Dispersing anti-coagulation material for powder surface treatment and preparation method of dispersing anti-coagulation material

Abstract

The invention discloses a dispersion and coagulation inhibition material for powder surface treatment and a preparation method thereof, the dispersion and coagulation inhibition material comprises the following components in parts by weight: 100-200 parts of polyethylene glycol (PEG) derivative, the molecular weight of the PEG derivative is 200-6000, the terminal is modified with amino, carboxyl or epoxy group, 50-150 parts of polyacrylate (PAAS), the molecular weight of PAAS is 3000-8000, 30-80 parts of fatty alcohol ether (FAE), the FAE is C12-C18 fatty alcohol-polyoxyethylene ether, the HLB value is 8-12, and the dispersion and coagulation inhibition material is a dispersion and coagulation inhibition material for powder surface treatment. And 5-20 parts of an auxiliary additive. The dispersion coagulant inhibitor provided by the invention can significantly reduce the oil absorption value of the powder, and the reduction amplitude can reach 20-40%. The main action mechanism is as follows: a flexible chain segment of the polyethylene glycol derivative forms an oleophobic layer on the surface of the powder, and the oleophobic layer can effectively block contact between oil molecules and the surface of the powder; meanwhile, the fatty alcohol ether further inhibits adsorption of oil molecules through hydrophobic groups and a steric hindrance effect in a molecular structure of the fatty alcohol ether. And the oil absorption value is greatly reduced due to the synergistic effect of the two components.

Description

Technical Field

[0001] The present invention relates to the technical field of powder materials, in particular to a dispersed anti-coagulation material for powder surface treatment and a preparation method thereof. Background Art

[0002] Powder materials, as essential raw materials in industrial production, play a key role in numerous fields. However, their inherent properties present numerous challenges in practical application. Powder materials such as titanium dioxide, calcium carbonate, talc, and silica, due to their large surface area and high surface energy, are prone to agglomeration. This agglomeration not only makes it difficult to disperse the powder during use but also negatively impacts various performance characteristics of the application system.

[0003] From the perspective of oil absorption, traditional powders typically have an oil absorption value in the range of 25-35 ml / 100 g. Higher oil absorption values ​​directly affect the fluidity of the application system, increasing the system viscosity and, in turn, negatively impacting processing performance. For example, in paint production, high powder oil absorption increases the viscosity, making application more difficult and potentially affecting coating performance. In plastics processing, this can impair the fluidity of the plastic melt, increase processing energy consumption, and even affect the quality of the finished product.

[0004] To this end, we propose a dispersed anti-coagulation material for powder surface treatment and a preparation method thereof. Summary of the Invention

[0005] In view of the shortcomings of the prior art, the purpose of the present invention is to provide a dispersed anti-coagulation material for powder surface treatment and a preparation method thereof, which has solved the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solution: a dispersed anti-coagulation material for powder surface treatment and a preparation method thereof, which comprises, by weight: 100-200 parts of a polyethylene glycol (PEG) derivative, wherein the PEG derivative has a molecular weight of 200-6000 and is terminally modified with an amino group, a carboxyl group or an epoxy group; 50-150 parts of a polyacrylate (PAAS), wherein the PAAS has a molecular weight of 3000-8000; 30-80 parts of a fatty alcohol ether (FAE), wherein the FAE is a C12-C18 fatty alcohol polyoxyethylene ether with an HLB value of 8-12; 5-20 parts of an auxiliary additive, wherein the auxiliary additive is a silane coupling agent or a phosphate ester; 10-30 parts of nano-silica, wherein the particle size is 5-50 nm, and the surface is pretreated with a silane coupling agent.

[0007] Preferably, the weight ratio of the PEG derivative to PAAS is 2:1 to 4:1, and the degree of modification of the terminal functional groups of the PEG derivative is ≥90%.

[0008] Preferably, the silane coupling agent is KH-570 or KH-560, and the auxiliary additive forms a hydrogen bond network in the system.

[0009] Preferably, the particle size of the nano-silicon dioxide is 10-30 nm, and the surface hydroxyl density is ≥ 4 / nm 2 ;

[0010] A method for preparing a dispersed anticoagulant comprises the following steps:

[0011] A. Precursor complexation: PEG derivatives and PAAS are reacted at 60-80°C, pH 7-8, and stirring at 300-500 rpm for 2-3 hours while nitrogen is introduced to form an amphoteric polymer complex.

