Titanium oxide composite material with high reflection and heat insulation performance as well as preparation method and application of titanium oxide composite material

Abstract

The invention belongs to the field of preparation of functional pigments and fillers of reflective heat-insulation coatings, and relates to a titanium oxide composite material with high reflective heat-insulation performance and a preparation method and application thereof. Artificial microbeads are used as raw materials, titanium salt is used as a titanium source, and the artificial microbeads are dispersed into a water solvent to form uniform artificial microbead suspension liquid; and slowly dropwise adding a titanium source into the suspension, hydrolyzing at a certain temperature in a stirring state, and filtering to obtain the artificial microbead-titanium oxide composite material. According to the artificial microbead and titanium oxide composite material disclosed by the invention, by adjusting the surface structure and composition of the artificial microbeads and improving the hydrolysis nucleation site and acting force of titanium salt, the problems of non-uniform dispersion, untight contact and the like of titanium oxide on the surfaces of the artificial microbeads are effectively solved, the dosage of titanium oxide-based pigments and fillers is greatly reduced, and the reflective heat insulation capability is improved; the raw material cost is reduced; and the reflective heat insulation effect is more excellent.

Description

Technical Field

[0001] The present invention belongs to the field of preparation of functional pigments and fillers for reflective heat-insulating coatings, and particularly relates to a titanium oxide composite material. Background Art

[0002] With the rapid growth of global energy consumption and the promotion of the "carbon neutrality" goal, the development of highly energy-efficient materials has become a current research hotspot. Solar reflective heat-insulating materials reduce the absorption of heat energy by peripheral enclosure structures such as buildings by reflecting visible light and the near-infrared band (accounting for 90% of the total energy) in sunlight, and can significantly reduce the energy consumption of air conditioners in summer. According to statistics, the building operation energy consumption accounts for about 30% of the total social energy consumption in China, and the carbon dioxide emissions account for 20% of the total national carbon emissions. Therefore, reducing the solar radiation heat effect of building walls, doors and windows and other peripheral enclosure structures and improving their heat-insulating ability, and developing nearly zero-energy buildings are of great significance. Researchers at home and abroad coat the surface of building walls with reflective heat-insulating coatings to reflect infrared rays, reduce the heat accumulated on the surface of the peripheral enclosure structure when sunlight irradiates the building wall surface and the heat transferred from the wall to the room through heat conduction, thereby preventing the temperature inside the building from rising significantly.

[0003] Titanium dioxide has advantages such as high refractive index and high whiteness, and has become the most widely used reflective heat-insulating pigment and filler. However, the thermal conductivity of titanium dioxide is relatively high, and there is still heat on the surface of the peripheral enclosure structure diffusing into the building interior through heat conduction and other means, reducing the reflective heat-insulating effect of the coating. At the same time, due to the micro-nano size of titanium dioxide particles, a certain thickness of titanium oxide coated on the surface of the peripheral enclosure structure usually requires a large amount of titanium oxide materials to achieve a high reflective heat-insulating effect, resulting in problems such as a large amount of titanium oxide materials used, low resource utilization rate and high cost. Patent CN201811652324.8 discloses a preparation method of a titanium dioxide / hollow microsphere composite filler, which adopts an inverse microemulsion system and uses ultrasonic oscillation formed by small-band ultrasonic waves to slowly hydrolyze the organotitanium source at the oil / water interface, and can better coat the surface of the hollow microspheres, having a higher titanium dioxide film-forming effect, but there are problems such as complex preparation process, high cost and large production energy consumption.

