CN-118407143-B - Electrostatic spinning method of double-component silicone rubber

CN118407143BCN 118407143 BCN118407143 BCN 118407143BCN-118407143-B

Abstract

The invention discloses an electrostatic spinning method of double-component silicone rubber, which comprises the steps of partially dissolving raw materials of the silicone rubber into an organic solvent to prepare A, B two-component spinning precursor liquid, carrying out double-channel high-voltage electrostatic spinning in an electrostatic spinning device, and obtaining the silicone rubber with different performances by adjusting the proportion of A, B components, a cross-linking agent and the proportion of a catalyst and the raw materials. And respectively placing A, B component spinning solutions into a channel a and a channel b of an electrostatic spinning machine to carry out double-channel electrostatic spinning. The invention successfully carries out spinning on the raw materials of the silicone rubber to prepare the finished silicone rubber, solves the problem that the traditional silicone rubber is difficult to dissolve in polar and nonpolar solvents and cannot be subjected to electrostatic spinning, and realizes the breakthrough of the prior art.

Inventors

TAN QIAN
SONG YAQI
LI DAN
DENG HUA
LI ZHONGJUN
MA HUIJUAN
CHI RUAN

Assignees

湖北三峡实验室

Dates

Publication Date: 20260508
Application Date: 20240515

Claims (3)

1. An electrostatic spinning method of a double-component silicone rubber is characterized by comprising the following steps: Kneading vinyl silicone oil, hexamethyldisilazane and water in a kneader at 120-150 ℃ and naturally cooling to obtain a base rubber for silicone rubber spinning, wherein the mass parts of the raw materials are 100 parts of vinyl silicone oil with the viscosity of 4000-10000 mPa.s, 4-8 parts of hexamethyldisilazane, 2-4 parts of deionized water and 5-15 parts of white carbon black; The preparation method comprises the steps of dividing raw materials for preparing the silicone rubber into A, B components, dissolving a certain amount of base rubber in an organic solvent by a component A, adding a proper amount of cross-linking agent to prepare spinning solution A, dissolving a certain amount of base rubber in the organic solvent by a component B, adding a proper amount of catalyst to prepare spinning solution B, wherein the concentration of the spinning solution A and the concentration of the spinning solution B are 15-50%, the cross-linking agent is hydrogen-containing silicone oil, the adding amount of the cross-linking agent is 10-20%, the hydrogen content is 1-2%, the catalyst is a platinum-based catalyst, the adding amount of the catalyst is 5000-8000ppm, and the platinum content is 3000ppm; And thirdly, taking A, B components of spinning solution in the second step to respectively carry out double-channel high-voltage electrostatic spinning on two different a and b spinning channels to prepare the silicon rubber, wherein in the a and b double-channel high-voltage electrostatic spinning, the voltage of the a and b channels is kept to be 12-15kV, the push injection speed is 10-20mL/min, the receiving distance is 10-20cm, and the electrospinning temperature is 60-80 ℃ and the humidity is 20-50 percent in the high-voltage electrostatic spinning process.
2. The method for electrospinning a two-component silicone rubber according to claim 1, wherein the organic solvent in the second step is dichloromethane, dichloroethane or acetone.
3. The method according to claim 1, wherein the spinning solution a and the spinning solution B in the second step are of equal concentration or of unequal concentration.

Description

Electrostatic spinning method of double-component silicone rubber Technical Field The invention relates to an electrostatic spinning method and application of double-component silicone rubber, and belongs to the field of electrostatic spinning technology and application. Background The silicon rubber is a very important polymer material, has good electrical insulation, oxygen resistance, aging resistance, chemical stability and the like, has good high temperature resistance, and can be continuously used at 180-200 ℃. The method has wide application in the industrial fields of building industry, electronic industry, wire and cable, automobile industry, aerospace industry, photovoltaic industry and the like. And because the silicone rubber has good biocompatibility and better physical and mechanical properties, the silicone rubber can be used for manufacturing blood transfusion tubes, various cannulas, drainage tubes, cosmetic and repair materials, artificial skin, drug slow-release systems, biosensors and the like in the field of medical and health. The processing technology of the silicone rubber has three main modes of compression molding, injection molding and extrusion, and is limited in many application scenes. In the traditional processing technology, the formed silicone rubber is difficult to dissolve in a solvent, and if the non-formed raw materials are used for electrostatic spinning, the silicone rubber is easy to solidify in the spinning process, a spinning needle is blocked, and spinning cannot be performed. According to the invention, the electrostatic spinning technology is utilized to divide the raw materials of the silicone rubber into two components for spinning, the two components are solidified and molded on the receiving device, and the silicone rubber finished products with different shapes and thicknesses can be obtained by adjusting parameters, so that the application field of the silicone rubber is widened. Disclosure of Invention According to the invention, the raw materials of the silicone rubber are divided into two components by utilizing an electrostatic spinning technology, the two components are spun, and the two components are immediately solidified and molded on a receiving device, so that silicone rubber finished products with different shapes and thicknesses can be obtained by adjusting parameters, the problem that the traditional silicone rubber is difficult to dissolve in polar and nonpolar solvents and cannot be subjected to electrostatic spinning is solved, the breakthrough of the prior art is realized, the application field of the silicone rubber is widened, and the rapid development and popularization and application of the silicone rubber in each row are promoted. In order to achieve the aim, the technical scheme adopted by the invention is that the electrostatic spinning method and application of the double-component silicone rubber comprise the following steps: 100 parts of vinyl silicone oil with the viscosity of 4000-10000 mPa.s, 4-8 parts of hexamethyldisilazane, 2-4 parts of deionized water and 5-15 parts of white carbon black are kneaded in a kneader at 120-150 ℃ for 4 hours and then naturally cooled, so that the base rubber for spinning the silicone rubber is obtained. Step two, the raw materials for preparing the silicone rubber are divided into A, B components, a certain amount of base rubber is taken as the component A to be dissolved in an organic solvent, and a proper amount of cross-linking agent is added to prepare spinning solution A. And (3) dissolving a certain amount of base gum into an organic solvent, and adding a proper amount of catalyst into the solution to prepare spinning solution B. And thirdly, taking A, B components of the spinning solution in the second step to respectively carry out double-channel high-voltage electrostatic spinning on two different a and b spinning channels to prepare the silicone rubber. Wherein the cross-linking agent is hydrogen-containing silicone oil, the adding amount of the cross-linking agent is 10% -20%, and the hydrogen content is 1% -2%. The catalyst added in the experimental process is a platinum-based catalyst, the adding amount of the catalyst is 5000-8000ppm, and the platinum content is 3000ppm. The organic solvent for preparing the spinning precursor solution is dichloromethane, dichloroethane or acetone. The concentration of the prepared spinning solution is 15% -50%, and the spinning solution A and the spinning solution B can be of equal concentration or unequal concentration. In the high-voltage electrostatic spinning process, the voltage of the channel a and the channel b is kept to be consistent between 12 and 15kV, the pushing speed is consistent between 10 and 20mL/min, and the receiving distance is consistent between 10 and 20cm. The electrospinning temperature is 60-80 ℃ and the humidity is 20-50%. And receiving the mixed material of the double-channel spinning to obtain the silicon rubber fini