CN115259173B - Preparation method of inorganic non-Newtonian fluid - Google Patents
Preparation method of inorganic non-Newtonian fluid Download PDFInfo
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- CN115259173B CN115259173B CN202210849460.6A CN202210849460A CN115259173B CN 115259173 B CN115259173 B CN 115259173B CN 202210849460 A CN202210849460 A CN 202210849460A CN 115259173 B CN115259173 B CN 115259173B
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- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B33/00—Silicon; Compounds thereof
- C01B33/20—Silicates
- C01B33/36—Silicates having base-exchange properties but not having molecular sieve properties
- C01B33/38—Layered base-exchange silicates, e.g. clays, micas or alkali metal silicates of kenyaite or magadiite type
- C01B33/40—Clays
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- B82—NANOTECHNOLOGY
- B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
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- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2006/00—Physical properties of inorganic compounds
- C01P2006/22—Rheological behaviour as dispersion, e.g. viscosity, sedimentation stability
Abstract
The invention discloses a preparation method of an inorganic non-Newtonian fluid, which comprises the following steps: mixing deionized water, sodium bicarbonate, sodium hydroxide, dipotassium hydrogen phosphate, potassium hydroxide and calcium hydroxide to prepare alkali liquor; dropwise adding sodium silicate into alkali liquor under the stirring condition to obtain silica-containing sol; mixing deionized water, magnesium salt, aluminum salt, ferric salt and fluoride to prepare a magnesium-containing aqueous solution; heating the silica-containing sol at a constant temperature of 40-60 ℃, and dropwise adding the magnesium-containing aqueous solution into the silica-containing sol under the stirring condition to obtain a reaction solution; aging the reaction solution at the constant temperature of 100-200 ℃ for 6-48 hours, cooling to room temperature, centrifuging, washing with water, drying to obtain inorganic powder, and adding the inorganic powder into deionized water to prepare suspension, thus obtaining inorganic non-Newtonian fluid; the invention adopts a new formula, integrates the crystal and amorphous preparation technology, obtains the novel inorganic non-Newtonian fluid, has high gelling speed and uniform particle size to nano-scale, and can meet different requirements on viscosity under different shear rates.
Description
Technical Field
The invention relates to a preparation method of an inorganic non-Newtonian fluid.
Background
The magnesium soapstone is a layered magnesium aluminosilicate mineral, its single sheet layer is formed from two layers of silicon oxygen tetrahedron, between which a layer of magnesium oxygen octahedron is sandwiched, and the single sheet layer is negatively charged, and between two sheet layers the hydrated cations can be adsorbed so as to make the laminate charge balance, and its ideal chemical formula is Na x [Mg 6 (Si 8-x Al x )]O 20 (OH) 4 (0.2≤x<1.6)。
Natural pure magnesia is rare and therefore, needs to be synthesized by a manual method. The traditional hydrothermal method for synthesizing the magnesium saponite adopts a general crystal preparation technology and an ideal chemical formula to prepare a reaction solution by material feeding proportioning, and the reaction solution is prepared by crystallization in a high-concentration sodium hydroxide-sodium bicarbonate buffer solution. When the magnesium soapstone crystal is obtained, other mixed crystals are generated, so that the particle size of the product is not uniform, the magnesium soapstone is peeled off in water to reach the nano-scale, and other mixed crystals cannot be peeled off by hydration, and the particle size of the mixed crystals can reach the micro-scale (1-10 microns). The particle size and plate charge can affect the rate of gelation of the magnesium saponite in water, which is slow, typically for at least 1 day or more, and even for more than 7 days.
The magnesium soapstone can be applied to an anti-settling agent, a thickening agent and a rheological agent of water-based paint, but because the gel forming speed is low, sufficient hydration time is needed in use, and the magnesium soapstone is prepared into pre-gel, so that the use efficiency is low, and the application is limited. In addition, viscosity is one of the important parameters for the application of magnesium saponite in aqueous coatings. The viscosity has very important influence on the storage stability, the workability, the thickness of the coating and the quality of the coating film. The paint has good stability when in storage, and has high viscosity and is not easy to delaminate or precipitate; proper medium viscosity is required to be convenient to operate during stirring and pouring; when spraying, brushing and rolling, the viscosity is required to be lower, atomization and leveling are facilitated, meanwhile, when the brushing is stopped, a mark left by a brush can automatically disappear, sagging does not occur, the paint cannot flow down from the surface of an object before being dried, and therefore, the paint is required to have different viscosities at different shear rates and has enough yield stress to overcome the influence of gravity on flow, and therefore, the magnesia water suspension adhesive also needs to meet the requirement of viscosity at different shear rates. Paraffin polyoxyethylene ether (PE-100) is a nonionic surfactant that is commonly added to aqueous coatings to facilitate wetting of pigment fillers. PE-100 is sensitive to the magnesia water suspension, and when the PE-100 and the magnesia water suspension are mixed, the viscosity is reduced, and the rheological behavior of the fluid is changed.
