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Radiation cooling coating and preparation method thereof

A radiative cooling and coating technology, applied in the field of coatings, can solve the problems of increasing urban heat absorption and intensifying urban heat island effect, and achieve the effect of reducing heat island effect, excellent radiative cooling performance, and good corrosion resistance

Pending Publication Date: 2022-04-29
INST OF ADVANCED TECH UNIV OF SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the existing radiative cooling coatings reduce the solar radiation absorbed by the building surface through diffuse reflection, thereby reducing the temperature of the building surface, but the reflected solar radiation will irradiate the surrounding building surfaces, causing the buildings to be exposed to heat radiation multiple times. Absorption will not be reduced, and may even increase heat absorption in cities, which may lead to an increase in the urban heat island effect

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  • Radiation cooling coating and preparation method thereof
  • Radiation cooling coating and preparation method thereof

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preparation example Construction

[0040] Based on the above-mentioned purpose, the present invention also proposes a kind of preparation method of radiation cooling paint as mentioned above, combining figure 1 Said, in one embodiment, the preparation method comprises the following steps:

[0041] Step S10, mixing the polysiloxane resin and the solvent to obtain a mixed solution.

[0042] During specific implementation, under the condition of 250-350 r / min, the polysiloxane resin and the solvent are sequentially poured into the airtight container and stirred for 8-12 minutes, so as to mix them uniformly to obtain a mixed solution. Preferably, stir at 300r / min for 10min to make it evenly mixed.

[0043] Step S20 , adding reflective powder, fiber and hydrophobically modified silica into the mixed solution under stirring condition, and stirring to make it evenly mixed to obtain solution A.

[0044] During specific implementation, reflective powder, fibers and hydrophobically modified silica were added to the mix...

Embodiment 1

[0054] (1) The radiation cooling coating includes the following components in parts by weight: 5 parts of MQ silicone resin, 25 parts of 400-mesh reflective powder, 18 parts of hydrophobically modified silica with a particle size of about 1 μm, 1 part of aluminum silicate fiber, 48.75 parts of No. 200 solvent oil, 0.25 parts of curing agent; among them, hydrophobically modified silica is obtained by modifying PDMS with a particle size of 20nm, and then pulverized and sieved; the reflective powder is coated with aluminum on the second half of the surface glass beads with high refractive index.

[0055] (2) At 300r / min, pour polysiloxane resin and solvent into an airtight container and stir for 10 minutes to obtain a mixed solution; at 500r / min, add reflective powder, fiber and hydrophobic modification to the above mixed solution Silica, stirred for 30 min under airtight conditions, to obtain solution A. Add curing agent to the above solution A, and continue to stir for 5 minut...

Embodiment 2

[0057] (1) The radiation cooling coating includes the following components in parts by weight: 6 parts of MQ silicone resin, 20 parts of 400-mesh reflective powder, 20 parts of hydrophobically modified silica with a particle size of about 1 μm, 2 parts of aluminum silicate fiber, 48.7 parts of No. 200 solvent oil and 0.3 parts of curing agent; among them, the hydrophobically modified silica is the agglomerated powder of silicon dioxide with a particle size of 10nm modified by PDMS, and then crushed and sieved; the reflective powder is the second half High refractive index glass beads coated with aluminum.

[0058] (2) At 350r / min, pour polysiloxane resin and solvent into an airtight container and stir for 8 minutes to obtain a mixed solution; at 450r / min, add reflective powder, fiber and hydrophobic modification to the above mixed solution Silica, stirred for 35min under airtight conditions, to obtain solution A. Add the curing agent to the above solution A, and continue to s...

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Abstract

The invention discloses a radiation cooling coating and a preparation method thereof, and relates to the technical field of coatings. Wherein the radiation cooling coating comprises the following components in parts by weight: 5-7 parts of polysiloxane resin, 20-25 parts of reflective powder, 18-22 parts of hydrophobic modified silicon dioxide, 1-3 parts of fibers, 40-50 parts of a solvent and 0.25-0.7 part of a curing agent. In the technical scheme provided by the invention, the polysiloxane resin has good corrosion resistance, ultraviolet resistance and hydrophobicity, so that the service life of the radiation cooling coating is longer; meanwhile, the polysiloxane resin and the silicon dioxide have a large number of silicon-oxygen bonds and have absorption peaks in the wave band of 8-14 microns, so that the radiation rate is excellent, and through the synergistic effect of the polysiloxane resin and the silicon dioxide, the radiation cooling performance is excellent; the reflective powder has excellent retroreflection performance, and by adding the reflective powder, the absorbed sunlight can be retroreflected into extremely cold space, so that multiple reflections of the sunlight among urban high-rise buildings are effectively reduced, and the heat island effect is further reduced.

Description

technical field [0001] The invention relates to the technical field of coatings, in particular to a radiation cooling coating and a preparation method thereof. Background technique [0002] With the development of social economy and the continuous improvement of people's material level, building energy consumption is also increasing day by day. According to incomplete statistics, nearly half of the energy consumption of the whole society comes from the construction industry. In addition, the energy consumption of cooling equipment used in the world every year also reaches more than 20% of the total energy consumption. Moreover, "carbon peak" and "carbon neutrality" have become an important topic of great concern in today's society, and building energy conservation has become a hot spot in society. Radiant cooling coatings for building exterior walls have become an important direction for building energy conservation in hot summer areas in the south. . In the field of arch...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D183/04C09D5/33C09D7/62C09D7/61
CPCC09D183/04C09D5/004C09D7/62C09D7/61C09D7/70C08K2201/011C08K9/02C08K7/28C08K9/08C08K3/36C08K7/14C08K7/10C08K7/08
Inventor 戴舜赵汇智周天培吴长征谢毅
Owner INST OF ADVANCED TECH UNIV OF SCI & TECH OF CHINA
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