[0004] As a kind of lightweight and high-strength functional filler, artificial microspheres are widely used in fields such as heat-insulating coatings and composite materials due to their unique hollow structure and low thermal conductivity. Traditional methods disperse artificial microspheres and titanium oxide materials into the coating matrix through physical mixing means, which can reduce the dosage of titanium oxide materials and to a certain extent reduce the thermal conductivity of pigments and fillers, thereby improving the light reflection and heat insulation capabilities of the coatings. However, due to the poor interfacial compatibility between artificial microspheres and titanium oxide materials, the two are unevenly distributed, and heat accumulation and a significant increase in surface temperature will still occur in the coatings on the building surface after long-term sunlight irradiation. Therefore, artificial microspheres and titanium oxide materials can be further in-situ integrated to form artificial microsphere@titanium oxide composites to exert the synergistic effect of the two materials. However, the surface structure of artificial microspheres is smooth, and problems such as difficult deposition and uneven coating often occur during the process of coating titanium oxide on their surface, which limits the further application and promotion of artificial microsphere@titanium oxide composites. Therefore, developing a preparation technology for artificial microsphere@titanium oxide composites with low cost and uniform coating is one of the important problems faced in the field of reflective heat-insulating pigments and fillers. Summary of the Invention

[0005] In view of the problems and defects existing in the existing preparation of artificial microsphere@titanium oxide composites, the present invention proposes a titanium oxide composite material with high reflective heat-insulating performance, its preparation method and application. By using the low-temperature liquid-phase precipitation method with simple process flow, low cost and environmental protection, and controlling the hydrolysis thermodynamics and kinetics of the titanium source, uniform deposition of titanium oxide on the surface of artificial microspheres is achieved.

[0006] To achieve the above object, the technical solution of the present invention is realized as follows: A preparation method of a titanium oxide composite material with high reflective heat-insulating performance, the steps are as follows: (1) Uniformly disperse the structural modifier into the water solvent to obtain the surface structural modifier solution A; (2) Add artificial microspheres to the surface structural modifier solution A under stirring conditions, wash and filter after uniform dispersion to obtain the modified artificial microspheres B; (3) Uniformly disperse the surfactant into the water solvent to obtain the surfactant solution C; (4) Uniformly disperse the modified artificial microspheres B into the surfactant solution C under stirring conditions to prepare the artificial microsphere suspension D; (5) Add the titanium salt to the water solvent and dilute it to obtain the titanium source solution E; (6) Heat the artificial microsphere suspension D, slowly drop the titanium source solution E under stirring conditions, and obtain the artificial microsphere@titanium oxide composite material, that is, the titanium oxide composite material after constant temperature aging and washing.

[0007] In the above step (1), the structural modifier is one or more of sodium hydroxide, potassium hydroxide, lithium hydroxide, calcium hydroxide, barium hydroxide, ammonium fluoride, and sodium fluoride, and the concentration of the surface structural modifier solution A is 0.01 - 0.5 g / mL; by using the structural modifier, it reacts with the Si - O - Si bond of the microbeads to form active sites that are easy to combine with Ti - O and construct a rough surface, making it easier to hydrolyze and deposit titanium oxide uniformly on the surface of the microbeads.

[0008] In the above step (2), 0.05 - 1.0 g of artificial microbeads are added to each mL of the surface structural modifier solution A.

[0009] In the above step (3), the surfactant is one or more of sodium dodecylbenzenesulfonate, sodium dodecyl sulfate, sodium lauryl alcohol polyoxyethylene ether sulfate, fatty alcohol polyoxyethylene ether sulfate, secondary alkyl sulfonate, fatty alcohol hydroxyethyl sulfonate, sodium N - lauroylsarcosinate, sodium cocoyl methyl taurate, sodium N - lauroylglutamate, sodium lauryl alcohol polyoxyethylene ether carboxylate, disodium dodecyl alcohol polyoxyethylene ether sulfosuccinate, alpha - olefin sulfonate, and ammonium dodecyl sulfate; the concentration of the surfactant solution C is 0.05 - 10.0 g / L.

[0010] In the above step (4), 0.5 - 100 modified artificial microbeads B are added to each L of the surfactant solution C.

[0011] In the above step (5), the titanium salt is one or more of titanium tetrachloride, titanium trichloride, titanium dichloride, titanium oxysulfate, and titanium sulfate; the concentration of the titanium source solution E is 0.01 - 2.0 g / mL.

[0012] In the above step (6), the mass ratio of the artificial microbead suspension D to the titanium source solution E is 1:5 - 100.

