Organosilicon fiber and preparation method thereof

Abstract

The invention discloses an organic silicon fiber and a preparation method thereof in the technical field of organic silicon materials, raw materials of the organic silicon fiber comprise a silicone oil spinning solution and an additive, the silicone oil spinning solution comprises vinyl silicone oil and hydrogen-based silicone oil according to the mass ratio of 1: (0.8-1.4), the vinyl silicone oil comprises vinyl-terminated silicone oil and vinyl-side silicone oil, and the additive comprises vinyl-terminated silicone oil and hydrogen-based silicone oil. The addition amount of lateral vinyl silicone oil in the vinyl silicone oil is 0-20wt%; the additives comprise a catalyst, an inhibitor and a coordination dissociation agent. The vinyl-terminated silicone oil, the vinyl-side silicone oil and the hydrogen-based silicone oil are compounded in proportion to obtain the ternary silicone oil spinning solution, then the organosilicon fiber with excellent mechanical properties such as elasticity and strength is prepared by utilizing a high-temperature air induced crosslinking curing method, the method is non-toxic and environment-friendly, the method is simple, the processing period is greatly shortened, continuous production can be realized, and the production cost is reduced. The application of the organosilicon material besides silicone oil, silicone rubber and silicone resin is developed, and the organosilicon material is endowed with wider application.

Description

Technical Field

[0001] The present invention belongs to the technical field of organosilicon materials, and more specifically, relates to an organosilicon fiber and a preparation method thereof. Background Art

[0002] Silicone materials have the advantage of high temperature resistance and are the preferred materials for most new technologies. Preparing them into flexible and easy-to-process fibers has a wider range of applications. However, due to their own characteristics, silicone materials are difficult to achieve traditional melt spinning and solution spinning. However, cross-linking in the presence of a catalyst provides ideas for the fiberization of silicone materials. At present, there are still few strategies for cross-linking spinning of silicone materials. Most of the preparation strategies are template methods and oil bath curing methods, which not only make the preparation cost high, the process complicated, and difficult to achieve industrialization; but the fibers prepared by the oil bath method are uneven in thickness, which greatly affects the mechanical properties of the fibers. According to investigations, existing silicone fibers all use polydimethylsiloxane (PDMS) and corresponding curing agents as raw materials. The tensile strength of the fibers is generally low, which is difficult to meet the needs of actual applications.

[0003] The following are some of the problems with the existing technologies: Prior art methods for producing silicone fibers use PDMS prepolymer and a curing agent as raw materials, followed by mixing and heating in an oil bath. Fibers produced using this method exhibit irregular cross-sections and uneven thickness due to the influence of the oil bath's buoyancy during curing, resulting in poor gloss and a tensile strength of 2.7 to 9.2 MPa. Furthermore, the curing oil bath used in these experiments releases a small amount of toxic gases at high temperatures. Alternatively, silicone fibers are produced by mixing PDMS prepolymer and a curing agent, injecting them into a mold, curing them, and then ejecting them. While this mold method can artificially control the fiber's circular cross-section, it is costly and complex, and the length of the silicone fibers produced in a single batch is typically short. Furthermore, the tensile strength of the resulting fibers falls far short of practical requirements. Alternatively, spiral fibers produced using PDMS prepolymer and a curing agent using coaxial wet spinning also suffer from insufficient tensile strength.

[0004] Silicone fibers are cross-linked polymers, and the degree of cross-linking within them has an important influence on the mechanical properties of the fibers. The PDMS prepolymer used in existing reports is mainly polydimethylsiloxane, which has a low cross-linking density and a narrow distribution even after cross-linking; and the presence of methyl groups (-CH3) in the side chains of polydimethylsiloxane weakens the intermolecular forces, resulting in a decrease in molecular chain entanglement and a decrease in tensile strength. In addition, from a production process perspective, both the mold method and the oil bath method have filled the gap in the difficulty of preparing silicone fibers to a certain extent, but these methods have the disadvantages of low production efficiency and uneven fiber cross-sections, which causes the stress to be concentrated in the thinner parts of the fiber when subjected to external tensile force, resulting in breakage. Therefore, the preparation of silicone fibers with high tensile properties is still a challenge. Summary of the Invention

[0005] The purpose of the present invention is to address the above shortcomings and provide a silicone fiber and a preparation method thereof. The liquid silicone oil active component is heated by air, and is pulled and stretched during the cross-linking and curing reaction of the active component, thereby efficiently spinning the silicone fiber. The core technical problem solved is to ensure that the silicone oil active component is stable and fluid at room temperature, and is quickly cured under air heating conditions, and the curing rate is adjustable, thereby ensuring that it is completely cured and formed during the traction and stretching process to form a fiber.

[0006] To achieve the above object, the present invention is implemented through the following technical solutions: In a first aspect, the present invention provides an organosilicon fiber, the raw materials of which include silicone oil spinning solution and additives, the silicone oil spinning solution including vinyl silicone oil and hydrogen silicone oil in a mass ratio of 1: (0.8~1.4), the vinyl silicone oil including terminal vinyl silicone oil and side vinyl silicone oil, and the amount of side vinyl silicone oil added to the vinyl silicone oil is 0~20wt%; the additives include catalysts, inhibitors and coordination dissociation agents, each added in an amount of 0.1 wt%~1 wt% of the silicone oil spinning solution content.

[0007] Preferably, the mass ratio of the vinyl silicone oil to the hydrogen silicone oil is 1:(1.1-1.2), and the added amount of the lateral vinyl silicone oil in the vinyl silicone oil is 14 wt%-16 wt%.

[0008] Preferably, the vinyl-terminated silicone oil is a divinyl-terminated phenyl silicone oil having a viscosity of 500 cp to 3000 cp and a vinyl content of 0.8% to 1.2%; and includes one or more of α,ω-vinyl polymethylphenylsiloxane, α,ω-vinyl poly(methylphenylsiloxane-dimethylsiloxane), or α,ω-vinyl poly(dimethylsiloxane-diphenylsiloxane); preferably α,ω-vinyl polymethylphenylsiloxane having a viscosity of 950 to 1050 cp and a vinyl content of 0.8% to 1.2%; its structural formula is as follows: ; Among them, n is 30~300.

[0009] Preferably, the side vinyl silicone oil is a terminal polyvinylphenyl silicone oil with a viscosity of 500 cp~10000 cp and a vinyl content of 2.3%~2.7%; it includes one or more of α,ω-vinyl poly(methylphenylsiloxane-methylvinylsiloxane) or α,ω-vinyl poly(phenylvinylsiloxane-methylphenylsiloxane); preferably α,ω-vinyl poly(methylphenylsiloxane-methylvinylsiloxane), having a viscosity of 5000 cp and a vinyl content of 2.3%~2.7%; its structural formula is as follows: ; Among them, m is 50~500; n is 5~50.

