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Lotus-leaf-like self-cleaning finishing varnish and preparation method thereof

A kind of finishing varnish and lotus leaf technology, which is applied in the direction of biocide-containing paint, coating, antifouling/underwater coating, etc., can solve the problem that pollutants or liquids cannot be completely attached, and achieve improved self-cleaning performance, Good construction and transparent appearance

Active Publication Date: 2018-09-21
哈尔滨雨阳佳泰环保新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] This rough layer traps air in the bottom between the protrusions so that external pollutants or liquids cannot completely adhere to the lotus leaves

Method used

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  • Lotus-leaf-like self-cleaning finishing varnish and preparation method thereof
  • Lotus-leaf-like self-cleaning finishing varnish and preparation method thereof
  • Lotus-leaf-like self-cleaning finishing varnish and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment A

[0047] Example A: Preparation of SiO 2 / TiO 2 Nanocomposite

[0048] Propylene B wood fiber, tetraethoxysilane, tetrabutyl titanate, ethanol and hydrochloric acid (36-38%) are used as raw materials, among which, tetrabutyl titanate: tetraethoxysilane: EtOH: propane B wood fiber : Molar ratio of HCl=1:1.5:25:10:0.002,

[0049] Add absolute ethanol and propane B wood fiber to the reactor first; then add tetrabutyl titanate to form a solution, add a quantitative hydrochloric acid solution dropwise, stir for 2 hours, put it into a constant temperature drying box, and prepare a xerogel for use.

[0050] Put the dry gel into the muffle furnace, raise the temperature to 400 and 450°C at a heating rate of 1°C / min, remove the solvent, and grow the crystal to finally produce SiO 2 / TiO 2 Composite material, its TEM electron microscope picture is as follows figure 1 As shown, its size distribution is uniform, in the range of tens of nanometers, it can be seen that the final product ...

Embodiment B

[0051] Example B: Preparation of Rough Titanium Dioxide Micro-Nanomaterials

[0052] Using titanium tetrachloride, absolute ethanol and hydrochloric acid (36-38%) as raw materials, TiCl 4 : EtOH: HCl molar ratio = 1:25:0.002,

[0053] First add absolute ethanol into the reactor; then add titanium tetrachloride to form a yellow solution, dropwise add quantitative hydrochloric acid solution, and stir for 2 hours; finally, put it into a constant temperature drying box to prepare a xerogel for use.

Embodiment 1

[0056] First add 200g of deionized water to the mixer, then add 3g of defoamer (MDF), 3g of wetting agent (CF-10), 600 rpm, and continue stirring for 10 minutes;

[0057] Then add aqueous emulsion 350g, SiO 2 / TiO 2 Nanocomposite material 40g, rough titanium dioxide micro-nano material 40g, bactericide (DB20 of Sol) 8g, antifungal agent (HF of Sol) 5g, film-forming aid diethylene glycol butyl ether 30g, 800 rpm Minutes, continuous stirring for 30 minutes;

[0058] Finally, add 15g of thickener (RHEOLATE 150 from Elementis), stir for 30-50 minutes, until the viscosity is stable, filter and fill.

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PUM

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Abstract

The invention provides a lotus-leaf-like self-cleaning finishing varnish and a preparation method thereof. The finishing varnish comprises a waterborne emulsion, a SiO2 / TiO2 nano-composite and / or a titania micron-nano-material, an antifoaming agent, a film forming aid, a thickening agent, deionized water, and an optional wetting agent, fungicide and / or mold inhibitor. In the preparation method, the SiO2 / TiO2 nano-composite and the coarse titania micron-nano-material are added into the waterborne finishing varnish, and thus the water resistance and water whiteness resistance of the finishing varnish are improved; meanwhile, a film is endowed with super-hydrophobicity and the property of decomposing organic matter. The finishing varnish is transparent in appearance, simple in production process and good in workability, meets environmental indexes and can be produced in batches.

Description

technical field [0001] The invention relates to a lotus leaf-like self-cleaning finish varnish and a preparation method thereof, which is mainly used for the finish of buildings to improve the self-cleaning performance and stain resistance of the building surface. Background technique [0002] Numerous micron-scale waxy papilla structures are attached to the surface of the lotus leaf. When observing these papillae with an electron microscope, it can be seen that there are many nano-scale particles similar in structure attached to the surface of each micron-sized papillae. Scientists call this the micro-nano double structure of the lotus leaf. It is because of these tiny double structures that the contact area between the surface of the lotus leaf and water droplets or dust is very limited, so the water droplets roll on the leaf surface and can take away the dust. And the water does not stay on the surface of the lotus leaf. [0003] The principle of the lotus leaf not stic...

Claims

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Application Information

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IPC IPC(8): C09D133/04C09D5/16
CPCC08K2003/2241C08K2201/011C08K2201/014C08L2201/08C08L2201/10C08L2205/025C08L2205/03C09D5/1681C09D5/1687C09D133/04C08L91/06C08K9/06C08K3/36C08K3/22
Inventor 郑荣荣张文惠于海泉杨洋王维全吕魁奇
Owner 哈尔滨雨阳佳泰环保新材料有限公司
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