Super-hydrophobic self-cleaning radiation cooling film and preparation method thereof

一种薄膜制备、自清洁的技术，应用在扁平制品、其他家里用具、应用等方向，能够解决没考虑环境对材料降温效果的影响、分层涂布成本高、操作过程复杂等问题，达到优异防污自清洁作用、实现大面积生产、制备工艺简单的效果

Active Publication Date: 2019-11-22
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Nanoparticles are used in an existing architectural membrane structure, and the cost of layered coating is high and the operation process is complicated
Although it has a certain cooling effect, it does not consider the influence of the environment on the cooling effect of the material, such as the impact of rain on the life of the material, the impact of water soaking on the radiation cooling effect of the material, and the dust pollutants in the air on the reflectivity and infrared emission of the material. rate impact, etc.

Method used

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  • Super-hydrophobic self-cleaning radiation cooling film and preparation method thereof
  • Super-hydrophobic self-cleaning radiation cooling film and preparation method thereof
  • Super-hydrophobic self-cleaning radiation cooling film and preparation method thereof

Examples

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preparation example Construction

[0037] A method for preparing a superhydrophobic self-cleaning radiation cooling film of the present invention comprises the following steps:

[0038] S1, P(VDF x -Co-HFP y ) and PDMS are dissolved in a composite polar solvent to form P(VDF x -Co-HFP y ) / PDMS polymer composite translucent solution;

[0039] S101. Weigh a certain amount of P(VDF x -Co-HFP y ) dissolved in acetone solution and stirred at room temperature for 3 to 5 hours until completely dissolved;

[0040] P(VDF x -Co-HFP y) to acetone mass ratio of 1: (10 ~ 15).

[0041] S102, add PDMS prepolymer A component, then add tetrahydrofuran solvent, and stir evenly;

[0042] P(VDF x -Co-HFP y ) to THF in a mass ratio of (1-2):15.

[0043] S103. Add component B of PDMS curing agent and stir for 15-30 minutes until uniform and translucent.

[0044] P(VDF x -Co-HFP y ) to PDMS mass ratio is (2.0-4.0): 1.0.

[0045] S2, add non-solvent dropwise in the solution to make P(VDF x -Co-HFP y ) / PDMS undergoes ...

Embodiment 1

[0052] A superhydrophobic self-cleaning radiation cooling film and a preparation method thereof, comprising the following steps:

[0053] step 1

[0054] First weigh 3.5g of P(VDF x -Co-HFP y ) was dissolved in 49g of acetone solution, stirred at room temperature for 3h until completely dissolved, then sequentially added 1g of PDMS prepolymer component A and 30g of tetrahydrofuran solvent, after stirring evenly, added 0.1g of curing agent component B, and continued to stir for 15min to obtain half clear solution;

[0055] step 2

[0056] Add 3.0g of non-solvent water to the translucent solution drop by drop at a rate of 0.05ml every 10s while stirring to form a sol;

[0057] step 3

[0058] Pour the obtained sol into a 90mm petri dish, and dry it at room temperature for 3 hours until the solvent and water are completely evaporated, and then a microporous superhydrophobic self-cleaning radiation cooling film can be obtained.

[0059] The superhydrophobic self-cleaning rad...

Embodiment 2

[0061] A superhydrophobic self-cleaning radiation cooling film and a preparation method thereof, comprising the following steps:

[0062] step 1

[0063] First weigh 3.5g of P(VDF x -Co-HFP y ) was dissolved in 42g of acetone solution, stirred at room temperature for 3.5h until completely dissolved, then sequentially added 1g of PDMS prepolymer A component and 30g of tetrahydrofuran solvent, after stirring evenly, added 0.1g of curing agent B component, and continued to stir for 30min to obtain translucent solution;

[0064] step 2

[0065] Add 5.0g of non-solvent water to the translucent solution drop by drop at a rate of 0.05ml every 10s while stirring to form a sol;

[0066] Step 3: Pour the obtained sol into a 90mm petri dish, and dry it at room temperature for 4 hours until the solvent and water are completely evaporated, and then a microporous superhydrophobic self-cleaning radiation cooling film can be obtained.

[0067] The superhydrophobic self-cleaning radiation...

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Abstract

The invention discloses a super-hydrophobic self-cleaning radiation cooling film and a preparation method thereof. The preparation method comprises the following steps: dissolving P (VDFx-Co-HFPy) andPDMS in a composite polar solvent to form a P (VDFx-Co-HFPy) / PDMS polymer composite semitransparent solution; dropwise adding a non-solvent into the solution to enable P (VDFx-Co-HFPy) / PDMS to be subjected to phase separation to form sol; and casting and drying the sol to obtain the film with the micro-nano dual porous structure. The preparation process is simple, the method is easy to implement,and large-area production can be achieved.

Description

technical field [0001] The invention belongs to the technical field of superhydrophobic radiation cooling materials, in particular to a superhydrophobic self-cleaning radiation cooling film and a preparation method thereof. Background technique [0002] In hot summer, strong solar radiation often causes the temperature of ground objects to rise sharply. In recent years, global warming has increased the temperature of the earth, and the "urban heat island effect" has become increasingly serious, which has further aggravated human dependence on electrical appliances and air conditioners, and increased energy consumption. It is very necessary for human beings to seek cooling methods with low energy consumption or even no energy consumption. [0003] Due to its high reflectivity to sunlight and high emissivity in the mid-infrared region, radiation cooling materials can transmit heat to the cold outer space through the "atmospheric transparent window" in the form of electromagne...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L27/16C08L83/04C08J5/18
CPCC08J5/18C08J2327/16C08J2483/04C08J3/005C08J3/212C08L27/12C08L2203/16C08L83/06B29C41/003B29K2027/12B29L2007/008C08J2327/20C08L27/16C08L27/20
Inventor 薛朝华柳冰莹王慧迪贾顺田
Owner SHAANXI UNIV OF SCI & TECH
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