Super far infrared heating silicon-based material and preparation method thereof

Abstract

The invention relates to an ultra-far infrared heating silicon-based material and a preparation method thereof, and belongs to the technical field of heating materials. The ultra-far infrared heating silicon-based material is prepared from the following components: polyacrylamide, organic modified heating particles, modified silicon dioxide aerogel, a protective agent, a thickening agent, an ultraviolet absorbent, an antioxidant, a functional additive and deionized water, the preparation method of the modified silicon dioxide aerogel comprises the following steps: mixing silicon dioxide aerogel powder and a catalyst, adding n-tridecanol, heating, mixing, centrifuging, taking a solid, washing, and carrying out vacuum drying in a drying oven to obtain the modified silicon dioxide aerogel. The invention relates to a combination of silicon dioxide aerogel and a heating material which are modified, so that the finally prepared fabric not only has excellent heating and warm-keeping properties, but also can emit far infrared rays more efficiently in the use process, thereby providing more comfortable and warm experience for a user.

Description

Technical Field

[0001] The present invention belongs to the technical field of heating materials, and relates to a far-infrared heating silicon-based material and a preparation method thereof. Background Art

[0002] Functional heating coatings generate heat energy through chemical or physical actions, or utilize the absorption and reflection of external energy (such as human body heat, light heat in the environment) to increase temperature. Its main types include far-infrared radiation coatings, which contain metal oxides, ceramic powders, graphene or carbon nanotubes, can absorb human body heat and emit far-infrared rays, and contribute to blood circulation and heat preservation.

[0003] Applying the heating coating on the surface of a medicated patch can promote the faster penetration of drugs and relieve muscle and joint pain. The far-infrared coating can also improve local blood circulation and increase the drug absorption rate; applying the heating coating on fiber materials can make warm clothes, gloves, socks, etc.; coating the inner side of underwear with a moisture-absorbing and heating or far-infrared coating can enhance the heat preservation effect. The moisture-absorbing and heating material releases heat by absorbing sweat moisture and breaking hydrogen bonds; the metal oxide coating reflects human body infrared rays and reduces heat loss. The heated quilt or sheet realizes passive heat preservation or active heating through the coating to meet the heat preservation needs during sleep improvement.

[0004] Silica aerogel is popular in many fields such as thermal insulation, environmental purification, energy storage and conversion, catalytic reaction, and biomedicine due to its lightness, high porosity, large specific surface area, and low thermal conductivity; however, the surface of silica aerogel powder contains abundant hydroxyl groups, resulting in a relatively high surface energy and easy aggregation, which limits the full play of its excellent properties. Summary of the Invention

[0005] The purpose of the present invention is to provide a far-infrared heating silicon-based material and a preparation method thereof. The present invention relates to a combination of modifying silica aerogel and a heating material, so that the finally prepared fabric not only has excellent heating and heat preservation properties, but also can emit far-infrared rays more efficiently during use, thereby providing a more comfortable and warm experience for users.

[0006] The purpose of the present invention can be achieved by the following technical solutions:

[0007] A far-infrared heating silicon-based material includes the following components by weight:

[0008] 60 - 72 parts of polyacrylamide, 10 - 13 parts of organically modified heat - generating particles, 4.6 - 5.2 parts of modified silica aerogel, 0.4 - 0.8 parts of protective agent, 1.8 - 2.2 parts of thickener, 0.2 - 0.4 parts of ultraviolet absorber, 0.3 - 0.5 parts of antioxidant, 0.2 - 0.4 parts of functional additive, and 110 - 120 parts of deionized water.

[0009] As a preferred technical solution of the present invention, polyacrylamide is used as a finishing agent for fabric post - treatment. Polyacrylamide can form a soft, wrinkle - resistant, and mold - resistant protective layer on the fabric surface, improving the physical properties and durability of the fabric; polyacrylamide can also prevent static electricity generation during fabric processing or use through its properties and enhance the flame - retardant performance, improving safety.

