A kind of sculpture clay that can be used without being remolded and its preparation method

Abstract

The present invention relates to the technical field of sculpture materials, and discloses a kind of sculpture clay that can be used without being reproduced. By weight, the components include: 3-5 parts of kaolin intercalated with modified PVA, 1-2 parts of newspaper pulp, 2-3 parts of glutinous rice paste, and 1 part of sodium carbonate solution; the water content of the newspaper pulp is 40-60wt%, the solid content of the glutinous rice paste is 15-20wt%, and the mass concentration of the sodium carbonate solution is 8-12%. The present invention uses kaolin intercalated with modified PVA as a filling material, glutinous rice paste as a bonding and gelling material, and adds newspaper pulp to toughen. The prepared sculpture clay is not easy to crack and can be stored for a long time; at the same time, it has the advantages of not sticking to hands, large hardness after curing, small shrinkage coefficient, and light weight, and any pigment effect can be made on the surface.

Description

Technical Field

[0001] The present invention relates to the technical field of sculpture materials, and particularly relates to a kind of sculpture clay that can be directly formed without mold making and its preparation method. Background Art

[0002] When making sculptures, it is necessary to first use soft and easily moldable natural clay to make clay sculptures for preliminary sample production. However, the clay sculptures, which are the basis of sculpture production, are prone to cracking after drying and cannot be stored for a long time. In order to make sculptures can be stored for a long time, they must be converted into hard materials such as wood, stone, metal, etc. Therefore, in the existing technology of sculpture production, in order to convert the clay sculpture body into a hard material, it is usually necessary to first make a plaster mold from the clay sculpture work, and then process the finished product as needed.

[0003] The mold making step makes the sculpture production process complex, and the quality of mold making will also affect the overall quality of the sculpture art. If a soft sculpture material that can be stored for a long time and does not require mold making can be found to replace the traditional natural clay, the sculpture production process can be greatly simplified and the quality stability of the sculpture can be improved. Summary of the Invention

[0004] The present invention is to overcome the problems in the prior art that the clay sculpture material is prone to cracking after drying, difficult to store for a long time, and needs to be converted into a hard material through the mold making process, resulting in a complex sculpture production process. The present invention provides a kind of sculpture clay that can be directly formed without mold making and its preparation method. The modified PVA intercalated kaolin is used as the filling material, the glutinous rice paste is used as the bonding and gelling material, and newspaper pulp is added for toughening. The prepared sculpture clay is not prone to cracking and can be stored for a long time. At the same time, it has the advantages of non-sticky hands, large hardness after curing, small shrinkage coefficient, light weight, and any pigment effect can be made on the surface.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A kind of sculpture clay that can be directly formed without mold making, in parts by weight, the components include: 3 - 5 parts of modified PVA intercalated kaolin, 1 - 2 parts of newspaper pulp, 2 - 3 parts of glutinous rice paste, 1 part of sodium carbonate solution; the moisture content of the newspaper pulp is 40 - 60wt%, the solid content of the glutinous rice paste is 15 - 20wt%, and the mass concentration of the sodium carbonate solution is 8 - 12%.

[0007] The sculpture clay made of kaolin as the filling material and glutinous rice paste as the bonding and gelling material of the present invention has the advantages of non-sticky hands, large hardness after curing, small shrinkage coefficient, light weight, and any pigment effect can be made on the surface, and is suitable for sculpture production. Moreover, the present invention adds pulp fibers to the sculpture clay, which can further improve the ductility and crack resistance of the sculpture clay, so that the clay sculpture can be directly formed without mold making after being made, and the made clay sculpture is not prone to cracking and can be stored for a long time.

[0008] When kaolin is directly mixed with rice paste and newspaper pulp, kaolin is prone to agglomeration and difficult to disperse evenly in rice paste and pulp, which is not conducive to improving the mechanical properties of sculpture clay. Therefore, in the present invention, PVA is used to intercalate and modify kaolin. PVA is a water-soluble polymer. Using it to intercalate and modify kaolin can reduce the agglomeration of kaolin, and the modified kaolin has good compatibility with rice paste, further improving the mechanical properties of the cured sculpture clay and facilitating the long-term preservation of clay sculptures. The addition of sodium carbonate solution can gel PVA and improve the crack resistance of clay sculptures.

