Preparation method of sculpture process slime

Abstract

The invention relates to the field of slime preparation, in particular to a sculpture process slime preparation method which comprises the following steps: preparing a matrix solution, stirring and dissolving 15-20 parts of sodium carboxymethyl cellulose, and adding 8-12 parts of sodium carboxymethyl starch and a vibrating screen mixed solution of xanthan gum; preparing 0.3-0.6 part of polyamide fiber dispersion liquid and 0.1-0.3 part of nanocellulose dispersion liquid, and carrying out ultrasonic treatment on nanocellulose and PEG400 according to the ratio of 1: 10; 0.5-1.2 parts of KH550 and 0.05-0.1 part of dibutyltin dilaurate are hydrolyzed to generate an activated silane solution, and 3-5 parts of PVB and 4-6 parts of DOP are subjected to a chelation reaction to form a chelation solution; 8-12 parts of expanded perlite are dried and modified with a KH550 solution with the mass being 0.5% of that of the expanded perlite, and silane modified expanded perlite is prepared; carrying out centrifugal intercalation treatment on 5-8 parts of nano montmorillonite and CTAB (Cetyltrimethyl Ammonium Bromide) according to a ratio of 1: 1.5 to obtain modified montmorillonite; the perlite and the montmorillonite are mixed to prepare the composite material, secondary mixing is performed, and extrusion molding is performed through a screw extruder, so that the bonding strength of a metal interface is improved, and the cracking rate of a high-durability process scene is reduced.

Description

Technical Field

[0001] The invention relates to the field of clay preparation, and in particular to a method for preparing clay for sculpture crafts. Background Art

[0002] Sculpture clay, a highly plastic and weather-resistant material, must balance modeling flexibility, environmental stability, and adhesion to the substrate. Traditional clays are often based on composite systems of natural or synthetic polymers (such as cellulose derivatives) and mineral fillers, but they often face the following problems: Insufficient bonding strength: Weak interfacial bonding to low surface energy substrates such as metals; Limited crack resistance: cracking is easily caused by shrinkage stress during drying or temperature changes; Functionality is single: The filler system is mainly composed of coarse particles and lacks nano-reinforcement and interface modification design.

[0003] A Chinese invention patent (CN107973940B) discloses a device for preparing sculpture clay for arts and crafts. The device is primarily composed of carboxymethyl cellulose (CMC) and sodium carboxymethyl starch (CMS) (80-110 parts each), supplemented with plasticizers (dioctyl isophthalate, glycerol), preservatives (sodium benzoate), and a large amount of inorganic fillers (light calcium carbonate, magnesium carbonate, talc, titanium dioxide, etc.). While this device improves moldability and weather resistance, reduces clay brittleness, and extends storage stability, it still has the following shortcomings: 1. Interface adhesion relies on physical adsorption: No coupling agent or nano-reinforcement material is introduced, and the bonding with the metal substrate relies solely on the hydrogen bonding of CMC / CMS, resulting in limited adhesion. 2. Single anti-cracking mechanism: Relying on the dimensional stability of inorganic fillers and lacking fiber reinforcement or nano-dispersion stress dissipation design; 3. Insufficient environmental adaptability: The interface has not been modified to address volume changes caused by humidity and temperature changes, and there is still a risk of delamination after long-term outdoor use. Summary of the Invention

[0004] To this end, the present invention provides a method for preparing sculpture craft clay, so as to overcome the problem in the prior art that the sculpture craft clay has insufficient adhesion to metal, resulting in limited crack resistance.