Disclosure of Invention
The invention aims to provide a preparation method of an inorganic non-Newtonian fluid. The magnesium-like saponite and amorphous nano-composite with crystal point defects are formed by the reversible transformation of various indissolvable electrolyte precipitates generated in the reaction liquid and the dissolution of the indissolvable electrolyte precipitates by adopting comprehensive crystal and amorphous preparation technology, and suspension is formed rapidly in an aqueous medium, so that the magnesium-like saponite and amorphous nano-composite is a novel inorganic non-Newtonian fluid.
The technical scheme of the invention is as follows:
a method for preparing an inorganic non-newtonian fluid comprising the steps of:
(1) Mixing deionized water, sodium bicarbonate, sodium hydroxide, dipotassium hydrogen phosphate, potassium hydroxide and calcium hydroxide to prepare alkali liquor;
the mass ratio of the deionized water to the sodium bicarbonate to the sodium hydroxide to the dipotassium hydrogen phosphate to the potassium hydroxide to the calcium hydroxide is 390-530:43-50:24-28:5.0-8.0:1.7-2.8:1, a step of;
(2) Dropwise adding water glass into the alkali liquor prepared in the step (1) under the stirring condition to obtain silica-containing sol; mixing deionized water, magnesium salt, aluminum salt, ferric salt and fluoride to prepare a magnesium-containing aqueous solution; heating the silica-containing sol at a constant temperature of 40-60 ℃, and dropwise adding the magnesium-containing aqueous solution into the silica-containing sol under the stirring condition to obtain a reaction solution;
the mass ratio of the water glass to the alkali liquor is 1:7.3-10.3;
the deionized water, the water glass, the magnesium salt, the fluoride, the ferric salt and the aluminum salt are in the molar ratio of 770-1875:16-25:14-27:2.5-6.4:0.15-0.30:1, a step of;
the molar ratio of the sum of the sodium silicate, the aluminum salt and the ferric salt to magnesium is 0.9-1.3:1, a step of;
the magnesium salt is any one of magnesium chloride and magnesium nitrate;
the fluoride is any one of sodium fluoride and ammonium fluoride;
the aluminum salt is any one of aluminum chloride and aluminum nitrate;
the ferric salt is any one of ferric chloride and ferric nitrate;
(3) Aging the reaction liquid obtained in the step (2) for 6-48 hours at the constant temperature of 100-200 ℃, cooling to room temperature, centrifuging, washing with water, and drying (at 40-80 ℃ for 6-24 hours) to obtain inorganic powder; adding inorganic powder into deionized water to prepare suspension, thus obtaining the inorganic non-Newtonian fluid;
the mass fraction of the inorganic powder in the suspension is 2-5%;
the chemical composition of the inorganic powder is as follows: siO (SiO) 2 50-58％,MgO 30-39％,Al 2 O 3 1.7-2.8％,Fe 2 O 3 0.5-0.8％,Na 2 O 3.5-4.5％,CaO 1.5-2.0％,K 2 O 0.4-0.6％,F 2-4％,P 2 O 5 0.4-0.6％。
The rheological behavior of the inorganic non-Newtonian fluid prepared by the invention accords with a non-Newtonian fluid Sisko equation and a Cross equation, and the fitting correlation coefficient of the equation is more than 0.98.
The Sisko equation is η=η ∞ +Kγ n-1
Wherein eta is shear viscosity and Pa.s; η (eta) ∞ Is infinite shear viscosity, pa·s, corresponding to an approximate limiting viscosity at extremely high shear rates; k is a specific material parameter; gamma is the shear rate, s –1 N is a non-Newtonian parameter reflecting the strength of the non-Newtonian property of the fluid, n<1 represents a pseudoplastic fluid.