[0010] As a preferred technical solution of the present invention, the thickener is hydroxypropyl methylcellulose; the protective agent is polyvinyl alcohol; PVA can form a transparent and flexible film on the fiber surface, reducing friction and mechanical damage during processing; the ultraviolet absorber is titanium dioxide.

[0011] As a preferred technical solution of the present invention, the functional additive is epoxy - terminated silicone oil; heat - generating particles, titanium dioxide particles, etc. can be embedded in the silicone oil cross - linked network, enhancing the uniformity and adhesion of the fabric coating; the antioxidant is one or more of antioxidant 1010, antioxidant 1076, and antioxidant 168.

[0012] As a preferred technical solution of the present invention, the preparation method of the modified silica aerogel includes the following steps:

[0013] Mix the silica aerogel powder and the catalyst, add n - tridecanol and heat - mix, centrifuge to obtain the solid, wash it, and then vacuum - dry it in an oven to obtain the product.

[0014] As a preferred technical solution of the present invention, in the preparation of the modified silica aerogel, the heat - mixing is stirring at 90 °C for 5 - 6 h; the particle size of the silica aerogel powder is 50 nm; the mass ratio of the silica aerogel powder, the catalyst, and n - tridecanol is 20 - 25∶0.92 - 1.0∶100 - 110; the washing is washing 3 times with anhydrous ethanol; the vacuum - drying in the oven is vacuum - drying to constant weight in an oven at 80 °C; the catalyst is composed of p - toluenesulfonic acid and glacial acetic acid mixed according to a mass ratio of 4:1.

[0015] As a preferred technical solution of the present invention, the preparation method of the organically modified heat - generating particles includes the following steps:

[0016] 1) Place magnesium oxide in a coupling agent, heat and stir, filter to obtain the solid, dry it, and then calcine it to obtain composite particles.

[0017] 2) Under an inert atmosphere, disperse the composite particles in an amino acid solution by ultrasonic treatment, add an acrolein solution, heat and mix, perform rotary evaporation, wash, and vacuum dry in an oven to obtain modified particles;

[0018] 3) Under an inert atmosphere, disperse the modified particles in deionized water by ultrasonic treatment, add a monomer solution, raise the temperature, then add an initiator and raise the temperature with stirring. After cooling to room temperature, add acetone for precipitation and washing, and vacuum dry in an oven to obtain the product.

[0019] As a preferred technical solution of the present invention, the present invention uses a magnesium oxide / aluminum oxide / zirconium oxide composite heating material, which has a good effect of emitting far-infrared rays. The introduction of carbon elements can enhance its penetration effect into human tissues, form a stronger resonance effect, and intensify molecular motion; therefore, the dispersibility and compatibility of the heating material during the formation of the polyacrylamide protective layer are particularly important for its heating and warming effect.

[0020] As a preferred technical solution of the present invention, the lattice vibration frequency of the Mg-O bond in magnesium oxide is close to the electromagnetic wave frequency in the 8-13 μm band. After forming a photon-phonon coupling mode, the mid-infrared band emissivity of aluminum oxide / zirconium oxide can be enhanced.

[0021] As a preferred technical solution of the present invention, in step 1), the ultrasonic dispersion is performed at a power of 200-300 W for 30-40 min; the heating and stirring are performed at a temperature of 65-70 °C for 6-8 h; the drying is performed at a temperature of 110 °C for 2 h; the calcination is performed at a temperature of 400-420 °C for 2-3 h; the mass ratio of magnesium oxide, absolute ethanol, and coupling agent is 15-18:30-40:10-14; the coupling agent is an aluminum zirconate coupling agent, model LD-139; the magnesium oxide is light magnesium oxide with a density of 3.58 g / cm 3 ; the aluminum aluminate coupling agent in the comparative example has a model of DL-411.

[0022] As a preferred technical solution of the present invention, in step 2), the inert atmosphere is a nitrogen atmosphere; the heating and mixing are performed at a temperature of 42-50 °C and a stirring speed of 600-800 rpm for 4-5 h; the washing is performed 4 times with absolute ethanol; the vacuum drying in the oven is performed in an oven at a temperature of 80 °C until constant weight; the mass ratio of the composite particles, amino acid solution, and acrolein solution is 13-15:70-80:15-16.

