CN113549343B - Modified nano zinc oxide compound for plastics and preparation method thereof - Google Patents
Modified nano zinc oxide compound for plastics and preparation method thereof Download PDFInfo
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Abstract
The invention discloses a modified nano zinc oxide compound for plastics, and particularly relates to the technical field of plastic processing, wherein the compound comprises the following raw materials: the active nano zinc oxide, a modifier and modified silicon dioxide, wherein the modifier comprises quaternary ammonium salt solution, betaine, sodium tripolyphosphate and silver nitrate. According to the invention, the nano zinc oxide is modified by adopting the modifier and the modified silicon dioxide, the antibacterial property of the nano zinc oxide compound can be effectively improved by the mixing reaction of the quaternary ammonium salt and the nano zinc oxide dispersion liquid, and the betaine, the sodium tripolyphosphate and the nano zinc oxide have good dispersibility, good stability and good compatibility with organic matters after the reaction, and the light resistance and the weather resistance of the zinc oxide can be improved, so that the modified nano zinc oxide can be better filled into plastics, the anti-aging property and the antibacterial effect of the plastics are better, and the silver nitrate can be loaded on the nano zinc oxide, so that the antibacterial property of the nano zinc oxide can be effectively improved.
Description
Technical Field
The invention relates to the technical field of plastic processing, in particular to a modified nano zinc oxide compound for plastics and a preparation method thereof.
Background
The plastic is a plastic (flexible) material formed by processing and molding or a rigid material formed by curing and crosslinking by using a high molecular weight synthetic resin as a main component and adding appropriate additives such as a plasticizer, a stabilizer, an antioxidant, a flame retardant, a colorant and the like. Many plastic materials have very limited applications because they either do not have the desired physical properties or have very poor processability, and processing aids are used to enhance the melt processability of the plastic, increase production, reduce down time and provide better product quality. Plastic products are generally produced by adding a small amount of additives to synthetic resins and then subjecting the resulting mixture to appropriate shaping processes. The function of the auxiliary agent can be generally seen from the name, and is not only to improve the processing performance, improve the service performance, prolong the service life and reduce the product cost. The assistant is used in small amount but has no small effect. And the nano zinc oxide as the plastic addition auxiliary agent can improve the ageing resistance and the antibacterial property of the plastic.
The nano zinc oxide is a novel high-function fine inorganic product. Due to the nanocrystallization of the material, the nano zinc oxide generates a surface effect, a small-size effect, a macroscopic quantum tunneling effect and the like which are not possessed by the bulk material of the nano zinc oxide. Therefore, the nano zinc oxide has special performance and application which cannot be compared with common zinc oxide products in the aspects of magnetism, light, electricity, chemistry, physics, sensibility and the like. However, the nano zinc oxide with higher specific surface energy is easy to agglomerate, difficult to disperse in an organic medium and poor in binding property with a polymer, and directly influences the actual efficacy of the nano zinc oxide. In order to reduce the surface polarity of the nano material, improve the dispersing ability and affinity of the nano particles in an organic medium, expand the application range of the nano material and have great significance for surface modification of nano ZnO.
Disclosure of Invention
In order to overcome the above defects in the prior art, embodiments of the present invention provide a modified nano zinc oxide compound for plastics and a preparation method thereof, and the problems to be solved by the present invention are: how to improve the flame retardant property of the additive to the plastic and meet the flame retardant requirement of people.
In order to achieve the purpose, the invention provides the following technical scheme: a modified nano zinc oxide compound for plastics comprises the following raw materials in parts by weight: 50-60 parts of active nano zinc oxide, 30-40 parts of modifier and 8-16 parts of modified silicon dioxide, wherein the modifier comprises 50-60% of quaternary ammonium salt solution, 10-15% of betaine, 10-15% of sodium tripolyphosphate and 15-25% of silver nitrate.
In a preferred embodiment, the feed comprises the following raw materials in parts by weight: 53-57 parts of active nano zinc oxide, 33-37 parts of modifier and 10-14 parts of modified silicon dioxide, wherein the modifier comprises 50-60% of quaternary ammonium salt solution, 10-15% of betaine, 10-15% of sodium tripolyphosphate and 15-25% of silver nitrate.
