CN115745554B - Gypsum-based thermally-induced retarding 3D printing material and preparation and use methods thereof - Google Patents
Gypsum-based thermally-induced retarding 3D printing material and preparation and use methods thereof Download PDFInfo
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- 229910052602 gypsum Inorganic materials 0.000 title claims abstract description 97
- 239000010440 gypsum Substances 0.000 title claims abstract description 97
- 238000010146 3D printing Methods 0.000 title claims abstract description 87
- 239000000463 material Substances 0.000 title claims abstract description 84
- 230000000979 retarding effect Effects 0.000 title claims abstract description 51
- 238000000034 method Methods 0.000 title claims abstract description 19
- 238000002360 preparation method Methods 0.000 title claims abstract description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 41
- 238000007639 printing Methods 0.000 claims abstract description 26
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 21
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 8
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- 239000006254 rheological additive Substances 0.000 claims abstract description 6
- 239000003607 modifier Substances 0.000 claims abstract description 5
- 238000002156 mixing Methods 0.000 claims description 25
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims description 20
- 239000000843 powder Substances 0.000 claims description 20
- 238000004321 preservation Methods 0.000 claims description 20
- 238000003756 stirring Methods 0.000 claims description 20
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims description 16
- 229920005646 polycarboxylate Polymers 0.000 claims description 16
- 229920002472 Starch Polymers 0.000 claims description 12
- 239000008107 starch Substances 0.000 claims description 12
- 235000019698 starch Nutrition 0.000 claims description 12
- 229960000892 attapulgite Drugs 0.000 claims description 11
- 229910052625 palygorskite Inorganic materials 0.000 claims description 11
- 238000004519 manufacturing process Methods 0.000 claims description 9
- 239000011780 sodium chloride Substances 0.000 claims description 8
- 239000001866 hydroxypropyl methyl cellulose Substances 0.000 claims description 7
- 235000010979 hydroxypropyl methyl cellulose Nutrition 0.000 claims description 7
- 229920003088 hydroxypropyl methyl cellulose Polymers 0.000 claims description 7
- UFVKGYZPFZQRLF-UHFFFAOYSA-N hydroxypropyl methyl cellulose Chemical compound OC1C(O)C(OC)OC(CO)C1OC1C(O)C(O)C(OC2C(C(O)C(OC3C(C(O)C(O)C(CO)O3)O)C(CO)O2)O)C(CO)O1 UFVKGYZPFZQRLF-UHFFFAOYSA-N 0.000 claims description 7
- 239000004115 Sodium Silicate Substances 0.000 claims description 6
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 claims description 6
- WBHQBSYUUJJSRZ-UHFFFAOYSA-M sodium bisulfate Chemical compound [Na+].OS([O-])(=O)=O WBHQBSYUUJJSRZ-UHFFFAOYSA-M 0.000 claims description 6
- 229910000342 sodium bisulfate Inorganic materials 0.000 claims description 6
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims description 6
- 229910052911 sodium silicate Inorganic materials 0.000 claims description 6
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- 235000011152 sodium sulphate Nutrition 0.000 claims description 6
- 239000002245 particle Substances 0.000 claims description 3
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- 235000019425 dextrin Nutrition 0.000 claims description 2
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- 238000012360 testing method Methods 0.000 abstract description 7
- 230000002035 prolonged effect Effects 0.000 abstract description 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 30
- 230000000052 comparative effect Effects 0.000 description 19
- 239000005543 nano-size silicon particle Substances 0.000 description 15
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- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 description 3
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- 150000004683 dihydrates Chemical class 0.000 description 1
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Landscapes
- Producing Shaped Articles From Materials (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention belongs to the technical field of 3D printing, and discloses a gypsum-based thermally-induced retarding 3D printing material and a preparation and use method thereof. The gypsum-based thermally-induced retarding 3D printing material comprises a component A and a component B, wherein the component A comprises the following raw materials in parts by mass: 100 parts of gypsum, 0-3 parts of exciting agent, 0.1-5 parts of rheological modifier and 0.01-3 parts of thixotropic modifier; the component B comprises the following raw materials in parts by weight: 30-60 parts of water and 0.01-3 parts of water reducer; the mass ratio of the component A to the component B is 100: (27-63). The gypsum-based thermally-induced retarding 3D printing material is preheated and insulated during preparation and use, and the setting time can be prolonged to 4-11 hours, so that the printing time is sufficient, after printing, a printing test piece is naturally cooled, and the printing test piece can be rapidly molded and has strength, so that the layer-by-layer 3D printing is ensured.
