A kind of kaolinite-loaded nano-ZnO composite anti-ultraviolet agent and preparation method thereof
An anti-ultraviolet agent, kaolinite technology, applied in the direction of nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve the problems of poor dispersion, easy agglomeration, easy delamination, etc., and achieve high permeability efficiency, reunion solution, and work convenience
Active Publication Date: 2022-08-05
CHENGDU UNIVERSITY OF TECHNOLOGY
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[0032] The purpose of the present invention is to prepare a composite anti-ultraviolet agent or ultraviolet shielding material by loading nano-ZnO with the natural flake mineral kaolinite with layered structure as raw material, so as to overcome the easy aggregation and separation of existing nano-ZnO. Improve the sun protection and UV shielding performance, improve the aesthetic effect, prevent whitening, improve the use efficiency and reduce the use cost
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example 1
[0076] Example 1: A kind of kaolinite-loaded nano-ZnO composite anti-ultraviolet agent and preparation method thereof
[0077] Taking natural flaky mineral kaolinite as carrier mineral raw material, the kaolinite is relatively pure ( figure 1 ), the crystals are irregular scales, and the scales are 0.5 μm to 2 μm ( Image 6 a), its chemical composition is as shown in table 3, adopts room temperature solid-phase synthesis method to prepare kaolinite-loaded nano-ZnO composite anti-ultraviolet agent, and its preparation process is carried out according to the following 5 steps:
[0078] (1) Preparation of zinc sulfate heptahydrate-kaolinite mixture: according to zinc sulfate heptahydrate (ZnSO 4 ·7H 2 O) and the kaolinite mineral raw material mass ratio of 2~5:1, respectively weigh a certain quality of zinc sulfate heptahydrate and kaolinite mineral raw material powder, and further grind and mix for 30~40min to obtain zinc sulfate heptahydrate-kaolin stone mixture;
[0079] (...
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Abstract
The invention relates to a kaolinite-supported nano-ZnO composite anti-ultraviolet agent and a preparation method thereof. The natural flaky mineral kaolinite is used as a carrier mineral raw material, and a solid-phase synthesis method at room temperature is adopted. The mass ratio of lingstone mineral raw materials is 2~5:1 to weigh and grind the mixed material to prepare the zinc sulfate heptahydrate-kaolinite mixture; the second is to weigh and grind the mixture according to the molar ratio of zinc sulfate heptahydrate and sodium oxalate of 1~2:1. Grinding the mixed material to prepare the precursor zinc oxalate-kaolinite mixture; the third is to use a centrifugal washing device to remove impurities in the precursor zinc oxalate-kaolinite mixture; the fourth is to use a drying device to dry the material, drying The drying temperature is 105°C, and the drying time is 3h-6h; the fifth is to use a roasting device to roast the load-dried material, the heating rate is 10°C-15°C / min, the roasting temperature is 400°C-550°C, and the temperature is kept for 2h-4h. Lingstone-loaded nano-ZnO composite anti-ultraviolet agent. The effect is obvious, the safety is good, the process is simple, the popularization and application are easy, the use is wide, and the social and economic benefits are remarkable.
Description
1. Technical field [0001] The invention relates to a kaolinite-loaded nano-ZnO composite anti-ultraviolet agent and a preparation method thereof. The surface of kaolinite is coated with nano-ZnO by a solid-phase synthesis method at room temperature to obtain a kaolinite-loaded nano-ZnO composite anti-ultraviolet agent, which is suitable for In the field of anti-ultraviolet materials or ultraviolet shielding materials. 2. Background technology [0002] 2.1 UV Concept [0003] Ultraviolet (Ultraviolet, UV for short) is an electromagnetic wave with a wavelength of 200 nm to 400 nm. Ultraviolet rays in sunlight can be divided into long-wave ultraviolet UVA (320-400nm), medium-wave ultraviolet UVB (280-320nm) and short-wave ultraviolet UVC (200-280nm) according to different wavelengths. Appropriate sunlight exposure can increase the oxygen content of the body's cells, reduce blood sugar and cholesterol levels, and enhance human vitality. However, excessive exposure to the sun ...
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IPC IPC(8): A61K8/26A61K8/27A61Q17/04B82Y30/00B82Y40/00C01G9/02
CPCA61K8/26A61K8/27A61Q17/04C01G9/02B82Y30/00B82Y40/00
Inventor 汪灵梁唯丛董秋冶
Owner CHENGDU UNIVERSITY OF TECHNOLOGY