Macroscopic preparation method of acrylonitrile graft modified polypropylene coarsened film
By grafting acrylonitrile onto polypropylene, its molecular structure and aggregate structure are altered, solving the problems of low-temperature embrittlement and high-temperature insulation degradation of coarsened polypropylene films in extremely cold regions, thus improving their energy storage performance.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- HEILONGJIANG ELECTRIC POWER SCIENCE RESEARCH INSTITUTE
- Filing Date
- 2026-03-19
- Publication Date
- 2026-05-08
AI Technical Summary
Polypropylene roughened films become embrittled under low-temperature conditions in extremely cold regions and suffer insulation degradation at high temperatures, affecting their energy storage performance as an insulating medium for capacitors.
Acrylonitrile was used as a grafting monomer to graft and modify polypropylene, thereby changing its molecular structure and aggregate structure, introducing carrier traps, enhancing molecular polarity and toughness, reducing free volume, and improving breakdown field strength and energy storage performance.
Through modification treatment, the low-temperature toughness and high-temperature insulation properties of the polypropylene roughened film were significantly improved, enhancing its energy storage performance in extremely cold regions and meeting the application requirements of capacitors.
Smart Images
Figure CN121991292A_ABST
Abstract
Description
Technical Field
[0001] This invention belongs to the field of electronic and electrical insulation material manufacturing technology, specifically relating to a method for the mass production and application of acrylonitrile-grafted modified polypropylene roughened film. Background Technology
[0002] The power system is a crucial infrastructure supporting national economic and social development and ensuring basic livelihoods. Deepening the implementation of the new energy security strategy, eliminating long-standing safety hazards in power grid operation, and properly responding to sudden power system failures are essential to ensuring a secure power supply, which occupies a vital position in the development of the power industry. Power capacitors are one of the important power equipment in power grid engineering. They are typically connected in parallel to the substation busbars, and their main function is to achieve reactive power compensation in the power system and improve power quality.
[0003] Polypropylene (PP), a thermoplastic obtained by polymerizing propylene monomers, has a regular structure, high crystallinity, and low price. Its production volume is enormous, ranking third among general-purpose plastics globally, and it possesses immense development potential and application value. PP exhibits excellent recyclability, processability, mechanical strength, good processing performance, chemical corrosion resistance, and excellent heat resistance. Its melting point can reach over 150℃, 40%-50% higher than polyethylene, and it can operate continuously at 100℃. Considering its superior mechanical, thermal, and electrical properties, PP is widely used as an energy storage medium in power capacitors.
[0004] Many areas in Heilongjiang, Xinjiang, and eastern Inner Mongolia in my country are located in extremely cold regions, with winter temperatures generally ranging from -10℃ to -40℃, and in extreme cases even below -55℃. In extremely cold environments (-60℃ to -40℃), the temperature difference between the outdoor low temperature and the capacitor's operating temperature significantly affects the insulation and thermal shrinkage of the capacitor film material. Long-term thermal cycling can lead to a decrease in the breakdown field strength and an increase in dielectric loss of the capacitor film. Under low-temperature conditions, the molecular chain movement of polypropylene film slows down, increasing brittleness, reducing the breakdown field strength, and increasing dielectric loss. Mechanical damage can even occur due to electrical stress, severely affecting insulation performance. Therefore, improving the performance of polypropylene roughened film under low-temperature conditions is crucial for the application of oil-immersed capacitors in extremely cold regions. Summary of the Invention
[0005] The purpose of this invention is to solve the problem that polypropylene roughened film, which is used as an insulating medium for capacitors, suffers from low-temperature embrittlement and high-temperature insulation degradation in extremely cold regions, thus affecting its energy storage performance. The invention provides a method for the large-scale preparation of acrylonitrile-grafted modified polypropylene roughened film.
[0006] A method for the mass production of acrylonitrile-grafted modified polypropylene roughened membrane is specifically carried out according to the following steps:
[0007] 1. Polypropylene, acrylonitrile, interface agent, deionized water and initiator are added to a reaction vessel and swelled at a first preset temperature for a first preset time; then a grafting reaction is carried out at a second preset temperature to obtain the reaction product.
[0008] 2. The reaction product is soaked and washed with solvent, then Soxhlet extraction is performed, followed by solid-liquid separation. The obtained solid material is dried to obtain acrylonitrile-grafted modified polypropylene.
[0009] 3. Mix polypropylene, acrylonitrile-grafted modified polypropylene and antioxidant solution, and dry to obtain a mixture.
