3D printing ceramic slurry with moisture-proof photosensitive resin and preparation method of 3D printing ceramic slurry

Abstract

The invention relates to the technical field of photosensitive resin and preparation thereof, in particular to 3D printing ceramic slurry with moisture-proof photosensitive resin and a preparation method of the 3D printing ceramic slurry, the 3D printing ceramic slurry comprises a hydrophobic monomer, the hydrophobic monomer comprises one or more of trimethylolpropane triacrylate, ethoxylated bisphenol A diacrylate and isobornyl methacrylate; the coating also comprises a diluting monomer, a photoinitiator, an auxiliary agent, a hydrophobic filler and ceramic powder. On one hand, by introducing the hydrophobic monomer, the moisture resistance of the photosensitive resin is remarkably improved, and the water absorption rate is reduced from the source; on the other hand, hydrophobic filler nano silicon dioxide is treated; nano silicon dioxide and a silane coupling agent are mixed and stirred to obtain modified silicon dioxide, so that the dispersity and hydrophobicity of the modified silicon dioxide in photosensitive resin slurry are enhanced. The surface wettability and dispersing performance of the ceramic powder are improved, powder agglomeration is reduced, and the uniformity of the slurry is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of photosensitive resin and preparation thereof, and in particular to a 3D printing ceramic slurry with moisture-proof photosensitive resin and a preparation method thereof. Background Art

[0002] As an important branch of advanced manufacturing technology, ceramic 3D printing technology has been widely used in aerospace, medical equipment, electronic packaging and chemical industries due to its ability to manufacture complex structures, high precision and high performance ceramic parts. However, the performance of photosensitive resin, a key material, directly affects the stability of the printing slurry and the quality of the printed ceramic products.

[0003] The main problem with the existing technology is insufficient moisture resistance: the monomers and fillers in traditional photosensitive resins are mostly highly hydrophilic and easily absorb water and swell in a high humidity environment. This water absorption behavior will cause the viscosity of the ceramic slurry to change, resulting in uneven flow and abnormal deposition during the printing process. In addition, water absorption will also weaken the mechanical strength and dimensional stability of the matrix after the photosensitive resin is cured, making it difficult for the final ceramic product to meet the actual application requirements.

[0004] Therefore, the development of 3D printing ceramic slurry with moisture-proof photosensitive resin and its preparation method has become an urgent problem to be solved. Summary of the invention

[0005] In view of this, the present invention provides a 3D printing ceramic slurry with moisture-proof photosensitive resin and a preparation method thereof to solve the existing technical problems.

[0006] To achieve the above object, the present invention adopts the following specific technical scheme: A 3D printing ceramic slurry with moisture-proof photosensitive resin, calculated by weight, comprises:

[0007] 30-60 parts of a hydrophobic monomer, wherein the hydrophobic monomer comprises one or more of trimethylolpropane triacrylate (TMPTA), ethoxylated bisphenol A diacrylate (EOEO-BA) or isobornyl methacrylate (IBOMA);

[0008] Dilute the monomer 10-30 parts;

[0009] 2-6 parts of photoinitiator;

[0010] 0.5-3 parts of additives;

[0011] 5-15 parts of hydrophobic filler;

[0012] Ceramic powder 40-70 parts.

[0013] Furthermore, the auxiliary agent includes an antioxidant and a dispersant.

[0014] Furthermore, the photoinitiator is 1-hydroxycyclohexyl phenyl ketone (Irgacure 184) or 2,4,6-trimethylbenzoyldiphenylphosphine oxide (TPO-L).

[0015] Furthermore, the hydrophobic monomer includes trimethylolpropane triacrylate (TMPTA), ethoxylated bisphenol A diacrylate (EOEO-BA) and isoborneol methacrylate (IBOMA), and the mass ratio of the three components is 1:1:3.

[0016] Furthermore, the diluent monomer includes one or more of 1,6-hexanediol diacrylate (HDDA) and styrene (St).

[0017] Furthermore, the diluent monomer includes 1,6-hexanediol diacrylate (HDDA) and styrene (St), and the mass ratio of the two components is 1:3 to 1:5.

