CN112724513A - High-strength impact-resistant thermoplastic environment-friendly plastic and preparation method thereof - Google Patents
High-strength impact-resistant thermoplastic environment-friendly plastic and preparation method thereof Download PDFInfo
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Abstract
The invention discloses a high-strength impact-resistant thermoplastic environment-friendly plastic, and particularly relates to the technical field of thermoplastic plastics, which comprises the following raw materials: thermoplastic plastics, modified carbon fibers, nano particles, a plasticizer, a coupling agent, an antioxidant and a lubricant. According to the invention, after the carbon fiber is modified by nitric acid and hydrogen peroxide, the thermoplastic plastic in a molten state enters the pores of the modified carbon fiber under high pressure in the compounding process, so that a glue nail effect is generated, an embedded structure and a reticular structure are formed, the combination between the modified carbon fiber and the thermoplastic plastic can be effectively improved, and the physical and mechanical properties of the thermoplastic plastic are effectively improved; through adding there being the nanoparticle, the nanoparticle can improve thermoplastic's intensity with modified carbon fiber interact, and the nanoparticle can be restoreed the cavity on modified carbon fiber and thermoplastic compound back surface moreover for thermoplastic's intensity and shock resistance are better.
Description
Technical Field
The invention relates to the technical field of thermoplastic plastics, in particular to high-strength impact-resistant thermoplastic environment-friendly plastic and a preparation method thereof.
Background
Thermoplastic plastics are the most widely used plastics, and are prepared from thermoplastic resin as the main component and various additives. Under a certain temperature condition, the plastic can be softened or melted into any shape, and the shape is not changed after cooling; this state can be repeated many times and has plasticity all the time, and the repetition is only a physical change, and the types of the thermoplastic plastics mainly include polyethylene, polypropylene, polyvinyl chloride, polystyrene and the like. However, the products all use non-renewable resource petroleum as raw materials, and the production process has large energy consumption and serious influence on the environment. Thermoplastic plastics can be classified into general plastics, engineering plastics, special plastics, etc. according to their performance characteristics, wide application, general versatility of molding techniques, etc. The general plastic has the main characteristics that: wide application, convenient processing and good comprehensive performance. Such as Polyethylene (PE), polyvinyl chloride (PVC), polypropylene (PP), Polystyrene (PS), acrylonitrile-butadiene-styrene (ABS) are also commonly referred to as "five-piece general purpose plastics". The engineering plastic and the special plastic are characterized in that: some structures and performances of the high polymer are particularly outstanding, or the forming processing technology is difficult, and the like, and the high polymer is often applied to professional engineering or special fields and occasions. The main engineering plastics are: nylon (Nylon), Polycarbonate (PC), Polyurethane (PU), polytetrafluoroethylene (teflon PTFE), polyethylene terephthalate (PET), etc., and special plastics such as "synthetic heart valves" of "medical polymers" and "artificial joints". According to the aggregation structure and performance characteristics of the copolymer, the copolymer can be divided into: crystalline plastics and non-crystalline plastics. Amorphous plastics are also known as amorphous plastics.
An important development in thermoplastic processing is to increase the strength and impact resistance of the thermoplastic, thereby increasing the useful life of the thermoplastic product, and to reduce the amount of thermoplastic remodeling, thereby reducing the environmental pollution of the thermoplastic during the remodeling process.
Disclosure of Invention
In order to overcome the above defects in the prior art, embodiments of the present invention provide a high-strength impact-resistant thermoplastic environment-friendly plastic and a preparation method thereof, and the problems to be solved by the present invention are: how to improve the strength and impact resistance of the thermoplastic and reduce the pollution to the environment when the thermoplastic product is remolded.
In order to achieve the purpose, the invention provides the following technical scheme: a high-strength impact-resistant thermoplastic environment-friendly plastic comprises the following raw materials in parts by weight: 40-60 parts of thermoplastic plastic, 20-40 parts of modified carbon fiber, 4-6 parts of nano particles, 1-2 parts of plasticizer, 0.2-0.6 part of coupling agent, 1-2 parts of antioxidant and 0.5-1.5 parts of lubricant.
In a preferred embodiment, the feed comprises the following raw materials in parts by weight: 45-55 parts of thermoplastic plastic, 25-35 parts of modified carbon fiber, 4.5-5.5 parts of nano particles, 1.3-1.7 parts of plasticizer, 0.3-0.5 part of coupling agent, 1.3-1.7 parts of antioxidant and 0.8-1.2 parts of lubricant.
