A PVC calendering film matrix photocatalytic material and preparation method thereof

Abstract

The present invention provides a PVC calendered film matrix photocatalytic material and a preparation method thereof, belonging to the field of calendered film matrix photocatalytic materials. The PVC calendered film matrix photocatalytic material is prepared from raw materials such as polyvinyl chloride, an elastomer, a composite plasticizer, a stabilizer, a solid waste photocatalytic filler, and manganese slag ultrafine powder. The solid waste photocatalytic filler is TiO2 modified from electric furnace ash. The manganese slag ultrafine powder is manganese slag ground to 1500-2000 mesh by an ultrafine tire vertical mill. The present invention solves the industry bottlenecks of using titanium dioxide to produce PVC calendered film matrix materials, such as high price, large primary resource consumption, and single performance; and the technical limitations of the wear resistance and weather resistance of the PVC calendered film matrix material needing to be improved. At the same time, the present invention uses solid waste such as electric furnace ash ultrafine powder and manganese slag ultrafine powder as raw materials to prepare the calendered film matrix material, which meets the current industrial development requirements of energy conservation, environmental protection, and circular economy.

Description

Technical Field

[0001] The invention belongs to the field of calendered film substrate materials, and particularly relates to a PVC calendered film substrate photocatalytic material and a preparation method thereof. Background Art

[0002] Polyvinyl chloride (PVC) calendered film is typically produced through a calendering process. Calendering involves passing heated PVC plastic through the gap between one or more pairs of counter-rotating horizontal rollers, extruding and stretching the material to form a thin product with a defined thickness, width, and smooth surface. Titanium dioxide and calcium carbonate are the most commonly used fillers in PVC calendering production. However, the limited properties of titanium dioxide and calcium carbonate significantly increase the production cost of PVC calendered film.

[0003] Electric furnace ash is the dust collected during steelmaking in an electric furnace after passing through a collector, flue, and finally a bag filter. Its main chemical composition is Fe / Fe2O3. Manganese slag is a large amount of waste slag produced during the electrolytic manganese production process. Its main components are CaO, SiO2, and MnO. It has better wear resistance than ordinary silicate materials (such as steel slag and blast furnace slag). If ultrafine powders of electric furnace ash and manganese slag can be produced using ultrafine tire vertical mills (also known as "ultrafine roller mills"), they can be used to modify titanium dioxide and improve wear resistance, thereby reducing the production cost of PVC calendering film substrate materials and further improving related properties.

[0004] Therefore, the inventors have developed and used an ultrafine tire vertical mill (also known as "ultrafine roller mill") to form 2000-2500 mesh electric furnace ash ultrafine powder and 1500-2000 mesh manganese slag ultrafine powder, and prepared a PVC calendering film matrix photocatalytic material by combining general plastics, elastomers, composite plasticizers, stabilizers, solid waste photocatalytic fillers and manganese slag ultrafine powder, in order to solve the above problems and meet the current energy conservation, environmental protection and circular economy industrial development requirements. Summary of the Invention

[0005] In order to solve the industry bottleneck of using titanium dioxide (TiO2) to produce PVC calendered film base materials, which has high price, large primary resource consumption and single performance; the wear resistance and weather resistance of PVC calendered film base materials need to be improved; the use of conical vertical mill and ordinary tire vertical mill can only process materials to a fineness of 450 mesh and a specific surface area of ​​500m 2 The present invention utilizes an ultrafine tire vertical mill (also known as "ultrafine roller mill") to produce 2000-2500 mesh electric furnace ash ultrafine powder and 1500-2000 mesh manganese slag ultrafine powder. This material is then combined with general-purpose plastics, elastomers, composite plasticizers, stabilizers, solid waste photocatalytic fillers, and the manganese slag ultrafine powder to prepare a PVC calendering film matrix photocatalytic material, aiming to address the above-mentioned issues.

[0006] In order to solve the above technical problems, the present invention is implemented through the following technical solutions.

[0007] The present invention provides a PVC calendered film matrix photocatalytic material, and the raw materials of the PVC calendered film matrix photocatalytic material are as follows in terms of weight percentage:

[0008]

[0009] The general plastic is polyvinyl chloride.