[0010] Preferably, the hydrogen-based silicone oil is a side hydrogen-containing silicone oil, including α, ω-dimethyl polymethyl hydrogen siloxane, with a viscosity of 80 cp~100 cp, and the hydrogen content in the hydrogen-based silicone oil is 0.36%~1.6%; its structural formula is as follows: ; Among them, n is 20~100.

[0011] Preferably, the additive further comprises a filler, the filler is hydrophobic fumed silica, and the mass ratio of the filler to the spinning solution is 1:(5-99).

[0012] Preferably, the catalyst is a platinum catalyst, which includes any one of a Speier catalyst and a Karstedt catalyst, and the platinum concentration in the platinum catalyst is 1000 ppm to 10000 ppm; preferably, a Karstedt catalyst is used, and its structural formula is: .

[0013] Preferably, the inhibitor is any one of acetylene cyclohexanol, 2-methyl-3-butan-2-ol or butynediol, and the inhibitor concentration is 1000 ppm to 10000 ppm; wherein the structural formula of acetylene cyclohexanol is ; The structural formula of 2-methyl-3-butanol-2-alcohol is ; The structural formula of butynediol is: .

[0014] Preferably, the coordination dissociation agent is a borate ester, including methyl borate, ethyl borate, butyl borate or biboronic acid pinacol ester, and the coordination dissociation agent concentration is 1000 ppm to 10000 ppm; wherein the structural formula of methyl borate is ; The structural formula of ethyl borate is ; The structural formula of butyl borate is ; The structural formula of pinacol diborate is .

[0015] In a second aspect, the present invention provides a method for preparing the organosilicon fiber according to the first aspect, comprising: The vinyl silicone oil and hydrogen silicone oil are mixed evenly in proportion to prepare a silicone oil spinning solution; adding an inhibitor, a catalyst and a coordination dissociation agent to the obtained silicone oil spinning solution in sequence, stirring, and obtaining a spinning solution prepolymer; The spinning solution prepolymer is added into the spinning equipment, and is induced to crosslink and solidify by air heating, and then spun to obtain the product.

[0016] Preferably, the temperature of the silicone oil spinning solution during preparation is 0°C to 50°C, and the stirring rate is 100 to 1000 rpm; the temperature of the heating-induced cross-linking curing is 100°C to 250°C.

[0017] Preferably, the spinning equipment includes a constant pressure injection pump, a spinning head and an insulating bracket, a heating sleeve, a temperature control device and a collecting device. The spinning solution prepolymer is pushed into the spinning head by the constant pressure injection pump, and output to the collecting device through the spinning head for solidification and molding. The heating sleeve is arranged outside the spinning head, and the temperature control device is used to adjust the temperature of the heating sleeve so that the spinning solution is stretched and pulled when passing through the spinning head, and at the same time, it is heated by air to induce in-situ cross-linking and curing.

[0018] Compared with the prior art, the present invention has the following beneficial effects: The present invention combines vinyl-terminated silicone oil, vinyl-side silicone oil, and hydrogen-based silicone oil in a proportional mixture to create a ternary silicone oil spinning solution. The solution is then cross-linked and cured using high-temperature air. This method utilizes air heating, which is non-toxic and environmentally friendly, compared to oil bath heating, which can produce harmful gases. Furthermore, this method simplifies preparation, significantly shortens processing cycles, and allows for continuous production. The present invention uses air to heat the active component of liquid silicone oil, and then draws and stretches it during the crosslinking and curing reaction of the active component, thereby efficiently spinning silicone fibers. The core technical problem solved is to ensure that the active component of silicone oil is stable and fluid at room temperature, and to rapidly cure under air heating conditions with an adjustable curing rate, thereby ensuring complete curing and forming during the drawing and stretching process to form fibers. The present invention regulates the ratio of vinyl-terminated silicone oil, vinyl-side silicone oil, and hydrogen-based silicone oil in the ternary spinning solution to control the degree of internal crosslinking of the resulting organosilicon fibers, thereby obtaining organosilicon fibers with excellent mechanical properties such as elasticity and strength. This opens up uses for organosilicon materials beyond silicone oil, silicone rubber, and silicone resin, and gives organosilicon materials a wider range of applications. The present invention adds a coordination dissociation agent, borate, which can esterify with the alkynol inhibitor in the component under high temperature conditions, thereby further dissociating the inhibitor-platinum coordination and quickly releasing the platinum catalyst, thereby achieving rapid solidification, ensuring complete solidification during the fiber spinning and drawing process, and avoiding defects such as dripping and fiber deformation during the spinning process; The organosilicon fibers produced by the present invention exhibit excellent heat resistance and stability, are waterproof and breathable, and have good biocompatibility. Combined with the advantages of being braidable and woven, the organosilicon fibers produced by the present invention can be used as specialty fibers and specialty textiles. For example, organosilicon fibers can be woven into waterproof fabrics for use as industrial textiles for outdoor protection, such as tents, and used as umbrellas and raincoats. Due to their high-temperature resistance, organosilicon fibers can be used to produce high-temperature protective clothing fabrics or fabric-based high-temperature composite materials, as well as high-temperature thermochromic fabrics for signaling in high-temperature environments. Organosilicon fibers can also be used as medical textiles that come into direct contact with the human body. Because organosilicon fibers have excellent elasticity, blending them with other fibers can produce clothing or industrial textiles with excellent mechanical properties, such as elasticity. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the cross-linking reaction principle for preparing silicone fibers according to the present invention; Figure 2 A schematic diagram of the spinning process of an organosilicon fiber by the organosilicon fiber spinning device provided in an embodiment of the present invention; Figure 3 The ultra-depth-of-field 3D microscope and SEM images of the organosilicon fiber prepared in Example 1; (a1), (a2) are the cross-sectional SEM morphologies of SiF@H1, (a3) ​​is the morphology of the cross-sectional SiF@H1 under ultra-depth-of-field 3D microscope, (b1), (b2) are the SEM morphologies of the longitudinal surface of SiF@H1, and (b3) is the morphology of the longitudinal surface of SiF@H1 under ultra-depth-of-field 3D microscope; Figure 4Surface element distribution diagram of the organosilicon fiber prepared in Example 1; (a) and (b) are the element distributions of the cross section and longitudinal surface of SiF@H1, respectively; Figure 5 The tensile properties of silicone fibers prepared with hydrogen-based silicone oils with different hydrogen contents; Figure 6 Figure 1 is a diagram showing the effect of side vinyl silicone oil on the performance of silicone fibers, where (a) shows the effect of the viscosity and addition amount of end-side polyvinylphenyl silicone oil on the tensile properties of silicone fibers; (b) is a schematic diagram of different mass hooks for pulling the silicone fiber SiF@H1-15 (5000) prepared in Example 2; Figure 7 The fatigue resistance test diagram of the organic silicon fiber SiF@H1-15 (5000) prepared in Example 2, wherein (a) is the cyclic tensile performance test result of SiF@H1-15 (5000); (b) is the stress-strain curve of SiF@H1-15 (5000) before the first five cyclic stretching times; Figure 8 This is an electron microscope image of the silicone fiber prepared in Comparative Example 7.

