Synthesis and pigmental properties of titanium phosphates with the addition of urea

Onoda, Hiroaki; Yamaguchi, Taisuke; Takenaka, Atsushi

doi:10.1111/j.1468-2494.2011.00685.x

Cited by 21 publications

(30 citation statements)

References 20 publications

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“…All samples are in amorphous state according to XRD analyses. These results are the same as those prepared from titanium chloride [9]. Titanium phosphates are easy to form amorphous state in precipitation process.…”

Section: Methodssupporting

confidence: 76%

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Preparation of titanium phosphate white pigments with titanium sulfate and their powder properties

2014

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Abstract:Titanium oxide that has photocatalytic activity is used as white pigment for cosmetics. A certain degree of sebum on the skin is decomposed by the ultraviolet radiation in sunlight. In this work, as novel white pigment, titanium phosphates were synthesized with titanium sulfate and phosphoric acid for cosmetics. Their chemical composition, powder properties, photocatalytic activity, color phase, moisture retention, and smoothness were studied. These titanium phosphates had less photocatalytic activity to protect the sebum on the skin. Samples without heating and those heated at 100 ℃ showed high reflectance in the range of visible light. Sample prepared in Ti/P = 3/2 had higher moisture retention than samples prepared in other Ti/P ratios.

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Section: Methodssupporting

confidence: 76%

“…In earlier studies, we prepared a titanium phosphate pigment that has no catalytic activity with titanium chloride, TiCl 4 [8,9]. The obtained titanium phosphates have less photocatalytic activity to protect the sebum on the skin.…”

Section: Introductionmentioning

confidence: 99%

Preparation of titanium phosphate white pigments with titanium sulfate and their powder properties

2014

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“…Generally, sub-micrometer size pigments are used. In the earlier studies [6][7][8], we prepared titanium and zinc phosphate pigments with no catalytic activity. However, zinc phosphates had particle sizes larger than 1 µm [8]; therefore, a process to obtain small zinc phosphate particles is required.…”

Section: mentioning

confidence: 99%

Effect of mechanical treatment on the powder properties of zinc phosphate white pigments

Onoda

Haruki

2015

J Adv Ceram

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Abstract:Zinc oxide, which has photocatalytic activity, is used as a white pigment for cosmetics, resulting in a certain amount of sebum on the skin to be decomposed by the ultraviolet radiation in the sunlight. In this work, zinc phosphates as novel white pigments for use in cosmetics were prepared from zinc nitrate and sodium dihydrogen phosphate, and then ball-milled under various conditions. The chemical composition, powder properties, photocatalytic activity, color phase, moisture retention, and smoothness of the zinc phosphates were studied. The zinc phosphate particle size was decreased by mechanical treatment. In particular, the sample treated with sodium lactate solution had much smaller particles. The milled zinc phosphates exhibited less photocatalytic activity than zinc oxide, and thus should not decompose sebum on the skin. The milled zinc phosphates showed sufficiently high reflectance within the range of visible light to act as novel white pigments. The sample treated with sodium lactate solution had higher water retention than the sample treated with water. Further, the slip resistance and roughness of the powder particles decreased as a result of treatment with sodium lactate solution.

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“…In earlier studies [6][7][8], we prepared titanium and zinc phosphate pigments with no catalytic activity; these pigments comprised spherical, homogenous particles when prepared with additives. Herein, we attempt to control the particle size by addition of glycerin, sodium lactate, lactic acid, and urea to the system of phosphoric acid and titanium dioxide.…”

Section: Introductionmentioning

confidence: 99%

Influences of additives on phosphoric acid treatment of titanium dioxide as a novel white pigment

Matsukura

Onoda

2015

J Adv Ceram

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Titanium dioxide is a photocatalytically active substance used as a white pigment for cosmetics. In sunlight, titanium dioxide catalyzes decomposition of a certain amount of sebum on the skin by ultraviolet radiation. Herein, a novel white pigment for use in cosmetics was developed from titanium dioxide and phosphoric acid at pH = 4 with and without glycerin, sodium lactate, lactic acid, and urea. The chemical composition, powder properties, photocatalytic activity, color phase, and smoothness of the samples were studied. Addition of glycerin led to a decline in the intensity of the X-ray diffraction (XRD) peak of TiO 2 relative to that of the other samples. The particle size of the materials prepared with and without additives was 0.3 μm; however, extensive aggregation was observed in the obtained materials. The photocatalytic activity of TiO 2 was inhibited by phosphoric acid treatment. The materials prepared with sodium lactate, lactic acid, and glycerin exhibited higher photocatalytic activity than that prepared without additives.

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Synthesis and pigmental properties of titanium phosphates with the addition of urea

Cited by 21 publications

References 20 publications

Preparation of titanium phosphate white pigments with titanium sulfate and their powder properties

Preparation of titanium phosphate white pigments with titanium sulfate and their powder properties

Effect of mechanical treatment on the powder properties of zinc phosphate white pigments

Influences of additives on phosphoric acid treatment of titanium dioxide as a novel white pigment

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