[0023] As a preferred technical solution of the present invention, in step 2), the amino acid solution is prepared by mixing an amino acid and deionized water in a mass ratio of 1.0-1.2:55-60; the amino acid is one or more of threonine, glutamic acid, valine and lysine; the acrolein solution is prepared by mixing acrolein and absolute ethanol in a mass ratio of 2.2-3.0:12-15.

[0024] As a preferred technical solution of the present invention, in step 3), the inert atmosphere is a nitrogen atmosphere; the ultrasonic dispersion is carried out by ultrasonic waves at a power of 200-300 W for 5-8 min; the temperature rise is to heat up to a temperature of 60-70 °C; the temperature rise and stirring are carried out by stirring at a rotation speed of 400-600 rpm at a temperature of 70-80 °C for 5-6 h; the vacuum drying in the oven is carried out until constant weight in an oven at a temperature of 60 °C; the mass ratio of the modified particles, deionized water, monomer solution and initiator is 10-12:40-50:15-20:0.10-0.12; the monomer solution is prepared by mixing acrylamide, acrylic acid and deionized water in a mass ratio of 20-23:11-12:70-76; the initiator is ammonium cerium nitrate.

[0025] As a preferred technical solution of the present invention, a preparation method of a far-infrared heating silicon-based material includes the following steps: preheating deionized water to a temperature of 40 °C, adding polyacrylamide, organically modified heating particles, modified silica aerogel, protective agent, thickening agent, ultraviolet absorber, antioxidant and functional auxiliary agent, and stirring at a rotation speed of 500-800 rpm for 30-45 min to obtain the product.

[0026] Advantages of the present invention:

[0027] The present invention relates to a combination modified by silica aerogel and a heating material, so that the finally prepared fabric not only has excellent heating and warming performance, but also can emit far-infrared rays more efficiently during use, thereby providing a more comfortable and warm experience for users. Detailed implementation manners

[0028] To further elaborate on the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the following examples are used to describe in detail the specific implementation manners, structures, features and effects according to the present invention.

[0029] Example 1

[0030] A far-infrared heating silicon-based material includes the following components by weight:

[0031] 60 parts of polyacrylamide, 10 parts of organically modified heat-generating particles, 4.6 parts of modified silica aerogel, 0.4 part of protective agent, 1.8 parts of thickening agent, 0.2 part of ultraviolet absorber, 0.3 part of antioxidant, 0.2 part of functional auxiliary agent, and 110 parts of deionized water.

[0032] The thickening agent is hydroxypropyl methylcellulose;

[0033] The protective agent is polyvinyl alcohol;

[0034] The ultraviolet absorber is titanium dioxide;

[0035] The functional auxiliary agent is terminal epoxy group silicone oil;

[0036] The antioxidant is composed of antioxidant 1010, antioxidant 1076, and antioxidant 168 mixed in a mass ratio of 2:1.2:0.6;

[0037] The preparation method of the modified silica aerogel includes the following steps:

[0038] Mix the silica aerogel powder and the catalyst, add n-tridecanol and heat and mix, centrifuge to obtain the solid, wash it, and vacuum dry it in an oven to obtain it; wherein, the heating and mixing is stirring at 90°C for 5 h; the particle size of the silica aerogel powder is 50 nm; the mass ratio of the silica aerogel powder, the catalyst, and n-tridecanol is 20:0.92:100; the washing is washing 3 times with absolute ethanol; the vacuum drying in the oven is vacuum drying to constant weight in an oven at 80°C.

