A light-emitting polyvinyl butyral composition, and a method for preparing and using the same
By blending maleic anhydride-grafted POE copolymer and polymer microspheres into PVB film, the water vapor transmission rate and anti-aging properties of PVB film are improved, and it emits fluorescence under light. This solves the problems of high water vapor transmission rate and insufficient anti-aging properties of PVB film in building photovoltaic modules, and achieves a longer service life and better aesthetics.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- CHINA PETROLEUM & CHEMICAL CORP
- Filing Date
- 2023-11-15
- Publication Date
- 2026-07-31
AI Technical Summary
Existing PVB films have high water vapor permeability in building photovoltaic modules, which affects power generation efficiency. They also have insufficient anti-aging properties and cannot last as long as the building. Furthermore, traditional EVA films yellow, affecting aesthetics and system power generation.
By blending maleic anhydride-grafted POE copolymer with polymer microspheres, adding fumed silica and functional additives, the processing flowability and water vapor permeability of PVB are improved, and it emits fluorescence under light, with the fluorescence intensity and quantum yield being adjusted.
It achieves low water vapor permeability, good peel strength and anti-aging properties of PVB film, while also having fluorescent function, making it suitable for building-integrated photovoltaics and electronic light-emitting devices.
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Abstract
Description
Technical Field
[0001] This invention relates to the field of plastics processing, and more specifically, to a luminescent polyvinyl butyral composition, its preparation method, and its application. Background Technology
[0002] Safety glass is a special type of glass made by sandwiching a layer of polyvinyl butyral (PVB) film between two layers of ordinary glass. This PVB film possesses unique bonding properties, excellent low-temperature impact resistance, good flexibility, good light transmission, and excellent resistance to light, weathering, sound insulation, and UV protection. When subjected to strong external impacts, the PVB film absorbs the impact energy, preventing the glass from shattering and injuring people. Furthermore, safety glass with the added PVB film has high transparency, water resistance, and aging resistance, and can be used in environments as low as -60°C. It can also replace acrylic glass as a transparent material in other products. Multi-layer composites can be used to create military-grade bulletproof glass.
[0003] Currently, my country's total production capacity of polyvinyl butyral (PVB) resin is approximately 10,000 tons per year. However, the products are mainly low-viscosity resins, with a near-complete lack of high-viscosity PVB resins suitable for producing high-quality interlayer films for laminated safety glass. Interlayer films for safety glass production are almost entirely imported. From a broad market perspective, with my country's economic development and the increasing number of automobiles and high-rise buildings, the demand for high-viscosity PVB resins and interlayer films will increase accordingly. EVA is generally used as the encapsulant for ordinary photovoltaic modules. However, EVA has poor anti-aging properties, a lifespan of less than 50 years (not matching the building's lifespan), and its yellowing will affect the building's aesthetics and the system's power generation. PVB film, on the other hand, possesses characteristics such as transparency, heat resistance, cold resistance, moisture resistance, and high mechanical strength, and is already maturely applied in the manufacture of laminated glass for buildings. Domestic glass curtain wall standards also explicitly require the "application of PVB." Using PVB instead of EVA in BIPV photovoltaic modules can achieve a longer service life.
[0004] When PVB is used in curtain walls, automotive films, or building-integrated photovoltaic (BIPV) modules, it is closer to indoor environments and often has multiple functions, such as sound insulation, heat insulation, thermal insulation, and color options. This necessitates functional and customized treatment of the PVB film. PVB has poor moisture barrier properties; when used in glass curtain walls without frame protection, moisture penetration can easily reduce power generation efficiency and damage the batteries. Therefore, waterproofing treatment of the PVB film is required. Summary of the Invention
[0005] To address the aforementioned problems in the prior art, this invention proposes a luminescent polyvinyl butyral composition. Specifically, it relates to a luminescent polyvinyl butyral composition, its preparation method, and its applications.
[0006] The luminescent polyvinyl butyral composition of this invention mainly uses polyvinyl butyral as a matrix, blends maleic anhydride-grafted POE copolymer with polymer microspheres, and incorporates other functional additives to improve performance, particularly improving PVB processing flowability, reducing PVB water vapor permeability, reducing plasticizer dosage, while also achieving good peel strength. It can emit fluorescence when exposed to special light.
