CN114261982A - Preparation method of modified nano barium sulfate for photo-oxidative degradation - Google Patents
Preparation method of modified nano barium sulfate for photo-oxidative degradation Download PDFInfo
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- CN114261982A CN114261982A CN202111427206.9A CN202111427206A CN114261982A CN 114261982 A CN114261982 A CN 114261982A CN 202111427206 A CN202111427206 A CN 202111427206A CN 114261982 A CN114261982 A CN 114261982A
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- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 title claims abstract description 112
- 238000010525 oxidative degradation reaction Methods 0.000 title claims abstract description 23
- 238000002360 preparation method Methods 0.000 title claims abstract description 15
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims abstract description 39
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims abstract description 26
- AYJRCSIUFZENHW-UHFFFAOYSA-L barium carbonate Chemical compound [Ba+2].[O-]C([O-])=O AYJRCSIUFZENHW-UHFFFAOYSA-L 0.000 claims abstract description 26
- 239000004033 plastic Substances 0.000 claims abstract description 26
- 229920003023 plastic Polymers 0.000 claims abstract description 26
- 238000010438 heat treatment Methods 0.000 claims abstract description 22
- 235000021355 Stearic acid Nutrition 0.000 claims abstract description 18
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 claims abstract description 18
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 claims abstract description 18
- 239000002002 slurry Substances 0.000 claims abstract description 18
- RYYKJJJTJZKILX-UHFFFAOYSA-M sodium octadecanoate Chemical compound [Na+].CCCCCCCCCCCCCCCCCC([O-])=O RYYKJJJTJZKILX-UHFFFAOYSA-M 0.000 claims abstract description 18
- 239000008117 stearic acid Substances 0.000 claims abstract description 18
- 238000003756 stirring Methods 0.000 claims abstract description 18
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims abstract description 16
- 210000003298 dental enamel Anatomy 0.000 claims abstract description 14
- SQKWGPOIVHMUNF-UHFFFAOYSA-K cerium(3+);trichloride;hexahydrate Chemical compound O.O.O.O.O.O.[Cl-].[Cl-].[Cl-].[Ce+3] SQKWGPOIVHMUNF-UHFFFAOYSA-K 0.000 claims abstract description 13
- 238000006243 chemical reaction Methods 0.000 claims abstract description 13
- 239000012066 reaction slurry Substances 0.000 claims abstract description 11
- 238000001035 drying Methods 0.000 claims abstract description 8
- 238000007127 saponification reaction Methods 0.000 claims abstract description 8
- 239000004594 Masterbatch (MB) Substances 0.000 claims description 15
- 238000000034 method Methods 0.000 claims description 15
- 238000002156 mixing Methods 0.000 claims description 9
- 238000002844 melting Methods 0.000 claims description 6
- 230000008018 melting Effects 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- AYJRCSIUFZENHW-DEQYMQKBSA-L barium(2+);oxomethanediolate Chemical compound [Ba+2].[O-][14C]([O-])=O AYJRCSIUFZENHW-DEQYMQKBSA-L 0.000 claims description 5
- 238000007664 blowing Methods 0.000 claims description 5
- 239000002245 particle Substances 0.000 claims description 5
- 238000003825 pressing Methods 0.000 claims description 5
- 230000035484 reaction time Effects 0.000 claims description 5
- 238000005406 washing Methods 0.000 claims description 5
- 238000005469 granulation Methods 0.000 claims description 4
- 230000003179 granulation Effects 0.000 claims description 4
- 238000009474 hot melt extrusion Methods 0.000 claims description 2
- 239000000203 mixture Substances 0.000 claims 2
- 239000000654 additive Substances 0.000 abstract description 5
- 230000000996 additive effect Effects 0.000 abstract description 5
- 230000015556 catabolic process Effects 0.000 abstract description 3
- 238000006731 degradation reaction Methods 0.000 abstract description 3
- 238000010096 film blowing Methods 0.000 description 9
- 230000000694 effects Effects 0.000 description 5
- 238000001782 photodegradation Methods 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 3
- 238000001514 detection method Methods 0.000 description 3
- 230000032683 aging Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 239000003504 photosensitizing agent Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 206010019909 Hernia Diseases 0.000 description 1