[0039] The preparation method of the organically modified heat-generating particles includes the following steps:

[0040] 1) Place magnesium oxide in a coupling agent, heat and stir, filter to obtain the solid, dry it and then calcine it to obtain composite particles; wherein, the ultrasonic dispersion is ultrasonic dispersion at 200 W for 30 min; the heating and stirring is stirring at 65°C for 6 h; the drying is drying at 110°C for 2 h; the calcination is calcination at 400°C for 2 h; the mass ratio of magnesium oxide, absolute ethanol, and the coupling agent is 15:30:10; the coupling agent is aluminum zirconate coupling agent;

[0041] 2) Under an inert atmosphere, disperse the composite particles in an amino acid solution by ultrasonic treatment, add an acrolein solution, heat and mix, perform rotary evaporation, wash, and then vacuum dry in an oven to obtain modified particles; wherein, the inert atmosphere is a nitrogen atmosphere; the heating and mixing is stirring at a temperature of 42°C and a rotation speed of 600 rpm for 4 h; the washing is washing 4 times with absolute ethanol; the vacuum drying in the oven is vacuum drying in an oven at a temperature of 80°C until constant weight; the mass ratio of the composite particles, the amino acid solution, and the acrolein solution is 13:70:15; the amino acid solution is prepared by mixing an amino acid and deionized water at a mass ratio of 1.0:55; the amino acid is threonine; the acrolein solution is prepared by mixing acrolein and absolute ethanol at a mass ratio of 2.2:12;

[0042] 3) Under an inert atmosphere, disperse the modified particles in deionized water by ultrasonic treatment, add a monomer solution, raise the temperature, add an initiator, and then stir while raising the temperature. After cooling to room temperature, add acetone for precipitation washing, and then vacuum dry in an oven to obtain the product; wherein, the inert atmosphere is a nitrogen atmosphere; the ultrasonic dispersion is ultrasonic treatment at a power of 200 W for 5 min; the temperature raising is heating to a temperature of 60°C; the stirring while raising the temperature is stirring at a temperature of 70°C and a rotation speed of 400 rpm for 5 h; the vacuum drying in the oven is vacuum drying in an oven at a temperature of 60°C until constant weight; the mass ratio of the modified particles, deionized water, the monomer solution, and the initiator is 10:40:15:0.10; the monomer solution is prepared by mixing acrylamide, acrylic acid, and deionized water at a mass ratio of 20:11:70; the initiator is ammonium cerium nitrate.

[0043] A preparation method of a far-infrared heating silicon-based material comprises the following steps: Preheat deionized water to a temperature of 40°C, add polyacrylamide, organically modified heating particles, modified silica aerogel, a protective agent, a thickening agent, an ultraviolet absorber, an antioxidant, and a functional auxiliary agent, and stir at a rotation speed of 500 rpm for 30 min to obtain the product.

[0044] Example 2

[0045] A far-infrared heating silicon-based material comprises the following components by weight:

[0046] 66 parts of polyacrylamide, 12 parts of organically modified heating particles, 4.9 parts of modified silica aerogel, 0.6 part of protective agent, 2 parts of thickening agent, 0.3 part of ultraviolet absorber, 0.4 part of antioxidant, 0.3 part of functional auxiliary agent, and 115 parts of deionized water.

[0047] The thickening agent is hydroxypropyl methylcellulose;

[0048] The protective agent is polyvinyl alcohol;

[0049] The ultraviolet absorber is titanium dioxide;

[0050] The functional additive is an epoxy-terminated silicone oil;

[0051] The antioxidant is composed of antioxidant 1010, antioxidant 1076 and antioxidant 168 mixed in a mass ratio of 2:1.2:0.6;

[0052] The preparation method of the modified silica aerogel includes the following steps:

[0053] Mix the silica aerogel powder and the catalyst, add n-tridecanol and heat and mix, centrifuge to obtain the solid, wash it, and vacuum dry it in an oven to obtain it; wherein, the heating and mixing is stirring at a temperature of 90 °C for 5.5 h; the particle size of the silica aerogel powder is 50 nm; the mass ratio of the silica aerogel powder, the catalyst and n-tridecanol is 22:0.96:105; the washing is washing 3 times with anhydrous ethanol; the vacuum drying in the oven is vacuum drying in an oven at a temperature of 80 °C until constant weight.