Description
Technical Field
The invention belongs to the technical field of 3D printing, and particularly relates to a gypsum-based thermally-induced retarding 3D printing material and a preparation and use method thereof.
Background
3D prints and is one kind of quick fashioned, also known as additive manufacturing, not only can save manpower and materials in a large number, improves production efficiency, can also carry out accurate printing to the part of shape complicacy. 3D printing technology development has been 30 years old so far, and is widely applied to the fields of automobiles, buildings, medical treatment, electronics, aerospace and the like. Currently, the development of 3D printing is still limited by the types of 3D printing materials, and common 3D printing materials include thermoplastic plastics, metal powder, ceramic powder, gypsum materials and the like. The gypsum product and the cementing material have the advantages of excellent performances, rich raw material sources, low production energy consumption and the like, so that the gypsum product and the cementing material have market potential.
At present, 3D printing of gypsum cementing materials is carried out by adopting pre-mixed gypsum slurry, but because the setting time of gypsum is short, sodium polyphosphate, citric acid, plant protein retarders and the like are usually required to be added, the incorporation of the retarders can negatively affect the strength of gypsum products, and the larger the incorporation amount is, the more obvious the negative effect is. In addition, the common retarder generally has a retarding effect on gypsum of only 1-2 hours, and a 3D printing product with a longer printing period needs to be pulped for a small amount of times, so that the problems that gypsum coagulation cannot be continuously printed and printing equipment is blocked are avoided, and the printing procedure is complicated.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides the gypsum-based thermally-induced retarding 3D printing material and the preparation and use methods thereof, wherein the printing material is preheated and insulated during preparation and use, can prolong the printable time, can be naturally cooled after printing, can be rapidly molded and can generate strength.
In order to solve the technical problem, the invention provides a gypsum-based thermally-induced retarding 3D printing material, which comprises a component A and a component B, wherein the component A comprises the following raw materials in parts by weight: 100 parts of gypsum, 0-3 parts of exciting agent, 0.1-5 parts of rheological modifier and 0.01-3 parts of thixotropic modifier; the component B comprises the following raw materials in parts by weight: 30-60 parts of water and 0.01-3 parts of water reducer; the mass ratio of the component A to the component B is 100: (27-63).
In the scheme, the gypsum is high-strength gypsum powder.
In the scheme, the exciting agent is one or more of sodium sulfate, sodium bisulfate, sodium silicate and sodium chloride.
In the above scheme, the rheology modifier is one or more of hydrophilic gas phase nano silicon dioxide, soluble starch, hydroxypropyl methyl cellulose and dextrin.
Further, the particle size of the hydrophilic gas phase nano silicon dioxide is 7-40nm.
In the scheme, the thixotropic modifier is one or more of attapulgite, starch ether and polyamide powder.
In the scheme, the water reducer is a polycarboxylic acid water reducer.
The invention also provides a preparation and use method of the gypsum-based thermally-induced retarding 3D printing material, which comprises the following steps:
1) Uniformly mixing gypsum, an exciting agent, a rheology modifier and a thixotropic modifier to obtain a component A;
2) Uniformly mixing water and a water reducing agent to obtain a component B;
3) Before use, preheating the component A and the component B, and uniformly stirring after mixing according to the mass ratio under the condition of heat preservation to obtain a gypsum-based thermally-induced retarding 3D printing material;
4) When the gypsum-based thermal retarding 3D printing material is used, the thermal insulation state of the gypsum-based thermal retarding 3D printing material is maintained before printing, and the gypsum-based thermal retarding 3D printing material is naturally cooled and molded after printing.
In the scheme, the temperature of preheating and heat preservation is 50-85 ℃.
In the scheme, the stirring speed is 100-250 r/min, and the stirring time is 2-5 min.