[0018] A method for preparing a 3D printing ceramic slurry with a moisture-proof photosensitive resin comprises the following steps:

[0019] Step 1, modification of silicon dioxide:

[0020] Mixing and stirring nano-silica and a silane coupling agent to obtain modified silica;

[0021] Step 2: Pretreatment of ceramic powder:

[0022] Mixing and stirring the ceramic powder and the silane coupling agent to obtain pretreated ceramic powder;

[0023] Step 3: Preparation of base resin:

[0024] Adding a hydrophobic monomer and a diluent monomer into a stirrer and stirring to obtain a base resin;

[0025] Step 4: Addition of additives and photoinitiators:

[0026] adding a dispersant, an antioxidant and a photoinitiator to the base resin in sequence;

[0027] Step 5: Add filler and ceramic powder:

[0028] The modified silica and the pretreated ceramic powder are gradually added to the base resin and stirred to obtain a preliminary ceramic slurry;

[0029] Step 6: Degassing and filtration:

[0030] The preliminary ceramic slurry is then filtered to remove air bubbles from the interior.

[0031] Furthermore, in step 1, nano-silica and a silane coupling agent are mixed in a mass ratio of 1:0.05 and stirred at 60° C. for 1 to 2 hours to obtain modified silica.

[0032] Furthermore, in step 2, the ceramic powder and the silane coupling agent are mixed in a mass ratio of 1:0.02 to 1:0.1 and stirred at room temperature for 30 minutes.

[0033] Furthermore, in step 6, the preliminary photosensitive resin slurry is placed in a vacuum environment for degassing to remove internal bubbles; and then filtered through a 300-500 mesh sieve to obtain a finished product.

[0034] The present invention can achieve the following technical effects:

[0035] The invention introduces hydrophobic monomers (trimethylolpropane triacrylate (TMPTA), ethoxylated bisphenol A diacrylate (EOEO-BA)) to significantly improve the moisture resistance of photosensitive resin and reduce water absorption from the source; on the other hand, the hydrophobic filler nano-silicon dioxide is treated; the nano-silicon dioxide is mixed and stirred with a silane coupling agent to obtain modified silicon dioxide, so as to enhance its dispersibility and hydrophobicity in the photosensitive resin slurry. The surface wettability and dispersibility of ceramic powder are improved, the powder agglomeration is reduced, and the uniformity of the slurry is improved.

[0036] The present invention reduces the viscosity of the system by introducing diluent monomers: 1,6-hexanediol diacrylate (HDDA) and styrene (St), so that the slurry has fluidity suitable for 3D printing, and at the same time maintains good static stability by optimizing the ratio to prevent precipitation. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0038] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0039] Figure 1 The present invention is a flow chart of the method for preparing the ceramic slurry disclosed in the present invention. DETAILED DESCRIPTION

[0040] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and do not constitute a limitation of the present invention.

[0041] refer to Figure 1 , a 3D printing ceramic slurry with a moisture-proof photosensitive resin, characterized in that, by weight, it includes:

[0042] 30-60 parts of a hydrophobic monomer, wherein the hydrophobic monomer comprises one or more of trimethylolpropane triacrylate (TMPTA), ethoxylated bisphenol A diacrylate (EOEO-BA) or isobornyl methacrylate (IBOMA);

[0043] Dilute the monomer 10-30 parts,

[0044] 2-6 parts of photoinitiator,

[0045] 0.5-3 parts of additives,

[0046] 5-15 parts of hydrophobic filler, the hydrophobic filler is nano silicon dioxide (SiO 2 );

[0047] 40-70 parts of ceramic powder, the ceramic powder is alumina (Al 2 O 3 )、ZrO 2 ) and silicon nitride (Si 3 N 4 )

[0048] Furthermore, the auxiliary agent includes an antioxidant and a dispersant; wherein the antioxidant is antioxidant 1098, and the dispersant can be BYK-103, BYK-303 and a silane coupling agent.

