Organosilicon artificial leather capable of releasing negative ions and applied to automotive trim

Abstract

The invention provides organic silicon artificial leather capable of releasing negative ions and applied to automotive interiors, the organic silicon artificial leather comprises a cloth base and an organic silicon layer which is arranged on one surface of the cloth base and capable of releasing negative ions, the organic silicon layer capable of releasing negative ions comprises a silicone rubber component A, a silicone rubber component B, composite negative ion powder and fumed silica, the preparation method of the composite negative ion powder comprises the following steps: firstly, coating tourmaline with hierarchical pore SiO2, secondly, grafting temperature-sensitive hydrogel on the SiO2 tourmaline powder in vitro, and finally, constructing a protective cross-linked network on the surface of the hydrogel. The organic silicon artificial leather has the beneficial effects that efficient, intelligent and stable negative ion release is realized in the organic silicon artificial leather, meanwhile, the processability and durability of the material are improved, and the organic silicon artificial leather has a remarkable practical application value.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of synthetic leather preparation, in particular to a silicone artificial leather capable of releasing negative ions applied in automotive interiors. BACKGROUND

[0002] Silicone artificial leather is widely used in furniture decoration, automotive interiors, clothing and luggage fields due to its excellent environmental protection performance, weather resistance, chemical corrosion resistance and good flexibility. With the continuous improvement of people's quality of life, the functional demand of artificial leather is increasing, and the artificial leather product with health and environmental protection function gradually becomes the new favorite of the market.

[0003] In the field of automotive interiors, the introduction of negative ion release function has significant value. As a relatively closed space, carbon dioxide exhaled by the human body during driving, harmful chemical substances emitted by interior materials, and dust and bacteria brought from the outside, etc. are easy to cause the decline of air quality in the car. Negative ions can actively adsorb and neutralize odor molecules and harmful gases in the air, settle suspended particulate matter, and efficiently purify the air in the car, creating a fresh and clean breathing environment for drivers and passengers. At the same time, negative ions can stimulate the human nervous system, regulate the function of the cerebral cortex, relieve driving fatigue, improve the mental state of drivers and passengers, and improve driving safety and riding comfort. In addition, long-term exposure to a car environment rich in negative ions can help enhance the body's immunity, reduce the incidence of respiratory diseases, and protect the health of drivers and passengers. Therefore, artificial leather materials with negative ion release function are an ideal choice for creating healthy and comfortable automotive interiors.

[0004] As a substance beneficial to human health, negative ions have the functions of purifying air, improving sleep, and enhancing immunity, etc. It has important application value to introduce negative ion function into artificial leather materials. However, most of the silicone artificial leather on the market currently only has basic physical properties and appearance decoration, lacks the function of releasing negative ions, and cannot meet the needs of consumers for healthy homes and environment.

[0005] Although there are some artificial leather products capable of releasing negative ions in the prior art, these products usually achieve this function by adding traditional negative ion powders, which have the problems of unstable negative ion release amount, poor powder dispersibility leading to the decline of the mechanical properties of artificial leather, environmental pollution during the addition process, etc., making it difficult to effectively apply in the silicone artificial leather system.

[0006] For example, Chinese Patent No. CN103485189B discloses a negative ion polyvinyl chloride synthetic leather and a manufacturing method thereof. A negative ion powder is added to the surface layer of the negative ion polyvinyl chloride synthetic leather, and the negative ion powder is a mixture of tourmaline powder and odd ice stone powder in any proportion.

[0007] A kind of negative ion additive disclosed in Chinese patent No.CN110564005B, the negative ion additive is tourmaline@13X molecular sieve of core-shell structure, the shell is 13X molecular sieve, the tourmaline is 6-20 microns powder, tourmaline@13X molecular sieve is 8-20 microns granular powder.Solve the compatibility problem of tourmaline powder and polyurethane system, can be used as the negative ion additive of polyurethane coating, polyurethane synthetic leather.

[0008] Chinese patent No.CN113403858A discloses a kind of negative ion synthetic leather, the negative ion powder of the synthetic leather is from the mixture of tourmaline and acid yttrium ore and cerium silicate and cerium aluminum stone, the degree of released negative ion is higher than prior art, and more stable.

