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Ultraviolet shielding agent containing MnO2 nano sheet and its preparing and using method

A technology of ultraviolet shielding agent and manganese dioxide, which is applied in the direction of chemical instruments and methods, cosmetic preparations, skin care preparations, etc., to achieve good ultraviolet shielding performance, large layer spacing, and excellent performance

Inactive Publication Date: 2007-04-11
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore so far there is no bibliographical report using manganese dioxide or its nanosheets as an ultraviolet shielding agent

Method used

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  • Ultraviolet shielding agent containing MnO2 nano sheet and its preparing and using method
  • Ultraviolet shielding agent containing MnO2 nano sheet and its preparing and using method
  • Ultraviolet shielding agent containing MnO2 nano sheet and its preparing and using method

Examples

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Effect test

Embodiment 1

[0046] 200mL containing 0.6mol / L NaOH and 1.5mol / L H 2 O 2 The mixed solution was quickly added to 100mL containing 0.4mol / L Mn(NO 3 ) 2 solution, stirred and reacted for 30 minutes, filtered, transferred the filter cake to a 100mL polytetrafluoroethylene cup, added 40mL NaOH solution with a concentration of 2mol / L, stirred to form a paste, sealed the polytetrafluoroethylene cup in a hot water In the kettle, hydrothermal treatment was carried out at 160°C for 15 hours. After the hydrothermal kettle was naturally cooled to room temperature, the kettle was opened for suction filtration, and the filter cake was washed with deionized water until the pH value of the filtrate was 8. The filter cake was dried in an air atmosphere at 70° C. for 9 hours to obtain layered manganese dioxide.

[0047] Weigh 2.5g of layered manganese dioxide solid powder and add to 300mL of HNO with a concentration of 1.0mol / L 3 solution, stirred and reacted at room temperature for 3 days, during whic...

Embodiment 2

[0054] 200mL containing 0.8mol / L NaOH and 1.2mol / L H 2 O 2 The mixed solution was quickly added to 100mL containing 0.4mol / L Mn(NO 3 ) 2 solution, stirred and reacted for 20 minutes, filtered, transferred the filter cake to a 100mL polytetrafluoroethylene cup, added 35mL NaOH solution with a concentration of 3mol / L, stirred to form a paste, sealed the polytetrafluoroethylene cup in a hot water In the kettle, hydrothermal treatment was carried out at 150°C for 20 hours. After the hydrothermal kettle was naturally cooled to room temperature, the kettle was opened for suction filtration, and the filter cake was washed with deionized water until the pH value of the filtrate was 9. The filter cake was dried in an air atmosphere at 80° C. for 6 hours to obtain layered manganese dioxide.

[0055] Weigh 2.5g of layered manganese dioxide solid powder and add to 280mL of HNO with a concentration of 1.5mol / L 3 solution, stirred and reacted at room temperature for 3 days, during whic...

Embodiment 3

[0061] 200mL containing 0.62mol / L NaOH and 1.23mol / L H 2 o 2 The mixed solution was quickly added to 100mL containing 0.35mol / L Mn(NO 3 ) 2 solution, stirred and reacted for 25 minutes, filtered, transferred the filter cake to a 100mL polytetrafluoroethylene cup, added 40mL NaOH solution with a concentration of 3mol / L, stirred to form a paste, sealed the polytetrafluoroethylene cup in a hot water In the kettle, hydrothermal treatment was carried out at 160°C for 16 hours. After the hydrothermal kettle was naturally cooled to room temperature, the kettle was opened for suction filtration, and the filter cake was washed with deionized water until the pH value of the filtrate was 8. The filter cake was dried in an air atmosphere at 70° C. for 8 hours to obtain layered manganese dioxide.

[0062] Weigh 2.18g layered manganese dioxide solid powder and add to 250mL concentration of 1.5mol / L HNO 3 solution, stirred at room temperature for 5 days, during which a new 1.5mol / LHNO w...

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Abstract

The present invention belongs to the field of organic-inorganic composite material preparing technology, and is especially one new kind of ultraviolet shielding agent with nanometer MnO2 sheet and its preparation process and usage. The preparation process includes the first stripping laminated MnO2 and forming nanometer MnO2 sheet sol; and the subsequent self-assembling electrostatically with long chain alkyl quaternary ammonium salt cation to obtain the long chain alkyl quaternary ammonium salt cation-nanometer MnO2 sheet ultraviolet shielding agent. When the ultraviolet shielding agent is blended with polyolefin plastic through smelting, the long chain alkyl quaternary ammonium salt cation-nanometer MnO2 sheet with relatively great interval will be stripped under the action of high temperature and high shearing force and the nanometer MnO2 sheet will be distributed homogeneously in the plastic to exhibit excellent ultraviolet shielding performance.

Description

technical field [0001] The invention belongs to the technical field of organic-inorganic composite materials and their preparation, and in particular relates to a novel ultraviolet shielding agent containing manganese dioxide nanosheets and its preparation and use methods. Background technique [0002] Ultraviolet rays are electromagnetic waves with a wavelength of 180 to 400 nm. According to different wavelengths, ultraviolet rays are usually divided into three bands: long-wave ultraviolet (UVA) has a wavelength of 320-400nm, which can reach the dermis of the skin, gradually destroying the skin's elastic fibers and causing skin relaxation, and long-term exposure to UVA radiation Ultraviolet light (UVB) has a wavelength of 290-320nm, which mainly affects the surface of the skin, and can also cause fiber damage in the dermis, dilate the blood vessels in the skin, and turn the skin red. Blisters, hyperpigmentation, and severe skin cancer can lead to skin cancer; short-wave ul...

Claims

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Application Information

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IPC IPC(8): C09C3/00C09C1/00C08L23/06C08L25/06C08L27/06C08K3/22C08J5/18A61K8/19A61Q17/04
Inventor 杨文胜纪丽艳张熊
Owner BEIJING UNIV OF CHEM TECH
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