[0054] The preparation method of the organically modified heat-generating particles includes the following steps:

[0055] 1) Place magnesium oxide in a coupling agent, heat and stir, filter to obtain the solid, dry it and then calcine it to obtain composite particles; wherein, the ultrasonic dispersion is ultrasonic dispersion at a power of 250 W for 35 min; the heating and stirring is stirring at a temperature of 68 °C for 7 h; the drying is drying at a temperature of 110 °C for 2 h; the calcination is calcination at a temperature of 410 °C for 2.5 h; the mass ratio of magnesium oxide, anhydrous ethanol and the coupling agent is 16:35:12; the coupling agent is an aluminum zirconate coupling agent;

[0056] 2) Under an inert atmosphere, place the composite particles in an amino acid solution for ultrasonic dispersion, add an acrolein solution and heat and mix, rotary evaporate, wash, and vacuum dry in an oven to obtain modified particles; wherein, the inert atmosphere is a nitrogen atmosphere; the heating and mixing is stirring at a temperature of 46 °C at a rotation speed of 700 rpm for 4.5 h; the washing is washing 4 times with anhydrous ethanol; the vacuum drying in the oven is vacuum drying in an oven at a temperature of 80 °C until constant weight; the mass ratio of the composite particles, the amino acid solution and the acrolein solution is 14:75:15.5; the amino acid solution is composed of amino acid and deionized water mixed in a mass ratio of 1.1:58; the amino acid is threonine; the acrolein solution is composed of acrolein and anhydrous ethanol mixed in a mass ratio of 2.6:14;

[0057] 3) Under an inert atmosphere, disperse the modified particles in deionized water by ultrasonic treatment, add the monomer solution, heat it up, add the initiator, and then stir while heating. After cooling to room temperature, add acetone for precipitation and washing, and then dry it in a vacuum oven to obtain the product. Among them, the inert atmosphere is a nitrogen atmosphere; the ultrasonic dispersion is carried out at a power of 250 W for 6 min; the heating is to heat up to 65 °C; the stirring while heating is carried out at 75 °C and 500 rpm for 5.5 h; the vacuum drying in the oven is to dry it in a vacuum oven at 60 °C until constant weight; the mass ratio of the modified particles, deionized water, monomer solution, and initiator is 11:45:18:0.11; the monomer solution is composed of acrylamide, acrylic acid, and deionized water mixed according to the mass ratio of 22:11.5:73; the initiator is ammonium cerium nitrate.

[0058] A preparation method of a far-infrared heating silicon-based material comprises the following steps: Preheat deionized water to 40 °C, add polyacrylamide, organically modified heating particles, modified silica aerogel, protective agent, thickening agent, ultraviolet absorber, antioxidant, and functional auxiliary agent, and stir at 650 rpm for 38 min to obtain the product.

[0059] Example 3

[0060] A far-infrared heating silicon-based material by weight comprises the following components:

[0061] 72 parts of polyacrylamide, 13 parts of organically modified heating particles, 5.2 parts of modified silica aerogel, 0.8 part of protective agent, 2.2 parts of thickening agent, 0.4 part of ultraviolet absorber, 0.5 part of antioxidant, 0.4 part of functional auxiliary agent, and 120 parts of deionized water.

[0062] The thickening agent is hydroxypropyl methylcellulose;

[0063] The protective agent is polyvinyl alcohol;

[0064] The ultraviolet absorber is titanium dioxide;

[0065] The functional auxiliary agent is epoxy-terminated silicone oil;

[0066] The antioxidant is composed of antioxidant 1010, antioxidant 1076, and antioxidant 168 mixed according to the mass ratio of 2:1.2:0.6;

[0067] The preparation method of the modified silica aerogel comprises the following steps:

[0068] Mix the silica aerogel powder and the catalyst, add n-tridecanol and heat them for mixing, centrifuge to obtain the solid, wash it, and then vacuum dry it in an oven to obtain the product. Among them, the heating and mixing is stirring at 90 °C for 6 h; the particle size of the silica aerogel powder is 50 nm; the mass ratio of the silica aerogel powder, the catalyst and n-tridecanol is 25∶1.0∶110; the washing is washing 3 times with absolute ethanol; the vacuum drying in the oven is vacuum drying in an oven at 80 °C until constant weight.

