Manufacturing method of bismuth ion functional graphene agricultural film

Abstract

The present invention provides a method for producing a bismuth ion functional graphene agricultural film. The method includes a mixing step of feeding an oil-based bismuth ion graphene material and colloidal particles into a mixer, stirring, and drying after stirring to obtain and prepare a mixed material; a granulation step of feeding the mixed material into an extruder, melting, kneading, extruding, cooling, cutting, and drying to obtain a functional master batch; and a film inflation step of feeding the functional master batch into an inflation film molding machine to perform film inflation to obtain a bismuth ion functional graphene agricultural film. If this is used as a roof film among agricultural films, it will have a better heat retention effect. In addition, if it is used as a ground film and a waterproof underground film, it will be possible to kill bacteria and harmful viruses on the ground. In addition, the action of bismuth ions can effectively suppress the infection of harmful fungi on the roots of plants, thereby preventing damage caused by insects underground.

Description

[Technical field]

[0001] The present invention relates to the technical field of film material production, and more particularly to a method for producing bismuth ion functional graphene agricultural film. [Background technology]

[0002] Following our method for producing bismuth ion-embedded graphene lattice, we decided to apply the functional graphene material with bismuth ions embedded in the graphene lattice to agricultural films.

[0003] In the present invention, the functional graphene embedded with bismuth ions is combined with agricultural plastic film to produce greenhouse insulation film, aboveground cultivation film, trench-type waterproof underground film, etc. That is, three types of application films, roof film, aboveground film, and underground film, are produced, but these are merely the same manufacturing method applied to three agricultural uses.

[0004] We noticed that greenhouse films are very widely used for thermal insulation purposes. General greenhouse films can provide the most economical thermal insulation effect for winter cultivation, and also enable the cultivation and breeding of agricultural products out of season in greenhouses, so they have a very wide range of uses. Therefore, we researched and developed the application of functional graphene to agricultural films by utilizing its properties.

[0005] Materials with bismuth ions embedded in graphene lattices have various advantages and economic value. We have used material films with silver ions embedded in graphene lattices, which are of course easy to use and can sterilize and protect against UV rays. However, due to the high manufacturing costs, they are not accepted by ordinary farmers, and only farmers who value cultivation and breeding have invested in them, but even they feel that the costs are somewhat high. Therefore, we need to improve them to streamline them and pursue the achievement of economic value.

[0006] When bismuth ions are bonded to graphene, the resulting film has excellent light transmission properties. In addition, bismuth ions have better infrared and heat retention properties than silver ions, so in terms of heat retention, they have better infrared and far-infrared retention properties than silver. This is also the purpose of this research and development. In addition, graphene supports the ions and plays a role in increasing the bismuth ions. In addition, tests have shown that the bactericidal power of bismuth ions is stronger than that of silver ions. In addition, bismuth ion graphene also has a photocatalytic effect, so it can exert its bactericidal power through photocatalysis even without direct contact with bacteria or viruses. Naturally, when it comes into direct contact with bacteria or viruses, its bactericidal power is stronger than that of silver.

[0007] Bismuth ions have many properties, are highly effective and applicable, and are also cost-effective materials. Bismuth ion graphene can not only retain infrared rays and keep warm, but also remove ultraviolet rays and block radiation. Bismuth ion graphene also has the advantage of being able to absorb X-rays and gamma rays, and can prevent light pollution, making it an excellent material for environmental protection and green applications.

[0008] First, bismuth-ion graphene has a much higher production cost advantage than silver-ion graphene. Therefore, it is expected that its application to greenhouse films will be very widespread in the future. In addition, the bismuth-ion graphene film can be used not only as a roof film to keep warm and protect from the rain, but also as an aboveground film or a waterproof underground film. In addition, it is possible to kill bacteria and harmful viruses above ground by contacting soil with the aboveground film using bismuth-ion graphene. In addition, the action of bismuth ions effectively suppresses the infection of harmful fungi in the roots of plants, so it is also applied to underground films to prevent damage caused by insects underground. Summary of the Invention [Problem to be solved by the invention]

[0009] In view of the deficiencies of the prior art, the present invention provides a method for producing a bismuth ion functional graphene agricultural film. [Means for solving the problem]

[0010] In order to achieve the above object, the present invention provides the following technical means.

[0011] The method for producing bismuth ion functional graphene agricultural film includes the following steps:

[0012] (1) Mixing: The oil-based bismuth ion graphene material and colloidal particles are put into a mixer and mixed, and then dried after mixing is completed to obtain and prepare a mixed material.

