A pbt composite material and a method for preparing a pbt composite material

Abstract

The application discloses a PBT composite material and a preparation method of the PBT composite material, and the composite material comprises PBT 80-100 parts and adsorption auxiliary agent 10-16 parts; wherein the adsorption auxiliary agent comprises at least one of a wollastonite compound and an acrylamide polymer. Through the above mode, the PBT composite material can adsorb VOC small molecule substances.

Description

Technical Field

[0001] This application relates to the field of materials technology, and in particular to a PBT composite material and a method for preparing the PBT composite material. Background Technology

[0002] PBT material possesses good fatigue resistance, decent heat resistance, and excellent dimensional stability, leading to its increasing applications in connectors, interior components, and more. As domestic consumers place higher demands on automotive safety and health, OEMs are setting requirements for the VOC performance of PBT materials. Summary of the Invention

[0003] The main technical problem addressed by this application is to provide a PBT composite material and a method for preparing the PBT composite material, which enables the PBT composite material to adsorb VOC small molecules.

[0004] To solve the above-mentioned technical problems, one technical solution adopted in this application is to provide a PBT composite material, which includes 80-100 parts of PBT and 10-16 parts of adsorption aid; wherein the adsorption aid includes at least one of wollastonite composite and acrylamide polymer.

[0005] The acrylamide polymer includes a cross-linked polyacrylamide chain structure; or, the acrylamide polymer includes a polyacrylamide chain structure and sodium alginate bonded to the polyacrylamide chain.

[0006] The adsorption aids include composite materials formed by wollastonite complex and acrylamide polymer.

[0007] The wollastonite complex includes gallic acid-coated wollastonite.

[0008] The PBT composite material includes 80-100 parts of PBT, 10-16 parts of adsorption aid, and 16-22 parts of flame retardant; the flame retardant includes one or more of aluminum hydroxide, tannic acid-modified aluminum hydroxide, and cobalt chloride.

[0009] The PBT composite material includes 80-100 parts of PBT, 10-16 parts of adsorption aid, 16-22 parts of flame retardant, and 0.1-0.5 parts of antioxidant.

[0010] To solve the above-mentioned technical problems, another technical solution adopted in this application is: to provide a method for preparing PBT composite material, the method comprising: providing 80-100 parts of PBT and 10-16 parts of adsorption aid; wherein the adsorption aid includes at least one of wollastonite composite and acrylamide polymer; mixing 80-100 parts of PBT and 10-16 parts of adsorption aid to obtain a mixture; and extruding the mixture to obtain PBT composite material.

[0011] The adsorption aid, comprising 10-16 parts by weight, includes: 20-24 parts acrylamide, 40-50 parts gallic acid-coated wollastonite, 0.2-0.4 parts crosslinking agent, 0.3-0.5 parts initiator, 100-120 parts water, and 16-20 parts sodium alginate; the mixture of gallic acid-coated wollastonite, acrylamide, crosslinking agent, initiator, water, and sodium alginate is reacted in a water bath at 70-90°C for 16-20 hours to obtain a first reaction solution; the first reaction solution is filtered, washed, and dried to obtain the adsorption aid.

[0012] The method includes providing 40-50 parts of gallic acid-coated wollastonite, comprising: 60-70 parts by weight of buffer solution, 30-40 parts of wollastonite, 20-24 parts by weight of gallic acid, and 70-90 parts by weight of water; reacting the mixture of wollastonite, gallic acid, water, and buffer solution in a water bath at 70-90°C for 12-16 hours to obtain a second reaction solution; and filtering, washing, and drying the second reaction solution to obtain gallic acid-coated wollastonite.

[0013] The preparation method of PBT composite material further includes: providing 80-100 parts of PBT, 10-16 parts of adsorption aid, and 16-22 parts of flame retardant; wherein the flame retardant includes one or more of aluminum hydroxide, tannic acid-modified aluminum hydroxide, and cobalt chloride; and mixing 80-100 parts of PBT, 10-16 parts of adsorption aid, and 16-22 parts of flame retardant to obtain a mixture.

[0014] The flame retardant includes aluminum hydroxide, aluminum hydroxide modified with tannic acid, and cobalt chloride; 16-22 parts of flame retardant are provided, including: 40-50 parts by weight of tannic acid, 20-24 parts by weight of cobalt chloride, 80-120 parts by weight of water, and 30-40 parts by weight of aluminum hydroxide; the mixture of tannic acid, cobalt chloride, water, and aluminum hydroxide is reacted in a water bath at 40-60°C for 16-20 hours to obtain a third reaction solution; the third reaction solution is filtered, washed, and dried to obtain the flame retardant.

[0015] The preparation method of PBT composite material further includes: providing 80-100 parts of PBT, 10-16 parts of adsorption aid, 16-22 parts of flame retardant and 0.1-0.5 parts of antioxidant; mixing 80-100 parts of PBT, 10-16 parts of adsorption aid, 16-22 parts of flame retardant and 0.1-0.5 parts of antioxidant to obtain a mixture.

[0016] In the above technical solution, in addition to the main PBT material, an adsorption aid is added to the PBT composite material. When the adsorption aid comes into contact with VOC small molecules, it adsorbs the VOC small molecules. That is, the addition of the adsorption aid enables the PBT composite material to adsorb VOC small molecules, thus improving the VOC performance of the PBT composite material. In addition, PBT material itself has good fatigue resistance, good heat resistance, and excellent dimensional stability. Therefore, the PBT composite material provided in this application has the adsorption performance of VOC small molecules while possessing fatigue resistance, heat resistance, and dimensional stability. Attached Figure Description

[0017] Figure 1 This is a schematic flowchart of an embodiment of the method for preparing PBT composite material provided in this application;

[0018] Figure 2 yes Figure 1 The flowchart of step S11 shown is a schematic diagram of one embodiment.

