CN114634697B

CN114634697B - Modified polycarbonate material, preparation method and application thereof

Info

Publication number: CN114634697B
Application number: CN202210417915.7A
Authority: CN
Inventors: 张德权; 邵景昌; 颜端学; 葛雷雷
Original assignee: Ningbo Gongniu Precision Manufacturing Co Ltd
Current assignee: Ningbo Gongniu Precision Manufacturing Co Ltd
Priority date: 2022-04-20
Filing date: 2022-04-20
Publication date: 2023-09-26
Anticipated expiration: 2042-04-20
Also published as: CN114634697A

Abstract

The application discloses a modified polycarbonate material, a preparation method and application thereof, and relates to the field of materials. The preparation method of the modified polycarbonate material uses raw materials comprising metal powder, a surface modifier and a micro cross-linking agent. The surface modifier can form a compact organic layer on the surface of the metal powder, and meanwhile, the micro cross-linking agent and the polycarbonate generate transesterification reaction to enable the metal powder and the polycarbonate to form chemical cross-linking at a two-phase interface, so that the compatibility of the metal powder and the polycarbonate is improved, and the dispersibility of the metal powder in the polycarbonate is better and the binding force is better. The modified polycarbonate material obtained by final granulation has high specific gravity and better material performance. In addition, the modified polycarbonate material prepared by the preparation method has high gloss and high flame retardance, and can be applied to the preparation of electrical equipment shells. When the anti-theft electric appliance is applied to an electric appliance shell, the electric appliance product is more attractive and has better safety.

Description

Modified polycarbonate material, preparation method and application thereof

Technical Field

The application relates to the technical field of materials, in particular to a modified polycarbonate material, a preparation method and application thereof.

Background

Polycarbonates (PCs) are widely used in the fields of automobiles, aerospace, home appliances, medical care, etc., because of their excellent properties such as impact resistance, light transmittance, weather resistance, heat resistance, etc. In order to meet the use requirements in some scenes, the polycarbonate needs to be modified to have a higher specific gravity. In some prior art, a high specific gravity dopant is added to the polycarbonate to increase the overall specific gravity of the modified polycarbonate material. However, it is difficult to achieve a compromise in the material properties of the composite, such as impact resistance.

Disclosure of Invention

The application aims to provide a modified polycarbonate material, a preparation method and application thereof, wherein the modified polycarbonate material or the modified polycarbonate material prepared by the preparation method can achieve both high specific gravity and better material performance.

The application is realized in the following way:

in a first aspect, an embodiment of the present application provides a method for preparing a modified polycarbonate material, including:

mixing raw materials comprising 10-40 parts by weight of metal powder, 5-10 parts by weight of surface modifier, 30-60 parts by weight of polycarbonate and 10-20 parts by weight of micro-crosslinking agent to obtain a granulation mixture;

the pelletization mixture is pelletized to obtain the modified polycarbonate material.

In an alternative embodiment, the step of mixing a feedstock comprising 10 to 40 parts of metal powder, 5 to 10 parts of a surface modifier, 30 to 60 parts of polycarbonate, and 10 to 20 parts of a micro-crosslinking agent to obtain a pelletised mixture comprises:

mixing 10-40 parts of metal powder with 5-10 parts of surface modifier to obtain a first raw material;

the first raw material is mixed with a second raw material to obtain a pelletization mixture, wherein the second raw material comprises 30-60 parts of polycarbonate and 10-20 parts of micro-crosslinking agent.

In an alternative embodiment, the step of mixing 10 to 40 parts of the metal powder with 5 to 10 parts of the surface modifier to obtain the first feedstock comprises:

diluting the surface modifier with ethanol, mixing with the metal powder, and uniformly stirring at the temperature of 25-50 ℃ to obtain a first raw material.

In an alternative embodiment, the particle size of the metal powder is 30 to 100nm.

In an alternative embodiment, the metal powder is copper powder.