[0007] By employing polymerization-induced self-assembly, aggregated luminescent groups (phosphorescent groups) of copolymers such as maleic anhydride are introduced into polymer microspheres. These groups can generate fluorescence and phosphorescence through electronic transitions under light, producing red fluorescence. Furthermore, the fluorescence intensity and quantum yield of the microspheres can be adjusted within a certain range by optimizing the copolymer structure and composition, adjusting the chain segment length and aggregate size. The method and product provided by this invention have significant application potential in building-integrated photovoltaics (BIPV), electronic light-emitting devices, and other fields.
[0008] One objective of this invention is to provide a luminescent polyvinyl butyral composition, which may contain polyvinyl butyral (PVB), polymer microspheres, fumed silica, and maleic anhydride-grafted POE copolymer.
[0009] Preferably, the amount of polyvinyl butyral used is 100 parts by weight.
[0010] The amount of fumed silica used is 0.1 to 15 parts by weight, preferably 4 to 12 parts by weight.
[0011] The amount of the polymer microspheres used is 0.05-5 parts by weight, preferably 0.05-3 parts by weight;
[0012] The amount of the maleic anhydride-grafted POE copolymer used is 5-20 parts by weight, preferably 5-12 parts by weight.
[0013] in,
[0014] The melt flow index of the polyvinyl butyral can be 0.1–50 g / 10 min (190℃, 5 kg), specifically 0.1 g / 10 min, 0.2 g / 10 min, 0.3 g / 10 min, 0.5 g / 10 min, 0.7 g / 10 min, 0.8 g / 10 min, 0.9 g / 10 min, 1.0 g / 10 min, 2 g / 10 min, 3 g / 10 min, 4 g / 10 min, 5 g / 10 min, 7 g / 10 min, 8 g / 10 min, 9 g / 10 min, 10 g / 10 min, 11 g / 10 min. 12g / 10min, 16g / 10min, 18g / 10min, 20g / 10min, 22g / 10min, 24g / 10min, 26g / 10min, 28g / 10min, 30g / 10min, 32g / 10min, 34g / 10min, 35g / 10min, 36g / 10min, 38g / 10min, 40g / 10min, 42g / 10min, 45g / 10min, 48g / 10min, 50g / 10min or any value between the above values or a range of values between any two of the above values.
[0015] The number-average molecular weight of the polyvinyl butyral can be 3,000 to 150,000, and the molecular weight distribution width can be 2 to 4. Specifically, its number-average molecular weight can be 3,000, 3,500, 5,000, 6,000, 7,000, 7,500, 8,000, 8,500, 9,000, 10,000, 20,000, 30,000, 40,000, 50,000, 60,000, 70,000, 75,000, 80,000, 85,000, 90,000, 100,000, 110,000, 120,000, 130,000, 140,000, 150,000, or any value between the above values, or a range between any two of the above values.
[0016] The hydroxyl content of the polyvinyl butyral can be between 10 and 40 wt%, and the aldehyde content can be between 50 and 90 wt%.
[0017] The polyvinyl butyral may specifically include the following units: 9-40 wt%, preferably 12-30 wt%, of polyvinyl alcohol structural units; 50-90 wt%, preferably 64-85 wt%, of polyvinyl butyral structural units; and 0.5-10%, preferably 0.5-6 wt%, of polyvinyl acetate structural units.
[0018] Fumed silica is a hydrophobic material with good light transmission properties, thermal insulation properties, and excellent flowability. The surface area of the fumed silica can be 100-800 m².2 / g. For example, specific values can be 100, 120, 150, 160, 180, 200, 220, 250, 300, 400, 450, 500, 550, 600, 650, 700, 750, 800mg. 2 / g or any value between the above values, or a range between any two of the above values, for example, 100 to 300m 2 / g.
[0019] Preferably, based on 100 parts by weight of polyvinyl butyral, the amount of fumed silica can be 0.1 to 15 parts by weight, more preferably 4 to 12 parts by weight. Specifically, it can be 0.1, 0.5, 1.0, 1.5, 2.0, 2.5, 3.0, 3.5, 4.0, 4.5, 5.0, 6.0, 7.0, 8.0, 9.0, 10, 11, 12, 13, 14, or 15 parts by weight, or any value between the above values, or a range between any two of the above values, for example, a range of 4 to 9.