In a preferred embodiment, the feed comprises the following raw materials in parts by weight: 50 parts of thermoplastic plastic, 30 parts of modified carbon fiber, 5 parts of nano particles, 1.5 parts of plasticizer, 0.4 part of coupling agent, 1.5 parts of antioxidant and 1 part of lubricant.
In a preferred embodiment, the nanoparticles are one or more of zinc oxide, titanium dioxide, silicon dioxide and nano silver, and the plasticizer is di-sec-octyl phthalate.
In a preferred embodiment, the thermoplastic is one of polypropylene, polyethylene, polyvinyl chloride or polystyrene, the coupling agent is a silane coupling agent, the antioxidant is 4-methyl-6-tert-butylphenol, and the lubricant is an organosilicon dispersing lubricant.
The invention also provides a preparation method of the high-strength impact-resistant thermoplastic environment-friendly plastic, which comprises the following specific preparation steps:
the method comprises the following steps: preparing modified carbon fibers, namely adding hydrogen peroxide and nitric acid into deionized water, stirring at the normal temperature at the rotating speed of 180-200r/min for 10-12min to obtain an oxidation modified solution, adding the carbon fibers into the oxidation modified solution, stirring for 2-3h under the water bath heating condition to obtain a mixed modified solution, placing the mixed modified solution into an ultrasonic dispersion machine for ultrasonic dispersion, filtering after the ultrasonic dispersion is finished, taking a filter cake to wash with the deionized water for 3-4 times, then placing the filter cake into a drying box, drying for 1-2h at the temperature of 60-80 ℃, and cooling at the normal temperature to obtain the modified carbon fibers;
step two: weighing the thermoplastic plastic, the modified carbon fiber, the nano particles, the coupling agent, the antioxidant and the lubricant in parts by weight, putting the weighed modified carbon fiber and part of the coupling agent into a high-speed stirring mixer, stirring for 6-8min in the high-speed stirring mixer, then putting the thermoplastic plastic into the mixer, using an ultrasonic oscillator to assist the mixing of the thermoplastic plastic and the modified carbon fiber, and carrying out ultrasonic oscillation treatment for 2-3 h;
step three: uniformly mixing the nano-particles soaked in the soaking solution with the rest of the coupling agent, putting the mixture into a high-speed stirring mixer, sequentially adding the antioxidant and the lubricant into the high-speed stirring mixer, and stirring for 10-15min to obtain a uniformly stirred mixed material;
step four: feeding the mixed material obtained in the third step into a double-screw extruder for extrusion, wherein the temperature of a melting zone of the double-screw extruder is 160-170 ℃ and the temperature of an extrusion zone is 180-190 ℃ during extrusion to obtain an extruded product, and cooling the extruded product in a cooling water tank with the water temperature of 45-50 ℃;
step five: and carrying out corona treatment on the cooled extruded product, and then putting the extruded product into a granulator for granulation after the corona treatment, thereby obtaining the high-strength impact-resistant thermoplastic environment-friendly plastic.
In a preferred embodiment, the heating temperature of the water bath in the first step is 42-48 ℃, the power of the ultrasonic dispersion is 400-500W, and the time of the ultrasonic dispersion is 20-30 min.
In a preferred embodiment, the coupling agent added in the second step is 2/3 in total content, the stirring speed of the high-speed stirring mixer in the second step is 500-700r/min, and the frequency of the ultrasonic oscillator is 45-50 kHz.
In a preferred embodiment, the soaking solution in the third step is a mixture of absolute ethyl alcohol and maleic anhydride polypropylene, and the content ratio of the absolute ethyl alcohol to the maleic anhydride polypropylene is 1: 4-6.
In a preferred embodiment, the high-frequency alternating voltage of the corona treatment in the step five is 4000-2The corona treatment speed is 15-20m/min, and the corona treatment time is 30-40 min.