[0005] To achieve the above object, the present invention provides a method for preparing sculpture craft clay, comprising the following steps: Step S1, taking 15-20 parts of sodium carboxymethyl cellulose (CMC) and stirring and dissolving them to obtain a CMC solution; Step S2, mixing 8-12 parts of sodium carboxymethyl starch (CMS) and xanthan gum at a ratio of 40:1, adding the CMC solution through a vibrating screen to obtain a matrix solution; Step S3, dispersing 0.3-0.6 parts of polyamide fiber to obtain a polyamide fiber dispersion; Step S4, ultrasonically dispersing and preventing sedimentation of 0.1-0.3 parts of nanocellulose and PEG400 at a ratio of 1:10 to obtain a nanocellulose dispersion; Step S5, hydrolyzing and activating 0.5-1.2 parts of aminopropyltriethoxysilane (KH550) and 0.05-0.1 parts of dibutyltin dilaurate to obtain an activated silane solution; Step S6, performing a chelating reaction on 3-5 parts of polyvinyl butyral (PVB) and 4-6 parts of dioctyl phthalate (DOP) to obtain a chelated solution; Step S7: 8 to 12 parts of expanded perlite, drying the expanded perlite, adding 0.5% aminopropyltriethoxysilane (KH550) solution based on the mass of the expanded perlite and mixing to obtain silane-modified expanded perlite; Step S8, performing centrifugal intercalation treatment on 5-8 parts of nano-montmorillonite and CTAB at a ratio of 1:1.5 to obtain intercalated montmorillonite; Step S9, fusing and mixing the silane-modified expanded perlite and the intercalated montmorillonite to obtain a composite material; Step S10: adding the matrix solution, nanocellulose dispersion, compounding solution and composite material in sequence, mixing and stirring, and extruding through a screw extruder to form.

[0006] Furthermore, in step S1, obtaining the CMC solution includes: Determine the dissolution temperature and shear rate according to the mass fraction of sodium carboxymethyl cellulose (CMC); The sodium carboxymethyl cellulose (CMC) is stirred and dissolved using the dissolving temperature and shear rate; Monitor the solution during the dissolution process and control the solution viscosity between 800 and 1200 mPa.s.

[0007] Furthermore, in step S2, obtaining a CMC solution and adding the CMC solution through a vibrating screen to obtain a matrix solution includes: Use an 80-mesh vibrating sieve to sieve the sodium carboxymethyl cellulose (CMC) and add the CMC solution several times, with an interval of 3 minutes; Determine the extended cooking time according to the mass fraction of sodium carboxymethyl starch (CMS); Periodically obtaining a matrix solution curve, and determining the end of adding the CMC solution according to the degree of fit between the matrix solution curve and a standard matrix solution curve; The thixotropic index of the matrix solution is monitored, and if the thixotropic index reaches 1.8 to 2.2, the aging is determined to be terminated.

[0008] Furthermore, in step S3, obtaining the polyamide fiber dispersion includes: Determine the dispersion speed and dispersion time according to the mass fraction of the polyamide fiber; The polyamide fiber is dispersed by using a high shear emulsifier at the rotation speed and dispersion time to obtain the polyamide fiber dispersion.

[0009] Furthermore, in step S4, obtaining the nanocellulose dispersion comprises: determining ultrasonic parameters according to the mass fraction of the nanocellulose dispersion; After ultrasonic dispersion was completed, 0.1% hydroxypropyl methylcellulose (HPMC) was added; The magnetic stirring was maintained at 2000 rpm until the feeding was completed.

[0010] Furthermore, in step S5, obtaining the activated silane solution includes: The pH control range, the mass fraction of dibutyltin dilaurate, and the activation time during the hydrolysis process are determined according to the mass fraction of the aminopropyltriethoxysilane (KH550); The pH control range is 0.4 times the mass fraction of aminopropyltriethoxysilane (KH550) plus 4.2. The mass fraction of the dibutyltin dilaurate is 8% of the mass fraction of the aminopropyltriethoxysilane (KH550); The activation time is 15 times the mass fraction of the aminopropyltriethoxysilane (KH550), and the unit is min.

[0011] Furthermore, in step S6, obtaining the chelating solution includes: determining the dissolution temperature of the polyvinyl butyral (PVB) according to the mass fraction of the polyvinyl butyral (PVB); The polyvinyl butyral (PVB) solvent is selected from anhydrous ethanol and ethyl acetate in a volume ratio of 3:1; Dioctyl phthalate (DOP) was added in several batches at 5-min intervals until the transmittance of the solution was greater than 90%.

[0012] Furthermore, in step S7, obtaining the silane-modified expanded perlite includes: Take the mass fraction of the expanded perlite, multiply it by 10 times, and add 50, and determine the calculated result as the drying temperature; The drying time was set to 2 h and the vacuum degree was set to -0.08 MPa.

