A composite material for indoor rooms and a method for producing the same

Abstract

The present application relates to the technical field of filler, especially to a kind of composite material for indoor room and preparation method thereof, to solve the problems such as the function of tourmaline is weakened in the preparation process of existing filler.The present application provides a kind of composite material for indoor room, the raw material of the composite material for indoor room includes: 28%~47% of perlite ore particles, 53%~72% of tourmaline by weight percentage;The composite material for indoor room is prepared by mixing perlite ore particles and tourmaline, and 10%~20% of graphene dispersion liquid of total raw material weight is used as a post-modifier, the composite material for indoor room provided by the present application is a kind of material with porous, low density, high far infrared, high negative ion effect.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of fillers, in particular to a composite material for indoor rooms and a preparation method thereof. BACKGROUND

[0002] Far infrared rays are a kind of electromagnetic radiation, whose wavelength range is usually in the long wave band of the infrared spectrum, and the wavelength is about 3 microns to 1 millimeter. Far infrared rays have applications in the medical and health fields, and have two effects on the human body: one is a warming effect: far infrared rays can be used to produce a warming effect, which can be used to relieve muscle tension or soothe body pain. The other is a relaxing effect: contact with far infrared radiation helps to relax the body and mind, and if in a state of tension or anxiety before going to sleep, this relaxing effect helps to improve sleep quality.

[0003] Tourmaline is a borosilicate crystal, commonly known as bixie, and is also translated as tomaline. Tourmaline is easy to charge due to its pyroelectricity and piezoelectricity, and is named after the static electricity effect. The main chemical components of tourmaline are SiO2, TiO2, CaO, K2O, Li2O, Al2O3, B2O3, MgO, Na2O, Fe2O3, FeO, MnO2, P2O5, etc. Tourmaline mainly contains more than 10 kinds of trace elements beneficial to the human body such as magnesium, aluminum, iron and boron, and it is a special polar crystal with a special structure, which can generate ions for a long time and permanently release negative air ions and far infrared rays.

[0004] Currently, there are some reports on the preparation of far infrared composite materials by tourmaline. Most of them mix tourmaline as a filler with other functional minerals to obtain a composite material. The existing technology is to simply physically mix and then synthesize far infrared composite materials through high-temperature solid-phase reaction. Using this technology, the interface between tourmaline powder and other inorganic powders diffuses and dissolves to a large extent, thereby covering most of the surface of tourmaline. The far infrared characteristics of the obtained composite material are limited. For example, CN 115028993 A discloses a light and sustainable far infrared composite material and a preparation method thereof. It mainly uses (1) to mix 30-50 parts of tourmaline, 20-30 parts of maifanite, 3-5 parts of yttrium oxide and 2-5 parts of cerium carbonate, and synthesizes a composite ceramic powder by high-temperature solid-phase reaction, and then mixes the composite ceramic powder with 30-50 parts of hollow glass microspheres to obtain a modified composite ceramic powder; (2) to modify the modified composite ceramic powder with a silane coupling agent to obtain a chemically modified composite ceramic powder; (3) to mix 70-90 parts of a polymer resin, 10-20 parts of the chemically modified composite ceramic powder, 1-2 parts of an antioxidant and 1-2 parts of a lubricant, extrude the mixed raw materials, cut and dry them, and finally obtain a light and sustainable far infrared composite material. The data disclosed in the patent show that the 8-14 μm far infrared emissivity is 0.8-0.91. SUMMARY

[0005] The present application aims to provide a composite material for indoor rooms and a preparation method thereof, which overcomes the problem of weakening the function of tourmaline in the prior art filler preparation process, and prepares a material with porosity, low density, high far infrared, and high negative ion effect.

[0006] To solve the above technical problems, the technical scheme provided by the present application is as follows:

[0007] In a first aspect, the present application provides a composite material for indoor rooms, wherein the raw materials of the composite material for indoor rooms comprise, by weight percentage, 28-47% of perlite ore particles and 53-72% of tourmaline.

[0008] The composite material for indoor rooms is prepared by mixing the perlite ore particles and the tourmaline, and using a graphene dispersion liquid accounting for 10-20% of the total weight of the raw materials as a post-modifier.

[0009] In a second aspect, the present application provides a preparation method of the composite material for indoor rooms, comprising the following steps:

[0010] Step 1: mixing the perlite ore particles and the tourmaline particles, ball milling, and sieving to obtain a mixed powder A;

[0011] Step 2: feeding the mixed powder A into a perlite expansion furnace, controlling the middle furnace temperature at a first temperature, expanding and compounding, sieving to obtain a porous composite powder B;

[0012] Step 3: mixing the porous composite powder B with a graphene dispersion liquid, and standing to obtain a wet material C;

[0013] Step 4: drying the wet material C at a second temperature to obtain a graphene-modified composite powder.