[0019] Figure 3 yes Figure 2 The flowchart of step S21 shown is a schematic diagram of one embodiment;

[0020] Figure 4 This is a schematic flowchart of another embodiment of the method for preparing PBT composite material provided in this application;

[0021] Figure 5 yes Figure 4 The flowchart of step S41 shown is a schematic diagram of an embodiment.

[0022] Figure 6 This is a schematic flowchart of another embodiment of the preparation method of PBT composite material provided in this application. Detailed Implementation

[0023] The embodiments of this application will now be described in detail with reference to the accompanying drawings.

[0024] In the following description, specific details such as particular system architectures, interfaces, and technologies are presented for illustrative purposes rather than for limiting purposes, in order to provide a thorough understanding of this application.

[0025] In this document, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " generally indicates that the preceding and following related objects have an "or" relationship. Furthermore, "many" in this document means two or more. Moreover, the term "at least one" in this document means any combination of at least two of any one or more of a plurality of objects. For example, including at least one of A, B, and C can mean including any one or more elements selected from the set consisting of A, B, and C.

[0026] This application provides a PBT composite material that can be used in at least the automotive, electronics, and industrial machinery fields. Taking the application of PBT composite material in the automotive field as an example, with the popularization of lightweight automobiles, engineering plastics are increasingly used in automobiles, mainly for ignition coils, motor housings, connectors, headlights, charging guns for new energy vehicles, windshield wipers, rearview mirrors, door handles, etc.

[0027] The PBT composite material provided in this application comprises 80-100 parts of PBT and 10-16 parts of an adsorption aid; wherein the adsorption aid includes at least one of wollastonite composite and acrylamide polymer. In addition to the main PBT material, the adsorption aid is added to this PBT composite material. When the adsorption aid comes into contact with VOC small molecules, it adsorbs the VOC small molecules. That is, the addition of the adsorption aid enables the PBT composite material to adsorb VOC small molecules, thus improving the VOC performance of the PBT composite material. Furthermore, PBT material itself has good fatigue resistance, good heat resistance, and excellent dimensional stability. Therefore, the PBT composite material provided in this application possesses fatigue resistance, heat resistance, and dimensional stability, while also exhibiting adsorption performance for VOC small molecules.

[0028] The amount of PBT added is 80-100 parts; for example, 80 parts, 85 parts, 90 parts, 95 parts, 100 parts, etc. The amount of adsorption aid added is 10-16 parts; for example, 10 parts, 13 parts, 14 parts, 16 parts, etc.

[0029] In one embodiment, the adsorption aid is a composite material formed by a wollastonite complex and an acrylamide polymer. When this composite material comes into contact with VOC small molecules, both the wollastonite complex and the acrylamide polymer have adsorption effects on the VOC small molecules. Therefore, using the composite material as an adsorption aid can give the PBT composite material better VOC performance. Of course, in other embodiments, the adsorption aid can also be either a wollastonite complex or an acrylamide polymer.

[0030] In one specific embodiment, the wollastonite composite includes gallic acid-coated wollastonite, which is capable of adsorbing small VOC molecules.

[0031] In one specific embodiment, the acrylamide polymer includes a cross-linked polyacrylamide chain structure. This cross-linked acrylamide chain structure can be considered a network structure, where inter-chain mechanical entanglement and hydrogen bonds together form network nodes. The hydrogel functional groups in the network structure can bind to VOC small molecules to adsorb them. In other specific embodiments, the acrylamide polymer includes a polyacrylamide chain structure and sodium alginate bonded to the polyacrylamide chain. The polyacrylamide chain structure and the bonded sodium alginate form an interpenetrating network structure. The hydrogel functional groups in the interpenetrating network structure can bind to VOC small molecules to achieve VOC adsorption.

[0032] For example, consider a composite material formed by a wollastonite complex and an acrylamide polymer as the adsorption aid. The wollastonite complex includes gallic acid-coated wollastonite, and the acrylamide polymer includes a polyacrylamide chain structure and sodium alginate bonded to the polyacrylamide chain. When this composite material is used as the adsorption aid and comes into contact with VOC small molecules, a large number of VOC small molecules diffuse into the hydrogel network structure formed by the polyacrylamide chain structure and the sodium alginate bonded to the polyacrylamide chain, and combine with the hydrogel functional groups (e.g., -OH groups) in the hydrogel network structure, thereby achieving the adsorption of a large number of VOC small molecules. Additionally, some VOC small molecules are adsorbed onto the gallic acid-coated wollastonite. Therefore, gallic acid-coated wollastonite and polyacrylamide polymers (polyacrylamide chain structure and sodium alginate bonded to the polyacrylamide chain) can both adsorb small VOC molecules, resulting in PBT composite materials containing this adsorption aid having better VOC performance.

[0033] To simultaneously impart flame-retardant properties to the PBT composite material, in one embodiment, the PBT composite material comprises 80-100 parts of PBT, 10-16 parts of an adsorption aid, and 16-22 parts of a flame retardant. In addition to the main PBT material, this PBT composite material also contains an adsorption aid and a flame retardant. When the adsorption aid comes into contact with VOC small molecules, it adsorbs the VOC small molecules. That is, the addition of the adsorption aid enables the PBT composite material to adsorb VOC small molecules, thus improving its VOC performance. Furthermore, the addition of the flame retardant enhances the flame-retardant properties of the PBT composite material. Additionally, PBT material itself possesses good fatigue resistance, good heat resistance, and excellent dimensional stability. Therefore, the PBT composite material provided in this application possesses fatigue resistance, heat resistance, and dimensional stability, while also exhibiting VOC small molecule adsorption and flame-retardant properties.