[0049] Further, the photoinitiator includes 1-hydroxycyclohexyl phenyl ketone (Irgacure 184) or 2,4,6-trimethylbenzoyldiphenylphosphine oxide (TPO-L).

[0050] Furthermore, the hydrophobic monomer includes trimethylolpropane triacrylate (TMPTA), ethoxylated bisphenol A diacrylate (EOEO-BA), and isoborneol methacrylate (IBOMA), and the mass ratio of the three components is 1:1:3.

[0051] Further, the diluent monomer includes one or more of 1,6-hexanediol diacrylate (HDDA) and styrene (St).

[0052] Furthermore, the diluent monomer includes 1,6-hexanediol diacrylate (HDDA) and styrene (St), and the mass ratio of the two components is 1:3 to 1:5.

[0053] The main problem with the existing technology is its insufficient moisture resistance: the monomers and fillers in traditional photosensitive resins are mostly highly hydrophilic and easily absorb water and swell in an environment with high humidity.

[0054] Secondly, ceramic powder is difficult to disperse: In order to ensure the density and mechanical properties of the ceramic products after printing, a high proportion of ceramic powder (45vol%-55vol%) is often required to be added to the ceramic slurry. However, due to the high specific surface area and high surface energy of ceramic powder, its dispersibility in photosensitive resin is poor, and it is easy to agglomerate to form large particles or precipitation. This uneven dispersion will lead to internal structural defects (such as pores or cracks) in the printed parts, thereby reducing the quality of the products.

[0055] Finally, the ceramic slurry needs to have appropriate rheological properties to meet the requirements of the 3D printing process for fluidity and deposition. However, the addition of a high proportion of ceramic powder will significantly increase the viscosity of the slurry, affecting the coating and molding capabilities of the photosensitive resin. At the same time, too high a viscosity may cause poor material flow in the printing equipment, thereby affecting printing efficiency and accuracy.

[0056] In view of the above problems, the present invention introduces hydrophobic monomers (trimethylolpropane triacrylate (TMPTA), ethoxylated bisphenol A diacrylate (EOEO-BA)) to significantly improve the moisture resistance of photosensitive resin and reduce water absorption from the source; on the other hand, the hydrophobic filler nano-silica is treated; the nano-silica is mixed and stirred with a silane coupling agent to obtain modified silica to enhance its dispersibility and hydrophobicity in the photosensitive resin slurry. The surface wettability and dispersibility of ceramic powder are improved, the powder agglomeration is reduced, and the uniformity of the slurry is improved.

[0057] The present invention can reduce the curing shrinkage rate: the present invention introduces multifunctional monomers such as trimethylolpropane triacrylate (TMPTA) and ethoxylated bisphenol A diacrylate (EOEO-BA).

[0058] These multifunctional monomers have a higher cross-linking density and can form a more compact three-dimensional network structure during the curing process, thereby reducing the volume shrinkage during the curing process.

[0059] Diluting monomers, such as the difunctional monomer 1,6-hexanediol diacrylate (HDDA), can reduce volume shrinkage by controlling the degree of crosslinking, optimizing the curing kinetics, and reducing stress concentration.

[0060] The present invention can improve rheological properties: by adjusting the viscosity, shear thinning behavior and thixotropic properties of the photosensitive resin, the slurry can achieve smooth flow during the 3D printing process while having sufficient static stability to prevent sedimentation;

[0061] Specifically, the viscosity, shear thinning behavior and thixotropic properties are optimized by adjusting the following materials and proportions:

[0062] The present invention reduces the viscosity of the system by introducing diluent monomers: 1,6-hexanediol diacrylate (HDDA) and styrene (St), so that the slurry has fluidity suitable for 3D printing, and at the same time maintains good static stability by optimizing the ratio to prevent precipitation.

[0063] The invention modifies the hydrophobic filler by mixing and stirring nano-silica and a silane coupling agent to obtain modified silica; the modified silica provides thixotropy and enhances the shear thinning behavior of the system, so that the slurry flows easily during the printing process and has a higher viscosity in a static state to prevent sedimentation.

[0064] The present invention can improve the dispersibility of ceramic powder and filler in the system and prevent agglomeration by introducing a dispersant, thereby optimizing the rheological properties of the slurry.