[0013] (2) Granulation: The mixed material obtained in step (1) is fed into an extruder, and the mixture is melted, kneaded, extruded, cooled, cut, and dried to obtain a functional masterbatch.

[0014] (3) Film inflation: The functional masterbatch obtained in step (2) is fed into a blown film forming machine to perform film inflation to obtain a bismuth ion functional graphene agricultural film.

[0015] Preferably, the colloidal particles in step (1) are any of PVC, EVA, PET, PO or PP.

[0016] Preferably, the mass ratio of the oil-based bismuth-ion graphene material to the colloid particles in the step (1) is 1:100-250.

[0017] Preferably, the stirring time in step (1) is 1 to 2 hours, and the stirring speed is 60 to 150 r / min.

[0018] Preferably, the drying temperature in step (1) is 60 to 70° C., and the drying time is 2 to 3 hours.

[0019] Preferably, in the preparation of the oil-based bismuth ion graphene material in step (1), 100 parts by weight of natural scaly graphite powder and 4 parts by weight of chelating bismuth ion solution are added into a reaction vessel, 776 parts by weight of DTPA are added as an osmotic pressure buffer, the pH is adjusted to 6, and the reaction gas pressure is set to 0.1 MPa and the reaction is carried out at 30°C for 8 hours. After the reaction is completed, 100 parts by weight of EDTA solution is added as a buffer, and the reaction is continued at 30°C for 4 hours. In this way, the oil-based bismuth ion graphene material is obtained after the reaction is completed.

[0020] Preferably, the natural flaky graphite powder has a particle size of 300 to 15,000 mesh, and the mass concentration of the chelating bismuth ions is 10,000 ppm.

[0021] Preferably, the buffer is an EDTA solution, with a concentration of 1 mol / L.

[0022] The present invention also protects the application of the method for producing the bismuth ion functional graphene agricultural film. The bismuth ion functional graphene agricultural film can be used in three types of application films: roof film, ground film and underground film. Effect of the Invention

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] (1) The present invention first provides the application of bismuth ion functional graphene material to agricultural films. In terms of infrared and heat retention, bismuth ions have better functions than silver ions, and therefore have better infrared and far-infrared retention effects than silver in terms of heat retention.

[0025] (2) The bactericidal power of bismuth ions is stronger than that of silver ions. In addition, since bismuth ion graphene also has a photocatalytic effect, it can exert its bactericidal power by photocatalysis even without direct contact with bacteria or viruses. In addition, bismuth ion graphene is not only capable of retaining infrared rays and keeping things warm, but also capable of removing ultraviolet rays and blocking radiation. Bismuth ion graphene also has the advantage of being able to absorb X-rays, gamma rays, etc.

[0026] (3) If the bismuth ion functional graphene material is applied to aboveground films and underground waterproof films, it will be possible to kill bacteria and harmful viruses aboveground when soil comes into contact with the aboveground film using bismuth ion graphene. In addition, the action of bismuth ions will effectively suppress the infection of harmful fungi in plant roots, thus preventing damage caused by insects underground. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0027] The technical means of the present invention will be described below in a clear and concise manner by combining specific embodiments. It should be noted that the described embodiments are only some of the embodiments of the present invention, and are not all of the embodiments. Furthermore, all other embodiments obtained by those skilled in the art based on the embodiments of the present invention without performing creative labor, all belong to the scope of protection of the present invention.

[0028] All the raw materials in the examples of the present invention are commercially available, among which the non-ionic chelating agents (EDTA, DTPA) and chelating bismuth ions are available from YiTian Group.

[0029] Example 1: The method for preparing a bismuth ion functional graphene agricultural film included the following steps:

[0030] (1) Preparation of oil-based bismuth ion graphene material: 100g of natural scaly graphite powder and 4g of 10,000ppm mass concentration chelating bismuth ion solution were added to a reaction vessel, 776g of 1mol / L DTPA was added as an osmotic pressure buffer, the pH was adjusted to 6, and the reaction gas pressure was set to 0.1MPa and the reaction was carried out at 30℃ for 8h. After the reaction was completed, 100g of 1mol / L EDTA solution was added as a buffer, and the reaction was continued at 30℃ for 4h. In this way, an oil-based bismuth ion graphene material was obtained after the reaction was completed.

[0031] (2) Mixing: 100g of oil-based bismuth ion graphene material and 10kg of PVC colloidal particles were put into a mixer and mixed at a speed of 60r / min for 1h. After mixing was completed, the mixture was dried at 60℃ for 3h to obtain and prepare the mixed material.

