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Preparation method of flexible fluoride-free super-hydrophobic coating with photothermal conversion and heat storage functions

A super-hydrophobic coating, photothermal conversion technology, applied in the fields of organic, inorganic, functional materials and polymer materials, can solve the problems of inability to large-scale production and application, reduced flexibility, high price, etc., and achieve excellent photothermal conversion The effect of ability, simple construction and strong applicability

Active Publication Date: 2022-02-25
HEBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these porous carbon-based materials are expensive, have poor mechanical properties, and cannot be mass-produced and applied
In addition, due to the solidification of phase change materials, the flexibility of the material usually decreases with temperature, especially below the melting point, the flexibility of FSPCMs becomes poor and leads to brittleness, which limits its applications.
In addition, the currently prepared materials still show poor hydrophobicity and cannot resist harsh environmental factors, such as ultraviolet rays, acidic and alkaline environments, and there is a certain gap from practical applications.

Method used

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  • Preparation method of flexible fluoride-free super-hydrophobic coating with photothermal conversion and heat storage functions
  • Preparation method of flexible fluoride-free super-hydrophobic coating with photothermal conversion and heat storage functions
  • Preparation method of flexible fluoride-free super-hydrophobic coating with photothermal conversion and heat storage functions

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0066] (1) Preparation of cross-linked polystyrene nanotubes

[0067] Referring to the above-mentioned cationic polymerization method, under the condition of 25°C, add 117g cyclohexane (99% purity) and 2.337g divinylbenzene successively into a 250mL three-neck flask equipped with electric stirring, and pass in argon gas, and stir for 15min. , dropwise (dropping time is 10s) 0.15g boron trifluoride diethyl ether (purity: 98%) into the there-necked flask, and increase the stirring speed to 400r / min at the same time, and react for 5min. Transfer the resulting suspension to a beaker, and after the polymer settles, pour the supernatant into a waste liquid bucket, wash the obtained product repeatedly with absolute ethanol to remove the solvent and initiator, and obtain the product after suction filtration. The final collected product is dried in an oven to obtain the cross-linked polystyrene nanotube.

[0068] figure 2 It is a photograph obtained by scanning cross-linked polystyr...

Embodiment 2

[0093] (1) Preparation of poly(styrene-divinylbenzene) nanotubes

[0094] At 25°C, 117g of cyclohexane (99% purity), 2.337g of divinylbenzene, and 0.5g of styrene were successively added to a 250mL three-necked flask equipped with electric stirring, and an inert gas (nitrogen or argon) After stirring for 15 minutes, add 0.15 g of boron trifluoride diethyl ether (purity: 98%) dropwise into the there-necked flask (dropping time is 10 s), and increase the stirring speed to 400 r / min at the same time, and react for 5 minutes. Transfer the resulting suspension to a beaker, and after the polymer settles, pour the supernatant into a waste liquid bucket, wash the obtained product repeatedly with absolute ethanol to remove the solvent and initiator, and obtain the product after suction filtration. The finally collected product is dried in an oven to obtain poly(styrene-divinylbenzene) nanotubes.

[0095] (2) The preparation of the cross-linked poly(styrene-divinylbenzene) nanotubes mo...

Embodiment 3

[0100] (1) The preparation of cross-linked polystyrene nanotubes is the same as in Example 1 step (1);

[0101] (2) Preparation of cross-linked polystyrene nanotubes modified by sulfonic acid group

[0102] Take 1 g of the dried cross-linked polystyrene nanotubes obtained in step (1) in a one-necked bottle, add 100 g of 1,2-dichloroethane (purity is 99%), soak for 2 h at 25 ° C, and take 30 g of sulfamic acid In another single-necked flask, place it in a water bath equipped with magnetic stirring for 2 hours at a temperature of 0°C, transfer the mixture obtained in the two single-necked flasks to a 500ml three-necked flask, and condense under heating in an oil bath at 80°C Reflux, react for 5 hours, cool down naturally to 20-30°C after the reaction stops, transfer the resulting suspension to a 1L beaker, add absolute ethanol to dilute, then perform suction filtration, and the product obtained is rinsed repeatedly with absolute ethanol and placed in an oven to dry , that is, c...

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Abstract

The invention relates to a preparation method of a flexible fluoride-free super-hydrophobic coating with photothermal conversion and heat storage functions. According to the method, polydimethylsiloxane is introduced as an adhesive, the adhesive and a phase change material are dissolved in a solvent, then carbon-doped mesoporous silica nanotubes are dispersed in the system, and finally a blended solution is sprayed on a substrate in a spraying manner, so that the flexible fluorine-free super-hydrophobic coating with photothermal conversion and heat storage functions is obtained. The process of preparing a composite phase change material and hydrophobic modification is omitted, and the coating not only has excellent photothermal conversion capacity, but also has good flexibility and excellent super-hydrophobic performance, is simple to construct and low in preparation cost, and has huge practical application value.

Description

technical field [0001] The technical solution of the present invention relates to the fields of organic, inorganic, functional materials and polymer materials, in particular to a method for preparing a flexible fluorine-free super-hydrophobic coating with light-to-heat conversion and heat storage functions. Background technique [0002] With the continuous development of social economy and the continuous increase of human demand for energy, the depletion of fossil energy is inevitable (Sternberg A, Bardow A. Power-to-What? -Environmental Assessment of Energy Storage Systems [J].Energ.Environ.Sci ., 2015, 8:389-400.). Reducing or replacing the use of fossil energy is crucial to the normal operation of human ecological civilization (Yuan K, Shi J, Aftab W, Qin M, Usman A, ZhouF, et al.Engineering the Thermal Conductivity of Functional Phase-ChangeMaterials for Heat Energy Conversion, Storage, and Utilization. Adv. Funct. Mater. 2019; 30(8): 1904228.). In economic and social ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D183/04C09D5/08C09D7/61
CPCC09D183/04C09D5/08C09D7/61C09D7/70C08K2201/011C08K7/26C08K3/04Y02P20/10
Inventor 张旭卢绍勋王小梅
Owner HEBEI UNIV OF TECH
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