In an alternative embodiment, the surface modifier is one or a mixture of more than two of silane coupling agent, titanate coupling agent, polyvinyl alcohol, sodium dodecyl sulfate, sodium stearate, sodium dodecyl benzene sulfonate and imidazoline surfactant.

In an alternative embodiment, the surface modifier is a mixture of polyvinyl alcohol and imidazoline surfactant, and the mass ratio of the polyvinyl alcohol to the imidazoline surfactant is 1 (1-3).

In an alternative embodiment, the micro-crosslinking agent is one or a mixture of more than two of ethylene-methyl acrylate copolymer, polyethylene glycol methacrylate and fluorine-containing alkyl acrylate.

In an alternative embodiment, the polycarbonate has a melt flow rate of 10 to 20g/10min at 300℃C.1.2 kg.

In an alternative embodiment, the raw materials further comprise 5 to 20 parts of a flame retardant.

In an alternative embodiment, the feedstock further comprises 5 to 10 parts of a toughening agent.

In an alternative embodiment, the feedstock further comprises 0.1 to 0.4 parts of an antioxidant.

In an alternative embodiment, the feedstock further comprises 0.1 to 0.5 parts of a light stabilizer.

In an alternative embodiment, the raw materials further comprise 0.5-2 parts of high-color master batch.

In an alternative embodiment, the step of granulating the granulation mixture to obtain a modified polycarbonate material comprises:

granulating the granulation mixture by using a double screw extruder, wherein the length-diameter ratio of the double screw extruder is 44:1.

In an alternative embodiment, the granulation temperature at which the granulation mixture is granulated is between 230 and 320 ℃.

In a second aspect, embodiments of the present application provide a modified polycarbonate material made by the method of any one of the above.

In a third aspect, an embodiment of the present application provides an application of the modified polycarbonate material in manufacturing an electrical appliance casing.

The application has the following beneficial effects:

the preparation method of the modified polycarbonate material in the embodiment of the application uses raw materials comprising metal powder, a surface modifier and a micro cross-linking agent. The surface modifier can form a compact organic layer on the surface of the metal powder, and meanwhile, the micro cross-linking agent and the polycarbonate generate transesterification reaction to enable the metal powder and the polycarbonate to form chemical cross-linking at a two-phase interface, so that the compatibility of the metal powder and the polycarbonate is improved, and the dispersibility of the metal powder in the polycarbonate is better and the binding force is better. The modified polycarbonate material obtained by final granulation has high specific gravity and simultaneously has better material properties (such as impact resistance). In addition, the modified polycarbonate material prepared by the preparation method has high gloss and high flame retardance, and can enable electric products to be more attractive and safer when applied to an electric appliance shell.

Detailed Description

Polycarbonate (PC) materials are widely used in fields of automobiles, aerospace, home appliances, medical care, and the like due to their excellent properties such as impact resistance, light transmittance, weather resistance, heat resistance, and the like. At present, the shells of the household converters and the sockets are made of PC materials, and the PC materials after flame retardant modification have the characteristics of high gloss, high flame retardance and high impact resistance and are widely welcome in the market. In some products, novel sockets with unique shapes, such as magic square sockets, round sockets and the like, have the advantages of small volume, multiple power supply jacks, exquisite appearance and the like. However, due to the unique shape design and lighter weight, the socket is easy to slip when being touched carelessly or a power wire is tripped, so that the problems of falling, power disconnection and the like of the socket are caused. Therefore, it can be seen that such products have a problem of poor stability due to their light weight. The problem is solved in the market by increasing the weight of the socket by replacing the upper cover and the lower cover of the socket with metal materials, but the product cost is greatly increased, the linear expansion coefficients of the metal and the PC materials are greatly different, and the size matching of the shells is greatly influenced by environmental factors. In addition, there are also methods of improving the specific gravity of a material by modifying a resin base material, for example, methods of using silica powder, barium sulfate powder, or the like. However, the specific gravity of silica powder and barium sulfate powder is lower than that of metal, and a high content is needed to effectively improve the specific gravity of the material, and the high content of the silica powder and the barium sulfate powder can cause difficult dispersion of components with high specific gravity, so that the impact resistance and the flame retardant property of the modified resin are greatly reduced. If the metal powder is adopted, the specific gravity of the material can be obviously improved by a small addition amount, but the problem of the reduction of the impact resistance and the flame retardance of the material caused by doping the metal powder is still difficult to solve. The reason is that the metal powder with small particle size has high surface energy, is easy to agglomerate, is unevenly distributed in the polycarbonate, has limited interfacial binding force with the polycarbonate substrate, and particularly has the problems of poor compatibility with the substrate, difficult dispersion and the like when the content of the metal powder is high, thus leading to the reduction of the material performance.