[0009] The above-mentioned patent product adds negative ion powder, which is not suitable for organic silicon artificial leather, and the problem of releasing negative ions of organic silicon artificial leather needs to be solved urgently. SUMMARY

[0010] The application aims to provide an organic silicon artificial leather capable of releasing negative ions, which can efficiently, intelligently and stably release negative ions.

[0011] To achieve the above-mentioned application purposes, the application adopts the following technical solutions:

[0012] An organic silicon artificial leather capable of releasing negative ions, comprising a cloth base and an organic silicon layer capable of releasing negative ions arranged on one surface of the cloth base, wherein the organic silicon layer capable of releasing negative ions comprises a silicone rubber component A, a silicone rubber component B, a composite negative ion powder and fumed silica.

[0013] The preparation method of the composite negative ion powder comprises the following steps:

[0014] A. Tourmaline is coated with SiO2 by means of mesoporous template and macroporous template to obtain SiO2@ tourmaline powder.

[0015] B. 3-(trimethoxysilyl) propyl methacrylate, glacial acetic acid and the SiO2@ tourmaline powder are added into mixed solvents in sequence, and then refluxed for 4-8 hours under nitrogen protection, followed by centrifugation, washing and hot drying treatment to obtain surface-activated SiO2@ tourmaline powder.

[0016] C. The surface-activated SiO2@ tourmaline powder is added into water, and then ultrasonic dispersion is performed, followed by sequentially adding N-isopropyl acrylamide, acrylic acid and N,N'-methylene bisacrylamide, and then heated to 40-80℃, and then added with ammonium persulfate for constant temperature reaction for 4-8 hours under nitrogen atmosphere, followed by centrifugation, washing, -40℃ freeze drying to obtain a precursor.

[0017] D. The precursor is dispersed in toluene, 3-aminopropyl triethoxysilane is added dropwise, refluxed for 4-12 h, epoxy silicone oil is added at 70-90 DEG C for 10-14 h, platinum-catalyzed hydrogen-containing silicone oil is added, stirred at 60-65 DEG C for 1-2 h, and then centrifuged, washed and hot-dried to obtain the composite negative ion powder.

[0018] The modified tourmaline realizes efficient, intelligent and stable release of negative ions in the organic silicon material, can release a large amount of negative ions instantaneously, efficiently purifies air, and creates a fresh and comfortable environment.

[0019] Firstly, the tourmaline is coated by using hierarchical pore SiO2, the high specific surface area hierarchical pore formed by the mesoporous template and the macroporous template optimizes the gas / water molecule diffusion path, significantly increases the negative ion release active site, and improves the release efficiency of negative ions; the SiO2 coating layer isolates the direct contact between the tourmaline and the organic silicon matrix, provides chemical bonding sites for subsequent surface activation reaction, and lays the foundation for functionalization.

[0020] Secondly, the temperature-sensitive hydrogel is grafted outside the SiO2@ tourmaline powder, and through the double mechanism of 'temperature-sensitive extrusion + humidity activation', the static passive release of traditional tourmaline is changed into dynamic intelligent response. The temperature-sensitive layer acts as a controllable'switch' and can reduce invalid release and prolong the service life of tourmaline. For example, in high-end car interiors, high-concentration negative ions can be quickly released at high temperatures to purify the air.

[0021] When the temperature of the human body is greater than 32 DEG C, the temperature-sensitive hydrogel shrinks and extrudes the tourmaline, so that the amount of negative ion release is increased by several times; when the ambient temperature rises to 45 DEG C, the temperature-sensitive hydrogel shrinks due to temperature sensitivity, exerts mechanical pressure on the tourmaline in the composite negative ion powder, opens the double-pore structure, further promotes the efficient electrolysis of water molecules at the gas-liquid interface, promotes the dissociation of water molecules into hydrogen ions and hydroxyl ions, releases high-concentration negative ions, and rapidly purifies the air.

[0022] Finally, a protective crosslinking network is constructed on the surface of the hydrogel, and the hydrogel is 'locked' inside, which effectively prevents the destruction of the structure of the hydrogel caused by high-temperature processing of the organic silicon, ensures the stability of the processing process, and significantly improves the compatibility of the composite negative ion powder and the organic silicon matrix.