The invention has the technical effects and advantages that:
1. according to the high-strength impact-resistant thermoplastic environment-friendly plastic prepared by adopting the raw material formula, the modified carbon fibers are added into the thermoplastic plastic, the carbon fibers are used as high-performance long fibers, so that the strength and impact resistance of the thermoplastic plastic can be effectively enhanced, the carbon fibers are modified by nitric acid and hydrogen peroxide, and the thermoplastic plastic in a molten state enters into the pores of the modified carbon fibers under high pressure in the compounding process, so that a glue nail effect is generated, an embedded structure and a net structure are formed, the combination between the modified carbon fibers and the thermoplastic plastic can be effectively improved, and the physical and mechanical properties of the thermoplastic plastic are effectively improved; the nano particles are added, so that the nano particles can interact with the modified carbon fibers to improve the strength of the thermoplastic plastic, and the nano particles can repair the cavities on the surface of the composite of the modified carbon fibers and the thermoplastic plastic, so that the strength and the impact resistance of the thermoplastic plastic are better;
2. according to the invention, the ultrasonic oscillator is used for assisting when the thermoplastic plastic and the modified carbon fiber are mixed, ultrasonic waves emitted by the ultrasonic oscillator can oscillate on the surface of the modified carbon fiber to generate a plurality of micropores, the specific surface area of the modified carbon fiber is increased, the thermoplastic plastic is easier to soak the modified carbon fiber, the contact area between the thermoplastic plastic and the modified carbon fiber is greatly increased, so that the mechanical strength of the thermoplastic plastic is greatly increased, and the compatibility of the thermoplastic plastic and the modified carbon fiber can be improved after the nanoparticles are treated by the absolute ethyl alcohol, the maleic anhydride polypropylene and the silane coupling agent, so that the strength of the thermoplastic plastic is higher.
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 high-strength impact-resistant thermoplastic environment-friendly plastic which comprises the following raw materials in parts by weight: 40 parts of thermoplastic plastic, 20 parts of modified carbon fiber, 4 parts of nano particles, 1 part of plasticizer, 0.2 part of coupling agent, 1 part of antioxidant and 0.5 part of lubricant.
In a preferred embodiment, the nanoparticles are zinc oxide and the plasticizer is di-sec-octyl phthalate.
In a preferred embodiment, the thermoplastic is one of polypropylene, polyethylene, polyvinyl chloride or polystyrene, the coupling agent is a silane coupling agent, the antioxidant is 4-methyl-6-tert-butylphenol, and the lubricant is an organosilicon dispersing lubricant.
The invention also provides a preparation method of the high-strength impact-resistant thermoplastic environment-friendly plastic, which comprises the following specific preparation steps:
the method comprises the following steps: preparing modified carbon fibers, namely adding hydrogen peroxide and nitric acid into deionized water, stirring at the normal temperature at the rotating speed of 200r/min for 12min to obtain an oxidation modified liquid, adding the carbon fibers into the oxidation modified liquid, stirring for 2.5h under the water bath heating condition to obtain a mixed modified liquid, placing the mixed modified liquid into an ultrasonic dispersion machine for ultrasonic dispersion, filtering after the ultrasonic dispersion is finished, taking a filter cake, washing the filter cake with the deionized water for 3 times, then placing the filter cake into a drying box, drying for 1.5h at the temperature of 70 ℃, and cooling at the normal temperature to obtain the modified carbon fibers;
step two: weighing the thermoplastic plastic, the modified carbon fiber, the nano particles, the coupling agent, the antioxidant and the lubricant in parts by weight, putting the weighed modified carbon fiber and part of the coupling agent into a high-speed stirring mixer, stirring for 8min in the high-speed stirring mixer, then putting the thermoplastic plastic into the mixer, using an ultrasonic oscillator to assist the mixing of the thermoplastic plastic and the modified carbon fiber, and carrying out ultrasonic oscillation treatment for 2.5 hours;
step three: uniformly mixing the nano-particles soaked in the soaking solution with the rest of the coupling agent, putting the mixture into a high-speed stirring mixer, sequentially adding the antioxidant and the lubricant into the high-speed stirring mixer, and stirring for 12min to obtain a uniformly stirred mixed material;
step four: feeding the mixed material obtained in the third step into a double-screw extruder for extrusion, wherein the temperature of a melting zone of the double-screw extruder is 165 ℃ and the temperature of an extrusion zone is 185 ℃ during extrusion to obtain an extruded product, and cooling the extruded product in a cooling water tank with the water temperature of 48 ℃;
step five: and carrying out corona treatment on the cooled extruded product, and then putting the extruded product into a granulator for granulation after the corona treatment, thereby obtaining the high-strength impact-resistant thermoplastic environment-friendly plastic.
In a preferred embodiment, the water bath heating temperature in the first step is 45 ℃, the power of the ultrasonic dispersion is 450W, and the time of the ultrasonic dispersion is 25 min.