[0010] The solid waste photocatalytic filler is TiO2 modified from electric furnace ash. The ash is ground to a mesh size of 2000-2500 using an ultrafine tire vertical mill (also known as an "ultrafine roller mill"). The ultrafine powder is then mixed with tetrabutyl titanate in a mass ratio of 1:20-1:30, and the resulting TiO2 is formed via a sol-gel method. The chemical composition (by mass fraction) of the ash is Fe3O4 (0.34%), FeO (8.91%), Fe / Fe2O3 (58.65%), SiO2 (2.06%), CaO (2.92%), MgO (1.38%), Al2O3 (0.56%), K (1.32%), Na (1.32%), C (1.14%), Zn (2.61%), and others (18.79%).

[0011] The manganese slag ultrafine powder is obtained by grinding the manganese slag into 1500-2000 meshes through an ultrafine tire vertical mill (also known as "ultrafine roller milling"). The chemical composition (mass fraction) of the manganese slag is SiO2 (20.05%), Al2O3 (16.42%), CaO (37.62%), MgO (6.52%), SO3 (0.48%), Fe2O3 (1.23%), MnO (10.87%), TiO2 (0.42%) and others (6.39%).

[0012] The elastomer is nitrile rubber.

[0013] The composite plasticizer is a mixture of dibutyl phthalate and diethyl phthalate, with a mass ratio of 3:1 to 1:3.

[0014] The stabilizer is BS-105 rare earth composite heat stabilizer.

[0015] The present invention also provides a method for preparing the above-mentioned PVC calendered film matrix photocatalytic material, which specifically comprises the following steps:

[0016] General plastics, elastomers, composite plasticizers, stabilizers, solid waste photocatalytic fillers and manganese slag ultrafine powder are premixed in a high-speed mixer for 15 to 30 minutes; after mixing for 10 to 20 minutes in a two-roll mill with a front and rear roller temperature of 150 to 175° C. and a roller distance of 1 mm, a PVC calendering film matrix photocatalytic material precursor is obtained; the PVC calendering film matrix photocatalytic material precursor is hot-pressed on a hydraulic flat press at 180 to 200° C. for 15 to 30 minutes to obtain the PVC calendering film matrix photocatalytic material.

[0017] The innovation of the present invention:

[0018] (1) The ultrafine powder of 2000-2500 mesh electric furnace ash and the ultrafine powder of 1500-2000 mesh manganese slag are formed by grinding with ultrafine tire vertical mill (also known as "ultrafine roller mill"), and their morphology is gravel-like (such as prismatic, sub-prismatic, sub-circular). It not only breaks through the fineness of 450 mesh and specific surface area of ​​500m3 of ordinary tire vertical mill (also known as "ordinary roller mill"), but also breaks through the fineness of 450 mesh and specific surface area of ​​500m3 of ordinary tire vertical mill (also known as "ordinary roller mill"), which can only grind the powder with fineness of 450 mesh and specific surface area of ​​500m3. 2 / kg technical barriers.

[0019] (2) Manganese slag contains a high content of SiO2 and the MnO content in silicon manganese slag is greater than 10%. It has better wear resistance than ordinary silicate materials (such as steel slag, blast furnace slag, etc.), and can improve the relevant properties of PVC calendering film base materials.

[0020] (3) Electric furnace ash contains a high amount of Fe3O4, FeO, and Fe / Fe2O3. Hydrochloric acid solution is used to partially dissolve the Fe3O4, FeO, and Fe / Fe2O3 contained in the electric furnace ash and then modify the TiO2 to achieve the purpose of photocatalytic degradation of formaldehyde under visible light. At the same time, TiO2 can promote the hydration speed and quality of silicates, and improve the flexural strength and impact strength.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] 1. The present invention solves the bottleneck of using titanium dioxide (TiO2) to produce PVC calendered film base materials, which has the problems of high price, large primary resource consumption and single performance; the wear resistance and weather resistance of PVC calendered film base materials need to be improved; the use of conical vertical mill and ordinary tire vertical mill can only process materials to a fineness of 450 mesh and a specific surface area of ​​500m 2 / kg technical limitations.

[0023] 2. The present invention utilizes solid waste resources such as electric furnace ash ultrafine powder and manganese slag ultrafine powder as raw materials to prepare PVC calendering film matrix photocatalytic materials, which meets the current industrial development requirements of energy conservation, environmental protection and circular economy. DETAILED DESCRIPTION

[0024] The present invention is described in detail below with reference to specific embodiments, but the present invention is not limited to the following embodiments.

