Preparation method of superamphiphobic SiO2 nano functional solution and application

A nano-functional, super-amphiphobic technology, applied in the direction of biocide-containing paints, coatings, anti-corrosion coatings, etc., can solve problems such as difficult and low-cost mass production, complex operation process, and harsh experimental conditions, and achieve great social value and economic value, simple process and controllable reaction

Active Publication Date: 2019-01-11
武汉疏能新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] However, the above-mentioned methods are relatively complicated in operation, or the equipment is complex or expensive, or the experimental conditions are harsh, and it is difficult to achieve low-cost mass production

Method used

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  • Preparation method of superamphiphobic SiO2 nano functional solution and application
  • Preparation method of superamphiphobic SiO2 nano functional solution and application
  • Preparation method of superamphiphobic SiO2 nano functional solution and application

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Embodiment 1

[0032] The embodiment of the present invention provides a super amphiphobic SiO 2 The preparation method of nano functional liquid comprises the following steps:

[0033] S1, add alkaline catalyst and silicate in alcoholic solvent, stir, react and age to prepare SiO 2 A dispersion of nanoparticles; the alcoholic solvent is one or more of ethanol, methanol, and isopropanol, preferably ethanol.

[0034] The basic catalyst is one or more of NaOH aqueous solution, KOH aqueous solution, ammonia water and ethylenediamine, wherein: the concentration of NaOH aqueous solution or KOH aqueous solution is between 0.2-5 mol / liter, and NaOH or KOH and alcohols The molar ratio of solvents is between 1:1000 and 1:200; the volume ratio of ammonia or ethylenediamine to alcohol solvents is between 1:5 and 1:20.

[0035] The silicate is one or both of tetrabutyl orthosilicate and tetraethyl orthosilicate.

[0036] The aging time is 1-7 days, preferably 4 days. The preparation of SiO 2 The re...

Embodiment 2

[0042] The embodiment of the present invention provides a super amphiphobic SiO 2 The preparation method of nanometer functional liquid, comprises the steps:

[0043] (1) SiO 2 Preparation of nanoparticle dispersion: add 5 ml of concentrated ammonia water to 60 ml of methanol at room temperature, then add 10 ml of tetraethyl orthosilicate (TEOS), stir for 3 hours, and age for 1 day.

[0044] see figure 1 As shown, the transmission electron microscope test results show that the SiO prepared in this embodiment 2 The average size of nanoparticles is about 18nm, and these small particles tend to form aggregates with an average diameter of about 60-100nm, which helps to form a secondary structure when preparing a film and helps to improve hydrophobic performance.

[0045] (2) SiO prepared in step (1) under stirring at room temperature 2 Add 0.6ml of 1H,1H,2H,2H-perfluorooctyltriethoxysilane to the nanoparticle dispersion, and react for 4 hours to obtain superamphiphobic SiO 2 ...

Embodiment 3

[0048] The embodiment of the present invention provides a super amphiphobic SiO 2 The preparation method of nanometer functional liquid, comprises the steps:

[0049] (1) SiO 2 Preparation of nanoparticle dispersion: 3.5 ml of ethylenediamine was added to 50 ml of methanol at room temperature, and then 10 ml of tetraethyl orthosilicate (TEOS) was added, stirred for 3 hours, and aged for 4 days.

[0050] (2) SiO prepared in step (1) under stirring at room temperature 2 Add 1H, 1H, 2H, 2H-perfluorodecyltrimethoxysilane to the nanoparticle dispersion to 0.8ml, and react for 5 hours to obtain superamphiphobic SiO 2 Nano functional liquid.

[0051] see Figure 4 As shown, using the super-amphiphobic SiO2 nano-functional liquid by spray coating on the surface of the ceramic tile, the static contact angle of the film product obtained with water is 166.9 degrees, and the rolling angle is 2.3 degrees; see Figure 5 As shown, the static contact angle of the obtained superamphiphobi...

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Abstract

The invention discloses a preparation method of a superamphiphobic SiO2 nano functional solution and relates to the technical field of hydrophobic materials. The preparation method comprises the following steps: adding an alkaline catalyst and silicate ester into an alcohol solvent, and stirring, reacting and ageing the mixture to prepare a SiO2 nanoparticle dispersion solution; and adding a fluorine-containing organic matter with low surface energy to react and modify to prepare the superamphiphobic SiO2 nano functional solution. The preparation method is simple in process, controllable in reaction, low in cost and good in dispersibility of the functional solution and has important social and economical value in industrial popularization, production and application. The invention also provides the application of the superamphiphobic SiO2 nano functional solution. The superamphiphobic SiO2 nano functional solution can be coated to various base materials such as glass, plastics, ceramics or metals by way of spraying, brush-spraying, dip-coating and the like to form a superamphiphobic film; the static contact angle of the surface of the superamphiphobic film and water can reach 168.4degrees, the rolling angle is as low as 1.5 degrees, the static contact angle of the surface of the superamphiphobic film and vacuum pump oil can reach 154.4 degrees, and the rolling angle is 7.8 degrees. The superamphiphobic SiO2 nano functional solution shows a very good superamphiphobic function.

Description

technical field [0001] The invention relates to the technical field of hydrophobic materials, in particular to a super amphiphobic SiO 2 Preparation method and application of nano functional liquid. Background technique [0002] Superhydrophobic film refers to a coating with a static contact angle of more than 150 degrees and a rolling angle of less than 10 degrees with water droplets. It has functions such as waterproof, self-cleaning, and antifouling, so it has broad application prospects in daily life and industrial fields. The superhydrophobic function of the solid surface is realized by modifying the low surface energy components on the surface with micro-nano rough structure or constructing the roughness on the low surface energy surface. Due to the superhydrophobic properties, the water droplets take away the dust particles and dirt adhering to the solid surface when they slide off the solid surface, thus realizing the self-cleaning function. This self-cleaning and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D183/08C09D7/62C09D1/00C09D5/16C09D5/08C09D5/14
CPCC08G77/24C08K2201/011C09D1/00C09D4/00C09D5/08C09D5/14C09D5/1675C09D5/1687C09D7/62C09D183/08C08K9/06C08K3/36
Inventor 魏长伟
Owner 武汉疏能新材料有限公司
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