[0014] Further,

[0015] In Step 2, the mixed powder A is fed into the perlite expansion furnace, the mixed powder A stays in the furnace for 5-10 seconds, the middle furnace temperature is controlled at the first temperature, and after expansion and compounding, the porous composite powder B is obtained by sieving.

[0016] Further,

[0017] The perlite ore is one or more of perlite, obsidian, and pitchstone.

[0018] Preferably, the perlite ore is selected from Xinyang, Henan.

[0019] Further,

[0020] The chemical formula of the tourmaline is: Na(Li, Al)3Al6(BO3)3(Si6O18 )(OH)4.

[0021] Preferably, the tourmaline is selected from Alatay in Xinjiang, or Fugong, Yuanyang, Gongsan, Baoshan, etc. in Yunnan.

[0022] Further,

[0023] The graphene dispersion liquid is multilayer graphene oxide.

[0024] Further,

[0025] The solid content of the graphene dispersion liquid is 1-2%.

[0026] Further,

[0027] The particle size of the mixed powder A is less than 20um.

[0028] Further,

[0029] The particle size of the porous composite powder B is 50-100um.

[0030] Further,

[0031] The first temperature is 1000-1100 DEG C, and the second temperature is 70-100 DEG C.

[0032] The technical effects that can be achieved by the above technical solutions are as follows:

[0033] 1. The invention is a kind of composite material that tourmaline is loaded on the skeleton of porous expanded perlite by high-temperature compounding of tourmaline and perlite during the expansion of perlite at high temperature, and then modified, which can increase the contact area of filler and air, thereby maximizing the function of tourmaline in radiating far infrared and releasing negative ions.

[0034] 2. Perlite is a kind of acid lava that is formed by rapid cooling of volcanic eruption, and is named for its pearl fissure structure. The appearance of perlite is gray-green, gray-black and black, the fracture is jagged, the structure is dense and massive, and the surface often has arc-shaped condensation cracks. Perlite includes perlite, obsidian and pitchstone. The difference between them is that perlite has arc-shaped cracks formed by condensation, which is called perlite structure, and the water content is 2-6%; pitchstone has a unique pitch luster, and the water content is 6-10%; obsidian has a glass luster and a shell-shaped fracture, and the water content is generally less than 2%. As an important non-metallic mineral resource, perlite has the characteristics of excellent thermal expansion performance, stable chemical properties, light bulk density after expansion, low thermal conductivity, non-toxicity, odorlessness and sound insulation.

[0035] 3. The invention introduces tourmaline particles in the process of perlite expansion, so that the perlite is expanded and compounded with tourmaline at high temperature at the same time. The ball milling of the perlite and tourmaline can improve the surface energy of the powder, and the mechanical energy of the ball milling process is stored in the powder in the form of surface energy during the preparation process, causing lattice defects on the surface of the powder, so that the powder has high activity. Under the action of high temperature, the perlite expands and sintered with the high-activity tourmaline at high temperature at the same time, so that the composite powder with porous expanded perlite as the skeleton and tourmaline is obtained, and then the multi-layer graphene is loaded on the porous composite powder by simple static method, and finally the graphene modified composite powder is obtained. The graphene modified composite powder obtained by the invention has a bulk density of 180-320 kg / m 3 , a water absorption of 44-76%, a far-infrared emissivity of 0.93-0.97, and a negative ion concentration of 4000-6000 / cm 3 .

[0036] In addition, in the present invention, the multi-layer graphene oxide dispersion liquid is directly dried, and the far-infrared emissivity is 0.92-0.93, but after compounding with tourmaline with a far-infrared emissivity of 0.92, the far-infrared emissivity of the obtained composite material is 0.93-0.97. The reason is that due to the special crystal structure of tourmaline and the resulting spontaneous polarization property, at room temperature, once the pressure or temperature changes slightly, the internal particles (polar molecules) will vibrate strongly, and the dipole moment will also change dramatically, causing the polar molecules to be excited to a higher energy level. When it jumps down, it releases excess energy, which can produce strong mid-to-far infrared radiation with a wavelength of 4-14 um and an emissivity of 0.90 or more. Graphene is a new material with sp 2 hybrid bonding carbon atoms tightly packed into a single-layer two-dimensional honeycomb lattice structure, which has excellent thermal and electrical conductivity. After compounding with tourmaline, the temperature changes more frequently in the micro area, thus intensifying the polarization of the tourmaline crystal, and the synergistic effect is realized.

