Resin material, preparation method and application thereof, and 3D printed product

Abstract

The invention belongs to a resin material, and provides a resin material, a preparation method and application thereof, and a 3D printed product in order to solve the technical problems that a common resin material in an existing 3D printing technology is insufficient in mechanical strength, easy to deform at a high temperature and insufficient in environmental protection performance. Comprising silane coupling agent modified furan resin, a bio-based toughening agent, a thermal curing agent and other auxiliaries, wherein the silane coupling agent modified furan resin is prepared by carrying out polycondensation on silanized cardanol and furfuryl alcohol. The mechanical property and thermal stability of the material are improved through the silane coupling agent, and the application requirements for high strength and high temperature resistance are met. And secondly, the printing precision and the rheological property are optimized, so that the surface quality and the dimensional stability of the material in 3D printing are remarkably improved. Meanwhile, a bio-based component is introduced into the material, so that the environmental protection property and the degradability are enhanced, and the concept of green chemistry and sustainable development is met.

Description

Technical Field

[0001] The present application relates to a resin material, and specifically to a resin material and its preparation method, application, and 3D printed products. Background Art

[0002] 3D printing technology offers advantages such as rapid manufacturing, personalized customization, and the ability to form complex structures. It has enormous potential for application in manufacturing, healthcare, construction, and other fields. In manufacturing, it can be used to create precision molds, such as in the aerospace industry, where complex, lightweight structural components can be manufactured. In the medical field, personalized surgical guides can be created based on patient data, improving surgical success rates. In the construction field, building components can be printed on-site, streamlining processes and enabling unique designs. However, the resin materials commonly used in existing 3D printing technologies have many limitations, including insufficient mechanical strength, making them difficult to meet requirements for high structural strength. In terms of thermal stability, they have a low glass transition temperature and are prone to softening and deformation in high-temperature environments. In terms of environmental friendliness, volatile organic compounds are released during production and use, making waste difficult to degrade and inconsistent with the trend of green manufacturing. Summary of the Invention

[0003] This application addresses the technical problems of resin materials commonly used in existing 3D printing technology, such as insufficient mechanical strength, easy deformation at high temperatures, and insufficient environmental performance, and provides a resin material and its preparation method, application, and 3D printed products.

[0004] In order to achieve the above objectives, this application adopts the following technical solutions: In a first aspect, the present application proposes a resin material comprising: a furan resin modified with a silane coupling agent, a bio-based toughening agent, a thermal curing agent, and other additives; The silane coupling agent-modified furan resin is prepared by polycondensation of silylated cardanol and furfuryl alcohol.

[0005] Furthermore, the silylated cardanol is produced by reacting cardanol with a silane coupling agent under acidic catalysis.

[0006] Furthermore, the silane coupling agent is (3-aminopropyl)triethoxysilane.

[0007] Furthermore, the structure of the silylated cardanol is: .

[0008] Furthermore, the bio-based toughening agent is polylactic acid or polyhydroxyalkanoate.

[0009] Furthermore, the thermal curing agent is hexamethylenetetramine or dicyandiamide.

[0010] Furthermore, the other auxiliary agents are stabilizers and surfactants.

[0011] In a second aspect, the present application proposes a method for preparing the above-mentioned resin material, comprising: Cardanol and a silane coupling agent are reacted in a molar ratio of (1:1) to (1:2) in the presence of an acidic catalyst at 60 to 100°C for 2 to 5 hours to obtain silylated cardanol; wherein the amount of the acidic catalyst is 0.5 to 2%; Silylated cardanol and furfuryl alcohol are mixed in a mass ratio of (3:7) to (5:5) in the presence of an acid catalyst, and polycondensed at 80-120°C until the viscosity reaches 200-500 mPa·s at 25°C to obtain a silane coupling agent-modified furan resin. adding a bio-based toughening agent and a thermal curing agent to the silane coupling agent-modified furan resin, and mixing them uniformly to obtain a mixture; After the mixture was cooled to room temperature, a resin material was obtained.

[0012] In a third aspect, the present application proposes an application of the above-mentioned resin material in 3D inkjet printing materials.