[0020] The polymer microspheres can be prepared according to the preparation method of Chinese Patent CN112759716A (application number 201911058004.4, subject matter: a polymeric fluorescent material and its preparation method and fluorescent product). The entire contents of Chinese Patent CN112759716A (application number 201911058004.4, subject matter: a polymeric fluorescent material and its preparation method and fluorescent product) are incorporated herein by reference.
[0021] The polymer microspheres are specifically core-shell structured polymer microspheres, which may include a shell containing a first polymeric segment and a core containing a second polymeric segment; wherein: the first polymeric segment contains structural units derived from a first polymeric monomer; the first polymeric monomer is selected from at least one of styrene monomers, acrylate monomers, vinyl carboxylate monomers, acrylamide, methacrylamide, vinylpyridine, vinylpyrrolidone, vinyl caprolactam, and vinyl ether monomers; the second polymeric segment contains structural units derived from vinyl carboxylate monomers and the second polymeric monomer; the second polymeric monomer includes at least one of maleic anhydride, itaconic anhydride, and maleimide;
[0022] The average particle size of the polymer microspheres can be 10-1500 nm, preferably 20-1000 nm.
[0023] Preferably,
[0024] Based on 100 parts by weight of polyvinyl butyral, the amount of polymer microspheres can be 0.05 to 5 parts by weight, preferably 0.05 to 3 parts by weight, and more preferably 0.05 to 0.5 parts by weight. For example, it can be 0.05, 0.06, 0.08, 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, 1.0, 1.5, 2.0, 2.5, 3.0, 3.5, 4.0, 4.5, 5.0, or any value between the above values or a range between any two of the above values, such as a range of 0.1 to 1.
[0025] The maleic anhydride-grafted POE copolymer can serve as a bridge to improve the adhesion and compatibility between polar and non-polar materials. It can also be used as a toughening agent.
[0026] Specifically, based on 100 parts by weight of the polyvinyl butyral, the amount of the maleic anhydride-grafted POE copolymer can be 5-20 parts by weight, preferably 5-12 parts by weight. For example, it can be 5, 6, 7, 8, 9, 10, 12, 14, 18, 20, or any value between these values, or a range between any two of these values. For example, a range of 6-15.
[0027] Specifically, the luminescent polyvinyl butyral composition may also contain a plasticizer;
[0028] The plasticizer may be selected from at least one of small molecule esters, sulfonamides, diols / polyethers, and polybutenes;
[0029] Specifically, the plasticizer may be selected from at least one of dicarboxylic or tricarboxylic acids, adipate esters, maleate esters, benzoate esters, epoxy vegetable oils or sulfonamides, phosphate esters, polyol esters, polyethers, polybutenes, ethyl acetocyanate, citrate, or diisononyl cyclohexane-1,2-dicarboxylic acid.
[0030] Wherein, the dicarboxylic or tricarboxylic acid class is preferably trimellitic ester, more preferably at least one of trimethyl trimellitate, tri(2-ethylhexyl) trimellitate, decyl octyl trimellitate, nonylhexyl trimellitate, and trioctyl trimellitate; and / or,
[0031] The adipate esters may be selected from at least one of di(2-ethylhexyl) adipate, dimethyl adipate, monomethyl adipate, dibutoxyethyl adipate, dioctyl adipate, and sebacic acid esters; and / or,
[0032] The maleate esters are selected from at least one of dibutyl maleate and diisobutyl maleate;
[0033] The epoxy vegetable oil or sulfonamide is preferably selected from at least one of N-ethyl-p-toluenesulfonamide, N-(2-hydroxypropyl)benzenesulfonamide, and N-butylbenzenesulfonamide;
[0034] The phosphate esters are selected from at least one of tricresyl phosphate (TCP) and tributyl phosphate (TBP);
[0035] The polyol esters mentioned are selected from at least one of di(2-ethylbutyric acid) triethylene glycol ester (3GH), 3G0 (triethylene glycol diisooctanoate), triethylene glycol diisooctanoate, and 4G7 (tetraethylene diheptanate).