In order to improve at least one of the defects in the prior art, the embodiment of the application provides a preparation method of a modified polycarbonate material, which improves the problem that metal powder is difficult to disperse by improving the interfacial binding force between the metal powder and polycarbonate, thereby combining high specific gravity with better impact resistance and flame retardance.

In order to make the objects, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions of the embodiments of the present application will be clearly and completely described below. The specific conditions are not noted in the examples and are carried out according to conventional conditions or conditions recommended by the manufacturer. The reagents or apparatus used were conventional products commercially available without the manufacturer's attention.

The preparation method of the modified polycarbonate provided by the embodiment of the application is as follows.

1. Preparation of granulation mixtures

In an embodiment of the present application, the step of preparing a pelletization mixture includes mixing raw materials including 10 to 40 parts by mass of metal powder, 5 to 10 parts by mass of a surface modifier, 30 to 60 parts by mass of polycarbonate, and 10 to 20 parts by mass of a micro-crosslinking agent to obtain a pelletization mixture.

Wherein the polycarbonate is used as a substrate, and the metal powder is used as a disperse phase in the polycarbonate, and the specific gravity of the metal powder is higher than that of the polycarbonate, so that the overall specific gravity of the modified polycarbonate is improved. It should be noted that in the examples of the present application, the specific gravity of the component is understood to be the density, not the proportion of the component in the modified polycarbonate; the bulk specific gravity of the modified polycarbonate is the bulk density of the modified polycarbonate. In the embodiment of the application, the particle size of the metal powder can be selected to be 30-100 nm. The metal powder can be copper powder, and the copper powder has higher specific gravity and lower price and has strong practicability. In alternative other embodiments, the metal powder may be one or a mixture of more than two of nano iron powder, nano copper powder, nano stainless steel powder, nano aluminum powder, nano nickel powder and nano silver powder. The excessive particle size of the metal powder can lead to the reduction of the impact resistance of the modified polycarbonate, so that the nanocrystallization of the metal powder is beneficial to improving the dispersion of the metal powder in the polycarbonate and reducing the negative influence on the material performance of the modified polycarbonate.

The surface modifier is used for modifying the surface of the metal powder and improving the compatibility between the metal powder and the polycarbonate. The metal powder is used as an inorganic substance and has poor original bonding property with polycarbonate which is used as an organic substance, and the metal powder with small particle size has larger surface energy, so that the metal powder is easy to agglomerate and difficult to disperse. By adding the surface modifier, a compact organic layer can be formed on the surface of the metal powder, and the binding force between the organic layer and the polycarbonate is obviously improved compared with the binding force between the metal surface and the polycarbonate. Optionally, the surface modifier is one or more than two of silane coupling agent, titanate coupling agent, polyvinyl alcohol, sodium dodecyl sulfate, sodium stearate, sodium dodecyl benzene sulfonate and imidazoline surfactant; further, the surface modifier can be selected from a mixture of polyvinyl alcohol and imidazoline surfactant, and the mass ratio of the polyvinyl alcohol to the imidazoline surfactant is 1 (1-3). When the metal powder is nano copper powder, the polyvinyl alcohol can be free from Cu on the surface of the nano copper powder ²⁺ Chelate to form chelate with stable structure, and delocalized pi bond in the molecular structure of the imidazoline surfactant can form stable pi adsorption on the surface of the nanometer copper powder, so that the two produce synergistic effect, form a compact organic layer on the surface of the nanometer copper powder, enhance the compatibility with other components in the formula, and simultaneously avoid the reduction of glossiness caused by oxidation of the nanometer metal powder after long-time contact with oxygen in the air.