[0013] In the above step (6), the flow rate of the slow dropwise addition is 0.05 - 5.0 mL / min, the temperature of the constant - temperature aging is 45 - 95 °C, and the time is 2 - 24 h.

[0014] Furthermore, the above stirring method is mechanical stirring or magnetic stirring.

[0015] The titanium oxide composite material prepared by the above - mentioned preparation method.

[0016] The application of the above - mentioned titanium oxide composite material in architectural reflective and heat - insulating coatings.

[0017] The beneficial effects produced by the present invention are: The present invention in-situ integrates titanium oxide with artificial microspheres to form an artificial microsphere@titanium oxide composite material, which can solve the problems of poor heat insulation performance of traditional titanium oxide pigment fillers, low refractive index of artificial microspheres, and poor compatibility at the physical mixing interface between the two, resulting in a large amount of pigment filler usage and high cost of reflective heat insulation coatings. The artificial microsphere@titanium oxide composite material provided by the present invention effectively solves the problems of uneven dispersion and loose contact of titanium oxide on the surface of artificial microspheres by adjusting the surface structure and composition of artificial microspheres and improving the hydrolysis nucleation sites and acting forces of titanium salts. The artificial microsphere@titanium oxide composite material significantly reduces the usage amount of titanium oxide-based pigment fillers and improves the reflective heat insulation ability, further reducing the raw material cost. Combining the reflection performance and heat insulation performance curves, compared with pure microsphere functional fillers and microsphere surface-coated titanium oxide composite materials prepared from organic titanium sources, the total solar reflectance (TSR) and near-infrared reflectance (NIR) of the composite material of the present invention are 91.89% and 93.17% respectively, and the heat insulation temperature difference reaches 13.2 °C, showing more excellent reflection performance and heat insulation effect. Description of the Drawings

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0019] Figure 1 SEM image of the artificial microsphere@titanium oxide composite material prepared in Example 1.

[0020] Figure 2 SEM image of the artificial microsphere@titanium oxide composite material prepared in Example 2.

[0021] Figure 3 SEM image of the artificial microsphere@titanium oxide composite material prepared in Example 3.

[0022] Figure 4 SEM image of the artificial microsphere@titanium oxide composite material prepared in Example 4.

[0023] Figure 5 Reflection spectra of the artificial microsphere@titanium oxide composite materials prepared in Examples 1 and 2, artificial microspheres, and titanium oxide deposited on the surface of artificial microspheres from organic titanium sources (Comparative Example 1).

[0024] Figure 6 Heat insulation curves of the artificial microsphere@titanium oxide composite materials prepared in Examples 1 and 2, artificial microspheres, and titanium oxide deposited on the surface of artificial microspheres from organic titanium sources (Comparative Example 1). Detailed Description of the Embodiments

[0025] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0026] Example 1 The preparation method of the titanium dioxide composite material with high reflection and heat insulation performance in this embodiment is as follows: (1) Add 2 g of sodium hydroxide to 100 mL of deionized water to obtain surface structure modification solution A; (2) Add 10 g of artificial microspheres (Zhengzhou Shenglaite New Materials Co., Ltd.) to the surface modifier solution A (100 mL), mechanically stir and disperse for 2 h, then wash and filter to obtain modified artificial microspheres B; (3) Disperse 0.05 g of sodium dodecylbenzenesulfonate in 50 mL of deionized water to obtain surfactant solution C; (4) Disperse the modified artificial microspheres B (5 g) into the surfactant solution C (50 mL) under mechanical stirring to prepare artificial microsphere suspension D; (5) Add 6 g of titanium tetrachloride to 400 mL of deionized water to obtain titanium source solution E; (6) Heat 55 g of artificial microsphere suspension D to 80 °C, and then slowly drip (the dripping rate is 1.3 mL / min) the titanium tetrachloride solution E (406 g) into it under stirring through a metering pump. After dripping, keep it at 80 °C for constant aging for 3 h, and then obtain artificial microsphere@titanium dioxide composite material F, that is, titanium dioxide composite material, after washing and cleaning.

