TWI650381B - Microwave heating composite material and its manufacturing method - Google Patents

Abstract

A microwave heating composite material and a manufacturing method thereof, which firstly uniformly mix a carbon material and a first eucalyptus oil into a carbon material dispersion liquid, and then the carbon material dispersion liquid and an uncured first rubber material, a second The eucalyptus oil and a coloring agent are mixed into a bismuth mixture, and the cerium mixture is dispersed. Finally, the cerium mixture is heated to a temperature between room temperature and 200 ° C to harden to form a microwave heating composite material. The microwave heating composite material is formed. The volume resistivity is between 103 Ω•m and 1012 Ω•m, and the carbon material is uniformly dispersed in the first silicone material by first making the carbon material dispersion, thereby making the microwave heat-generating composite uniform It is hot, and the biocompatibility of silicone is good. When it is hot, it can achieve the effect of bionics.

Description

Microwave heating composite material and manufacturing method thereof

The invention relates to a composite material, in particular to a microwave heating composite material and a manufacturing method thereof.

The microwave itself has a heating effect. When the microwave enters from the surface of the medium and propagates inside it, the energy carried by the microwave will be converted into heat energy as it penetrates into the medium. This effect has been widely used in science, medicine, industry, etc. Among the fields.

In the case of microwave-heated media, graphite materials can efficiently absorb electromagnetic waves and convert them into heat in a microwave environment. Therefore, it is a common technique to use graphite or similar materials as a medium for microwave heating, such as the Republic of China. Patent Publication No. 201511039, "Conductive Resin Composition for Microwave Heating", the conductive resin composition for microwave heating contains a non-carbonaceous conductive filler, a curable insulative binder resin, and a volume specific resistance ratio The non-carbonaceous conductive filler is a higher carbonaceous material, and contains carbon having an aspect ratio of 20 or less with respect to 100 parts by mass of the total of the non-carbonaceous conductive filler and the curable insulating binder resin. 1 to 20 parts by mass of the material, wherein the carbonaceous material may be graphite, graphene, fullerene, carbon nanotubes or the like.

In view of the above-mentioned techniques, although it is advocated to suppress the problem of spark generation by receiving microwave heat through the selection of materials, in practice, it is often caused by uneven material dispersion, but still causes smoke or fire, and then burns. The condition of the composite material occurs. Therefore, how to achieve uniform dispersion in the production of microwave heating composite materials is a major issue.

The main object of the present invention is to solve the problem of smoke or fire caused by uneven dispersion of the microwave heat-generating composite material.

In order to achieve the above object, the present invention provides a method for manufacturing a microwave heat-generating composite material, which comprises the following steps: S1: uniformly mixing a carbon material with a first eucalyptus oil into a carbon material dispersion, and dispersing the carbon material first. The first eucalyptus oil, wherein the carbon material is a carbon nanotube or graphene, and the weight percentage of the carbon material in the carbon material dispersion is between 0.01% and 10%; S2: dispersing the carbon material The liquid is mixed with an unhardened first silicone material, a second oil, and a coloring agent to form a gum mixture, the weight percentage of the carbon material in the silicone mixture is between 0.00001% and 2%; S3: the silicone rubber Dissolving the mixture; and S4: heating the silicone mixture to a temperature between room temperature and 200 ° C to harden to form a microwave heat-generating composite having a volume resistivity of 103 Ω•m to 1012 Ω. Between m.

In order to achieve the above object, the present invention also provides a microwave heat-generating composite material which is produced by the above method.

In summary, the present invention first forms the carbon material dispersion, which can make the carbon material disperse more uniformly in the ruthenium mixture, and the microwave heat-generating composite material has lower resistance, which means that the carbon material has good dispersibility. Therefore, the microwave heat-generating composite material can achieve uniform heat generation in a short time, preventing the microwave heat-generating composite material from being burnt, and the surface of the microwave heat-generating composite material has a smooth appearance and a smooth touch, and the biocompatible of the silicone rubber Good sex, when the fever, it can achieve the effect of bionics, but can be applied to artificial prosthetics, sex toys and medical supplies.

