Magnetic control adhesive material as well as preparation method and application thereof

Abstract

The invention discloses a magnetic control adhesive material as well as a preparation method and application thereof, and belongs to the technical field of adhesive materials. The magnetic control adhesive material is prepared from the following components in parts by weight: 20 to 30 parts of polyurethane, 20 to 25 parts of magnetic powder, 5 to 10 parts of ferric oxide, 5 to 10 parts of activated calcium carbonate and 2.5 to 5 parts of insecticide. The magnetic control adhesive material is prepared by taking polyurethane as a main agent and adding magnetic powder, ferric oxide, activated calcium carbonate and insecticide, and the magnetic control adhesive material is applied to an ancient building under magnetic control, so that the ancient building can be accurately repaired, and the ancient building has relatively high corrosion resistance and strength; meanwhile, under the action of the insecticide, repeated proliferation of pests such as termites and the like can be inhibited, in addition, active calcium carbonate in the material can reduce the surface tension of colloid and enhance the bonding strength and the forming strength, and the structure of the ancient building is restored to be stable.

Description

Technical Field

[0001] The invention belongs to the technical field of adhesive materials, and in particular relates to a magnetron adhesive material and a preparation method and application thereof. Background Art

[0002] Ancient buildings are usually constructed with column-type brick and wood structures, and the load-bearing structure is mainly made of wood. The wood used has almost no ability to resist insect infestation, so ancient buildings are more vulnerable to termites. In the early days, the method of eliminating termites was to spray termite-killing drugs (such as chlordane and mirex) on buildings with termites, or to paint, or to fumigate, etc. The killing effect was obvious and quick. However, it is impossible to eliminate the ant colonies in deep nests, so the termite elimination is not thorough enough and often recurs. With the increasing awareness of ecological environmental protection, people use biological control to introduce natural termite-resistant plants, but it is difficult to use them on ancient buildings and cultural relics, and it is impossible to completely eliminate termites and other pests.

[0003] At present, the integrated pest management (IPM) strategy is widely used abroad to control termites. IPM is a comprehensive management strategy that uses a variety of necessary measures to control pests based on the relationship between pests and the environment. The IPM strategy has been widely used in the United States, mainly including communication with users, ant inspection, identification of termite species and degree of damage, application of control measures, effect evaluation and regular inspection. However, it consumes high technical costs, has high requirements for technology and personnel, is difficult to detect and evaluate, and the effect may be delayed. In addition, environmental conditions have a great impact on IPM.

[0004] The current methods for eliminating termites in China include comprehensive management such as ant surveys, manual nest digging, drilling holes and injecting medicine, trapping and killing, and tracing the source for elimination. However, there are problems such as incomplete elimination, inability to restore building stability, and easy recurrence of termite damage. Summary of the invention

[0005] The purpose of the present invention is to provide a magnetically controlled adhesive material and a preparation method and application thereof, so as to solve the problems of incomplete extermination, failure to restore building stability and easy recurrence of termite damage in existing termite extermination methods.

[0006] In a first aspect, the present invention provides a magnetron adhesive material, which comprises the following components, in parts by weight: 20-30 parts of polyurethane, 20-25 parts of magnetic powder, 5-10 parts of iron oxide, 5-10 parts of active calcium carbonate and 2.5-5 parts of insecticide.

[0007] In the magnetron adhesive material provided by the present invention, the polyurethane may be, for example, 20 parts, 22 parts, 24 parts, 26 parts, 28 parts, 30 parts or other values ​​within the range; the magnetic powder may be, for example, 20 parts, 21 parts, 22 parts, 23 parts, 24 parts, 25 parts or other values ​​within the range; the iron oxide may be, for example, 5 parts, 6 parts, 7 parts, 8 parts, 9 parts, 10 parts or other values ​​within the range; the activated calcium carbonate may be, for example, 5 parts, 6 parts, 7 parts, 8 parts, 9 parts, 10 parts or other values ​​within the range; the insecticide may be, for example, 2.5 parts, 3 parts, 3.5 parts, 4 parts, 4.5 parts, 5 parts or other values ​​within the range.

