,4-dicarbamate in non-aqueous solution

Exploring the Use of Unprocessed Waste Chicken Eggshells for UV-Protective Applications

Application of Acrylonitrile Butadiene Rubber for Management of Industrial Waste Silica

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