[0012] B. Dispersion modification: FAE and nano-silica were added, and ultrasonic dispersion was performed at a power of 200-300 W and a frequency of 40-60 kHz for 30-45 minutes, with the ultrasonic energy density controlled at 0.8-1.2 W / mL to form a homogeneous solution;

[0013] C. Curing and molding: A white powder product is obtained by spray drying (the inlet temperature is increased by a gradient, initially at 150°C, maintained for 30 minutes, then increased to 180°C, and the outlet temperature is 80-90°C) or freeze drying (the material is liquid at room temperature).

[0014] Preferably, the ultrasonic dispersion power is 250W, the frequency is 50kHz, the time is 35 minutes, and the solid content of the solution is controlled at 10-15%;

[0015] A powder material treated with a dispersed anticoagulant, characterized by:

[0016] S1, oil absorption value is reduced by 20-40% compared with untreated powder and ≤20ml / 100g;

[0017] S2. The sedimentation rate in an aqueous system is ≤15% after 30 days, and the absolute value of the zeta potential in a 0.1 mol / L NaCl solution is ≥35 mV;

[0018] S3, surface contact angle ≤ 30°, and surface energy matching coefficient γ ≤ 0.3;

[0019] S4. After 100 cycles of testing within the temperature range of -40°C to 120°C, the increase in sedimentation rate is ≤5%.

[0020] Preferably, the powder material is titanium dioxide, calcium carbonate, talc or nano-scale silicon dioxide, and the particle size distribution PDI of the nano-scale powder after treatment is ≤0.25.

[0021] Preferably, when the powder material is used as a medical filler, the heavy metal content is ≤0.01ppm and the microbial limit is ≤100CFU / g; when it is used as a lithium battery separator, the ion conductivity is ≥10-3S / cm;

[0022] A method for preparing a dispersed anti-coagulation material for powder surface treatment, comprising the following preparation steps:

[0023] A. Precursor complexation: PEG derivatives and PAAS are reacted at 60-80°C, pH 7-8, and stirring at 300-500 rpm for 2-3 hours while nitrogen is introduced to form an amphoteric polymer complex.

[0024] B. Dispersion modification: FAE and nano-silica were added, and ultrasonic dispersion was performed at a power of 200-300 W and a frequency of 40-60 kHz for 30-45 minutes, with the ultrasonic energy density controlled at 0.8-1.2 W / mL to form a homogeneous solution;

[0025] C. Curing and molding: A white powder product is obtained by spray drying (the inlet temperature is increased by a gradient, initially at 150°C, maintained for 30 minutes, then increased to 180°C, and the outlet temperature is 80-90°C) or freeze drying (the material is liquid at room temperature).

[0026] Compared with the prior art, the present invention provides a dispersed anti-coagulation material for powder surface treatment and a preparation method thereof, which has the following beneficial effects:

[0027] 1. The dispersing anticoagulant of the present invention can significantly reduce the oil absorption value of the powder, with a reduction of up to 20-40%. Its mechanism of action is mainly that the flexible chain segments of the polyethylene glycol derivative form an oleophobic layer on the surface of the powder, which can effectively block the contact between the oil molecules and the powder surface; at the same time, the fatty alcohol ether further inhibits the adsorption of oil molecules through the hydrophobic groups and steric hindrance effects in its molecular structure. The two act synergistically to achieve a significant reduction in the oil absorption value. For example, for titanium dioxide (R-902), the oil absorption value is 28ml / 100g when untreated. After being treated with the dispersing anticoagulant of the present invention, the oil absorption value can be reduced to 18ml / 100g. The addition of nano-silica can form a denser oleophobic layer on the surface of the powder, further improving the effect of reducing the oil absorption value;

[0028] 2. The present invention shows excellent dispersion stability in both aqueous systems and organic solvents by treating the powder with a dispersion inhibitor. Taking the sedimentation rate of 30 days as an example, the sedimentation rate of the treated titanium dioxide is 15%, that of calcium carbonate is 10%, and that of talc is 12%. Its stabilization mechanism is mainly based on the following three aspects: on the one hand, polyacrylate ionizes carboxyl anions in water, causing the surface of the powder particles to carry a negative charge, generating a strong electrostatic repulsion, thereby preventing the particles from approaching and agglomerating with each other; on the other hand, the steric hindrance layer formed by the polyethylene glycol derivative on the powder surface can also effectively hinder the agglomeration of the particles; in addition, the addition of nano-silica can fill in between the powder particles, further increasing the steric hindrance between the particles, thereby improving the dispersion stability. The synergistic effect of electrostatic repulsion and steric hindrance enables the powder to maintain a long-term stable dispersion state in the medium. In addition, polyacrylate has a strong resistance to electrolyte interference and can maintain good dispersion stability even in a medium containing a certain electrolyte.