[0020] In the figure: 1. Constant pressure injection pump; 2. Spinning head and insulation bracket; 3. Heating sleeve; 4. Temperature control device; 5. Collection device. DETAILED DESCRIPTION

[0021] Existing spinning methods primarily utilize the mold method and the oil bath curing method. The mold method involves injecting the mixed, to-be-cured spinning solution into a tube made of another material and then heating and curing it. Fibers produced using this method are generally relatively thick, and the length of fibers produced in a single batch is short. Furthermore, due to the difficulty of cleaning the interior of the mold, the fibers are generally only used once, resulting in high costs. The oil bath method utilizes the instantaneous curing of the spinning solution upon contact with a high-temperature oil bath, which, to some extent, addresses the limitations of the mold. However, it also presents the following challenges: (a) As a fluid, the spinning solution is subject to buoyancy upon contact with the oil bath. This, due to varying contact surface quality, ultimately results in a spindle-shaped cured fiber, accompanied by uneven fiber thickness. (b) While attempts to accelerate the curing of the spinning solution by increasing the oil bath temperature have been effective, the oil bath decomposes above 200°C, producing harmful gases that degrade the working environment. (c) Contamination of the fibers by the oil bath during contact with the spinning solution and the resulting fibers is also significant. Therefore, a highly efficient, non-toxic, and low-cost spinning method is needed.

[0022] Eliminating the complex operations of the mold method, using a high-temperature heat source to heat and solidify the silicone spinning solution is a better method for achieving rapid fiber forming. To avoid the impact of oil bath curing on the fiber morphology, the present invention designs a high-temperature air-induced cross-linking and curing method. A temperature-controlled annular heating sleeve is designed. When the temperature of the heating sleeve increases, the temperature of the surrounding air also increases rapidly. At this time, the silicone spinning solution is rapidly heated, solidified and cross-linked when it passes through the center of the heating sleeve at a certain rate. In this process, it is pulled and stretched to form a fiber material with controllable cross-section and diameter. The cross-section of the fiber prepared in this way can be regular and uniform in thickness. The spinning process does not involve heating other liquid media and almost no emission of harmful gases.

[0023] The preparation method of the organosilicon fiber provided by the present invention is as follows: (1) preparation of silicone oil spinning solution; (2) prepolymerization; (3) high-temperature air-induced cross-linking and curing into filaments. The specific steps are as follows: S1: Preparation of silicone oil spinning solution: Add vinyl-terminated silicone oil, side vinyl silicone oil and hydrogen silicone oil into the container in a certain proportion and stir to mix thoroughly; S2: Pre-polymerization: The uniformly mixed silicone oil spinning solution in S1 is placed in a constant temperature water bath, and the inhibitor, catalyst and coordination dissociation agent are added dropwise in sequence, and stirred at a certain rate to prepolymerize the spinning solution to a spinnable state; S3: High temperature air induced cross-linking and curing into filaments: The spinning solution prepolymer obtained in S2 is poured into the spinning equipment and cured into filaments by high temperature air induction cross-linking to obtain silicone fiber. The cross-linking reaction in this process is as follows: Figure 1 shown.

[0024] During the above reaction process, the presence of the inhibitor can block the platinum catalyst, thereby slowing down the rate of the hydrosilylation reaction, providing a longer pot life, and allowing the spinning solution to be stored for a long time. By adjusting the temperature of the spinning equipment to instantly increase the temperature of the spinning solution, the catalyst is released to re-catalyze the hydrosilylation reaction, allowing the spinning solution to solidify into yarn in a short period of time. At the same time, due to the addition of a borate ester coordination dissociation agent to the component, it undergoes an ester exchange reaction with the inhibitor at high temperature, which can cause the inhibitor to quickly dissociate from the platinum coordination structure, releasing the platinum catalyst to catalyze the hydrosilylation cross-linking reaction. In this process, the alkynol inhibitor reaches a dynamic equilibrium with the catalyst and the borate ester coordination dissociation agent through ester exchange reaction and coordination reaction under high temperature conditions as follows: .

[0025] The preferred embodiments of the present invention will be described in more detail below with reference to the accompanying drawings and specific examples.

[0026] Unless otherwise specified, the experimental methods used in the following examples are conventional methods, and the materials and reagents used are all commercially available unless otherwise specified.

[0027] The raw materials used in the specific examples are as follows: Vinyl-terminated silicone oil: α, ω-vinyl polymethylphenylsiloxane, 1000 cp, Guoyan Chemical New Materials Co., Ltd. Pendant vinyl silicone oil: α,ω-vinyl poly(methylphenylsiloxane-methylvinylsiloxane), 5000 cp, Guoyan Chemical New Materials Co., Ltd. Hydrogen-based silicone oil: α, ω-dimethyl polymethyl hydrogen siloxane, hydrogen content 0.75%, Shenzhen Jipeng Silicone Fluoride Materials Co., Ltd. Inhibitor: Weigh 0.05 g of butynediol (Shanghai Aladdin Biochemical Technology Co., Ltd.) and add isopropanol. Use a volumetric flask to dilute to 10 mL to prepare a solution with an alkynol concentration of 5000 ppm. Coordination dissociation agent: Weigh 0.05 g of dipinacolato borate (Shanghai Aladdin Biochemical Technology Co., Ltd.) and add isopropanol. Use a volumetric flask to dilute to 10 mL to prepare a solution with a borate ester coordination dissociation agent concentration of 5000 ppm. Catalyst: Karstedt catalyst, platinum content 3000 ppm, Shenzhen Kejunchi Industrial Co., Ltd.

[0028] The measurement method in the following embodiment includes: (1) The mechanical properties of the prepared silicone fiber were tested using an INSTRON-3365 dual-arm material testing machine. According to the national standard GB / T 14337-2022 for the tensile properties of chemical fiber staple fibers, the fibers were cut into 4 cm lengths and wrapped with label paper at both ends. The sensor range used in the test was 0~8 N, and the tensile speed was 4 cm·min -1 , with a gauge length of 2 cm. To ensure more accurate measurements, each fiber sample was tested 20 times to obtain the average tensile strength and elongation at break. Furthermore, maintaining a constant stretch rate, the fibers were subjected to 150 cycles of stretching at 100% elongation to investigate the fatigue resistance of SiF.