The micro cross-linking agent can be one or more than two of ethylene-methyl acrylate copolymer, polyethylene glycol methacrylate and fluorine-containing alkyl acrylate. Furthermore, the micro-crosslinking agent can be selected from fluorine-containing alkyl acrylate, the compatibility of the micro-crosslinking agent and the surface modifier is good, and the micro-crosslinking agent and the surface modifier form tight combination through the hydrogen bond between molecules. More importantly, the metal powder can be subjected to transesterification reaction with polycarbonate in the granulating process (such as under the action of high-temperature and strong shearing of a double screw rod), and can be crosslinked with a macromolecular chain of the polycarbonate to a certain extent to form a unified organism, so that the metal powder and the polycarbonate are well combined, and the influence of the metal powder on the material performance of the polycarbonate is greatly reduced.

In order to enable the metal powder to be uniformly dispersed in the polycarbonate during the preparation process, the melt flow rate of the selected polycarbonate under the condition of 300 ℃/1.2kg is 10-20 g/10min. The polycarbonate has medium viscosity, and is favorable for maintaining good mechanical property and dispersion of metal powder in the polycarbonate.

In addition to increasing specific gravity, other aspects of the performance of the modified polycarbonate may be improved by the addition of other components:

optionally, the raw materials also comprise 5-20 parts of flame retardant, so that the flame retardant property of the modified polycarbonate is improved. The flame retardant can be selected from one of brominated flame retardants, sulfonate flame retardants, phosphate flame retardants and polysiloxane mixture flame retardants. Furthermore, the flame retardant can be selected as a brominated flame retardant, and the V0-level flame retardant effect can be achieved with a lower addition amount.

Optionally, the raw materials also comprise 5-10 parts of toughening agent. The toughening agent can be one or more than two of methacrylate-butadiene-styrene copolymer (MBS), ethylene-octene copolymer grafted glycidyl methacrylate (POE-g-GMA), maleic anhydride grafted glycidyl methacrylate (MAH-g-GMA) and ethylene-methacrylate (EMA). Further, the toughening agent can be POE-g-GMA, which can endow the polycarbonate with better impact resistance and increase the compatibility among the components to a certain extent.

Optionally, the raw materials also comprise 0.1 to 0.4 part of antioxidant. The antioxidant can be one or more of hindered phenols, hindered amines and phosphite antioxidants. Further, the antioxidant can be selected from a mixture of hindered phenol antioxidants and phosphite antioxidants, and the mass ratio is 1:2. The antioxidant can improve the oxidation resistance of the material, so that the material keeps stable luster and performance for a long time.

Optionally, the raw materials also comprise 0.1 to 0.5 part of light stabilizer. The light stabilizer can be a mixture of a hindered amine anti-UV agent and an ultraviolet absorber according to a mass ratio of 1:1.

In an alternative embodiment, the modified polycarbonate material further comprises 0.5 to 2 parts of high gloss masterbatch. Optionally, the highlight color master batch is a highlight master batch taking PP, ABS, PC, PMMA and the like as carriers; further alternatively, the high-gloss master batch is a high-gloss master batch taking polycarbonate as a carrier, and has good compatibility and dispersibility with polycarbonate.

