Organic silicon flexible material and preparation method thereof

Abstract

The invention belongs to the field of flexible materials, and particularly relates to an organic silicon flexible material and a preparation method thereof.The organic silicon flexible material is prepared from, by weight, 60-80 parts of acrylic acid modified siloxane, 10-30 parts of plant fiber, 2-6 parts of silane coupling agent, 2-5 parts of photoinitiator and 0.5-4 parts of PEG 400, and after siloxane is modified through acrylic acid, the organic silicon flexible material is added into the organic silicon flexible material; the crosslinking density and the mechanical property are remarkably improved, and an acrylic acid group and a functional group of a silane modified layer on the surface of the plant fiber are connected through a photocuring reaction, so that efficient interface bonding is realized, and the overall strength and toughness of the organic silicon material are further improved; besides, optical transparency of the material can be achieved through the photocuring effect, environmental pollution caused by a traditional curing agent is avoided, and powerful functional material support is expected to be provided for complex intelligent application of electronic skin, biosensors, soft robots and the like.

Description

Technical Field

[0001] The invention belongs to the field of flexible materials, and in particular relates to an organic silicon flexible material and a preparation method thereof. Background Art

[0002] Due to its unique chemical structure and silicon-oxygen bond advantages, silicone materials have excellent flexibility, chemical stability and biocompatibility. They show great potential in the fields of flexible electronics, wearable devices, biomedical implants and aerospace. However, traditional silicone materials have low mechanical strength and toughness, are prone to fracture under tension and bending conditions, and are difficult to meet the high strength requirements in dynamic applications. Although the mechanical properties can be improved by introducing reinforcing fillers, it often leads to reduced flexibility and light transmittance. At the same time, the uniform dispersion of the fillers is poor, and stress concentration points are easily formed. At the same time, the curing of existing siloxane materials is more dependent on chemical curing agents. These chemicals not only have the risk of toxicity or environmental pollution, but may also produce residues in the material, affecting its biocompatibility. With the development of society, how to give flexible materials multifunctionality through structural and component design while ensuring the flexibility and uniformity of flexible materials has become a hot topic and difficulty in research.

[0003] Therefore, it is particularly important to develop a multifunctional, high-performance silicone flexible material to solve the problems of low mechanical properties, single function and insufficient environmental stability of existing materials. Summary of the invention

[0004] In view of the above situation, the present invention provides a flexible silicone material and a preparation method thereof, which introduces acrylic acid groups into the PDMS (polydimethylsiloxane) molecular chain, initiates a cross-linking reaction of the acrylic acid groups under the catalysis of a photoinitiator, thereby achieving curing, avoiding the use of traditional chemical curing agents, and modifying plant fibers through silane coupling agents to enhance the interface bonding between the fibers and the silicone matrix, thereby giving the material flexibility, strength and sensitivity. At the same time, micronization technology and dispersants are used to optimize the distribution of plant fibers in the matrix to ensure the uniformity of the performance of the composite material, ultimately solving the problems of insufficient mechanical properties, environmental pollution and single function of traditional silicone materials, and providing a new solution for their application in the field of multifunctional electronic devices.

[0005] To achieve the above purpose, the technical solution adopted by the present invention is as follows: The invention provides an organic silicon flexible material, which comprises the following raw materials in parts by weight: 60-80 parts of acrylic modified siloxane, 10-30 parts of plant fiber, 2-6 parts of silane coupling agent, 2-5 parts of photoinitiator and 0.5-4 parts of PEG400 (polyethylene glycol 400).

[0006] Furthermore, the acrylic modified siloxane comprises the following raw materials in parts by weight: 50-70 parts of PDMS, 20-40 parts of acrylate, 1 part of Karstedt catalyst and 5 parts of toluene.

[0007] Furthermore, the plant fiber is selected from one or more of CNC (cellulose nanocrystal), flax fiber, cotton fiber, coconut shell fiber and bamboo fiber.

[0008] Furthermore, the silane coupling agent is selected from one or more of A151 (vinyl triethoxysilane), A171 (vinyl trimethoxysilane), isobutyl triethoxysilane and KH-550 (γ-aminopropyl triethoxysilane), preferably A151.

[0009] Further, the photoinitiator is selected from one or more of Irgacure 2959 (2-hydroxy-4'-(2-hydroxyethoxy)-2-methylpropiophenone), Darocur 1173 (2-hydroxy-2-methylpropiophenone) and TPO-L (ethyl 2,4,6-trimethylbenzoylphosphonate).