[0037] The far-infrared emissivity is tested by a Fourier transform infrared spectrometer (FTIR, Bruker-80V, Germany), which provides a wave number range of 10000-200 cm -1 , an accuracy of 0.01 cm -1 , a resolution of ≤4 cm -1 , and a far-infrared emissivity test range of 3-14 um.

[0038] 4. The graphene modified composite powder produced by the present application can be used as functional filler in different particle sizes, which can be added to textiles for pillow, mattress, quilt core, quilt cover; can also be added to furniture paint, interior wall paint, etc.; can also be used alone after secondary granulation, so as to improve the sleep quality and health of the residents. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical scheme and advantages of the present application more clear, the present application is further described in detail below in combination with embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application, that is, the described embodiments are only a part of the embodiments of the present application, but not all the embodiments.

[0040] Therefore, the detailed description of the embodiments of the present application provided below is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0041] The experimental methods used in the following examples are conventional methods unless otherwise specified; the reagents, materials, etc. used in the following examples can be obtained from commercial channels unless otherwise specified.

[0042] Example 1

[0043] The raw material is composed of 28% perlite ore particles and 72% tourmaline; 10% graphene dispersion liquid based on the total weight of the raw material is used as a post-modifier, and the solid content of the graphene dispersion liquid is 1%. The process steps are as follows:

[0044] 1) The perlite ore particles and tourmaline particles are mixed and ball milled, and sieved to obtain mixed powder A with a particle size of less than 20um;

[0045] 2) The mixed powder A is sent into a perlite expansion furnace, the middle section furnace temperature is controlled at 1000℃, and the height of the perlite expansion furnace needs to ensure that the mixed powder A can stay in the furnace for 5s-10s. After expansion and compounding, sieving is performed to obtain porous composite powder B with a particle size of 50-100um;

[0046] 3) The porous composite powder B is mixed with the graphene dispersion liquid, and is left to stand for 1h to obtain wet material C;

[0047] 4) The wet material C is dried at 80℃ for 6h to obtain the final graphene modified composite powder.

[0048] The perlite ore is selected from Songtizhi in Xinyang, Henan;

[0049] The tourmaline is selected from Aletai, Xinjiang;

[0050] The bulk density of the obtained composite powder is 305 kg / m 3 , the water absorption is 44%, the far infrared emissivity is 0.97, and the negative ion concentration is 5843 / cm 3 .

[0051] Example 2

[0052] The raw material is composed of 35% perlite ore particles and 65% tourmaline; a graphene dispersion liquid accounting for 15% of the total weight of the raw material is used as a post-modifier, and the solid content of the graphene dispersion liquid is 1.5%. The process steps are as follows:

[0053] 1) The perlite ore particles and tourmaline particles are mixed and then ball milled and sieved to obtain a mixed powder A with a particle size of less than 20 um;

[0054] 2) The mixed powder A is sent into a perlite expansion furnace, and the middle furnace temperature is controlled at 1050°C. The height of the perlite expansion furnace needs to ensure that the mixed powder A can stay in the furnace for 5s-10s. After expansion and compounding, sieving is performed to obtain a porous composite powder B with a particle size of 50-100 um;

[0055] 3) The porous composite powder B is mixed with the graphene dispersion liquid, and is left to stand for 3h to obtain a wet material C;

[0056] 4) The wet material C is dried at 100°C for 3h to obtain the final graphene-modified composite powder.

[0057] The perlite ore is selected from Xinyang perlite in Henan;

[0058] The tourmaline is selected from Altay in Xinjiang;

[0059] The bulk density of the obtained composite powder is 274 kg / m 3 , the water absorption is 52%, the far infrared emissivity is 0.96, and the negative ion concentration is 5321 / cm 3 .

[0060] Example 3

[0061] The raw material is composed of 47% perlite ore particles and 53% tourmaline; a graphene dispersion liquid accounting for 20% of the total weight of the raw material is used as a post-modifier, and the solid content of the graphene dispersion liquid is 2%. The process steps are as follows:

[0062] 1) The perlite ore particles and tourmaline particles are mixed and then ball milled and sieved to obtain a mixed powder A with a particle size of less than 20 um;

[0063] 2) Put the mixed powder A into the perlite expansion furnace, control the middle furnace temperature at 1100℃, the height of the perlite expansion furnace needs to ensure that the mixed powder A can stay in the furnace for 5s-10s, after expansion and compounding, sieve to get 50-100um porous compound powder B;

[0064] 3) Mix the porous compound powder B with graphene dispersion liquid, stand for 3h, get wet material C;

[0065] 4) Dry the wet material C at 70℃ for 8h, get the final graphene modified compound powder.