The detailed description and technical content of the present invention will now be described as follows:

Please refer to FIG. 1 , which is a microwave heating composite material and a manufacturing method thereof. The manufacturing method comprises the following steps:

S1: uniformly mixing a carbon material and a first eucalyptus oil into a carbon material dispersion, wherein the carbon material may be a carbon nanotube (CNT), graphene (Graphene) or a combination thereof, and the like In the carbon material dispersion, the weight percentage of the carbon material is between 0.01% and 10%, and the balance is the first eucalyptus oil. In the present invention, before the carbon material is mixed with the silicone material, it is first mixed with the first eucalyptus oil to sufficiently disperse the solid carbon material in the liquid first eucalyptus oil, thereby greatly improving the dispersibility. In this embodiment, the first oil is a vinyl eucalyptus oil. In other embodiments, the first eucalyptus oil may also be selected from the group consisting of methyl eucalyptus oil, epoxy eucalyptus oil, and denatured eucalyptus oil.

S2: mixing the mixed carbon material dispersion with an unhardened first silicone material, a second oil, and a coloring agent to form a silicone mixture. In this embodiment, the first silicone material includes separation. The agent A and the agent B are mixed with the carbon material dispersion, the second oil and the coloring agent when performing step S2, wherein the weight percentage of the agent A and the agent B is Each is 50%. The coloring agent can be a color paste, a toner, etc., such as a PepsiCo® SC-COLOR series of color pastes. The weight percentage of the carbon material dispersion in the silicone mixture is between 0.1% and 20% (ie, the weight percentage of the carbon material in the silicone mixture is between 0.00001% and 2%), the first The weight percentage of a silicone material is between 60% and 95%, the weight percentage of the second oil is between 3% and 30%, and the weight percentage of the dye is between 0% and 5%. between. In this embodiment, the second eucalyptus oil is a vinyl eucalyptus oil. In other embodiments, the second eucalyptus oil may also be selected from the group consisting of methyl eucalyptus oil, epoxy eucalyptus oil and denatured eucalyptus oil.

S3: Dispersing the silicone mixture using a mixer, which may be a drum or a mixer.

S4: Finally, the silicone mixture is heated to a temperature between room temperature and 200 ° C to harden the silicone mixture to form a microwave heat-generating composite. Since the method of the present invention first mixes the carbon material with the first emu oil to form a liquid dispersion of the carbon material, and then mixes with other carriers or materials, the tantalum mixture thus obtained, wherein the carbon material has excellent dispersion. Therefore, the microwave heat-generating composite has a volume resistivity of between 103 Ω•m and 1012 Ω•m.

In this embodiment, after step S4, the following steps are further included:

S5: coating a second silicone material on the outer surface of the microwave heating composite. Wherein, the second silicone material may be free of the carbon material, and the two-layer structure is used to improve the degree of freedom of color matching or temperature control.

In order to further clarify the method of the present invention, reference is made to the following examples of the invention in accordance with the present invention, which are provided for the purpose of illustration and are not intended to limit the scope of the invention. Tables 1 and 2 show the chemical compositions of the respective experimental examples and comparative examples. The difference between the experimental example and the comparative example is the source of the carbon material, and the other selected materials are the same. In the experimental examples 1 to 3, the liquid material dispersion liquid is used, and in the comparative examples 1 to 5, the solid state is solid. The carbon material was directly mixed with other materials and heat-formed. The experimental examples and the comparative examples were heated at the same temperature, and were baked at a temperature of 175 ° C for 10 minutes and then baked at a temperature of 200 ° C for 240 minutes. In each of the experimental examples and the comparative examples, the A agent of the first silicone material is a silicone material of the type LSR-2010A supplied by Momentive, and the agent B of the first silicone material is a model LSR-2010B supplied by Momentive. The enamel material is selected from the group consisting of vinyl eucalyptus oil supplied by Shanghai Huazhirun Chemical Co., Ltd., and the coloring agent is a yellow paste.