In a preferred embodiment, the feed comprises the following raw materials in parts by weight: 55 parts of active nano zinc oxide, 35 parts of a modifier and 12 parts of modified silicon dioxide, wherein the modifier comprises 55% of quaternary ammonium salt solution, 12% of betaine, 13% of sodium tripolyphosphate and 20% of silver nitrate.
In a preferred embodiment, the particle size of the active nano zinc oxide is 80-200nm, and the particle size of the modified silica is 150-250 nm.
The invention also provides a preparation method of the modified nano zinc oxide compound for plastics, which comprises the following specific preparation steps:
the method comprises the following steps: preparing active nano zinc oxide, weighing nano zinc oxide particles, adding the nano zinc oxide particles into a reaction container, adding ethanol, water and a coupling agent into the reaction container, uniformly mixing, performing ultrasonic dispersion at 35-45 ℃ to obtain a dispersion liquid, and performing reflux reaction on the dispersion liquid for 10-20 hours to obtain the active nano zinc oxide for later use;
step two: weighing the active nano zinc oxide obtained in the step one according to the weight parts, adding a sodium dodecyl sulfate dispersing agent and water into the active nano zinc oxide, ultrasonically stirring and dispersing to obtain a dispersion liquid A, adding a quaternary ammonium salt solution into the dispersion liquid A, stirring and mixing uniformly, then adding betaine and sodium tripolyphosphate, continuing stirring uniformly, adding silver nitrate, and stirring and mixing uniformly to obtain a dispersion liquid B for later use;
step three: preparing modified silicon dioxide, namely weighing nano silicon dioxide, adding the nano silicon dioxide into a silane coupling agent, stirring and reacting at room temperature for 20-40min, adding talcum powder dispersion after the reaction is finished to prepare slurry, then stirring and grinding for 2-3h by a wet method, drying and sieving to obtain the modified silicon dioxide for later use;
step four: adding the modified silicon dioxide obtained in the third step into the dispersion liquid B obtained in the second step, then heating, stirring and ultrasonically dispersing to obtain a dispersion liquid C, carrying out hydrothermal reaction on the dispersion liquid, and obtaining a modified nano zinc oxide compound solution after the hydrothermal reaction is finished;
step five: and D, filtering, drying, crushing and sieving the modified nano zinc oxide compound solution obtained in the fourth step to obtain the modified nano zinc oxide compound for plastics.
In a preferred embodiment, the coupling agent in the first step is a silane coupling agent, the frequency of ultrasonic dispersion in the first step is 70-80Hz, and the time of ultrasonic dispersion is 30-50 min.
In a preferred embodiment, the frequency of the ultrasonic generator during the ultrasonic stirring in the second step is 50-60Hz, the stirring rate is 1500-1800 rpm, the stirring rate during the adding of the quaternary ammonium salt solution, the betaine, the sodium tripolyphosphate and the silver nitrate in the second step is 600-1000 rpm, and the frequency of the ultrasonic generator is 50-60 Hz.
In a preferred embodiment, the silane coupling agent in step three is a silane coupling agent containing a mercapto group, the talc powder dispersion is prepared by adding sodium lignosulfonate and talc powder into a solvent, adding polyethylene glycol, raising the temperature to 60-70 ℃, stripping the talc powder into talc nanosheets with the aid of an ultrasonic cleaning machine, and reacting the sodium lignosulfonate with the talc powder to obtain the talc powder dispersion.
In a preferred embodiment, the temperature during the heating and stirring in the fourth step is 60-70 ℃, the stirring speed is 800-1200 rpm, the hydrothermal reaction temperature is 80-100 ℃, and the reaction time is 18-24 h.
In a preferred embodiment, the drying temperature in the fifth step is 80-100 ℃ until the water content of the modified nano zinc oxide compound is 8-12%.