[0066] The perlite ore is selected from Henan Xinyang obsidian;

[0067] The tourmaline is selected from Xinjiang Altay;

[0068] The obtained compound powder has a bulk density of 182kg / m 3 , a water absorption of 76%, a far infrared emissivity of 0.95, and a negative ion concentration of 4954 / cm 3 .

[0069] Comparative Example 1

[0070] The raw material is composed of 28% of perlite ore particles and 53% of tourmaline. The process steps are as follows: 1) Mix the perlite ore particles and tourmaline particles, then ball mill and sieve to get the mixed powder A with particle size less than 20um;

[0071] 2) Put the mixed powder A into the perlite expansion furnace, control the middle furnace temperature at 1000℃, the height of the perlite expansion furnace needs to ensure that the mixed powder A can stay in the furnace for 5s-10s, after expansion and compounding, sieve to get 50-100um porous compound powder B.

[0072] The perlite ore is selected from Henan Xinyang pitchstone;

[0073] The tourmaline is selected from Xinjiang Altay;

[0074] The obtained compound powder has a bulk density of 303kg / m 3 , a water absorption of 46%, a far infrared emissivity of 0.91, and a negative ion concentration of 5001 / cm 3 .

[0075] Comparative Example 2

[0076] The raw material is composed of 100% of Xinjiang Altay tourmaline particles. The tourmaline particles are ball milled and sieved to get tourmaline powder with particle size of 50-100um for testing.

[0077] The obtained tourmaline powder has a bulk density of 909kg / m 3, the water absorption is 3%, the far infrared emissivity is 0.92, and the anion concentration is 4135 / cm 3 .

[0078] As can be seen from Examples 1-3, with the increase of tourmaline content, the far infrared emissivity and the anion concentration are both increased; as can be seen from Comparative Example 1 and Comparative Example 1, the post-modification of graphene helps to greatly improve the far infrared emissivity; as can be seen from Comparative Example 1 and Comparative Example 2, the powder not compounded with perlite has a large bulk density and low water absorption, i.e. a relatively dense rather than porous structure, which will greatly affect the far infrared and anion concentration performance.

[0079] Finally, it should be noted that: the above examples are only used to illustrate the technical solutions of the present application, but not to limit it; although the present application has been described in detail with reference to the foregoing examples, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing examples, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A composite material for indoor rooms, characterized in that, The raw materials of the composite material for indoor rooms include: by weight percentage, 28% to 47% perlite particles and 53% to 72% tourmaline; The composite material for indoor rooms is prepared by mixing perlite particles and tourmaline, and using a graphene dispersion accounting for 10% to 20% of the total weight of the raw materials as a post-modifier. The preparation method of the composite material for indoor rooms includes the following steps: Step 1: Mix perlite ore particles and tourmaline particles, then ball mill and sieve to obtain mixed powder A; Step 2: Feed the mixed powder A into the perlite expansion furnace, control the furnace temperature in the middle section to the first temperature, expand and composite, and then sieve to obtain porous composite powder B; Step 3: Mix porous composite powder B with graphene dispersion, let stand, and obtain wet material C; Step 4: Dry the wet material C at the second temperature to obtain graphene-modified composite powder.

2. The method for preparing the composite material for indoor rooms according to claim 1, characterized in that, In step 2, mixed powder A is fed into a perlite expansion furnace. Mixed powder A stays in the furnace for 5 to 10 seconds. The furnace temperature in the middle section is controlled at the first temperature. After expansion and compounding, it is sieved to obtain porous composite powder B.

3. The method for preparing the composite material for indoor rooms according to claim 1, characterized in that, Perlite is one or more of perlite, obsidian, and resinstone.

4. The method for preparing the composite material for indoor rooms according to claim 1, characterized in that, The chemical formula of tourmaline is: Na(Li, Al)3Al6(BO3)3(Si6O 18 )(OH)4.

5. The method for preparing the composite material for indoor rooms according to claim 1, characterized in that, The graphene dispersion is a multilayer graphene oxide.

6. The method for preparing the composite material for indoor rooms according to claim 1, characterized in that, The solid content of the graphene dispersion is 1-2%.

7. The method for preparing the composite material for indoor rooms according to claim 1, characterized in that, The particle size of mixed powder A is less than 20 μm.

8. The method for preparing the composite material for indoor rooms according to claim 1, characterized in that, The particle size of porous composite powder B is 50-100 μm.

9. The method for preparing the composite material for indoor rooms according to claim 1, characterized in that, The first temperature is 1000–1100℃; the second temperature is 70–100℃.