[0013] In a fourth aspect, the present application proposes a 3D printed product prepared using the above-mentioned resin material.

[0014] Compared with the prior art, this application has the following beneficial effects: The present application proposes a resin material, including a silane coupling agent-modified furan resin, a bio-based toughening agent, a thermal curing agent and other additives, wherein the silane coupling agent-modified furan resin is prepared by condensation polymerization of silanized cardanol and furfuryl alcohol. The present application improves the mechanical properties and thermal stability of the material through a silane coupling agent, meeting the application requirements of high strength and high temperature resistance. Secondly, the printing accuracy and rheological properties are optimized, so that the surface quality and dimensional stability of the material in 3D printing are significantly improved. At the same time, the introduction of bio-based components into the material enhances its environmental friendliness and degradability, which is in line with the concepts of green chemistry and sustainable development. In addition, the improvement in process efficiency shortens the thermal curing time and reduces the curing temperature, further improving production efficiency and reducing energy consumption. The optimization of the present application in terms of mechanical properties, printing accuracy, environmental friendliness and process efficiency also shows its broad application prospects.

[0015] This application also proposes a method for preparing the above-mentioned resin material, an application of the above-mentioned resin material in 3D inkjet printing materials, and a 3D printed product having all the advantages of the above-mentioned resin material. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0017] Figure 1 Schematic diagram of the reaction principle of the resin material of this application. DETAILED DESCRIPTION

[0018] To make the objectives, technical solutions, and advantages of the embodiments of the present application more clear, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Generally, the components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations.

[0019] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for protection, but merely represents selected embodiments of the present application. All other embodiments obtained by persons of ordinary skill in the art based on the embodiments in the present application without creative work are within the scope of protection of the present application.

[0020] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0021] In the description of the embodiments of the present application, it should be noted that if the terms "upper", "lower", "horizontal", "inner", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the accompanying drawings, or the orientation or position relationship in which the product of the invention is usually placed when in use. This is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, it should not be understood as a limitation on the present application. In addition, the terms "first", "second", etc. are only used to distinguish the description and should not be understood as indicating or implying relative importance.

[0022] In addition, if the term "horizontal" appears, it does not mean that the component must be absolutely horizontal, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0023] In the description of the embodiments of this application, it should also be noted that, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to internal connections between two components. Those skilled in the art can understand the specific meanings of the above terms in this application based on specific circumstances.

[0024] Traditional furan resins, primarily made from furfuryl alcohol or furfural, rely on petrochemical resources, presenting environmental risks and poor biocompatibility. Existing 3D printing resins, on the other hand, mostly utilize petroleum-based photosensitive resins, such as acrylates. These materials suffer from brittleness, poor heat resistance, and non-renewable properties. Cardanol, a natural phenolic compound with long alkyl chains and reactive hydroxyl groups, faces challenges in resin applications due to its low reactivity and poor compatibility with inorganic fillers.

[0025] Furan resin, a bio-based material, possesses excellent heat resistance and mechanical properties, but its application in 3D printing is limited by its brittleness and low viscosity. Silane coupling agents, commonly used modifiers, can effectively improve the interfacial properties and mechanical strength of the resin. Therefore, the development of a high-purity, high-strength, heat-curable bio-based furan resin modified with silane coupling agents has significant application value.

[0026] Based on the above situation, the present application proposes a resin material and its preparation method, application, and 3D printed products. The present application is described in detail below with reference to embodiments and drawings.

[0027] The present application proposes a resin material that may include: a silane coupling agent-modified furan resin, a bio-based toughening agent, a thermal curing agent, and other additives. The silane coupling agent-modified furan resin is prepared by polycondensation of silanized cardanol and furfuryl alcohol.

[0028] It should be noted that, in the present application, other auxiliary agents may be stabilizers and surfactants.