[0029] (2) Linear density is one of the most important indicators used to characterize fiber thickness. Commonly used units are tex (Nt), decitex (Ndt) and denier (ND). Measure and cut a length of silicone fiber, place it on an electronic balance to accurately weigh the fiber mass, and then calculate the linear density of the silicone fiber using the formula as follows: ; Where: L is the length of the fiber (m), m is the mass of the fiber (g).

[0030] (3) The crosslinking density of the fiber under different amounts of side vinyl silicone oil can be tested by the toluene swelling method. First, a length of fiber is cut and weighed, and then immersed in toluene solution for 72 hours to ensure sufficient swelling. After 72 hours, the toluene solution remaining on the fiber surface is wiped dry with filter paper and weighed immediately. The crosslinking density is calculated as follows: ; ; Where: ρ1 is the fiber density (g·mL -1 ), ρ2 is the density of toluene (g·mL -1 ), w1, w2 are the mass before and after swelling (g), v e is the cross-linking density, and v0 is the molar volume of toluene.

[0031] Example 1: This embodiment provides an organosilicon fiber, and the preparation method thereof comprises the following steps: S1: Preparation of silicone oil spinning solution Take a clean container, add 37.8 g of α, ω-vinyl polymethylphenylsiloxane (1000 cp) and 2.2 g of α, ω-dimethyl polymethyl hydrogensiloxane (hydrogen content 0.75%), mix the silicone oil evenly at a stirring rate of 500 rpm to obtain a silicone oil spinning solution.

[0032] S2: Pre-polymerization Subsequently, the mixed silicone oil spinning solution was placed in a constant temperature water bath, and the inhibitor acetylene butanediol was added at a concentration equivalent to 0.1% of the total mass of the silicone oil, and stirred for 5 minutes to ensure that the inhibitor was evenly distributed in the spinning solution. Then, 3000 ppm of platinum catalyst Karstedt and dipinacolato borate equivalent to 0.1% of the total mass of the silicone oil were added. The system temperature was controlled at 25°C and stirred at a speed of 150 rpm for about 15 minutes to prepolymerize the spinning solution to a spinnable state.

[0033] S3: High temperature air induced cross-linking and curing into filaments After the spinning solution prepolymer is fully degassed, it is added to the spinning equipment. The spinning equipment used in this embodiment is as follows: Figure 2As shown, it includes a constant pressure injection pump 1, a spinning head and an insulating bracket 2, a heating sleeve 3, a temperature control device 4 and a collecting device 5. The spinning process is that the spinning liquid prepolymer is pushed into the spinning head through the constant pressure injection pump 1, and is output to the collecting device 5 through the spinning head for curing and molding. The heating sleeve 3 is sleeved on the outside of the spinning head, and the temperature control device 4 is used to adjust the temperature of the heating sleeve 3 so that the spinning liquid prepolymer is stretched and pulled when passing through the spinning head, and at the same time, it is heated by air to induce in-situ cross-linking and curing.

[0034] Specifically, the spinning solution prepolymer prepared in S2 was fully degassed and poured into a 50 mL syringe, which was clamped on a constant pressure syringe pump 1. The propulsion speed of the constant pressure syringe pump 1 was set to 0.65 mL min. -1 The actual heating temperature at the center of the heating sleeve was measured to be approximately 200°C to 220°C. As the spinning solution prepolymer passed through the heating sleeve at a constant speed, it was stretched and pulled while undergoing in-situ crosslinking and curing. Upon entering the rotating collection cage, it was fully cured, resulting in a silicone fiber product, codenamed SiF@H1.

[0035] The morphology and structure of the organic silicon fiber SiF@H1 prepared in this example are as follows Figure 3 As shown, from Figure 3 It can be seen from the figure that the cross section of the organic silicon fiber is regular and circular and longitudinally smooth; the surface element distribution of SiF@H1 is as follows Figure 4 As shown in the figure, the silicone fiber is composed of three elements: Si, O, and C. The fiber diameter was measured at 10 different points on the same fiber, and the average diameter of the silicone fiber SiF@H1 was calculated to be 300±13 μm. The tensile strength of SiF@H1 was measured by a double-arm material testing machine and was 0.65 cN·tex. -1 , the elongation at break is 518.47%.

[0036] Comparative Example 1: This comparative example provides an organosilicon fiber, the preparation method of which comprises the following steps: S1: Preparation of silicone oil spinning solution Take a clean container, add 35.6g of α, ω-vinyl polymethylphenylsiloxane (1000 cp) and 4.4g of α, ω-dimethyl polymethyl hydrogen siloxane (hydrogen content 0.36%), mix the silicone oil evenly at a stirring rate of 500 rpm to obtain a silicone oil spinning solution.

[0037] S2: Pre-polymerization Subsequently, the mixed silicone oil spinning solution was placed in a constant temperature water bath, and the inhibitor acetylene butanediol was added at a concentration equivalent to 0.1% of the total mass of the silicone oil, and stirred for 5 minutes to ensure that the inhibitor was evenly distributed in the spinning solution. Then, 3000 ppm of platinum catalyst Karstedt and dipinacolato borate equivalent to 0.1% of the total mass of the silicone oil were added. The system temperature was controlled at 25°C and stirred at a speed of 150 rpm for about 15 minutes to prepolymerize the spinning solution to a spinnable state.

[0038] S3: High temperature air induced cross-linking and curing into filaments The spinning equipment described in Example 1 was used to fully degas the spinning solution prepolymer prepared in S2 and then poured into a 50 mL syringe, which was clamped on a constant pressure syringe pump 1. The propulsion speed of the constant pressure syringe pump 1 was set to 0.65 mL min. -1 The actual heating temperature at the center of the heating sleeve was measured to be approximately 200°C to 220°C. As the spinning solution passed through the heating sleeve at a constant speed, it was stretched and pulled while undergoing in-situ crosslinking and curing. Upon entering the rotating collection cage, it was fully cured, resulting in a silicone fiber product, codenamed SiF@H0. Testing using a dual-arm material testing machine revealed a tensile strength of 0.24 cN·tex. -1 , the elongation at break is 616.19%.

[0039] Comparative Example 2: This comparative example provides an organosilicon fiber, the preparation method of which comprises the following steps: S1: Preparation of silicone oil spinning solution Take a clean container, add 38.3g of α, ω-vinyl polymethylphenylsiloxane (1000 cp) and 1.7g of α, ω-dimethyl polymethyl hydrogen siloxane (hydrogen content 1.0%), mix the silicone oil evenly at a stirring rate of 500 rpm to obtain a silicone oil spinning solution.