Compared with the prior art, the invention has the beneficial effects that:
according to the invention, the components and the temperature of the gypsum-based thermally-induced retarding 3D printing material are regulated, so that the setting time of the gypsum cementing material in the 3D printing process is flexibly controlled. The 3D printing material is kept at a certain preheating temperature before printing, so that on one hand, the solubility of alpha-hemihydrate gypsum is reduced, and the hydration rate is delayed; on the other hand, with the participation of polycarboxylate water reducer, ca in gypsum slurry 2+ Chelating with carboxyl to form precipitate attached to the surface of alpha-semi-hydrated gypsum, so as to reduce the supersaturation degree of the dihydrate gypsum and prolong the coagulation time; the high temperature and the polycarboxylate water reducer have synergistic effect on prolonging the hydration and setting time, so that the hydration and setting time of the gypsum cementing material can be prolonged to 4-11 h, and the printable time of the 3D printing material is prolonged. After printing, the retarding effect is rapidly reduced along with the reduction of the temperature of a printed test piece, and the rapid solidification and strength generation can be ensured under the action of an exciting agent.
Drawings
Fig. 1 is a schematic structural diagram of a 3D printhead according to an embodiment of the present invention.
In the figure: 1-a rubber cushion block; 2-a stepper motor; 3-a spring; 4-motor end caps; 5-a water outlet; 6-a transmission shaft; 7-stirring blades; 8-a feed inlet; 9-a double-layer stirring cylinder; 10-a water inlet; 11-pipe plug; 12-extruding a screw; 13-an electrothermal coil; 14-electromagnetic cylinder.
Detailed Description
For a better understanding of the present invention, the following examples are further illustrated, but are not limited to the following examples.
In the following examples, the gypsum used was high-strength gypsum powder; the particle size of the hydrophilic gas phase nano silicon dioxide is 7-40nm; the soluble starch used is analytically pure; the viscosity of the adopted hydroxypropyl methylcellulose is 60000 Pa.s; the attapulgite is a Pasteur Attagel 50 thixotropic thickener in Germany; the starch ether is hydroxypropyl starch ether; the water reducer is WH-A (Standard) polycarboxylate water reducer powder of Tianjin Weihe technology development Co., ltd.
In the following embodiments, the adopted 3D printing head is a heat-preserving stirring extrusion integrated device, the structural schematic diagram is shown in fig. 1, the double-layer stirring cylinder 9 is filled with circulating liquid, when in use, the circulating liquid is heated to a certain temperature, and the circulating liquid is pumped by connecting the water inlet 10 and the water outlet 5, so that the double-layer stirring cylinder 9 maintains a certain temperature; preheating a component A and a component B of the gypsum-based thermal retardation 3D printing material, sequentially adding the components A and the component B into a double-layer stirring cylinder 9 from a feed inlet 8, and stirring and mixing the gypsum-based thermal retardation 3D printing material by externally connecting a stirring signal with a stepping motor 2; after printing, the gypsum-based thermal retardation 3D printing material is extruded through the bottom of the printing head, an electromagnetic cylinder 14 and an electric heating coil 13 are additionally arranged at the bottom of the printing head, an alternating electromagnetic field is formed between the electromagnetic cylinders after the electric heating coil is electrified, and the phenomenon of electromagnetic induction heating causes no coagulation to cause blockage in the extrusion process of the gypsum-based thermal retardation 3D printing material, so that the gypsum-based thermal retardation 3D printing material is rapidly coagulated and generates strength under the combined action of natural cooling and an exciting agent after being extruded from a printing nozzle, and the layer-by-layer of 3D printing is ensured.
Example 1
The gypsum-based thermally-induced retarding 3D printing material comprises a component A and a component B, wherein the component A comprises the following raw materials in parts by weight: 100 parts of high-strength gypsum powder, 0.5 part of sodium sulfate, 1 part of hydrophilic gas phase nano silicon dioxide and 2 parts of attapulgite; the component B comprises the following raw materials in parts by weight: 45 parts of water and 0.2 part of polycarboxylate water reducer; the mass ratio of the component A to the component B is 100:43.67.
the preparation and application method of the gypsum-based thermally-induced retarding 3D printing material comprises the following steps:
1) Uniformly mixing high-strength gypsum powder, sodium sulfate, hydrophilic gas phase nano silicon dioxide and attapulgite to obtain a component A;
2) Uniformly mixing water and a polycarboxylate superplasticizer to obtain a component B;
3) Preheating the component A and the component B to 70 ℃, putting into a 3D printing head shown in figure 1, and stirring and mixing for 3min at a speed of 200r/min under the condition of heat preservation to obtain a gypsum-based thermally-induced retarding 3D printing material;
4) And (3) maintaining the gypsum-based thermally-induced retarding 3D printing material in a heat preservation state before printing, extruding the material through a 3D printing head, and naturally cooling and forming the material.