[0065] A method for preparing a 3D printing ceramic slurry with a moisture-proof photosensitive resin comprises the following steps:

[0066] Step 1, modification of silicon dioxide:

[0067] The modified silica is obtained by mixing nano-silica and silane coupling agent at a mass ratio of 1:0.05 at 60°C for 1 to 2 hours. The modified silica is then dried for later use to enhance its dispersibility and hydrophobicity in the resin system.

[0068] Step 2: Pretreatment of ceramic powder:

[0069] The ceramic powder and the silane coupling agent are mixed in a mass ratio of 1:0.02 to 1:0.1, and stirred at room temperature for 30 minutes to obtain the treated ceramic powder; ensuring that the powder surface is uniformly modified to improve its compatibility with the photosensitive resin.

[0070] Step 3: Preparation of base resin:

[0071] The hydrophobic monomer and the diluent monomer are added into a stirrer and stirred at room temperature for 30 to 60 minutes to uniformly mix them to form a base resin.

[0072] Step 4: Addition of additives and photoinitiators:

[0073] Add dispersant, antioxidant and photoinitiator to the base resin in sequence and continue stirring for 20 to 30 minutes to ensure that the ingredients are fully dispersed.

[0074] Step 5: Add filler and ceramic powder:

[0075] The modified silica and the treated ceramic powder are gradually added to the base resin, and stirred at a high speed in a ball mill for 30 to 60 minutes to ensure that the filler and the ceramic powder are evenly dispersed in the system to obtain a preliminary photosensitive resin slurry.

[0076] Step 6: Degassing and filtration:

[0077] The preliminary photosensitive resin slurry is degassed in a vacuum environment to remove internal bubbles; and then filtered through a 300-500 mesh screen to obtain a final photosensitive resin slurry.

[0078] Example 1

[0079] In the first aspect of this example, a 3D printing ceramic slurry with a moisture-proof photosensitive resin is provided, and the raw materials for preparation are calculated by weight:

[0080] Hydrophobic monomer: trimethylol acrylate (TMPTA): 6 parts; isoborneol methacrylate (IBOMA): 6 parts; isoborneol methacrylate (IBOMA): 18 parts;

[0081] Diluent monomer: 1,6-hexanediol diacrylate (HDDA): 2.5 parts; Styrene (St): 7.5 parts;

[0082] Photoinitiator: 1-hydroxycyclohexylphenyl ketone (Irgacure 184): 4 parts;

[0083] Hydrophobic filler: nano silicon dioxide: 5 parts;

[0084] Additives: The antioxidant is antioxidant 1010: 0.5 parts, the dispersant is BYK-103: 1 parts; the dispersant can also be BYK-303 and silane coupling agent.

[0085] Ceramic powder: Alumina (Al 2 O 3 ): 70 copies;

[0086] The second aspect of this example provides a method for preparing a 3D printing ceramic slurry with a moisture-proof photosensitive resin, wherein the above components are weighed according to the above mass fractions of this embodiment; and the method is implemented according to the following steps:

[0087] Step 1, modification of silicon dioxide: nano silicon dioxide and silane coupling agent are mixed in a mass ratio of 1:0.05, and stirred at 60° C. for 1 to 2 hours to obtain modified silicon dioxide.

[0088] Step 2: Pretreatment of ceramic powder: 2 O 2 ) powder and silane coupling agent are mixed in a mass ratio of 1:0.02, stirred at room temperature for 30 minutes, to obtain treated ceramic powder; ensuring that the powder surface is uniformly modified to improve its compatibility with the photosensitive resin.

[0089] Step 3, base resin preparation: add 6 parts of hydrophobic monomer trimethylolacrylate (TMPTA); 6 parts of isoborneol methacrylate (IBOMA); 18 parts of isoborneol methacrylate (IBOMA); and diluent monomer: 2.5 parts of 1,6-hexanediol diacrylate (HDDA); 7.5 parts of styrene (St) into a stirrer, stir at room temperature for 30 to 60 minutes to mix them evenly to form a base resin.