Cross equation is
Wherein eta is shear viscosity and Pa.s; η (eta) 0 、η ∞ Zero shear viscosity, infinite shear viscosity, pa·s, equivalent to near limiting viscosity at very low and very high shear rates, respectively; lambda is a specific material parameter; gamma is the shear rate, s –1 M is a non-Newtonian parameter and represents the intensity of non-Newtonian.
Compared with the prior art, the invention has the beneficial effects that:
the traditional technology for hydrothermally synthesizing the magnesia adopts a general crystal preparation technology, aims to obtain perfect magnesia crystals, and generally adopts an ideal chemical formula Na x [Mg 6 (Si 8-x Al x )]O 20 (OH) 4 (0.2≤x<1.6 Preparing reaction liquid by charging and proportioning, crystallizing in a high-concentration sodium hydroxide-sodium bicarbonate buffer solution, mixing other mixed crystals at the same time of obtaining the magnesium saponite crystal, so that the particle size of the product is nonuniform, the magnesium saponite is stripped in water to reach the nano-scale, the other mixed crystals can reach the micro-scale (1-10 microns), the gelling speed of the product is low, generally at least 24 hours is higher, even more than 7 days are needed, and the application efficiency is lowLimited use and low overall viscosity.
The preparation method of the inorganic non-Newtonian fluid provided by the invention adopts a new formula of a reaction liquid, integrates the crystal and amorphous preparation technology, obtains the novel inorganic non-Newtonian fluid, has high gelling speed, and uniform particle size to nano-scale in deionized water after gelling for 30min-1h, can meet different requirements of the water-based paint on viscosity in the construction processes of storage, stirring and pouring, and maintains the rheological behavior unchanged after adding PE-100 with the mass of 0.02% -0.004%, and maintains the stability of viscosity in a water-based medium. The inorganic non-Newtonian fluid prepared by the invention can be applied to the fields of water-based paint, cosmetics, architecture, polymer emulsion and the like, and has the functions of rheology, anti-settling and thickening.
Detailed Description
The present invention is further described below by way of specific examples, but the scope of the present invention is not limited thereto.
The water glass used in the examples was purchased from Jiangsu Chemicals, inc., with a silica content of 27% and a sodium hydroxide content of 14%.
Example 1
The preparation method of the inorganic non-Newtonian fluid comprises the following steps:
1) The mass ratio of deionized water, sodium bicarbonate, sodium hydroxide, dipotassium hydrogen phosphate, potassium hydroxide and calcium hydroxide is 458:47:26:5.2:1.8:1, 110g of deionized water, 11.2g of sodium bicarbonate, 6.22g of sodium hydroxide, 1.24g of dipotassium hydrogen phosphate, 0.43g of potassium hydroxide and 0.24g of calcium hydroxide are mixed to prepare alkali liquor. The concentration of sodium hydroxide is 1.21mol/L, the concentration of sodium bicarbonate is 1.41mol/L, the concentration of potassium hydroxide is 0.069mol/L, the concentration of dipotassium hydrogen phosphate is 0.065mol/L, and the concentration of calcium hydroxide is 0.029mol/L.
2) 12.55g of water glass is added dropwise to the alkali solution prepared in the step 1) under stirring, so as to obtain silica sol.
3) The molar ratio of magnesium salt to magnesium to fluoride to iron and aluminum salt to aluminum is 794 based on deionized water and step 2) sodium silicate to silicon: 16.2:16.6:3.1:0.17:1, according to the step 2), the total of aluminum salt and ferric salt calculated by silicon contained and the mol ratio of magnesium salt calculated by magnesium contained are 1.04, 50g of deionized water, 11.8g of magnesium chloride hexahydrate, 1.31g of aluminum nitrate hexahydrate, 0.16g of ferric chloride hexahydrate and 0.45g of sodium fluoride are mixed to prepare a magnesium-containing aqueous solution, wherein the concentration of magnesium ions is 1.02mol/L, the concentration of fluorine ions is 0.19mol/L, the concentration of aluminum ions is 0.061mol/L and the concentration of ferric ions is 0.010mol/L.
4) Heating the silica sol prepared in the step 2) at a constant temperature of 40 ℃, and rapidly dripping the magnesium-containing aqueous solution prepared in the step 3) into the silica sol prepared in the step 2) under the stirring condition to obtain a reaction solution.