- 241000282414 Homo sapiens Species 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006065 biodegradation reaction Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 229920006238 degradable plastic Polymers 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000003337 fertilizer Substances 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000002086 nanomaterial Substances 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 239000003209 petroleum derivative Substances 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 238000003900 soil pollution Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 229910052724 xenon Inorganic materials 0.000 description 1
- FHNFHKCVQCLJFQ-UHFFFAOYSA-N xenon atom Chemical compound [Xe] FHNFHKCVQCLJFQ-UHFFFAOYSA-N 0.000 description 1
Abstract
The invention discloses a preparation method of modified nano barium sulfate for photo-oxidative degradation, which comprises the following steps: (1) adding a sulfuric acid solution into an enamel reaction kettle, adding a hydrochloric acid solution, uniformly stirring, adding barium carbonate into the reaction kettle, adjusting the pH value, and fully reacting to obtain a reaction slurry for later use; (2) adding a stearic acid solution into sodium hydroxide for saponification, adding saponified sodium stearate into the slurry obtained in the step (1), and fully reacting; (3) and heating the reaction slurry, adding a cerium chloride hexahydrate solution, fully reacting, and drying to obtain the modified nano barium sulfate. The preparation method provided by the invention is simple, no additional additive is added when the photooxidative degradation film or plastic is produced, the cost is reduced, and the preparation method is environment-friendly and pollution-free.
Description
Technical Field
The invention relates to the field of inorganic nano material synthesis, in particular to a preparation method of modified nano barium sulfate for photo-oxidative degradation.
Background
At present, the plastic industry products have been used more and more widely. Because the existing plastics can not be automatically decomposed in natural environment, a large amount of plastic garbage causes serious white pollution to the environment. Especially, for agricultural mulching film plastics, a large amount of residual films can cause soil hardening, and water and fertilizer circulation is not smooth, so that the growth of crops is seriously influenced. In addition, a large number of plastic products used for packaging, catering and the like are threatening the living space of human beings increasingly, and are becoming urgent problems of world attention. The currently researched plastic degradation technologies include two types, namely photodegradation and biodegradation; the photo-degradable plastic is mainly added with a photosensitizer, the currently used photosensitizer is expensive, the cost is increased, the product price is higher than that of the existing agricultural film, and the buried part still causes soil pollution because the degradation rate is over one year due to insufficient ultraviolet absorption, so that the popularization and the application are difficult.
Barium sulfate is one of the most important inorganic chemical products nowadays, is widely applied to industries such as rubber, plastics, coatings, medicines and the like, and is also used as a weighting agent for drilling mud of petroleum and natural gas. The barium sulfate has the characteristics of acid-base resistance and good corrosion resistance, so that the barium sulfate is added into rubber and plastic products as a filler, plays the roles of increasing the volume, increasing the volume and reducing the cost, and can improve the mechanical strength, the thermodynamic property and the corrosion and aging resistance of the products.
Therefore, the modified barium sulfate for photodegradation is prepared, the corresponding cost is not increased, the environment is protected, and the method can be popularized and used in a large range.
Disclosure of Invention
In order to solve the technical problems, the invention aims to disclose a preparation method of modified nano barium sulfate for photo-oxidative degradation.
In order to achieve the purpose, the technical scheme of the invention is as follows: the modified nano barium sulfate for photo-oxidative degradation comprises the following steps:
(1) adding a sulfuric acid solution into an enamel reaction kettle, adding a hydrochloric acid solution, uniformly stirring, adding barium carbonate into the reaction kettle, adjusting the pH value, and fully reacting to obtain a reaction slurry for later use;
(2) adding a stearic acid solution into sodium hydroxide for saponification, adding saponified sodium stearate into the slurry obtained in the step (1), and fully reacting;
(3) and heating the reaction slurry, adding a cerium chloride hexahydrate solution, fully reacting, and drying to obtain the modified nano barium sulfate.