[0010] Furthermore, the PDMS is hydroxyl terminated.

[0011] Further, the acrylate is selected from one or more of MMA (methyl methacrylate), PHEA (2-phenoxyethyl acrylate), PEGDA (polyethylene glycol diacrylate), HDDA (1,6-hexanediol diacrylate) and GPTA (propoxylated glycerol triacrylate).

[0012] The preparation method of the acrylic acid-modified siloxane is as follows: S1: Weigh 50-70 parts of PDMS and 5 parts of toluene and add them to n-hexane, with the mass ratio of PDMS to n-hexane being 1:6. Stir in a magnetic stirrer at 100 rpm for 20 min to dissolve and obtain a PDMS solution. S2: Weigh 20-40 parts of acrylate, dissolve them in ethyl acetate at a mass ratio of 1:3 to obtain an acrylate solution, add the acrylate solution to the PDMS solution obtained in step S1, and stir at 100 rpm for 5 min to obtain a mixed solution; S3: Weigh 1 portion of Karstedt catalyst, add it to the mixed solution obtained in step S2 under nitrogen protection, and react at 150 rpm and 40-50° C. for 4 h to obtain a reaction solution; S4: using a rotary evaporator to remove the organic solvent in the reaction solution obtained in step S3, the water bath temperature is set to 30° C., the cold trap temperature is set to −20° C., and acrylic modified siloxane is obtained.

[0013] The present invention also provides a method for preparing a flexible silicone material, which specifically comprises the following steps: Step 1: Weigh 10-30 portions of plant fibers, soak them in a 5% (w / v) NaOH solution at a mass volume ratio of 1 g:5 mL, treat at 80°C for 2 h, filter to obtain the soaked plant fibers, rinse with purified water until the pH is neutral, and dry at 60°C for 4 h to obtain the pretreated plant fibers; Step 2: Weigh 2-6 parts of a silane coupling agent, dissolve them in a 90% (v / v) ethanol aqueous solution at a mass volume ratio of 1 g:20 mL, and adjust the pH to 4.0-5.0 with a 0.1 mol / L HCl solution to obtain a silane coupling agent solution; Step 3: adding the pretreated plant fiber obtained in step 1 to the silane coupling agent solution obtained in step 2, ultrasonically treating at 200 W for 30 min, stirring the reaction at 40° C. and 150 rpm under magnetic stirring for 3 h, and vacuum drying at 60° C. for 12 h to obtain modified plant fiber; Step 4: Weigh 60-80 parts of acrylic modified siloxane, heat to 50°C, weigh 2-5 parts of photoinitiator and 0.5-4 parts of PEG 400, add them in dark place, stir evenly, add the modified plant fiber obtained in step 3, obtain a mixture, place the mixture in a high shear homogenizer for dispersion treatment for 10 min, the speed is 10000 rpm, the power is 3.5 kW, and obtain a homogenized liquid; Step 5: The homogenized liquid obtained in step 4 is placed in a vacuum drying oven for 30 minutes to remove bubbles, then poured into a mold, irradiated with ultraviolet light, and cured for 3 minutes to obtain a silicone flexible material.

[0014] The beneficial effects achieved by the present invention are as follows: The organosilicon flexible material prepared by the present invention uses acrylic modified siloxane as a flexible matrix, and overcomes the deficiencies of existing flexible materials in terms of mechanical strength, environmental protection and functional diversity by introducing plant fibers and photocuring technology. The plant fibers and the organosilicon matrix are efficiently bonded at the interface through a silane coupling agent. The introduction of acrylic groups not only enhances the crosslinking density of siloxane, but also significantly improves its mechanical properties and surface energy, so that the matrix has better interface bonding ability and toughness. A photoinitiator is used to allow the acrylic groups on the modified siloxane to crosslink quickly, thereby avoiding environmental pollution and residual problems caused by traditional curing agents and the influence of the filler on the overall performance of the silicon material. In addition, the photocuring technology can also achieve optical transparency of the material, ensuring its photosensitivity in electronic skin and flexible sensors. At the same time, the acrylic groups undergo a crosslinking reaction with the functional groups of the silane modified layer on the surface of the plant fibers through a photocuring reaction, thereby further improving the overall strength and adhesion performance of the material. The plant fibers modified by micronization and silane coupling agents significantly improve the tensile strength and fatigue resistance of the flexible material, thereby avoiding material rupture caused by stress concentration. The added PEG 400 not only acts as a surfactant to ensure the stability of the system, but also has the function of a dispersant, allowing the plant fibers to be evenly distributed to form a multi-point enhanced network structure.