In a preferred embodiment, the coupling agent added in the second step is 2/3 in total content, the stirring speed of the high-speed stirring mixer in the second step is 600r/min, and the frequency of the ultrasonic oscillator is 48 kHz.
In a preferred embodiment, the soaking solution in the third step is a mixture of absolute ethyl alcohol and maleic anhydride polypropylene, and the content ratio of the absolute ethyl alcohol to the maleic anhydride polypropylene is 1: 5.
In a preferred embodiment, the high-frequency alternating voltage of the corona treatment in the step five is 4500V/m2The corona treatment speed was 18m/min and the corona treatment time was 35 min.
Example 2:
different from the embodiment 1, the material comprises the following raw materials in parts by weight: 50 parts of thermoplastic plastic, 30 parts of modified carbon fiber, 5 parts of nano particles, 1.5 parts of plasticizer, 0.4 part of coupling agent, 1.5 parts of antioxidant and 1 part of lubricant.
Example 3:
different from the examples 1-2, the material comprises the following raw materials in parts by weight: 60 parts of thermoplastic plastic, 40 parts of modified carbon fiber, 6 parts of nano particles, 2 parts of plasticizer, 0.6 part of coupling agent, 2 parts of antioxidant and 1.5 parts of lubricant.
Example 4:
the invention provides a high-strength impact-resistant thermoplastic environment-friendly plastic which comprises the following raw materials in parts by weight: 40 parts of thermoplastic plastic, 20 parts of modified carbon fiber, 4 parts of nano particles, 1 part of plasticizer, 0.2 part of coupling agent, 1 part of antioxidant and 0.5 part of lubricant.
In a preferred embodiment, the nanoparticles are zinc oxide and the plasticizer is di-sec-octyl phthalate.
In a preferred embodiment, the thermoplastic is one of polypropylene, polyethylene, polyvinyl chloride or polystyrene, the coupling agent is a silane coupling agent, the antioxidant is 4-methyl-6-tert-butylphenol, and the lubricant is an organosilicon dispersing lubricant.
The invention also provides a preparation method of the high-strength impact-resistant thermoplastic environment-friendly plastic, which comprises the following specific preparation steps:
the method comprises the following steps: preparing modified carbon fibers, namely adding hydrogen peroxide and nitric acid into deionized water, stirring at the normal temperature at the rotating speed of 200r/min for 12min to obtain an oxidation modified liquid, adding the carbon fibers into the oxidation modified liquid, stirring for 2.5h under the water bath heating condition to obtain a mixed modified liquid, placing the mixed modified liquid into an ultrasonic dispersion machine for ultrasonic dispersion, filtering after the ultrasonic dispersion is finished, taking a filter cake, washing the filter cake with the deionized water for 3 times, then placing the filter cake into a drying box, drying for 1.5h at the temperature of 70 ℃, and cooling at the normal temperature to obtain the modified carbon fibers;
step two: weighing the thermoplastic plastic, the modified carbon fiber, the nano particles, the coupling agent, the antioxidant and the lubricant in parts by weight, putting the weighed modified carbon fiber and part of the coupling agent into a high-speed stirring mixer, stirring for 8min in the high-speed stirring mixer, and then putting the thermoplastic plastic into the mixer;
step three: uniformly mixing the nano-particles soaked in the soaking solution with the rest of the coupling agent, putting the mixture into a high-speed stirring mixer, sequentially adding the antioxidant and the lubricant into the high-speed stirring mixer, and stirring for 12min to obtain a uniformly stirred mixed material;
step four: feeding the mixed material obtained in the third step into a double-screw extruder for extrusion, wherein the temperature of a melting zone of the double-screw extruder is 165 ℃ and the temperature of an extrusion zone is 185 ℃ during extrusion to obtain an extruded product, and cooling the extruded product in a cooling water tank with the water temperature of 48 ℃;
step five: and carrying out corona treatment on the cooled extruded product, and then putting the extruded product into a granulator for granulation after the corona treatment, thereby obtaining the high-strength impact-resistant thermoplastic environment-friendly plastic.
In a preferred embodiment, the water bath heating temperature in the first step is 45 ℃, the power of the ultrasonic dispersion is 450W, and the time of the ultrasonic dispersion is 25 min.
In a preferred embodiment, the coupling agent added in the second step is 2/3 in total content, and the stirring speed of the high-speed stirring blender in the second step is 600 r/min.
In a preferred embodiment, the soaking solution in the third step is a mixture of absolute ethyl alcohol and maleic anhydride polypropylene, and the content ratio of the absolute ethyl alcohol to the maleic anhydride polypropylene is 1: 5.
