Kaolinite-loaded nano ZnO composite anti-ultraviolet agent and preparation method thereof
An anti-ultraviolet agent, kaolinite technology, applied in nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve problems such as poor dispersion, easy agglomeration, and easy delamination
Active Publication Date: 2020-06-12
CHENGDU UNIVERSITY OF TECHNOLOGY
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[0035] 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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[0081] Example 1: A kind of kaolinite-loaded nano-ZnO composite anti-ultraviolet agent and its preparation method
[0082] The natural flake mineral kaolinite is used as the carrier mineral raw material, and the kaolinite is relatively pure ( figure 1 ), the crystals are in the shape of irregular scales, and the size of the scales is 0.5 μm to 2 μm ( Figure 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 following 5 steps:
[0083] (1) Preparation of zinc sulfate heptahydrate-kaolinite mixture: press zinc sulfate heptahydrate (ZnSO 4 ·7H 2 O) and kaolinite mineral raw material mass ratio 2~5:1, take certain quality zinc sulfate heptahydrate and kaolinite mineral raw material powder respectively, and further grind and mix 30~40min, obtain zinc sulfate heptahydrate-kaolin stone mixture;
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Abstract
The invention relates to a kaolinite-loaded nano ZnO composite anti-ultraviolet agent and a preparation method thereof, wherein natural flaky mineral kaolinite is used as a carrier mineral raw material, and a room-temperature solid-phase synthesis method is adopted. The method comprises the steps: weighing, grinding and mixing materials according to a mass ratio of zinc sulfate heptahydrate to a kaolinite mineral raw material of 2-5:1 to prepare a zinc sulfate heptahydrate-kaolinite mixture; 2, weighing, grinding and mixing materials according to a molar ratio of zinc sulfate heptahydrate to sodium oxalate of (1-2):1 to prepare a precursor zinc oxalate-kaolinite mixture; 3, carrying out centrifugal washing by using a centrifugal washing device to remove impurities in the precursor zinc oxalate-kaolinite mixture; 4, drying the materials through a drying device at a drying temperature of 105 DEG C for 3-6 h; and 5, roasting the loaded dried material by using a roasting device at a heating rate of 10-15 DEG C / min and a roasting temperature of 400-550 DEG C, and keeping the temperature for 2-4 hours to obtain the kaolinite loaded nano ZnO composite anti-ultraviolet agent. The kaolinite-loaded nano ZnO composite anti-ultraviolet agent is obvious in effect, good in safety, simple in process, easy to popularize and apply, wide in application and remarkable in social and economic benefits.
Description
[0001] 1. Technical field [0002] The invention relates to a kaolinite-loaded nano-ZnO composite anti-ultraviolet agent and a preparation method thereof. The nano-ZnO is coated on the surface of kaolinite by a room-temperature solid-phase synthesis method to obtain a kaolinite-loaded nano-ZnO composite anti-ultraviolet agent. In the field of anti-ultraviolet materials or ultraviolet shielding materials. [0003] 2. Background technology [0004] 2.1 Ultraviolet concept [0005] Ultraviolet (UV for short) is an electromagnetic wave with a wavelength of 200nm to 400nm. The ultraviolet rays in sunlight can be divided into three sections according to different wavelengths: long-wave ultraviolet UVA (320-400nm), medium-wave ultraviolet UVB (280-320nm) and short-wave ultraviolet UVC (200-280nm). Appropriate sunlight 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 for...
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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