[0013] Furthermore, in the step S8, obtaining the intercalated montmorillonite includes determining the centrifugal speed and the centrifugal time according to the mass fraction of the nano-montmorillonite.

[0014] Compared with the prior art, the present invention has the following beneficial effects: On the one hand, the silanol groups generated by KH550 hydrolysis form stable Si-O-Fe covalent bonds with metal surface oxides (such as Fe-O), and at the same time, its amino groups (-N ) forms hydrogen bonds or chemical couplings with hydroxyl or carboxyl groups such as carboxymethyl cellulose (CMC) and sodium carboxymethyl starch (CMS) in the matrix, establishing a strong interface connection chain of "metal-coupling agent-matrix", which significantly enhances the adhesion.

[0015] Furthermore, CTAB intercalation increases the interlayer spacing of the montmorillonite, forming a nanoscale dispersed structure and significantly increasing the contact area with the matrix. The montmorillonite flakes form physical crosslinks within the matrix, strengthening interfacial bonding through a mechanical interlocking effect. Simultaneously, their high surface energy allows for adsorption of matrix molecular chains, further optimizing interfacial compatibility.

[0016] Furthermore, polyvinyl butyral (PVB) provides a highly viscous matrix, while dioctyl phthalate (DOP) acts as a plasticizer, embedded between PVB molecular chains to lower the glass transition temperature and impart dynamic adhesion to the metal. The stable network formed by the chelation reaction enhances the flexibility of the adhesive layer, allowing it to adapt to microscopic irregularities on the steel surface.

[0017] On the other hand, polyamide fiber (micrometer level) is used as a macroscopic reinforcing skeleton to prevent crack propagation through the crack bridging effect; nanocellulose (nanoscale) is dispersed in the matrix, and its high modulus characteristics are used to induce stress dispersion at the crack tip, forming a "fiber-matrix" multi-level energy dissipation structure and improving fracture toughness.

[0018] In a step, the intercalated montmorillonite flakes are nano-dispersed in the matrix, consuming fracture energy through mechanisms such as crack deflection and flake pull-out; combined with silane-modified expanded perlite (porous structure), a "rigid particle-pore buffer" composite system is formed to inhibit crack nucleation and expansion.

[0019] Furthermore, KH550 modified expanded perlite reduces pore water absorption and reduces volume shrinkage stress caused by environmental humidity; the barrier effect of nano-montmorillonite inhibits water penetration and avoids interfacial delamination and cracking caused by swelling-shrinkage cycles.

[0020] Furthermore, through the synergistic effects of chemical bonding KH550, nano-reinforcement (montmorillonite, nanocellulose), multi-scale fiber toughening (polyamide fiber, nanocellulose), and flexible PVB-DOP, a high-strength adhesion layer is formed at the metal interface. This multi-mechanism energy dissipation significantly inhibits crack initiation and propagation, achieving a dual improvement in bond strength and crack resistance. This makes it suitable for applications in arts and crafts metal substrates with demanding durability requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 Flow chart of the steps of the method for preparing sculpture craft clay according to an embodiment of the present invention; Figure 2 This is a logic block diagram for determining the dissolution temperature according to the mass fraction of sodium carboxymethyl cellulose (CMC) in an embodiment of the present invention; Figure 3 This is a logic block diagram of determining the dispersion speed according to the mass fraction of polyamide fibers according to an embodiment of the present invention; Figure 4 This is a logic block diagram for determining ultrasonic parameters according to the mass fraction of rice cellulose dispersion according to an embodiment of the present invention. DETAILED DESCRIPTION

[0022] In order to make the objects and advantages of the present invention more clearly understood, the present invention is further described below in conjunction with embodiments; it should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0023] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the scope of protection of the present invention.

[0024] It should be noted that, in the description of the present invention, terms such as "up", "down", "left", "right", "inside", and "outside" indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings. This is only for the convenience of description and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention.

[0025] Furthermore, it should be noted that, in the description of the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0026] See also Figure 1 As shown, Figure 1 The present invention is a flowchart of the steps of preparing the sculpture craft clay according to an embodiment of the present invention.