[0010] IV. Using a film preparation device, a large quantity of the mixture is prepared into a film to obtain an acrylonitrile-grafted modified polypropylene roughened film.
[0011] Acrylonitrile-grafted modified polypropylene roughened film is used in extremely cold-resistant capacitors.
[0012] The principle of this invention:
[0013] This invention uses acrylonitrile as a grafting monomer to modify polypropylene, altering the molecular structure of polypropylene and improving the performance of the roughened polypropylene film under extremely cold conditions. By grafting polar groups, the molecular chain structure is altered, enhancing molecular polarity and changing the aggregated structure, introducing more charge carrier traps and improving its electrical properties. Acrylonitrile grafting also enhances the toughness of the polypropylene film, mitigating the effects of film embrittlement at low temperatures. Simultaneously, it reduces free volume, decreases leakage current density, and increases breakdown field strength, thereby enhancing both mechanical and electrical properties and improving the energy storage performance of the polypropylene film. Regarding the aggregated structure, acrylonitrile grafting modification reduces the size of α-crystals in the polypropylene film and generates more β-crystals. Smaller grain sizes and more β-crystals result in deeper and denser charge carrier traps on their surfaces, further improving the electrical properties of the roughened polypropylene film. Therefore, using acrylonitrile as a grafting monomer solves the problems of low-temperature embrittlement and high-temperature insulation degradation in roughened polypropylene films, improving their energy storage performance at low temperatures and meeting the application requirements in extremely cold regions.
[0014] The beneficial effects of this invention are:
[0015] I. This invention uses polypropylene, acrylonitrile, an interface agent, deionized water, and an initiator as raw materials. The polypropylene is modified using an aqueous suspension grafting method, followed by purification, blending, and mass production to prepare an acrylonitrile-grafted modified polypropylene roughened membrane. Acrylonitrile can alter the molecular and aggregated structure of polypropylene, introducing carrier traps and reducing free volume. This solves the problems of low-temperature embrittlement and high-temperature insulation degradation in the polypropylene roughened membrane, improving its energy storage performance at low temperatures and meeting its application requirements in extremely cold regions.
[0016] II. The acrylonitrile-grafted modified polypropylene roughened membrane prepared by the method of this invention, through modification of the molecular chain structure and aggregated structure, on the one hand, reduces the free volume of the polypropylene molecular chain, improves the toughness of the molecules, and solves the problem of low-temperature embrittlement of the polypropylene roughened membrane; on the other hand, the change of the polar groups and aggregated structure of acrylonitrile can generate deeper and denser carrier traps, enhance its polarity, reduce leakage current density, and improve breakdown strength, thereby enhancing energy storage performance. In summary, using acrylonitrile-grafted modified polypropylene can significantly improve the mechanical properties and energy storage performance of the polypropylene roughened membrane, solve the problems of low-temperature embrittlement and high-temperature performance degradation of the polypropylene roughened membrane; improve the performance of oil-immersed capacitors and solid-state capacitors using it as an energy storage medium in extremely cold regions; and at the same time, it can also improve the energy storage performance of power capacitors using it as an energy storage medium. Attached Figure Description
[0017] Figure 1 FT-IR image of the roughened polypropylene film prepared in Comparative Example 1;
[0018] Figure 2 FT-IR images of the acrylonitrile-grafted modified polypropylene roughened films prepared in Examples 1-4;
[0019] Figure 3 The images are DSC endothermic images of the acrylonitrile-grafted modified polypropylene roughened films prepared in Comparative Example 1 and Examples 1-3.
[0020] Figure 4 The images are DSC exothermic images of the acrylonitrile-grafted modified polypropylene roughened films prepared in Comparative Example 1 and Examples 1-3.
[0021] Figure 5 POM images of the acrylonitrile-grafted modified polypropylene roughened films prepared in Comparative Example 1 and Examples 1-4.
[0022] Figure 6 Images showing the breakdown performance of acrylonitrile-grafted modified polypropylene roughened films prepared in Comparative Example 1 and Example 2 at 25°C.
[0023] Figure 7Images showing the energy storage performance of the acrylonitrile-grafted modified polypropylene roughened membranes prepared in Comparative Example 1 and Example 2 at 25°C. Detailed Implementation
[0024] Specific Implementation Method 1: This implementation method is a large-scale preparation method of acrylonitrile-grafted modified polypropylene roughened film, which is specifically completed according to the following steps:
[0025] 1. Polypropylene, acrylonitrile, interface agent, deionized water and initiator are added to a reaction vessel and swelled at a first preset temperature for a first preset time; then a grafting reaction is carried out at a second preset temperature to obtain the reaction product.