The invention has the technical effects and advantages that:
1. the modified nano zinc oxide compound for plastics prepared by the raw material formula is modified by a modifier and modified silicon dioxide, wherein the modifier comprises quaternary ammonium salt solution, betaine, sodium tripolyphosphate and silver nitrate, the antibacterial property of the nano zinc oxide compound can be effectively improved by mixing and reacting quaternary ammonium salt and nano zinc oxide dispersion, and the modified nano zinc oxide compound has good dispersity, good stability and good compatibility with organic matters after the betaine and the sodium tripolyphosphate react with the nano zinc oxide, can improve the light resistance and weather resistance of the zinc oxide, can be better filled into plastics, has better aging resistance and antibacterial effect, and can effectively improve the antibacterial property of the nano zinc oxide by loading the silver nitrate on the nano zinc oxide;
2. according to the invention, the nano zinc oxide is modified by using the silane coupling agent, and then is treated by using the modifying agent and the modified silicon dioxide, so that the modifying effect of the modifying agent and the modified silicon dioxide on the nano zinc oxide is better, the dispersed and aggregated nano particles are broken by using physical stirring and an ultrasonic method in the modification process, and the ultrasonic energy generates cavitation, so that the liquid is in a high-frequency oscillation state; the nano zinc oxide particles can be in a good dispersion state by utilizing the action of ultrasonic waves, the agglomeration phenomenon among the nano zinc oxide particles is reduced, and the modification effect on the nano zinc oxide is better.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1:
the invention provides a modified nano zinc oxide compound for plastics, which comprises the following raw materials in parts by weight: 50 parts of active nano zinc oxide, 30 parts of modifier and 8 parts of modified silicon dioxide, wherein the modifier comprises 55% of quaternary ammonium salt solution, 12% of betaine, 13% of sodium tripolyphosphate and 20% of silver nitrate.
In a preferred embodiment, the particle size of the active nano zinc oxide is 140nm, and the particle size of the modified silica is 200 nm.
The invention also provides a preparation method of the modified nano zinc oxide compound for plastics, which comprises the following specific preparation steps:
the method comprises the following steps: preparing active nano zinc oxide, weighing nano zinc oxide particles, adding the nano zinc oxide particles into a reaction container, adding ethanol, water and a coupling agent into the reaction container, uniformly mixing, performing ultrasonic dispersion at 40 ℃ to obtain a dispersion liquid, and performing reflux reaction on the dispersion liquid for 15 hours to obtain the active nano zinc oxide for later use;
step two: weighing the active nano zinc oxide obtained in the step one according to the weight parts, adding a sodium dodecyl sulfate dispersing agent and water into the active nano zinc oxide, ultrasonically stirring and dispersing to obtain a dispersion liquid A, adding a quaternary ammonium salt solution into the dispersion liquid A, stirring and mixing uniformly, then adding betaine and sodium tripolyphosphate, continuing stirring uniformly, adding silver nitrate, and stirring and mixing uniformly to obtain a dispersion liquid B for later use;
step three: preparing modified silicon dioxide, namely weighing nano silicon dioxide, adding the nano silicon dioxide into a silane coupling agent, stirring and reacting at room temperature for 30min, adding talcum powder dispersion after the reaction is finished, preparing slurry, stirring and grinding for 2.5h by a wet method, drying and sieving to obtain the modified silicon dioxide for later use;
step four: adding the modified silicon dioxide obtained in the third step into the dispersion liquid B obtained in the second step, then heating, stirring and ultrasonically dispersing to obtain a dispersion liquid C, carrying out hydrothermal reaction on the dispersion liquid, and obtaining a modified nano zinc oxide compound solution after the hydrothermal reaction is finished;
step five: and D, filtering, drying, crushing and sieving the modified nano zinc oxide compound solution obtained in the fourth step to obtain the modified nano zinc oxide compound for plastics.
In a preferred embodiment, the coupling agent in the first step is a silane coupling agent, the frequency of ultrasonic dispersion in the first step is 75Hz, and the time of ultrasonic dispersion is 40 min.
In a preferred embodiment, the frequency of the ultrasonic generator during ultrasonic stirring in the second step is 55Hz, the stirring rate is 1600 rpm, the stirring rate during adding the quaternary ammonium salt solution, the betaine, the sodium tripolyphosphate and the silver nitrate in the second step is 800 rpm, and the frequency of the ultrasonic generator is 50-60 Hz.
In a preferred embodiment, the silane coupling agent in step three is a silane coupling agent containing a mercapto group, the talc powder dispersion is prepared by adding sodium lignosulfonate and talc powder into a solvent, adding polyethylene glycol, raising the temperature to 65 ℃, stripping the talc powder into talc nanosheets with the aid of an ultrasonic cleaning machine, and reacting the sodium lignosulfonate with the talc powder to obtain the talc powder dispersion.