[0015] The organic silicon flexible material prepared by the present invention realizes a high degree of integration of mechanical, optical and electrical properties through structural design, providing powerful functional material support for complex intelligent application scenarios such as electronic skin, biosensors and soft robots. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a flow chart for preparing a flexible silicone material of the present invention; Figure 2 FTIR (Fourier Transform Infrared Spectroscopy) results of the acrylic modified siloxane prepared in Example 1; Figure 3 The mechanical properties test results of the organosilicon flexible materials prepared in Examples 1-5; Figure 4 These are the results of thermogravimetric analysis of the flexible silicone materials prepared in Examples 1-5.

[0017] The accompanying drawings are used to provide further understanding of the present invention and constitute a part of the specification. They are used to explain the present invention together with the embodiments of the present invention and do not constitute a limitation of the present invention. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present invention will be clearly and completely described 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; based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0019] Unless otherwise defined, all professional and scientific terms used herein have the same meanings as those familiar to those skilled in the art. In addition, any methods and materials similar or equivalent to those described herein may be applied to the present invention. The preferred implementation methods and materials described herein are for demonstration purposes only and are not intended to limit the content of this application.

[0020] In the following embodiments, the preparation process of the organic silicon flexible material is as follows Figure 1 Unless otherwise specified, all methods are conventional; the materials used in the following embodiments, unless otherwise specified, are new materials purchased from the market.

[0021] Example 1: This example provides a flexible silicone material, which includes the following raw materials in parts by weight: 70 parts of acrylic modified siloxane, 20 parts of CNC, 2 parts of A151, 5 parts of Irgacure 2959 and 3 parts of PEG 400.

[0022] The acrylic modified siloxane comprises the following raw materials in parts by weight: 50 parts of PDMS, 40 parts of MMA, 1 part of Karstedt catalyst and 5 parts of toluene. The specific preparation method is as follows: S1: Weigh 50 parts of PDMS and 5 parts of toluene and add them to n-hexane, the mass ratio of PDMS to n-hexane is 1:6, stir at 100 rpm in a magnetic stirrer for 20 min to obtain a PDMS solution; S2: Weigh 40 parts of MMA and dissolve them in ethyl acetate at a mass ratio of 1:3 to obtain an MMA solution. Add the MMA solution to the PDMS solution obtained in step S1, and stir at 100 rpm for 5 min to obtain a mixed solution. S3: Weigh 1 portion of Karstedt catalyst, add it to the mixed solution obtained in step S2 under nitrogen protection, and react at 150 rpm and 40° C. for 4 h to obtain a reaction solution; S4: using a rotary evaporator to remove the organic solvent in the reaction solution obtained in step S3, the water bath temperature is set to 30° C., the cold trap temperature is set to −20° C., and acrylic modified siloxane is obtained.

[0023] This embodiment also provides a method for preparing a flexible silicone material, which specifically includes the following steps: Step 1: Weigh 20 portions of CNC, soak them in 5% NaOH solution at a mass volume ratio of 1 g:5 mL, treat at 80°C for 2 h, filter to obtain the soaked CNC, rinse with purified water until the pH is neutral, and dry at 60°C for 4 h to obtain the pretreated CNC; Step 2: Weigh 2 portions of A151, dissolve them in 90% ethanol aqueous solution at a mass volume ratio of 1 g:20 mL, and adjust the pH to 4.5 with 0.1 mol / L HCl solution to obtain an A151 solution; Step 3: Add the pretreated CNC obtained in step 1 to the A151 solution obtained in step 2, perform ultrasonic treatment at 200 W for 30 min, stir the mixture under magnetic stirring at 40 ° C and 150 rpm for 3 h, and vacuum dry at 60 ° C for 12 h to obtain modified CNC; Step 4: Weigh 70 parts of acrylic modified siloxane, heat to 50°C, protect from light, weigh 5 parts of Irgacure 2959 and 3 parts of PEG 400, add them, stir evenly, then add the modified CNC obtained in step 3 to obtain a mixture, place the mixture in a high shear homogenizer for dispersion treatment for 10 min, the speed is 10000 rpm, the power is 3.5 kW, and a homogenized liquid is obtained; Step 5: The homogenous liquid obtained in step 4 is placed in a vacuum drying oven for 30 minutes to remove bubbles, then poured into a mold, irradiated with ultraviolet light of 365 nm wavelength, and cured for 3 minutes to obtain a silicone flexible material.