[0040] S2: Pre-polymerization Subsequently, the mixed silicone oil spinning solution was placed in a constant temperature water bath, and the inhibitor acetylene butanediol was added at a concentration equivalent to 0.1% of the total mass of the silicone oil, and stirred for 5 minutes to ensure that the inhibitor was evenly distributed in the spinning solution. Then, 3000 ppm of platinum catalyst Karstedt and dipinacolato borate equivalent to 0.1% of the total mass of the silicone oil were added. The system temperature was controlled at 25°C and stirred at a speed of 150 rpm for about 15 minutes to prepolymerize the spinning solution to a spinnable state.

[0041] S3: High temperature air induced cross-linking and curing into filaments The spinning equipment described in Example 1 was used to fully degas the spinning solution prepolymer prepared in S2 and then poured into a 50 mL syringe, which was clamped on a constant pressure syringe pump 1. The propulsion speed of the constant pressure syringe pump 1 was set to 0.65 mL min. -1 The actual heating temperature at the center of the heating sleeve was measured to be approximately 200°C to 220°C. As the spinning solution passed through the heating sleeve at a constant speed, it was stretched and pulled while undergoing in-situ crosslinking and curing. Upon entering the rotating collection cage, it was fully cured, resulting in a silicone fiber product, codenamed SiF@H2. Testing on a dual-arm material testing machine revealed a tensile strength of 0.53 cN·tex. -1 , the elongation at break is 489.54%.

[0042] Comparative Example 3: This comparative example provides an organosilicon fiber, the preparation method of which comprises the following steps: S1: Preparation of silicone oil spinning solution Take a clean container, add 39.0 g of α, ω-vinyl polymethylphenylsiloxane (1000 cp) and 4.4 g of α, ω-dimethyl polymethyl hydrogen siloxane (hydrogen content 1.6%), mix the silicone oil evenly at a stirring rate of 500 rpm to obtain a silicone oil spinning solution.

[0043] S2: Pre-polymerization Subsequently, the mixed silicone oil spinning solution was placed in a constant temperature water bath, and the inhibitor acetylene butanediol was added at a concentration equivalent to 0.1% of the total mass of the silicone oil, and stirred for 5 minutes to ensure that the inhibitor was evenly distributed in the spinning solution. Then, 3000 ppm of platinum catalyst Karstedt and dipinacolato borate equivalent to 0.1% of the total mass of the silicone oil were added. The system temperature was controlled at 25°C and stirred at a speed of 150 rpm for about 15 minutes to prepolymerize the spinning solution to a spinnable state.

[0044] S3: High temperature air induced cross-linking and curing into filaments The spinning equipment described in Example 1 was used to fully degas the spinning solution prepolymer prepared in S2 and then poured into a 50 mL syringe, which was clamped on a constant pressure syringe pump 1. The propulsion speed of the constant pressure syringe pump 1 was set to 0.65 mL min. -1 The actual heating temperature at the center of the heating sleeve was measured to be approximately 200°C to 220°C. As the spinning solution passed through the heating sleeve at a constant speed, it was stretched and pulled while undergoing in-situ crosslinking and curing. Upon entering the rotating collection cage, it was fully cured, resulting in a silicone fiber product, codenamed SiF@H3. Testing on a dual-arm material testing machine revealed a tensile strength of 0.15 cN·tex. -1 , the elongation at break is 334.46%.

[0045] The effect of the hydrogen content of hydrogen-based silicone oil on the mechanical properties of silicone fibers was analyzed through Example 1, Comparative Example 1, Comparative Example 2 and Comparative Example 3: The hydrogen content of hydrogen-based silicone oil reflects the number of active sites that can undergo hydrosilylation with -CH=CH2. Therefore, this application systematically studies the effect of the hydrogen content of hydrogen-based silicone oil on the mechanical properties of fibers. Figure 5 The tensile properties of silicone fibers prepared with hydrogen-based silicone oils of different hydrogen contents are shown in the figure. As shown in the figure, when the hydrogen content of the hydrogen-based silicone oil is 0.36%, the tensile strength of the prepared SiF@H0 is low, only about 0.24 cN·tex. -1 . However, the elongation at break is very high, reaching more than 600%. With the increase of hydrogen content, the tensile strength of the fiber first increases and then decreases. This is because when the hydrogen content is low (0.36%), only a few crosslinks occur inside SiF@H0. At this time, when the load is applied to both ends of the fiber, the internal macromolecules are not bound and can be freely oriented and stretched, thus having higher elongation properties. The small number of crosslinking points results in fewer load-bearing molecular chains per unit area, resulting in very low tensile strength of the fiber, and the application value of such fibers is very low. When the hydrogen content in hydrogenated silicone oil increases to 0.75%, the crosslinking points are close to each other, the crosslinking density increases, and the more crosslinking nodes per unit area are subjected to external stress, the greater the strength of the fiber. Therefore, the strength of the fiber increases, and the strength of SiF@H1 reaches 0.65 cN·tex -1 However, when the hydrogen content of silicone oil is too high, the cross-linking points will appear too dense, which will shorten the distance between the cross-linking chains. The uniformity of the cross-linking point distribution will decrease, resulting in the phenomenon of local over-dense cross-linking. When subjected to external force, there are few molecular chains that can jointly withstand the external stress. In this case, the molecular chains of the fiber are easily damaged by the external stress concentration, resulting in a decrease in tensile strength (such as SiF@H2 and SiF@H3). On the contrary, the elongation at break of the fiber shows a downward trend as the hydrogen content of hydrogen-based silicone oil increases.

[0046] Example 2: Effect of the Addition Amount and Viscosity of Side Vinyl Silicone Oil on Mechanical Properties This embodiment provides an organosilicon fiber, and the preparation method thereof comprises the following steps: S1: Preparation of silicone oil spinning solution Take a clean container and add 32.5 g of α, ω-vinyl polymethylphenylsiloxane (1000 cp), 4.8 g of α, ω-vinyl poly (methylphenylsiloxane-methylvinylsiloxane) (5000 cp) and 2.6 g of α, ω-dimethyl polymethylhydrogensiloxane (hydrogen content 0.75%), and mix the silicone oil evenly at a stirring rate of 500 rpm.

[0047] S2: Pre-polymerization Subsequently, the mixed silicone oil spinning solution was placed in a constant temperature water bath, and the inhibitor acetylene butanediol was added at a concentration equivalent to 0.1% of the total mass of the silicone oil, and stirred for 5 minutes to ensure that the inhibitor was evenly distributed in the spinning solution. Then, 3000 ppm of platinum catalyst Karstedt and dipinacolato borate equivalent to 0.1% of the total mass of the silicone oil were added. The system temperature was controlled at 25°C and stirred at a speed of 150 rpm for about 15 minutes to prepolymerize the spinning solution to a spinnable state.

