Preparation method of superconducting fluorosilica gel

Abstract

The invention discloses a preparation method of superconductive fluorosilica gel, and relates to the technical field of preparation of superconductive fluorosilica gel, the preparation method of superconductive fluorosilica gel is characterized in that the preparation process comprises the following steps: raw material mixing, reaction synthesis, precipitation, drying and sulfuration treatment, and the superconductive fluorosilica gel is finally obtained. The superconductive fluorosilica gel has excellent hardness, tensile strength, temperature resistance and corrosion resistance, is suitable for manufacturing various sealing products resistant to fuel oil, lubricating oil, hydraulic oil, solvents and the like in the aerospace field, has excellent conductivity, and has excellent application prospects in the electric power industry and the electronic industry. The coating can be used for surface coating of connecting parts, cables, conveying belts, fabrics and the like, and plays an important role in a plurality of high-end industrial fields.

Description

Technical Field

[0001] The invention relates to the technical field of superconducting fluorine silica gel preparation, in particular to a method for preparing superconducting fluorine silica gel. Background Art

[0002] Superconductive fluorosilicone is a special material that combines the properties of fluorosilicone and superconductivity. The conductive properties of conductive fluorosilicone are usually achieved by adding conductive fillers to the fluorosilicone matrix or using special manufacturing processes. These conductive fillers form a conductive network in the fluorosilicone matrix, giving the material a certain degree of conductivity.

[0003] The existing preparation process of superconducting fluorosilicone is relatively complicated and the preparation efficiency is low; therefore, we propose a preparation method of superconducting fluorosilicone to solve the above problems. Summary of the invention

[0004] The object of the present invention is to provide a method for preparing superconducting fluorosilicone to solve the problem that the existing superconducting fluorosilicone preparation process is relatively complicated and the preparation efficiency is low as mentioned in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solution: A method for preparing superconducting fluorosilicone, characterized in that: the preparation process is as follows: raw material mixing → reaction synthesis → precipitation → drying → sulfurization treatment

[0006] The specific preparation process includes the following

[0007] 1) Raw material mixing

[0008] Fluorosilicone, phenylene-containing siloxane and 2,4,6,8-tetramethyl-2,4,6,8-tetravinylcyclotetrasiloxane are taken in proportion using a precise metering device, and these raw materials are poured into a preparation box, and are fully mixed by a stirring device so that the raw materials can form a uniform basic fluorosilicone raw material in the preparation box, and then graphite powder and polyaniline are fully mixed in another preparation box, and the mixture of graphite powder and polyaniline is extracted and placed in a preparation box for fluorosilicone raw materials, and is fully mixed with the basic fluorosilicone raw material;

[0009] 2) Reaction synthesis

[0010] Fill the preparation box with nitrogen, start the heating element to heat the mixture to 110°C for 14 hours to form a fluorosilicone matrix and fully combine it with the conductive material;

[0011] 3) Precipitation

[0012] Add methanol about four times the volume of the sample to the reaction mixture, and then place the preparation box at 4°C for a period of time through a cooling element so that the methanol can fully act to precipitate the fluorosilicone matrix. Low temperature helps slow down the molecular movement and improve the precipitation efficiency.

[0013] 4) Drying

[0014] Taking out the precipitate, and placing the precipitate in a vacuum oven for reduced pressure drying to remove the solvent and unreacted substances;

[0015] 5) Sulfurization

[0016] Place the conductive fluorosilicone into a vulcanizing furnace to ensure that the silicone is heated evenly. Adjust the vulcanizing furnace to 200°C and keep it for several hours. After the vulcanization is completed, take it out and cool it at room temperature to finally obtain superconductive fluorosilicone.

[0017] Preferably, benzene solvent is added to the mixed raw material.

[0018] Preferably, tetramethylguanidine-2-ethylhexanoate is added to the mixed raw material.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] Superconductive fluorosilicone has excellent hardness and tensile strength as well as temperature resistance and corrosion resistance. It is suitable for the aerospace field for manufacturing various sealing products that are resistant to fuel oil, lubricating oil, hydraulic oil and solvents. At the same time, superconductive fluorosilicone has excellent electrical conductivity. In the electric power and electronics industries, it can be used for surface coating of connecting parts and cables, conveyor belts, fabrics, etc., and plays an important role in many high-end industrial fields. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the preparation method of the superconducting fluorine silica gel of the present invention; DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0023] See also Figure 1 The present invention provides an embodiment: a method for preparing superconducting fluorosilicone, characterized in that: the preparation process is as follows: raw material mixing → reaction synthesis → precipitation → drying → sulfurization treatment