[0036] Preferably,
[0037] Based on 100 parts by weight of polyvinyl butyral, the amount of plasticizer can be 10 to 40 parts by weight, preferably 10 to 25 parts by weight. Specifically, it can be 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 30, 32, 36, 38, or 40 parts by weight, or any value between these values, or a range between any two of these values, such as 15 to 22.
[0038] The luminescent polyvinyl butyral composition may also include other additives as needed, such as light stabilizers and antioxidants. In the technical solution of this application, the light stabilizer may include at least one of ultraviolet absorbers and hindered amine stabilizers. The former absorbs ultraviolet light in the spectrum, while the latter captures free radicals before the degradation reaction, thus preventing degradation. Adding a light stabilizer can improve the anti-aging properties of the film and maintain good mechanical properties.
[0039] Various additives can be added according to actual needs. The specific dosage is the conventional dosage and can be adjusted according to the actual situation.
[0040] Specifically,
[0041] The luminescent polyvinyl butyral composition may further include a UV absorber; the UV absorber may be selected from those commonly used in the art, such as at least one selected from o-hydroxybenzophenones, benzotriazoles, salicylates, triazines, substituted acrylonitriles, triazine-piperidine condensates, etc. Specifically, the UV absorber may be selected from commercially available products commonly used in the art, such as UV absorber LA-31RG. Preferably, based on 100 parts by weight of polyvinyl butyral, the amount of UV absorber may be 0.1 to 3 parts by weight.
[0042] The luminescent polyvinyl butyral composition may also contain a hindered amine stabilizer;
[0043] The hindered amine stabilizer can be a conventional type, such as a derivative of 2,2,6,6-tetramethylpiperidine. Specifically, commonly used hindered amine stabilizer products in the art can be used, such as hindered amine stabilizer LA-63P and other general products in the art. Preferably, based on 100 parts by weight of polyvinyl butyral, the amount of hindered amine stabilizer can be 0.1 to 3 parts by weight.
[0044] The luminescent polyvinyl butyral composition may also contain antioxidants;
[0045] Preferably, based on 100 parts by weight of polyvinyl butyral, the amount of antioxidant can be 0.1 to 3 parts by weight;
[0046] The antioxidant may be one or a combination of two or more of the following: 3,9-bis[1,1-dimethyl-2-(3-tert-butyl-4-hydroxy-5-methylphenyl)propionyloxy[ethyl]2,4,8,10-tetraoxaspiro[5,5]undecane, bis(2,6-di-tert-butyl-4-methylphenyl)pentaerythritol diphosphate, methylene bis-phenyltriazolyltetramethylbutylphenol, 1,2,3,4-butanetetracarboxylic acid, and 1,2,2,6,6-pentamethyl-4-piperidinyl ester of a polymer of 2,2-bis(hydroxymethyl)-1,3-propanediol and 3-hydroxy-2,2-dimethylpropionaldehyde.
[0047] In practical applications, this invention can employ hindered phenolic antioxidants and phosphite antioxidants as a composite antioxidant, wherein the weight ratio of the hindered phenolic antioxidants to the phosphite antioxidants can be 2:1 to 1:2, preferably 1:1 to 2:1, which can improve the effect of preventing thermal decomposition. Hindered amine stabilizers and ultraviolet absorbers can also be used, with a weight ratio between 3:1 and 1:3, which not only improves UV resistance but also provides protection for the photovoltaic backsheet.
[0048] Preferably, based on 100 parts by weight of the polyvinyl butyral, the total amount of the other additives can be 0.1 to 5 parts by weight, preferably 0.2 to 3 parts by weight. For example, it can be 0.1, 0.5, 1.0, 1.2, 1.5, 1.8, 2.0, 2.2, 2.5, 2.8, 3.0, 3.5, 4.0, 4.5, 5.0 parts by weight, or any value between the above values, or a range between any two of the above values.
[0049] A second objective of this invention is to provide a method for preparing the luminescent polyvinyl butyral composition described in one objective of this invention, which may include the following steps:
[0050] The components, including polymer microspheres, fumed silica, and optional plasticizer, are added to polyvinyl butyral, and then maleic anhydride-grafted POE copolymer is added and blended to obtain the final product.