[0048] S3: High temperature air induced cross-linking and curing into filaments The spinning equipment described in Example 1 was used to fully degas the spinning solution prepolymer prepared in S2 and then poured into a 50 mL syringe, which was clamped on a constant pressure syringe pump 1. The propulsion speed of the constant pressure syringe pump 1 was set to 0.65 mL min. -1 The actual heating temperature at the center of the heating sleeve was measured to be approximately 200°C to 220°C. The resulting silicone fiber product was codenamed SiF@H1-15 (5000). Testing using a double-arm material testing machine revealed a tensile strength of 1.14 cN·tex. -1 , the elongation at break is 248.50%, and a single fiber can easily lift a 150 g hook. Figure 6 In addition, SiF@H1-15 also has excellent cyclic tensile properties. After being stretched 150 times at 100% elongation, it still has good mechanical properties. Figure 7 shown.

[0049] Example 3: Effect of the Addition Amount of Side Vinyl Silicone Oil on the Mechanical Properties of Silicone Fibers This embodiment provides an organic silicone fiber. Except that the amount of α, ω-vinyl polymethylphenylsiloxane (1000 cp) is 35.7 g and the amount of α, ω-vinyl poly (methylphenylsiloxane-methylvinylsiloxane) (5000 cp) is 1.6 g, the other component proportions and preparation methods are the same as those in Example 2. The obtained organic silicone fiber product is code-named SiF@H1-5 (5000). The tensile strength of SiF@H1-5 (5000) was 0.77 cN·tex as measured by a double-arm material testing machine. -1 , the elongation at break is 375.17%.

[0050] Example 4: Effect of the Addition Amount of Side Vinyl Silicone Oil on the Mechanical Properties of Silicone Fibers This embodiment provides an organic silicone fiber. Except that the amount of α,ω-vinyl polymethylphenylsiloxane (1000 cp) is 33.1 g and the amount of α,ω-vinyl poly(methylphenylsiloxane-methylvinylsiloxane) (5000 cp) is 3.2 g, the amounts of other components and the preparation method are the same as those in Example 2. The obtained organic silicone fiber product is code-named SiF@H1-10 (5000). The tensile strength of SiF@H1-10 (5000) was 1.07 cN·tex as measured by a double-arm material testing machine. -1 , the elongation at break is 317.12%.

[0051] Comparative Example 4: Effect of the viscosity of vinyl silicone oil on the mechanical properties of silicone fibers This comparative example provides an organosilicon fiber, the preparation method of which comprises the following steps: S1: Preparation of silicone oil spinning solution Take a clean container and add 32.5 g of α, ω-vinyl polymethylphenylsiloxane (1000 cp), 4.8 g of α, ω-vinyl poly (methylphenylsiloxane-methylvinylsiloxane) (500 cp) and 2.6 g of α, ω-dimethyl polymethylhydrogensiloxane (hydrogen content 0.75%) in sequence, and mix the silicone oil evenly at a stirring rate of 500 rpm.

[0052] S2: Pre-polymerization Subsequently, the mixed silicone oil spinning solution was placed in a constant temperature water bath, and the inhibitor acetylene butanediol was added at a concentration equivalent to 0.1% of the total mass of the silicone oil, and stirred for 5 minutes to ensure that the inhibitor was evenly distributed in the spinning solution. Then, 3000 ppm of platinum catalyst Karstedt and dipinacolato borate equivalent to 0.1% of the total mass of the silicone oil were added. The system temperature was controlled at 25°C and stirred at a speed of 150 rpm for about 15 minutes to prepolymerize the spinning solution to a spinnable state.

[0053] S3: High temperature air induced cross-linking and curing into filaments The spinning equipment described in Example 1 was used to fully degas the spinning solution prepolymer prepared in S2 and then poured into a 50 mL syringe, which was clamped on a constant pressure syringe pump 1. The propulsion speed of the constant pressure syringe pump 1 was set to 0.65 mL min. -1 The actual heating temperature at the center of the heating sleeve was measured to be approximately 200°C to 220°C. The resulting silicone fiber product was codenamed SiF@H1-15 (500). The tensile strength of SiF@H1-15 (500) was 0.47 cN·tex as measured by a double-arm material testing machine. -1 , the elongation at break is 428.87%.

[0054] Comparative Example 5: Effect of the viscosity of vinyl silicone oil on the mechanical properties of silicone fibers This comparative example provides an organosilicon fiber, the preparation method of which comprises the following steps: S1: Preparation of silicone oil spinning solution Take a clean container and add 32.5 g of α, ω-vinyl polymethylphenylsiloxane (1000 cp), 4.8 g of α, ω-vinyl poly (methylphenylsiloxane-methylvinylsiloxane) (1000 cp) and 2.6 g of α, ω-dimethyl polymethylhydrogensiloxane (hydrogen content 0.75%) in sequence, and mix the silicone oil evenly at a stirring rate of 500 rpm.

[0055] S2: Pre-polymerization Subsequently, the mixed silicone oil spinning solution was placed in a constant temperature water bath, and the inhibitor acetylene butanediol was added at a concentration equivalent to 0.1% of the total mass of the silicone oil, and stirred for 5 minutes to ensure that the inhibitor was evenly distributed in the spinning solution. Then, 3000 ppm of platinum catalyst Karstedt and dipinacolato borate equivalent to 0.1% of the total mass of the silicone oil were added. The system temperature was controlled at 25°C and stirred at a speed of 150 rpm for about 15 minutes to prepolymerize the spinning solution to a spinnable state.

[0056] S3: High temperature air induced cross-linking and curing into filaments The spinning equipment described in Example 1 was used to fully degas the spinning solution prepolymer prepared in S2 and then poured into a 50 mL syringe, which was clamped on a constant pressure syringe pump 1. The propulsion speed of the constant pressure syringe pump 1 was set to 0.65 mL min. -1 The actual heating temperature at the center of the heating sleeve was measured to be approximately 200°C. The resulting silicone fiber product is codenamed SiF@H1-15(1000). The tensile strength of SiF@H1-15(1000) was measured to be 0.55 cN·tex using a double-arm material testing machine. -1 , the elongation at break is 361.78%.