[0009] Preferably, the preparation method of the modified PVA-intercalated kaolin comprises the following steps:

[0010] A) Disperse kaolin in dimethyl sulfoxide solution, and obtain dimethyl sulfoxide-intercalated kaolin after stirring and reacting;

[0011] B) Mix dimethyl sulfoxide-intercalated kaolin with vinyl acetate, and obtain vinyl acetate-intercalated kaolin after stirring and reacting;

[0012] C) Disperse vinyl acetate-intercalated kaolin in methanol, add an initiator to carry out the polymerization reaction of vinyl acetate, and obtain polyvinyl acetate-intercalated kaolin;

[0013] D) Dissolve polyvinyl acetate-intercalated kaolin in methanol, add sodium hydroxide solution, and carry out alcoholysis on polyvinyl acetate to obtain PVA-intercalated kaolin;

[0014] E) Dissolve PVA-intercalated kaolin in a mixed solvent of methanol and water, add an esterification reaction catalyst, and then dropwise add an aqueous solution of tartaric acid to the system for an esterification reaction; after the esterification reaction, add a transesterification reaction catalyst to the product and dropwise add dimethyl carbonate for a transesterification reaction. After the reaction is completed, separate, wash, and dry the product to obtain the modified PVA-intercalated kaolin.

[0015] In the present invention, dimethyl sulfoxide is first used to intercalate kaolin to expand the layer spacing of kaolin, then vinyl acetate monomer is replaced into the kaolin interlayer, and then PVA-intercalated kaolin is obtained through in-situ polymerization and alcoholysis; in order to further improve the use performance of sculpture clay and the mechanical properties of clay sculptures, in the present invention, through the esterification reaction of the hydroxyl groups on PVA with tartaric acid and the transesterification reaction of dimethyl carbonate, tartaric acid and dimethyl carbonate are introduced into the molecular chain of PVA. The introduction of tartaric acid can improve the water solubility of PVA, facilitating the mixing of the modified kaolin with rice paste and newspaper pulp; the introduction of dimethyl carbonate can improve the mechanical strength of PVA, which is beneficial to the long-term preservation of clay sculptures.

[0016] Preferably, in step A), the solvent in the dimethyl sulfoxide solution is methanol, and the volume ratio of dimethyl sulfoxide to methanol is 8-10:1; the mass-volume ratio of kaolin to the dimethyl sulfoxide solution is 1 g:20-30 mL; the stirring reaction temperature is 80-90 °C, and the stirring reaction time is 18-30 h.

[0017] Preferably, in step B), the mass ratio of dimethyl sulfoxide-intercalated kaolin to vinyl acetate is 1:15-20, the stirring reaction temperature is 20-40 °C, and the stirring reaction time is 18-30 h.

[0018] Preferably, in step C), the initiator is azobisisobutyronitrile, the addition amount of the initiator is 0.5-1% of the mass of vinyl acetate-intercalated kaolin, the polymerization reaction temperature is 35-45 °C, and the polymerization reaction time is 3-5 h.

[0019] Preferably, in step D), in the sodium hydroxide solution added, the mass ratio of sodium hydroxide to polyvinyl acetate-intercalated kaolin is 1:15-20; the alcoholysis temperature is 25-35 °C, and the alcoholysis time is 30-40 min.

[0020] Preferably, in step E), the mass ratio of PVA-intercalated kaolin, tartaric acid, and dimethyl carbonate added is 1:2-3:0.3-0.5; both the esterification reaction catalyst and the transesterification reaction catalyst are sodium methoxide, and the addition amount of the esterification reaction catalyst is 1-3% of the mass of PVA-intercalated kaolin; the esterification reaction temperature is 55-65 °C, and the esterification reaction time is 4-6 h; the addition amount of the transesterification reaction catalyst is 0.5-1% of the mass of PVA-intercalated kaolin, the transesterification reaction temperature is 60-65 °C, and the transesterification reaction time is 6-8 h.