[0029] 3. The dispersing anticoagulant of the present invention can significantly improve the surface wettability of the powder. Through testing, it was found that the surface tension of the powder after treatment was reduced from 60-70mN / m to 25-35mN / m, and the contact angle was reduced from 65° before treatment to about 28°. This is mainly due to the addition of fatty alcohol ethers. The hydrophilic groups and hydrophobic groups in their molecular structure can form a directional arrangement on the surface of the powder, thereby reducing the surface tension of the powder. The lower surface tension allows the powder to be infiltrated by media such as aqueous systems faster and more fully, thereby improving its wettability. The addition of nano-silica can increase the roughness of the powder surface, thereby further improving the wettability. This good wettability is crucial for the application of powders in coatings, inks and other fields. It can improve the compatibility of powders with the matrix, thereby improving the performance of the product;

[0030] 4. The dispersible anticoagulant of the present invention maintains excellent dispersion stability within a temperature range of -40°C to 120°C. This is primarily due to the excellent temperature resistance of the polyethylene glycol derivative, which allows it to maintain its steric hindrance even in extreme temperature environments. Furthermore, the electrostatic repulsion of the polyacrylate also maintains stability in extreme temperature environments. Furthermore, the addition of nano-silica forms a rigid skeleton structure, thereby enhancing the stability of the dispersible anticoagulant in extreme temperature environments.

[0031] 5. The dispersing and anti-coagulant agent of the present invention achieves efficient dispersion. This is primarily due to the addition of nano-silica, whose particle size is comparable to that of the nano-powder material, creating a good steric hindrance. Furthermore, the synergistic effect of the polyethylene glycol derivative and polyacrylate provides sufficient electrostatic repulsion and steric hindrance, thereby inhibiting the agglomeration of the nano-powder material. DETAILED DESCRIPTION

[0032] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0033] Secondly, the term "one embodiment" or "embodiment" herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in various places throughout this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive of other embodiments.

[0034] Example 1:

[0035] A dispersed anti-coagulation material for powder surface treatment and a preparation method thereof, comprising, by weight: 120 parts of a polyethylene glycol (PEG) derivative, wherein the PEG derivative has a molecular weight of 200-6000 and is terminally modified with an amino group, a carboxyl group, or an epoxy group; 80 parts of polyacrylate (PAAS), wherein the PAAS has a molecular weight of 3000-8000; 50 parts of fatty alcohol ether (FAE), wherein the FAE is a C12-C18 fatty alcohol polyoxyethylene ether with an HLB value of 8-12; 10 parts of an auxiliary additive, wherein the auxiliary additive is a silane coupling agent or a phosphate ester; and 20 parts of nano-silicon dioxide, wherein the particle size is 5-50 nm and the surface of the nano-silicon dioxide is pretreated with the silane coupling agent.

[0036] The weight ratio of the PEG derivative to PAAS is 2:1 to 4:1, and the degree of modification of the terminal functional groups of the PEG derivative is ≥90%;

[0037] The silane coupling agent is KH-570 or KH-560, and the auxiliary additive forms a hydrogen bond network in the system;

[0038] The particle size of nano-silica is 10-30nm, and the surface hydroxyl density is ≥4 / nm 2 ;

[0039] The ultrasonic dispersion power was 250W, the frequency was 50kHz, the time was 35 minutes, and the solid content of the solution was controlled at 10-15%;

[0040] The powder material is titanium dioxide, calcium carbonate, talc or nano-silicon dioxide, and the particle size distribution PDI of the nano-powder after treatment is ≤ 0.25;

[0041] When powder materials are used as pharmaceutical fillers, the heavy metal content is ≤0.01ppm and the microbial limit is ≤100CFU / g; when used as lithium battery separators, the ionic conductivity is ≥10-3S / cm;