[0024] The specific preparation process includes the following

[0025] 1) Raw material mixing

[0026] Fluorosilicone, phenylene-containing siloxane and 2,4,6,8-tetramethyl-2,4,6,8-tetravinylcyclotetrasiloxane are taken in proportion using a precise metering device, and these raw materials are poured into a preparation box, and are fully mixed by a stirring device so that the raw materials can form a uniform basic fluorosilicone raw material in the preparation box, and then graphite powder and polyaniline are fully mixed in another preparation box, and the mixture of graphite powder and polyaniline is extracted and placed in a preparation box for fluorosilicone raw materials, and is fully mixed with the basic fluorosilicone raw material;

[0027] 2) Reaction synthesis

[0028] Fill the preparation box with nitrogen, start the heating element to heat the mixture to 110°C for 14 hours to form a fluorosilicone matrix and fully combine it with the conductive material;

[0029] 3) Precipitation

[0030] Add methanol about four times the volume of the sample to the reaction mixture, and then place the preparation box at 4°C for a period of time through a cooling element so that the methanol can fully act to precipitate the fluorosilicone matrix. Low temperature helps slow down the molecular movement and improve the precipitation efficiency.

[0031] 4) Drying

[0032] Taking out the precipitate, and placing the precipitate in a vacuum oven for reduced pressure drying to remove the solvent and unreacted substances;

[0033] 5) Sulfurization

[0034] Place the conductive fluorosilicone into a vulcanizing furnace to ensure that the silicone is heated evenly. Adjust the vulcanizing furnace to 200°C and keep it for several hours. After the vulcanization is completed, take it out and cool it at room temperature to finally obtain superconductive fluorosilicone.

[0035] See also Figure 1 , benzene solvent is added to the mixed raw materials to dissolve the raw materials and promote the reaction.

[0036] See also Figure 1 , tetramethylguanidine-2-ethylhexanoate is added to the mixed raw materials to accelerate the reaction.

[0037] Test results:

[0038] Hardness test (Mpa) ＞80 Tensile strength test (Mpa) ＞110 Conductivity test (S / m) 10-6 Corrosion resistance test (mm / a) 0.001-0.1mm / a Temperature resistance test (℃) -70-200℃

[0039] According to the above test results, it can be concluded that superconductive fluorosilicone has excellent hardness and tensile strength as well as temperature resistance and corrosion resistance. It is suitable for the aerospace field for manufacturing various sealing products that are resistant to fuel oil, lubricating oil, hydraulic oil and solvents. At the same time, superconductive fluorosilicone has excellent electrical conductivity. In the electric power and electronics industries, it can be used for surface coating of connecting parts and cables, conveyor belts, fabrics, etc., and plays an important role in many high-end industrial fields.

[0040] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. A method for preparing superconducting fluorosilicone, characterized in that: The preparation process is as follows: raw material mixing → reaction synthesis → precipitation → drying → sulfurization treatment The specific preparation process includes the following 1) Raw material mixing Fluorosilicone, phenylene-containing siloxane and 2,4,6,8-tetramethyl-2,4,6,8-tetravinylcyclotetrasiloxane are taken in proportion using a precise metering device, and these raw materials are poured into a preparation box, and are fully mixed by a stirring device so that the raw materials can form a uniform basic fluorosilicone raw material in the preparation box, and then graphite powder and polyaniline are fully mixed in another preparation box, and the mixture of graphite powder and polyaniline is extracted and placed in a preparation box for fluorosilicone raw materials, and is fully mixed with the basic fluorosilicone raw material; 2) Reaction synthesis Fill the preparation box with nitrogen, start the heating element to heat the mixture to 110°C for 14 hours to form a fluorosilicone matrix and fully combine it with the conductive material; 3) Sedimentation Add methanol about four times the volume of the sample to the reaction mixture, and then place the preparation box at 4°C for a period of time through a cooling element so that the methanol can fully act to precipitate the fluorosilicone matrix. Low temperature helps slow down the molecular movement and improve the precipitation efficiency. 4) Drying Taking out the precipitate, and placing the precipitate in a vacuum oven for reduced pressure drying to remove the solvent and unreacted substances; 5) Sulfurization Place the conductive fluorosilicone into a vulcanizing furnace to ensure that the silicone is heated evenly. Adjust the vulcanizing furnace to 200°C and keep it for several hours. After the vulcanization is completed, take it out and cool it at room temperature to finally obtain superconductive fluorosilicone.

2. The method for preparing superconducting fluorosilicone according to claim 1, characterized in that: Benzene solvent was added to the mixed raw materials.

3. The method for preparing superconducting fluorosilicone according to claim 1, characterized in that: Tetramethylguanidine-2-ethylhexanoate was added to the mixed raw materials.

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