In Experimental Example 1, the carbon material dispersion is a mixture of a carbon nanotube powder and the vinyl eucalyptus oil, and the weight percentage of the carbon nanotube powder in the carbon material dispersion is 2%, that is, a carbon nanotube powder. The weight is 0.08 g, and the carbon concentration of the experimental example 1 is 0.28%. In the experimental example 2, the carbon material dispersion is a mixture of a carbon nanotube powder and the vinyl eucalyptus oil, and the carbon nanotube powder is dispersed in the carbon material. The weight percentage of the liquid is 2%, that is, the weight of the carbon nanotube powder is 0.1 g, and the carbon concentration of Experimental Example 2 is 0.09%; in Experimental Example 3, the carbon material dispersion is a carbon nanotube powder and the ethylene. The base oil was mixed, and the weight percentage of the carbon nanotube powder in the carbon material dispersion was 2%, that is, the weight of the carbon nanotube powder was 0.2 g, and the carbon concentration in Experimental Example 3 was 0.18%. In Comparative Example 1, the carbon material was selected from the model of Vulcan XC72-CB, and the carbon concentration was 1.6%. In Comparative Example 2, the source of the carbon material was graphite powder, and the carbon concentration was 1.6%; in Comparative Example 3 to Comparative Example 5, the carbon material was selected from the group consisting of carbon nanotube powder, the carbon concentration of Comparative Example 3 was 0.32%, and the carbon concentration of Comparative Example 4 was 7.5%, and the carbon of Comparative Example 5 was used. The concentration is 1.6%. Among them, Experimental Example 2, Experimental Example 3, and Comparative Example 6 were used to verify the toughness of the microwave heat-generating composite material, so that no dye was added.