[0023] Preferably, in step A, the tourmaline is dispersed in an ethanol solution containing a mesoporous template, ultrasonic treatment is performed for 20-40 min; a water dispersion of a macroporous template is added, high-speed shearing emulsification is performed at 2000 rpm for 20-40 min to form a uniform emulsion; a mixed solution of tetraethyl orthosilicate and ammonia water is added dropwise and reacted for 5-7 h, and then aging, suction filtration, hot drying and calcination treatment are performed to obtain the SiO2@ tourmaline powder.

[0024] Preferably, in the A step, the particle size of the tourmaline is 6-20 μm, for example, it can be 6 μm, 7 μm, 8 μm, 9 μm, 10 μm, 11 μm, 12 μm, 13 μm, 14 μm, 15 μm, 16 μm, 17 μm, 18 μm, 19 μm, 20 μm. Controlling the particle size of tourmaline in this range can balance the negative ion release efficiency and the flatness of the silicone artificial leather surface. If the particle size is too large, the surface of the silicone artificial leather will be rough. If the particle size is too small, the tourmaline is easy to agglomerate. The mesoporous template is Pluronic F127, and the particle size range is 2-5 nm. The macroporous template is PMMA microspheres, and the particle size range is 200-500 nm. Strictly controlling the particle size and proportion of the template can ensure the order of the mesoporous / macroporous structure, avoid the collapse of the pore channel, realize the double-stage diffusion channel, accelerate the penetration of environmental water molecules, and shorten the negative ion release response time to 5 s. The mass ratio of tourmaline, mesoporous template, macroporous template and tetraethyl orthosilicate is 1:0.15:0.3:0.86. The mass ratio of tetraethyl orthosilicate to NH3 in ammonia water is 0.86:0.54, and the concentration of ammonia water is 25-30 wt%. The mass ratio accurately controls the SiO2 coating thickness and coating integrity.

[0025] Preferably, in the A step, the aging time is 4-8 h; the calcination temperature is 540-560 ℃, for example, it can be 540 ℃, 550 ℃, 560 ℃, and the time is 4-6 h, for example, it can be 4 h, 4.5 h, 5 h, 5.5 h, 6 h. Limiting the calcination temperature and time in this range can remove the template and leave a hierarchical pore SiO2 coating layer.

[0026] Preferably, in the B step, the mixed solvent is toluene and ethanol in a volume ratio of 3-5:1; the ratio of 3-(trimethoxysilyl)propyl methacrylate and glacial acetic acid is 3-5 g:0.5 ml; the volume ratio of the mixed solvent and the glacial acetic acid is 450-500:0.3-0.5. Toluene swells the surface of SiO2@tourmaline powder, and ethanol disperses the silane coupling agent, which can synergistically improve the penetration of KH-570 molecules. Glacial acetic acid reduces the hydrolysis side reaction and improves the grafting density of the surface silicon hydroxyl group.

[0027] Preferably, in the C step, the mass ratio of N-isopropyl acrylamide, acrylic acid, N,N'-methylene bisacrylamide and ammonium persulfate is 0.8-1.1:0.1-0.3:0.01-0.02:0.01-0.02. When the amount of acrylic acid is excessive, the hydrogel will be excessively swollen, which will cause the silicone layer that can release negative ions to blister. Excessive NIPAM will cause temperature sensitivity to be sluggish, and the amount of negative ion release will not be as expected.

[0028] Preferably, in the D step, the mass ratio of 3-aminopropyl triethoxysilane, epoxy silicone oil and hydrogen-containing silicone oil is 7-9:110-130:18-22; the Si-H group content of the hydrogen-containing silicone oil is 0.5-0.8 mmol / g, and the molar ratio of Si-H of the hydrogen-containing silicone oil to the epoxy group of the epoxy silicone oil is 1.1-1.3:1.

[0029] Preferably, the temperature of the heat drying is 40-60℃, and the time is 2-12h; the reagent for washing is toluene, ethanol or deionized water.

[0030] Preferably, the silicone layer capable of releasing negative ions further comprises one or more of color paste, anti-aging aid, flame retardant, antistatic agent, inhibitor, tackifier and hand feel adjusting agent.