[0042] A method for preparing a dispersed anti-coagulation material for powder surface treatment, comprising the following preparation steps:

[0043] PEG-6000 (terminal amino) and PAAS were added to a reactor and stirred for reaction at 70°C for 2.5 hours. The pH of the reaction system was controlled to 7.5 to form an amphoteric polymer complex. C16 fatty alcohol ether, KH-560 and nano-silica were added to the reactor. The reaction system was then transferred to an ultrasonic dispersion device and ultrasonically dispersed for 35 minutes at a power of 250W and a frequency of 50kHz to form a homogeneous solution. The homogeneous solution was transferred to a spray dryer for spray drying. The inlet temperature was controlled to 160°C and the outlet temperature was controlled to 85°C to obtain a white powdery dispersing retarder. The obtained dispersing retarder was mixed with titanium dioxide (R-902) at a solid content of 3%, the mixture was added to a ball mill, and ball milled at a speed of 500rpm for 2 hours. The mixture was then dried at 80°C to complete the modification of the titanium dioxide.

[0044] The effect is: the oil absorption value is reduced from 28ml / 100g to 17ml / 100g, a decrease of 39.3%. When the modified titanium dioxide is applied to water-based paint, the viscosity of the paint is reduced by 28%, which makes the paint smoother and easier to apply during the construction process. After 6 months of storage testing, there is no sedimentation of the paint, which proves that the modified titanium dioxide has excellent dispersion stability in water-based paint. In the temperature range of -40℃ to 120℃, the dispersion stability of the paint is good and no sedimentation occurs.

[0045] Example 2:

[0046] A dispersed anti-coagulation material for powder surface treatment and a preparation method thereof, comprising, by weight: 150 parts of a polyethylene glycol (PEG) derivative, wherein the PEG derivative has a molecular weight of 200-6000 and is terminally modified with an amino group, a carboxyl group, or an epoxy group; 100 parts of polyacrylate (PAAS), wherein the PAAS has a molecular weight of 3000-8000; 60 parts of fatty alcohol ether (FAE), wherein the FAE is a C12-C18 fatty alcohol polyoxyethylene ether with an HLB value of 8-12; 15 parts of an auxiliary additive, wherein the auxiliary additive is a silane coupling agent or a phosphate ester; and 25 parts of nano-silicon dioxide, wherein the particle size is 5-50 nm and the surface of the nano-silicon dioxide is pretreated with the silane coupling agent.

[0047] The weight ratio of the PEG derivative to PAAS is 2:1 to 4:1, and the degree of modification of the terminal functional groups of the PEG derivative is ≥90%;

[0048] The silane coupling agent is KH-570 or KH-560, and the auxiliary additive forms a hydrogen bond network in the system;

[0049] The particle size of nano-silica is 10-30nm, and the surface hydroxyl density is ≥4 / nm 2 ;

[0050] The ultrasonic dispersion power was 250W, the frequency was 50kHz, the time was 35 minutes, and the solid content of the solution was controlled at 10-15%;

[0051] The powder material is titanium dioxide, calcium carbonate, talc or nano-silicon dioxide, and the particle size distribution PDI of the nano-powder after treatment is ≤ 0.25;

[0052] When the powder material is used as a pharmaceutical filler, the heavy metal content is ≤0.01ppm and the microbial limit is ≤100CFU / g; when used as a lithium battery separator, the ionic conductivity is ≥10-3S / cm.

[0053] A dispersed anti-coagulation material for powder surface treatment and a preparation method thereof, comprising the following preparation steps:

[0054] PEG-4000 (carboxylated) and PAAS were placed in a reactor and stirred at 65°C for 3 hours. The pH was adjusted to 7.8 to obtain an amphoteric polymer complex. C12 fatty alcohol ether and nano-silica were added and ultrasonically dispersed (power 250W, frequency 50kHz, 35 minutes) to form a homogeneous solution. The homogeneous solution was freeze-dried to prepare a dispersed anticoagulant. 4% modified calcium carbonate was added to PVC resin, mixed evenly, and then extruded.

[0055] The effect is: during the extrusion process, the processing torque decreased by 22%, which means that the processing process is smoother and energy consumption is reduced. The surface gloss of the product is improved by 18%, which improves the appearance quality of the product. In the temperature range of -40℃ to 120℃, the mechanical properties of the product are stable and there is no obvious change.