The composite materials obtained by the above experimental examples and the comparative examples were subjected to a microwave heating test using a microwave power of 1000 W, and the temperatures of the respective experimental examples and the comparative examples were measured every 5 seconds. The results are shown in Table 3; The surface resistance and volume resistivity of each of the experimental examples and the comparative examples were also measured by verifying the dispersion effect of the composite material according to the present invention. The results are shown in Table 4. Table 1, the composition of the experimental examples  <TABLE border="1" borderColor="#000000" width="85%"><TBODY><tr><td> </td><td> Carbon Material Dispersion</td><td> LSR-2010A </td><td> LSR-2010B </td><td> Second Vinyl Emu Oil</td><td> Yellow Paste</td></tr><tr><td> Experimental Example 1 </ Td><td> 4g (carbon concentration: 0.28%) </td><td> 10g </td><td> 10g </td><td> 3.6g </td><td> 1g </td> </tr><tr><td> Experimental Example 2 </td><td> 5g (carbon concentration: 0.09%) </td><td> 47.5g </td><td> 47.5g </td> <td> 5g </td><td> 0 </td></tr><tr><td> Experimental Example 3 </td><td> 10g (carbon concentration: 0.18%) </td><td > 45g </td><td> 45g </td><td> 10g </td><td> 0 </td></tr></TBODY></TABLE> Table 2, composition of each control  <TABLE border="1" borderColor="#000000" width="85%"><TBODY><tr><td> </td><td> Carbon Material</td><td> LSR-2010A </ Td><td> LSR-2010B </td><td> second vinyl eucalyptus oil</td><td> yellow paste</td></tr><tr><td> Comparative Example 1 </td> <td> 0.4g (carbon concentration: 1.6%) </td><td> 10g </td><td> 10g </td><td> 3.6g </td><td> 1g </td>< /tr><tr><td> Comparative Example 2 </td><td> 0.4g (carbon concentration: 1.6%) </td><td> 10g </td><td> 10g </td><td > 3.6g </td><td> 1g </td></tr><tr><td> Comparative Example 3 </td><td> 0.08g (carbon concentration: 0.32%) </td><td > 10g </td><td> 10g </td><td> 3.6g </td><td> 1g </td></tr><tr><td> Comparative Example 4 </td><td > 2g (carbon concentration: 7.5%) </td><td> 10g </td><td> 10g </td><td> 3.6g </td><td> 1g </td></tr> <tr><td> Comparative Example 5 </td><td> 0.4g (carbon concentration: 1.6%) </td><td> 10g </td><td> 10g </td><td> 3.6g </td><td> 1g </td></tr><tr><td> Comparative Example 6 </td><td> 0 </td><td> 47.5g </td><td> 47.5 g </td><td> 5g </td><td> 0 </td></tr></TBODY></TABLE> Table 3, microwave firepower 1000W, microwave time and temperature comparison table  <TABLE border="1" borderColor="#000000" width="85%"><TBODY><tr><td></td><td> Temperature (°C) </td></tr><tr ><td> Microwave time (Sec) </td><td> Experimental example 1 </td><td> Comparative example 1 </td><td> Comparative example 2 </td><td> Comparative example 3 < /td><td> Comparative Example 4 </td><td> Comparative Example 5 </td></tr><tr><td> 0 </td><td> 30.2 </td><td> 29.4 </td><td> 28.4 </td><td> 27.5 </td><td> 28.9 </td><td> 28.7 </td></tr><tr><td> 5 </td ><td> 34.1 </td><td> 30.9 </td><td> 29.3 </td><td> 29.5 </td><td> 34 </td><td> 32.4 </td>< /tr><tr><td> 10 </td><td> 46 </td><td> 32.5 </td><td> 30.6 </td><td> 32.9 </td><td> 54 </td><td> has caught fire</td></tr><tr><td> 15 </td><td> 54 </td><td> 33.7 </td><td> 31.2 </ Td><td> 35 </td><td> 86 </td><td> N/A </td></tr><tr><td> 20 </td><td> 64.2 </td ><td> 34.5 </td><td> 31.6 </td><td> 36 </td><td> smoked</td><td> N/A </td></tr>< Tr><td> 25 </td><td> 74 </td><td> 35 </td><td> 31.9 </td><td> 37 </td><td> N/A </ Td><td> N/A </td></tr><tr><td> 30 </td><td> 94 </td><td> 37.3 </td><td> 32.1 </td ><td> 38.5 </td><td> N/ A </td><td> N/A </td></tr></TBODY></TABLE> Table 4, surface resistance and volume resistivity of each group  <TABLE border="1" borderColor="#000000" width="85%"><TBODY><tr><td></td><td> Experimental Example 1 </td><td> Comparative Example 1 < /td><td> Comparative Example 2 </td><td> Comparative Example 3 </td><td> Comparative Example 4 </td><td> Comparative Example 5 </td></tr><tr> <td> Surface resistance (Ω/sq) </td><td> 2.77e8 </td><td> 1.39e12 </td><td> 1.79e12 </td><td> 4.69e11 </td> <td> 9.64e4 </td><td> less than 1K </td></tr><tr><td> volume resistivity (Ω·m) </td><td> <E+11 </td ><td> > E+12 </td><td> > E+12 </td><td> > E+12 </td><td> < E+6 </td><td> < E +2 </td></tr></TBODY></TABLE>

It can be seen from Table 3 that the heat-generating efficiency of the composite material according to the present invention is much better than that of the comparative example because the carbon material is uniformly mixed with the first vinyl-cement oil into the carbon material dispersion in advance, so that the carbon The material can be uniformly dispersed in the silicone mixture, and the microwave heating composite can achieve uniform heating in a short time, while the comparative example 4 and the comparative example 5 are because the carbon nanotube powder cannot be uniformly dispersed, resulting in Smoke or fire. If the dispersion is uneven, the surface will be rough and affect the appearance and touch of the end product. Since the dispersibility of the carbon material is difficult to measure by standard, the resistance is expressed here. If the resistance is low, the dispersibility of the carbon material is better, but it is particularly noted that the dispersibility is the same concentration. The better, the lower the resistance, but if the concentrations of the two are different, the lower the resistance, the better the dispersion.

Table 4 shows the resistance measurement results of the experimental examples and the respective comparative examples, wherein the experimental example 1 has a good dispersibility of the carbon material, so the resistance value is lower than that of the comparative examples 1, 2 and 3; and as for the comparative examples 4 and 5, The microwave heating experiment described above shows that the dispersibility of the carbon material is not good, so the contribution of the lower resistance value is derived from the higher carbon concentration.