[0021] The present invention also discloses a preparation method of the above-mentioned sculpture clay that can be free of mold making, including the following steps:

[0022] (1) Prepare modified PVA-intercalated kaolin;

[0023] (2) Prepare newspaper pulp: Tear up waste newspapers and soak them in water, stir into a paste to obtain newspaper pulp;

[0024] (3) Prepare glutinous rice paste: Boil glutinous rice with water into a paste, and obtain glutinous rice paste after cooling;

[0025] (4) Mix the modified PVA-intercalated kaolin, newspaper pulp, glutinous rice paste, and sodium carbonate solution in proportion, stir and pound evenly to obtain the sculpture clay that can be free of mold making.

[0026] Preferably, in step (2), the soaking time of waste newspapers in water is 1-2 h.

[0027] Preferably, in step (3), the boiling time of glutinous rice is 60 - 90 min.

[0028] Therefore, the present invention has the following beneficial effects:

[0029] (1) The present invention uses kaolin as a filling material, glutinous rice paste as a binding and gelling material, and adds newspaper pulp. The prepared sculpture clay has the advantages of non-sticky hands, high hardness after curing, small shrinkage coefficient, and light weight. Moreover, any pigment effect can be achieved on the surface. After being made into clay sculptures, it can be directly formed without mold turning, the clay sculptures are not easy to crack and can be preserved for a long time;

[0030] (2) Intercalation modification of kaolin is carried out with modified PVA, which can reduce the agglomeration of kaolin. And the modified kaolin has good compatibility with glutinous rice paste, further improving the mechanical properties of the sculpture clay after curing and facilitating the long-term preservation of clay sculptures; (3) Tartaric acid and dimethyl carbonate are introduced into the molecular chain of PVA intercalated in the kaolin layer. The introduction of tartaric acid can improve the water solubility of PVA, facilitating the mixing of the modified kaolin with glutinous rice paste and newspaper pulp; the introduction of dimethyl carbonate can improve the mechanical strength of PVA, which is beneficial to the long-term preservation of clay sculptures. Specific embodiments

[0031] The following further describes the present invention in conjunction with specific embodiments.

[0032] In the present invention, unless otherwise specified, all raw materials can be purchased from the market or are commonly used in this industry. The methods in the following examples, unless otherwise specified, are all conventional methods in this field.

[0033] Example 1:

[0034] A preparation method of a sculpture clay that can be formed without mold turning, the steps are as follows:

[0035] (1) Prepare kaolin intercalated with modified PVA:

[0036] A) Disperse kaolin (chemically pure, particle size 2 μm) in a methanol solution of dimethyl sulfoxide (dimethyl sulfoxide: methanol = 9:1 v / v), and the mass-volume ratio of kaolin to dimethyl sulfoxide solution is 1 g:25 mL; after stirring and reacting at 85 °C for 24 h, kaolin intercalated with dimethyl sulfoxide is obtained;

[0037] B) Mix the kaolin intercalated with dimethyl sulfoxide and vinyl acetate in a mass ratio of 1:18, and after stirring and reacting at 25 °C for 24 h, kaolin intercalated with vinyl acetate is obtained;

[0038] C) Disperse the kaolin intercalated with vinyl acetate in methanol, add azobisisobutyronitrile accounting for 0.6% of the mass of the kaolin intercalated with vinyl acetate, and carry out a polymerization reaction at 40 °C for 4 h to obtain kaolin intercalated with polyvinyl acetate;

[0039] D) Dissolve the polyvinyl acetate intercalated kaolin in methanol, add a 15 wt% sodium hydroxide solution, and carry out alcoholysis on the polyvinyl acetate. In the added sodium hydroxide solution, the mass ratio of sodium hydroxide to polyvinyl acetate intercalated kaolin is 1:18; the alcoholysis temperature is 30 °C and the alcoholysis time is 35 min to obtain PVA intercalated kaolin;