[0024] Example 2: This example provides a flexible organosilicon material, which includes the following raw materials in parts by weight: 80 parts of acrylic modified siloxane, 10 parts of CNC, 4 parts of A151, 4 parts of Irgacure 2959 and 4 parts of PEG 400.

[0025] The acrylic modified siloxane comprises the following raw materials in parts by weight: 70 parts of PDMS, 20 parts of MMA, 1 part of Karstedt catalyst and 5 parts of toluene. The specific preparation steps refer to the preparation method of acrylic modified siloxane in Example 1.

[0026] This embodiment also provides a method for preparing a flexible silicone material. The specific preparation steps refer to the method for preparing a flexible silicone material in Embodiment 1.

[0027] Example 3: This example provides a flexible organosilicon material, which includes the following raw materials in parts by weight: 60 parts of acrylic modified siloxane, 30 parts of CNC, 6 parts of A151, 2 parts of Irgacure 2959 and 0.5 parts of PEG 400.

[0028] The acrylic modified siloxane comprises the following raw materials in parts by weight: 60 parts of PDMS, 30 parts of MMA, 1 part of Karstedt catalyst and 5 parts of toluene. The specific preparation steps refer to the preparation method of acrylic modified siloxane in Example 1.

[0029] This embodiment also provides a method for preparing a flexible silicone material. The specific preparation steps refer to the method for preparing a flexible silicone material in Embodiment 1.

[0030] Example 4: This example provides a flexible organosilicon material, which includes the following raw materials in parts by weight: 70 parts of acrylic modified siloxane, 20 parts of cotton fiber, 2 parts of A151, 5 parts of Darocur 1173 and 3 parts of PEG 400.

[0031] The acrylic modified siloxane comprises the following raw materials in parts by weight: 50 parts of PDMS, 40 parts of PEGDA, 1 part of Karstedt catalyst and 5 parts of toluene. The specific preparation method is as follows: S1: Weigh 50 parts of PDMS and 5 parts of toluene and add them to n-hexane, the mass ratio of PDMS to n-hexane is 1:6, stir at 100 rpm in a magnetic stirrer for 20 min to obtain a PDMS solution; S2: Weigh 40 parts of PEGDA and dissolve them in ethyl acetate at a mass ratio of 1:3 to obtain a PEGDA solution. Add the PEGDA solution to the PDMS solution obtained in step S1, and stir at 100 rpm for 5 min to obtain a mixed solution. S3: Weigh 1 portion of Karstedt catalyst, add it to the mixed solution obtained in step S2 under nitrogen protection, and react at 150 rpm and 50° C. for 4 h to obtain a reaction solution; S4: using a rotary evaporator to remove the organic solvent in the reaction solution obtained in step S3, the water bath temperature is set to 30° C., the cold trap temperature is set to −20° C., and acrylic modified siloxane is obtained.

[0032] This embodiment also provides a method for preparing a flexible silicone material, which specifically includes the following steps: Step 1: Weigh 20 portions of cotton fibers, soak them in 5% NaOH solution at a mass volume ratio of 1 g:5 mL, treat at 80°C for 2 h, filter to obtain the soaked cotton fibers, rinse with purified water until the pH is neutral, and dry at 60°C for 4 h to obtain the pretreated cotton fibers; Step 2: Weigh 2 portions of A151, dissolve them in 90% ethanol aqueous solution at a mass volume ratio of 1 g:20 mL, and adjust the pH to 4.2 with 0.1 mol / L HCl solution to obtain an A151 solution; Step 3: Add the pretreated cotton fiber obtained in step 1 to the A151 solution obtained in step 2, perform ultrasonic treatment at 200 W for 30 min, stir the mixture under magnetic stirring at 40° C. and 150 rpm for 3 h, and vacuum dry at 60° C. for 12 h to obtain modified cotton fiber; Step 4: Weigh 70 parts of acrylic modified siloxane, heat to 50°C, protect from light, weigh 5 parts of Darocur 1173 and 3 parts of PEG 400, add them, stir evenly, then add the modified cotton fiber obtained in step 3 to obtain a mixture, place the mixture in a high shear homogenizer for dispersion treatment for 10 min, the speed is 10000 rpm, the power is 3.5 kW, and a homogenized liquid is obtained; Step 5: The homogenous liquid obtained in step 4 is placed in a vacuum drying oven for 30 minutes to remove bubbles, then poured into a mold, irradiated with ultraviolet light of 322 nm wavelength, and cured for 3 minutes to obtain a silicone flexible material.