In addition, silicone has good biocompatibility, and when it can be heated, it can effectively achieve the effect of bionics. Therefore, the end products produced can be used for sex toys, robotic bionic muscles and skin, artificial prostheses, etc. Supplies, because they can be heated in a microwave oven, so the waiting time is short, the user experience is good, and can be combined with VR, AR, MR technology, or other devices, such as vibration components, to achieve the best bionic and virtual reality effects .

Moreover, when applied, the exterior of the microwave heat-generating composite material may be coated with other substances for performing dyeing and the like. In the following, other experimental examples were prepared to illustrate that Experimental Example 2 was the same as Experimental Example 1, and the exterior was not colored, and Experimental Example 3 was that the exterior of Experimental Example 1 was colored, and the weight of the colored coating layer was about 10.137 g. The microwave heating test was carried out for Experimental Example 2 and Experimental Example 3, and the temperature was measured every 5 seconds with a microwave power of 1000 W. The results are shown in Table 5; in addition, the temperature holding ability was further tested for Experimental Example 2 and Experimental Example 3, The test method is to stop applying microwave, and the composite material is placed in a room temperature environment, and the temperature is measured every 5 seconds. The results are shown in Table 6. Table 5, microwave firepower 1000W, microwave time and temperature comparison table  <TABLE border="1" borderColor="#000000" width="85%"><TBODY><tr><td> Microwave Time (Sec) </td><td> Experimental Example 2 </td><td > Experimental Example 3 </td></tr><tr><td> 0 </td><td> 27.6 </td><td> 27 </td></tr><tr><td> 5 </td><td> 29.7 </td><td> 28.8 </td></tr><tr><td> 10 </td><td> 43.8 </td><td> 43.5 </td ></tr><tr><td> 15 </td><td> 50 </td><td> 58 </td></tr><tr><td> 20 </td><td> 68 </td><td> 70 </td></tr><tr><td> 25 </td><td> 83 </td><td> 80 </td></tr></ TBODY></TABLE> Table 6. Time and temperature comparison table after standing at room temperature after microwave  <TABLE border="1" borderColor="#000000" width="85%"><TBODY><tr><td> Rest time (Min) </td><td> Experiment 2 </td>< Td> Experimental Example 3 </td></tr><tr><td> 5 </td><td> 42.5 </td><td> 65 </td></tr><tr><td> 10 </td><td> 41 </td><td> 57 </td></tr><tr><td> 15 </td><td> 40 </td><td> 53 </ Td></tr><tr><td> 20 </td><td> 38.2 </td><td> 48 </td></tr><tr><td> 25 </td><td > 37.7 </td><td> 44 </td></tr><tr><td> 30 </td><td> 36.9 </td><td> 42 </td></tr>< Tr><td> 40 </td><td> 34.7 </td><td> 38 </td></tr><tr><td> 50 </td><td> 33 </td>< Td> 35 </td></tr><tr><td> 60 </td><td> 32.1 </td><td> 33 </td></tr></TBODY></TABLE>

As can be seen from the above table, even in the case of a coating, the temperature rising rate and the heat generation efficiency of Experimental Example 3 can be maintained as a certain example, and both have a good temperature holding effect. Therefore, it is possible to adjust the color matching and temperature control of the double-layer structure to meet various needs. In addition to the above, it can also be applied to warm packs, antifreeze gloves, antifreeze hoods, antifreeze earmuffs, antifreeze masks, antifreeze helmet linings, mask heating materials and medical hot compress materials.

Further, the inventors of the present invention have further found that the microwave heat-generating composite material obtained by the method of the present invention has superior toughness characteristics, and the result is as shown in "Fig. 2", and the line segment B in "Fig. 2" is for Experimental Example 2. Line C is the stress-strain curve obtained for Comparative Example 6 for the experimental example 3 and the line A. The area under the curve represents the absorption capacity of the material to absorb the tensile deformation energy, that is, the toughness. The area under the curve was calculated. Experimental Example 2 was 20350.3, Experimental Example 3 was 21869.63, and Comparative Example 6 was 14485.26. Therefore, in Experimental Example 2, the toughness system was improved by 40.49% compared with Comparative Example 6, and Experimental Example 3 was compared with Experimental Example 3. In Comparative Example 6, the toughness system was increased by 50.98%.