[0034] The flame retardants include one or more of aluminum hydroxide, tannic acid-modified aluminum hydroxide, and cobalt chloride. Aluminum hydroxide possesses certain smoke-suppressing properties; the aluminum oxide produced after its thermal decomposition can inhibit smoke release, thereby improving the flame retardant properties of PBT composites. After tannic acid modification, the surface polarity and agglomeration degree of aluminum hydroxide powder are reduced, and the compatibility between aluminum hydroxide powder and PBT material is better, thus improving the dispersibility of aluminum hydroxide in PBT material, which is also beneficial to improving the flame retardant properties of PBT composites. The addition of cobalt chloride makes the PBT composite material more resistant to smoke during combustion. 2+ The catalytic carbonization process makes it easier to generate a protective carbon layer with high strength and good density, which makes the carbon layer more stable and can effectively block oxygen and heat from entering the interior of PBT composite materials, thereby improving the flame retardant properties of PBT composite materials.

[0035] The amount of flame retardant added is 16-22 parts; for example, 16 parts, 19 parts, 21 parts, 22 parts, etc.

[0036] To prevent the PBT composite material from being oxidized by oxygen, in one embodiment, the PBT composite material includes 80-100 parts of PBT, 10-16 parts of adsorption aid, 16-22 parts of flame retardant, and 0.1-0.5 parts of antioxidant. In addition to the main PBT material, this PBT composite material also contains adsorption aid, flame retardant, and antioxidant. When the adsorption aid comes into contact with VOC small molecules, it adsorbs the VOC small molecules. That is, the addition of the adsorption aid gives the PBT composite material the ability to adsorb VOC small molecules, improving the VOC performance of the PBT composite material. Furthermore, the addition of the flame retardant improves the flame retardant performance of the PBT composite material. Additionally, the addition of the antioxidant first binds to oxygen, reacting chemically with oxygen to prevent oxygen from directly reacting with and oxidizing the PBT composite material. Moreover, PBT material itself has good fatigue resistance, good heat resistance, and excellent dimensional stability. Therefore, the PBT composite material provided in this application not only has fatigue resistance, heat resistance and dimensional stability, but also has adsorption properties for VOC small molecules, flame retardant properties and antioxidant properties.

[0037] The amount of antioxidant added is 0.1-0.5 parts; for example, 0.1 parts, 0.2 parts, 0.3 parts, 0.5 parts, etc.

[0038] In one specific embodiment, the antioxidant is one or a mixture of tris(2,4-di-tert-butyl)phosphite (abbreviated as Irganox168), pentaerythritol tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate] (abbreviated as Irganox1010), and 1,3,5-trimethyl-2,4,6-(3,5-di-tert-butyl-4-hydroxyphenylmethyl)benzene (abbreviated as Irganox1330).

[0039] Unlike existing technologies, this application provides a PBT composite material in which, in addition to the main PBT material, an adsorption aid is added. When the adsorption aid comes into contact with VOC small molecules, it adsorbs the VOC small molecules. In other words, the addition of the adsorption aid enables the PBT composite material to adsorb VOC small molecules, thus improving its VOC performance. Furthermore, PBT material itself possesses good fatigue resistance, good heat resistance, and excellent dimensional stability. Therefore, the PBT composite material provided in this application, while exhibiting fatigue resistance, heat resistance, and dimensional stability, also possesses the ability to adsorb VOC small molecules.

[0040] To obtain the above-mentioned PBT composite material, this application also provides a method for preparing the PBT composite material, for details please refer to [link to method]. Figure 1 , Figure 1This is a schematic flowchart of an embodiment of the PBT composite material preparation method provided in this application. In this embodiment, the PBT composite material preparation method includes the following steps:

[0041] Step S11: Provide 80-100 parts of PBT and 10-16 parts of adsorption aid.

[0042] In this embodiment, 80-100 parts of PBT and 10-16 parts of adsorption aid are provided. The number of parts of PBT and adsorption aid is not limited and can be set according to actual usage needs. For example, 100 parts of PBT and 16 parts of adsorption aid.

[0043] The adsorption aid includes at least one of wollastonite composite and acrylamide polymer.

[0044] In one embodiment, the adsorption aid is a composite material formed by a wollastonite complex and an acrylamide polymer. When this composite material is used as an adsorption aid and comes into contact with VOC small molecules, both the wollastonite complex and the acrylamide polymer have adsorption effects on the VOC small molecules. Therefore, when the composite material is used as an adsorption aid, the resulting PBT composite material has better VOC performance. Of course, in other embodiments, the adsorption aid can also be either a wollastonite complex or an acrylamide polymer.

[0045] In one specific embodiment, the acrylamide polymer includes a polyacrylamide chain structure and sodium alginate bonded to the polyacrylamide chain. The polyacrylamide chain structure and the bonded sodium alginate form an interpenetrating network structure. The hydrogel functional groups in the interpenetrating network structure can bind to VOC small molecules to achieve adsorption of VOC small molecules. Of course, in other specific embodiments, the acrylamide polymer may also include only a cross-linked polyacrylamide chain structure.

[0046] In one specific embodiment, the wollastonite composite includes gallic acid-coated wollastonite, which is capable of adsorbing small VOC molecules.

[0047] Step S12: Mix 80-100 parts of PBT and 10-16 parts of adsorption aid to obtain a mixture.

[0048] In this embodiment, 80-100 parts of PBT and 10-16 parts of adsorption aid are mixed to obtain a mixture. Specifically, 80-100 parts of PBT and 10-16 parts of adsorption aid are mixed and stirred evenly to obtain a mixture.

[0049] Step S13: Extrude the mixture to obtain the PBT composite material.

[0050] In this embodiment, the mixture is extruded to obtain a PBT composite material. Since the PBT composite material includes an adsorption aid, and this adsorption aid adsorbs VOC molecules upon contact with them, thus possessing the ability to adsorb VOC molecules, the PBT composite material with the added adsorption aid exhibits the ability to adsorb VOC molecules.