[0029] In this application, the resin material is prepared by the polycondensation reaction of silanized cardanol and furfuryl alcohol. Cardanol is a natural phenolic compound extracted from cashew nut shell oil with a unique chemical structure. Its long-chain alkyl group gives the material a certain flexibility and hydrophobicity. Silanization treatment is to introduce a silane coupling agent into the cardanol molecule. One end of the silane coupling agent can chemically react with the cardanol, and the other end can produce a good interface bond with the components such as the bio-based toughening agent added later. Furfuryl alcohol, as another important raw material, undergoes a polycondensation reaction with silanized cardanol under specific conditions to form a furan resin matrix with a three-dimensional network structure. This modified furan resin combines the excellent heat resistance and chemical corrosion resistance of the furan resin itself with the unique properties brought by silanized cardanol, such as better interfacial compatibility and a certain toughness. The furan resin modified with a silane coupling agent has excellent heat resistance, can maintain good physical and chemical properties under high temperature environment, and is not easy to decompose or deform. At the same time, the introduction of the silane coupling agent enhances the interfacial bonding between the resin and fillers or other additives, improving the overall strength and stability of the material. Furthermore, the resin material of this application also has good chemical corrosion resistance and can resist erosion by a variety of acids, alkalis, organic solvents, etc., making it suitable for some applications with high corrosion resistance requirements.

[0030] In this application, the primary function of bio-based toughening agents is to improve the toughness of resin materials. In resin materials, the pure furan resin matrix is ​​typically highly brittle and prone to fracture when subjected to external forces. The addition of bio-based toughening agents can alleviate this shortcoming by forming a dispersed phase within the resin matrix or interacting with the matrix. When the material is subjected to external impact, the toughening agent absorbs and disperses energy, preventing crack propagation, thereby improving the material's elongation at break and impact strength.

[0031] Thermal curing agents in resin materials promote the curing reaction of the resin. Under heating conditions, the thermal curing agent can chemically react with the active groups in the silane coupling agent-modified furan resin, crosslinking the resin molecular chains and forming a three-dimensional network structure. This transforms the resin from a liquid or semi-solid state to a solid state, achieving the desired physical and chemical properties. The cured resin material has high hardness, strength, and heat resistance, which can meet the requirements of different application scenarios. In actual applications, the choice of thermal curing agent can be determined by the type of resin, curing conditions, and the performance requirements of the final product. Different thermal curing agents have different curing temperatures, curing speeds, and performance characteristics of the cured product.

[0032] Among other additives, the main function of stabilizers is to prevent the performance of resin materials from changing during storage and use. During the preparation, storage and processing of resins, they may be affected by factors such as light, heat, and oxygen, causing the resin molecular chains to undergo degradation, cross-linking, and other reactions, thereby affecting the performance of the material. Stabilizers can absorb or inhibit the effects of these adverse factors, delay the aging process of the resin, and maintain the stability of the material's performance. Surfactants play a role in reducing surface tension, improving wettability and dispersibility in resin materials. During the processing of the resin, surfactants can enable the resin to better wet fillers or other additives, promote their uniform dispersion in the resin matrix, and improve the performance and quality of the material. For example, when preparing composite materials, surfactants can form a good interface between the surface of the filler particles and the resin matrix, reduce interface defects, and improve the strength and toughness of the composite material.

[0033] The resin material proposed in this application is a high-purity, high-strength, heat-curable bio-based furan resin modified with a silane coupling agent, specifically designed for 3D inkjet printing. Modification of the furan resin with a silane coupling agent significantly improves its mechanical strength, thermal stability, and printing accuracy. Experimental verification demonstrates the material's excellent biocompatibility, environmental friendliness, and biodegradability, making it suitable for high-precision, high-strength 3D-printed products.

[0034] In addition, the present application also proposes a method for preparing a resin material, which may include: S1. Preparation of silane coupling agent-modified cardanol: Cardanol and a silane coupling agent are reacted in the presence of an acidic catalyst at 60-100°C for 2-5 hours, wherein the molar ratio of cardanol to the silane coupling agent is (1:1)-(1:2), and the amount of the acidic catalyst is 0.5-2%, to obtain silanized cardanol.

[0035] S2, Synthesis of Furan Resin: Silylated cardanol and furfuryl alcohol are mixed in a mass ratio of (3:7) to (5:5) with an acidic catalyst and polycondensed at 80-120°C to a viscosity of 200-500 mPa·s (25°C) to obtain a silane coupling agent-modified furan resin.

