Anatase/brookite complex-phase titanium dioxide ultraviolet shielding agent and preparation method thereof

An ultraviolet shielding agent, titanium dioxide technology, applied in the direction of titanium dioxide, titanium oxide/hydroxide, nanotechnology, etc., can solve the problems of different crystal TiO2 ultraviolet shielding performance reports, insufficient ultraviolet absorption capacity, large amount of organic solvent, etc. Excellent UV shielding effect, achieving nanometer control, and the effect of no calcination

Inactive Publication Date: 2020-01-17
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method requires the use of expensive organic templates for TiO 2 The crystal form is controlled, the amount of organic solvent is also large, and the cost is high
And this method does not affect the obtained different crystal forms of TiO 2 UV shielding performance or its application in the field of UV shielding
[0008] For anatase TiO 2 Insufficient UV absorption capacity, rutile TiO 2 Nanometerization is difficult and opaque, while brookite TiO 2 The problem that the cost of pure phase synthesis is too high, the present invention will TiO 2 Two low-temperature metastable phases with different shielding properties are effectively recombined to propose an anatase / brookite TiO 2 The preparation method of multi-phase ultraviolet shielding agent

Method used

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  • Anatase/brookite complex-phase titanium dioxide ultraviolet shielding agent and preparation method thereof
  • Anatase/brookite complex-phase titanium dioxide ultraviolet shielding agent and preparation method thereof

Examples

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Effect test

Embodiment 1

[0020] Weigh 10ml of butyl titanate, add 16ml of triethanolamine solvent to it, fully stir on a magnetic stirrer for 30 minutes to make it fully dispersed, then weigh 1.17g of NaCl and add it to 100ml of distilled water to prepare 0.2mol / l NaCl The solution was stirred for 30 minutes on a magnetic stirrer. Slowly add the dispersed 25ml NaCl solution into the prepared butyl titanate organic solvent system, so that Ti 4+ The concentration is about 1mol / L. After being fully dispersed on a magnetic stirrer for 1 hour, the prepared solution was added to a polytetrafluoroethylene reaction kettle, subjected to hydrothermal reaction at 160°C for 24 hours, and centrifuged and washed after the sample was cooled. Dry the centrifuged product at 100°C. Finally, after grinding for 3 minutes with a mortar, an anatase / brookite titanium dioxide inorganic ultraviolet shielding agent was obtained. The UV-Vis transmission spectrum analysis of the sample shows that it can shield 70% of UVA and ...

Embodiment 2

[0022] Weigh 10ml of butyl titanate, add 8ml of triethanolamine solvent to it, fully stir on a magnetic stirrer for 30ml minutes to make it fully dispersed, then weigh 5.85g of NaCl and add it to 100ml of distilled water to prepare a 1mol / l NaCl solution After stirring for 30 min on a magnetic stirrer. Slowly add the dispersed 50ml NaCl solution into the prepared butyl titanate organic solvent system, so that Ti 4+ The concentration is around 0.5mol / L. After being fully dispersed on a magnetic stirrer for 1 hour, the prepared solution was added to a polytetrafluoroethylene reactor, and subjected to a hydrothermal reaction at 180°C for 24 hours. After the sample was cooled, it was centrifuged and washed. Dry the centrifuged product at 100°C. Finally, after grinding for 3 minutes with a mortar, an anatase / brookite titanium dioxide inorganic ultraviolet shielding agent was obtained. The content of brookite reaches 30%. The UV-Vis transmission spectrum analysis of the sample s...

Embodiment 3

[0024] Weigh 10ml of butyl titanate, add 2ml of triethanolamine solvent to it, fully stir for 30ml on a magnetic stirrer to fully disperse it, and then weigh 21.25g of NaNO 3 Add to 100ml distilled water to prepare 2.5mol / l NaNO 3 The solution was stirred for 30 minutes on a magnetic stirrer. The dispersed 100mlNaNO 3 The solution was slowly added to the prepared butyl titanate organic solvent system, so that Ti 4+ The concentration is around 0.25mol / L. After being fully dispersed on a magnetic stirrer for 1 hour, the prepared solution was added to a polytetrafluoroethylene reactor, and hydrothermally reacted at 160°C for 30 hours. After the sample was cooled, it was centrifuged and washed. Dry the centrifuged product at 100°C. Finally, after grinding for 3 minutes with a mortar, an anatase / brookite titanium dioxide inorganic ultraviolet shielding agent was obtained. An anatase / brookite titanium dioxide inorganic UV shielding agent was obtained. Then carry out UV-Vis tra...

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Abstract

The invention relates to an anatase/brookite complex-phase titanium dioxide ultraviolet shielding agent and a preparation method thereof, and belongs to the technical field of novel inorganic materials. According to the invention, the ultraviolet shielding performances of different phases of titanium dioxide are fully utilized, and in a hydrothermal synthesis system of titanium alkoxide, the anatase/brookite complex-phase titanium dioxide ultraviolet shielding material is prepared by using cheap inorganic sodium salt as a crystal form guiding agent, so that the defects of poor light scatteringand poor reflection of the anatase type titanium dioxide ultraviolet region are overcome, and the visible light transmission effect of the composite shielding agent is guaranteed; with the method, the ratio of the anatase type TiO2 to the brookite type TiO2 in the complex-phase shielding agent can be controlled by adjusting the dosage of the crystal form guiding agent, so that the working performances of the shielding agent in UVA and UVB sections can be adjusted as required; and the grain growth of TiO2 can be inhibited by utilizing the interaction between different crystalline phase grainsof the complex-phase TiO2 so as to successfully achieve the nanocrystallization control of TiO2, so that the excellent performance of the obtained ultraviolet shielding agent is guaranteed.

Description

technical field [0001] The invention relates to an anatase / brookite multiphase titanium dioxide ultraviolet shielding agent and a preparation method thereof, belonging to the technical field of novel inorganic ultraviolet shielding materials. Background technique [0002] According to the wavelength of sunlight, it is generally divided into three bands, UVC (200-280nm), UVB (280-320nm), and UVA (320-400nm). Among them, UVB and UVA are more harmful to human health, and long-term ultraviolet light will also rapidly degrade the strength and color of textiles and polymer coatings. Therefore, the preparation of polymer materials and clothing for outdoor use all need the protection of ultraviolet shielding agents. UV shielding agents can be divided into inorganic and organic UV shielding agents. Common inorganic UV shielding materials mainly include metal oxides (titanium dioxide, zinc oxide, tin oxide, cerium oxide), carbon black, and talcum powder. Compared with other UV inhib...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G23/053B82Y30/00D06M10/06D06M11/46D06M101/06
CPCB82Y30/00C01G23/053C01P2002/72D06M10/06D06M11/46D06M2101/06D06M2200/25
Inventor 李芳菲张佳浩薛兵董智强张立功于春生刘嘉晋高彬徐志强韩伟民
Owner JILIN UNIV
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