[0090] Step 4, adding additives and photoinitiators: add dispersant BYK-103: 1 part, antioxidant 1010: 0.5 parts, and photoinitiator 1-hydroxycyclohexyl phenyl ketone (Irgacure184): 4 parts to the base resin in sequence; continue stirring for 20 to 30 minutes to ensure that the ingredients are fully dispersed.

[0091] Step 5, adding fillers and ceramic powders: gradually add modified silica and treated ceramic powders into the base resin, keep stirring at high speed in a ball mill for 30 to 60 minutes to ensure that the fillers and ceramic powders are evenly dispersed in the system to obtain a preliminary photosensitive resin slurry.

[0092] Step 6, degassing and filtering: degas the preliminary photosensitive resin slurry in a vacuum environment to remove internal bubbles; then filter through a 300-500 mesh sieve to obtain the final photosensitive resin slurry.

[0093] Performance parameters

[0094] Viscosity (25°C): 900mPa·s

[0095] Water absorption (24 hours): 0.13%

[0096] Shrinkage (after curing): 1.2%

[0097] Curing time (405nm light source, 5 seconds): qualified

[0098] Rheological properties: Suitable for 3D printer operation requirements, no obvious precipitation during printing.

[0099] Example 2

[0100] In the first aspect of this example, a 3D printing ceramic slurry with a moisture-proof photosensitive resin is provided, and the raw materials for preparation are calculated by weight:

[0101] Hydrophobic monomer: trimethylol acrylate (TMPTA): 12 parts; isoborneol methacrylate (IBOMA): 12 parts; isoborneol methacrylate (IBOMA): 36 parts;

[0102] Diluent monomer: 1,6-hexanediol diacrylate (HDDA): 3 parts; styrene (St): 15 parts;

[0103] Photoinitiator: 2,4,6-trimethylbenzoyldiphenylphosphine oxide (TPO-L): 2 parts;

[0104] Hydrophobic filler: nano silicon dioxide: 8 parts;

[0105] Additives: Antioxidant 1010: 0.5 parts, dispersant BYK-303: 2 parts.

[0106] Ceramic powder: The ceramic powder is zirconium oxide (ZrO 2 ): 55 copies.

[0107] The second aspect of this example provides a method for preparing a 3D printing ceramic slurry with a moisture-proof photosensitive resin, wherein the above components are weighed according to the above mass fractions of this embodiment; and the method is implemented according to the following steps:

[0108] Step 1, modification of silicon dioxide: nano silicon dioxide and silane coupling agent are mixed in a mass ratio of 1:0.05, and stirred at 60° C. for 1 to 2 hours to obtain modified silicon dioxide.

[0109] Step 2: Pretreatment of ceramic powder: Zirconia (ZrO 2 ) powder and silane coupling agent are mixed in a mass ratio of 1:0.1, stirred at room temperature for 30 minutes, and treated ceramic powder is obtained; ensuring that the powder surface is uniformly modified to improve its compatibility with the photosensitive resin.

[0110] Step 3, base resin preparation: add hydrophobic monomer trihydroxymethylacrylate (TMPTA): 12 parts; isoborneol methacrylate (IBOMA): 12 parts; isoborneol methacrylate (IBOMA): 36 parts; and diluent monomer: 1,6-hexanediol diacrylate (HDDA): 3 parts; styrene (St): 15 parts into a stirrer, stir at room temperature for 30 to 60 minutes to mix them evenly to form a base resin.

[0111] Step 4, adding additives and photoinitiators: add 2 parts of dispersant BYK-303, 0.5 parts of antioxidant 1010, and 2 parts of 2,4,6-trimethylbenzoyldiphenylphosphine oxide (TPO-L) to the base resin in sequence; continue stirring for 20 to 30 minutes to ensure that the ingredients are fully dispersed.

[0112] Step 5, adding fillers and ceramic powders: gradually add modified silica and treated ceramic powders into the base resin, keep stirring at high speed in a ball mill for 30 to 60 minutes to ensure that the fillers and ceramic powders are evenly dispersed in the system to obtain a preliminary photosensitive resin slurry.