[0031] Preferably, the mass ratio of the silicone rubber component A, the silicone rubber component B, the composite negative ion powder and the fumed silica is 50:50:6:2; wherein the viscosity of the silicone rubber component A is 5000-20000 cP, and the hydrogen content of the component B is 0.5-1.0 mmol / g.

[0032] Preferably, the silicone rubber component A comprises one or more of vinyl-terminated polydimethylsiloxane, phenyl vinyl silicone oil and epoxy-modified vinyl silicone oil; the silicone rubber component A further comprises a platinum catalyst; and the silicone rubber component B is one or more of hydrogen-containing silicone oil, hydrogen-containing MQ resin and long-chain alkyl-modified hydrogen-containing silicone oil.

[0033] When applied to automotive interiors, the application brings all-round comfortable experience and health protection to drivers and passengers based on the technical principle of multi-level structure modification. In a high-temperature and closed vehicle environment, the tourmaline coated with hierarchical pore SiO2 plays a key role, the high specific surface area hierarchical pore formed by the mesopore template and the macropore template optimizes the gas / water molecule diffusion path, significantly increases the negative ion release active site, so that the tourmaline can quickly release a large amount of negative ions, and these negative ions can effectively decompose harmful gases such as formaldehyde and odors, quickly purify the air, and create a fresh breathing environment for users like a forest; at the same time, the SiO2 coating layer isolates the direct contact between the tourmaline and the silicone matrix, provides chemical bonding sites for subsequent surface activation reactions, and lays the foundation for functionalization.

[0034] The "temperature-sensitive extrusion + humidity activation" double mechanism of the temperature-sensitive hydrogel further improves the performance of the product. As a controllable "switch", the temperature-sensitive layer will deform and extrude due to temperature rise after the car is exposed to high temperature, prompting the tourmaline to quickly release high-concentration negative ions to purify the air; when the car is in a low-temperature environment, the temperature-sensitive layer reduces the invalid release of negative ions, thereby prolonging the service life of the tourmaline. This dynamic intelligent response breaks the limitations of traditional tourmaline static passive release.

[0035] In addition, the protective crosslinking network constructed on the surface of the hydrogel "locks" the hydrogel inside, effectively preventing the destruction of the structure of the hydrogel by high-temperature processing of the organic silicon during high-temperature processing of the automotive interior, and ensuring the stability of the processing process; at the same time, this structure significantly improves the compatibility of the composite negative ion powder and the organic silicon artificial leather, endows the interior material with wear resistance and weather resistance, and balances aesthetics and functionality, so that every trip becomes a healthy and comfortable enjoyment. DETAILED DESCRIPTION

[0036] The present application is further described below.

[0037] Example 1

[0038] The present embodiment provides an organic silicon artificial leather capable of releasing negative ions applied in automotive interiors, comprising a cloth base and an organic silicon layer capable of releasing negative ions arranged on one surface of the cloth base, wherein the organic silicon layer capable of releasing negative ions comprises phenyl vinyl silicone oil, platinum catalyst, hydrogen-containing silicone oil, composite negative ion powder and fumed silica; the mass ratio of the phenyl vinyl silicone oil, platinum catalyst, hydrogen-containing silicone oil, composite negative ion powder and fumed silica is 49:1:50:6:2;

[0039] The preparation method of the composite negative ion powder comprises the following steps:

[0040] A. Disperse tourmaline in an ethanol solution containing mesoporous templates, and ultrasonically treat for 30 min; then add a water dispersion of macroporous templates, and high-speed shear emulsify at 2000 rpm for 30 min to form a uniform emulsion; dropwise add a mixed solution of tetraethyl orthosilicate and ammonia water, and react for 6 h, then perform aging, suction filtration, hot drying and calcination treatment to obtain SiO2@ tourmaline powder; the uncontrolled template is Pluronic F127, and the particle size is 4 nm; the macroporous template is PMMA microspheres, and the particle size is 300 nm.

[0041] B. Add 5 g of 3-(trimethoxysilyl)propyl methacrylate, 0.5 ml of glacial acetic acid and the SiO2@ tourmaline powder in the mixed solvent in sequence, and the mixed solvent is toluene and ethanol in a volume ratio of 5:1; reflux for 6 h under the protection of nitrogen, and then perform centrifugation, washing and hot drying treatment to obtain the surface-activated SiO2@ tourmaline powder.