[0027] Example 2 The preparation method of the titanium dioxide composite material with high reflection and heat insulation performance in this embodiment is as follows: (1) Add 2 g of barium hydroxide to 100 mL of deionized water to obtain surface structure modification solution A; (2) Add 10 g of artificial microspheres to the surface modifier solution A (100 mL), mechanically stir and disperse for 2 h, then wash and filter to obtain modified artificial microspheres B; (3) Disperse 0.05 g of sodium dodecyl sulfate in 50 mL of deionized water to obtain surfactant solution C; (4) Disperse the modified artificial microspheres B (5 g) into the surfactant solution C (50 mL) under mechanical stirring to prepare artificial microsphere suspension D; (5) Add 6 g of titanium trichloride to 400 mL of deionized water to obtain titanium source solution E; (6) Heat 55 g of artificial microbead suspension D to 60 °C, and then slowly add (the dropping rate is 1.0 mL / min) titanium trichloride solution E (406 g) to it under stirring. After the addition is completed, keep it at a constant temperature of 60 °C for aging for 12 h, and after washing and cleaning, obtain artificial microbead@titanium oxide composite material F, that is, titanium oxide composite material.

[0028] Example 3 The preparation method of the titanium oxide composite material with high reflective heat insulation performance in this example is as follows: (1) Add 1.5 g of ammonium fluoride to 100 mL of deionized water to obtain surface structure modification solution A; (2) Add 10 g of artificial microbeads to surface modifier solution A (100 mL), mechanically stir and disperse for 1 h, then wash and filter to obtain modified artificial microbeads B; (3) Disperse 0.05 g of ammonium lauryl sulfate in 50 mL of deionized water to obtain surfactant solution C; (4) Disperse the modified artificial microbeads B (5 g) in surfactant solution C (50 mL) under mechanical stirring to prepare artificial microbead suspension D; (5) Add 5 g of titanium sulfate to 400 mL of deionized water to obtain titanium source solution E; (6) Heat 55 g of artificial microbead suspension D to 70 °C, and then slowly add titanium sulfate solution E (405 g) to it under stirring. After the addition is completed, keep it at a constant temperature of 70 °C for aging for 24 h, and after washing and cleaning, obtain artificial microbead@titanium oxide composite material F, that is, titanium oxide composite material.

[0029] Example 4 The preparation method of the titanium oxide composite material with high reflective heat insulation performance in this example is as follows: (1) Add 2 g of sodium fluoride to 100 mL of deionized water to obtain surface structure modification solution A; (2) Add 10 g of artificial microbeads to surface modifier solution A (100 mL), mechanically stir and disperse for 3 h, then wash and filter to obtain modified artificial microbeads B; (3) Disperse 0.1 g of sodium dodecyl polyoxyethylene ether sulfate in 100 mL of deionized water to obtain surfactant solution C; (4) Disperse the modified artificial microbeads B (5 g) in surfactant solution C (50 mL) under mechanical stirring to prepare artificial microbead suspension D; (5) Add 5 g of titanium oxysulfate to 400 mL of deionized water to obtain titanium source solution E; (6) Heat 55 g of artificial microbead suspension D to 80 °C, and then slowly add (the dropping rate is 1.3 mL / min) titanium oxysulfate solution E (405 g) to it under stirring. After the addition is complete, keep it at 80 °C for constant temperature aging for 2 h, and after washing and cleaning, obtain artificial microbead@titanium oxide composite material F, that is, titanium oxide composite material.