[0051] In one embodiment, the mixture is extruded using an extruder to obtain a PBT composite material. Specifically, the mixture is fed into the hopper of a twin-screw extruder for extrusion granulation to obtain the PBT composite material; wherein the twin-screw extruder includes six temperature zones arranged sequentially, with zone 1 at 200-220°C, zone 2 at 240-260°C, zone 3 at 240-260°C, zone 4 at 240-260°C, zone 5 at 240-260°C, zone 6 at 240-260°C, a die head temperature of 240-260°C, and a screw speed of 200-280 r / min.

[0052] Please see Figure 2 , Figure 2 yes Figure 1 The flowchart shown is a schematic diagram of one embodiment of step S11. It should be noted that if substantially the same result is achieved, this embodiment does not necessarily follow the same pattern. Figure 2 The illustrated process sequence is limited. For example... Figure 2 As shown, in this embodiment, the adsorption aid is a composite material formed by wollastonite complex and acrylamide polymer. The preparation of the adsorption aid specifically includes:

[0053] Step S21: By weight, provide 20-24 parts acrylamide, 40-50 parts gallic acid-coated wollastonite, 0.2-0.4 parts crosslinking agent, 0.3-0.5 parts initiator, 100-120 parts water and 16-20 parts sodium alginate.

[0054] In this embodiment, by weight, 20-24 parts of acrylamide (AM), 40-50 parts of gallic acid-coated wollastonite (GA@wollastonite), 0.2-0.4 parts of crosslinking agent, 0.3-0.5 parts of initiator, 100-120 parts of water, and 16-20 parts of sodium alginate (SA) are provided. The proportions of acrylamide, gallic acid-coated wollastonite, crosslinking agent, initiator, water, and sodium alginate are not limited and can be specifically set according to actual usage requirements.

[0055] In one embodiment, the crosslinking agent is N,N'-methylenebisacrylamide, the initiator is sodium persulfate, and the water is deionized water.

[0056] Step S22: Place the mixture of gallic acid-coated wollastonite, acrylamide, crosslinking agent, initiator, water and sodium alginate in a water bath at 70-90℃ and react for 16-20 hours to obtain the first reaction solution.

[0057] In this embodiment, a mixture of gallic acid-coated wollastonite, acrylamide, crosslinking agent, initiator, water, and sodium alginate is reacted in a water bath at 70-90°C for 16-20 hours to obtain a first reaction solution. The water bath temperature and reaction time are not limited and can be set according to actual needs; for example, a water bath temperature of 70°C and a reaction time of 16 hours.

[0058] In one embodiment, the crosslinking agent is N,N'-methylenebisacrylamide, the initiator is sodium persulfate, and the water is deionized water. Specifically, during the reaction in the water bath, sodium persulfate acts as an initiator, initiating the crosslinking of acrylamide and N,N'-methylenebisacrylamide to form polyacrylamide chains; sodium alginate crosslinks with the polyacrylamide chains to obtain a polyacrylamide chain structure and sodium alginate bonded to the polyacrylamide chains, forming an interpenetrating network structure; gallic acid-coated wollastonite crosslinks with sodium alginate through hydrogen bonds, thereby obtaining the first reaction solution.

[0059] Step S23: Filter, wash and dry the first reaction solution to obtain the adsorption aid.

[0060] In this embodiment, the first reaction solution is filtered, washed, and dried to obtain the adsorption aid. In other words, the first reaction solution is filtered, washed, and dried to obtain a stable adsorption aid.

[0061] In one embodiment, the crosslinking agent is N,N'-methylenebisacrylamide, the initiator is sodium persulfate, and the water is deionized water. In this case, filtering, washing, and drying the first reaction solution yields a stable PAM / SA / GA@wollastonite solid.

[0062] Please see Figure 3 , Figure 3 yes Figure 2 The diagram shows a flowchart of one embodiment of step S21. It should be noted that if substantially the same result is achieved, this embodiment does not necessarily follow the same pattern. Figure 3 The illustrated process sequence is limited. For example... Figure 3 As shown, in this embodiment, the wollastonite composite is gallic acid-coated wollastonite, and the preparation of gallic acid-coated wollastonite specifically includes:

[0063] Step S31: Provide 60-70 parts by weight of buffer solution, 30-40 parts by weight of wollastonite, 20-24 parts by weight of gallic acid and 70-90 parts by weight of water.

[0064] In this embodiment, 60-70 parts by weight of buffer solution, 30-40 parts by weight of wollastonite, 20-24 parts by weight of gallic acid, and 70-90 parts by weight of water are provided. The proportions of buffer solution, wollastonite, gallic acid, and water are not limited and can be set according to actual usage requirements.

[0065] In one embodiment, the buffer solution is a Tris-HCl buffer solution. The specific preparation steps are as follows: weigh a certain amount of Tris solution and HCl solution into a reaction vessel; stir at room temperature for 6-8 hours to prepare the Tris-HCl buffer solution. Of course, in other embodiments, the buffer solution can also be other types of buffer solutions, and this is not specifically limited here.

[0066] In one specific embodiment, the mass ratio of Tris solution to HCl solution is (30-40):(40-60).

[0067] Step S32: Place the mixture of wollastonite, gallic acid, water and buffer solution in a water bath at 70-90°C and react for 12-16 hours to obtain the second reaction solution.

[0068] In this embodiment, a mixture of wollastonite, gallic acid, water, and buffer solution is reacted in a water bath at 70-90°C for 12-16 hours to obtain a second reaction solution. The water bath temperature and reaction time are not limited and can be set according to actual usage requirements; for example, a water bath temperature of 70°C and a reaction time of 16 hours.

[0069] Step S33: The second reaction solution is filtered, washed and dried to obtain gallic acid-coated wollastonite.