[0036] S3, preparation of resin material: taking 100 parts by mass of silane coupling agent modified furan resin as a base, adding 10 to 20 parts by mass of bio-based toughening agent and 5 to 10 parts by mass of thermal curing agent to obtain a resin material.

[0037] In actual operation, the silane coupling agent-modified furan resin can be first heated to 60~80°C, and then the bio-based toughening agent and thermal curing agent are added step by step, and fully mixed at a stirring rate of 500~800 rpm to ensure uniform dispersion and no agglomeration, and finally obtain the resin material of the present application.

[0038] The preparation method proposed in this application has significant technical advantages and beneficial effects. It replaces traditional petroleum-based phenol with renewable plant phenol, reduces dependence on non-renewable petrochemical resources, and meets the requirements of green chemistry and sustainable development.

[0039] The present application is further described below through several embodiments.

[0040] Example 1 S1, cardanol and a silane coupling agent are reacted at 60° C. for 5 hours in the presence of an acidic catalyst, wherein the molar ratio of cardanol to the silane coupling agent is 1:1 and the amount of the acidic catalyst is 1%, to obtain silylated cardanol.

[0041] S2, silylated cardanol and furfuryl alcohol are mixed in a mass ratio of 3:7 with an acidic catalyst, and polycondensed at 120°C until the viscosity reaches 200 mPa·s (25°C) to obtain a silane coupling agent-modified furan resin.

[0042] S3. 100 parts by mass of a silane coupling agent-modified furan resin was added to 100 parts by mass of a bio-based toughening agent and 10 parts by mass of a thermal curing agent to obtain a resin material. The silane coupling agent-modified furan resin was first heated to 60°C. The bio-based toughening agent and thermal curing agent were then added in stages and thoroughly mixed at a stirring rate of 500 rpm to ensure uniform dispersion and absence of agglomerates, thereby obtaining the resin material of the present application.

[0043] Example 2 S1, cardanol and a silane coupling agent are reacted at 100° C. for 2 hours in the presence of an acidic catalyst, wherein the molar ratio of cardanol to the silane coupling agent is 1:2 and the amount of the acidic catalyst is 2%, to obtain silanized cardanol.

[0044] S2: Silylated cardanol and furfuryl alcohol are mixed in a mass ratio of 3:6 with an acidic catalyst and polycondensed at 100°C until the viscosity reaches 300 mPa·s (25°C) to obtain a silane coupling agent-modified furan resin.

[0045] S3. Add 20 parts by mass of a bio-based toughening agent and 5 parts by mass of a thermal curing agent to 100 parts by mass of a silane coupling agent-modified furan resin to obtain a resin material. The silane coupling agent-modified furan resin is first heated to 80°C. The bio-based toughening agent and thermal curing agent are then added in stages and thoroughly mixed at a stirring rate of 500 rpm to ensure uniform dispersion and absence of agglomerates, thereby obtaining the resin material of the present application.

[0046] Example 3 S1, cardanol and a silane coupling agent are reacted at 80° C. for 3 hours in the presence of an acidic catalyst, wherein the molar ratio of cardanol to the silane coupling agent is 3:4 and the amount of the acidic catalyst is 1%, to obtain silylated cardanol.

[0047] S2, mixing silylated cardanol and furfuryl alcohol in a mass ratio of 5:5 with an acidic catalyst, and polycondensing at 100°C until the viscosity reaches 500 mPa·s (25°C) to obtain a silane coupling agent-modified furan resin.

[0048] S3. 15 parts by mass of a bio-based toughening agent and 10 parts by mass of a thermal curing agent are added to 100 parts by mass of a silane coupling agent-modified furan resin to obtain a resin material. The silane coupling agent-modified furan resin is first heated to 70°C. The bio-based toughening agent and thermal curing agent are then added in stages and thoroughly mixed at a stirring rate of 800 rpm to ensure uniform dispersion and absence of agglomerates, thereby obtaining the resin material of the present application.

[0049] Example 4 S1, cardanol and a silane coupling agent are reacted at 70° C. for 4 hours in the presence of an acidic catalyst, wherein the molar ratio of cardanol to the silane coupling agent is 1:1 and the amount of the acidic catalyst is 0.5%, to obtain silanized cardanol.