5) Adding the reaction solution obtained in the step 4) into a reaction kettle, aging for 24 hours at the constant temperature of 100 ℃, cooling to room temperature, centrifuging, washing with water, drying (80 ℃ for 12 hours) to obtain inorganic powder, and obtaining the inorganic powder by elemental analysis, wherein the chemical composition is SiO 2 50.82％,MgO 34.88％,Al 2 O 3 2.70％,Fe 2 O 3 0.73％,Na 2 O 4.42％,CaO 1.88％,K 2 O 0.44％，F 3.05％,P 2 O 5 0.54 percent of deionized water is added according to the powder weight fraction of 2 percent, and the mixture is stirred uniformly and is stood for 1 hour to form gel, thus obtaining the inorganic non-Newtonian fluid.
Example 2
1) The mass ratio of deionized water, sodium bicarbonate, sodium hydroxide, dipotassium hydrogen phosphate, potassium hydroxide and calcium hydroxide is 400:45:25:5.3:1.8:1, 100g of deionized water, 11.2g of sodium bicarbonate, 6.21g of sodium hydroxide, 1.32g of dipotassium hydrogen phosphate, 0.46g of potassium hydroxide and 0.25g of calcium hydroxide are mixed to prepare alkali liquor. The concentration of sodium hydroxide is 1.33mol/L, the concentration of sodium bicarbonate is 1.55mol/L, the concentration of potassium hydroxide is 0.081mol/L, the concentration of dipotassium hydrogen phosphate is 0.076mol/L, and the concentration of calcium hydroxide is 0.034mol/L.
2) Dropwise adding 13.58g of water glass into the alkali liquor prepared in the step 1) under the stirring condition to obtain silica sol;
3) The molar ratio of magnesium salt to magnesium to fluoride to iron and aluminum salt to aluminum is 780:17.2:14.2:3.4:0.17:1, according to the step 2), 50g of deionized water, 12.9g of magnesium nitrate hexahydrate, 0.86g of aluminum chloride hexahydrate, 0.28g of ferric nitrate nonahydrate and 0.45g of ammonium fluoride are mixed to prepare a magnesium-containing aqueous solution, wherein the total of aluminum salt and ferric salt calculated by aluminum content and iron content calculated by silicon content and the molar ratio of magnesium salt to magnesium salt calculated by magnesium content is 1.30, the magnesium ion concentration is 0.90mol/L, the fluorine ion concentration is 0.22mol/L, the aluminum ion concentration is 0.064mol/L, and the ferric ion concentration is 0.012mol/L.
4) Heating the silica sol prepared in the step 2) at the constant temperature of 50 ℃, and rapidly dripping the magnesium-containing aqueous solution prepared in the step 3) into the silica sol prepared in the step 2) under the stirring condition to obtain a reaction solution.
5) Adding the reaction solution obtained in the step 4) into a reaction kettle, aging for 18 hours at the constant temperature of 150 ℃, cooling to room temperature, centrifuging, washing with water, drying (60 ℃ for 18 hours) to obtain inorganic powder, and obtaining the inorganic powder by elemental analysis, wherein the chemical composition is SiO 2 55.00％,MgO 30.25％,Al 2 O 3 2.75％,Fe 2 O 3 0.80％,Na 2 O 4.46％,CaO 1.94％,K 2 O 0.47％，F 3.49％,P 2 O 5 0.57 percent of deionized water is added according to the powder weight fraction of 3 percent, and the mixture is stirred uniformly and is stood for 50 mm to form gel, thus obtaining the inorganic non-Newtonian fluid.
Example 3
1) The mass ratio of deionized water, sodium bicarbonate, sodium hydroxide, dipotassium hydrogen phosphate, potassium hydroxide and calcium hydroxide is 455:49:27:5.1:1.8:1, 100g of deionized water, 10.8g of sodium bicarbonate, 5.99g of sodium hydroxide, 1.12g of dipotassium hydrogen phosphate, 0.39g of potassium hydroxide and 0.22g of calcium hydroxide are mixed to prepare alkali liquor. The concentration of sodium hydroxide is 1.28mol/L, the concentration of sodium bicarbonate is 1.50mol/L, the concentration of potassium hydroxide is 0.069mol/L, the concentration of dipotassium hydrogen phosphate is 0.065mol/L, and the concentration of calcium hydroxide is 0.030mol/L.