[0069] The preparation method of the organic modified heat-generating particles comprises the following steps:

[0070] 1) Place magnesium oxide into a coupling agent, heat and stir, filter to obtain the solid, dry it and then calcine it to obtain composite particles. Among them, the ultrasonic dispersion is ultrasonic dispersion at 300 W power for 40 min; the heating and stirring is stirring at 70 °C for 8 h; the drying is drying at 110 °C for 2 h; the calcination is calcination at 420 °C for 3 h; the mass ratio of the magnesium oxide, absolute ethanol and the coupling agent is 18∶40∶14; the coupling agent is an aluminum zirconate coupling agent;

[0071] 2) Under an inert atmosphere, place the composite particles into an amino acid solution for ultrasonic dispersion, add an acrolein solution and heat for mixing, rotary evaporate, wash, and then vacuum dry in an oven to obtain modified particles. Among them, the inert atmosphere is a nitrogen atmosphere; the heating and mixing is stirring at 50 °C and 800 rpm for 5 h; the washing is washing 4 times with absolute ethanol; the vacuum drying in the oven is vacuum drying in an oven at 80 °C until constant weight; the mass ratio of the composite particles, the amino acid solution and the acrolein solution is 15∶80∶16; the amino acid solution is composed of an amino acid and deionized water mixed according to a mass ratio of 1.2∶60; the amino acid is threonine; the acrolein solution is composed of acrolein and absolute ethanol mixed according to a mass ratio of 3.0∶15;

[0072] 3) Under an inert atmosphere, place the modified particles into deionized water for ultrasonic dispersion, add a monomer solution, heat up and then add an initiator and heat for stirring. After cooling to room temperature, add acetone for precipitation washing, and then vacuum dry in an oven to obtain the product. Among them, the inert atmosphere is a nitrogen atmosphere; the ultrasonic dispersion is ultrasonic dispersion at 300 W power for 8 min; the heating up is heating up to 70 °C; the heating and stirring is stirring at 80 °C and 600 rpm for 6 h; the vacuum drying in the oven is vacuum drying in an oven at 60 °C until constant weight; the mass ratio of the modified particles, deionized water, the monomer solution and the initiator is 12∶50∶20∶0.12; the monomer solution is composed of acrylamide, acrylic acid and deionized water mixed according to a mass ratio of 23∶12∶76; the initiator is ammonium cerium nitrate.

[0073] A preparation method of a far-infrared heating silicon-based material includes the following steps: Preheat deionized water to a temperature of 40°C, add polyacrylamide, organically modified heating particles, modified silica aerogel, protective agent, thickening agent, ultraviolet absorber, antioxidant, and functional auxiliary agent, and stir at 800 rpm for 45 minutes to obtain the product.

[0074] Comparative Example 1

[0075] Compared with Example 3, the difference in Comparative Example 1 is that silica aerogel powder is used instead of modified silica aerogel, and the other components, preparation steps, and parameters are the same.

[0076] Comparative Example 2

[0077] Compared with Example 3, the difference in Comparative Example 2 is that amino acids are not used, and the other components, preparation steps, and parameters are the same.

[0078] Comparative Example 3

[0079] Compared with Example 3, the difference in Comparative Example 3 is that acrolein is not used, and the other components, preparation steps, and parameters are the same.

[0080] Comparative Example 4

[0081] Compared with Example 3, the difference in Comparative Example 4 is that acrylamide is used instead of acrylic acid, and the other components, preparation steps, and parameters are the same.

[0082] Comparative Example 5

[0083] Compared with Example 3, the difference in Comparative Example 5 is that acrylic acid is used instead of acrylamide, and the other components, preparation steps, and parameters are the same.

[0084] Comparative Example 6

[0085] Compared with Example 3, the difference in Comparative Example 6 is that the coupling agent in step 1) is aluminate coupling agent, and the other components, preparation steps, and parameters are the same.

