CN109651639B - A method for preparing superhydrophobic surface on silicone rubber surface - Google Patents

Abstract

The invention discloses a method for preparing a superhydrophobic surface on the surface of silicone rubber, which relates to the field of high-voltage external insulation, and specifically includes the following steps: Step 1: Rinse the silicone rubber sample with deionized water and absolute ethanol, respectively, and wipe the surface dirt stearic acid, and let it dry naturally; Step 2: Measure 0.800g of stearic acid, pour stearic acid into beaker 1 containing 20ml of anhydrous ethanol solution, and stir with a magnetic stirrer; Step 3: Then weigh 1.5g of zinc oxide powder, then add the zinc oxide powder into the solution in beaker 1, and stir with a magnetic stirrer; Step 4: Use a high-pressure test device to corona treat the surface of the silicone rubber; Step 5: Immediately put the prepared solution Use a brush to evenly coat the corona-treated silicone rubber surface, then put it into a blast drying oven to dry at 40°C for 30 minutes, and then take it out to dry at room temperature. During the implementation of the method of the present invention, the hydrophobicity can be maintained for a long time, and the superhydrophobicity can be achieved.

Description

A method for preparing superhydrophobic surface on silicone rubber surface

technical field

The invention relates to the field of high-voltage external insulation, in particular to a method for preparing a superhydrophobic surface on the surface of a silicone rubber.

Background technique

The large-scale use of silicone rubber insulators in the transmission lines of the current power system is used for electrical insulation and mechanical support of the lines, which is of great significance to ensure the normal transmission of electric energy. Silicone rubber is an organic external insulating material, which already has a certain degree of hydrophobicity, but due to external ultraviolet rays and wind and rain erosion, the hydrophobicity of silicone rubber insulators will decrease. In order to improve the anti-pollution flashover and anti-icing ability of silicone rubber insulators, it is of great significance to prepare a coating with superhydrophobic effect on the surface of silicone rubber. Because the silicone rubber has a certain degree of hydrophobicity, in order to have better chemical connection with other materials, the present invention first performs corona treatment on the surface of the silicone rubber to obtain a more active and hydrophilic surface of the silicone rubber, and then uses stearic acid, oxidized The zinc and anhydrous ethanol method is used to prepare a hydrophobic surface with high hydrophobic effect and long durability on the surface of silicone rubber, which can improve the ability of silicone rubber insulators to resist pollution flashover and anti-icing, and improve the stability of power transmission.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a method for preparing a superhydrophobic surface on the surface of silicone rubber, so as to solve the problems raised in the above-mentioned background art.

To achieve the above object, the present invention provides the following technical solutions:

A method for preparing a superhydrophobic surface on a silicone rubber surface, comprising the following steps:

Step 1: Rinse the 10cm×10cm silicone rubber sample with deionized water and absolute ethanol respectively to wipe the surface dirt, and dry it naturally;

Step 2: Measure 0.800g of stearic acid, when weighing stearic acid, measure it by an analytical balance, and when weighing, first spread a piece of clean weighing paper on the surface of the analytical balance, Then zero-adjust the analytical balance. After the zero-adjustment is completed, put the stearic acid on the weighing paper for weighing. When the data on the analytical balance shows that it reaches 0.800g, remove the weighing paper containing the stearic acid. , and pour stearic acid into a beaker containing 20ml of anhydrous ethanol solution, and stir by a magnetic stirrer;

Step 3: Then weigh 1.5g of zinc oxide powder, then add the zinc oxide powder into the solution in beaker 1, and stir with a magnetic stirrer;

Step 4: Corona treatment is performed on the surface of the silicone rubber by using a high-voltage test device;

Step 5: Immediately apply the prepared solution 1 to the corona-treated silicone rubber surface with a brush, then put it into a blast drying oven to dry at 40°C for 30 minutes, and then take it out to dry at room temperature;

Step 6: Use the water spray classification method to conduct a water spray test on the surface of the silicone rubber insulator, and the surface of the silicone rubber shows a relatively round sphere.

As a further solution of the present invention: the weighing error of the analytical balance during weighing does not exceed 0.001 g.

As a further scheme of the present invention: when the stearic acid dissolves the absolute ethanol solution, the stirring time length is set as 10min.

As a further scheme of the present invention: the step of weighing the zinc oxide powder is consistent with the method of measuring the stearic acid in the first step.

As a further scheme of the present invention: the stirring time for uniformly mixing the zinc oxide and the stearic acid solution is set as 1h.

As a further scheme of the present invention: the electrode adopts a multi-needle electrode, the distance between the electrode and the surface of the silicone rubber is 1 cm, the AC voltage is 10 kV, and the corona treatment is performed for 1 h.

Compared with the prior art, the beneficial effects of the present invention are:

(1) The present invention uses a test transformer to perform corona treatment on the surface of the silicone rubber, so that the surface of the silicone rubber has a certain chemical activity, and then prepares a super-hydrophobic surface on the surface of the silicone rubber, so that the surface of the silicone rubber can be chemically bonded to the hydrophobic coating. The connection has strong adhesion and can maintain hydrophobicity for a long time;

(2) For the preparation of superhydrophobic coating, use stearic acid to dissolve in absolute ethanol, then add zinc oxide, mix evenly with magnetic stirring, apply the solution to the surface of silicone rubber, dry in a drying box, evaporate the absolute ethanol, Zinc oxide is formed on the surface of the silicone rubber as a supporting structure, and stearic acid wraps the zinc oxide, which can play a high superhydrophobicity;

(3) The present invention first performs corona treatment on the surface of the silicone rubber, and then prepares a solution of stearic acid, zinc oxide and anhydrous ethanol, and then evenly spreads it on the surface of the silicone rubber, and then dries it in a drying box, and then air-dries it naturally. Yes, the operation adopts a more conventional treatment method, and the corona treatment adopts a multi-needle electrode, which is convenient for operation.