[0056] Example 3:

[0057] A dispersed anti-coagulation material for powder surface treatment and a preparation method thereof, comprising, by weight: 180 parts of a polyethylene glycol (PEG) derivative, wherein the PEG derivative has a molecular weight of 200-6000 and is terminally modified with an amino group, a carboxyl group, or an epoxy group; 120 parts of polyacrylate (PAAS), wherein the PAAS has a molecular weight of 3000-8000; 60 parts of fatty alcohol ether (FAE), wherein the FAE is a C12-C18 fatty alcohol polyoxyethylene ether with an HLB value of 8-12; 20 parts of an auxiliary additive, wherein the auxiliary additive is a silane coupling agent or a phosphate ester; and 30 parts of nano-silicon dioxide, wherein the particle size is 5-50 nm and the surface of the nano-silicon dioxide is pretreated with the silane coupling agent.

[0058] The weight ratio of the PEG derivative to PAAS is 2:1 to 4:1, and the degree of modification of the terminal functional groups of the PEG derivative is ≥90%;

[0059] The silane coupling agent is KH-570 or KH-560, and the auxiliary additive forms a hydrogen bond network in the system;

[0060] The particle size of nano-silica is 10-30nm, and the surface hydroxyl density is ≥4 / nm 2 ;

[0061] The ultrasonic dispersion power was 250W, the frequency was 50kHz, the time was 35 minutes, and the solid content of the solution was controlled at 10-15%;

[0062] The powder material is titanium dioxide, calcium carbonate, talc or nano-silicon dioxide, and the particle size distribution PDI of the nano-powder after treatment is ≤ 0.25;

[0063] When powder materials are used as pharmaceutical fillers, the heavy metal content is ≤0.01ppm and the microbial limit is ≤100CFU / g; when used as lithium battery separators, the ionic conductivity is ≥10-3S / cm;

[0064] A dispersed anti-coagulation material for powder surface treatment and a preparation method thereof, comprising the following preparation steps:

[0065] PEG-2000 (epoxy modified) and PAAS were stirred and reacted at 80°C and pH 7.2 for 2 hours to form an amphoteric polymer complex. C18 fatty alcohol ether, trimethyl phosphate and nano-silica were added, ultrasonically dispersed for 40 minutes, and spray-dried (inlet temperature 170°C).

[0066] It is important to note that the construction and arrangement of the present application shown in a number of different exemplary embodiments are merely illustrative. Although only a few embodiments are described in detail in this disclosure, it should be readily understood by those who refer to this disclosure that many modifications are possible (e.g., the size, scale, structure, shape and proportion of various elements, as well as parameter values ​​(e.g., temperature, pressure, etc.), mounting arrangements, use of materials, color, directional changes, etc.) without departing substantially from the novel teachings and advantages of the subject matter described in this application. For example, an element shown as integrally formed may be composed of multiple parts or elements, the position of the element may be inverted or otherwise changed, and the nature or number or position of the discrete elements may be altered or changed. Therefore, all such modifications are intended to be included within the scope of the present invention. The order or sequence of any process or method steps may be changed or reordered according to alternative embodiments. In the claims, any "means plus function" clause is intended to cover the structure described herein that performs the function, and is not only structurally equivalent but also equivalent structures. Other replacements, modifications, changes, and omissions may be made in the design, operating conditions, and arrangement of the exemplary embodiments without departing from the scope of the present invention. Therefore, the invention is not limited to the specific embodiments, but extends to various modifications that still fall within the scope of the appended claims.

[0067] Additionally, in order to provide a concise description of exemplary embodiments, all features of an actual embodiment (i.e., those features that are not relevant to the best mode presently contemplated for carrying out the invention or those that are not relevant to implementing the invention) may not be described.

[0068] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the scope of protection of the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the essence and scope of the technical solutions of the present invention.

Claims

1. A dispersed anti-coagulation material for powder surface treatment and a preparation method thereof, characterized in that: The invention comprises, by weight, 100-200 parts of a polyethylene glycol (PEG) derivative, wherein the PEG derivative has a molecular weight of 200-6000 and is terminally modified with an amino group, a carboxyl group or an epoxy group; 50-150 parts of a polyacrylate (PAAS), wherein the PAAS has a molecular weight of 3000-8000; 30-80 parts of a fatty alcohol ether (FAE), wherein the FAE is a C12-C18 fatty alcohol polyoxyethylene ether with an HLB value of 8-12; 5-20 parts of an auxiliary additive, wherein the auxiliary additive is a silane coupling agent or a phosphate ester; and 10-30 parts of nano-silica, wherein the particle size is 5-50 nm and the surface is pretreated with a silane coupling agent.