[0033] Example 5: This example provides a flexible organosilicon material, which includes the following raw materials in parts by weight: 70 parts of acrylic modified siloxane, 20 parts of coconut shell fiber, 2 parts of A151, 5 parts of TPO-L and 3 parts of PEG 400.

[0034] The acrylic modified siloxane comprises the following raw materials in parts by weight: 50 parts of PDMS, 40 parts of GPTA, 1 part of Karstedt catalyst and 5 parts of toluene. The specific preparation method is as follows: S1: Weigh 50 parts of PDMS and 5 parts of toluene and add them to n-hexane, the mass ratio of PDMS to n-hexane is 1:6, stir at 100 rpm in a magnetic stirrer for 20 min to obtain a PDMS solution; S2: Weigh 40 parts of GPTA and dissolve them in ethyl acetate at a mass ratio of 1:3 to obtain a GPTA solution. Add the GPTA solution to the PDMS solution obtained in step S1, and stir at 100 rpm for 5 min to obtain a mixed solution. S3: Weigh 1 portion of Karstedt catalyst, add it to the mixed solution obtained in step S2 under nitrogen protection, and react at 150 rpm and 45° C. for 4 h to obtain a reaction solution; S4: using a rotary evaporator to remove the organic solvent in the reaction solution obtained in step S3, the water bath temperature is set to 30° C., the cold trap temperature is set to −20° C., and acrylic modified siloxane is obtained.

[0035] This embodiment also provides a method for preparing a flexible silicone material, which specifically includes the following steps: Step 1: Weigh 20 parts of coconut shell fiber, soak them in 5% NaOH solution at a mass volume ratio of 1 g: 5 mL, treat at 80 ° C for 2 h, filter to obtain the soaked coconut shell fiber, rinse with purified water until the pH is neutral, and dry at 60 ° C for 4 h to obtain the pretreated coconut shell fiber; Step 2: Weigh 2 portions of A151, dissolve them in 90% ethanol aqueous solution at a mass volume ratio of 1 g:20 mL, and adjust the pH to 5.0 with 0.1 mol / L HCl solution to obtain an A151 solution; Step 3: Add the pretreated coconut shell fiber obtained in step 1 to the A151 solution obtained in step 2, perform ultrasonic treatment at 200 W for 30 min, stir the reaction under magnetic stirring at 40° C. and 150 rpm for 3 h, and vacuum dry at 60° C. for 12 h to obtain modified coconut shell fiber; Step 4: Weigh 70 parts of acrylic modified siloxane, heat to 50°C, protect from light, weigh 5 parts of TPO-L and 3 parts of PEG400, add them, stir evenly, then add the modified coconut shell fiber obtained in step 3 to obtain a mixture, place the mixture in a high shear homogenizer for dispersion treatment for 10 min, the speed is 10000 rpm, the power is 3.5 kW, and a homogenized liquid is obtained; Step 5: The homogenous liquid obtained in step 4 is placed in a vacuum drying oven for 30 minutes to remove bubbles, then poured into a mold, irradiated with ultraviolet light of 273 nm wavelength, and cured for 3 minutes to obtain a silicone flexible material.

[0036] FTIR investigation The acrylic modified siloxane prepared in Example 1 was placed in an oven and dried to constant weight. The acrylic acid binding was investigated by FTIR using the KBr tablet method. The mixture of MMS and PDMS with the same amount of acrylic modified siloxane was used as a control. The results are shown in Figure 2 .

[0037] Mechanical properties test The organic silicon flexible materials prepared in Examples 1-5 were tested according to the test method for tensile properties of fiber reinforced plastics GB / T1447-2005. The results are shown in Figure 3 .

[0038] Thermal stability study The organic silicon flexible materials prepared in Examples 1-5 were tested according to the heat flow meter method standard GB / T 10295-2008 for the determination of steady-state thermal resistance and related properties of thermal insulation materials. The results of thermogravimetric analysis are shown in Figure 4 .

[0039] Figure 2 The FTIR results showed that the peaks at 1033 and 1131 cm in the mixture of MMA and PDMS -1The absorption peaks of the organosilicon Si-O-Si bond at two locations exist, while the characteristic peaks of the acrylic modified siloxane, as well as the typical characteristic peaks of organic functional groups such as Si-C and CH, disappear. -1 The absorption peak of amorphous SiO2 appears at , indicating that the PDMS modification is successful.