[0042] C. Add the surface-activated SiO2@ tourmaline powder into water, ultrasonically disperse, then add N-isopropyl acrylamide, acrylic acid and N,N'-methylene bisacrylamide in sequence, heat to 60℃, add ammonium persulfate, and react for 6 h under a nitrogen atmosphere, then perform centrifugation, washing and freeze-drying at -40℃ to obtain a precursor; the mass ratio of N-isopropyl acrylamide, acrylic acid, N,N'-methylene bisacrylamide and ammonium persulfate is 1:0.2:0.02:0.02.

[0043] D, the precursor is dispersed in toluene, 3-aminopropyl triethoxysilane is added dropwise, refluxed for 8h, epoxy silicone oil is added at 80℃ for 12h, platinum-catalyzed hydrogen-containing silicone oil is added, stirred at 60℃ for 2h, and then centrifuged, washed and dried to obtain the composite anion powder.

[0044] Comparative Example 1

[0045] Different from Example 1, the silicone artificial leather of the present comparative example does not add the composite anion powder.

[0046] The rest is the same as Example 1, which will not be repeated here.

[0047] Comparative Example 2

[0048] Different from Example 1, the composite anion powder of the silicone artificial leather of the present comparative example is unmodified tourmaline powder.

[0049] The rest is the same as Example 1, which will not be repeated here.

[0050] Comparative Example 3

[0051] Different from Example 1, the composite anion powder of the silicone artificial leather of the present comparative example is prepared as follows: 100g tourmaline powder is dispersed in 1000ml 10% hydrochloric acid solution, ultrasonic treatment for 30min, remove surface metal impurities; suction filtration, washed with deionized water until neutral, dried at 110℃ for standby; 5g of vinyl trimethoxysilane (VTMO) is added to 500ml of anhydrous ethanol; add 50ml of deionized water, 1ml of glacial acetic acid (pH≈4.5), magnetic stirring for 30min; add the pretreated tourmaline powder, reflux at 70℃ water bath for 4h; centrifuge the reaction liquid (8000rpm, 10min), discard the supernatant; the solid is washed with ethanol and deionized water for 3 times respectively; vacuum dried at 60℃ for 12h to obtain the vinyl-modified tourmaline powder.

[0052] The rest is the same as Example 1, which will not be repeated here.

[0053] Comparative Example 4

[0054] Different from Example 1, the composite anion powder of the silicone artificial leather of the present comparative example is SiO2@ tourmaline powder of step A.

[0055] The rest is the same as Example 1, which will not be repeated here.

[0056] Comparative Example 5

[0057] Different from Comparative Example 3, the tourmaline powder of the present comparative example is SiO2@ tourmaline powder of step A.

[0058] The rest are the same as example 1, which will not be repeated here.

[0059] Test method

[0060] 1. Test negative ion concentration: using air negative ion detector, in a closed environment, measure the increment of negative ion concentration in the air near the sample;

[0061] 2. Test negative ion concentration (human contact): using air negative ion detector, in a semi-closed environment, using body parts to press the sample, measure the increment of negative ion concentration in the air near the sample;

[0062] 3. Tear strength test: cut the sample into pant-shaped test samples, make sure the test sample is prepared along the longitude direction, use a tensile testing machine to record the tear load-time curve, see standard GB / T 16578.1 for specific test details.

[0063] Table 1-2 is the performance test results of examples and comparative examples.

[0064] Table 1

[0065]

[0066] From the test data in Table 1, the negative ion concentration of example 1 is 4.8 times that of comparative example 2, and at the same time, comparative example 2 has obvious defects in appearance, the surface is rough and uneven, and the tear resistance is much lower than the industry standard. This result fully shows that the structural modification treatment of tourmaline in the application successfully realizes the good compatibility of composite negative ion powder and silicone system. The silicone artificial leather capable of releasing negative ions prepared by this method not only has stable and efficient negative ion release performance, but also performs excellently in physical properties, showing great application potential and broad market prospect, and has significant practical application value that cannot be ignored.

