Method for preparing solar selective heat-absorbing coating with spinel pigment as light-absorbing agent

A spinel-type, heat-absorbing coating technology, which is applied in the direction of radiation-absorbing coatings, polyurea/polyurethane coatings, coatings, etc., can solve the problems of not examining the influence of powder structure and performance, affecting product structure and optical properties, etc. Achieve the effect of improving light-to-heat conversion efficiency, good mechanical properties, and simple and controllable process
CN102286243AActive Publication Date: 2011-12-21LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
Publication Date
2011-12-21

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Abstract

The invention relates to a method for preparing a solar selective heat absorbing paint by using a spinel type pigment as a light absorbent, which belongs to the field of solar heat utilization. The method comprises the steps of uniformly dispersing a nanoscale spinel type pigment as well as resin, a solvent and auxiliaries by using a ball milling method; and then adding a curing agent to obtain the solar selective heat absorbing paint. It is shown in the experiment that the paint is uniformly coated on a metal substrate by using a spraying method; and the solar selective heat absorbing paint obtained after being cured at room temperature shows higher solar energy absorption rate (0.93-0.95) and lower emissivity (0.18-0.30); and the photothermal conversion efficiency of a solar heat collector can be effectively improved; moreover, the coating has the advantages of good mechanical property, stronger weather resistance and service life of more than 45 years.
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Description

technical field

[0001] The invention relates to a solar selective heat-absorbing paint with a spinel pigment as a light-absorbing agent and a preparation method thereof, belonging to the field of solar heat utilization. Background technique

[0002] The deterioration of the human living environment and the increasing shortage of energy are two major problems facing the world today. The use of new renewable energy is the fundamental way to solve the above problems. Among them, solar energy is clean, inexhaustible and inexhaustible. Become the first choice for new energy. The solar selective absorbing coating has a high absorption rate (α) for the radiation in the visible and near-infrared range of the sun, while its own infrared radiation rate is low, that is, it has a low emissivity (ε), which is the key to solar thermal utilization technology technology, which is crucial to improving collector efficiency.

[0003] Selective endothermic coatings can be prepared by a variet...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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