[0050] S2, silylated cardanol and furfuryl alcohol are mixed in a mass ratio of 3:7 with an acidic catalyst, and polycondensed at 80°C until the viscosity reaches 200 mPa·s (25°C) to obtain a silane coupling agent-modified furan resin.

[0051] S3. Add 20 parts by mass of a bio-based toughening agent and 10 parts by mass of a thermal curing agent to 100 parts by mass of a silane coupling agent-modified furan resin to obtain a resin material. The silane coupling agent-modified furan resin is first heated to 80°C. The bio-based toughening agent and thermal curing agent are then added in stages and thoroughly mixed at a stirring rate of 600 rpm to ensure uniform dispersion and absence of agglomerates, thereby obtaining the resin material of the present application.

[0052] Example 5 S1, cardanol and a silane coupling agent are reacted at 90°C for 3 hours in the presence of an acidic catalyst, the molar ratio of cardanol to the silane coupling agent being 1:2, and the amount of the acidic catalyst being 1.5%, to obtain silylated cardanol.

[0053] S2, silylated cardanol and furfuryl alcohol are mixed in a mass ratio of 5:5 with an acidic catalyst, and polycondensed at 110°C until the viscosity reaches 400 mPa·s (25°C) to obtain a silane coupling agent-modified furan resin.

[0054] S3. 15 parts by mass of a bio-based toughening agent and 10 parts by mass of a thermal curing agent are added to 100 parts by mass of a silane coupling agent-modified furan resin to obtain a resin material. The silane coupling agent-modified furan resin is first heated to 60°C. The bio-based toughening agent and thermal curing agent are then added in stages and thoroughly mixed at a stirring rate of 700 rpm to ensure uniform dispersion and absence of agglomerates, thereby obtaining the resin material of the present application.

[0055] Example 6 S1, cardanol and a silane coupling agent are reacted at 100° C. for 2 hours in the presence of an acidic catalyst, wherein the molar ratio of cardanol to the silane coupling agent is 1:2 and the amount of the acidic catalyst is 2%, to obtain silanized cardanol.

[0056] S2: Silylated cardanol and furfuryl alcohol are mixed in a mass ratio of 3:6 with an acidic catalyst and polycondensed at 100°C until the viscosity reaches 300 mPa·s (25°C) to obtain a silane coupling agent-modified furan resin.

[0057] In step S3, 88 parts by weight of a silane coupling agent-modified furan resin, 10 parts by weight of a bio-based toughening agent (PLA), 6 parts by weight of a thermosetting agent (HMTA), and 4 parts by weight of other additives are mixed. First, the silane coupling agent-modified furan resin is stirred at 75°C for one hour. PLA and HMTA are then added and stirred until thoroughly mixed. Finally, the mixture is cooled to room temperature to obtain the resin material.

[0058] Example 7 S1, cardanol and a silane coupling agent are reacted at 80° C. for 3 hours in the presence of an acidic catalyst, wherein the molar ratio of cardanol to the silane coupling agent is 3:4 and the amount of the acidic catalyst is 1%, to obtain silylated cardanol.

[0059] S2, mixing silylated cardanol and furfuryl alcohol in a mass ratio of 5:5 with an acidic catalyst, and polycondensing at 100°C until the viscosity reaches 500 mPa·s (25°C) to obtain a silane coupling agent-modified furan resin.

[0060] In step S3, 80 parts by weight of a silane coupling agent-modified furan resin, 15 parts by weight of a bio-based toughening agent (PLA), 5 parts by weight of a thermosetting agent (HMTA), and 2 parts by weight of other additives are mixed. First, the silane coupling agent-modified furan resin is stirred and reacted at 70°C for 1.5 hours. PLA and HMTA are then added and stirred until uniformly mixed. Finally, the mixture is cooled to room temperature to obtain the resin material.

[0061] Example 8 S1, cardanol and a silane coupling agent are reacted at 60° C. for 5 hours in the presence of an acidic catalyst, wherein the molar ratio of cardanol to the silane coupling agent is 1:1 and the amount of the acidic catalyst is 1%, to obtain silylated cardanol.