[0032] (3) Granulation: The mixed material obtained in step (2) was fed into a twin-screw extruder, and the materials were melted, kneaded, extruded, cooled, cut, and dried to obtain a functional masterbatch.

[0033] (4) Film inflation: The functional masterbatch obtained in step (3) was fed into a blown film forming machine to perform film inflation, and a bismuth ion functional graphene agricultural film was obtained.

[0034] Example 2: The method for preparing a bismuth ion functional graphene agricultural film included the following steps:

[0035] (1) Preparation of oil-based bismuth ion graphene material: 100g of natural scaly graphite powder and 4g of 10,000ppm mass concentration chelating bismuth ion solution were added to a reaction vessel, 776g of 1mol / L DTPA was added as an osmotic pressure buffer, the pH was adjusted to 6, and the reaction gas pressure was set to 0.1MPa and the reaction was carried out at 30℃ for 8h. After the reaction was completed, 100g of 1mol / L EDTA solution was added as a buffer, and the reaction was continued at 30℃ for 4h. In this way, an oil-based bismuth ion graphene material was obtained after the reaction was completed.

[0036] (2) Mixing: 100g of oil-based bismuth ion graphene material and 15kg of PET colloidal particles were put into a mixer and mixed at a speed of 60r / min for 1h. After mixing was completed, the mixed material was obtained and prepared by drying at 60℃ for 3h.

[0037] (3) Granulation: The mixed material obtained in step (2) was fed into a twin-screw extruder, and the materials were melted, kneaded, extruded, cooled, cut, and dried to obtain a functional masterbatch.

[0038] (4) Film inflation: The functional masterbatch obtained in step (3) was fed into a blown film forming machine to perform film inflation, and a bismuth ion functional graphene agricultural film was obtained.

[0039] Example 3: The method for preparing a bismuth ion functional graphene agricultural film included the following steps:

[0040] (1) Preparation of oil-based bismuth ion graphene material: 100g of natural scaly graphite powder and 4g of 10,000ppm mass concentration chelating bismuth ion solution were added to a reaction vessel, 776g of 1mol / L DTPA was added as an osmotic pressure buffer, the pH was adjusted to 6, and the reaction gas pressure was set to 0.1MPa and the reaction was carried out at 30℃ for 8h. After the reaction was completed, 100g of 1mol / L EDTA solution was added as a buffer, and the reaction was continued at 30℃ for 4h. In this way, an oil-based bismuth ion graphene material was obtained after the reaction was completed.

[0041] (2) Mixing: 100g of oil-based bismuth ion graphene material and 10kg of PP colloidal particles were put into a mixer and mixed at a speed of 60r / min for 1.5h. After mixing was completed, the mixed material was obtained and prepared by drying at 60℃ for 3h.

[0042] (3) Granulation: The mixed material obtained in step (2) was fed into a twin-screw extruder, and the materials were melted, kneaded, extruded, cooled, cut, and dried to obtain a functional masterbatch.

[0043] (4) Film inflation: The functional masterbatch obtained in step (3) was fed into a blown film forming machine to perform film inflation, and a bismuth ion functional graphene agricultural film was obtained.

[0044] Example 4: The method for preparing a bismuth ion functional graphene agricultural film included the following steps:

[0045] (1) Preparation of oil-based bismuth ion graphene material: 100g of natural scaly graphite powder and 4g of 10,000ppm mass concentration chelating bismuth ion solution were added to a reaction vessel, 776g of 1mol / L DTPA was added as an osmotic pressure buffer, the pH was adjusted to 6, and the reaction gas pressure was set to 0.1MPa and the reaction was carried out at 30℃ for 8h. After the reaction was completed, 100g of 1mol / L EDTA solution was added as a buffer, and the reaction was continued at 30℃ for 4h. In this way, an oil-based bismuth ion graphene material was obtained after the reaction was completed.

[0046] (2) Mixing: 100g of oil-based bismuth ion graphene material and 15kg of PP colloidal particles were put into a mixer and mixed at a speed of 100r / min for 2h. After mixing was completed, the mixture was dried at 70℃ for 3h to obtain and prepare the mixed material.

[0047] (3) Granulation: The mixed material obtained in step (2) was fed into a twin-screw extruder, and the materials were melted, kneaded, extruded, cooled, cut, and dried to obtain a functional masterbatch.

[0048] (4) Film inflation: The functional masterbatch obtained in step (3) was fed into a blown film forming machine to perform film inflation, and a bismuth ion functional graphene agricultural film was obtained.