[0086] Comparative Example 7

[0087] Compared with Example 3, the difference in Comparative Example 7 is that functional auxiliary agent is not used, and the other components, preparation steps, and parameters are the same.

[0088] Immerse the pure cotton fabric in the far-infrared heating silicon-based materials prepared in Examples 1-3 and Comparative Examples 1-7 at a volume ratio of 1:30, immerse for 30 minutes, take out, and dry at 90°C for 40 minutes to obtain the fabric. Test its heating performance according to FZ / T73036-2010, and the test results are shown in Table 1.

[0089] Table 1

[0090]

[0091]

[0092] As can be seen from the test results in Table 1, compared with Comparative Examples 1-7, the ultra-far infrared heating silicon-based material prepared by the present invention has excellent heating and warming effects when applied to fabrics.

[0093] In the present invention, the surface of silica aerogel is modified with tridecanol to graft alkyl chain segments with hydrophobic properties to form an organic structure, which weakens the surface energy of silica aerogel, reduces its self-aggregation phenomenon, improves its dispersibility, and enables the prepared fabric to have a higher heating and warming function; in addition, in the present invention, aluminum zirconium coupling agent is grafted on the surface of magnesium oxide, and after calcination, composite particles of magnesium oxide / zirconium oxide / aluminum oxide / metal carbide are formed, which have a good effect of emitting far infrared rays. Then, amino acids can form an organic-inorganic network structure with the composite particles through hydrogen bond interaction. By forming a covalent bond connection between chitosan and acrolein, while changing the surface properties of the composite particles, the introduced carbon-carbon double bond can participate in the copolymerization reaction between acrylic acid and acrylamide, increasing its binding force and coating effect. Acrylic acid can increase the organic coating effect through the interaction between the carboxyl group and the hydroxyl group and amino group on the amino acid. The combination of acrylic acid and acrylamide can significantly improve the dispersibility effect of the composite particles in the polyacrylamide system; the carboxyl groups on acrylic acid and amino acids can also form an interaction force with the hydroxyl groups of the modified silica aerogel, further strengthening the compatibility of the silica aerogel in the system and further improving the warming effect; the epoxy groups of the terminal epoxy group silicone oil have good affinity for fabric fibers, polyacrylamide and inorganic fillers, and can increase the interfacial binding force.

[0094] The above are only the preferred embodiments of the present invention, and do not impose any form of limitation on the present invention. Although the present invention has been disclosed above with preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some changes or modifications to the above-disclosed technical content to obtain equivalent embodiments with equivalent changes, but as long as the technical content of the present invention is not departed from, any indirect modification, equivalent change and modification made to the above embodiments based on the technical essence of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. An ultra-far infrared heating silicon-based material, characterized in that: The components include the following by weight: 60-72 parts of polyacrylamide, 10-13 parts of organic modified heating particles, 4.6-5.2 parts of modified silica aerogel, 0.4-0.8 parts of protective agent, 1.8-2.2 parts of thickener, 0.2-0.4 parts of ultraviolet absorber, 0.3-0.5 parts of antioxidant, 0.2-0.4 parts of functional additives and 110-120 parts of deionized water; Wherein, the preparation method of the modified silica aerogel comprises the following steps: The silica aerogel powder and the catalyst are mixed, n-tridecanol is added, the mixture is heated and mixed, the solid is taken out by centrifugation, washed, and vacuum dried in an oven to obtain the product.

2. The ultra-far infrared heating silicon-based material according to claim 1, characterized in that: The thickener is hydroxypropyl methylcellulose; the protective agent is polyvinyl alcohol; and the ultraviolet absorber is titanium dioxide.

3. The ultra-far infrared heating silicon-based material according to claim 1, characterized in that: The functional auxiliary agent is epoxy-terminated silicone oil; the antioxidant is one or more of antioxidant 1010, antioxidant 1076 and antioxidant 168.

