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Composition for preventing water-drops from bouncing and sputtering on super-hydrophobic surface

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

Active Publication Date: 2015-12-23
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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  • Composition for preventing water-drops from bouncing and sputtering on super-hydrophobic surface
  • Composition for preventing water-drops from bouncing and sputtering on super-hydrophobic surface
  • Composition for preventing water-drops from bouncing and sputtering on super-hydrophobic surface

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] PEO0.05%

[0045] SDS0.05%

[0046] Triton-4050.1%

[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 free falling at a height of 3cm and 50cm, respectively.

Embodiment 2

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

[0052] PVA0.1%

[0053] SDBS0.1%

[0054] N-1800.1%

[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] SDBS0.05%

[0061] C10E60.12%

[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 for preventing water-drops from bouncing and sputtering on a super-hydrophobic surface. The composition comprises two or three of the following substances: 1) a surfactant capable of reducing dynamic surface tension and equilibrium surface tension; 2) a synthesized or natural polymer; and 3) nanoparticles. The composition can be a combination of 1) and 2), and also can be a combination of 1), 2) and 3). Content of the composition is in an aqueous solution or a pesticide diluent and a paint diluent is that in the aqueous solution, the surfactant accounts for 0.1%-1%, the polymer accounts for 0.005%-1%, and the nano particles account for 1%-20%. The composition for preventing water-drops from bouncing and sputtering on the super-hydrophobic surface disclosed by the invention has the advantages of integrating low dynamic surface tension, low equilibrium surface tension, viscosity of the polymer and a thixotropic material, thereby jointly solving problems of the aqueous solution bouncing and sputtering on the super-hydrophobic surface.

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 Applications(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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