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Application of diamine compound containing thiazole ring in preparing solar heat-absorbing coating

A technology of solar energy absorption and amine compounds, applied in the field of solar energy, can solve problems such as poor solubility, influence of polyimide performance, optical performance attenuation, etc., and achieve improved weather resistance and adhesion, good mechanical properties and weather resistance, high Effect of light-to-heat conversion efficiency

Inactive Publication Date: 2014-05-14
LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Since the working cycle of light-to-heat conversion coatings is between high temperature and low temperature, the use of ethylene-propylene emulsion modified emulsified asphalt will cause poor aging performance of such coatings and coatings, and sharp attenuation of optical properties
Chinese patent ZL 201310277614.X uses the heteropolymeric modified silica sol of active silicic acid composite water glass as a binder to prepare solar heat-absorbing coatings. Since the silica sol is in a quasi-stable state, it is easy to transform into a gel to enable light-to-heat conversion. The poor suspension of the coating further causes the large-scale agglomeration of light-absorbing pigments, which drastically affects the application prospects of light-to-heat conversion coatings
Although Chinese patent ZL201010570075.5 discloses the use of modified polyimide resin as an organic film-forming agent to prepare medium and high temperature solar selective absorption coatings and coatings, it does not specify the specific molecular structure of the polyimide resin used, but for As is well known to professional and technical personnel, the structure of the main chain of the molecule has a significant impact on the performance of polyimide
For example, the previous polyimides have poor solubility due to their rigid molecular structure. In order to improve the solubility of polyimides, the known method is to introduce flexible groups or asymmetric structures into the molecular structure of polymerized monomers. , so as to increase the flexibility of the polymer molecular chain to improve its solubility. Such groups include -O-, -S-, etc.

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0029] 1. Preparation of polyimide resin: under the protection of Ar gas, weigh 10 mmol of thiazole ring-containing diamine monomer 2-amino-5-[4-(4'-aminophenoxy)phenyl] -Thiazole and commercially available dianhydride monomer 3,3',4,4'-diphenyl ether tetracarboxylic dianhydride (ODPA) 10 mmol were added to a 250mL three-necked reaction flask, and NMP (N-methylpyrrolidone) was added to make The solid content of the reaction system is between 10% and 15%. After reacting for 24 hours, a polyamic acid solution was obtained. Then add a mixed solution of 7 mmol acetic anhydride and 7 mmol pyridine, stir at room temperature for 0.8 h, and react at 100°C for 3 h. The solution was poured into excess methanol to obtain a white resin precipitate, which was washed several times with methanol and hot water, then put into a vacuum drying oven at 40° C. and dried overnight to obtain a polyimide resin.

[0030] 2. Preparation of coating: 15 parts of CuCr 2 o 4 Powder, 5 parts of thiazole...

Embodiment 2

[0033] 1.1. Preparation of thiazole ring-containing polyimide resin: under the protection of Ar gas, weigh 6 mmol of thiazole ring-containing diamine monomer 2-amino-5-[4-(4'-aminophenoxy Base) phenyl]-thiazole and commercially available dianhydride monomer pyromellitic dianhydride (PMDA) 6 mmol in a 250mL three-necked reaction flask, add DMAc (N, N - dimethylacetamide) to make the reaction system The solid content is between 10 and 15%. After reacting for 24 hours, a polyamic acid solution was obtained. Then add a mixed solution of 6.3 mmol acetic anhydride and 6.3 mmol pyridine, stir at room temperature for 1 h, then 150 o C reacted for 3h. Pour the solution into excess methanol to obtain a white resin precipitate, wash it with methanol and hot water several times, and put it in a vacuum oven for 40 o C was dried overnight to obtain a polyimide resin.

[0034] 2. Preparation of coating: 40 parts of CoMnCuO x The powder, 10 parts of thiazole ring-containing polyimide res...

Embodiment 3

[0037] 1. Preparation of thiazole ring-containing polyimide resin: under the protection of Ar gas, weigh 15 mmol of thiazole ring-containing diamine monomer 2-amino-5-[4-(4'-aminophenoxy )phenyl]-thiazole and commercially available dianhydride monomer 3,3',4,4'-benzophenone tetracarboxylic dianhydride (BTDA) 15 mmol in a 250 mL three-necked reaction flask, add DMAc (N, N-dimethylacetamide), so that the solid content of the reaction system is between 10% and 15%. After reacting for 24 hours, a polyamic acid solution was obtained. Then add 20 mmol of acetic anhydride and 20 mmol of pyridine mixture (acetic anhydride as dehydrating agent, pyridine as catalyst), stir at room temperature for 0.5 h, then react at 50°C for 10 h. The solution was poured into excess methanol to obtain a white resin precipitate, which was washed several times with methanol and hot water, then put into a vacuum drying oven at 40° C. and dried overnight to obtain a polyimide resin.

[0038] 2. Preparati...

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Abstract

The invention provides an application of a diamine compound containing a thiazole ring in preparing a solar heat-absorbing coating. The application comprises the following steps: under protection of argon, dissolving the diamine compound containing the thiazole ring in an organic solvent, and then adding a dianhydride monomer or a derivative thereof to carry out the polymerization reaction to obtain polyimide resin containing the thiazole ring; then, mixing the polyimide resin containing the thiazole ring with a pigment and a solvent, and then ball-milling and uniformly dispersing to obtain the coating. Test results show that the adhesive force of the coating prepared by the solar heat-absorbing coating is 4-5B, the solar absorptivity is 0.80-0.85, and the emissivity is 0.11-0.39. Therefore, the coating has higher solar absorptivity and lower emissivity, and can effectively improve the photothermal conversion efficiency of a solar heat collector. The coating has good mechanical property and strong weather resistance, and can be widely applied to the field of utilization of solar energy at medium and low temperature.

Description

technical field [0001] The invention relates to the application of a thiazole ring-containing diamine compound, in particular to the application of a thiazole ring-containing diamine compound in preparing solar heat absorbing coatings, and belongs to the technical field of solar energy. Background technique [0002] The deterioration of the human living environment and the increasing shortage of energy are two major problems facing the world today. As the cleanest energy, the conversion and utilization of solar energy has been widely valued at home and abroad. Among them, solar thermal utilization is the most practical way of utilizing solar energy. The highest degree and the most closely integrated form with industrial and agricultural production. In the process of solar thermal utilization, the core technical component is the selective light-to-heat conversion coating. Among the various preparation methods of selective light-to-heat conversion coatings, black nickel and b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G73/10C09D179/08C09D7/12C09D5/32
Inventor 赵鑫刘刚耿庆芬
Owner LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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