[0026] 2. The reaction product is soaked and washed with solvent, then Soxhlet extraction is performed, followed by solid-liquid separation. The obtained solid material is dried to obtain acrylonitrile-grafted modified polypropylene.
[0027] 3. Mix polypropylene, acrylonitrile-grafted modified polypropylene and antioxidant solution, and dry to obtain a mixture.
[0028] IV. Using a film preparation device, a large quantity of the mixture is prepared into a film to obtain an acrylonitrile-grafted modified polypropylene roughened film.
[0029] Specific Implementation Method Two: This implementation method differs from Specific Implementation Method One in that the mass ratio of acrylonitrile, interface agent, deionized water, initiator, and polypropylene in step one is (0.05~0.5):(0.1~0.8):(1~6):(0.0001~0.1):1. The other steps are the same as in Specific Implementation Method One.
[0030] Specific Implementation Method Three: This implementation method differs from Specific Implementation Method One or Two in that: the interface agent mentioned in step one is at least one of xylene and cyclohexane; and / or the initiator mentioned in step one is at least one of dicumyl peroxide, benzoyl peroxide, azobisisobutyronitrile, and ammonium persulfate. Other steps are the same as in Specific Implementation Method One or Two.
[0031] Specific Implementation Method Four: This implementation method differs from Specific Implementation Methods One to Three in that: the first preset temperature in step one is 35℃~80℃, and the first preset time is 30min~360min; and / or the second preset temperature in step one is 75℃~98℃, and the grafting reaction time is 0.5h~12h. Other steps are the same as in Specific Implementation Methods One to Three.
[0032] Specific Implementation Method Five: This implementation method differs from Specific Implementation Methods One to Four in that the solvent mentioned in step two is at least one of deionized water, anhydrous ethanol, acetone, and ethyl acetate. The other steps are the same as in Specific Implementation Methods One to Four.
[0033] Specific Implementation Method Six: This implementation method differs from Specific Implementation Methods One to Five in that: the soaking and washing time in step two is 0.5 h to 48 h; and / or the Soxhlet extraction reaction in step two involves Soxhlet extraction of the washed reaction product at a temperature of 90 °C to 125 °C for 4 h to 240 h, using at least one of anhydrous ethanol, acetone, cyclohexane, and ethyl acetate as the solvent. Other steps are the same as in Specific Implementation Methods One to Five.
[0034] Specific Implementation Method Seven: This implementation method differs from Specific Implementation Methods One through Six in that: the drying temperature in step two is 30℃~90℃, and the drying time is 1h~36h; or the antioxidant solution in step three is a mixture of primary antioxidant, secondary antioxidant, and solvent in a mass ratio of (0.0001~0.01):(0.0001~0.02):(20~100), wherein the primary antioxidant is pentaerythritol tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate], β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate, and β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate. The active ingredient is at least one of the following: octadecyl 2,2'-methylenebis(4-methyl-6-tert-butylphenol), 1,1,3-tris(2-methyl-4-hydroxy-5-tert-butylphenyl)butane, and pentaerythritol diphosphite (2,4-di-tert-butylphenol); the co-antioxidant is at least one of tris(2,4-di-tert-butylphenyl phosphite), triphenyl phosphite, trinonylphenyl phosphite, dilaurate thiodipropionate, and octadecyl thiodipropionate; the solvent is at least one of deionized water, anhydrous ethanol, acetone, and ethyl acetate. Other steps are the same as in embodiments one through six.
[0035] Specific Implementation Method Eight: This implementation method differs from Specific Implementation Methods One to Seven in that: the mass ratio of polypropylene, acrylonitrile-grafted modified polypropylene, and antioxidant solution in step three is 1:(0.01~1):(0.01~0.1); or the drying temperature in step three is 30℃~90℃, and the drying time is 1h~12h. Other steps are the same as in Specific Implementation Methods One to Seven.