In a preferred embodiment, the corona treated in step fiveThe high-frequency alternating-current voltage is 4500V/m2The corona treatment speed was 18m/min and the corona treatment time was 35 min.
The high-strength impact-resistant thermoplastic environment-friendly plastics prepared in the above-mentioned examples 1 to 4 were respectively used as an experimental group 1, an experimental group 2, an experimental group 3 and an experimental group 4 (polypropylene is used as the thermoplastic plastics in the examples 1, 2, 3 and 4 of the present invention), a conventional polypropylene plastic was used as a control group, tensile strength was measured according to the GB/T1039-1979 standard, bending strength was measured according to the GB/T9341-2000 standard, notched izod impact strength was measured according to the GB/T1039-1979 standard, and the measurement results are as shown in Table I:
watch 1
As shown in the table I, the high-strength impact-resistant thermoplastic environment-friendly plastic produced by the invention has higher tensile strength, bending strength and notch impact strength compared with the traditional polypropylene plastic, while the experimental group 4 is produced by adopting the raw material formula of the invention, an ultrasonic oscillator is not used for auxiliary treatment when the thermoplastic plastic and the modified carbon fiber are mixed, under the condition that the raw material formula of the example 4 is the same as that of the example 1, the tensile strength, the bending strength and the notch impact strength of the thermoplastic plastic produced by the example 4 are obviously lower than those of the thermoplastic plastic produced by the example 1, the modified carbon fiber is added into the thermoplastic plastic, the carbon fiber is used as a high-performance long fiber, the strength and the impact resistance of the thermoplastic plastic can be effectively enhanced, the carbon fiber is modified by nitric acid and hydrogen peroxide, and the thermoplastic plastic in a molten state enters the thread hole of the modified carbon fiber under high pressure in the compounding process, thereby generating a glue nail effect, forming a mosaic structure and a net structure form, and effectively improving the combination between the modified carbon fiber and the thermoplastic plastic, thereby effectively improving the physical and mechanical properties of the thermoplastic plastic; the nano particles are added, so that the nano particles can interact with the modified carbon fibers to improve the strength of the thermoplastic plastic, and the nano particles can repair the cavities on the surface of the composite of the modified carbon fibers and the thermoplastic plastic, so that the strength and the impact resistance of the thermoplastic plastic are better; through utilizing the ultrasonic oscillator to assist when thermoplastic and modified carbon fiber mix, the ultrasonic wave that the ultrasonic oscillator sent can vibrate on modified carbon fiber surface, produces numerous micropores, increases the specific surface area of modified carbon fiber, and thermoplastic soaks wherein more easily, and the area of contact of thermoplastic and modified carbon fiber strengthens greatly to greatly increased thermoplastic's mechanical strength.
Example 5:
in contrast to example 1, the nanoparticles are titanium dioxide.
Example 6:
in contrast to example 1, the nanoparticles are silica.
Example 7:
unlike example 1, the nanoparticles were nanosilver.
The high-strength impact-resistant thermoplastic environmental-friendly plastics prepared in the above examples 1, 5, 6 and 7 were respectively measured for tensile strength according to GB/T1039-1979, for bending strength according to GB/T9341-2000, and for notched Izod impact strength according to GB/T1039-1979, and the measurement results are shown in Table II:
watch two
As can be seen from the above table, the tensile strength, full strength and notched impact strength of the thermoplastics are highest when silica is used as the nanoparticle.
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 (10)
1. A high-strength impact-resistant thermoplastic environment-friendly plastic is characterized in that: the feed comprises the following raw materials in parts by weight: 40-60 parts of thermoplastic plastic, 20-40 parts of modified carbon fiber, 4-6 parts of nano particles, 1-2 parts of plasticizer, 0.2-0.6 part of coupling agent, 1-2 parts of antioxidant and 0.5-1.5 parts of lubricant.
2. The high-strength impact-resistant thermoplastic environment-friendly plastic as claimed in claim 1, wherein: the feed comprises the following raw materials in parts by weight: 45-55 parts of thermoplastic plastic, 25-35 parts of modified carbon fiber, 4.5-5.5 parts of nano particles, 1.3-1.7 parts of plasticizer, 0.3-0.5 part of coupling agent, 1.3-1.7 parts of antioxidant and 0.8-1.2 parts of lubricant.