[0067] Comparing the data of comparative example 3 and example 1, it can be seen that surface modification improves the dispersibility and stability of tourmaline, so the appearance and tear strength data of comparative example 2 are improved, but the ability to release negative ions is still limited, so the negative ion concentration is lower than that of the silicone artificial leather capable of releasing negative ions of example 1.

[0068] Comparing the data of comparative example 4 and example 1, it can be seen that the SiO2 with hierarchical pores on the surface of the tourmaline of example 4 improves the dispersibility and negative ion release capacity of the tourmaline, but the compatibility with the silicone layer is general.

[0069] Comparative Example 4 is slightly worse than Example 1 in terms of anion release ability, and Comparative Example 5 is insufficient in terms of anion release site exposure, only relying on SiO2 micropores to adsorb ambient water molecules, while Example 1 achieves a combination of active and passive release mechanisms through carboxyl ionization, so the anion concentration of Comparative Example 5 is only 71% of that of Example 1.

[0070] Table 2

[0071]

[0072] As can be seen from the test data in Table 2, the application successfully breaks through the limitations of traditional tourmaline static passive release of anions and achieves a leap to a dynamic intelligent response mode by using a temperature-sensitive extrusion mechanism. When the human body temperature and extrusion act together, the temperature-sensitive layer is immediately activated, significantly accelerating the anion release process. Taking the automotive seat leather application scenario as an example, the anion organic silicone artificial leather of the application can release a large amount of anions instantly through the dynamic response of the hydrogel triggered by body temperature, efficiently purifying the air in the car and creating a fresh and comfortable environment for the driver and passengers.

[0073] After wet heat aging treatment, the anion concentration decay rate of the application is only 15%, which fully proves that the modification of tourmaline by constructing a multi-level structure (SiO2 skeleton / hydrogel / organic silicone crosslinking layer) with a temperature-sensitive hydrogel as the key coating layer effectively isolates the erosion of the wet heat environment on the tourmaline crystal, effectively prolonging the service life of the composite anion powder, and further demonstrating that the anion-releasing organic silicone artificial leather of the application has excellent properties such as high stability and long-acting.

[0074] As can be seen from the data of dynamic anion release of Comparative Example 5 and Example 1, Comparative Example 5 lacks a temperature-sensitive hydrogel system, and its anion release completely relies on passive diffusion, so its ability to release anions dynamically is severely insufficient. As can be seen from the data after wet heat aging, after wet heat aging treatment, the tourmaline of Comparative Example 5 fails more, and the anion release ability decreases, with a decay rate as high as 50%, proving that the multi-level structure modification is the core of long-acting and stable anion release.

[0075] The above are examples of the application and do not limit the protection scope of the application. If those skilled in the art can easily think of it after reading the application, it is also the protection scheme required by the application. Any equivalent changes made in terms of structure, shape, and principle should be covered within the protection scope of the application.

Claims

1. An organosilicon artificial leather that releases negative ions for use in automotive interiors, characterized in that... It includes a cloth base and an organosilicon layer capable of releasing negative ions disposed on one surface of the cloth base, wherein the organosilicon layer capable of releasing negative ions includes silicone rubber component A, silicone rubber component B, composite negative ion powder and fumed silica. The preparation method of the composite negative ion powder includes the following steps: A. Tourmaline is coated with SiO2 using mesoporous and macroporous templates to obtain SiO2@tourmaline powder; B. 3-(trimethoxysilyl)propyl methacrylate, glacial acetic acid and the SiO2@tourmaline powder are added sequentially to the mixed solvent. The mixture is refluxed for 4-8 hours under nitrogen protection, and then centrifuged, washed and heat-dried to obtain surface-activated SiO2@tourmaline powder. C. Add the surface-activated SiO2@tourmaline powder to water, disperse it by ultrasonication, and then add N-isopropylacrylamide, acrylic acid and N,N'-methylenebisacrylamide in sequence. Heat the mixture to 40-80℃, add ammonium persulfate, and react at a constant temperature for 4-8 hours under a nitrogen atmosphere. Centrifuge, wash and freeze dry at -40℃ to obtain the precursor. D. Disperse the precursor in toluene, add 3-aminopropyltriethoxysilane dropwise, reflux for 4-12 hours, add epoxy silicone oil and react at 70-90℃ for 10-14 hours, then add platinum-catalyzed hydrogen-containing silicone oil, stir and solidify at 60-65℃ for 1-2 hours, and obtain composite negative ion powder after centrifugation, washing and heat drying.