Description of drawings

FIG. 1 is a diagram of a silicone rubber superhydrophobic surface prepared by a method for preparing a superhydrophobic surface on a silicone rubber surface.

FIG. 2 is a state diagram of water droplets on the surface of silicone rubber in a method for preparing a superhydrophobic surface on the surface of silicone rubber.

FIG. 3 is a state diagram of a single water droplet on the surface of silicone rubber in a method for preparing a superhydrophobic surface on the surface of silicone rubber.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

In the embodiment of the present invention, a method for preparing a superhydrophobic surface on a silicone rubber surface includes the following steps:

Step 1: Rinse the 10cm×10cm silicone rubber sample with deionized water and absolute ethanol respectively to wipe the surface dirt, and dry it naturally;

Step 2: measure the stearic acid of 0.800g, when taking stearic acid, measure it by an analytical balance, the weighing error of the analytical balance is not more than 0.001g when weighing, and when weighing, First, spread a piece of clean weighing paper on the surface of the analytical balance, and then zero the analytical balance. After zeroing, put the stearic acid on the weighing paper for weighing. When the data on the analytical balance reaches the 0.800g, remove the weighing paper containing stearic acid, pour stearic acid into a beaker containing 20ml of anhydrous ethanol solution, and stir with a magnetic stirrer for 10 minutes to make the Stearic acid is completely dissolved;

Step 3: then weigh 1.5g of zinc oxide powder, the steps of weighing zinc oxide powder are the same as the method for measuring stearic acid in step one, then add zinc oxide powder to the solution in beaker one, and stir it by a magnetic stirrer, The stirring time is 1 hour, so that the zinc oxide and the stearic acid solution are evenly mixed, which is recorded as solution 1;

Step 4: use a high-voltage test device to perform corona treatment on the surface of the silicone rubber, the electrode adopts a multi-needle electrode, the distance between the electrode and the surface of the silicone rubber is 1cm, the AC voltage adopts 10kV, and the corona treatment is performed for 1h to detect the hydrophobicity of the silicone rubber surface;

Step 5: Immediately apply the prepared solution 1 to the corona-treated silicone rubber surface with a brush, then put it into a blast drying oven to dry at 40°C for 30 minutes, and then take it out to dry at room temperature;

Step 6: Use the water spray classification method to conduct a water spray test on the surface of the silicone rubber insulator, and the surface of the silicone rubber shows a relatively round sphere.

Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, it is still possible to modify the technical solutions described in the foregoing embodiments, or to perform equivalent replacements for some of the technical features. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims (5)

1. a method for preparing superhydrophobic surface on silicone rubber surface, is characterized in that, comprises the steps: Step 1: Rinse the 10cm×10cm silicone rubber sample with deionized water and absolute ethanol respectively to wipe the dirt on the glass surface, and dry it naturally; Step 2: Measure 0.800g of stearic acid, when weighing stearic acid, measure it by an analytical balance, and when weighing, first spread a piece of clean weighing paper on the surface of the analytical balance, Then zero-adjust the analytical balance. After the zero-adjustment is completed, put the stearic acid on the weighing paper for weighing. When the data on the analytical balance shows that it reaches 0.800g, remove the weighing paper containing the stearic acid. , and pour stearic acid into a beaker containing 20ml of anhydrous ethanol solution, and stir by a magnetic stirrer; Step 3: Then weigh 1.5g of zinc oxide powder, then add the zinc oxide powder into the solution in beaker 1, stir it with a magnetic stirrer, and mark it as solution 1; Step 4: use a high-voltage test device to perform corona treatment on the surface of the silicone rubber, the electrode adopts a multi-needle electrode, the distance between the electrode and the surface of the silicone rubber is 1cm, the AC voltage adopts 10kV, and the corona treatment is performed for 1h; Step 5: Immediately apply the prepared solution 1 to the corona-treated silicone rubber surface with a brush, then put it into a blast drying oven to dry at 40°C for 30 minutes, and then take it out to dry at room temperature; Step 6: Use the water spray classification method to conduct a water spray test on the surface of the silicone rubber insulator, and the surface of the silicone rubber shows a relatively round sphere. 2. a kind of method for preparing superhydrophobic surface on silicone rubber surface according to claim 1, is characterized in that, the weighing error of described analytical balance when weighing is not more than 0.001g. 3. a kind of method for preparing super-hydrophobic surface on silicone rubber surface according to claim 1, is characterized in that, stirring duration is determined as 10min when stearic acid dissolves dehydrated alcohol solution. 4. a kind of method for preparing super-hydrophobic surface on silicone rubber surface according to claim 1, is characterized in that, the step of weighing zinc oxide powder is consistent with the method for measuring stearic acid in step 1. 5. a kind of method for preparing superhydrophobic surface on silicone rubber surface according to claim 1, is characterized in that, the stirring time that makes zinc oxide and stearic acid solution mix uniformly is set as 1h.

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