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Adjustable-color high near infrared reflectivity type composite organic pigment and preparation method thereof

An inorganic pigment and near-infrared technology, applied in the direction of inorganic pigment treatment, chemical instruments and methods, fibrous fillers, etc., can solve the problems of the adjustment, transition and change of the color of inorganic cold pigments, and achieve a wide range of color adjustment Effect

Active Publication Date: 2019-06-21
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The present invention aims to solve the problem that existing inorganic cold colorants cannot realize color adjustment, transition and change in the same formula system

Method used

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  • Adjustable-color high near infrared reflectivity type composite organic pigment and preparation method thereof
  • Adjustable-color high near infrared reflectivity type composite organic pigment and preparation method thereof
  • Adjustable-color high near infrared reflectivity type composite organic pigment and preparation method thereof

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preparation example Construction

[0061] A kind of preparation method of the high near-infrared reflectance composite inorganic pigment with adjustable color provided by the invention comprises the following steps (refer to image 3 ):

[0062] S1. Weigh the raw material of hollow glass microspheres, add them into NaOH solution under a specific ultrasonic treatment state to carry out surface erosion treatment, and obtain a suspension.

[0063] In the step S1, in terms of mass percentage, the particle gradation of the hollow glass microsphere raw material is: <10 μm accounts for 2-10%, 10-30 μm accounts for 70%, and 30-60 μm accounts for 20-28%; The concentration of the NaOH solution is 1.5-2.75mol / L; the mass volume ratio between the hollow glass microspheres and the NaOH solution is 20-35:1g / L; the ultrasonic amplitude in the ultrasonic treatment state is 20- 80%, the ultrasonic frequency is 20-40KHz, the ultrasonic method is intermittent ultrasonic, stop for 2-4min after ultrasonic for 0-5min, then ultrasoni...

Embodiment 1

[0075] Preparation of high near-infrared reflectance composite inorganic pigment, the composite inorganic pigment is ZnS 0.35 Se 0.65 Coated hollow glass microspheres (Cu / In doping amount is 0), the visual color is light yellow, the optical bandgap energy width is 2.90eV, and the optical absorption edge is 439nm. The preparation method is as follows:

[0076] (1) In terms of mass percentage, the particle gradation is: 0-10 μm accounts for 5%, 10-30 μm accounts for 70%, and 30-60 μm accounts for 25% of the hollow glass microsphere raw material 35g (the hollow glass microsphere Morphological reference of bead raw material under scanning electron microscope Figure 1a ), under the sonochemical treatment reaction conditions that the total ultrasonic power is 1000W, the amplitude is 25%, the ultrasonic frequency is 20KHz, and 5min-2min intermittent ultrasonic (the total ultrasonic time is 17min, 2min is stopped after ultrasonic 5min, and then ultrasonic 5min), Adding to 1L of Na...

Embodiment 2

[0086] Preparation of high near-infrared reflectance composite inorganic pigment, the composite inorganic pigment is ZnS 0.35 Se 0.65 : Cu / In coated hollow glass microspheres, Cu / In is the doping element, the doping method is co-doping, the doping amount is 1.0% (atomic ratio), the visual color is reddish orange, the optical bandgap energy width is 2.59eV, and the optical absorption edge is 524nm. The preparation method is as follows:

[0087] (1) In terms of mass percentage, the particle gradation is: 0-10 μm accounts for 10%, 10-30 μm accounts for 70%, and 30-60 μm accounts for 20% of the hollow glass microsphere raw material 25g (the hollow glass microsphere Morphological reference of bead raw material under scanning electron microscope Figure 1a ), under the sonochemical treatment reaction conditions that the total ultrasonic power is 1000W, the amplitude is 45%, the ultrasonic frequency is 40KHz, and the intermittent ultrasonic is 3min-4min (the total ultrasonic time ...

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Abstract

The invention discloses an adjustable-color high near infrared reflectivity type composite organic pigment and a preparation method thereof. The preparation method comprises the following steps: adding glass beads into a NaOH solution to obtain a suspension; preparing a salt solution through Zn<2+>, Cu<2+> and other soluble salts; adding metal Se to the NaOH solution; then adding negative ion which is a S2-compound solution to obtain a mixture solution; adding the salt solution and the mixture solution to the suspension; filtering; collecting precipitate; grinding and precipitating; and thermally processing to obtain the composite inorganic pigment. The composite inorganic pigment is ZnSxSe1-x: Cu / In covered hollow glass bead type composite material. The material is provided with a core-shell structure with high scattering performance, and a plurality of light rays can be absorbed. According to the method, x, doping content and atom ratio are changed, so that the visual colors of thecomposite inorganic pigment include white, pale yellow, luminous yellow, bright orange and other colors.

Description

technical field [0001] The invention relates to the technical field of composite inorganic pigments, in particular to a color-adjustable composite inorganic pigment with high near-infrared reflectivity and a preparation method thereof. Background technique [0002] Nowadays, the issue of global warming has received more and more attention. Due to the acceleration of urbanization, the heat emitted by large cities can reach 2 / 5 of the solar energy received, and the energy consumption of large cities has significantly aggravated the urban heat island effect. Based on urgent resource needs and environmental protection issues, some "cool materials" with high solar reflectivity have become a research hotspot. Using cool materials with high near-infrared reflectivity to building shells (roofs and walls) and other surfaces in urban environments can reduce solar energy absorption by houses, allowing buildings to stay cool in the sun. [0003] Solar radiation consists of 5% ultravio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09C1/04C09C3/06
Inventor 潘志东张缇王燕民
Owner SOUTH CHINA UNIV OF TECH
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