The step of mixing the raw materials comprising 10 to 40 parts of metal powder, 5 to 10 parts of surface modifier, 30 to 60 parts of polycarbonate and 10 to 20 parts of micro-crosslinking agent can be realized by the following steps:

(1) 10-40 parts of metal powder and 5-10 parts of surface modifier are mixed to obtain a first raw material.

In the embodiment of the application, the step is equivalent to pretreatment of the metal powder by using a surface modifier to improve the bonding property of the surface of the metal powder and the polycarbonate. Specifically, ethanol can be used to dilute the surface modifier, then the surface modifier is mixed with the metal powder, and the mixture is slowly and uniformly stirred in a reaction kettle at the temperature of 25-50 ℃ to obtain the first raw material. Ethanol acts as a solvent, reducing the viscosity of the dispersion. Alternatively, the amount of the metal powder may be 10 parts, 20 parts, 30 parts, 40 parts, or an intermediate value of any two parts above; the amount of surface modifier may be 5 parts, 6 parts, 7 parts, 8 parts, 9 parts, 10 parts, or an intermediate value of any two parts above.

(2) The first raw material is mixed with a second raw material to obtain a pelletization mixture, wherein the second raw material comprises 30-60 parts of polycarbonate and 10-20 parts of micro-crosslinking agent.

In the embodiment of the application, the second raw material may contain other components in the raw material except the first raw material, for example, may contain 5-20 parts of flame retardant, 5-10 parts of toughening agent, 0.1-0.4 part of antioxidant, 0.1-0.5 part of light stabilizer and 0.5-2 parts of high-light color master batch. The mixing of the first feedstock and the second feedstock may be performed in a low-mix machine. Alternatively, the polycarbonate may be used in an amount of 30 parts, 35 parts, 40 parts, 45 parts, 50 parts, 55 parts, 60 parts, or an intermediate value of any two parts thereof; the micro-crosslinking agent may be used in an amount of 10 parts, 12 parts, 14 parts, 16 parts, 18 parts, 20 parts, or an intermediate value of any two parts thereof.

2. Granulating

After the pelletization mixture is prepared, pelletization can be carried out on the pelletization mixture, and the modified polycarbonate is obtained after pelletization. Optionally, the granulation mixture is granulated using a twin screw extruder. Further, the length-diameter ratio of the twin-screw extruder is 44:1, and the granulating temperature is 230-320 ℃. In the granulating process, some components in the raw materials can undergo chemical reaction, such as transesterification reaction between a micro-crosslinking agent and polycarbonate, and generate a certain degree of crosslinking with a polycarbonate macromolecular chain to form a unified organism, so that the metal powder and the polycarbonate are well combined, and the influence of the metal powder on the material performance of the polycarbonate is greatly reduced. In addition, ethanol, which is originally a mixed solvent, volatilizes in the granulating step.

Table 1 shows the raw material components (unit: parts by mass) used for the modified polycarbonate materials of the examples and comparative examples of the present application.

Table 1:

in each of the above comparative examples, the materials for each component sorting were the same as in each example except for the selection of the materials specifically described in the tables. Specifically, the metal powder is selected as nano-scale copper powder, the surface modifier is selected as a mixture of polyvinyl alcohol and imidazoline surfactant according to the proportion of 1:1-1:3, and the micro-crosslinking agent is perfluorobutyl acrylate. The materials and parts of the flame retardant, the toughening agent, the antioxidant, the light stabilizer and the high-gloss master batch are the same in each example and comparative example. The polyvinyl alcohol in the surface modifier is rich in active hydroxyl, which provides possibility for good combination of the nanometer copper powder and other components; the imidazoline surfactant is rich in an azacyclo special structure, hydrophobic long-chain carbon in a molecular structure forms a protective film which is orderly arranged on the surface of the nanometer copper powder, the contact of metal powder and easily-corroded components such as oxygen in the air is blocked, good glossiness is kept, the miscibility of a polar imidazoline group and active hydroxyl in polyvinyl alcohol is good, the mixing effect of the two components is further enhanced through the hydrogen bond action between molecular chains, and the dual synergistic effect of surface activation and barrier oxidation is achieved on the nanometer copper powder. The existence of fluorine element in the micro cross-linking agent forms good hydrogen bond combination with polyvinyl alcohol and imidazoline surfactant in the surface modifier, and on the other hand, due to the extremely low surface energy, agglomeration of nano metal powder can be effectively prevented, uniform distribution of the nano metal powder in polycarbonate is facilitated, and negative influence on polycarbonate material performance is reduced; in addition, the molecular structure of the acrylic ester can generate a certain degree of transesterification reaction with the polycarbonate, chemical crosslinking points are generated among molecular chains to generate a net structure, so that the nano metal powder treated by the surface modifier and the polycarbonate form a stable organic whole, and the comprehensive performance is better.