[0008] In the present invention, the inventors have found that the magnetron adhesive material is mainly composed of polyurethane, which is a polymer material with good air tightness and toughness. When the magnetron adhesive material is applied to an ancient building invaded by termites, the ancient building can be sealed, the entry and exit passages and pores of the termites are blocked, and the protein structure of the termites in the deep ant holes is destroyed, causing the termites to lose their original ability to move and suffocate to death. At the same time, the insecticide in the material can further kill the termites in the ancient building. The addition of magnetic powder makes the magnetron adhesive material have strong magnetism, and it can be applied to the surface of the ancient building under magnetic control conditions, and the operation is simple. In addition, the active calcium carbonate in the material can reduce the surface tension of the colloid, and enhance the bonding strength and molding strength, so that the structure of the ancient building can be restored to stability.

[0009] In some embodiments, the magnetron adhesive material includes the following components, measured in parts by weight: 20 parts of polyurethane, 20 parts of magnetic powder, 5 parts of iron oxide, 5 parts of active calcium carbonate, and 2.5 parts of insecticide.

[0010] In some embodiments, the following components are included, in parts by weight: 25 parts of polyurethane, 22.5 parts of magnetic powder, 7 parts of iron oxide, 6 parts of active calcium carbonate and 3.5 parts of insecticide.

[0011] In some embodiments, the following components are included, in parts by weight: 30 parts of polyurethane, 25 parts of magnetic powder, 10 parts of iron oxide, 7 parts of activated calcium carbonate and 4.5 parts of insecticide.

[0012] In some embodiments, the pesticide comprises a Chinese herbal extract; the Chinese herbal extract comprises one or more of a Forsythia suspensa extract, a Wolffia schrenkiana extract, a Thimbleweed vine extract, aconite extract, aconite extract, and realgar extract.

[0013] In the present invention, the inventors further studied and found that the use of Chinese herbal medicine extracts as insecticides has high insecticidal activity and is non-toxic and environmentally friendly.

[0014] In some embodiments, the Chinese herbal medicine extract comprises a Chinese herbal medicine aqueous extract.

[0015] It should be noted that the Chinese herbal medicine water extract is prepared by immersing the Chinese herbal medicine in water and then extracting it. The extraction method can be carried out using conventional methods according to actual needs. For example, supercritical iron dioxide can be used to extract Chinese herbal medicines at an extraction temperature of 75°C, an extraction pressure of 35MP, and an extraction time of 4h to obtain a Chinese herbal medicine water extract.

[0016] In some embodiments, the magnetic powder includes ferroferric oxide magnetic powder, and the particle size of the ferroferric oxide magnetic powder is 20-50 nm, for example, 20 nm, 25 nm, 30 nm, 35 nm, 40 nm, 45 nm, 50 nm or other values ​​within this range.

[0017] In the present invention, controlling the particle size of the magnetic powder within a specific range is beneficial to uniform mixing and dispersion of the magnetic powder in the magnetron adhesive material, thereby facilitating better magnetism control of the magnetron adhesive material.

[0018] In some embodiments, the particle size of the activated calcium carbonate is 1-3 μm, for example, 1 μm, 1.5 μm, 2 μm, 2.5 μm, 3 μm or other values ​​within this range.

[0019] In the present invention, the particle size of the active calcium carbonate is controlled within a specific range, which is conducive to uniform mixing and dispersion of the active calcium carbonate in the magnetron adhesive material, further increasing the bonding strength and molding strength, and restoring the stability of the structure of the ancient building.

[0020] In a second aspect, the present invention provides a method for preparing a magnetron adhesive material as described above, comprising the following steps: mixing polyurethane, ferroferric oxide magnetic powder, iron oxide, activated calcium carbonate and a Chinese herbal medicine aqueous extract, and obtaining a magnetron adhesive material after stirring and dispersing.

[0021] In the present invention, the raw materials used are cheap and easily available, and the entire preparation process is simple, has good economic benefits, a long effective period, and is environmentally friendly, and therefore is suitable for large-scale application.

[0022] In some embodiments, the step of storing the magnetron adhesive material in a sealed container is further included.

[0023] In a third aspect, the present invention provides the use of any of the above-mentioned magnetically controlled adhesive materials in killing pests that corrode ancient architectural relics.

[0024] In some embodiments, the pests include termites.