Preferably, the specific method of step (1) is as follows: putting 800-900 kg of 50 wt% sulfuric acid solution into an enamel reaction kettle, and adding a hydrochloric acid solution, wherein the final concentration of the hydrochloric acid solution is 5-15 wt%. After the stirring, the particle diameter after adding the sanding in reation kettle is 0.2 ~ 0.3um barium carbonate, and the final concentration of barium carbonate is 20 ~ 30 wt%, and the rate of addition is: 1 to 3 kg/s. And detecting the pH value, stopping adding the barium carbonate when the pH value reaches 2.0-3.0, and adjusting the pH value to 8.0-9.0 after stirring for a certain time and reacting completely. And after the enamel slurry coats the kettle, heating the slurry to 50-60 ℃ and preserving the heat for 1 hour.
Preferably, the specific method of step (2) is as follows: adding stearic acid into hot water at the temperature of 80-90 ℃ for heating and melting; adding sodium hydroxide to saponify stearic acid, wherein the mass ratio of sodium hydroxide to stearic acid is 0.15: 1, the concentration of the saponified solution is 0.1-0.4 wt%, the pH value is 8.5-9.0 after saponification is completed, and the saponified sodium stearate is added into the reacted slurry and reacted while adding, and the addition is completed within 30-60 min, and the final concentration of the sodium stearate is 2-3 wt%.
Preferably, the method for preparing nano barium sulfate according to claim 1, wherein the specific method of the step (3) is as follows: heating the reaction slurry obtained in the step (1) to 60-70 ℃, preserving heat, starting stirring, adding 1-5 wt% of a cerium chloride hexahydrate solution, wherein the mass ratio of the cerium chloride hexahydrate to the sodium stearate is 0.415: 1, reacting while adding, wherein the reaction time is 20-30 min. And after the addition, carrying out filter pressing, washing and drying to obtain the modified nano barium sulfate.
A preparation method of modified nano barium sulfate master batch comprises the following steps: mixing the modified nano barium sulfate, PE wax and POE, and extruding by using a double-screw extruder to obtain the nano barium sulfate.
Preferably, after 80-85 parts by mass of modified nano barium sulfate, 12-18 parts by mass of PE, 1-2 parts by mass of PE wax and 0.5-1 part by mass of POE are mixed, carrying out hot melt extrusion granulation by using a double screw, wherein the length-diameter ratio of the double screw is 1: 52 at a temperature of 150-160 ℃.
A method for preparing a photo-oxidative degradation film comprises the following steps: heating and uniformly mixing the nano barium sulfate master batch, PE-7042 and PE-2426H, and blowing the film to prepare the nano barium sulfate film.
Preferably, 30 parts by mass of nano barium sulfate master batch, 20 parts by mass of PE-7042 and 50 parts by mass of PE-2426H are heated, mixed uniformly and subjected to film blowing, the film blowing temperature is 140-160 ℃, and the film blowing thickness is 0.8mm, so that the nano barium sulfate film is prepared.
An application of modified nano barium sulfate in preparing photo-oxidative degradation plastics.
The invention has the beneficial effects that the modified nano barium sulfate which can be used for photo-oxidative degradation plastic is provided, the preparation method is simple, no extra additive is added when the photo-oxidative degradation film or plastic is produced, the cost is reduced, and the nano barium sulfate is environment-friendly and pollution-free.
Detailed Description
The concept and technical effects of the present invention will be clearly and completely described below in conjunction with the embodiments to fully understand the objects, features and effects of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and those skilled in the art can obtain other embodiments without inventive effort based on the embodiments of the present invention, and all embodiments are within the protection scope of the present invention.
