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A kind of blue pigment with high near-infrared reflectivity and preparation method thereof

A technology of blue pigment and infrared reflection, applied in the direction of inorganic pigment treatment, chemical instruments and methods, fibrous fillers, etc., can solve the problems of uneven particle distribution, high firing temperature, and environmental pollution, and achieve low calcining temperature, Strong color development ability, fine particle effect

Active Publication Date: 2021-04-02
山东国瓷康立泰新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, most of the existing near-infrared reflective pigments are prepared by the solid-phase method, which has defects such as high firing temperature and uneven particle distribution, while the co-precipitation method produces a large amount of waste liquid in the manufacturing process and pollutes the environment.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0025] A kind of preparation method of high near-infrared reflectivity blue pigment, it comprises the following steps:

[0026] Step 1. Preparation of the first suspension: dissolve polyvinylpyrrolidone in deionized water at a mass percentage of 1% to 6%, and stir with a magnetic stirrer for 15min to 30min to obtain the first solution, and then mix the rutile titanium dioxide powder Add it to the first solution at a mass percentage of 5% to 45%, and stir it with a magnetic stirrer for 15 minutes to 40 minutes, then move it to an ultrasonic disperser and ultrasonically for 15 minutes to 45 minutes to form a stable and uniform first suspension;

[0027] Step 2, preparing the second suspension: taking by weighing cobalt nitrate hexahydrate and aluminum nitrate nonahydrate as oxidant according to the stoichiometric ratio, taking soluble organic matter as reducing agent, then mixing cobalt nitrate hexahydrate, aluminum nitrate nonahydrate and soluble organic matter Dissolve in the ...

Embodiment 1

[0032] A kind of preparation method of high near-infrared reflectivity blue pigment, it comprises the following steps:

[0033] Step 1. Preparation of the first suspension: dissolving polyvinylpyrrolidone at 1% by mass in deionized water, and stirring with a magnetic stirrer for 15 minutes to obtain the first solution, and then dissolving the rutile titanium dioxide powder at 2% by mass % was added to the first solution, and stirred with a magnetic stirrer for 15 minutes, then moved to an ultrasonic disperser for ultrasonication for 20 minutes to form a stable and uniform first suspension;

[0034] Step 2, preparing the second suspension: introducing and weighing cobalt nitrate hexahydrate and aluminum nitrate nonahydrate as oxidant according to the stoichiometric ratio of 100%, taking soluble organic matter as reducing agent, and then mixing cobalt nitrate hexahydrate, aluminum nitrate nonahydrate and All soluble organic matter was dissolved in the first suspension obtained i...

Embodiment 2

[0040] A kind of preparation method of high near-infrared reflectivity blue pigment, it comprises the following steps:

[0041] Step 1. Prepare the first suspension: dissolve polyvinylpyrrolidone at 1.5% by mass in deionized water, and stir for 15 minutes with a magnetic stirrer to obtain the first solution, and then mix the rutile titanium dioxide powder with 3.5% by mass % was added to the first solution, and stirred with a magnetic stirrer for 20 minutes, then moved to an ultrasonic disperser for ultrasonication for 23 minutes to form a stable and uniform first suspension;

[0042] Step 2, preparing the second suspension: taking by weighing cobalt nitrate hexahydrate and aluminum nitrate nonahydrate as oxidant according to the stoichiometric ratio, taking soluble organic matter as reducing agent, then mixing cobalt nitrate hexahydrate, aluminum nitrate nonahydrate and soluble organic matter Dissolve in the first suspension obtained in step 1, stir for 40 minutes and mix to ...

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Abstract

The invention relates to the technical field of inorganic functional pigments, in particular to a blue pigment with high near-infrared reflectivity and a preparation method thereof. The preparation method comprises the following steps: step 1, preparing a first suspension; step 2, preparing a second suspension; step 3, conducting combustion reaction; and step 4, conducting calcining. According tothe preparation method, rutile titanium dioxide with high near infrared reflectivity is taken as an inner core, a cobalt blue pigment synthesized by adopting a combustion method is attached to the surface of the rutile titanium dioxide to form an outer core, generated pigment particles are fine by utilizing a combustion reaction, and the pigment particles are attached to the surface of the rutiletitanium dioxide to form the blue pigment with high near infrared reflectivity. The preparation method has the advantages of being low in combustion reaction temperature, energy-saving, environment-friendly and high in operability, the color shade of the pigment can be regulated and controlled by adjusting the molar ratio of titanium ions to cobalt ions, and the prepared blue pigment with the highnear infrared reflectivity has the advantages of being small in particle size, uniform in distribution and high in color development capacity.

Description

technical field [0001] The invention relates to the technical field of inorganic functional pigments, in particular to a blue pigment with high near-infrared reflectivity and a preparation method thereof. Background technique [0002] Solar radiation consists of 5% ultraviolet radiation, 43% visible radiation and 52% near infrared radiation. Common building roofs can only reflect 10-20% of solar radiation, resulting in high indoor cooling costs. If 60% of solar radiation is reflected, more than 20% of high-temperature cooling energy will be saved. Therefore, the study of materials with high near-infrared reflectivity has certain significance for energy saving and environmental protection. [0003] At present, the material with the highest near-infrared reflectance is titanium dioxide, but titanium dioxide has problems such as single color, easy to get dirty, and light pollution; therefore, many institutions have begun to use solid-phase calcination or co-precipitation to p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09C1/36C09C3/06C09C3/04
CPCC09C1/363C09C1/3661C09C1/3692C09C3/006C09C3/043C09C3/063
Inventor 周军
Owner 山东国瓷康立泰新材料科技有限公司