3. The high-strength impact-resistant thermoplastic environment-friendly plastic as claimed in claim 1, wherein: the feed comprises the following raw materials in parts by weight: 50 parts of thermoplastic plastic, 30 parts of modified carbon fiber, 5 parts of nano particles, 1.5 parts of plasticizer, 0.4 part of coupling agent, 1.5 parts of antioxidant and 1 part of lubricant.
4. The high-strength impact-resistant thermoplastic environment-friendly plastic as claimed in claim 1, wherein: the nano particles are one or more of zinc oxide, titanium dioxide, silicon dioxide and nano silver, and the plasticizer is di-sec-octyl phthalate.
5. The high-strength impact-resistant thermoplastic environment-friendly plastic as claimed in claim 1, wherein: the thermoplastic plastic is one of polypropylene, polyethylene, polyvinyl chloride or polystyrene, the coupling agent is a silane coupling agent, the antioxidant is 4-methyl-6-tert-butylphenol, and the lubricant is an organic silicon dispersing lubricant.
6. The method for preparing the high-strength impact-resistant thermoplastic environment-friendly plastic according to any one of claims 1 to 5, characterized in that: the preparation method comprises the following specific steps:
the method comprises the following steps: preparing modified carbon fibers, namely adding hydrogen peroxide and nitric acid into deionized water, stirring at the normal temperature at the rotating speed of 180-200r/min for 10-12min to obtain an oxidation modified solution, adding the carbon fibers into the oxidation modified solution, stirring for 2-3h under the water bath heating condition to obtain a mixed modified solution, placing the mixed modified solution into an ultrasonic dispersion machine for ultrasonic dispersion, filtering after the ultrasonic dispersion is finished, taking a filter cake to wash with the deionized water for 3-4 times, then placing the filter cake into a drying box, drying for 1-2h at the temperature of 60-80 ℃, and cooling at the normal temperature to obtain the modified carbon fibers;
step two: weighing the thermoplastic plastic, the modified carbon fiber, the nano particles, the coupling agent, the antioxidant and the lubricant in parts by weight, putting the weighed modified carbon fiber and part of the coupling agent into a high-speed stirring mixer, stirring for 6-8min in the high-speed stirring mixer, then putting the thermoplastic plastic into the mixer, using an ultrasonic oscillator to assist the mixing of the thermoplastic plastic and the modified carbon fiber, and carrying out ultrasonic oscillation treatment for 2-3 h;
step three: uniformly mixing the nano-particles soaked in the soaking solution with the rest of the coupling agent, putting the mixture into a high-speed stirring mixer, sequentially adding the antioxidant and the lubricant into the high-speed stirring mixer, and stirring for 10-15min to obtain a uniformly stirred mixed material;
step four: feeding the mixed material obtained in the third step into a double-screw extruder for extrusion, wherein the temperature of a melting zone of the double-screw extruder is 160-170 ℃ and the temperature of an extrusion zone is 180-190 ℃ during extrusion to obtain an extruded product, and cooling the extruded product in a cooling water tank with the water temperature of 45-50 ℃;
step five: and carrying out corona treatment on the cooled extruded product, and then putting the extruded product into a granulator for granulation after the corona treatment, thereby obtaining the high-strength impact-resistant thermoplastic environment-friendly plastic.
7. The method for preparing the high-strength impact-resistant thermoplastic environment-friendly plastic according to claim 6, characterized in that: the heating temperature of the water bath in the first step is 42-48 ℃, the power of the ultrasonic dispersion is 400-500W, and the time of the ultrasonic dispersion is 20-30 min.
8. The method for preparing the high-strength impact-resistant thermoplastic environment-friendly plastic according to claim 6, characterized in that: the coupling agent added in the second step is 2/3 of the total content, the stirring speed of the high-speed stirring mixer in the second step is 500-700r/min, and the frequency of the ultrasonic oscillator is 45-50 kHz.
9. The method for preparing the high-strength impact-resistant thermoplastic environment-friendly plastic according to claim 6, characterized in that: the soaking solution in the third step is a mixture of absolute ethyl alcohol and maleic anhydride polypropylene, and the content ratio of the absolute ethyl alcohol to the maleic anhydride polypropylene is 1: 4-6.
10. The method for preparing the high-strength impact-resistant thermoplastic environment-friendly plastic according to claim 6, characterized in that: the high-frequency alternating voltage of the corona treatment in the step five is 4000-5000V/m2, the corona treatment speed is 15-20m/min, and the corona treatment time is 30-40 min.
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