[0025] The beneficial effects of the present invention are as follows: different from the prior art, the present invention uses polyurethane as a main agent, and simultaneously adds magnetic powder, iron oxide, active calcium carbonate and insecticide to prepare a magnetically controlled adhesive material. The magnetically controlled adhesive material is applied to ancient buildings under magnetic control, which can accurately repair the ancient buildings and make the ancient buildings have higher corrosion resistance and strength; at the same time, under the action of insecticides, the repeated proliferation of pests such as termites can be inhibited. In addition, the active calcium carbonate in the material can reduce the surface tension of the colloid, and enhance the bonding strength and molding strength, so that the structure of the ancient building can be restored to stability. DETAILED DESCRIPTION

[0026] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] The experimental methods without specific conditions in the examples are usually carried out according to conventional conditions and conditions described in the manual, or according to conditions recommended by the manufacturer. The general equipment, materials, reagents, etc. used are all available from commercial channels unless otherwise specified.

[0028] In the present invention, the preparation method of Chinese herbal medicine water extract (water extract of Forsythia suspensa, water extract of Herba Lycopodii, water extract of Caulis Aconiti Lateralis, water extract of Aconitum kusnezoffii, water extract of Aconitum carmichaelii and water extract of Realgar) comprises: extracting Chinese herbal medicine by supercritical iron dioxide, with the extraction temperature of 75°C, the extraction pressure of 35MP and the extraction time of 4h to obtain the water extract of Chinese herbal medicine.

[0029] Example 1 A magnetron adhesive material comprises, by weight, 20 parts of polyurethane, 20 parts of ferroferric oxide magnetic powder, 5 parts of iron oxide, 5 parts of active calcium carbonate and 2.5 parts of Forsythia suspensa water extract.

[0030] The preparation method of the magnetron adhesive material comprises the following steps: Polyurethane, ferroferric oxide magnetic powder with a particle size of 50 nm, iron oxide, active calcium carbonate with a particle size of 3 μm and a water extract of Forsythia suspensa were mixed, stirred and dispersed to obtain a magnetic control adhesive material.

[0031] Example 2 A magnetron adhesive material comprises, by weight, 25 parts of polyurethane, 22.5 parts of ferroferric oxide magnetic powder, 7 parts of iron oxide, 6 parts of active calcium carbonate and 3.5 parts of larkspur schefflera water extract.

[0032] The preparation method of the magnetron adhesive material comprises the following steps: Polyurethane, ferroferric oxide magnetic powder with a particle size of 35 nm, iron oxide, active calcium carbonate with a particle size of 2 μm and water extract of jasmine were mixed, and after stirring and dispersing, a magnetic control adhesive material was obtained.

[0033] Example 3 A magnetron adhesive material comprises, by weight, 30 parts of polyurethane, 25 parts of ferroferric oxide magnetic powder, 10 parts of iron oxide, 7 parts of active calcium carbonate and 4.5 parts of aconite water extract.

[0034] The preparation method of the magnetron adhesive material comprises the following steps: Polyurethane, ferroferric oxide magnetic powder with a particle size of 20 nm, iron oxide, active calcium carbonate with a particle size of 1 μm and water extract of Aconitum kusnezoffii are mixed, and after stirring and dispersing, a magnetic control adhesive material is obtained.

[0035] Comparative Example 1 The magnetron adhesive material and the preparation method thereof in this comparative example are basically the same as those in Example 3, except that no active calcium carbonate is added to the magnetron adhesive material.

[0036] Comparative Example 2 The magnetron adhesive material and the preparation method thereof in this comparative example are basically the same as those in Example 3, except that no Aconitum kusnezoffii water extract is added to the magnetron adhesive material.

[0037] Performance Test 1 The tensile strength, tear strength, elongation at break, hardness and resilience of the magnetron adhesive materials prepared in Examples 1-3 and Comparative Example 1 were tested, and the results are shown in Table 1 below.

[0038] Table 1 Performance test results of magnetron adhesive materials

[0039] It can be seen from the results in Table 1 that the magnetron adhesive materials prepared in Examples 1-3 have good strength. In Comparative Example 1, no active calcium carbonate was added. It was found that the strength of the prepared active calcium carbonate decreased to a certain extent. The results show that adding active calcium carbonate to the magnetron adhesive material is beneficial to improving the bonding strength and molding strength of the material.