Example 2
The gypsum-based thermally-induced retarding 3D printing material comprises a component A and a component B, wherein the component A comprises the following raw materials in parts by weight: 100 parts of high-strength gypsum powder, 0.2 part of sodium bisulfate, 0.2 part of sodium silicate, 2 parts of soluble starch, 0.4 part of hydrophilic gas phase nano silicon dioxide and 3 parts of attapulgite; the component B comprises the following raw materials in parts by weight: 45 parts of water and 0.4 part of polycarboxylate water reducer; the mass ratio of the component A to the component B is 100:42.91.
the preparation and application method of the gypsum-based thermally-induced retarding 3D printing material comprises the following steps:
1) Uniformly mixing high-strength gypsum powder, sodium bisulfate, sodium silicate, soluble starch, hydrophilic gas phase nano silicon dioxide and attapulgite to obtain a component A;
2) Uniformly mixing water and a polycarboxylate superplasticizer to obtain a component B;
3) Preheating the component A and the component B to 85 ℃, putting into a 3D printing head shown in the figure 1, and stirring and mixing for 2min at the speed of 250r/min under the condition of heat preservation to obtain a gypsum-based thermally-induced retarding 3D printing material;
4) And (3) maintaining the gypsum-based thermally-induced retarding 3D printing material in a heat preservation state before printing, extruding the material through a 3D printing head, and naturally cooling and forming the material.
Example 3
The gypsum-based thermally-induced retarding 3D printing material comprises a component A and a component B, wherein the component A comprises the following raw materials in parts by weight: 100 parts of high-strength gypsum powder, 0.1 part of sodium chloride, 1 part of soluble starch, 0.4 part of hydrophilic gas phase nano silicon dioxide, 0.2 part of hydroxypropyl methyl cellulose and 0.03 part of hydroxypropyl starch ether; the component B comprises the following raw materials in parts by weight: 40 parts of water and 2 parts of polycarboxylate water reducer; the mass ratio of the component A to the component B is 100:41.30.
the preparation and application method of the gypsum-based thermally-induced retarding 3D printing material comprises the following steps:
1) Uniformly mixing high-strength gypsum powder, sodium chloride, soluble starch, hydrophilic gas phase nano silicon dioxide, hydroxypropyl methyl cellulose and hydroxypropyl starch ether to obtain a component A;
2) Uniformly mixing water and a polycarboxylate superplasticizer to obtain a component B;
3) Preheating the component A and the component B to 65 ℃, putting into a 3D printing head shown in the figure 1, and stirring and mixing for 5min at a speed of 100r/min under the condition of heat preservation to obtain a gypsum-based thermally-induced retarding 3D printing material;
4) And (3) maintaining the gypsum-based thermally-induced retarding 3D printing material in a heat preservation state before printing, extruding the material through a 3D printing head, and naturally cooling and forming the material.
Example 4
The gypsum-based thermally-induced retarding 3D printing material comprises a component A and a component B, wherein the component A comprises the following raw materials in parts by weight: 100 parts of high-strength gypsum powder, 1 part of hydrophilic gas phase nano silicon dioxide, 0.6 part of hydroxypropyl methyl cellulose and 0.1 part of hydroxypropyl starch ether; the component B comprises the following raw materials in parts by weight: 45 parts of water and 2.5 parts of polycarboxylate superplasticizer; the mass ratio of the component A to the component B is 100:46.41.
the preparation and application method of the gypsum-based thermally-induced retarding 3D printing material comprises the following steps:
1) Uniformly mixing high-strength gypsum powder, hydrophilic gas phase nano silicon dioxide, hydroxypropyl methylcellulose and hydroxypropyl starch ether to obtain a component A;
2) Uniformly mixing water and a polycarboxylate superplasticizer to obtain a component B;
3) Preheating the component A and the component B to 55 ℃, putting into a 3D printing head shown in the figure 1, and stirring and mixing for 3min at a speed of 150r/min under the condition of heat preservation to obtain a gypsum-based thermally-induced retarding 3D printing material;
4) And (3) maintaining the gypsum-based thermally-induced retarding 3D printing material in a heat preservation state before printing, extruding the material through a 3D printing head, and naturally cooling and forming the material.