[0030] Example 5 The preparation method of the titanium oxide composite material with high reflective and heat-insulating performance in this example is as follows: (1) Add 2 g of potassium hydroxide to 100 mL of deionized water to obtain surface structure modification solution A; (2) Add 10 g of artificial microbeads to surface modifier solution A (100 mL), mechanically stir and disperse for 3 h, and then wash and filter to obtain modified artificial microbeads B; (3) Disperse 0.1 g of sodium cocoyl methyl taurate in 100 mL of deionized water to obtain surfactant solution C; (4) Disperse modified artificial microbeads B (5 g) in surfactant solution C (50 mL) under mechanical stirring to prepare artificial microbead suspension D; (5) Add 5 g of titanium oxysulfate to 400 mL of deionized water to obtain titanium source solution E; (6) Heat 55 g of artificial microbead suspension D to 45 °C, and then slowly add (the dropping rate is 0.8 mL / min) titanium oxysulfate solution E (405 g) to it under stirring. After the addition is complete, keep it at 90 °C for constant temperature aging for 2 h, and after washing and cleaning, obtain artificial microbead@titanium oxide composite material F, that is, titanium oxide composite material.

[0031] Example 6 The preparation method of the titanium oxide composite material with high reflective and heat-insulating performance in this example is as follows: (1) Add 2 g of calcium hydroxide to 100 mL of deionized water to obtain surface structure modification solution A; (2) Add 10 g of artificial microbeads to surface modifier solution A (100 mL), mechanically stir and disperse for 3 h, and then wash and filter to obtain modified artificial microbeads B; (3) Disperse 0.1 g of secondary alkyl sulfonate in 100 mL of deionized water to obtain surfactant solution C; (4) Disperse modified artificial microbeads B (5 g) in surfactant solution C (50 mL) under mechanical stirring to prepare artificial microbead suspension D; (5) Add 5 g of titanium oxysulfate to 400 mL of deionized water to obtain titanium source solution E; (6) Heat 55 g of artificial microbead suspension D to 95 °C, and slowly add (the dropping rate is 1.0 mL / min) titanium oxysulfate solution E (405 g) thereto under stirring. After the addition is completed, keep it at a constant temperature of 90 °C for aging for 20 h, and after washing and cleaning, obtain artificial microbead@titanium oxide composite material F, that is, titanium oxide composite material.

[0032] Example 7 The preparation method of the titanium oxide composite material with high reflective and heat-insulating performance in this example is as follows: (1) Add 1 g of potassium hydroxide to 100 mL of deionized water to obtain surface structure modification solution A; (2) Add 5 g of artificial microbeads to surface modifier solution A (100 mL), mechanically stir and disperse for 3 h, and then wash and filter to obtain modified artificial microbeads B; (3) Disperse 1 g of sodium cocoyl methyl taurate in 100 mL of deionized water to obtain surfactant solution C; (4) Disperse modified artificial microbeads B (3 g) in surfactant solution C (50 mL) under mechanical stirring to prepare artificial microbead suspension D; (5) Add 4 g of titanium oxysulfate to 400 mL of deionized water to obtain titanium source solution E; (6) Heat 50 g of artificial microbead suspension D to 95 °C, and slowly add (the dropping rate is 0.05 mL / min) titanium oxysulfate solution E (400 g) thereto under stirring. After the addition is completed, keep it at a constant temperature of 95 °C for aging for 2 h, and after washing and cleaning, obtain artificial microbead@titanium oxide composite material F, that is, titanium oxide composite material.

[0033] Example 8 The preparation method of the titanium oxide composite material with high reflective and heat-insulating performance in this example is as follows: (1) Add 25 g of ammonium fluoride to 50 mL of deionized water to obtain surface structure modification solution A; (2) Add 25 g of artificial microbeads to surface modifier solution A (50 mL), mechanically stir and disperse for 1 h, and then wash and filter to obtain modified artificial microbeads B; (3) Disperse 0.01 g of sodium dodecyl polyoxyethylene ether sulfosuccinate in 200 mL of deionized water to obtain surfactant solution C; (4) Disperse modified artificial microbeads B (0.1 g) in surfactant solution C (200 mL) under mechanical stirring to prepare artificial microbead suspension D; (5) Add 50 g of titanium sulfate to 25 mL of deionized water to obtain titanium source solution E; (6) Heat 5 g of artificial microbead suspension D to 45 °C, and then slowly add titanium sulfate solution E (50 g) dropwise thereto under stirring. After the addition is completed, keep it at a constant temperature of 45 °C for aging for 24 h, and after washing and cleaning, obtain artificial microbead@titanium oxide composite material F, that is, titanium oxide composite material.