[0040] Figure 3 The mechanical property results of the silicone flexible materials prepared in Examples 1-5 show that the elongation at break of the silicone flexible materials prepared in Examples 1-4 are all greater than 150%, and the tensile stress is relatively strong. This is because the added flexible long-chain plant fibers are cross-linked with the modified siloxane, which greatly improves the overall mechanical properties of the material.

[0041] Figure 4 The results of thermogravimetric analysis show that the organosilicon flexible materials prepared in Examples 1-5 all show a slow downward trend. When the temperature continues to rise, the weight drops sharply until it stabilizes. The organosilicon flexible material prepared in Example 1 has less loss due to high temperature volatilization, and the final weight is still at a high level, indicating good thermal stability.

[0042] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

[0043] The present invention and its implementation methods are described above, which is not restrictive. The drawings are only one of the implementation methods of the present invention, and the actual application is not limited thereto. In short, if ordinary technicians in the field are inspired by it and design methods and embodiments similar to the technical solution without creativity without departing from the purpose of the invention, they should all fall within the protection scope of the present invention.

Claims

1. A flexible silicone material, characterized in that: The organic silicon flexible material comprises the following raw materials in parts by weight: 60-80 parts of acrylic modified siloxane, 10-30 parts of plant fiber, 2-6 parts of silane coupling agent, 2-5 parts of photoinitiator and 0.5-4 parts of PEG 4000; The acrylic modified siloxane comprises the following raw materials: PDMS, acrylate, Karstedt catalyst and toluene, and the specific preparation method is as follows: S1: Weigh PDMS and toluene, add them into n-hexane, stir and dissolve to obtain a PDMS solution; S2: Weigh acrylate and dissolve it in ethyl acetate to obtain an acrylate solution, add the acrylate solution to the PDMS solution obtained in step S1, stir, and obtain a mixed solution; S3: weighing a Karstedt catalyst and adding it to the mixed solution obtained in step S2, stirring and heating to obtain a reaction solution; S4: removing the organic solvent in the reaction solution obtained in step S3 to obtain acrylic modified siloxane.

2. The organic silicon flexible material according to claim 1, characterized in that: In steps S1-S4, the PDMS, acrylate, Karstedt catalyst and toluene are 50-70 parts, 20-40 parts, 1 part and 5 parts by weight respectively; In step S1, the mass ratio of PDMS to n-hexane is 1:6; In step S2, the mass ratio of the acrylic acid ester to the ethyl acetate is 1:3; In step S3, the stirring and heating process is carried out under nitrogen protection.

3. The organic silicon flexible material according to claim 1, characterized in that: The plant fiber is selected from one or more of CNC, flax fiber, cotton fiber, coconut shell fiber and bamboo fiber.

4. The organic silicon flexible material according to claim 1, characterized in that: The silane coupling agent is selected from one or more of A151, A171, isobutyltriethoxysilane and KH-550.

5. The organic silicon flexible material according to claim 1, characterized in that: The photoinitiator is selected from one or more of Irgacure 2959, Darocur 1173 and TPO-L.

6. The organic silicon flexible material according to claim 1, characterized in that: The acrylate is selected from one or more of MMA, PHEA, PEGDA, HDDA and GPTA.

7. A method for preparing a flexible silicone material according to any one of claims 1 to 6, characterized in that: The specific preparation method is as follows: Step 1: Weigh the plant fiber, soak it in a 5% NaOH solution, heat and filter to obtain the soaked plant fiber, and rinse and dry to obtain the pretreated plant fiber; Step 2: Weigh a silane coupling agent and dissolve it in a 90% ethanol aqueous solution, and adjust the pH to obtain a silane coupling agent solution; Step 3: adding the pretreated plant fiber obtained in step 1 to the silane coupling agent solution obtained in step 2, and obtaining modified plant fiber after ultrasonication, heating, stirring and drying; Step 4: Weigh acrylic modified siloxane and heat it, weigh a photoinitiator and PEG 400, add them thereto and stir, then add the modified plant fiber obtained in step 3 to obtain a mixture, and homogenize and disperse it to obtain a homogenous liquid; Step 5: Remove bubbles from the homogenized liquid obtained in step 4, and cure it with ultraviolet light to obtain a flexible silicone material.

8. The method for preparing a flexible silicone material according to claim 7, characterized in that: In step 1, the mass volume ratio of the plant fiber and the 5% NaOH solution is 1 g:5 mL; In step 2, the mass volume ratio of the silane coupling agent to the 90% ethanol aqueous solution is 1 g: 20 mL; In step 4, the operation is performed in a dark environment, and a high shear homogenizer is used in the homogenization and dispersion process.

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