[0070] In this embodiment, the second reaction solution is filtered, washed and dried to obtain gallic acid-coated wollastonite solid.

[0071] In one implementation, such as Figure 4 As shown, Figure 4 This is a schematic flowchart of another embodiment of the preparation method of PBT composite material provided in this application. The PBT composite material has both flame retardant properties and adsorption properties for VOC small molecules. The preparation of the PBT composite material specifically includes the following steps:

[0072] Step S41: Provide 80-100 parts PBT, 10-16 parts adsorption aid, and 16-22 parts flame retardant.

[0073] In this embodiment, 80-100 parts of PBT, 10-16 parts of adsorption aid, and 16-22 parts of flame retardant are provided. The quantities of PBT, adsorption aid, and flame retardant are not limited and can be set according to actual usage needs. For example, 100 parts of PBT, 16 parts of adsorption aid, and 16 parts of flame retardant.

[0074] The flame retardants include one or more of aluminum hydroxide (ATH), aluminum hydroxide modified with tannic acid (TA), and cobalt chloride.

[0075] In one embodiment, the flame retardant includes aluminum hydroxide, tannic acid-modified aluminum hydroxide, and cobalt chloride; specifically, the flame retardant is an ATH@Co-TA type flame retardant. Aluminum hydroxide possesses certain smoke-suppressing properties; the aluminum oxide generated after its thermal decomposition can suppress smoke release, thereby improving the flame retardant properties of the PBT composite material. After tannic acid modification, the surface polarity and agglomeration degree of the aluminum hydroxide powder are reduced, and the compatibility between the aluminum hydroxide powder and the PBT material is better, thus improving the dispersibility of aluminum hydroxide in the PBT material, which is also beneficial to improving the flame retardant properties of the PBT composite material. The addition of cobalt chloride makes the PBT composite material more resistant to smoke during combustion. 2+ The catalytic carbonization process makes it easier to generate a protective carbon layer with high strength and good density, which makes the carbon layer more stable and can effectively block oxygen and heat from entering the interior of PBT composite materials, thereby improving the flame retardant properties of PBT composite materials.

[0076] Step S42: Mix 80-100 parts of PBT, 10-16 parts of adsorption aid and 16-22 parts of flame retardant to obtain a mixture.

[0077] In this embodiment, 80-100 parts of PBT, 10-16 parts of adsorption aid, and 16-22 parts of flame retardant are mixed to obtain a mixture. Specifically, 80-100 parts of PBT, 10-16 parts of adsorption aid, and 16-22 parts of flame retardant are mixed and stirred evenly to obtain a mixture.

[0078] Step S43: Extrude the mixture to obtain the PBT composite material.

[0079] In this embodiment, the mixture is extruded to obtain a PBT composite material. Since the PBT composite material includes an adsorbent and a flame retardant, and the adsorbent adsorbs VOC molecules upon contact with them, thus possessing the ability to adsorb VOC molecules, and the flame retardant possesses flame-retardant properties, the PBT composite material with added adsorbent and flame retardant exhibits both VOC adsorption and flame-retardant properties.

[0080] Please see Figure 5 , Figure 5 yes Figure 4 The diagram shows a flowchart of one embodiment of step S41. It should be noted that if substantially the same result is achieved, this embodiment does not necessarily follow the same pattern. Figure 5 The illustrated process sequence is limited. For example... Figure 5 As shown, in this embodiment, the flame retardant includes aluminum hydroxide, tannic acid-modified aluminum hydroxide, and cobalt chloride. The preparation of the flame retardant specifically includes:

[0081] Step S51: Provide 40-50 parts by weight of tannic acid, 20-24 parts by weight of cobalt chloride, 80-120 parts by weight of water and 30-40 parts by weight of aluminum hydroxide.

[0082] In this embodiment, by weight, 40-50 parts of tannic acid, 20-24 parts of cobalt chloride, 80-120 parts of water, and 30-40 parts of aluminum hydroxide are provided. The proportions of tannic acid, cobalt chloride, crosslinking agent, initiator, water, and aluminum hydroxide are not limited and can be specifically set according to actual usage requirements.

[0083] In one embodiment, the water is deionized water.

[0084] Step S52: Place a mixture of tannic acid, cobalt chloride, water and aluminum hydroxide in a water bath at 40-60°C and react for 16-20 hours to obtain the third reaction solution.

[0085] In this embodiment, a mixture of tannic acid, cobalt chloride, water, and aluminum hydroxide is reacted in a water bath at 40-60°C for 16-20 hours to obtain a third reaction solution. The water bath temperature and reaction time are not limited and can be set according to actual usage requirements; for example, a water bath temperature of 40°C and a reaction time of 16 hours.

[0086] Step S53: Filter, wash and dry the third reaction solution to obtain the flame retardant.

[0087] In this embodiment, the third reaction solution is filtered, washed, and dried to obtain a flame retardant. That is, by filtering, washing, and drying the third reaction solution, a stable ATH@Co-TA type solid flame retardant is obtained.

[0088] In one implementation, such as Figure 6 As shown, Figure 6 This is a schematic flowchart of another embodiment of the preparation method of PBT composite material provided in this application. The PBT composite material simultaneously possesses flame retardant properties, adsorption properties for VOC small molecules, and antioxidant properties. The preparation of the PBT composite material specifically includes the following steps:

[0089] Step S61: Provide 80-100 parts PBT, 10-16 parts adsorption aid, 16-22 parts flame retardant and 0.1-0.5 parts antioxidant.

[0090] In this embodiment, 80-100 parts of PBT, 10-16 parts of adsorption aid, 16-22 parts of flame retardant, and 0.1-0.5 parts of antioxidant are provided. The quantities of PBT, adsorption aid, flame retardant, and antioxidant are not limited and can be specifically set according to actual usage needs. For example, 100 parts of PBT, 16 parts of adsorption aid, 16 parts of flame retardant, and 0.1 parts of antioxidant are provided.