[0049] Example 5: The method for preparing a bismuth ion functional graphene agricultural film included the following steps:

[0050] (1) Preparation of oil-based bismuth ion graphene material: 100g of natural scaly graphite powder and 4g of 10,000ppm mass concentration chelating bismuth ion solution were added to a reaction vessel, 776g of 1mol / L DTPA was added as an osmotic pressure buffer, the pH was adjusted to 6, and the reaction gas pressure was set to 0.1MPa and the reaction was carried out at 30℃ for 8h. After the reaction was completed, 100g of 1mol / L EDTA solution was added as a buffer, and the reaction was continued at 30℃ for 4h. In this way, an oil-based bismuth ion graphene material was obtained after the reaction was completed.

[0051] (2) Mixing: 100g of oil-based bismuth ion graphene material and 10kg of EVA colloid particles were put into a mixer and mixed at a speed of 60r / min for 1h. After mixing was completed, the mixture was dried at 60℃ for 2h to obtain and prepare the mixed material.

[0052] (3) Granulation: The mixed material obtained in step (2) was fed into a twin-screw extruder, and the materials were melted, kneaded, extruded, cooled, cut, and dried to obtain a functional masterbatch.

[0053] (4) Film inflation: The functional masterbatch obtained in step (3) was fed into a blown film forming machine to perform film inflation, and a bismuth ion functional graphene agricultural film was obtained.

[0054] The bismuth ion functional graphene agricultural films obtained in Examples 1 to 5 above were applied to agricultural roof films, and the light transmission performance was tested. The results are shown in Table 1.

[0055] [Table 1]

[0056] The bismuth ion functional graphene agricultural films obtained in Examples 1 to 5 above were applied to agricultural ground films to test their antibacterial performance. The test standard was ASTM E2315-2016, and the deposit numbers of the test Escherichia coli were ATCC8739 and Staphylococcus aureus were ATCC6538. The results are shown in Table 2.

[0057] [Table 2]

[0058] Although embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. Accordingly, the scope of the present invention is limited by the appended claims and equivalents thereof.

Claims

1. A method for producing a bismuth ion functional graphene agricultural film, comprising: (1) Mixing: Putting the oil-based bismuth ion graphene material and colloidal particles into a mixer and mixing, and drying after mixing is completed to obtain and prepare a mixed material; (2) Granulation: The mixed material obtained in step (1) is put into an extruder, and is melted, kneaded, extruded, cooled, cut, and dried to obtain a functional master batch; (3) Film inflation: The method includes the steps of: feeding the functional masterbatch obtained in step (2) into a blown film forming machine to perform film inflation to obtain a bismuth ion functional graphene agricultural film.

2. The method for producing a bismuth ion functional graphene agricultural film according to claim 1, characterized in that the colloidal particles in step (1) are any of PVC, EVA, PET, PO or PP.

3. The method for producing a bismuth ion functional graphene agricultural film according to claim 1, wherein the mass ratio of the oil-based bismuth ion graphene material to the colloidal particles in step (1) is 1:100-250.

4. The method for producing a bismuth ion functional graphene agricultural film according to claim 1, characterized in that the stirring time in step (1) is 1-2h, and the stirring speed is 60-150r / min.

5. The method for producing a bismuth ion functional graphene agricultural film according to claim 1, characterized in that the drying temperature in step (1) is 60-70°C, and the drying time is 2-3h.

6. The method for preparing the oil-based bismuth ion graphene material in step (1) is as follows: 100 parts by weight of natural flaky graphite powder and 4 parts by weight of chelating bismuth ion solution are added into a reaction vessel, 776 parts by weight of DTPA are added to adjust the pH to 6, and the reaction gas pressure is 0.1 MPa and the reaction is carried out at 30°C for 8 hours; after the reaction is completed, 100 parts by weight of a buffer agent are added, and the reaction is continued at 30°C for 4 hours, so as to obtain the oil-based bismuth ion graphene material after the reaction is completed.

7. The method for producing a bismuth ion functional graphene agricultural film according to claim 6, characterized in that the particle size of the natural flaky graphite powder is 300 to 15,000 mesh, and the mass concentration of the chelating bismuth ion solution is 10,000 ppm.

8. The method for producing a bismuth ion functional graphene agricultural film according to claim 6, wherein the buffer is an EDTA solution and has a concentration of 1 mol / L.

9. An application of the method for producing a bismuth ion functional graphene agricultural film according to any one of claims 1 to 8, The bismuth ion functional graphene agricultural film can be used in three types of application films: roof film, ground film and underground film.

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