Example 1
The nano barium sulfate is prepared according to the following method: 800kg of 50 wt% sulfuric acid solution is put into an enamel reaction kettle, and hydrochloric acid solution is added, wherein the final concentration of the hydrochloric acid solution is 5 wt%. After the stirring, the particle diameter after adding the sanding in reation kettle is 0.2um barium carbonate, and the final concentration of barium carbonate is 20 wt%, and rate of addition is: 1 kg/s. And (3) detecting the pH value, stopping adding the barium carbonate when the pH value reaches 2.0, and adjusting the pH value to 8.0 after stirring for a certain time and reacting completely. After the enamel slurry is coated on the kettle, heating the slurry to 50 ℃, and preserving the heat for 1 hour for later use.
Adding stearic acid into hot water of 80 ℃ for heating and melting; adding sodium hydroxide to saponify stearic acid, wherein the mass ratio of sodium hydroxide to stearic acid is 0.15: 1, the concentration of the saponified solution is 0.1 wt%, the pH after saponification is 8.5, the saponified sodium stearate is added to the reacted slurry, the reaction is carried out while adding, and the addition is completed within 30min, and the final concentration of the sodium stearate is 2 wt%.
Heating the reaction slurry to 60 ℃, preserving heat, starting stirring, adding 1 wt% of cerium chloride hexahydrate solution, wherein the mass ratio of the cerium chloride hexahydrate to the sodium stearate is 0.415: 1, reacting while adding, wherein the reaction time is 20 min. And after the addition, carrying out filter pressing, washing and drying to obtain the modified nano barium sulfate.
Example 2
The nano barium sulfate is prepared according to the following method: 900kg of 50 wt% sulfuric acid solution is put into an enamel reaction kettle, and hydrochloric acid solution is added, wherein the final concentration of the hydrochloric acid solution is 15 wt%. After the stirring, the particle diameter after adding the sanding in reation kettle is 0.3um barium carbonate, and the final concentration of barium carbonate is 30 wt%, and rate of addition is: 3 kg/s. And (3) detecting the pH value, stopping adding the barium carbonate when the pH value reaches 3.0, and adjusting the pH value to 9.0 after stirring for a certain time and reacting completely. After the enamel slurry is coated on the kettle, heating the slurry to 60 ℃ and preserving the heat for 1 hour for later use.
Adding stearic acid into hot water of 90 ℃ to be heated and melted; adding sodium hydroxide to saponify stearic acid, wherein the mass ratio of sodium hydroxide to stearic acid is 0.15: 1, the concentration of the saponified solution is 0.4 wt%, the pH after saponification is 9.0, the saponified sodium stearate is added to the reacted slurry, the reaction is carried out while adding, the addition is completed in 60min, and the final concentration of the sodium stearate is 3 wt%.
Heating the reaction slurry to 70 ℃, preserving heat, starting stirring, adding a 5 wt% cerium chloride hexahydrate solution, wherein the mass ratio of the cerium chloride hexahydrate to the sodium stearate is 0.415: 1, reacting while adding, wherein the reaction time is 30 min. And after the addition, carrying out filter pressing, washing and drying to obtain the modified nano barium sulfate.
Example 3
The modified nano barium sulfate in example 1 was treated in the following manner: mixing 80 parts by mass of modified nano barium sulfate, 12 parts by mass of PE, 1 part by mass of PE wax and 0.5 part by mass of POE, and then carrying out hot melting extrusion granulation by using double screws, wherein the length-diameter ratio of the double screws is 1: 52 at a temperature of 150 ℃. Obtaining the modified nano barium sulfate master batch.
Example 4
The modified nano barium sulfate in example 2 was treated in the following manner: mixing 85 parts by mass of modified nano barium sulfate, 18 parts by mass of PE, 2 parts by mass of PE wax and 1 part by mass of POE, and then carrying out hot melting extrusion granulation by using double screws, wherein the length-diameter ratio of the double screws is 1: 52 at a temperature of 160 ℃. Obtaining the modified nano barium sulfate master batch.