[0091] The addition of antioxidants allows them to bind with oxygen and react chemically, preventing oxygen from directly reacting with and oxidizing the PBT composite material. As a result, the PBT composite material produced has better antioxidant properties.

[0092] Step S62: Mix 80-100 parts of PBT, 10-16 parts of adsorption aid, 16-22 parts of flame retardant and 0.1-0.5 parts of antioxidant to obtain a mixture.

[0093] In this embodiment, 80-100 parts of PBT, 10-16 parts of adsorption aid, 16-22 parts of flame retardant, and 0.1-0.5 parts of antioxidant are mixed to obtain a mixture. Specifically, 80-100 parts of PBT, 10-16 parts of adsorption aid, 16-22 parts of flame retardant, and 0.1-0.5 parts of antioxidant are mixed and stirred evenly to obtain a mixture.

[0094] Step S63: Extrude the mixture to obtain the PBT composite material.

[0095] In this embodiment, the mixture is extruded to obtain a PBT composite material. Since the PBT composite material includes an adsorbent, flame retardant, and antioxidant, and the adsorbent adsorbs VOC molecules upon contact with them, thus possessing the ability to adsorb VOC molecules, and the flame retardant and antioxidant both exhibit flame-retardant and antioxidant properties, the PBT composite material containing these additives possesses the ability to adsorb VOC molecules, flame retardant properties, and antioxidant properties.

[0096] The following will use several specific experimental examples and comparative experimental examples to illustrate and explain this application, but these should not be used to limit the scope of this application.

[0097] Experimental Example 1:

[0098] Weigh 300g of Tris solution and 400g of HCl solution and place them in a reactor dish. Stir at room temperature for 6 hours to prepare a Tris-HCl buffer solution. Weigh 600g of Tris-HCl buffer solution, 300g of wollastonite, 200g of gallic acid (GA), and 700g of deionized water and place them in a reactor dish. React at 70℃ for 12 hours and cool to room temperature to obtain solution A. Filter, wash, and dry solution A at 70℃ for 6 hours to obtain GA@wollastonite. Weigh 200g of acrylamide (AM), 400g of GA@wollastonite, 2g of crosslinking agent N,N'-methylenebisacrylamide, 3g of initiator sodium persulfate, 1.0kg of deionized water, and 160g of sodium alginate (SA) and place them in a reactor dish. React in a 70℃ water bath for 16 hours and cool to room temperature to obtain solution B. Filter, wash, and dry solution B to obtain adsorption aid M1-PAM / SA / GA@wollastonite.

[0099] Weigh 400g of tannic acid (TA), 200g of cobalt chloride, 800g of deionized water, and 300g of aluminum hydroxide (ATH) and place them in a reactor dish. React at 40℃ for 16h to obtain solution A. Filter, wash, and dry solution A to obtain flame retardant N1 of type ATH@Co-TA.

[0100] 80 parts of PBT, 10 parts of adsorbent M1, 16 parts of flame retardant N1, and 0.1 parts of antioxidant Irganox 1010 were weighed, mixed, and stirred evenly to obtain a mixture. The mixture was then extruded and granulated to obtain PBT composite material P1. The temperatures and screw speeds of the twin-screw extruder were as follows: Zone 1: 200℃, Zone 2: 240℃, Zone 3: 240℃, Zone 4: 240℃, Zone 5: 240℃, Zone 6: 240℃, Die head: 240℃, and screw speed: 200 r / min. After obtaining PBT composite material P1, its flame retardancy and VOC performance were tested. The specific test results are shown in Table 1.

[0101] Experimental Example 2:

[0102] 400g of Tris solution and 600g of HCl solution were weighed and placed in a reactor vessel, and stirred at room temperature for 8 hours to prepare a Tris-HCl buffer solution. 700g of Tris-HCl buffer solution, 400g of wollastonite, 240g of gallic acid (GA), and 900g of deionized water were weighed and placed in the reactor vessel, reacted at 90℃ for 16 hours, and cooled to room temperature to obtain solution A. Solution A was filtered, washed, and dried at 90℃ for 8 hours to obtain GA@wollastonite. 240g of acrylamide (AM), 500g of GA@wollastonite, 4g of crosslinking agent N,N'-methylenebisacrylamide, 5g of initiator sodium persulfate, 1.2kg of deionized water, and 200g of sodium alginate (SA) were weighed and placed in a reactor vessel, reacted in a 90℃ water bath for 20 hours, and cooled to room temperature to obtain solution B. Solution B was filtered, washed, and dried to obtain the adsorption aid M2-PAM / SA / GA@wollastonite.

[0103] Weigh 500g of tannic acid (TA), 240g of cobalt chloride, 1.2kg of deionized water, and 400g of aluminum hydroxide (ATH) and place them in a reactor dish. React at 60℃ for 20h to obtain solution A. Filter, wash, and dry solution A to obtain flame retardant N2 of type ATH@Co-TA.

[0104] 100 parts of PBT, 16 parts of adsorbent M2, 22 parts of flame retardant N2, 0.1 parts of Irganox 1010, 0.2 parts of Irganox 168, and 0.2 parts of Irganox 1330 were weighed, mixed, and stirred evenly to obtain a mixture. The mixture was then extruded and granulated to obtain PBT composite material P2. The temperatures and screw speeds of each zone of the twin-screw extruder were as follows: Zone 1: 220℃, Zone 2: 260℃, Zone 3: 260℃, Zone 4: 260℃, Zone 5: 260℃, Zone 6: 260℃, Die head: 260℃, and screw speed: 280 r / min. After obtaining PBT composite material P2, its flame retardancy and VOC performance were tested. The specific test results are shown in Table 1.