[0036] Specific Implementation Method Nine: This implementation method differs from Specific Implementation Methods One to Eight in that: the film preparation apparatus described in step four is a twin-screw extruder and a chiller roller; the temperatures of each zone of the twin-screw extruder are 175℃~185℃, 175℃~185℃, 175℃~185℃, 180℃~200℃, 185℃~200℃, and 190℃~210℃, respectively; the die temperature of the twin-screw extruder is 190℃~200℃; the screw speed of the twin-screw extruder is 60rpm~150rpm; and the temperature of the chiller roller is 110℃~130℃. Other steps are the same as in Specific Implementation Methods One to Eight.
[0037] Specific Embodiment Ten: An acrylonitrile-grafted modified polypropylene roughened film in this embodiment is prepared according to any one of Specific Embodiments One to Nine.
[0038] The beneficial effects of the present invention are verified using the following embodiments:
[0039] Example 1: A method for the mass production of acrylonitrile-grafted modified polypropylene roughened film, specifically carried out according to the following steps.
[0040] 1. Polypropylene, acrylonitrile, interface agent, deionized water and initiator are added to a reaction vessel and swelled at a first preset temperature for a first preset time; then a grafting reaction is carried out at a second preset temperature to obtain the reaction product.
[0041] The mass ratio of acrylonitrile, interface agent, deionized water, initiator and polypropylene mentioned in step one is 0.1:0.2:6:0.01:1;
[0042] The interface agent mentioned in step one is xylene;
[0043] The initiator mentioned in step one is benzoyl peroxide;
[0044] The first preset temperature mentioned in step one is 60℃;
[0045] The first preset time mentioned in step one is 30 minutes;
[0046] The second preset temperature mentioned in step one is 90℃;
[0047] The grafting reaction described in step one takes 2 hours;
[0048] 2. The reaction product is soaked and washed with solvent, then Soxhlet extraction is performed, followed by solid-liquid separation. The obtained solid material is dried to obtain acrylonitrile-grafted modified polypropylene.
[0049] The solvent mentioned in step two is anhydrous ethanol;
[0050] The soaking and washing time described in step two is 2 hours;
[0051] The Soxhlet extraction reaction described in step two involves Soxhlet extraction of the washed reaction product at 100°C for 12 hours. The solvent used for Soxhlet extraction is a mixture of anhydrous ethanol, acetone, and cyclohexane in a volume ratio of 1:1:2.
[0052] The drying temperature in step two is 45℃, and the drying time is 6 hours.
[0053] 3. Mix polypropylene, acrylonitrile-grafted modified polypropylene and antioxidant solution, and dry to obtain a mixture.
[0054] The antioxidant solution mentioned in step three is a mixture of a primary antioxidant, a secondary antioxidant, and a solvent in a mass ratio of 0.01:0.02:50, wherein the primary antioxidant is pentaerythritol tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate]; the secondary antioxidant is tris(2,4-di-tert-butylphenyl) phosphite; and the solvent is anhydrous ethanol.
[0055] The mass ratio of polypropylene, acrylonitrile-grafted modified polypropylene, and antioxidant solution mentioned in step three is 1:0.1:0.1;
[0056] The drying temperature in step three is 45℃, and the drying time is 6 hours.
[0057] IV. The temperatures of each zone of the twin-screw extruder are set to 175℃, 180℃, 185℃, 195℃, 200℃, and 210℃ respectively; the die temperature of the twin-screw extruder is 200℃; the screw speed of the twin-screw extruder is 60 rpm; and the temperature of the quench roll is 130℃. The mixture is fed into the hopper of the extruder, and the molten resin is drawn onto the surface of the quench roll for cooling. Then, it is unidirectionally stretched into a film and wound up to obtain an acrylonitrile-grafted modified polypropylene roughened film.
[0058] Example 2: The differences between this example and Example 1 are as follows: the mass ratio of acrylonitrile, interface agent, deionized water, initiator, and polypropylene in step one is 0.2:0.2:6:0.01:1; the first preset temperature in step one is 55℃; the grafting reaction time in step one is 4 hours; the Soxhlet extraction reaction in step two involves Soxhlet extraction of the washed reaction product at 110℃ for 24 hours, using anhydrous ethanol, acetone, and cyclohexane as the solvent in a volume ratio of 1:1:1. All other steps and parameters are the same as in Example 1.
[0059] Example 3: The differences between this example and Example 1 are as follows: the mass ratio of acrylonitrile, interface agent, deionized water, initiator, and polypropylene in step one is 0.3:0.2:6:0.01:1; the interface agent in step one is cyclohexane; the first preset temperature in step one is 50°C; the first preset time in step one is 60 min; the second preset temperature in step one is 85°C; the grafting reaction time in step one is 3 h; the Soxhlet extraction reaction in step two involves Soxhlet extraction of the washed reaction product at 115°C for 36 h, using anhydrous ethanol, acetone, and cyclohexane as the solvent in a volume ratio of 1:1:1.5. All other steps and parameters are the same as in Example 1.