4. The ultra-far infrared heating silicon-based material according to claim 1, characterized in that: In the preparation of the modified silica aerogel, the heating and mixing is stirring at a temperature of 90°C for 5-6 hours; the particle size of the silica aerogel powder is 50nm; the mass ratio of the silica aerogel powder, the catalyst and n-tridecanol is 20-25:0.92-1.0:100-110; the washing is washing with anhydrous ethanol for 3 times; the vacuum drying in an oven is vacuum drying in an oven at a temperature of 80°C to constant weight; the catalyst is prepared by mixing p-toluenesulfonic acid and glacial acetic acid in a mass ratio of 4:

1.

5. The ultra-far infrared heating silicon-based material according to claim 1, characterized in that: The preparation method of the organic modified heat-generating particles comprises the following steps: 1) Place magnesium oxide in a coupling agent, heat and stir, filter out the solid, dry and calcine to obtain composite particles; 2) Under an inert atmosphere, the composite particles are placed in an amino acid solution for ultrasonic dispersion, acrolein solution is added, heated and mixed, rotary evaporated, washed, and vacuum dried in an oven to obtain modified particles; 3) In an inert atmosphere, the modified particles are placed in deionized water for ultrasonic dispersion, the monomer solution is added and heated, and then the initiator is added and heated and stirred. After cooling to room temperature, acetone is added for precipitation and washing, and vacuum drying is performed in an oven to obtain the obtained particles.

6. The ultra-far infrared heating silicon-based material according to claim 5, characterized in that: In step 1), the ultrasonic dispersion is performed at a power of 200-300W for 30-40 minutes; the heating and stirring is performed at a temperature of 65-70°C for 6-8 hours; the drying is performed at a temperature of 110°C for 2 hours; the calcination is performed at a temperature of 400-420°C for 2-3 hours; the mass ratio of the magnesium oxide, anhydrous ethanol and coupling agent is 15-18:30-40:10-14; and the coupling agent is an aluminum zirconate coupling agent.

7. The ultra-far infrared heating silicon-based material according to claim 5, characterized in that: In step 2), the inert atmosphere is a nitrogen atmosphere; the heating and mixing is stirring at a temperature of 42-50°C and a speed of 600-800 rpm for 4-5 hours; the cleaning is cleaning with anhydrous ethanol for 4 times; the vacuum drying in an oven is vacuum drying in an oven at a temperature of 80°C to constant weight; the mass ratio of the composite particles, the amino acid solution and the acrolein solution is 13-15:70-80:15-16.

8. The ultra-far infrared heating silicon-based material according to claim 5, characterized in that: The amino acid solution is prepared by mixing amino acids and deionized water at a mass ratio of 1.0-1.2:55-60; the amino acids are one or more of threonine, glutamic acid, valine and lysine; the acrolein solution is prepared by mixing acrolein and anhydrous ethanol at a mass ratio of 2.2-3.0:12-15.

9. The ultra-far infrared heating silicon-based material according to claim 5, characterized in that: In step 3), the inert atmosphere is a nitrogen atmosphere; the ultrasonic dispersion is performed at a power of 200-300W for 5-8 minutes; the heating is performed by heating to a temperature of 60-70°C; the heating stirring is performed by stirring at a temperature of 70-80°C and a speed of 400-600rpm for 5-6h; the vacuum drying in an oven is performed in an oven at a temperature of 60°C to a constant weight; the mass ratio of the modified particles, deionized water, monomer solution and initiator is 10-12:40-50:15-20:0.10-0.12; the monomer solution is prepared by mixing acrylamide, acrylic acid and deionized water in a mass ratio of 20-23:11-12:70-76; and the initiator is ammonium cerium nitrate.

10. A method for preparing the ultra-far infrared heat-generating silicon-based material according to any one of claims 1 to 9, characterized in that: The preparation method comprises the following steps: preheating deionized water to 40° C., adding polyacrylamide, organic modified heating particles, modified silica aerogel, protective agent, thickener, ultraviolet absorber, antioxidant and functional additive, and stirring at 500-800 rpm for 30-45 minutes to obtain the product.

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