[0105] Experimental Example 3:

[0106] 350g of Tris solution and 500g of HCl solution were weighed and placed in a reactor vessel, and stirred at room temperature for 7 hours to prepare a Tris-HCl buffer solution. 650g of Tris-HCl buffer solution, 350g of wollastonite, 220g of gallic acid (GA), and 800g of deionized water were weighed and placed in the reactor vessel, reacted at 80℃ for 14 hours, and cooled to room temperature to obtain solution A. Solution A was filtered, washed, and dried at 80℃ for 7 hours to obtain GA@wollastonite. 220g of acrylamide (AM), 450g of GA@wollastonite, 3g of crosslinking agent N,N'-methylenebisacrylamide, 4g of initiator sodium persulfate, 1.1kg of deionized water, and 180g of sodium alginate (SA) were weighed and placed in a reactor vessel, reacted in an 80℃ water bath for 18 hours, and cooled to room temperature to obtain solution B. Solution B was filtered, washed, and dried to obtain the adsorption aid M3-PAM / SA / GA@wollastonite.

[0107] Weigh 450g of tannic acid (TA), 220g of cobalt chloride, 1.0kg of deionized water, and 350g of aluminum hydroxide (ATH) and place them in a reactor dish. React at 50℃ for 18h to obtain solution A. Filter, wash, and dry solution A to obtain flame retardant N3 of type ATH@Co-TA.

[0108] 90 parts of PBT, 13 parts of adsorbent M3, 19 parts of flame retardant N3, 0.1 parts of Irganox 168, and 0.2 parts of Irganox 1010 were weighed, mixed, and stirred evenly to obtain a mixture. The mixture was then extruded and granulated to obtain PBT composite material P3. The temperatures and screw speeds of each zone of the twin-screw extruder were as follows: Zone 1 temperature 215℃, Zone 2 temperature 255℃, Zone 3 temperature 255℃, Zone 4 temperature 255℃, Zone 5 temperature 255℃, Zone 6 temperature 255℃, Die head temperature 255℃, and screw speed 245 r / min. After obtaining PBT composite material P3, its flame retardancy and VOC performance were tested. The specific test results are shown in Table 1.

[0109] Experiment Example 4:

[0110] 380g of Tris solution and 460g of HCl solution were weighed and placed in a reactor dish, and stirred at room temperature for 7 hours to prepare a Tris-HCl buffer solution. 660g of Tris-HCl buffer solution, 375g of wollastonite, 235g of gallic acid (GA), and 835g of deionized water were weighed and placed in the reactor dish, reacted at 85℃ for 15 hours, and cooled to room temperature to obtain solution A. Solution A was filtered, washed, and dried at 75℃ for 7 hours to obtain GA@wollastonite. 235g of acrylamide (AM), 455g of GA@wollastonite, 3.5g of crosslinking agent N,N'-methylenebisacrylamide, 4.5g of initiator sodium persulfate, 1.15kg of deionized water, and 195g of sodium alginate (SA) were weighed and placed in a reactor dish, reacted in a 75℃ water bath for 19 hours, and cooled to room temperature to obtain solution B. Solution B was filtered, washed, and dried to obtain the adsorption aid M4-PAM / SA / GA@wollastonite.

[0111] Weigh 465g of tannic acid (TA), 215g of cobalt chloride, 925g of deionized water, and 395g of aluminum hydroxide (ATH) and place them in a reactor dish. React at 55℃ for 19h to obtain solution A. Filter, wash, and dry solution A to obtain flame retardant N4 of type ATH@Co-TA.

[0112] 85 parts of PBT, 15 parts of adsorbent M4, 21 parts of flame retardant N4, 0.1 parts of Irganox 1010, and 0.2 parts of Irganox 1330 were weighed, mixed, and stirred evenly to obtain a mixture. The mixture was then extruded and granulated to obtain PBT composite material P4. The temperatures and screw speeds of each zone of the twin-screw extruder were as follows: Zone 1 temperature 215℃, Zone 2 temperature 245℃, Zone 3 temperature 245℃, Zone 4 temperature 245℃, Zone 5 temperature 245℃, Zone 6 temperature 245℃, Die head temperature 245℃, and screw speed 245 r / min. After obtaining PBT composite material P4, its flame retardancy and VOC performance were tested. The specific test results are shown in Table 1.

[0113] Example 5:

[0114] Weigh 385g of Tris solution and 595g of HCl solution into a reactor dish and stir at room temperature for 8 hours to prepare a Tris-HCl buffer solution. Weigh 685g of Tris-HCl buffer solution, 365g of wollastonite, 235g of gallic acid (GA), and 855g of deionized water into the reactor dish and react at 85℃ for 15 hours. Cool to room temperature to obtain solution A. Filter, wash, and dry solution A at 85℃ for 8 hours to obtain GA@wollastonite. Weigh 235g of acrylamide (AM), 485g of GA@wollastonite, 3.5g of crosslinking agent N,N'-methylenebisacrylamide, 4.5g of initiator sodium persulfate, 1.15kg of deionized water, and 195g of sodium alginate (SA) into a reactor dish and react in a water bath at 85℃ for 19 hours. Cool to room temperature to obtain solution B. Filter, wash, and dry solution B to obtain the adsorption aid M5-PAM / SA / GA@wollastonite.

[0115] Weigh 485g of tannic acid (TA), 235g of cobalt chloride, 1.15kg of deionized water, and 385g of aluminum hydroxide (ATH) and place them in a reactor dish. React at 55℃ for 19h to obtain solution A. Filter, wash, and dry solution A to obtain flame retardant N5 of type ATH@Co-TA.