[0060] Example 4: The differences between this example and Example 1 are as follows: the mass ratio of acrylonitrile, interface agent, deionized water, initiator, and polypropylene in step one is 0.4:0.2:6:0.01:1; the interface agent in step one is cyclohexane; the first preset temperature in step one is 60℃; the first preset time in step one is 90 min; the second preset temperature in step one is 90℃; the grafting reaction time in step one is 5 h; the Soxhlet extraction reaction in step two involves Soxhlet extraction of the washed reaction product at 110℃ for 24 h, using anhydrous ethanol, acetone, and cyclohexane as the solvent in a volume ratio of 1:1:1. All other steps and parameters are the same as in Example 1.
[0061] Comparative Example 1: The preparation method of the polypropylene roughened membrane is carried out according to the following steps:
[0062] The temperatures of each zone of the twin-screw extruder are set to 180℃, 185℃, 190℃, 200℃, 210℃, and 210℃ respectively; the die temperature of the twin-screw extruder is 200℃; the screw speed of the twin-screw extruder is 80 rpm; and the temperature of the chiller roller is 115℃. Raw polypropylene is fed into the hopper of the extruder, and the molten resin is drawn onto the surface of the chiller roller for cooling. Then, it is unidirectionally stretched into a film and wound up to obtain a roughened polypropylene film.
[0063] Figure 1 FT-IR image of the roughened polypropylene film prepared in Comparative Example 1;
[0064] Figure 2 FT-IR images of the acrylonitrile-grafted modified polypropylene roughened films prepared in Examples 1-4;
[0065] from Figure 1 and Figure 2 It can be seen that: the acrylonitrile-grafted polypropylene roughened film at 2355 cm⁻¹ -1 The presence of a characteristic peak of cyano groups indicates that acrylonitrile was successfully grafted onto the polypropylene roughened membrane molecular chain, and the grafting rate of acrylonitrile varied in different embodiments.
[0066] Figure 3 The images are DSC endothermic images of the acrylonitrile-grafted modified polypropylene roughened films prepared in Comparative Example 1 and Examples 1-3.
[0067] from Figure 3 It can be seen that the crystallization temperature of the original polypropylene roughened film and the acrylonitrile-grafted modified polypropylene roughened film are ideal, and the crystallinity tends to increase after acrylonitrile grafting.
[0068] Figure 4The images are DSC exothermic images of the acrylonitrile-grafted modified polypropylene roughened films prepared in Comparative Example 1 and Examples 1-3.
[0069] from Figure 4 It can be seen that the melting temperatures of the original polypropylene roughened film and the acrylonitrile-grafted modified polypropylene roughened film are ideal.
[0070] Figure 5 POM images of the acrylonitrile-grafted modified polypropylene roughened films prepared in Comparative Example 1 and Examples 1-4.
[0071] from Figure 5 It can be seen that, compared with the original polypropylene roughened film, the acrylonitrile-grafted modified polypropylene roughened film has a tendency to reduce the grain size and the crystallinity.
[0072] Figure 6 Images showing the breakdown performance of acrylonitrile-grafted modified polypropylene roughened films prepared in Comparative Example 1 and Example 2 at 25°C.
[0073] from Figure 6 It can be seen that, compared with the original polypropylene roughened film, the breakdown field strength of the acrylonitrile-grafted modified polypropylene roughened film increased from 327.2kV / mm to 633.5kV / mm, and the electrical performance was significantly improved.
[0074] Figure 7 Images showing the energy storage performance of the acrylonitrile-grafted modified polypropylene roughened membranes prepared in Comparative Example 1 and Example 2 at 25°C.
[0075] from Figure 7 It can be seen that, compared with the original polypropylene roughened membrane, the acrylonitrile grafted modified polypropylene roughened membrane has improved energy storage density and energy storage efficiency of over 90%, showing a significant improvement in energy storage performance.
Claims
1. A method for the mass production of acrylonitrile-grafted modified polypropylene roughened membrane, characterized in that... The preparation method is specifically carried out according to the following steps:
1. Polypropylene, acrylonitrile, interface agent, deionized water and initiator are added to a reaction vessel and swelled at a first preset temperature for a first preset time; then a grafting reaction is carried out at a second preset temperature to obtain the reaction product.