In a preferred embodiment, the temperature of the heating and stirring in the fourth step is 65 ℃, the stirring rate is 1000 rpm, the hydrothermal reaction temperature is 90 ℃, and the reaction time is 21 h.
In a preferred embodiment, the drying temperature in the fifth step is 90 ℃ and the modified nano zinc oxide composite is dried until the water content is 10%.
Example 2:
the invention provides a modified nano zinc oxide compound for plastics, which comprises the following raw materials in parts by weight: 55 parts of active nano zinc oxide, 35 parts of a modifier and 12 parts of modified silicon dioxide, wherein the modifier comprises 55% of quaternary ammonium salt solution, 12% of betaine, 13% of sodium tripolyphosphate and 20% of silver nitrate.
Example 3:
the invention provides a modified nano zinc oxide compound for plastics, which comprises the following raw materials in parts by weight: 60 parts of active nano zinc oxide, 40 parts of modifier and 16 parts of modified silicon dioxide, wherein the modifier comprises 55% of quaternary ammonium salt solution, 12% of betaine, 13% of sodium tripolyphosphate and 20% of silver nitrate.
Example 4:
the invention provides a modified nano zinc oxide compound for plastics, which comprises the following raw materials in parts by weight: 50 parts of active nano zinc oxide, 30 parts of modifier and 8 parts of modified silicon dioxide, wherein the modifier comprises 50% of quaternary ammonium salt solution, 15% of betaine, 15% of sodium tripolyphosphate and 20% of silver nitrate.
In a preferred embodiment, the particle size of the active nano zinc oxide is 140nm, and the particle size of the modified silica is 200 nm.
The invention also provides a preparation method of the modified nano zinc oxide compound for plastics, which comprises the following specific preparation steps:
the method comprises the following steps: preparing active nano zinc oxide, weighing nano zinc oxide particles, adding the nano zinc oxide particles into a reaction container, adding ethanol, water and a coupling agent into the reaction container, uniformly mixing, performing ultrasonic dispersion at 40 ℃ to obtain a dispersion liquid, and performing reflux reaction on the dispersion liquid for 15 hours to obtain the active nano zinc oxide for later use;
step two: weighing the active nano zinc oxide obtained in the step one according to the weight parts, adding a sodium dodecyl sulfate dispersing agent and water into the active nano zinc oxide, ultrasonically stirring and dispersing to obtain a dispersion liquid A, adding a quaternary ammonium salt solution into the dispersion liquid A, stirring and mixing uniformly, then adding betaine and sodium tripolyphosphate, continuing stirring uniformly, adding silver nitrate, and stirring and mixing uniformly to obtain a dispersion liquid B for later use;
step three: preparing modified silicon dioxide, namely weighing nano silicon dioxide, adding the nano silicon dioxide into a silane coupling agent, stirring and reacting for 30min at room temperature, adding talcum powder dispersion liquid after the reaction is finished, preparing slurry, stirring and grinding for 2.5h by a wet method, drying and sieving to obtain the modified silicon dioxide for later use;
step four: adding the modified silicon dioxide obtained in the third step into the dispersion liquid B obtained in the second step, then heating, stirring and ultrasonically dispersing to obtain a dispersion liquid C, carrying out hydrothermal reaction on the dispersion liquid, and obtaining a modified nano zinc oxide compound solution after the hydrothermal reaction is finished;
step five: and D, filtering, drying, crushing and sieving the modified nano zinc oxide compound solution obtained in the fourth step to obtain the modified nano zinc oxide compound for plastics.
In a preferred embodiment, the coupling agent in the first step is a silane coupling agent, the frequency of ultrasonic dispersion in the first step is 75Hz, and the time of ultrasonic dispersion is 40 min.
In a preferred embodiment, the frequency of the ultrasonic generator during ultrasonic stirring in the second step is 55Hz, the stirring rate is 1600 rpm, the stirring rate during adding the quaternary ammonium salt solution, the betaine, the sodium tripolyphosphate and the silver nitrate in the second step is 800 rpm, and the frequency of the ultrasonic generator is 50-60 Hz.