In summary, the present invention has the following features:

1. The present invention uniformly mixes the carbon material with the first vinyl eucalyptus oil to form the carbon material dispersion, so that the carbon material can be uniformly dispersed in the crepe mixture, and the resistance of the microwave heating composite material is low, that is, The carbon material has good dispersibility, and the microwave heat-generating composite material can achieve uniform heat generation in a short time, and the surface of the microwave heat-generating composite material has a smooth appearance and a smooth touch.

Second, silicone rubber has good biocompatibility. When it can be heated, it can effectively achieve the effect of bionics. Therefore, the products produced can be used for sex toys, robot bionic muscles and skin, artificial prosthetics, warm packs, antifreeze gloves, Antifreeze hood, antifreeze earmuffs, antifreeze mask, antifreeze helmet lining, mask heating material, etc.

3. By forming a two-layer structure by forming a layer of material on the outer surface of the microwave heat-generating composite material, the degree of freedom in color matching or temperature control can be improved.

4. The microwave heat-generating composite material obtained by the method of the present invention has excellent toughness.

The present invention has been described in detail above, but the foregoing is only a preferred embodiment of the present invention, and is not intended to limit the scope of the invention. That is, the equivalent changes and modifications made by the scope of the present application should remain within the scope of the patent of the present invention.

S1~S5‧‧‧Steps

Lines A, B, C‧‧

FIG. 1 is a schematic diagram of a manufacturing process according to an embodiment of the present invention. Figure 2 is a graph of stress-strain curves of the present invention.

Claims (8)

A method for manufacturing a microwave heat-generating composite material, comprising the steps of: S1: mixing a carbon material with a first eucalyptus oil into a carbon material dispersion liquid, wherein the carbon material is first dispersed in the first eucalyptus oil, wherein The first eucalyptus oil and the second eucalyptus oil are independently selected from the group consisting of vinyl eucalyptus oil, methyl eucalyptus oil, epoxy eucalyptus oil and denatured eucalyptus oil, and the carbon material is a carbon nanotube or graphene, and the carbon The weight percentage of the material in the carbon material dispersion is between 0.01% and 10%; S2: mixing the carbon material dispersion with an unhardened first silicone material, a second oil, and a coloring agent to form a silicone a mixture, the weight percentage of the carbon material in the silicone mixture is between 0.00001% and 2%; S3: dispersing the silicone mixture; and S4: heating the silicone mixture to a temperature between room temperature and 200 °C The temperature is hardened to form a microwave heat-generating composite material, and the volume resistivity of the microwave heat-generating composite material is between 103 Ω. m to 1012Ω. Between m. The method for producing a microwave heat-generating composite material according to claim 1, wherein in the step S2, the weight percentage of the carbon material dispersion is between 0.1% and 20%, the first The weight percentage of a silicone material is between 60% and 95%, the weight percentage of the second oil is between 3% and 30%, and the weight percentage of the dye is between 0% and 5%. between. The method of producing a microwave heat-generating composite material according to claim 1, wherein the coloring agent is selected from the group consisting of color pastes, toners, and combinations thereof. The method for producing a microwave heat-generating composite material according to claim 1, wherein in step S3, the silicone rubber mixture is dispersed by a mixer. A method of producing a microwave heat-generating composite material according to claim 4, wherein the mixer is a drum. A method of producing a microwave heat-generating composite material according to claim 4, wherein the mixer is a mixer. The method for manufacturing a microwave heat-generating composite material according to claim 1, wherein after step S4, the method further comprises the step of: coating a second silicone material on the outer surface of the microwave heat-generating composite material. A microwave heat-generating composite material produced by the method of any one of claims 1 to 7.