[0025] Example 1

[0026] The components and their mass ratios used in preparing 100g of the product of the present invention are as follows:

[0027]

[0028] The general plastic is polyvinyl chloride.

[0029] The elastomer is nitrile rubber.

[0030] The composite plasticizer is a mixture of dibutyl phthalate and diethyl phthalate, with a mass ratio of 3:1.

[0031] The stabilizer is BS-105 rare earth composite heat stabilizer.

[0032] The solid waste photocatalytic filler is TiO2 modified from electric furnace ash. The ash is ground to 2500 mesh using an ultrafine tire vertical mill (also known as an "ultrafine roller mill"). The ultrafine powder is then mixed with tetrabutyl titanate in a mass ratio of 1:24 and formed via a sol-gel method. The chemical composition (by mass fraction) of the ash is Fe3O4 (0.34%), FeO (8.91%), Fe / Fe2O3 (58.65%), SiO2 (2.06%), CaO (2.92%), MgO (1.38%), Al2O3 (0.56%), K (1.32%), Na (1.32%), C (1.14%), Zn (2.61%), and others (18.79%).

[0033] The manganese slag ultrafine powder is manganese slag that is ground into 2000 mesh by an ultrafine tire vertical mill (also known as "ultrafine roller mill"), and the chemical composition (mass fraction) of the manganese slag is SiO2 (20.05%), Al2O3 (16.42%), CaO (37.62%), MgO (6.52%), SO3 (0.48%), Fe2O3 (1.23%), MnO (10.87%), TiO2 (0.42%) and others (6.39%).

[0034] General plastics, elastomers, composite plasticizers, stabilizers, solid waste photocatalytic fillers and manganese slag ultrafine powder are premixed in a high-speed mixer for 15 minutes; after mixing in a two-roll mill with a front and rear roller temperature of 175°C and a roller distance of 1 mm for 20 minutes, a PVC calendering film matrix photocatalytic material precursor is obtained; the PVC calendering film matrix photocatalytic material precursor is hot-pressed on a hydraulic flat press at 190°C for 30 minutes to obtain a PVC calendering film matrix photocatalytic material.

[0035] Example 2

[0036] The components and their mass ratios used in preparing 100g of the product of the present invention are as follows:

[0037]

[0038] The general plastic is polyvinyl chloride.

[0039] The elastomer is nitrile rubber.

[0040] The composite plasticizer is a mixture of dibutyl phthalate and diethyl phthalate, with a mass ratio of 1:3.

[0041] The stabilizer is BS-105 rare earth composite heat stabilizer.

[0042] The solid waste photocatalytic filler is TiO2 modified from electric furnace ash. The ash is ground to 2000 mesh using an ultrafine tire vertical mill (also known as an "ultrafine roller mill"). The ultrafine powder is then mixed with tetrabutyl titanate in a mass ratio of 1:28 and formed via a sol-gel method. The chemical composition (by mass fraction) of the ash is Fe3O4 (0.34%), FeO (8.91%), Fe / Fe2O3 (58.65%), SiO2 (2.06%), CaO (2.92%), MgO (1.38%), Al2O3 (0.56%), K (1.32%), Na (1.32%), C (1.14%), Zn (2.61%), and others (18.79%).

[0043] The manganese slag ultrafine powder is manganese slag that is ground into 1500 mesh by an ultrafine tire vertical mill (also known as "ultrafine roller mill"), and the chemical composition (mass fraction) of the manganese slag is SiO2 (20.05%), Al2O3 (16.42%), CaO (37.62%), MgO (6.52%), SO3 (0.48%), Fe2O3 (1.23%), MnO (10.87%), TiO2 (0.42%) and others (6.39%).

[0044] General plastics, elastomers, composite plasticizers, stabilizers, solid waste photocatalytic fillers and manganese slag ultrafine powder are premixed in a high-speed mixer for 25 minutes; after mixing for 10 minutes in a two-roll mill with a front and rear roller temperature of 150°C and a roller distance of 1 mm, a PVC calendering film matrix photocatalytic material precursor is obtained; the PVC calendering film matrix photocatalytic material precursor is hot-pressed on a hydraulic flat press at 200°C for 20 minutes to obtain a PVC calendering film matrix photocatalytic material.