[0027] The embodiment of the present invention provides a method for preparing sculpture craft clay, comprising the following steps: Step S1, taking 15-20 parts of sodium carboxymethyl cellulose (CMC) and stirring and dissolving them to obtain a CMC solution; Step S2, mixing 8-12 parts of sodium carboxymethyl starch (CMS) and xanthan gum at a ratio of 40:1, adding CMC solution through a vibrating screen to obtain a matrix solution; Step S3, dispersing 0.3-0.6 parts of polyamide fiber to obtain a polyamide fiber dispersion; Step S4, ultrasonically dispersing and preventing sedimentation of 0.1-0.3 parts of nanocellulose and PEG400 at a ratio of 1:10 to obtain a nanocellulose dispersion; Step S5, hydrolyzing and activating 0.5-1.2 parts of aminopropyltriethoxysilane (KH550) and 0.05-0.1 parts of dibutyltin dilaurate to obtain an activated silane solution; Step S6, performing a chelating reaction on 3-5 parts of polyvinyl butyral (PVB) and 4-6 parts of dioctyl phthalate (DOP) to obtain a chelated solution; Step S7: 8 to 12 parts of expanded perlite, drying the expanded perlite, adding 0.5% aminopropyltriethoxysilane (KH550) solution based on the mass of the expanded perlite and mixing to obtain silane-modified expanded perlite; Step S8, performing centrifugal intercalation treatment on 5-8 parts of nano-montmorillonite and CTAB at a ratio of 1:1.5 to obtain intercalated montmorillonite; Step S9, fusing and mixing the silane-modified expanded perlite and the intercalated montmorillonite to obtain a composite material; Step S10: adding the matrix solution, the nanocellulose dispersion, the composite solution and the composite material in sequence, mixing and stirring, and extruding through a screw extruder to form.

[0028] Specifically, in step S1, obtaining the CMC solution includes: Determine the dissolution temperature and shear rate based on the mass fraction of sodium carboxymethyl cellulose (CMC); Sodium carboxymethyl cellulose (CMC) was stirred and dissolved using the dissolving temperature and shear rate; Monitor the solution during the dissolution process and control the solution viscosity between 800 and 1200 mPa.s.

[0029] See also Figure 2 , Figure 2 This is a logic block diagram for determining the dissolution temperature based on the mass fraction of sodium carboxymethyl cellulose (CMC) in an embodiment of the present invention.

[0030] Specifically, if the mass fraction of sodium carboxymethyl cellulose (CMC) is less than or equal to 18 parts, the dissolution temperature is 45 degrees, otherwise the dissolution temperature is 50 degrees; If the mass fraction of sodium carboxymethyl cellulose (CMC) is less than or equal to 17 parts, the shear rate is determined to be 1000 rpm, otherwise the shear rate is 1500 rpm.

[0031] Specifically, in step S2, obtaining a CMC solution and adding the CMC solution through a vibrating screen to obtain a matrix solution includes: Use an 80-mesh vibrating screen to sieve sodium carboxymethyl cellulose (CMC) and add CMC solution several times with an interval of 3 minutes; The extended cooking time is determined according to the mass fraction of sodium carboxymethyl starch (CMS); The matrix solution curve is obtained periodically, and the addition of CMC solution is determined to be stopped based on the fit between the matrix solution curve and the standard matrix solution curve.

[0032] Specifically, if the mass fraction of sodium carboxymethyl starch (CMS) is greater than or equal to 10, the cooking time is extended to 2 hours; Monitor the thixotropic index of the matrix solution. If the thixotropic index reaches 1.8~2.2, the aging is determined to be terminated.

[0033] Specifically, obtaining the polyamide fiber dispersion includes: Determine the dispersion speed and dispersion time according to the mass fraction of polyamide fiber; A high shear emulsifier is used to disperse the polyamide fiber at a certain speed and dispersion time to obtain a polyamide fiber dispersion.

[0034] See also Figure 3 , Figure 3 This is a logic block diagram for determining the dispersion rotation speed according to the mass fraction of polyamide fibers in an embodiment of the present invention.

[0035] Specifically, if the mass fraction of the polyamide fiber is less than or equal to 0.45, the dispersion speed is determined to be 2500 rpm, otherwise the dispersion speed is 3500 rpm; The dispersion time was determined by multiplying the result of reducing the mass fraction of the polyamide fiber by 10 times and 1.5.