[0040] E) Dissolve the PVA intercalated kaolin in a mixed solvent of methanol and water (methanol:water = 3:7 v / v), add sodium methoxide accounting for 2% of the mass of the PVA intercalated kaolin, and then dropwise add an aqueous solution of tartaric acid to carry out an esterification reaction. The esterification reaction temperature is 60 °C and the esterification reaction time is 5 h; after the esterification reaction, add sodium methoxide accounting for 0.6% of the mass of the PVA intercalated kaolin to the product and dropwise add dimethyl carbonate to carry out a transesterification reaction. The transesterification reaction temperature is 62 °C and the transesterification reaction time is 7 h; among them, the mass ratio of the added PVA intercalated kaolin, tartaric acid, and dimethyl carbonate is 1:2.5:0.4; after the reaction is completed, separate, wash, and dry the product to obtain the modified PVA intercalated kaolin;

[0041] (2) Prepare newspaper pulp: Tear up waste newspapers and soak them in water for 2 h, then stir into a paste to obtain newspaper pulp with a water content of 50 wt%;

[0042] (3) Prepare glutinous rice paste: Add water to glutinous rice and cook for 90 min until it becomes a paste, and then cool to obtain glutinous rice paste with a solid content of 20 wt%; (4) By weight, mix 4 parts of modified PVA intercalated kaolin, 1.5 parts of newspaper pulp, 2.5 parts of glutinous rice paste, and 1 part of 10 wt% sodium carbonate solution, and stir and pound evenly to obtain the said sculpting clay that can be used without mold flipping.

[0043] Example 2:

[0044] A preparation method of sculpting clay that can be used without mold flipping, the steps are as follows:

[0045] (1) Prepare modified PVA intercalated kaolin:

[0046] A) Disperse kaolin (chemically pure, particle size 2 μm) in a methanol solution of dimethyl sulfoxide (dimethyl sulfoxide:methanol = 8:1 v / v), and the mass-volume ratio of kaolin to dimethyl sulfoxide solution is 1 g:30 mL; stir and react at 80 °C for 30 h to obtain dimethyl sulfoxide intercalated kaolin;

[0047] B) Mix the dimethyl sulfoxide intercalated kaolin with vinyl acetate in a mass ratio of 1:15, and stir and react at 40 °C for 18 h to obtain vinyl acetate intercalated kaolin;

[0048] C) Disperse the kaolin intercalated with vinyl acetate in methanol, add azobisisobutyronitrile accounting for 0.5% of the mass of the kaolin intercalated with vinyl acetate, and carry out a polymerization reaction at 35 °C for 5 h to obtain kaolin intercalated with polyvinyl acetate;

[0049] D) Dissolve the kaolin intercalated with polyvinyl acetate in methanol, and add a 20 wt% sodium hydroxide solution to alcoholize the polyvinyl acetate. In the added sodium hydroxide solution, the mass ratio of sodium hydroxide to the kaolin intercalated with polyvinyl acetate is 1:15; the alcoholysis temperature is 25 °C and the alcoholysis time is 40 min to obtain kaolin intercalated with PVA;

[0050] E) Dissolve the kaolin intercalated with PVA in a mixed solvent of methanol and water (methanol: water = 4:6 v / v), add sodium methoxide accounting for 1% of the mass of the kaolin intercalated with PVA, and then dropwise add an aqueous solution of tartaric acid to carry out an esterification reaction. The esterification reaction temperature is 65 °C and the esterification reaction time is 4 h; after the esterification reaction, add sodium methoxide accounting for 1% of the mass of the kaolin intercalated with PVA to the product and dropwise add dimethyl carbonate to carry out a transesterification reaction. The transesterification reaction temperature is 65 °C and the transesterification reaction time is 6 h; wherein, the mass ratio of the added kaolin intercalated with PVA, tartaric acid, and dimethyl carbonate is 1:2:0.3; after the reaction is completed, separate, wash, and dry the product to obtain the modified kaolin intercalated with PVA;

[0051] (2) Prepare newspaper pulp: Tear up the waste newspaper and soak it in water for 1 h, then stir it into a paste to obtain newspaper pulp with a water content of 60 wt%;

[0052] (3) Prepare glutinous rice paste: Add water to glutinous rice and cook it for 60 min until it becomes a paste, and then cool it to obtain glutinous rice paste with a solid content of 15 wt%; (4) By weight, mix 3 parts of the modified kaolin intercalated with PVA, 1 part of newspaper pulp, 2 parts of glutinous rice paste, and 1 part of 8 wt% sodium carbonate solution, and stir and pound evenly to obtain the cast-free sculpture clay.