2. The organosilicon artificial leather that releases negative ions when used in automotive interiors according to claim 1, characterized in that, In step A, tourmaline is dispersed in an ethanol solution containing a mesoporous template and ultrasonically treated for 20-40 min; then an aqueous dispersion of a macroporous template is added, and high-speed shearing emulsification at 2000 rpm is performed for 20-40 min to form a homogeneous emulsion; a mixed solution of tetraethyl orthosilicate and ammonia is added dropwise and reacted for 5-7 h, followed by aging, filtration, hot drying and calcination to obtain SiO2@tourmaline powder; And / or, the tourmaline has a particle size of 6-20 μm; the mesoporous template is Pluronic F127 with a particle size range of 2-5 nm; the macroporous template is PMMA microspheres with a particle size range of 200-500 nm; the mass ratio of tourmaline, mesoporous template, macroporous template and tetraethyl orthosilicate is 1:0.15:0.3:0.86; the mass ratio of tetraethyl orthosilicate to NH3 in ammonia water is 0.86:0.54; and the concentration of ammonia water is 25-30 wt%.

3. The organosilicon artificial leather that releases negative ions when used in automotive interiors according to claim 1, characterized in that... In step A, the aging time is 4-8 hours; the calcination temperature is 540-560℃, and the time is 4-6 hours.

4. The organosilicon artificial leather that releases negative ions when used in automotive interiors according to claim 1, characterized in that, In step B, the mixed solvent is toluene and ethanol in a volume ratio of 3-5:1; the ratio of 3-(trimethoxysilyl)propyl methacrylate to glacial acetic acid is 3-5 g: 0.5 ml; and the volume ratio of the mixed solvent to the glacial acetic acid is 450-500: 0.3-0.

5.

5. The organosilicon artificial leather that releases negative ions when used in automotive interiors according to claim 1, characterized in that... In step C, the mass ratio of N-isopropylacrylamide, acrylic acid, N,N'-methylenebisacrylamide and ammonium persulfate is 0.8-1.1:0.1-0.3:0.01-0.02:0.01-0.

02.

6. The organosilicon artificial leather that releases negative ions when used in automotive interiors according to claim 1, characterized in that, In step D, the mass ratio of 3-aminopropyltriethoxysilane, epoxy silicone oil, and hydrogen-containing silicone oil is 7-9:110-130:18-22; the Si-H group content of the hydrogen-containing silicone oil is 0.5-0.8 mmol / g, and the molar ratio of Si-H in the hydrogen-containing silicone oil to the epoxy group in the epoxy silicone oil is 1.1-1.3:

1.

7. The organosilicon artificial leather that releases negative ions when used in automotive interiors according to claim 1, characterized in that, The heat drying temperature is 40-60℃, and the time is 2-12h; the washing reagent is toluene, ethanol, or deionized water.

8. The organosilicon artificial leather that releases negative ions when used in automotive interiors according to claim 1, characterized in that, The organosilicon layer that can release negative ions also includes one or more of the following: color paste, anti-aging additive, flame retardant, antistatic agent, inhibitor, tackifier, and feel modifier.

9. The organosilicon artificial leather that releases negative ions when used in automotive interiors according to claim 1, characterized in that, The mass ratio of silicone rubber component A, silicone rubber component B, composite negative ion powder and fumed silica is 50:50:6:2; wherein the viscosity of silicone rubber component A is 5000-20000 cP, and the hydrogen content of component B is 0.5-1.0 mmol / g.

10. The organosilicon artificial leather that releases negative ions when applied in automotive interiors according to claim 1, characterized in that, The silicone rubber component A includes one or more of vinyl-terminated polydimethylsiloxane, phenyl vinyl silicone oil, and epoxy-modified vinyl silicone oil; the silicone rubber component A also includes a platinum catalyst; the silicone rubber component B is one or more of hydrogen-containing silicone oil, hydrogen-containing MQ resin, and long-chain alkyl-modified hydrogen-containing silicone oil.

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