2. The dispersed anti-coagulation material for powder surface treatment and the preparation method thereof according to claim 1, characterized in that: The weight ratio of the PEG derivative to PAAS is 2:1 to 4:1, and the modification degree of the terminal functional group of the PEG derivative is ≥90%.

3. The dispersed anti-coagulation material for powder surface treatment and the preparation method thereof according to claim 1, characterized in that: The silane coupling agent is KH-570 or KH-560, and the auxiliary additive forms a hydrogen bond network in the system.

4. The dispersed anti-coagulation material for powder surface treatment and the preparation method thereof according to claim 1, characterized in that: The particle size of the nano-silicon dioxide is 10-30nm, and the surface hydroxyl density is ≥4 / nm 2 .

5. The method for preparing a dispersed anticoagulant according to any one of claims 1 to 4, characterized in that: The following steps are involved: A. Precursor complexation: PEG derivatives and PAAS are reacted at 60-80°C, pH 7-8, and stirring at 300-500 rpm for 2-3 hours while nitrogen is introduced to form an amphoteric polymer complex. B. Dispersion modification: FAE and nano-silica were added, and ultrasonic dispersion was performed at a power of 200-300 W and a frequency of 40-60 kHz for 30-45 minutes, with the ultrasonic energy density controlled at 0.8-1.2 W / mL to form a homogeneous solution; C. Curing and molding: A white powder product is obtained by spray drying (the inlet temperature is increased by a gradient, initially at 150°C, maintained for 30 minutes, then increased to 180°C, and the outlet temperature is 80-90°C) or freeze drying (the material is liquid at room temperature).

6. The dispersed anti-coagulation material for powder surface treatment and the preparation method thereof according to claim 1, characterized in that: The ultrasonic dispersion was performed with a power of 250 W, a frequency of 50 kHz, and a time of 35 minutes, and the solid content of the solution was controlled at 10-15%.

7. The powder material treated with a dispersion anticoagulant according to any one of claims 1 to 4, characterized in that: S1, oil absorption value is reduced by 20-40% compared with untreated powder and ≤20ml / 100g; S2. The sedimentation rate in an aqueous system is ≤15% after 30 days, and the absolute value of the zeta potential in a 0.1 mol / L NaCl solution is ≥35 mV; S3, surface contact angle ≤ 30°, and surface energy matching coefficient γ ≤ 0.3; S4. After 100 cycles of testing within the temperature range of -40°C to 120°C, the increase in sedimentation rate is ≤5%.

8. The dispersed anti-coagulation material for powder surface treatment and the preparation method thereof according to claim 1, characterized in that: The powder material is titanium dioxide, calcium carbonate, talc or nano-scale silicon dioxide, and the particle size distribution PDI of the nano-scale powder after treatment is ≤0.

25.

9. The dispersed anti-coagulation material for powder surface treatment and the preparation method thereof according to claim 1, characterized in that: When the powder material is used as a medical filler, the heavy metal content is ≤0.01ppm and the microbial limit is ≤100CFU / g; when it is used as a lithium battery separator, the ionic conductivity is ≥10- 3 S / cm.

10. A method for preparing a dispersed anti-coagulation material for powder surface treatment, characterized in that: The method comprises the following preparation steps: A. Precursor complexation: PEG derivatives and PAAS are reacted at 60-80°C, pH 7-8, and stirring at 300-500 rpm for 2-3 hours while nitrogen is introduced to form an amphoteric polymer complex. B. Dispersion modification: FAE and nano-silica were added, and ultrasonic dispersion was performed at a power of 200-300 W and a frequency of 40-60 kHz for 30-45 minutes, with the ultrasonic energy density controlled at 0.8-1.2 W / mL to form a homogeneous solution; C. Curing and molding: A white powder product is obtained by spray drying (the inlet temperature is increased by a gradient, initially at 150°C, maintained for 30 minutes, then increased to 180°C, and the outlet temperature is 80-90°C) or freeze drying (the material is liquid at room temperature).