Example 5
The nano modified barium sulfate master batch of example 3 or 4 was used as an additive to prepare a plastic with good photodegradation effect: heating and uniformly mixing 30 parts by mass of nano barium sulfate master batch, 20 parts by mass of PE-7042 and 50 parts by mass of PE-2426H, and blowing the film at the film blowing temperature of 140-160 ℃ and the film blowing thickness of 0.8 mm. And obtaining the blown film plastic.
Comparative example 1
Ordinary barium sulfate is used as an additive to prepare plastic with good photodegradation effect: heating and uniformly mixing 30 parts by mass of common barium sulfate, 20 parts by mass of PE-7042 and 50 parts by mass of PE-2426H, and blowing the film at the temperature of 140-160 ℃ and the thickness of 0.8 mm. And obtaining the blown film plastic.
Comparative example 2
CA75 photo-oxidative degradation master batch purchased from a certain factory is used as an additive to prepare plastic with good photo-degradation effect: heating and uniformly mixing 30 parts by mass of CA75 photo-oxidative degradation master batch, 20 parts by mass of PE-7042 and 50 parts by mass of PE-2426H, and blowing the film at the film blowing temperature of 140-160 ℃ and the film blowing thickness of 0.8 mm. And obtaining the blown film plastic.
Examples of the experiments
The blown film plastic of example 5 was subjected to photo-oxidative degradation detection according to the following detection standards: GB/T1040.3-2006 section 3 of determination of tensile Properties of plastics: film and sheet testing conditions, GB/T16422.2-2014 Plastic laboratory light Source Exposure test method part 2: xenon arc lamps, GB/T20197-. The detection method comprises the following steps: and (5) testing the photo-oxidative degradation performance after the hernia lamp aging box is placed for 24 hours. The film blowing plastic added with common barium sulfate and the film blowing plastic added with the model number CA75 photo-oxidative degradation master batch are used as comparative examples, and the results are as follows:
as can be seen from the above table, the nano barium sulfate prepared by the technical scheme is added into the plastic, so that the photo-oxidative degradation of the plastic can be greatly increased, and the improvement is remarkable.
While the preferred embodiments of the present invention have been illustrated and described, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. A preparation method of modified nano barium sulfate for photo-oxidative degradation is characterized by comprising the following steps:
(1) adding a sulfuric acid solution into an enamel reaction kettle, adding a hydrochloric acid solution, uniformly stirring, adding barium carbonate into the reaction kettle, adjusting the pH value, and fully reacting to obtain a reaction slurry for later use;
(2) adding a stearic acid solution into sodium hydroxide for saponification, adding saponified sodium stearate into the slurry obtained in the step (1), and fully reacting;
(3) and heating the reaction slurry, adding a cerium chloride hexahydrate solution, fully reacting, and drying to obtain the modified nano barium sulfate.
2. The method for preparing nano barium sulfate according to claim 1, wherein the specific method of the step (1) is as follows: putting 800-900 kg of 50 wt% sulfuric acid solution into an enamel reaction kettle, and adding a hydrochloric acid solution, wherein the final concentration of the hydrochloric acid solution is 5-15 wt%. After the stirring, the particle diameter after adding the sanding in reation kettle is 0.2 ~ 0.3um barium carbonate, and the final concentration of barium carbonate is 20 ~ 30 wt%, and the rate of addition is: 1 to 3 kg/s. And detecting the pH value, stopping adding the barium carbonate when the pH value reaches 2.0-3.0, and adjusting the pH value to 8.0-9.0 after stirring for a certain time and reacting completely. And after the enamel slurry coats the kettle, heating the slurry to 50-60 ℃ and preserving the heat for 1 hour.
3. The method for preparing nano barium sulfate according to claim 1, wherein the specific method of the step (2) is as follows: adding stearic acid into hot water at the temperature of 80-90 ℃ for heating and melting; adding sodium hydroxide to saponify stearic acid, wherein the mass ratio of sodium hydroxide to stearic acid is 0.15: 1, the concentration of the saponified solution is 0.1-0.4 wt%, the pH value is 8.5-9.0 after saponification is completed, and the saponified sodium stearate is added into the reacted slurry and reacted while adding, and the addition is completed within 30-60 min, and the final concentration of the sodium stearate is 2-3 wt%.