2. The reaction product is soaked and washed with solvent, then Soxhlet extraction is performed, followed by solid-liquid separation. The obtained solid material is dried to obtain acrylonitrile-grafted modified polypropylene.
3. Mix polypropylene, acrylonitrile-grafted modified polypropylene and antioxidant solution, and dry to obtain a mixture. IV. Using a film preparation device, a large quantity of the mixture is prepared into a film to obtain an acrylonitrile-grafted modified polypropylene roughened film.
2. The method for mass production of acrylonitrile-grafted modified polypropylene roughened membrane according to claim 1, characterized in that... The mass ratio of acrylonitrile, interface agent, deionized water, initiator and polypropylene mentioned in step one is (0.05~0.5):(0.1~0.8):(1~6):(0.0001~0.1):
1.
3. The method for mass production of acrylonitrile-grafted modified polypropylene roughened membrane according to claim 1, characterized in that... The interfacial agent mentioned in step one is at least one of xylene and cyclohexane; and / or the initiator mentioned in step one is at least one of dicumyl peroxide, benzoyl peroxide, azobisisobutyronitrile, and ammonium persulfate.
4. The method for mass production of acrylonitrile-grafted modified polypropylene roughened membrane according to claim 1, characterized in that... The first preset temperature in step one is 35℃~80℃, and the first preset time is 30min~360min; and / or the second preset temperature in step one is 75℃~98℃, and the grafting reaction time is 0.5h~12h.
5. The method for mass production of acrylonitrile-grafted modified polypropylene roughened membrane according to claim 1, characterized in that... The solvent mentioned in step two is at least one of deionized water, anhydrous ethanol, acetone, and ethyl acetate.
6. The method for mass production of acrylonitrile-grafted modified polypropylene roughened membrane according to claim 1, characterized in that... The soaking and washing time in step two is 0.5 h to 48 h; and / or the Soxhlet extraction reaction in step two involves Soxhlet extraction of the washed reaction product at a temperature of 90 °C to 125 °C for 4 h to 240 h, and the solvent used for Soxhlet extraction is at least one of anhydrous ethanol, acetone, cyclohexane and ethyl acetate.
7. The method for mass production of an acrylonitrile-grafted modified polypropylene roughened membrane according to claim 1, characterized in that... The drying temperature in step two is 30℃~90℃, and the drying time is 1h~36h. Alternatively, the antioxidant solution in step three is a mixture of primary antioxidant, secondary antioxidant, and solvent in a mass ratio of (0.0001~0.01):(0.0001~0.02):(20~100), wherein the primary antioxidant is pentaerythritol tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate], octadecyl β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate, and 2,2'-methylenebis(4-methyl-6-tert-butylphenol). 1.1.3-Tris(2-methyl-4-hydroxy-5-tert-butylphenyl)butane and pentaerythritol diphosphite of bis(2,4-di-tert-butylphenol); the co-antioxidant is at least one of tris(2,4-di-tert-butylphenyl) phosphite, triphenyl phosphite, trinonylphenyl phosphite, dilaurate of thiodipropionate and octadecyl thiodipropionate; the solvent is at least one of deionized water, anhydrous ethanol, acetone and ethyl acetate.
8. The method for mass production of acrylonitrile-grafted modified polypropylene roughened membrane according to claim 1, characterized in that... The mass ratio of polypropylene, acrylonitrile-grafted modified polypropylene and antioxidant solution in step three is 1:(0.01~1):(0.01~0.1); or the drying temperature in step three is 30℃~90℃ and the drying time is 1h~12h.
9. The method for mass production of an acrylonitrile-grafted modified polypropylene roughened membrane according to claim 1, characterized in that... The film preparation apparatus described in step four is a twin-screw extruder and a quench roll; the temperatures of each zone of the twin-screw extruder are 175℃~185℃, 175℃~185℃, 175℃~185℃, 180℃~200℃, 185℃~200℃, and 190℃~210℃, respectively; the die temperature of the twin-screw extruder is 190℃~200℃; the screw speed of the twin-screw extruder is 60rpm~150rpm; and the temperature of the quench roll is 110℃~130℃.
10. An acrylonitrile-grafted modified polypropylene roughened membrane, characterized in that... It is prepared according to the preparation method described in any one of claims 1 to 9.