[0045] Example 3

[0046] The components and their mass ratios used in preparing 100g of the product of the present invention are as follows:

[0047]

[0048] The general plastic is polyvinyl chloride.

[0049] The elastomer is nitrile rubber.

[0050] The composite plasticizer is a mixture of dibutyl phthalate and diethyl phthalate, with a mass ratio of 1:1.

[0051] The stabilizer is BS-105 rare earth composite heat stabilizer.

[0052] The solid waste photocatalytic filler is TiO2 modified from electric furnace ash. The ash is ground to 2400 mesh using an ultrafine tire vertical mill (also known as an "ultrafine roller mill"). The ultrafine powder is then mixed with tetrabutyl titanate in a mass ratio of 1:30, and the resulting TiO2 is formed via a sol-gel method. The chemical composition (by mass fraction) of the ash is Fe3O4 (0.34%), FeO (8.91%), Fe / Fe2O3 (58.65%), SiO2 (2.06%), CaO (2.92%), MgO (1.38%), Al2O3 (0.56%), K (1.32%), Na (1.32%), C (1.14%), Zn (2.61%), and others (18.79%).

[0053] The manganese slag ultrafine powder is manganese slag that is ground into 1600 mesh by an ultrafine tire vertical mill (also known as "ultrafine roller mill"), and the chemical composition (mass fraction) of the manganese slag is SiO2 (20.05%), Al2O3 (16.42%), CaO (37.62%), MgO (6.52%), SO3 (0.48%), Fe2O3 (1.23%), MnO (10.87%), TiO2 (0.42%) and others (6.39%).

[0054] General plastics, elastomers, composite plasticizers, stabilizers, solid waste photocatalytic fillers and manganese slag ultrafine powder are premixed in a high-speed mixer for 30 minutes; after mixing in a two-roll mill with a front and rear roller temperature of 165°C and a roller distance of 1 mm for 15 minutes, a PVC calendering film matrix photocatalytic material precursor is obtained; the PVC calendering film matrix photocatalytic material precursor is hot-pressed on a hydraulic flat press at 180°C for 15 minutes to obtain a PVC calendering film matrix photocatalytic material.

[0055] Example 4

[0056] The components and their mass ratios used in preparing 100g of the product of the present invention are as follows:

[0057]

[0058]

[0059] The general plastic is polyvinyl chloride.

[0060] The elastomer is nitrile rubber.

[0061] The composite plasticizer is a mixture of dibutyl phthalate and diethyl phthalate, with a mass ratio of 1:2.

[0062] The stabilizer is BS-105 rare earth composite heat stabilizer.

[0063] The solid waste photocatalytic filler is TiO2 modified from electric furnace ash. The ash is ground to 2200 mesh using an ultrafine tire vertical mill (also known as an "ultrafine roller mill"). The ultrafine powder is then mixed with tetrabutyl titanate in a mass ratio of 1:20 and formed via a sol-gel method. The chemical composition (by mass fraction) of the ash is Fe3O4 (0.34%), FeO (8.91%), Fe / Fe2O3 (58.65%), SiO2 (2.06%), CaO (2.92%), MgO (1.38%), Al2O3 (0.56%), K (1.32%), Na (1.32%), C (1.14%), Zn (2.61%), and others (18.79%).

[0064] The manganese slag ultrafine powder is obtained by grinding the manganese slag into 1900 mesh manganese slag ultrafine powder through an ultrafine tire vertical mill (also known as "ultrafine roller grinding"). The chemical composition (mass fraction) of the manganese slag is SiO2 (20.05%), Al2O3 (16.42%), CaO (37.62%), MgO (6.52%), SO3 (0.48%), Fe2O3 (1.23%), MnO (10.87%), TiO2 (0.42%) and others (6.39%).

[0065] General plastics, elastomers, composite plasticizers, stabilizers, solid waste photocatalytic fillers and manganese slag ultrafine powder are premixed in a high-speed mixer for 20 minutes; after mixing for 10 minutes in a two-roll mill with a front and rear roller temperature of 170°C and a roller distance of 1 mm, a PVC calendering film matrix photocatalytic material precursor is obtained; the PVC calendering film matrix photocatalytic material precursor is hot-pressed on a hydraulic flat press at 195°C for 25 minutes to obtain a PVC calendering film matrix photocatalytic material.