4. The method for preparing nano barium sulfate according to claim 1, wherein the specific method of the step (3) is as follows: heating the reaction slurry obtained in the step (1) to 60-70 ℃, preserving heat, starting stirring, adding 1-5 wt% of a cerium chloride hexahydrate solution, wherein the mass ratio of the cerium chloride hexahydrate to the sodium stearate is 0.415: 1, reacting while adding, wherein the reaction time is 20-30 min. And after the addition, carrying out filter pressing, washing and drying to obtain the modified nano barium sulfate.
5. A preparation method of modified nano barium sulfate for photo-oxidative degradation is characterized by comprising the following steps:
(1) putting 800-900 kg of 50 wt% sulfuric acid solution into an enamel reaction kettle, and adding a hydrochloric acid solution, wherein the final concentration of the hydrochloric acid solution is 5-15 wt%; after the stirring, the particle diameter after adding the sanding in reation kettle is 0.2 ~ 0.3um barium carbonate, and the final concentration of barium carbonate is 20 ~ 30 wt%, and the rate of addition is: 1-3 kg/s; detecting the pH value, stopping adding barium carbonate when the pH value reaches 2.0-3.0, and adjusting the pH value to 8.0-9.0 after stirring for a certain time and reacting completely; heating the enamel slurry to 50-60 ℃ after the enamel slurry covers the kettle, and keeping the temperature for 1 hour;
(2) adding stearic acid into hot water at the temperature of 80-90 ℃ for heating and melting; adding sodium hydroxide to saponify stearic acid, wherein the mass ratio of sodium hydroxide to stearic acid is 0.15: 1, the concentration of the saponified solution is 0.1-0.4 wt%, the pH value is 8.5-9.0 after saponification is completed, the saponified sodium stearate is added into the reacted slurry and reacted while adding, the addition is completed within 30-60 min, and the final concentration of the sodium stearate is 2-3 wt%;
(3) heating the reaction slurry obtained in the step (1) to 60-70 ℃, preserving heat, starting stirring, adding 1-5 wt% of a cerium chloride hexahydrate solution, wherein the mass ratio of the cerium chloride hexahydrate to the sodium stearate is 0.415: 1, reacting while adding, wherein the reaction time is 20-30 min; and after the addition, carrying out filter pressing, washing and drying to obtain the modified nano barium sulfate.
6. A preparation method of modified nano barium sulfate master batch is characterized in that the modified nano barium sulfate master batch is obtained by mixing modified nano barium sulfate, PE wax and POE and then extruding the mixture by a double-screw extruder.
7. The preparation method of the modified nano barium sulfate master batch according to claim 5, wherein 80-85 parts by mass of the modified nano barium sulfate, 12-18 parts by mass of PE, 1-2 parts by mass of PE wax and 0.5-1 part by mass of POE are mixed, and then the mixture is subjected to hot melt extrusion granulation by using double screws, wherein the length-diameter ratio of the double screws is 1: 52 at a temperature of 150-160 ℃.
8. A preparation method of a photo-oxidative degradation film is characterized in that nano barium sulfate master batch, PE-7042 and PE-2426H are heated, mixed uniformly and blown to prepare the photo-oxidative degradation film.
9. The method for preparing a photo-oxidative degradation film according to claim 7, wherein the photo-oxidative degradation film is prepared by heating and uniformly mixing 30 parts by mass of nano barium sulfate master batch, 20 parts by mass of PE-7042 and 50 parts by mass of PE-2426H, and blowing the film at a temperature of 140-160 ℃ and a thickness of 0.8 mm.
10. Use of the modified nano barium sulfate according to any one of claims 1 to 5 in the preparation of photo-oxidative degradation plastics.
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