[0036] Specifically, in step S4, obtaining a nanocellulose dispersion comprises: The ultrasonic parameters were determined according to the mass fraction of the nanocellulose dispersion; After the ultrasonic dispersion is completed, anti-settling treatment is immediately performed.

[0037] See also Figure 4 , Figure 4 This is a logic block diagram for determining ultrasonic parameters according to the mass fraction of rice cellulose dispersion according to an embodiment of the present invention.

[0038] Specifically, if the mass fraction of the nanocellulose dispersion is greater than or equal to 0.1 parts and the mass fraction of the nanocellulose dispersion is less than or equal to 0.2 parts, the ultrasonic parameters are determined to be an ultrasonic frequency of 20 kHz, a power of 0.5 W / mL, and a treatment time of 25 min; Otherwise, determine the ultrasonic parameters as ultrasonic frequency of 40 kHz, power of 0.8 W / mL and treatment time of 35 min.

[0039] After ultrasonic dispersion was completed, 0.1% hydroxypropyl methylcellulose (HPMC) was added; The magnetic stirring was maintained at 2000 rpm until the feeding was completed.

[0040] Specifically, in step S5, obtaining the activated silane solution includes: The pH control range, the mass fraction of dibutyltin dilaurate, and the activation time during the hydrolysis process were determined according to the mass fraction of aminopropyltriethoxysilane (KH550). Among them, the pH control range is the sum of 0.4 times the mass fraction of aminopropyltriethoxysilane (KH550) and 4.2; The mass fraction of dibutyltin dilaurate is 8% of the mass fraction of aminopropyltriethoxysilane (KH550); The activation time is 15 times the mass fraction of aminopropyltriethoxysilane (KH550), and the unit is min.

[0041] Specifically, in step S6, obtaining the chelating solution includes: Determine the dissolution temperature of polyvinyl butyral (PVB) according to the mass fraction of polyvinyl butyral (PVB); The solvent of polyvinyl butyral (PVB) was anhydrous ethanol and ethyl acetate in a volume ratio of 3:1; Dioctyl phthalate (DOP) was added in several batches at 5-min intervals until the transmittance of the solution was greater than 90%.

[0042] Specifically, if the mass fraction of polyvinyl butyral (PVB) is greater than 4 parts, the dissolution temperature is 70°C; Otherwise the melting point is 65°C.

[0043] Specifically, in step S7, obtaining silane-modified expanded perlite includes: Take the mass fraction of the expanded perlite, multiply it by 10 times, and add 50, and determine the calculated result as the drying temperature; The drying time was set to 2 h and the vacuum degree was set to -0.08 MPa.

[0044] Specifically, in step S8, obtaining the intercalated montmorillonite includes determining the centrifugal speed and centrifugal time according to the mass fraction of the nano-montmorillonite.

[0045] Specifically, the centrifugation parameter classification is shown in the table below: , Specifically, in step S10, the stirring parameters are set to: Revolution speed: 15~20rpm; Rotation speed: 30~40rpm; Mixing time: 25~30min (vacuum degree -0.08MPa).

[0046] Specifically, the screw extrusion control parameters are shown in the table below: .

[0047] Example: Sculpture craft clay preparation implementation 1. Components Based on the preparation of 100kg sculpture clay, please refer to the table below for the selection of components: .

[0048] 2. Preparation process 2.1. Preparation of matrix solution CMC dissolution: Take 18 kg of CMC in a jacketed reactor and add 45°C deionized water (total water volume 60 kg) in three batches; Step stirring: 500 rpm × 10 min (initial dissolution) → 1500 rpm × 20 min (late dispersion stage); Viscosity control: real-time monitoring to 1050 ± 50 mPa·s (Brookfield viscometer, LV4 spindle).

[0049] ‌CMS Composite‌: 10 kg of CMS and 0.3 kg of xanthan gum were dry-mixed (V-type mixer, 30 rpm × 15 min); Sprinkle CMC solution through 80 mesh vibration sieve 5 times (2 kg each time, 3 minutes interval); Curing conditions: constant temperature stirring at 25°C (200 rpm×1.5h), thixotropic index reaches 2.0 (rheometer test).