[0066] Example 5

[0067] The components and their mass ratios used in preparing 100g of the product of the present invention are as follows:

[0068]

[0069]

[0070] The general plastic is polyvinyl chloride.

[0071] The elastomer is nitrile rubber.

[0072] The composite plasticizer is a mixture of dibutyl phthalate and diethyl phthalate, with a mass ratio of 2:1.

[0073] The stabilizer is BS-105 rare earth composite heat stabilizer.

[0074] The solid waste photocatalytic filler is TiO2 modified from electric furnace ash. The ash is ground to 2100 mesh using an ultrafine tire vertical mill (also known as an "ultrafine roller mill"). The ultrafine powder is mixed with tetrabutyl titanate in a mass ratio of 1:22, and the resulting TiO2 is formed via a sol-gel method. The chemical composition (by mass fraction) of the ash is Fe3O4 (0.34%), FeO (8.91%), Fe / Fe2O3 (58.65%), SiO2 (2.06%), CaO (2.92%), MgO (1.38%), Al2O3 (0.56%), K (1.32%), Na (1.32%), C (1.14%), Zn (2.61%), and others (18.79%).

[0075] The manganese slag ultrafine powder is manganese slag that is ground into 1800 mesh by an ultrafine tire vertical mill (also known as "ultrafine roller mill"), and the chemical composition (mass fraction) of the manganese slag is SiO2 (20.05%), Al2O3 (16.42%), CaO (37.62%), MgO (6.52%), SO3 (0.48%), Fe2O3 (1.23%), MnO (10.87%), TiO2 (0.42%) and others (6.39%).

[0076] General plastics, elastomers, composite plasticizers, stabilizers, solid waste photocatalytic fillers and manganese slag ultrafine powder are premixed in a high-speed mixer for 30 minutes; after mixing in a two-roll mill with a front and rear roller temperature of 155°C and a roller distance of 1 mm for 20 minutes, a PVC calendering film matrix photocatalytic material precursor is obtained; the PVC calendering film matrix photocatalytic material precursor is hot-pressed on a hydraulic flat press at 185°C for 15 minutes to obtain a PVC calendering film matrix photocatalytic material.

[0077] Example 6

[0078] The components and their mass ratios used in preparing 100g of the product of the present invention are as follows:

[0079]

[0080] The general plastic is polyvinyl chloride.

[0081] The elastomer is nitrile rubber.

[0082] The composite plasticizer is a mixture of dibutyl phthalate and diethyl phthalate, with a mass ratio of 1:1.

[0083] The stabilizer is BS-105 rare earth composite heat stabilizer.

[0084] The solid waste photocatalytic filler is TiO2 modified from electric furnace ash. The ash is ground to 2300 mesh using an ultrafine tire vertical mill (also known as an "ultrafine roller mill"). The ultrafine powder is then mixed with tetrabutyl titanate in a mass ratio of 1:26 and formed via a sol-gel method. The chemical composition (by mass fraction) of the ash is Fe3O4 (0.34%), FeO (8.91%), Fe / Fe2O3 (58.65%), SiO2 (2.06%), CaO (2.92%), MgO (1.38%), Al2O3 (0.56%), K (1.32%), Na (1.32%), C (1.14%), Zn (2.61%), and others (18.79%).

[0085] The manganese slag ultrafine powder is manganese slag that is ground into 1700 mesh by an ultrafine tire vertical mill (also known as "ultrafine roller milling"). The chemical composition (mass fraction) of the manganese slag is SiO2 (20.05%), Al2O3 (16.42%), CaO (37.62%), MgO (6.52%), SO3 (0.48%), Fe2O3 (1.23%), MnO (10.87%), TiO2 (0.42%) and others (6.39%).

[0086] General plastics, elastomers, composite plasticizers, stabilizers, solid waste photocatalytic fillers and manganese slag ultrafine powder are premixed in a high-speed mixer for 25 minutes; after mixing for 15 minutes in a two-roll mill with a front and rear roller temperature of 160°C and a roller distance of 1 mm, a PVC calendering film matrix photocatalytic material precursor is obtained; the PVC calendering film matrix photocatalytic material precursor is hot-pressed on a hydraulic flat press at 190°C for 20 minutes to obtain a PVC calendering film matrix photocatalytic material.

[0087] Comparative Example 1

[0088] The components and their mass ratios used in preparing 100g of the product of the present invention are as follows:

[0089]

[0090] The general plastic is polyvinyl chloride.