[0116] 95 parts of PBT, 14 parts of adsorbent M5, 21 parts of flame retardant N5, 0.1 parts of Irganox 1010, and 0.1 parts of Irganox 168 were weighed, mixed, and stirred evenly to obtain a mixture. The mixture was then extruded and granulated to obtain PBT composite material P5. The temperatures and screw speeds of each zone of the twin-screw extruder were as follows: Zone 1 temperature 215℃, Zone 2 temperature 255℃, Zone 3 temperature 255℃, Zone 4 temperature 255℃, Zone 5 temperature 255℃, Zone 6 temperature 255℃, Die head temperature 255℃, and screw speed 255 r / min. After obtaining PBT composite material P5, its flame retardancy and VOC performance were tested. The specific test results are shown in Table 1.

[0117] Comparative Example 1:

[0118] 95 parts of PBT, 0.1 parts of Irganox 1010, and 0.1 parts of Irganox 168 were weighed, mixed, and stirred evenly to obtain a mixture. The mixture was then extruded and granulated to obtain PBT composite material D1. The temperatures and screw speeds of each zone of the twin-screw extruder were as follows: Zone 1 temperature 215℃, Zone 2 temperature 255℃, Zone 3 temperature 255℃, Zone 4 temperature 255℃, Zone 5 temperature 255℃, Zone 6 temperature 255℃, Die head temperature 255℃, and screw speed 255 r / min. After obtaining PBT composite material D1, its flame retardancy and VOC performance were tested. The specific test results are shown in Table 1.

[0119] Table 1 Performance Test Results

[0120]

[0121] As can be seen from the table above, the flame retardant and VOC properties of P1-5 prepared in this application are better than those of D1, which indicates that the flame retardant and VOC properties of the PBT composite material in this application are better.

[0122] The above description is merely an embodiment of this application and does not limit the patent scope of this application. Any equivalent structural or procedural transformations made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.

Claims

1. A PBT composite material, characterized in that, The PBT composite material comprises: 80-100 parts of PBT and 10-16 parts of adsorption aid; The adsorption aid is a composite material formed by a wollastonite complex and an acrylamide polymer; the acrylamide polymer is a polyacrylamide chain structure and sodium alginate bonded to the polyacrylamide chain; the wollastonite complex is gallic acid-coated wollastonite.

2. The PBT composite material according to claim 1, characterized in that, The PBT composite material comprises 80-100 parts of PBT, 10-16 parts of adsorption aid, and 16-22 parts of flame retardant; wherein the flame retardant is one or more of cobalt chloride, aluminum hydroxide, and aluminum hydroxide modified with tannic acid.

3. The PBT composite material according to claim 1, characterized in that, The PBT composite material comprises 80-100 parts of PBT, 10-16 parts of adsorption aid, 16-22 parts of flame retardant, and 0.1-0.5 parts of antioxidant.

4. A method for preparing a PBT composite material, characterized in that, The method includes: Provide 80-100 parts of PBT and 10-16 parts of adsorption aid; wherein, the adsorption aid is a composite material formed by wollastonite complex and acrylamide polymer; the acrylamide polymer is a polyacrylamide chain structure and sodium alginate bonded to the polyacrylamide chain; the wollastonite complex is gallic acid-coated wollastonite; The 80-100 parts of PBT and the 10-16 parts of adsorption aid are mixed to obtain a mixture; The mixture is extruded to obtain a PBT composite material.

5. The method for preparing the PBT composite material according to claim 4, characterized in that, The adsorption aid provided in 10-16 parts comprises: By weight, it provides 20-24 parts acrylamide, 40-50 parts gallic acid-coated wollastonite, 0.2-0.4 parts crosslinking agent, 0.3-0.5 parts initiator, 100-120 parts water and 16-20 parts sodium alginate; The mixture of gallic acid-coated wollastonite, acrylamide, crosslinking agent, initiator, water and sodium alginate was placed in a water bath at 70-90°C and reacted for 16-20 hours to obtain the first reaction solution. The first reaction solution was filtered, washed, and dried to obtain the adsorption aid.

6. The method for preparing the PBT composite material according to claim 5, characterized in that, The wollastonite provided, consisting of 40-50 parts gallic acid-coated silica, comprises: Provide 60-70 parts buffer solution, 30-40 parts wollastonite, 20-24 parts gallic acid and 70-90 parts water by weight; The mixture of wollastonite, gallic acid, water and buffer solution is placed in a water bath at 70-90°C and reacted for 12-16 hours to obtain a second reaction solution. The second reaction solution was filtered, washed, and dried to obtain gallic acid-coated wollastonite.

7. The method for preparing the PBT composite material according to claim 4, characterized in that, The method includes: Provide 80-100 parts PBT, 10-16 parts adsorption aid and 16-22 parts flame retardant; wherein the flame retardant is one or more of cobalt chloride, aluminum hydroxide and tannic acid modified aluminum hydroxide; The 80-100 parts of PBT, the 10-16 parts of adsorption aid, and the 16-22 parts of flame retardant are mixed to obtain a mixture.

8. The method for preparing the PBT composite material according to claim 7, characterized in that, The flame retardant is cobalt chloride, aluminum hydroxide, and aluminum hydroxide modified with tannic acid; the provision of 16-22 parts of flame retardant includes: The mixture comprises, by weight, 40-50 parts tannic acid, 20-24 parts cobalt chloride, 80-120 parts water and 30-40 parts aluminum hydroxide; The mixture of tannic acid, cobalt chloride, water and aluminum hydroxide is placed in a water bath at 40-60°C and reacted for 16-20 hours to obtain a third reaction solution. The third reaction solution is filtered, washed, and dried to obtain the flame retardant.

9. The method for preparing the PBT composite material according to claim 4, characterized in that, The method includes: It provides 80-100 parts PBT, 10-16 parts adsorption aid, 16-22 parts flame retardant and 0.1-0.5 parts antioxidant; The 80-100 parts of PBT, the 10-16 parts of the adsorption aid, the 16-22 parts of the flame retardant, and the 0.1-0.5 parts of the antioxidant are mixed to obtain a mixture.

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