[0062] S2, silylated cardanol and furfuryl alcohol are mixed in a mass ratio of 3:7 with an acidic catalyst, and polycondensed at 120°C until the viscosity reaches 200 mPa·s (25°C) to obtain a silane coupling agent-modified furan resin.

[0063] In step S3, 72 parts by weight of a silane coupling agent-modified furan resin, 18 parts by weight of a bio-based toughening agent (PLA), 8 parts by weight of a thermosetting agent (HMTA), and 3 parts by weight of other additives are mixed. During the preparation process, the silane coupling agent-modified furan resin is first stirred at 65°C for 2 hours. PLA and HMTA are then added and stirred until uniformly mixed. Finally, the mixture is cooled to room temperature to obtain the resin material.

[0064] In practical applications, the acidic catalyst used in the preparation of silanized cardanol can be p-toluenesulfonic acid, and the resulting silanized cardanol contains Si-OC bonds. When preparing silane coupling agent-modified furan resin, the acidic catalyst used can be oxalic acid.

[0065] Among them, the structure of silane coupling agent is: .

[0066] The structure of silylated cardanol is: .

[0067] The bio-based toughening agent can be polylactic acid (PLA) or polyhydroxyalkanoate (PHA), and the thermal curing agent can be hexamethylenetetramine or dicyandiamide.

[0068] In addition, when preparing silanized cardanol, nitrogen protection can be introduced throughout the process to prevent oxidation side reactions. The silane coupling agent can be slowly added dropwise to control the exothermic reaction, and the characteristic peak of the Si-OC bond can be monitored in real time by infrared spectroscopy (FTIR). To confirm the reaction endpoint.

[0069] The following is a further explanation of the technical effects of the present application in conjunction with some comparative examples.

[0070] Comparative Example 1 A mixture of 70 parts by weight of furan resin, 15 parts by weight of a bio-based toughening agent (PLA), 5 parts by weight of a thermosetting agent (HMTA), and 2 parts by weight of other additives was prepared. The furan resin was directly mixed with the PLA and HMTA and stirred for 1.5 hours. Finally, the mixture was cooled to room temperature to obtain the unmodified resin material.

[0071] Comparative Example 2 The preparation process involves 70 parts by weight of furan resin, 10 parts by weight of a bio-based toughening agent (PLA), 5 parts by weight of a thermosetting agent (HMTA), and 2 parts by weight of other additives. The furan resin is directly mixed with the PLA and HMTA and stirred for 1.5 hours. Finally, the mixture is cooled to room temperature to obtain the unmodified resin material.

[0072] Comparative Example 3 The preparation process involves 70 parts by weight of furan resin, 10 parts by weight of a bio-based toughening agent (PLA), 15 parts by weight of a thermosetting agent (HMTA), and 2 parts by weight of other additives. The furan resin is directly mixed with the PLA and HMTA and stirred for 1.5 hours. Finally, the mixture is cooled to room temperature to obtain the unmodified resin material.

[0073] Examples 6-8 of the present application and comparative examples 1-3 containing ordinary furan resin were used as resin materials for 3D inkjet printing and subjected to physical and chemical characterization, tensile strength mechanical testing, and printing accuracy testing. Specific performance indicators are shown in Table 1.

[0074] Table 1 Test performance table

[0075] As can be seen from Table 1, the present application significantly improves the mechanical properties, thermal stability and printing accuracy of the resin by modifying the furan resin with a silane coupling agent. Compared with the unmodified resin material in the control group, the modified resin shows a significant improvement in tensile strength and heat deformation temperature. The tensile strength and heat deformation temperature of the modified resin material are better than those of the control group material, indicating that it has better mechanical properties and thermal stability. In addition, the modified resin also shows significant advantages in printing accuracy. Compared with the control group, the printing accuracy of the modified resin is more accurate and can meet the requirements of high-precision 3D printing. In addition to mechanical properties and printing accuracy, the modified material also exhibits excellent biocompatibility, environmental protection and degradability, which meet the needs of modern green manufacturing. These advantages make the modified furan resin material have broad application prospects in the field of 3D printing, especially suitable for 3D printed products requiring high strength and high precision. In summary, the furan resin material modified by the silane coupling agent in this application has broken through the technical bottleneck of traditional resins and demonstrated great market potential and application value. The core of this application is to use silane coupling agent to modify cardanol and use it as a raw material to replace aldehyde compounds. This application not only significantly reduces the free formaldehyde content of the resin, but also improves the tensile strength and heat resistance of the resin through its unique molecular structure, thereby enhancing the mechanical properties and thermal stability of the resin. Figure 1 The figure shows the reaction principle diagram of the resin material of the present application.