Example 5
The gypsum-based thermally-induced retarding 3D printing material comprises a component A and a component B, wherein the component A comprises the following raw materials in parts by weight: 100 parts of high-strength gypsum powder, 1.5 parts of sodium chloride, 0.2 part of sodium sulfate, 1.5 parts of hydrophilic gas phase nano silicon dioxide, 0.01 part of hydroxypropyl starch ether and 2.5 parts of attapulgite; the component B comprises the following raw materials in parts by weight: 45 parts of water and 1.5 parts of polycarboxylate water reducer; the mass ratio of the component A to the component B is 100:43.99.
the preparation and application method of the gypsum-based thermally-induced retarding 3D printing material comprises the following steps:
1) Uniformly mixing high-strength gypsum powder, sodium chloride, sodium sulfate, hydrophilic gas phase nano silicon dioxide, hydroxypropyl starch ether and attapulgite to obtain a component A;
2) Uniformly mixing water and a polycarboxylate superplasticizer to obtain a component B;
3) Preheating the component A and the component B to 80 ℃, putting into a 3D printing head shown in the figure 1, and stirring and mixing for 3min at a speed of 200r/min under the condition of heat preservation to obtain a gypsum-based thermally-induced retarding 3D printing material;
4) And (3) maintaining the gypsum-based thermally-induced retarding 3D printing material in a heat preservation state before printing, extruding the material through a 3D printing head, and naturally cooling and forming the material.
Example 6
The gypsum-based thermally-induced retarding 3D printing material comprises a component A and a component B, wherein the component A comprises the following raw materials in parts by weight: 100 parts of high-strength gypsum powder, 1 part of sodium chloride, 0.4 part of sodium bisulfate, 0.5 part of sodium silicate, 2 parts of hydrophilic gas phase nano silicon dioxide, 2 parts of soluble starch and 3 parts of attapulgite; the component B comprises the following raw materials in parts by weight: 50 parts of water and 2.5 parts of polycarboxylate superplasticizer; the mass ratio of the component A to the component B is 100:48.17.
the preparation and application method of the gypsum-based thermally-induced retarding 3D printing material comprises the following steps:
1) Uniformly mixing high-strength gypsum powder, sodium chloride, sodium bisulfate, sodium silicate, hydrophilic gas phase nano silicon dioxide, soluble starch and attapulgite to obtain a component A;
2) Uniformly mixing water and a polycarboxylate superplasticizer to obtain a component B;
3) Preheating the component A and the component B to 75 ℃, putting into a 3D printing head shown in the figure 1, and stirring and mixing for 3min at a speed of 200r/min under the condition of heat preservation to obtain a gypsum-based thermally-induced retarding 3D printing material;
4) And (3) maintaining the gypsum-based thermally-induced retarding 3D printing material in a heat preservation state before printing, extruding the material through a 3D printing head, and naturally cooling and forming the material.
Comparative example 1
Comparative example 1 differs from example 1 only in that: no water reducing agent was used.
Comparative example 2
Comparative example 2 differs from example 1 only in that: no preheating and no incubation were performed, room temperature was 25 ℃.
Comparative example 3
Comparative example 3 differs from example 1 only in that: no water reducer was used and no preheating and heat preservation were performed, room temperature being 25 ℃.
The 3D printing materials of examples 1-4 and comparative examples 1-3 were tested for setting time by the needle sinking method, which comprises the following specific steps: placing the round mould in a heat preservation tank, pouring the prepared 3D printing material into the round mould, vibrating for a plurality of times to be scraped, adjusting the test needle to enable the test needle to be in contact with the slurry surface, suddenly loosening to enable the test needle to freely sink into the slurry, recording the setting time of gypsum if the test needle is sunk into the gypsum slurry and is 0.5-1 mm away from the bottom, and the result is shown in table 1.