In a preferred embodiment, the silane coupling agent in step three is a silane coupling agent containing a mercapto group, the talc powder dispersion is prepared by adding sodium lignosulfonate and talc powder into a solvent, adding polyethylene glycol, raising the temperature to 65 ℃, stripping the talc powder into talc nanosheets with the aid of an ultrasonic cleaning machine, and reacting the sodium lignosulfonate with the talc powder to obtain the talc powder dispersion.
In a preferred embodiment, the temperature of the heating and stirring in the fourth step is 65 ℃, the stirring speed is 1000 rpm, the hydrothermal reaction temperature is 90 ℃, and the reaction time is 21 h.
In a preferred embodiment, the drying temperature in the fifth step is 90 ℃ and the modified nano zinc oxide composite is dried until the water content is 10%.
Example 5:
the invention provides a modified nano zinc oxide compound for plastics, which comprises the following raw materials in parts by weight: 50 parts of active nano zinc oxide, 30 parts of modifier and 8 parts of modified silicon dioxide, wherein the modifier comprises 60% of quaternary ammonium salt solution, 13% of betaine, 12% of sodium tripolyphosphate and 15% of silver nitrate.
In a preferred embodiment, the particle size of the active nano zinc oxide is 140nm, and the particle size of the modified silica is 200 nm.
The invention also provides a preparation method of the modified nano zinc oxide compound for plastics, which comprises the following specific preparation steps:
the method comprises the following steps: preparing active nano zinc oxide, weighing nano zinc oxide particles, adding the nano zinc oxide particles into a reaction container, adding ethanol, water and a coupling agent into the reaction container, uniformly mixing, performing ultrasonic dispersion at 40 ℃ to obtain a dispersion liquid, and performing reflux reaction on the dispersion liquid for 15 hours to obtain the active nano zinc oxide for later use;
step two: weighing the active nano zinc oxide obtained in the step one according to the weight parts, adding a sodium dodecyl sulfate dispersing agent and water into the active nano zinc oxide, ultrasonically stirring and dispersing to obtain a dispersion liquid A, adding a quaternary ammonium salt solution into the dispersion liquid A, stirring and mixing uniformly, then adding betaine and sodium tripolyphosphate, continuing stirring uniformly, adding silver nitrate, and stirring and mixing uniformly to obtain a dispersion liquid B for later use;
step three: preparing modified silicon dioxide, namely weighing nano silicon dioxide, adding the nano silicon dioxide into a silane coupling agent, stirring and reacting for 30min at room temperature, adding talcum powder dispersion liquid after the reaction is finished, preparing slurry, stirring and grinding for 2.5h by a wet method, drying and sieving to obtain the modified silicon dioxide for later use;
step four: adding the modified silicon dioxide obtained in the third step into the dispersion liquid B obtained in the second step, then heating, stirring and ultrasonically dispersing to obtain a dispersion liquid C, carrying out hydrothermal reaction on the dispersion liquid, and obtaining a modified nano zinc oxide compound solution after the hydrothermal reaction is finished;
step five: and D, filtering, drying, crushing and sieving the modified nano zinc oxide compound solution obtained in the fourth step to obtain the modified nano zinc oxide compound for plastics.
In a preferred embodiment, the coupling agent in the first step is a silane coupling agent, the frequency of ultrasonic dispersion in the first step is 75Hz, and the time of ultrasonic dispersion is 40 min.
In a preferred embodiment, the frequency of the ultrasonic generator is 55Hz and the stirring rate is 1600 rpm when the ultrasonic stirring is performed in the second step, the stirring rate is 800 rpm when the quaternary ammonium salt solution, the betaine, the sodium tripolyphosphate and the silver nitrate are added in the second step, and the frequency of the ultrasonic generator is 50-60 Hz.
In a preferred embodiment, the silane coupling agent in step three is a silane coupling agent containing a mercapto group, the talc powder dispersion is prepared by adding sodium lignosulfonate and talc powder into a solvent, adding polyethylene glycol, raising the temperature to 65 ℃, stripping the talc powder into talc nanosheets with the aid of an ultrasonic cleaning machine, and reacting the sodium lignosulfonate with the talc powder to obtain the talc powder dispersion.