[0053] Example 3:

[0054] A method for preparing a cast-free sculpture clay, the steps are as follows:

[0055] (1) Prepare modified kaolin intercalated with PVA:

[0056] A) Disperse kaolin (chemically pure, particle size 2 μm) in a methanol solution of dimethyl sulfoxide (dimethyl sulfoxide: methanol = 10:1 v / v), and the mass-volume ratio of kaolin to the dimethyl sulfoxide solution is 1 g: 20 mL; stir and react at 90 °C for 18 h to obtain dimethyl sulfoxide intercalated kaolin;

[0057] B) Mix kaolin intercalated with dimethyl sulfoxide and vinyl acetate in a mass ratio of 1:20, and stir and react at 25 °C for 30 h to obtain kaolin intercalated with vinyl acetate;

[0058] C) Disperse kaolin intercalated with vinyl acetate in methanol, add azobisisobutyronitrile accounting for 1% of the mass of kaolin intercalated with vinyl acetate, and carry out a polymerization reaction at 45 °C for 3 h to obtain kaolin intercalated with polyvinyl acetate;

[0059] D) Dissolve kaolin intercalated with polyvinyl acetate in methanol, and add a 25 wt% sodium hydroxide solution to carry out alcoholysis on polyvinyl acetate. In the added sodium hydroxide solution, the mass ratio of sodium hydroxide to kaolin intercalated with polyvinyl acetate is 1:20; the alcoholysis temperature is 35 °C, and the alcoholysis time is 30 min to obtain kaolin intercalated with PVA;

[0060] E) Dissolve kaolin intercalated with PVA in a mixed solvent of methanol and water (methanol: water = 3:7 v / v), add sodium methoxide accounting for 3% of the mass of kaolin intercalated with PVA, and then dropwise add an aqueous solution of tartaric acid to carry out an esterification reaction. The esterification reaction temperature is 55 °C, and the esterification reaction time is 6 h; after the esterification reaction, add sodium methoxide accounting for 0.5% of the mass of kaolin intercalated with PVA to the product, and dropwise add dimethyl carbonate to carry out a transesterification reaction. The transesterification reaction temperature is 60 °C, and the transesterification reaction time is 8 h; among them, the mass ratio of kaolin intercalated with PVA, tartaric acid, and dimethyl carbonate added is 1:3:0.5; after the reaction, separate, wash, and dry the product to obtain the modified kaolin intercalated with PVA;

[0061] (2) Prepare newspaper pulp: Tear waste newspapers into pieces, soak them in water for 2 h, and stir into a paste to obtain newspaper pulp with a water content of 40 wt%;

[0062] (3) Prepare glutinous rice paste: Add water to glutinous rice and cook for 90 min until it becomes a paste, and cool to obtain glutinous rice paste with a solid content of 20 wt%; (4) By weight, mix 5 parts of modified kaolin intercalated with PVA, 2 parts of newspaper pulp, 3 parts of glutinous rice paste, and 1 part of 12 wt% sodium carbonate solution, and stir and pound evenly to obtain the said sculpture clay that can be used without re - casting.

[0063] Comparative Example 1 (without adding newspaper pulp):

[0064] The difference between Comparative Example 1 and Example 1 is that newspaper pulp is not added to the sculpture clay, and the rest are the same as in Example 1.

[0065] Comparative Example 2 (without intercalation modification of kaolin):

[0066] A preparation method of a sculpture clay that can be used without re - casting, the steps are as follows:

[0067] (1) Preparation of newspaper pulp: Tear waste newspapers into pieces, soak them in water for 2 h, and stir into a paste to obtain newspaper pulp with a water content of 50 wt%.