[0113] Step 6, degassing and filtering: degas the preliminary photosensitive resin slurry in a vacuum environment to remove internal bubbles; then filter through a 300-500 mesh sieve to obtain the final photosensitive resin slurry.

[0114] Performance parameters

[0115] Viscosity (25°C): 900mPa·s

[0116] Water absorption (24 hours): 0.22%

[0117] Shrinkage (after curing): 1.6%

[0118] Curing time (405nm light source, 4 seconds): qualified

[0119] Rheological properties: suitable for printing with high ceramic powder ratio (ceramic powder content 55%), good fluidity and sedimentation stability.

[0120] Example 3

[0121] In the first aspect of this example, a 3D printing ceramic slurry with a moisture-proof photosensitive resin is provided, and the raw materials for preparation are calculated by weight:

[0122] Hydrophobic Monomer:

[0123] Trimethylol acrylate (TMPTA): 9 parts; Isoborneol methacrylate (IBOMA): 9 parts; Isoborneol methacrylate (IBOMA): 27 parts;

[0124] Diluent monomer: 1,6-hexanediol diacrylate (HDDA): 6 parts; styrene (St): 24 parts;

[0125] Photoinitiator: 1-hydroxycyclohexylphenyl ketone (Irgacure 184): 6 parts;

[0126] Hydrophobic filler: nano silicon dioxide: 15 parts;

[0127] Additives: Antioxidant 1010: 0.3 parts; Dispersant BYK-303: 1 parts;

[0128] Ceramic powder: Silicon nitride (Si 3 N 4 )40 copies.

[0129] The second aspect of this example provides a method for preparing a 3D printing ceramic slurry with a moisture-proof photosensitive resin, wherein the above components are weighed according to the above mass fractions of this embodiment; and the method is implemented according to the following steps:

[0130] Step 1, modification of silicon dioxide: nano silicon dioxide and silane coupling agent are mixed in a mass ratio of 1:0.05, and stirred at 60° C. for 1 to 2 hours to obtain modified silicon dioxide.

[0131] Step 2: Pretreatment of ceramic powder: Silicon nitride (Si 3 N 4 ) powder and silane coupling agent are mixed in a mass ratio of 1:0.02, stirred at room temperature for 30 minutes, to obtain treated ceramic powder; ensuring that the powder surface is uniformly modified to improve its compatibility with the photosensitive resin.

[0132] Step 3, base resin preparation: add hydrophobic monomer trihydroxymethylacrylate (TMPTA): 9 parts; isoborneol methacrylate (IBOMA): 9 parts; isoborneol methacrylate (IBOMA): 27 parts; and diluent monomer: 1,6-hexanediol diacrylate (HDDA): 6 parts; styrene (St): 24 parts into a stirrer, stir at room temperature for 30 to 60 minutes to mix them evenly to form a base resin.

[0133] Step 4, adding additives and photoinitiators: add dispersant BYK-303: 1 part; antioxidant 1010: 0.3 parts; and photoinitiator 1-hydroxycyclohexyl phenyl ketone (Irgacure184): 6 parts to the base resin in sequence; continue stirring for 20 to 30 minutes to ensure that the ingredients are fully dispersed.

[0134] Step 5, adding fillers and ceramic powders: gradually add modified silica and treated ceramic powders into the base resin, keep stirring at high speed in a ball mill for 30 to 60 minutes to ensure that the fillers and ceramic powders are evenly dispersed in the system to obtain a preliminary photosensitive resin slurry.

[0135] Step 6, degassing and filtering: degas the preliminary photosensitive resin slurry in a vacuum environment to remove internal bubbles; then filter through a 300-500 mesh sieve to obtain the final photosensitive resin slurry.

[0136] Performance parameters:

[0137] Viscosity (25°C): 700 mPa·s

[0138] Water absorption (24 hours): 0.2%

[0139] Shrinkage (after curing): 1.9%

[0140] Curing time (405nm light source, 4 seconds): qualified

[0141] Rheological properties: Suitable for 3D printing slurries with a high ceramic powder content (50%), showing good sedimentation stability and layer-by-layer adhesion during printing.