In a preferred embodiment, the temperature of the heating and stirring in the fourth step is 65 ℃, the stirring rate is 1000 rpm, the hydrothermal reaction temperature is 90 ℃, and the reaction time is 21 h.
In a preferred embodiment, the drying temperature in the fifth step is 90 ℃ and the modified nano zinc oxide composite is dried until the water content is 10%.
The modified nano zinc oxide compounds for plastics prepared in the above examples 1 to 5 were respectively used as an experimental group 1, an experimental group 2, an experimental group 3, an experimental group 4, and an experimental group 5, PVC plastics containing nano zinc oxide commercially available was used as a control group, the selected modified nano zinc oxide compounds were used to process and produce the PVC plastics, and then the produced plastics were tested for tensile strength, bending strength, antibacterial property, and anti-aging property. The test results are shown in table one:
watch 1
As can be seen from table one, compared with the plastic produced by using nano zinc oxide in the prior art, the plastic produced by using the modified nano zinc oxide compound of the invention has higher tensile strength, yield strength and anti-aging performance, so that the service life of the plastic is longer, and the plastic has better antibacterial effects on escherichia coli, staphylococcus aureus and candida albicans, and the examples 4 and 5 adopt modifiers with different components, so that compared with the example 1, the tensile strength and the yield strength are not obviously changed, and the anti-aging performance and the antibacterial performance are changed; the nanometer zinc oxide is modified by adopting a modifier and modified silicon dioxide, the modifier comprises quaternary ammonium salt solution, betaine, sodium tripolyphosphate and silver nitrate, the antibacterial performance of the nanometer zinc oxide compound can be effectively improved by mixing and reacting quaternary ammonium salt with nanometer zinc oxide dispersion, the betaine, the sodium tripolyphosphate and the nanometer zinc oxide have good dispersibility, good stability and good compatibility with organic matters after reaction, the light resistance and the weather resistance of the zinc oxide can also be improved, the modified nanometer zinc oxide can be better filled into plastics, the anti-aging performance and the antibacterial effect of the plastics are better, the silver nitrate can be loaded on the nanometer zinc oxide, and the antibacterial performance of the nanometer zinc oxide can be effectively improved.
And finally: the above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that are within the spirit and principle of the present invention are intended to be included in the scope of the present invention.
Claims (9)
1. A preparation method of a modified nano zinc oxide compound for plastics is characterized by comprising the following steps: the feed comprises the following raw materials in parts by weight: 50-60 parts of active nano zinc oxide, 30-40 parts of modifier and 8-16 parts of modified silicon dioxide, wherein the modifier comprises 50-60% of quaternary ammonium salt solution, 10-15% of betaine, 10-15% of sodium tripolyphosphate and 15-25% of silver nitrate;
a preparation method of a modified nano zinc oxide compound for plastics comprises the following specific preparation steps:
the method comprises the following steps: preparing active nano zinc oxide, weighing nano zinc oxide particles, adding the nano zinc oxide particles into a reaction container, adding ethanol, water and a coupling agent into the reaction container, uniformly mixing, performing ultrasonic dispersion at 35-45 ℃ to obtain a dispersion liquid, and performing reflux reaction on the dispersion liquid for 10-20 hours to obtain the active nano zinc oxide for later use;
step two: weighing the active nano zinc oxide obtained in the step one according to the weight parts, adding a sodium dodecyl sulfate dispersing agent and water into the active nano zinc oxide, ultrasonically stirring and dispersing to obtain a dispersion liquid A, adding a quaternary ammonium salt solution into the dispersion liquid A, stirring and mixing uniformly, then adding betaine and sodium tripolyphosphate, continuing stirring uniformly, adding silver nitrate, and stirring and mixing uniformly to obtain a dispersion liquid B for later use;
step three: preparing modified silicon dioxide, namely weighing nano silicon dioxide, adding the nano silicon dioxide into a silane coupling agent, stirring and reacting at room temperature for 20-40min, adding talcum powder dispersion liquid after the reaction is finished to prepare slurry, then stirring and grinding for 2-3h by a wet method, drying and sieving to obtain the modified silicon dioxide for later use;
step four: adding the modified silicon dioxide obtained in the third step into the dispersion liquid B obtained in the second step, then heating, stirring and ultrasonically dispersing to obtain a dispersion liquid C, carrying out hydrothermal reaction on the dispersion liquid, and obtaining a modified nano zinc oxide compound solution after the hydrothermal reaction is finished;
step five: and filtering, drying, crushing and sieving the modified nano zinc oxide compound solution obtained in the fourth step to obtain the modified nano zinc oxide compound for plastics.