[0034] Example 9 The preparation method of the titanium oxide composite material with high reflection and heat insulation performance in this example is as follows: (1) Add 10 g of sodium hydroxide to 100 mL of deionized water to obtain surface structure modification solution A; (2) Add 100 g of artificial microbeads (Zhengzhou Shenglaite New Materials Co., Ltd.) to surface modifier solution A (100 mL), mechanically stir and disperse for 2 h, then wash and filter to obtain modified artificial microbeads B; (3) Disperse 0.25 g of sodium dodecylbenzenesulfonate in 50 mL of deionized water to obtain surfactant solution C; (4) Disperse modified artificial microbeads B (5 g) in surfactant solution C (50 mL) under mechanical stirring to prepare artificial microbead suspension D; (5) Add 50 g of titanium tetrachloride to 500 mL of deionized water to obtain titanium source solution E; (6) Heat 5 g of artificial microbead suspension D to 80 °C, and then slowly add titanium tetrachloride solution E (500 g) dropwise thereto through a metering pump under stirring (the dropping rate is 5 mL / min). After the addition is completed, keep it at a constant temperature of 80 °C for aging for 3 h, and after washing and cleaning, obtain artificial microbead@titanium oxide composite material F, that is, titanium oxide composite material.

[0035] Comparative Example 1 The preparation method of tetrabutyl titanate hydrolyzed anatase-coated microbeads in this comparative example is as follows: (1) Mix 50 mL of absolute ethanol and 50 mL of deionized water evenly to form a mixed solvent for later use; (2) Add 10 g of hollow glass microbeads to 100 mL of ethanol and distilled water mixed solvent, ultrasonically clean for 10 min, then clean with deionized water and dry for later use; (3) Dissolve 5 mL of TBOT and 0.5 g of acetic acid in 100 mL of ethanol, stir for 15 min to form a titanium source solution; (4) Add 5 g of washed and dried hollow glass microspheres into 100 g of titanium source solution, heat up to 60 °C at a rotation speed of 300 rpm and stir for 6 h for reaction, filter and wash with deionized water, and dry at 80 °C to obtain glass microsphere@anatase titanium oxide composite material.

[0036] Example of implementation effect Figure 1 It is the SEM image of the artificial microsphere@titanium oxide prepared in Example 1. It can be seen that a layer of titanium oxide is evenly deposited on the surface of the artificial microsphere.

[0037] Figure 2 It is the SEM image of the artificial microsphere@titanium oxide prepared in Example 2. It can be seen that a layer of titanium oxide is evenly deposited on the surface of the artificial microsphere.

[0038] Figure 3 It is the SEM image of the artificial microsphere@titanium oxide prepared in Example 3. It can be seen that a layer of titanium oxide is evenly deposited on the surface of the artificial microsphere.

[0039] Figure 4 It is the SEM image of the artificial microsphere@titanium oxide prepared in Example 4. It can be seen that a layer of titanium oxide is evenly deposited on the surface of the artificial microsphere.

[0040] Figure 5 It is the reflection spectrum diagram of the artificial microsphere@titanium oxide, artificial microsphere and titanium oxide deposited on the surface of the artificial microsphere by organic titanium source (Comparative Example 1) prepared in Examples 1 and 2. It can be seen that the solar reflectance of the artificial microsphere and the titanium oxide deposited by tetrabutyl titanate on the artificial microsphere is significantly lower than 95%. However, the near-infrared reflectance of the artificial microsphere@anatase titanium oxide prepared in Examples 1 and 2 is as high as 98%, and the total solar reflectance is also significantly enhanced, showing excellent solar reflection ability.

