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Compositions for preventing water droplet bouncing and sputtering on superhydrophobic surfaces

A super-hydrophobic, composition technology, applied in the field of pesticides or coatings, can solve the problems of difficult to spray and the polymer concentration can not be too high

Active Publication Date: 2018-06-19
BEIJING NATURE STONE SCI TECH DEVP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But if the shear viscosity is too high, it is not easy to spray, and the polymer concentration should not be too high

Method used

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  • Compositions for preventing water droplet bouncing and sputtering on superhydrophobic surfaces
  • Compositions for preventing water droplet bouncing and sputtering on superhydrophobic surfaces
  • Compositions for preventing water droplet bouncing and sputtering on superhydrophobic surfaces

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Mix and dissolve PEO (molecular weight: 1 million), sodium dodecyl sulfate (SDS), Triton-405 and deionized water according to the following mass percentages:

[0044] PEO 0.05%

[0045] SDS 0.05%

[0046] Triton-405 0.1%

[0047] Deionized water 99.8%

[0048] Obtaining anti-bounce and splash compositions in superhydrophobic cabbage leaves.

[0049] image 3 A) photo of cabbage; B) electron microscope photo of cabbage leaf; C): photo of contact angle of water drop on cabbage leaf; D): photo of rolling angle of water drop on cabbage leaf; E) impact phenomenon of water drop on cabbage leaf (catapult and sputtering); F) Photograph of the composition against catapult and sputtering on cabbage leaves. Low velocity and high velocity are the velocities produced by a free-falling object at a height of 3 cm and 50 cm, respectively.

Embodiment 2

[0051] Polyvinyl alcohol (PVA, degree of polymerization 1750±50), sodium dodecylbenzenesulfonate (SDBS), organic silicon additive N-180 (provided by Nuonong) and deionized water were expressed in the following mass percentages Mixing and stirring to dissolve:

[0052] PVA 0.1%

[0053] SDBS 0.1%

[0054] N-180 0.1%

[0055] Deionized water 99.7%

[0056] Obtaining anti-bounce and sputter compositions in superhydrophobic rice leaves.

Embodiment 3

[0058] Mix and dissolve polyoxyethylene alkyl ethers (C10E6), sodium dodecylbenzenesulfonate (SDBS), gelatin and deionized water according to the following mass percentages:

[0059] Gelatin 0.1%

[0060] SDBS 0.05%

[0061] C10E6 0.12%

[0062] Deionized water 99.73%

[0063] Obtaining anti-bounce and sputter compositions in superhydrophobic cauliflower leaves.

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Abstract

The present invention relates to a composition capable of preventing water droplets from bouncing and sputtering on a superhydrophobic surface. Such compositions contain two or three classes of substances: 1) surfactants that lower the dynamic and equilibrium surface tension; 2) synthetic or natural polymers; 3) nanoparticles. The composition can be a combination of 1) and 2); it can also be a combination of 1), 2) and 3). The content of the composition in the aqueous solution or the pesticide dilution and the paint dilution is that the content of the surfactant in the aqueous solution is between 0.1%-1%, the content of the polymer is between 0.005%-1%, and the content of the nanoparticles is between 0.1% and 1%. Between 1%‑20%. The invention combines the advantages of low dynamic surface tension, low equilibrium surface tension, and viscosity of polymers and thixotropic materials to jointly solve the problems of ejection and sputtering of aqueous solutions on super-hydrophobic surfaces.

Description

technical field [0001] The invention relates to a water droplet anti-bounce and sputtering composition on a super-hydrophobic interface, and belongs to the technical field of pesticides or coatings. Background technique [0002] It is well known that water droplets bounce off superhydrophobic surfaces very easily, such as figure 1 As shown, when the impact velocity is large to a certain extent, the rebound is transformed into sputtering, such as figure 2 shown. Rebounding and sputtering will cause a great waste of materials in the fields of pesticides, coatings, inkjet, etc., which not only reduces the effective utilization rate, but also pollutes the environment and brings harm and danger to operators. Reducing the dynamic surface tension by adding surfactants is the main means to solve such problems, but there are also reports in the literature that adding a small amount of polymer to increase the elongational viscosity can suppress the ejection behavior. [0003] The ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L71/02C08L29/04C08L89/00C08L93/04C08L3/02C08L33/26C08K5/42C08K3/36
Inventor 江雷宋美荣张玲娟马杰董智超
Owner BEIJING NATURE STONE SCI TECH DEVP
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