2) Dropwise adding 12.96g of water glass into the alkali liquor prepared in the step 1) under the stirring condition to obtain silica sol;
3) The molar ratio of magnesium salt to magnesium to fluoride to iron and aluminum salt to aluminum to silicon to be contained in deionized water and step 2) sodium silicate to fluorine to be contained in the sodium silicate is 1018:19.3:19.5:2.5:0.17:1, according to the step 2), the total of aluminum salt and ferric salt calculated by silicon contained and the mol ratio of magnesium salt calculated by magnesium contained are 1.05, deionized water 55g, magnesium chloride hexahydrate 11.98g, aluminum chloride hexahydrate 0.73g, ferric chloride hexahydrate 0.14g and sodium fluoride 0.32g are mixed to prepare magnesium-containing aqueous solution, wherein the magnesium ion concentration is 0.95mol/L, the fluorine ion concentration is 0.12mol/L, the aluminum ion concentration is 0.049mol/L and the ferric ion concentration is 0.008mol/L.
4) Heating the silica sol prepared in the step 2) at the constant temperature of 50 ℃, and rapidly dripping the magnesium-containing aqueous solution prepared in the step 3) into the silica sol prepared in the step 2) under the stirring condition to obtain a reaction solution.
5) Adding the reaction solution obtained in the step 4) into a reaction kettle, aging for 12 hours at the constant temperature of 180 ℃, cooling to room temperature, centrifuging, washing with water, drying (60 ℃ for 20 hours) to obtain inorganic powder, and obtaining the inorganic powder by elemental analysis, wherein the chemical composition is SiO 2 52.49％,MgO 35.36％,Al 2 O 3 2.30％,Fe 2 O 3 0.64％,Na 2 O 4.30％,CaO 1.70％,K 2 O 0.40％，F 2.16％,P 2 O 5 0.45 percent of deionized water is added according to the powder weight fraction of 4 percent, and the mixture is stirred uniformly and is stood for 30 mm to form gel, thus obtaining the inorganic non-Newtonian fluid.
Example 4
1) The mass ratio of deionized water, sodium bicarbonate, sodium hydroxide, dipotassium hydrogen phosphate, potassium hydroxide and calcium hydroxide is 474:45:25:7.7:2.7:1, 90g of deionized water, 8.5g of sodium bicarbonate, 4.72g of sodium hydroxide, 1.46g of dipotassium hydrogen phosphate, 0.50g of potassium hydroxide and 0.19g of calcium hydroxide are mixed to prepare alkali liquor. The concentration of sodium hydroxide is 1.12mol/L, the concentration of sodium bicarbonate is 1.31mol/L, the concentration of potassium hydroxide is 0.10mol/L, the concentration of dipotassium hydrogen phosphate is 0.095mol/L, and the concentration of calcium hydroxide is 0.029mol/L.
2) Dropwise adding 12.63g of water glass into the alkali liquor prepared in the step 1) under the stirring condition to obtain silica sol;
3) The molar ratio of magnesium salt to magnesium to fluoride to iron and aluminum salt to aluminum is 1539 in terms of deionized water, step 2) sodium silicate to silicon to magnesium to fluoride to iron: 24.2:27.0:3.0:0.24:1, according to the step 2), the total of aluminum salt and ferric salt calculated by silicon and the mol ratio of magnesium salt calculated by magnesium and magnesium salt calculated by iron is 0.94, deionized water 65g, magnesium nitrate hexahydrate 16.23g, aluminum nitrate nonahydrate 0.88g, ferric nitrate nonahydrate 0.23g and ammonium fluoride 0.26g are mixed to prepare magnesium-containing aqueous solution, wherein the concentration of magnesium ions is 0.88mol/L, the concentration of fluorine ions is 0.10mol/L, the concentration of aluminum ions is 0.033mol/L and the concentration of ferric ions is 0.08mol/L.
4) Heating the silica sol prepared in the step 2) at a constant temperature of 60 ℃, and rapidly dripping the magnesium-containing aqueous solution prepared in the step 3) into the silica sol prepared in the step 2) under the stirring condition to obtain a reaction solution.
5) Adding the reaction solution obtained in the step 4) into a reaction kettle, aging for 6 hours at the constant temperature of 200 ℃, cooling to room temperature, centrifuging, washing with water, drying (50 ℃ for 48 hours) to obtain inorganic powder, and obtaining the inorganic powder by elemental analysis, wherein the chemical composition is SiO 2 51.14％,MgO 37.99％,Al 2 O 3 1.80％,Fe 2 O 3 0.67％,Na 2 O 3.50％,CaO 1.50％,K 2 O 0.52％，F 2.00％,P 2 O 5 0.40 percent of deionized water is added according to the weight percent of 5 percent of powder, and the mixture is stirred uniformly and is stood for 40 minutes to form gel, thus obtaining the inorganic non-Newtonian fluid.