[0050] ‌2.2 Enhanced system construction‌ Polyamide fiber dispersion: Take 0.45 kg of fiber and add it into a high shear emulsifier (the gap between the stator and rotor is 0.2 mm); Shear parameters: 3200 rpm × 6.75 min (calculated according to the formula t = 0.45 × 15); Dispersion end point: Microscope observation shows that the fiber length retention rate is ≥92%, D50=380μm.

[0051] Nanocellulose Activation: 0.2 kg of nanocellulose was premixed with 2.5 kg of PEG400 (magnetic stirring at 800 rpm for 30 min); Ultrasonic treatment: 20 kHz probe, 0.6 W / mL × 25 min (ice water bath temperature ≤ 30 ° C).

[0052] 2.3. Interface system processing KH550 hydrolysis activation: Hydrolyzate preparation: 0.8 kg KH550 + 0.07 kg catalyst + deionized water (pH = 4.2 + 0.8 × 0.4 = 4.52); Reaction conditions: magnetic stirring (500 rpm × 12 min); End point determination: FTIR detection Si-O-Si peak area ratio ≥90%, DLS particle size PDI = 0.21.

[0053] PVB / DOP Chelation: PVB dissolution: 4 kg of PVB was dissolved in ethanol / ethyl acetate (3:1 volume ratio) at 65 °C with stirring; DOP gradient addition: 2 kg (40%) → 1.5 kg (30%) → 1.5 kg (30%), 5 min interval; Transmittance detection: 91.5% (UV-Vis, 650nm wavelength).

[0054] 2.4. Functional filler compounding Expanded perlite modification: Pretreatment: 10 kg of perlite was dried at 150 ° C for 2 h (vacuum degree -0.08 MPa); Surface treatment: spray 0.05kg KH550 ethanol solution (concentration 0.5%), V-type mixer 15rpm×30min.

[0055] Montmorillonite intercalation: 6 kg of montmorillonite and 9 kg of CTAB were shear dispersed in a 60 °C water bath (3000 rpm × 1.8 h); Centrifugal cleaning: 9000 rpm × 18 min (to a conductivity of 42 μS / cm).

[0056] 2.5. Full system mixing and molding ‌Step Mixing Procedure‌: Matrix solution (CMC / CMS) + reinforcement system → planetary stirring (revolution 18 rpm, rotation 35 rpm × 15 min); Add interface system (KH550 / PVB) → vacuum degassing (-0.08 MPa × 45 min); Add functional filler → mix in kneader (40 rpm × 25 min).

[0057] Screw extrusion: Zone I: 28°C + forward thread → feeding speed 7kg / h; Zone II: 38°C + kneading block → side feeding rate 0.45 kg / h; Zone III: 48°C + foaming module → die head pressure 13.5 MPa.

[0058] 3. Performance comparison test , , Thus far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the scope of protection of the present invention is obviously not limited to these specific embodiments. Without departing from the principles of the present invention, those skilled in the art may make equivalent changes or substitutions to the relevant technical features, and the technical solutions after such changes or substitutions will fall within the scope of protection of the present invention.

[0059] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of protection of the present invention.

Claims

1. A method for preparing sculpture craft clay, characterized in that: The following steps are involved: Step S1, taking 15-20 parts of sodium carboxymethyl cellulose (CMC) and stirring and dissolving them to obtain a CMC solution; Step S2, mixing 8-12 parts of sodium carboxymethyl starch (CMS) and xanthan gum at a ratio of 40:1, adding the CMC solution through a vibrating screen to obtain a matrix solution; Step S3, dispersing 0.3-0.6 parts of polyamide fiber to obtain a polyamide fiber dispersion; Step S4, ultrasonically dispersing and preventing sedimentation of 0.1-0.3 parts of nanocellulose and PEG400 at a ratio of 1:10 to obtain a nanocellulose dispersion; Step S5, hydrolyzing and activating 0.5-1.2 parts of aminopropyltriethoxysilane (KH550) and 0.05-0.1 parts of dibutyltin dilaurate to obtain an activated silane solution; Step S6, performing a chelating reaction on 3-5 parts of polyvinyl butyral (PVB) and 4-6 parts of dioctyl phthalate (DOP) to obtain a chelated solution; Step S7: 8 to 12 parts of expanded perlite, drying the expanded perlite, adding 0.5% aminopropyltriethoxysilane (KH550) solution based on the mass of the expanded perlite and mixing to obtain silane-modified expanded perlite; Step S8, performing centrifugal intercalation treatment on 5-8 parts of nano-montmorillonite and CTAB at a ratio of 1:1.5 to obtain intercalated montmorillonite; Step S9, fusing and mixing the silane-modified expanded perlite and the intercalated montmorillonite to obtain a composite material; Step S10: adding the matrix solution, nanocellulose dispersion, compounding solution and composite material in sequence, mixing and stirring, and extruding through a screw extruder to form.