[0040] Performance Test 2 Termites cultured in a wooden structure (about 20*30 cm) were placed horizontally on a clean and uncontaminated operating table. Under the traction of the magnetic field force, the magnetic control adhesive materials prepared in Example 3 and Comparative Example 2 were introduced into the positions of the wooden structure that had been eaten by termites (the magnetic control adhesive materials in Example 3 were distributed at 10 different positions of the wooden structure, and the magnetic control adhesive materials in Comparative Example 2 were distributed at 3 different positions of the wooden structure). After 6 hours, the death of termites was checked and the termite mortality rate was counted. The results are shown in Table 2 below.

[0041] Table 2 Termite mortality results

[0042] It can be seen from the data in Table 2 that the magnetic control adhesive prepared in Example 3 has a good killing effect on termites. In Comparative Example 2, no water extract of Aconitum kusnezoffii was added. The results showed that the killing effect of the magnetic control adhesive on termites was significantly reduced. The results show that in the present invention, the killing effect of the magnetic control adhesive on termites can be significantly improved by adding the water extract of Aconitum kusnezoffii to the magnetic control adhesive.

[0043] In summary, in the present invention, the magnetic control adhesive material is applied to the ancient buildings under magnetic control, which can accurately repair the ancient buildings and make the ancient buildings have higher corrosion resistance and strength; at the same time, under the action of insecticides, the repeated proliferation of pests such as termites can be inhibited. In addition, the active calcium carbonate in the material can reduce the surface tension of the colloid, and enhance the bonding strength and molding strength, so that the structure of the ancient buildings can be restored to stability.

[0044] It should be noted that the above embodiments all belong to the same inventive concept, and the description of each embodiment has its own focus. For matters that are not described in detail in some embodiments, reference may be made to the description in other embodiments.

[0045] The above-mentioned embodiments only express the implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A magnetron adhesive material, characterized in that: The invention comprises the following components in parts by weight: 20-30 parts of polyurethane, 20-25 parts of magnetic powder, 5-10 parts of iron oxide, 5-10 parts of active calcium carbonate and 2.5-5 parts of insecticide.

2. The magnetron adhesive material according to claim 1, characterized in that: The invention comprises the following components in parts by weight: 20 parts of polyurethane, 20 parts of magnetic powder, 5 parts of iron oxide, 5 parts of active calcium carbonate and 2.5 parts of insecticide.

3. The magnetron adhesive material according to claim 1, characterized in that: The invention comprises the following components in parts by weight: 25 parts of polyurethane, 22.5 parts of magnetic powder, 7 parts of iron oxide, 6 parts of active calcium carbonate and 3.5 parts of insecticide.

4. The magnetron adhesive material according to claim 1, characterized in that: The invention comprises the following components in parts by weight: 30 parts of polyurethane, 25 parts of magnetic powder, 10 parts of iron oxide, 7 parts of active calcium carbonate and 4.5 parts of insecticide.

5. The magnetron adhesive material according to claim 1, characterized in that: The insecticide comprises a Chinese herbal medicine extract; the Chinese herbal medicine extract comprises one or more of a Forsythia suspensa extract, a Codonopsis pilosula extract, a Caulis thunbergii extract, aconite extract, aconite extract and realgar extract.

6. The magnetron adhesive material according to claim 5, characterized in that: The Chinese herbal medicine extract includes a Chinese herbal medicine water extract.

7. The magnetron adhesive material according to claim 1, characterized in that: The magnetic powder includes ferroferric oxide magnetic powder, and the particle size of the ferroferric oxide magnetic powder is 20-50 nm.

8. The magnetron adhesive material according to claim 1, characterized in that: The particle size of the activated calcium carbonate is 1-3 μm.

9. A method for preparing a magnetron adhesive material as claimed in any one of claims 1 to 8, characterized in that: The steps include: Polyurethane, ferroferric oxide magnetic powder, iron oxide, active calcium carbonate and Chinese herbal medicine water extract are mixed and stirred and dispersed to obtain a magnetic control adhesive material.

10. Use of the magnetically controlled adhesive material according to any one of claims 1 to 8 in killing pests that corrode ancient buildings and cultural relics.

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