[0057] The effects of the viscosity and addition amount of vinyl-terminated polyvinylphenyl silicone oil on the mechanical properties of organosilicon fibers were analyzed by Example 1, Example 2, Example 3, Example 4, Comparative Example 4 and Comparative Example 5. Although changing the hydrogen content of hydrogen-based silicone oil can improve the tensile strength of silicone fiber to a certain extent, the effect of improving strength is limited due to the small molecular weight and low cross-linking point distribution of terminal vinyl silicone oil. Therefore, the mechanical properties of the fiber are further improved by introducing side vinyl silicone oil and significant results have been achieved. Figure 6(a) is a comparison of the mechanical properties of fibers with different side vinyl silicone oil viscosities and addition amounts. From the figure, it can be seen that the strength of the silicone fiber without side vinyl silicone oil is lower and the elongation at break is also higher. However, after adding 5 wt%, 10 wt% and 15 wt% side vinyl silicone oil (5000 cp), the tensile strength also gradually increases, reaching 0.77 cN·tex and 0.87 cN·tex, respectively. -1 , 1.07 cN·tex -1 and 1.14 cN·tex -1 , SiF@H1-15 (5000) achieves the best mechanical properties. This is because with the addition of side vinyl silicone oil, more crosslinks can be formed within the fiber molecules. Calculations show that the crosslinking degrees of SiF@H1, SiF@H1-5 (5000), SiF@H1-10 (5000), and SiF@H1-15 (5000) are 0.15, 0.30, 0.42, and 0.68, respectively. This result is consistent with theoretical analysis. Under the action of tension, the fiber macromolecules will first undergo a moderate elongation of the molecular chain segments to adapt to the external force, but due to the limitation of crosslinking, the fiber molecules will turn to jointly bear the external force after elongation to a certain extent, thereby increasing the strength. When the addition amount of side vinyl silicone oil exceeds 15 wt%, it will be difficult to quickly solidify during the spinning process, which may be caused by the structure of the side vinyl silicone oil. Compared with vinyl-terminated silicone oil, the vinyl and phenyl groups of vinyl-side silicone oil are close to each other. It is well known that phenyl is a group with great steric hindrance, which will hinder the reaction of Si-CH=CH2 and Si-H, making it difficult to cross-link and form within the specified curing time.

[0058] In order to more intuitively reflect the strength of SiF@H1-15 (5000), the SiF@H1-15 (5000) single fiber was pulled by weights of different masses. Figure 6 As shown in (b), SiF@H1-15 (5000) can easily lift a 150 g weight, demonstrating a significant improvement in strength after incorporation of the vinyl-containing silicone oil. Furthermore, the elongation at break of SiF@H1-15 (5000) has decreased to approximately 250%, maintaining excellent elongation. Overall, SiF@H1-15 (5000) exhibits the best mechanical properties.

[0059] The strength of the fibers prepared by adding side vinyl silicone oils with viscosities of 500 cp and 1000 cp increased slightly and then began to decline. This may be because when the viscosity of the side vinyl silicone oil is low, the cross-linking points are distributed more densely. At this time, the movement of the fiber molecular chains is restricted under the action of external force, resulting in a decrease in tensile strength.

[0060] The cyclic tensile properties of silicone fiber SiF@H1-15 (5000) cannot be ignored in practical applications, such as Figure 7 As shown in (a), during the overall 150 cycles and 100% cyclic stretching process, the tensile strength of SiF@H1-15 (5000) remained basically unchanged, with a tensile strength of about 0.13 N. After 150 cycles, the strength still maintained a good result. In order to observe the stress-strain relationship during the cyclic stretching process in more detail, Figure 7 (b) Stress-strain curves for the first five cycles of SiF@H1-15 (5000) are shown. Interestingly, the stress-strain curve exhibits a slight hysteresis after the first stretching cycle, resulting in a slight decrease in tensile strength at the same elongation. This phenomenon does not occur after the second cycle. Excluding slippage at the ends of the supports, we analyze the following reasons. First, under the application of external force, the fiber molecular chains continuously adjust to the external load, which requires overcoming intermolecular friction. After the first stretching cycle, the rearrangement of the silicone macromolecules increases their order compared to the initial state, resulting in a slight decrease in strength during subsequent stretching cycles. Furthermore, during the first stretching cycle, some molecular chains fail to realign in response to the external force and break, which also results in a decrease in stress after stretching. However, the mechanical properties of SiF@H1-15 (5000) remain excellent throughout the 150 stretching cycles, demonstrating excellent fatigue resistance and meeting practical application requirements.

[0061] Comparing the preparation methods and properties of the organosilicon fibers prepared in this example with those reported in the prior art, as shown in Table 1, it can be found that the previously reported organosilicon fibers were mostly prepared using the mold method and oil bath curing method, which resulted in uneven fiber thickness and low production efficiency. In addition, the strength of these reported organosilicon fibers was generally low, limiting their application scenarios. In contrast, the SiF@H1-15 (5000) prepared in this example not only has a circular, uniform cross-section in appearance, but also has a significant improvement in tensile strength performance, all of which is due to the controllable degree of crosslinking within the fiber.

[0062] Table 1: Performance comparison of SiF@H1-15 (5000 cp) and previously reported organic silicon fibers

[0063] Note: The sources of the above other reports are as follows: [1] Highly flexible and stretchable optical strain sensing for humanmotion detection. Optica, 2017, 4(10): 1285-1288 [2] Flexible and Optical Fiber Sensors Composited by Graphene andPDMS for Motion Detection. Polymers, 2019, 11(9):1433 [3] Sugar-plastic assisted fabrication of hollow PDMS wearablefabrics toward excellent sensory capabilities . Journal of MaterialsChemistry A, 2024, 12(12): 7237-7247 [4] Rapid mold-free fabrication of long functional PDMS fibers. NPGAsia Materials, 2022, 14(1): 13 [5] Wang Ruhai. Preparation of silicone fiber and its application in wearable devices. Master's degree thesis, Xi'an University of Technology, 2024 [6] Li Lele. Preparation and application of high-performance PDMS fiber-based flexible strain sensors. Doctoral dissertation, Tianjin University, 2022.

[0064] Example 5: Improvement effect of fillers on mechanical properties of silicone fibers This embodiment provides an organic silicon fiber. In addition to adding 2 wt% of hydrophobic fumed silica during the preparation of the silicone oil spinning solution, the other component amounts and preparation methods are the same as in Example 2. The tensile strength of the filler-doped SiF@H1-15(5000)-2 obtained is 1.08 cN·tex -1 .

[0065] Comparative Example 6: Spinning was unsuccessful without adding a coordination dissociation agent, and the fibers were discontinuous. This comparative example provides an organosilicon fiber, the preparation method of which comprises the following steps: S1: Preparation of silicone oil spinning solution Take a clean container, add 37.8 g of divinyl-terminated phenyl silicone oil (1000 cp) and 2.2 g of hydrogen-based silicone oil (hydrogen content 0.75%), and mix the silicone oil evenly at a stirring rate of 500 rpm.