2. The method for preparing the sculpture craft mud according to claim 1, wherein In step S1, obtaining the CMC solution includes: Determine the dissolution temperature and shear rate according to the mass fraction of sodium carboxymethyl cellulose (CMC); The sodium carboxymethyl cellulose (CMC) is stirred and dissolved using the dissolving temperature and shear rate; Monitor the solution during the dissolution process and control the solution viscosity between 800 and 1200 mPa.s.

3. The method for preparing the sculpture craft mud according to claim 2, wherein In the step S2, obtaining a CMC solution and adding the CMC solution through a vibrating screen to obtain a matrix solution includes: Use an 80-mesh vibrating sieve to sieve the sodium carboxymethyl cellulose (CMC) and add the CMC solution several times, with an interval of 3 minutes; Determine the extended cooking time according to the mass fraction of sodium carboxymethyl starch (CMS); Periodically obtaining a matrix solution curve, and determining the end of adding the CMC solution according to the degree of fit between the matrix solution curve and a standard matrix solution curve; The thixotropic index of the matrix solution is monitored, and if the thixotropic index reaches 1.8 to 2.2, the aging is determined to be terminated.

4. The method for preparing the sculpture craft mud according to claim 1, wherein In step S3, obtaining the polyamide fiber dispersion includes: Determine the dispersion speed and dispersion time according to the mass fraction of the polyamide fiber; The polyamide fiber is dispersed by using a high shear emulsifier at the rotation speed and dispersion time to obtain the polyamide fiber dispersion.

5. The method for preparing the sculpture craft mud according to claim 4, wherein In step S4, obtaining a nanocellulose dispersion comprises: determining ultrasonic parameters according to the mass fraction of the nanocellulose dispersion; After ultrasonic dispersion was completed, 0.1% hydroxypropyl methylcellulose (HPMC) was added; The magnetic stirring was maintained at 2000 rpm until the feeding was completed.

6. The method for preparing the sculpture craft mud according to claim 1, wherein In step S5, obtaining the activated silane solution includes: The pH control range, the mass fraction of dibutyltin dilaurate, and the activation time during the hydrolysis process are determined according to the mass fraction of the aminopropyltriethoxysilane (KH550); The pH control range is 0.4 times the mass fraction of aminopropyltriethoxysilane (KH550) plus 4.

2. The mass fraction of the dibutyltin dilaurate is 8% of the mass fraction of the aminopropyltriethoxysilane (KH550); The activation time is 15 times the mass fraction of the aminopropyltriethoxysilane (KH550), and the unit is min.

7. The method for preparing the sculpture craft mud according to claim 1, wherein In step S6, obtaining the chelating solution includes: determining the dissolution temperature of the polyvinyl butyral (PVB) according to the mass fraction of the polyvinyl butyral (PVB); The polyvinyl butyral (PVB) solvent is selected from anhydrous ethanol and ethyl acetate in a volume ratio of 3:1; Dioctyl phthalate (DOP) was added in several batches at 5-min intervals until the transmittance of the solution was greater than 90%.

8. The method for preparing the sculpture craft mud according to claim 1, wherein In step S7, obtaining the silane-modified expanded perlite includes: Take the mass fraction of the expanded perlite, multiply it by 10 times, and add 50, and determine the calculated result as the drying temperature; The drying time was set to 2 h and the vacuum degree was set to -0.08 MPa.

9. The method for preparing the sculpture craft mud according to claim 1, wherein In the step S8, obtaining the intercalated montmorillonite includes determining the centrifugal speed and the centrifugal time according to the mass fraction of the nano-montmorillonite.

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