[0142] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0143] Although the embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and cannot be understood as limiting the present invention. Those skilled in the art may change, modify, replace and modify the above embodiments within the scope of the present invention.

[0144] The above specific implementations of the present invention do not constitute a limitation on the protection scope of the present invention. Any other corresponding changes and modifications made based on the technical concept of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A 3D printing ceramic slurry with moisture-proof photosensitive resin, characterized in that: Calculated by mass, including: 30-60 parts of a hydrophobic monomer, wherein the hydrophobic monomer comprises one or more of trimethylolpropane triacrylate (TMPTA), ethoxylated bisphenol A diacrylate (EOEO-BA), and isobornyl methacrylate (IBOMA); Dilute the monomer 10-30 parts; 2-6 parts of photoinitiator; 0.5-3 parts of additives; 5-15 parts of hydrophobic filler; Ceramic powder 40-70 parts.

2. The 3D printing ceramic slurry with moisture-proof photosensitive resin according to claim 1, characterized in that: The auxiliary agents include antioxidants and dispersants.

3. The 3D printing ceramic slurry with moisture-proof photosensitive resin according to claim 2, characterized in that: The photoinitiator is 1-hydroxycyclohexyl phenyl ketone (Irgacure 184) or 2,4,6-trimethylbenzoyldiphenylphosphine oxide (TPO-L).

4. The 3D printing ceramic slurry with moisture-proof photosensitive resin according to claim 3, characterized in that: The hydrophobic monomer includes trimethylolpropane triacrylate (TMPTA), ethoxylated bisphenol A diacrylate (EOEO-BA) and isobornyl methacrylate (IBOMA), and the mass ratio of the three components is 1:1:

3.

5. The 3D printing ceramic slurry with moisture-proof photosensitive resin according to claim 2, characterized in that: The diluent monomer includes one or more of 1,6-hexanediol diacrylate (HDDA) and styrene (St).

6. The 3D printing ceramic slurry with moisture-proof photosensitive resin according to claim 5, characterized in that: The diluent monomer includes 1,6-hexanediol diacrylate (HDDA) and styrene (St), and the mass ratio of the two components is 1:3 to 1:

5.

7. A method for preparing a 3D printing ceramic slurry with a moisture-proof photosensitive resin, characterized in that: The following steps are involved: Step 1, modification of silicon dioxide: Mixing and stirring nano-silica and a silane coupling agent to obtain modified silica; Step 2: Pretreatment of ceramic powder: Mixing and stirring the ceramic powder and the silane coupling agent to obtain pretreated ceramic powder; Step 3: Preparation of base resin: Adding a hydrophobic monomer and a diluent monomer into a stirrer and stirring to obtain a base resin; Step 4: Addition of additives and photoinitiators: adding a dispersant, an antioxidant and a photoinitiator to the base resin in sequence; Step 5: Add filler and ceramic powder: The modified silica and the pretreated ceramic powder are gradually added to the base resin and stirred to obtain a preliminary ceramic slurry; Step 6: Degassing and filtration: The preliminary ceramic slurry is then filtered to remove air bubbles from the interior.

8. The method for preparing the 3D printing ceramic slurry with moisture-proof photosensitive resin according to claim 7, characterized in that: In step 1, nano-silica and a silane coupling agent are mixed in a mass ratio of 1:0.05, and stirred at 60° C. for 1 to 2 hours to obtain modified silica.

9. The method for preparing a 3D printing ceramic slurry with a moisture-proof photosensitive resin according to claim 8, characterized in that: In step 2, the ceramic powder and the silane coupling agent are mixed in a mass ratio of 1:0.02 to 1:0.1, and stirred at room temperature for 30 minutes.

10. The method for preparing a 3D printing ceramic slurry with a moisture-proof photosensitive resin according to claim 9, characterized in that: In step 6, the preliminary photosensitive resin slurry is placed in a vacuum environment for degassing to remove internal bubbles; and then filtered through a 300-500 mesh sieve to obtain a finished product.

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