The performance test was performed on each of the above examples and comparative examples in the following manner:

(1) specific gravity: according to the specification of GB/T1033.1, testing the injection moulding sample bar by a densitometer;

(2) gloss after aging: the modified material is molded into a smooth sample plate, the smooth sample plate is placed in a baking oven at 100 ℃ for 168 hours, the thermal oxidative aging acceleration treatment is carried out, and then the glossiness of the surface of the sample plate is measured according to the ASTM D2457 standard at an angle of 60 degrees;

(3) notched Izod impact Strength: according to the GB/T1843 specification, performing impact test by using a cantilever impact tester;

(4) flame retardancy: the modified material was injection molded into standard bars having a thickness of 1.5mm and tested according to UL94 specifications.

Table 2 shows the results of performance tests of the modified polycarbonate materials of the examples and comparative examples of the present application.

Table 2:

by comparing the above test results, it can be seen that:

the effect of increasing the specific gravity of the metal powder was more remarkable compared to the nano silica powder (comparative example 6). In example 3, the specific gravity of the material had reached 3.62g/cm when the metal powder content had reached 30 parts ³ The notch impact strength of the cantilever beam is 36KJ/m ² Flame retardant grade V0, maintained at a higher level. However, as the metal powder content continues to increase (as in example 4), the impact properties of the material decrease, indicating that the amount added has reached saturation, but still shows a better level.

By comparing the example 1 with the comparative example 3, the gloss of the metal powder which is not treated by the surface modifier is obviously reduced after the thermal oxidation aging test, which proves that the organic layer coated by the surface modifier on the surface of the nano metal powder can effectively prevent the surface modifier from being oxidized and maintain good gloss.

Compared with the coupling agent (comparative examples 4 and 5), the modified polycarbonate treated by the surface modifier and the micro-crosslinking agent has obviously better impact resistance and flame resistance, which indicates that the metal powder is distributed in the polycarbonate more uniformly and has stronger bonding force with the polycarbonate.

The impact resistance and flame retardance of the material are poor without the use of surface modifiers and micro-crosslinking agents or when the surface modifiers or the micro-crosslinking agents are used alone, which means that the single component has limited surface modification and mixing distribution effects on the metal powder, and the best effect can be achieved when the single component is used together.

In summary, the preparation method of the modified polycarbonate material in the embodiment of the application uses the raw materials including the metal powder, the surface modifier and the micro-crosslinking agent. The surface modifier can form a compact organic layer on the surface of the metal powder, and meanwhile, the micro cross-linking agent and the polycarbonate generate transesterification reaction to enable the metal powder and the polycarbonate to form chemical cross-linking at a two-phase interface, so that the compatibility of the metal powder and the polycarbonate is improved, and the dispersibility of the metal powder in the polycarbonate is better and the binding force is better. The modified polycarbonate material obtained by final granulation has high specific gravity and simultaneously has better material properties (such as impact resistance). In addition, the modified polycarbonate material prepared by the preparation method has high gloss and high flame retardance, and can be applied to the preparation of electrical equipment shells. When the anti-theft electric appliance is applied to an electric appliance shell, the electric appliance product is more attractive and has better safety.