[0091] The elastomer is nitrile rubber.

[0092] The composite plasticizer is a mixture of dibutyl phthalate and diethyl phthalate, with a mass ratio of 1:1.

[0093] The stabilizer is BS-105 rare earth composite heat stabilizer.

[0094] The photocatalytic filler is titanium dioxide with a particle size of 1.0 μm, a rutile TiO2 content of 98%, an oil absorption of 20 g / 100 g, and a water suspension pH of 8.

[0095] The manganese slag ultrafine powder is manganese slag that is ground into 1700 mesh by an ultrafine tire vertical mill (also known as "ultrafine roller milling"). The chemical composition (mass fraction) of the manganese slag is SiO2 (20.05%), Al2O3 (16.42%), CaO (37.62%), MgO (6.52%), SO3 (0.48%), Fe2O3 (1.23%), MnO (10.87%), TiO2 (0.42%) and others (6.39%).

[0096] General plastics, elastomers, composite plasticizers, stabilizers, photocatalytic fillers and manganese slag ultrafine powder are premixed in a high-speed mixer for 25 minutes; after mixing for 15 minutes in a two-roll mill with a front and rear roller temperature of 160°C and a roller distance of 1 mm, a PVC calendering film matrix photocatalytic material precursor is obtained; the PVC calendering film matrix photocatalytic material precursor is hot-pressed on a hydraulic flat press at 190°C for 20 minutes to obtain a PVC calendering film matrix photocatalytic material.

[0097] Comparative Example 2

[0098] The components and their mass ratios used in preparing 100g of the product of the present invention are as follows:

[0099]

[0100] The general plastic is polyvinyl chloride.

[0101] The elastomer is nitrile rubber.

[0102] The composite plasticizer is a mixture of dibutyl phthalate and diethyl phthalate, with a mass ratio of 1:1.

[0103] The stabilizer is BS-105 rare earth composite heat stabilizer.

[0104] The solid waste photocatalytic filler is TiO2 modified from electric furnace ash. The ash is ground to 2300 mesh using an ultrafine tire vertical mill (also known as an "ultrafine roller mill"). The ultrafine powder is then mixed with tetrabutyl titanate in a mass ratio of 1:26 and formed via a sol-gel method. The chemical composition (by mass fraction) of the ash is Fe3O4 (0.34%), FeO (8.91%), Fe / Fe2O3 (58.65%), SiO2 (2.06%), CaO (2.92%), MgO (1.38%), Al2O3 (0.56%), K (1.32%), Na (1.32%), C (1.14%), Zn (2.61%), and others (18.79%).

[0105] The steel slag ultrafine powder is steel slag ground into 1700 mesh by an ultrafine tire vertical mill (also known as "ultrafine roller grinding"). The main chemical components of the steel slag are CaO (46.78%), Fe2O3 (24.40%), SiO2 (11.06%), MgO (5.75%), MnO (2.19%), P2O5 (0.91%), Al2O3 (2.30%) and others (6.61%).

[0106] General plastics, elastomers, composite plasticizers, stabilizers, solid waste photocatalytic fillers and ultrafine steel slag powder are premixed in a high-speed mixer for 25 minutes; after mixing for 15 minutes in a two-roll mill with a front and rear roller temperature of 160°C and a roller distance of 1 mm, a PVC calendering film matrix photocatalytic material precursor is obtained; the PVC calendering film matrix photocatalytic material precursor is hot-pressed on a hydraulic flat press at 190°C for 20 minutes to obtain a PVC calendering film matrix photocatalytic material.

[0107] Comparative Example 3

[0108] The components and their mass ratios used in preparing 100g of the product of the present invention are as follows:

[0109]

[0110] The general plastic is polyvinyl chloride.

[0111] The elastomer is nitrile rubber.

[0112] The composite plasticizer is a mixture of dibutyl phthalate and diethyl phthalate, with a mass ratio of 1:1.

[0113] The stabilizer is BS-105 rare earth composite heat stabilizer.