Table 1: rheological behavior models and rheological parameters of inorganic non-newtonian fluids prepared in examples 1-4.
Comparative example
Methods for preparing magnesium soapstone in the literature (Cunjun Li, qiai Wu, sabine Petit, will P.gates, huimin Yang, weihua Yu, and Chunhui Zhou, insights into the Rheological Behavior of Aqueous Dispersions of Synthetic Saponite: effects of Saponite Composition and Sodium Polyacrylate, langmuir 2019,35,13040-13052):
(1) 36.3g NaOH and 65.6g NaHCO were reacted 3 Solution A was prepared by dissolving in 500mL deionized water.
(2) 88.83g of sodium silicate was added to 490mL of solution A to give solution B.
(3) Magnesium chloride and aluminum chloride were dissolved in 175mL deionized water at Si/Al molar ratios of 5, 10, 15, 20, 25, respectively, to give solution C.
(4) And (3) dropwise adding the solution C into the solution B to obtain a crystallization liquid. The mass of Si, mg and Al atoms in the crystallization liquid is according to the ideal chemical composition (Na, mg) of the magnesium saponite x [Mg 6 ][Si 8-x Al x ]O 20 (OH) 4 Metering in. Adding deionized water into 3% of magnesium saponite by mass percent, standing for 7 days to form gel, and shearing at a rate of 0.1-100s -1 The rheological behavior of the composition meets the Sisko equation when the shear rate is 100s -1 At this time, the magnesium saponite hydrogel approaches infinite shear viscosity.
The fluid of the embodiment of the invention is glued in deionized water for 30min-1h at a shear rate of 0.03-157s -1 The rheological behavior of the composition meets the Sisko equation when the shear rate is 500s -1 At this time, the magnesium saponite hydrogel approaches infinite shear viscosity, and the overall viscosity of the fluid is high compared to the comparative example.
Claims (5)
1. A method for preparing an inorganic non-newtonian fluid, comprising the steps of:
(1) Mixing deionized water, sodium bicarbonate, sodium hydroxide, dipotassium hydrogen phosphate, potassium hydroxide and calcium hydroxide to prepare alkali liquor;
the mass ratio of the deionized water to the sodium bicarbonate to the sodium hydroxide to the dipotassium hydrogen phosphate to the potassium hydroxide to the calcium hydroxide is 390-530:43-50:24-28:5.0-8.0:1.7-2.8:1, a step of;
(2) Dropwise adding water glass into the alkali liquor prepared in the step (1) under the stirring condition to obtain silica-containing sol; mixing deionized water, magnesium salt, aluminum salt, ferric salt and fluoride to prepare a magnesium-containing aqueous solution; heating the silica-containing sol at a constant temperature of 40-60 ℃, and dropwise adding the magnesium-containing aqueous solution into the silica-containing sol under the stirring condition to obtain a reaction solution;
the mass ratio of the water glass to the alkali liquor is 1:7.3-10.3;
the deionized water, the water glass, the magnesium salt, the fluoride, the ferric salt and the aluminum salt are in the molar ratio of 770-1875:16-25:14-27:2.5-6.4:0.15-0.30:1, a step of;
the molar ratio of the sum of the sodium silicate, the aluminum salt and the ferric salt to magnesium is 0.9-1.3:1, a step of;
(3) Aging the reaction liquid obtained in the step (2) for 6-48 hours at the constant temperature of 100-200 ℃, cooling to room temperature, centrifuging, washing with water, and drying to obtain inorganic powder; adding inorganic powder into deionized water to prepare suspension, thus obtaining the inorganic non-Newtonian fluid;
the mass fraction of the inorganic powder in the suspension is 2-5%.
2. The method of claim 1, wherein in step (2), the magnesium salt is any one of magnesium chloride and magnesium nitrate.
3. The method of preparing an inorganic non-newtonian fluid according to claim 1, wherein in step (2), the fluoride is any one of sodium fluoride and ammonium fluoride.
4. The method for preparing an inorganic non-newtonian fluid according to claim 1, wherein in step (2), the aluminum salt is any one of aluminum chloride and aluminum nitrate.
5. The method of claim 1, wherein in step (2), the iron salt is any one of ferric chloride and ferric nitrate.
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