TABLE 1
| Group of | Temperature (temperature) | Coagulation time |
| Example 1 | 70℃ | 392min |
| Example 2 | 85℃ | 675min |
| Example 3 | 65℃ | 334min |
| Example 4 | 55℃ | 231min |
| Comparative example 1 | 70℃ | 6min |
| Comparative example 2 | 25℃ | 21min |
| Comparative example 3 | 25℃ | 11min |
From the data of comparative examples 2 and 3, it is found that the setting time of comparative example 2 added with the water reducer is prolonged by 10 minutes compared with comparative example 3, which shows that the water reducer has a certain retarding effect on gypsum, but the retarding effect is not obvious; from the data of comparative examples 1 and 3, it was found that the setting time of comparative example 1, in which preheating and heat preservation were performed, was shortened by 5 minutes as compared with comparative example 3, and although the high temperature could delay the hydration of gypsum to achieve the retarding effect, the high temperature also enhanced the accelerating effect of the activator, and the accelerating effect was stronger than the retarding effect, so that the retarding effect could not be achieved; from the data of example 1 and comparative example 3, it was found that when the water reducing agent and the warm-up and heat preservation were simultaneously applied, the setting time was prolonged by 381min as compared with comparative example 3, indicating that the two produced a significant synergistic effect, resulting in a significant increase in setting time.
Furthermore, from the data of example 1 and comparative example 2, it was found that when the temperature of the 3D printing material was reduced from 70 ℃ to room temperature, the setting time was shortened from 392min to 21min, which suggests that the gypsum-based thermally retarded 3D printing material could be rapidly shaped after cooling, ensuring layer-by-layer progress of 3D printing.
The above examples are presented for clarity of illustration only and are not limiting of the embodiments. Other variations or modifications of the above description will be apparent to those of ordinary skill in the art, and it is not necessary or exhaustive of all embodiments, and thus all obvious variations or modifications that come within the scope of the invention are desired to be protected.
Claims (9)
1. The preparation and application method of the gypsum-based thermally-induced retarding 3D printing material is characterized by comprising the following steps of:
1) According to the parts by weight, 100 parts of gypsum, 0-3 parts of exciting agent, 0.1-5 parts of rheology modifier and 0.01-3 parts of thixotropic modifier are uniformly mixed to obtain a component A;
2) Uniformly mixing 30-60 parts of water and 0.01-3 parts of water reducer to obtain a component B;
3) Before use, preheating the component A and the component B, and under the condition of heat preservation, mixing the component A and the component B according to the mass ratio of 100: (27-63) mixing and uniformly stirring to obtain a gypsum-based thermally-induced retarding 3D printing material;
4) When the gypsum-based thermal retarding 3D printing material is used, the thermal insulation state of the gypsum-based thermal retarding 3D printing material is maintained before printing, and the gypsum-based thermal retarding 3D printing material is naturally cooled and molded after printing.
2. The method of making and using a gypsum-based thermally retarded 3D printing material according to claim 1, wherein the water reducing agent is a polycarboxylate type water reducing agent.
3. The method of making and using a gypsum-based thermally retarded 3D printing material according to claim 1, wherein the gypsum is a high strength gypsum powder.
4. The method of making and using a gypsum-based thermally retarded 3D printing material according to claim 1, wherein the activator is one or more of sodium sulfate, sodium bisulfate, sodium silicate, sodium chloride.
5. The method of making and using a gypsum-based thermally retarded 3D printing material according to claim 1, wherein the rheology modifier is one or more of hydrophilic fumed silica, soluble starch, hydroxypropyl methylcellulose, dextrin.
6. The method of making and using a gypsum-based thermally retarded 3D printing material according to claim 5, wherein the hydrophilic fumed silica has a particle size of 7-40nm.
7. The method of making and using a gypsum-based thermally retarded 3D printing material according to claim 1, wherein the thixotropic modifying agent is one or more of attapulgite, starch ether, polyamide powder.
8. The method for preparing and using the gypsum-based thermally-induced retarded 3D printing material according to claim 1, wherein the preheating and heat preservation temperature is 50-85 ℃.
9. The method for preparing and using the gypsum-based heat-induced retarding 3D printing material according to claim 1, wherein the stirring speed is 100-250 r/min, and the stirring time is 2-5 min.
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| CN103482898A (en) * | 2013-06-27 | 2014-01-01 | 俞锡贤 | Thickening time control agent used for gypsum mortar, and preparation method thereof |
| CN110436869A (en) * | 2019-07-29 | 2019-11-12 | 武汉理工大学 | A kind of gypsum base 3D printing material and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103482898A (en) * | 2013-06-27 | 2014-01-01 | 俞锡贤 | Thickening time control agent used for gypsum mortar, and preparation method thereof |
| CN110436869A (en) * | 2019-07-29 | 2019-11-12 | 武汉理工大学 | A kind of gypsum base 3D printing material and preparation method thereof |
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