[0076] In summary, this application also proposes the use of the aforementioned resin material in 3D inkjet printing materials, as well as a 3D-printed product prepared using the aforementioned resin material. This application also successfully synthesizes a photocurable furan resin that is both biodegradable and compatible with 3D printing by chemically modifying cardanol with a silane coupling agent to enhance its reactivity and interfacial bonding ability.

[0077] This application demonstrates significant advantages in many aspects. First, through the gradient modification of silane coupling agents, the mechanical properties and thermal stability of the material are improved, meeting the application requirements of high strength and high temperature resistance. Secondly, the printing accuracy and rheological properties are optimized, so that the surface quality and dimensional stability of the material in 3D printing are significantly improved. At the same time, the introduction of bio-based components into the material enhances environmental protection and degradability, in line with the concepts of green chemistry and sustainable development. In addition, the improvement in process efficiency shortens the thermal curing time and reduces the curing temperature, further improving production efficiency and reducing energy consumption. As a high-purity, high-strength, thermally cured bio-based furan resin material modified with a silane coupling agent, it is particularly suitable for 3D inkjet printing technology. This material modifies the furan resin with a silane coupling agent, significantly improving the mechanical strength, thermal stability and printing accuracy of the resin. Therefore, the optimization of this application in terms of mechanical properties, printing accuracy, environmental protection and process efficiency has demonstrated its broad application prospects.

[0078] The above are merely preferred embodiments of the present application and are not intended to limit the present application. Those skilled in the art will readily appreciate that various modifications and variations are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present application shall be included within the scope of protection of the present application.

Claims

1. A resin material, characterized in that: include: Silane coupling agent modified furan resin, bio-based toughening agent, thermal curing agent and other additives; The silane coupling agent-modified furan resin is prepared by polycondensation of silylated cardanol and furfuryl alcohol.

2. A resin material according to claim 1, characterized in that: The silylated cardanol is produced by reacting cardanol with a silane coupling agent under acidic catalysis.

3. A resin material according to claim 2, characterized in that: The silane coupling agent is (3-aminopropyl)triethoxysilane.

4. The resin material according to claim 1, characterized in that: The structure of the silylated cardanol is: 。 5. The resin material according to claim 1, characterized in that: The bio-based toughening agent is polylactic acid or polyhydroxyalkanoate.

6. The resin material according to claim 1, characterized in that: The thermal curing agent is hexamethylenetetramine or dicyandiamide.

7. The resin material according to claim 1, characterized in that: The other auxiliary agents are stabilizers and surfactants.

8. A method for preparing the resin material according to any one of claims 1 to 7, characterized in that: include: Cardanol and a silane coupling agent are reacted in a molar ratio of (1:1) to (1:2) in the presence of an acidic catalyst at 60 to 100°C for 2 to 5 hours to obtain silylated cardanol; wherein the amount of the acidic catalyst is 0.5 to 2%; Silylated cardanol and furfuryl alcohol are mixed in a mass ratio of (3:7) to (5:5) in the presence of an acid catalyst, and polycondensed at 80-120°C until the viscosity reaches 200-500 mPa·s at 25°C to obtain a silane coupling agent-modified furan resin. adding a bio-based toughening agent and a thermal curing agent to the silane coupling agent-modified furan resin, and mixing them uniformly to obtain a mixture; After the mixture was cooled to room temperature, a resin material was obtained.

9. Use of the resin material according to any one of claims 1 to 7 in 3D inkjet printing materials.

10. A 3D printed product, characterized in that: It is prepared using the resin material described in any one of claims 1 to 7.

Images