2. The method for preparing the modified nano zinc oxide compound for plastics according to claim 1, which is characterized in that: the feed comprises the following raw materials in parts by weight: 53-57 parts of active nano zinc oxide, 33-37 parts of modifier and 10-14 parts of modified silicon dioxide, wherein the modifier comprises 50-60% of quaternary ammonium salt solution, 10-15% of betaine, 10-15% of sodium tripolyphosphate and 15-25% of silver nitrate.
3. The preparation method of the modified nano zinc oxide compound for plastics according to claim 1, wherein the preparation method comprises the following steps: the feed comprises the following raw materials in parts by weight: 55 parts of active nano zinc oxide, 35 parts of a modifier and 12 parts of modified silicon dioxide, wherein the modifier comprises 55% of quaternary ammonium salt solution, 12% of betaine, 13% of sodium tripolyphosphate and 20% of silver nitrate.
4. The preparation method of the modified nano zinc oxide compound for plastics according to claim 1, wherein the preparation method comprises the following steps: the particle size of the active nano zinc oxide is 80-200nm, and the particle size of the modified silicon dioxide is 150-250 nm.
5. The preparation method of the modified nano zinc oxide compound for plastics according to claim 1, wherein the preparation method comprises the following steps: the coupling agent in the first step is a silane coupling agent, the ultrasonic dispersion frequency in the first step is 70-80Hz, and the ultrasonic dispersion time is 30-50 min.
6. The preparation method of the modified nano zinc oxide compound for plastics according to claim 1, wherein the preparation method comprises the following steps: the frequency of the ultrasonic generator is 50-60Hz during ultrasonic stirring in the second step, the stirring speed is 1500-1800 rpm, the stirring speed is 600-1000 rpm when quaternary ammonium salt solution, betaine, sodium tripolyphosphate and silver nitrate are added in the second step, and the frequency of the ultrasonic generator is 50-60 Hz.
7. The preparation method of the modified nano zinc oxide compound for plastics according to claim 1, wherein the preparation method comprises the following steps: and in the third step, the silane coupling agent adopts a silane coupling agent containing sulfydryl, sodium lignosulfonate and talcum powder are added into a solvent during preparation of the talcum powder dispersion liquid, then polyethylene glycol is added, the temperature is raised to 60-70 ℃, the talcum powder is peeled into talcum powder nanosheets with the aid of an ultrasonic cleaning machine, and the sodium lignosulfonate reacts with the talcum powder to obtain the talcum powder dispersion liquid.
8. The method for preparing the modified nano zinc oxide compound for plastics according to claim 1, which is characterized in that: and the temperature of the step four is 60-70 ℃ during heating and stirring, the stirring speed is 800-1200 r/min, the hydrothermal reaction temperature is 80-100 ℃, and the reaction time is 18-24 h.
9. The preparation method of the modified nano zinc oxide compound for plastics according to claim 1, wherein the preparation method comprises the following steps: and in the fifth step, drying is carried out at the drying temperature of 80-100 ℃ until the water content of the modified nano zinc oxide compound is 8-12%.
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| CN114868768A (en) * | 2022-04-25 | 2022-08-09 | 深圳大学 | Composite antibacterial material, preparation method and application |
| CN117210031B (en) * | 2023-09-09 | 2024-03-19 | 东莞世皓新材料生物科技有限公司 | Modified nano zinc oxide powder and preparation method and application thereof |
| CN117264282B (en) * | 2023-10-08 | 2024-02-20 | 科迈特新材料有限公司 | Nanometer zinc oxide toughening additive for plastics and preparation method thereof |
| US12022825B1 (en) * | 2023-10-26 | 2024-07-02 | Hongye Gao | Preparation method for modified nano-zinc oxide powder |
| CN117801364A (en) * | 2024-01-02 | 2024-04-02 | 科迈特新材料有限公司 | Anti-aging flame retardant for rubber and preparation method thereof |
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