[0068] (2) Preparation of glutinous rice paste: Add water to glutinous rice and cook for 90 min until it becomes a paste. After cooling, obtain glutinous rice paste with a solid content of 20 wt%. (3) By weight, mix 4 parts of kaolin (chemically pure, particle size 2 μm), 1.5 parts of newspaper pulp, 2.5 parts of glutinous rice paste, and 1 part of 10 wt% sodium carbonate solution, stir and pound evenly to obtain the sculpting clay that can be used without re - casting.

[0069] Comparative Example 3 (without modifying PVA with tartaric acid):

[0070] The difference between Comparative Example 3 and Example 1 is that in the preparation process of modified PVA - intercalated kaolin, step E) is: Dissolve PVA - intercalated kaolin in a mixed solvent of methanol and water (methanol: water = 3:7 v / v), add sodium methoxide accounting for 2% of the mass of PVA - intercalated kaolin, and then drop - wise add dimethyl carbonate to the system for transesterification reaction. The transesterification reaction temperature is 62 °C and the transesterification reaction time is 7 h; wherein, the mass ratio of the added PVA - intercalated kaolin to dimethyl carbonate is 1:0.4; after the reaction, separate, wash, and dry the product to obtain the modified PVA - intercalated kaolin; the rest are the same as in Example 1.

[0071] Comparative Example 4 (without modifying PVA with dimethyl carbonate):

[0072] The difference between Comparative Example 4 and Example 1 is that in the preparation process of modified PVA - intercalated kaolin, step E) is: Dissolve PVA - intercalated kaolin in a mixed solvent of methanol and water (methanol: water = 3:7 v / v), add sodium methoxide accounting for 2% of the mass of PVA - intercalated kaolin, and then drop - wise add an aqueous solution of tartaric acid for esterification reaction. The esterification reaction temperature is 60 °C and the esterification reaction time is 5 h; wherein, the mass ratio of the added PVA - intercalated kaolin to tartaric acid is 1:2.5; after the reaction, separate, wash, and dry the product to obtain the modified PVA - intercalated kaolin; the rest are the same as in Example 1.

[0073] Make the sculpting clay prepared in the above - mentioned examples and comparative examples into 50 clay specimens of 1 cm × 1 cm × 10 cm respectively. After air - drying at room temperature, test their mechanical properties with a universal material testing machine; and place the specimens in the same environment for 24 months, and count the cracking rate of the specimens (cracking rate = number of specimens with cracks / total number of specimens × 100%). The results are shown in Table 1.

[0074] Table 1: Test results of mechanical properties of clay sculptures.

[0075]

[0076] As can be seen from Table 1, the sculpture clay prepared with the formula of the present invention in Examples 1 to 3 has high strength and is not easy to crack, and the clay sculptures prepared can be stored for a long time. In the sculpture clay of Comparative Example 1, newspaper pulp is not added, lacking the toughening effect of pulp fibers, and the clay sculptures are easy to crack after curing, and the storage period is significantly reduced compared with that in the examples. In Comparative Example 2, the kaolin is not intercalated and modified, and the kaolin is easy to agglomerate during the production process of the sculpture clay, resulting in a significant reduction in the mechanical properties of the clay sculptures compared with those in Example 1, and it is easy to crack during storage. In Comparative Example 3, after the kaolin is intercalated with PVA, tartaric acid is not modified on its molecular chain, and the solubility of PVA in water is insufficient, and the wettability and compatibility of the kaolin filler and the glutinous rice paste are poor during the production process of the sculpture clay, resulting in a significant reduction in the mechanical properties and anti-cracking properties of the clay sculptures compared with those in Example 1. In Comparative Example 4, dimethyl carbonate is not modified on the molecular chain of PVA, and the strength and anti-cracking properties of the material also decrease compared with those in Example 1, and the storage period of the clay sculptures is shortened.