[0066] S2: Pre-polymerization Subsequently, the mixed silicone oil spinning solution was placed in a constant temperature water bath, and the inhibitor acetylene butanediol equivalent to 0.1% of the total mass of the silicone oil was added and stirred for 5 minutes to ensure that the inhibitor was evenly distributed in the spinning solution; then 3000 ppm of platinum catalyst Karstedt was added, the system temperature was controlled at 25°C, and the solution was stirred at 150 rpm for about 15 minutes to prepolymerize the spinning solution to a spinnable state.

[0067] S3: High temperature air induced cross-linking and curing into filaments The spinning equipment described in Example 1 was used to fully degas the spinning solution prepolymer prepared in S2 and then poured into a 50 mL syringe, which was clamped on a constant pressure syringe pump 1. The propulsion speed of the constant pressure syringe pump 1 was set to 0.65 mL min. -1 The actual heating temperature at the center of the heating sleeve was measured to be approximately 200°C to 220°C. As the spinning solution passed through the heating sleeve at a constant speed, it crosslinked and solidified in situ. Because the high-temperature baking time for spinning was 10 to 60 seconds and no borate ester was added as a coordination dissociation agent, the platinum catalyst dissociated and solidified slowly, resulting in broken fibers and unsuccessful spinning.

[0068] Comparative Example 7: When a small amount of coordination dissociation agent is added, the cross section of the silicone fiber is irregular. This comparative example provides an organosilicon fiber. In addition to adding dipinacolato borate equivalent to 50% of the inhibitor mass in the prepolymerization stage, the amounts of other components and the preparation method refer to comparative example 6. The cross-section of the organosilicon fiber obtained by spinning is irregularly circular, and its electron microscope image is as follows: Figure 8 As shown in the figure, this is because the inhibitor dissociation agent is not enough to quickly and completely dissociate the inhibitor from the platinum ligand, resulting in a slow solidification rate. This is caused by excessive stretching of the fiber before solidification. Figure 8 Microfibers can also be observed on the fiber surface, which are attributed to the flying fibers generated by slow solidification molding.

[0069] While various embodiments of the present invention have been described above, the foregoing description is intended to be illustrative and non-exhaustive, and is not intended to be limiting of the disclosed embodiments. Numerous modifications and variations will be apparent to those skilled in the art without departing from the scope and technical principles of the described embodiments, and such modifications and variations should be considered within the scope of the present invention.

Claims

1. An organosilicon fiber, characterized in that: The raw materials of the organic silicone fiber include silicone oil spinning solution and additives. The silicone oil spinning solution includes vinyl silicone oil and hydrogen silicone oil in a mass ratio of 1: (0.8~1.4), the vinyl silicone oil includes terminal vinyl silicone oil and side vinyl silicone oil, and the addition amount of side vinyl silicone oil in the vinyl silicone oil is 0~20 wt%; the additives include catalysts, inhibitors and coordination dissociation agents, each added in an amount of 0.1 wt%~1 wt% of the content of the silicone oil spinning solution.

2. The organosilicon fiber according to claim 1, characterized in that The mass ratio of the vinyl silicone oil to the hydrogen silicone oil is 1:(1.1-1.2), and the addition amount of the lateral vinyl silicone oil in the vinyl silicone oil is 14 wt%-16 wt%.

3. The organosilicon fiber according to claim 1, characterized in that The vinyl-terminated silicone oil is a divinyl-terminated phenyl silicone oil with a viscosity of 500 cp~3000 cp and a vinyl content of 0.8%~1.2%; it includes one or a mixture of any of α, ω-vinyl polymethylphenylsiloxane, α, ω-vinyl poly (methylphenylsiloxane-dimethylsiloxane) or α, ω-vinyl poly (dimethylsiloxane-diphenylsiloxane).

4. The organosilicon fiber according to claim 1, characterized in that The side vinyl silicone oil is a terminal polyvinylphenyl silicone oil with a viscosity of 500 cp~10000 cp and a vinyl content of 2.3%~2.7%; it includes one or a mixture of α,ω-vinyl poly(methylphenylsiloxane-methylvinylsiloxane) or α,ω-vinyl poly(phenylvinylsiloxane-methylphenylsiloxane).

5. The organosilicon fiber according to claim 1, characterized in that The hydrogen-based silicone oil is a side-containing hydrogen silicone oil, including α, ω-dimethyl polymethyl hydrogen siloxane, with a viscosity of 80 cp~100 cp, and the hydrogen content in the hydrogen-based silicone oil is 0.36%~1.6%.

6. The organosilicon fiber according to claim 1, characterized in that The catalyst is a platinum catalyst, which includes any one of a Speier catalyst and a Karstedt catalyst, and the platinum concentration in the platinum catalyst is 1000 ppm to 10000 ppm; and / or, the inhibitor is any one of acetylene cyclohexanol, 2-methyl-3-butan-2-ol, or butynediol, and the inhibitor concentration is 1000 ppm to 10000 ppm; And / or, the coordination dissociation agent is a borate ester, including methyl borate, ethyl borate, butyl borate or biboronic acid pinacol ester, and the concentration of the coordination dissociation agent is 1000 ppm to 10000 ppm.

7. The organosilicon fiber according to claim 1, characterized in that The additive further includes a filler, which is hydrophobic fumed silica, and the mass ratio of the filler to the spinning solution is 1:(5-99).

8. A method for preparing the organosilicon fiber according to any one of claims 1 to 7, characterized in that: include: The vinyl silicone oil and hydrogen silicone oil are mixed evenly in proportion to prepare a silicone oil spinning solution; adding an inhibitor, a catalyst and a coordination dissociation agent to the obtained silicone oil spinning solution in sequence, stirring, and obtaining a spinning solution prepolymer; The spinning solution prepolymer is added into the spinning equipment, and is induced to crosslink and solidify by air heating, and then spun to obtain the product.

9. The method for preparing organosilicon fiber according to claim 8, characterized in that: The temperature of the silicone oil spinning solution during preparation is 0°C to 50°C; And / or, the temperature of the heat-induced cross-linking and curing is 60°C to 250°C.

10. The method for preparing organosilicon fiber according to claim 8, characterized in that: The spinning equipment includes a constant pressure injection pump, a spinning head and an insulating bracket, a heating sleeve, a temperature control device and a collecting device. The spinning solution prepolymer is pushed into the spinning head by the constant pressure injection pump, and is output to the collecting device through the spinning head for curing and forming. The heating sleeve is arranged outside the spinning head, and the temperature control device is used to adjust the temperature of the heating sleeve so that the spinning solution is stretched and pulled when passing through the spinning head, and is heated by air to induce in-situ cross-linking and curing.

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