[0114] The solid waste photocatalytic filler is TiO2 modified from electric furnace ash. The ash is ground to 2300 mesh using an ultrafine tire vertical mill (also known as an "ultrafine roller mill"). The ultrafine powder is then mixed with tetrabutyl titanate in a mass ratio of 1:26 and formed via a sol-gel method. The chemical composition (by mass fraction) of the ash is Fe3O4 (0.34%), FeO (8.91%), Fe / Fe2O3 (58.65%), SiO2 (2.06%), CaO (2.92%), MgO (1.38%), Al2O3 (0.56%), K (1.32%), Na (1.32%), C (1.14%), Zn (2.61%), and others (18.79%).

[0115] The steel slag ultrafine powder is steel slag ground into 1700 mesh by an ultrafine tire vertical mill (also known as "ultrafine roller grinding"). The main chemical components of the steel slag are CaO (46.86%), Fe2O3 (27.18%), SiO2 (10.75%), MgO (4.81%), MnO (2.32%), P2O5 (2.47%), Al2O3 (3.38%) and others (2.23%).

[0116] General plastics, elastomers, composite plasticizers, stabilizers, solid waste photocatalytic fillers and ultrafine steel slag powder are premixed in a high-speed mixer for 25 minutes; after mixing for 15 minutes in a two-roll mill with a front and rear roller temperature of 160°C and a roller distance of 1 mm, a PVC calendering film matrix photocatalytic material precursor is obtained; the PVC calendering film matrix photocatalytic material precursor is hot-pressed on a hydraulic flat press at 190°C for 20 minutes to obtain a PVC calendering film matrix photocatalytic material.

[0117] The performance testing process of the PVC calendered film matrix photocatalytic materials prepared in Examples 1 to 6 and Comparative Examples 1 to 3 is as follows:

[0118] Table 1. Properties of photocatalytic materials for PVC calendered film substrates

[0119]

Claims

1. A PVC calendered film matrix photocatalytic material, characterized in that: The raw materials of the PVC calendering film matrix photocatalytic material are as follows by weight percentage: General plastics 49%~60% Elastomer 10%~15% Composite plasticizer 7.5%~12.5% Stabilizer 5%~7% Solid waste photocatalytic filler 3%~5% Manganese slag ultrafine powder 12.5%~17.5%; The general plastic is polyvinyl chloride; The solid waste photocatalytic filler is prepared by grinding electric furnace ash to 2000-2500 mesh using an ultrafine tire vertical mill, preparing the electric furnace ash ultrafine powder with tetrabutyl titanate in a mass ratio of 1:20-1:30, partially dissolving Fe3O4, FeO, and Fe / Fe2O3 contained in the electric furnace ash using a hydrochloric acid solution, and then modifying TiO2 to prepare the solid waste photocatalytic filler using a sol-gel method; The manganese slag ultrafine powder is obtained by grinding the manganese slag into 1500-2000 meshes through an ultrafine tire vertical mill; The chemical composition and mass percentage of the electric furnace ash are: Fe3O40.34%, FeO 8.91%, Fe / Fe2O358.65%, SiO22.06%, CaO 2.92%, MgO 1.38%, Al2O30.56%, K 1.32%, Na 1.32%, C 1.14%, Zn2.61%, and others 18.79%; The chemical composition and mass percentage of the manganese slag are: SiO2 20.05%, Al2O3 16.42%, CaO 37.62%, MgO 6.52%, SO3 0.48%, Fe2O3 1.23%, MnO 10.87%, TiO2 0.42% and others 6.39%.

2. The PVC calendered film matrix photocatalytic material according to claim 1, characterized in that: The elastomer is nitrile rubber.

3. The PVC calendered film matrix photocatalytic material according to claim 1, characterized in that: The composite plasticizer is a mixture of dibutyl phthalate and diethyl phthalate, with a mass ratio of 3:1 to 1:

3.

4. A method for preparing a PVC calendered film matrix photocatalytic material as claimed in claim 1, characterized in that The steps include: General plastics, elastomers, composite plasticizers, stabilizers, solid waste photocatalytic fillers and manganese slag ultrafine powder are premixed in a high-speed mixer for 15 minutes to 30 minutes; after mixing in a two-roll open mill with a front and rear roller temperature of 150°C to 175°C and a roller distance of 1mm for 10 minutes to 20 minutes, a PVC calendering film matrix photocatalytic material precursor is obtained; the PVC calendering film matrix photocatalytic material precursor is hot-pressed on a hydraulic flat press at 180°C to 200°C for 15 minutes to 30 minutes to obtain a PVC calendering film matrix photocatalytic material.

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