[0041] Figure 6 It is the heat insulation curve diagram of the artificial microsphere@titanium oxide prepared in Examples 1 and 2, artificial microsphere and titanium oxide deposited on the surface of the artificial microsphere by organic titanium source (Comparative Example 1). It can be seen that the temperature in the box rises to 45 °C and 38 °C respectively after 30 min of sunlight irradiation for the artificial microsphere and the titanium oxide deposited by tetrabutyl titanate on the artificial microsphere. However, the temperature in the box rises to 36 °C and 30 °C respectively for the artificial microsphere@anatase titanium oxide film prepared in Examples 1 and 2, greatly improving the heat insulation ability of the pigment and filler.

[0042] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A preparation method of a titanium oxide composite material with high reflective and heat-insulating performance, characterized in that The steps are as follows: (1) Uniformly disperse the structure modifier into the aqueous solvent to obtain the surface structure modifier solution A; (2) Add the artificial microbeads into the surface structure modifier solution A under stirring conditions. After uniform dispersion, wash and filter to obtain the modified artificial microbeads B; (3) Uniformly disperse the surfactant into the aqueous solvent to obtain the surfactant solution C; (4) Uniformly disperse the modified artificial microbeads B into the surfactant solution C under stirring conditions to prepare the artificial microbead suspension D; (5) Add the titanium salt into the aqueous solvent and dilute to obtain the titanium source solution E; (6) Heat the artificial microbead suspension D, slowly dropwise add the titanium source solution E under stirring conditions, and obtain the artificial microbead@titanium oxide composite material, i.e., the titanium oxide composite material, after constant temperature aging and washing.

2. The preparation method of the titanium oxide composite material with high reflective heat insulation performance according to claim 1, characterized in that: In the step (1), the structure modifier is one or more of sodium hydroxide, potassium hydroxide, lithium hydroxide, calcium hydroxide, barium hydroxide, ammonium fluoride, and sodium fluoride; the concentration of the surface structure modifier solution A is 0.01 - 0.5 g / mL.

3. The preparation method of the titanium oxide composite material with high reflective heat insulation performance according to claim 2, wherein: In the step (2), 0.05 - 1.0 g of artificial microbeads are added to each mL of the surface structure modifier solution A.

4. The preparation method of the titanium oxide composite material with high reflection and heat insulation performance according to claim 3, characterized in that: In the step (3), the surfactant is one or more of sodium dodecylbenzenesulfonate, sodium dodecyl sulfate, sodium lauryl alcohol polyoxyethylene ether sulfate, fatty alcohol polyoxyethylene ether sulfate, secondary alkyl sulfonate, fatty alcohol hydroxyethyl sulfonate, sodium N-lauroyl sarcosinate, sodium cocoyl methyl taurate, sodium N-lauroyl glutamate, sodium lauryl alcohol polyoxyethylene ether carboxylate, disodium dodecyl alcohol polyoxyethylene ether sulfosuccinate, alpha-olefin sulfonate, and ammonium dodecyl sulfate; the concentration of the surfactant solution C is 0.05 - 10 g / L.

5. The preparation method of the titanium oxide composite material with high reflective heat insulation performance according to claim 4, characterized in that: In the step (4), 0.5 - 100 g of the modified artificial microbeads B are added to each L of the surfactant solution C.

6. The preparation method of the titanium oxide composite material with high reflective and heat-insulating performance according to claim 5, characterized in that: In the step (5), the titanium salt is one or more of titanium tetrachloride, titanium trichloride, titanium dichloride, titanium oxysulfate, and titanium sulfate; the concentration of the titanium source solution E is 0.01 - 2.0 g / mL.

7. The preparation method of the titanium oxide composite material with high reflection and heat insulation performance according to claim 6, characterized in that: In the step (6), the mass ratio of the artificial microbead suspension D to the titanium source solution E is 1:5 - 100.

8. The preparation method of the titanium oxide composite material with high reflective heat insulation performance according to claim 7, characterized in that: In the step (6), the slow dropping flow rate is 0.05 - 5.0 mL / min, the temperature of the constant temperature aging is 45 - 95 °C, and the time is 2 - 24 h.

9. The titanium oxide composite material prepared by using the preparation method according to any one of claims 1 - 8.

10. The application of the titanium oxide composite material according to claim 9 in a building reflective heat insulation coating.

Images