Claims

1. A preparation method of a sculpture clay that can be used without being remolded, characterized in that the steps include: (1) Preparation of modified PVA intercalated kaolin: A) mixing kaolin and dimethyl sulfoxide solution and stirring to react; B) mixing the product of step A) with vinyl acetate and stirring for reaction; C) dispersing the product of step B) in methanol, adding an initiator to carry out polymerization of vinyl acetate; D) adding the product of step C) into methanol to dissolve, and adding sodium hydroxide solution to carry out alcoholysis; E) dissolving the product of step D) in methanol and water, adding an esterification reaction catalyst, and then dropping an aqueous solution of tartaric acid to carry out an esterification reaction; then adding an ester exchange reaction catalyst to the product, and dropping dimethyl carbonate to carry out an ester exchange reaction, and after the reaction is completed, separating, washing, and drying the product to obtain a modified PVA intercalated kaolin; (2) tearing up waste newspapers, soaking them in water, and stirring them into a paste to obtain newspaper pulp with a moisture content of 40-60wt%; (3) adding water to glutinous rice and cooking it into a paste, and cooling it to obtain a glutinous rice paste with a solid content of 15-20wt%; (4) In parts by weight, 3-5 parts of modified PVA intercalated kaolin, 1-2 parts of newspaper pulp, 2-3 parts of glutinous rice paste and 1 part of 8-12% sodium carbonate solution are mixed in proportion, stirred and pounded evenly to obtain sculpture clay that does not need to be turned over.

2. The preparation method of the sculpting clay that can be exempted from reproduction according to claim 1, characterized in that, In step A), the solvent in the dimethyl sulfoxide solution is methanol, and the volume ratio of dimethyl sulfoxide to methanol is 8-10:1; the mass volume ratio of kaolin to dimethyl sulfoxide solution is 1 g:20-30 mL; the stirring reaction temperature is 80-90° C., and the stirring reaction time is 18-30 h.

3. The preparation method of the sculpture clay that can be exempted from reproduction according to claim 1, characterized in that, In step B), the mass ratio of kaolin intercalated with dimethyl sulfoxide to vinyl acetate is 1:15-20, the stirring reaction temperature is 20-40° C., and the stirring reaction time is 18-30 hours.

4. The preparation method of the sculpting clay that can be exempted from reproduction according to claim 1, characterized in that, The initiator in step C) is azobisisobutyronitrile, the amount of the initiator added is 0.5-1% of the mass of the vinyl acetate intercalated kaolin, the polymerization temperature is 35-45° C., and the polymerization time is 3-5 hours.

5. The preparation method of the reusable sculpting clay according to claim 1, characterized in that, In the sodium hydroxide solution added in step D), the mass ratio of sodium hydroxide to polyvinyl acetate intercalated kaolin is 1:15-20; the alcoholysis temperature is 25-35° C., and the alcoholysis time is 30-40 min.

6. The preparation method of the sculpting clay that can be exempted from reproduction according to claim 1, characterized in that, The mass ratio of kaolin, tartaric acid and dimethyl carbonate added to the PVA intercalation layer in step E) is 1:2~3:0.3~0.5; the esterification reaction temperature is 55~65°C and the esterification reaction time is 4~6h; the ester exchange reaction temperature is 60~65°C and the ester exchange reaction time is 6~8h.

7. The preparation method of the sculpture clay that can be exempted from reproduction according to claim 1 or 6, characterized in that, In step E), an esterification reaction catalyst and an esterification reaction catalyst are added during the esterification reaction and the ester exchange reaction, respectively. The esterification reaction catalyst and the ester exchange reaction catalyst are both sodium methoxide. The amount of the esterification reaction catalyst added is 1-3% of the mass of the kaolin intercalated with the PVA; the amount of the ester exchange reaction catalyst added is 0.5-1% of the mass of the kaolin intercalated with the PVA.

8. The preparation method of the sculpting clay that can be exempted from reproduction according to claim 1, characterized in that, In step (2), the waste newspapers are soaked in water for 1 to 2 hours.

9. The preparation method of the sculpting clay that can be exempted from reproduction according to claim 1, characterized in that, The boiling time of the glutinous rice in step (3) is 60 to 90 minutes.

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