The above description is only of the preferred embodiments of the present application and is not intended to limit the present application, but various modifications and variations can be made to the present application by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. The preparation method of the modified polycarbonate material is characterized by comprising the following steps:

mixing raw materials comprising 10-40 parts of metal powder, 5-10 parts of surface modifier, 30-60 parts of polycarbonate and 10-20 parts of micro-crosslinking agent according to parts by weight to obtain a granulation mixture, wherein the particle size of the metal powder is 30-100 nm, the surface modifier is one or a mixture of more than two of silane coupling agent, titanate coupling agent, polyvinyl alcohol, sodium dodecyl sulfate, sodium stearate, sodium dodecyl benzene sulfonate and imidazoline surfactant, and the micro-crosslinking agent is one or a mixture of more than two of ethylene-methyl acrylate copolymer, polyethylene glycol methacrylate and fluorine-containing alkyl acrylate;

granulating the granulation mixture to obtain the modified polycarbonate material.

2. The method for producing a modified polycarbonate material according to claim 1, wherein the step of mixing raw materials comprising 10 to 40 parts of metal powder, 5 to 10 parts of a surface modifier, 30 to 60 parts of polycarbonate and 10 to 20 parts of a micro-crosslinking agent to obtain a pelletization mixture comprises:

mixing 10-40 parts of the metal powder with 5-10 parts of the surface modifier to obtain a first raw material;

the first raw material and a second raw material are mixed to obtain the granulation mixture, wherein the second raw material comprises 30-60 parts of polycarbonate and 10-20 parts of micro-crosslinking agent.

3. The method for producing a modified polycarbonate material according to claim 2, wherein the step of mixing 10 to 40 parts of the metal powder with 5 to 10 parts of the surface modifier to obtain a first raw material comprises:

and diluting the surface modifier by using ethanol, mixing the diluted surface modifier with the metal powder, and uniformly stirring at the temperature of 25-50 ℃ to obtain the first raw material.

4. The method for producing a modified polycarbonate material according to claim 1, wherein the metal powder is copper powder.

5. The method for producing a modified polycarbonate material according to claim 1, wherein the surface modifier is a mixture of polyvinyl alcohol and an imidazoline surfactant, and the mass ratio of the polyvinyl alcohol to the imidazoline surfactant is 1 (1-3).

6. The method for producing a modified polycarbonate material according to claim 1, wherein the melt flow rate of the polycarbonate is 10 to 20g/10min at 300 ℃/1.2 kg.

7. The method for producing a modified polycarbonate material according to any one of claims 1 to 6, wherein the raw material further comprises 5 to 20 parts of a flame retardant.

8. The method for producing a modified polycarbonate material according to any one of claims 1 to 6, wherein the raw material further comprises 5 to 10 parts of a toughening agent.

9. The method for producing a modified polycarbonate material according to any one of claims 1 to 6, wherein the raw material further comprises 0.1 to 0.4 parts of an antioxidant.

10. The method for producing a modified polycarbonate material according to any one of claims 1 to 6, wherein the raw material further comprises 0.1 to 0.5 parts of a light stabilizer.

11. The method for producing a modified polycarbonate material according to any one of claims 1 to 6, wherein the raw material further comprises 0.5 to 2 parts of a high-gloss masterbatch.

12. The method of producing a modified polycarbonate material according to any one of claims 1 to 6, wherein the step of granulating the granulation mixture to obtain the modified polycarbonate material comprises:

13. The method for producing a modified polycarbonate material according to any one of claims 1 to 6, wherein the granulating temperature at which the granulating mixture is granulated is 230 to 320 ℃.

14. A modified polycarbonate material, characterized in that it is produced by the production method according to any one of claims 1 to 13.

15. Use of the modified polycarbonate material of claim 14 in the manufacture of electrical housings.