[0051] Specifically, this may include the following steps:
[0052] The components, including polymer microspheres and fumed silica, are dissolved in a plasticizer and stirred until homogeneous. This solution is then added to polyvinyl butyral (specifically, this solution can be added in batches, in small amounts each time, while stirring continuously to prevent agglomeration). After the plasticizer is fully absorbed by the polyvinyl butyral, the blend becomes fluffy. At this point, maleic anhydride-grafted POE copolymer is added and mixed evenly. The mixture is then cast into a casting machine feed inlet. Preferably, the temperature of the feed section should not exceed 120°C, and the temperatures of other sections should not exceed 170°C. The resulting material thickness can be 0.2–0.8 mm.
[0053] The third objective of this invention is to provide a luminescent polyvinyl butyral composition prepared by the preparation method described in the second objective of this invention.
[0054] The fourth objective of this invention is to provide the application of the luminescent polyvinyl butyral composition described in the first or third objective of this invention, or the preparation method described in the second objective of this invention, preferably in the application of laminated glass, solar cell module encapsulation, and building-integrated photovoltaics. Detailed Implementation
[0055] The present invention will now be described in detail with reference to specific embodiments. It should be noted that the following embodiments are only used to further illustrate the present invention and should not be construed as limiting the scope of protection of the present invention. Some non-essential improvements and adjustments made by those skilled in the art based on the content of the present invention are still within the scope of protection of the present invention.
[0056] The endpoints and any values of the ranges disclosed herein are not limited to the precise ranges or values, and these ranges or values should be understood to include values close to these ranges or values. For numerical ranges, the endpoint values of the various ranges, the endpoint values of the various ranges and individual point values, and individual point values can be combined with each other to obtain one or more new numerical ranges, which should be considered as specifically disclosed herein.
[0057] Source of raw materials
[0058] Unless otherwise specified, the raw materials used in the examples and comparative examples are all disclosed in the prior art, such as those that can be directly purchased or prepared according to the preparation methods disclosed in the prior art.
[0059] Polyvinyl butyral, B60HH, Kuraray Corporation, Japan; melt index 3.6 g / 10 min (190℃, 5 kg), number average molecular weight 55857, molecular weight distribution width 2.4; hydroxyl content 20.5 wt%, aldehyde content 77.0 wt%.
[0060] Hydrophobic fumed silica with a specific surface area of 130 m² 2 / g, R 972, Evonik Inc.
[0061] Maleic anhydride-grafted POE copolymer, produced by Jia Yi Rong Company.
[0062] Triethylene glycol diisooctanoate, PROVIPLAST 1783, Zhejiang Puweilun Chemical Co., Ltd.;
[0063] Dibutoxyethyl adipic acid, PROVIPLAST 0142, Zhejiang Puweilun Chemical Co., Ltd.;
[0064] Mix 1783 and 0142 at a mass ratio of 3:1, and denote this mixture as Additive Pack A;
[0065] Hindered phenolic antioxidant AO-80, ADEKA Corporation (Japan);
[0066] PEP-36, an antioxidant of phosphites, manufactured by ADEKA Corporation (Japan);
[0067] LA-31RG, a UV absorber, manufactured by ADEKA Corporation (Japan);
[0068] Hindered amine stabilizer LA-63P, ADEKA Corporation (Japan);
[0069] The mass ratio of the above four adjuvants—antioxidant AO-80, antioxidant PEP-36, UV absorber LA-31RG, and hindered amine stabilizer LA-63P—is 0.3:0.3:0.3:0.4, respectively. They are combined and mixed together as adjuvant package B.
[0070] Preparation of polymer microspheres
[0071] The polymer microspheres C were prepared using the RAFT polymerization method in Example 1 of CN112759716A (application number 201911058004.4, subject name: a polymer fluorescent material and its preparation method and its fluorescent product) for later use.
[0072] Examples 1-3 and Comparative Examples 1-3: Preparation of Polyvinyl Butyral Compositions
[0073] The mixture consists of 100 parts by weight of polyvinyl butyral, 0.1–15 parts by weight of fumed silica, 0.05–5 parts by weight of polymer microspheres C, 5–20 parts by weight of POE-maleic anhydride graft copolymer, 10–40 parts by weight of plasticizer, and 0.5–3 parts by weight of other additives. The polymer microspheres and fumed silica are dispersed in the plasticizer and stirred until homogeneous. The plasticizer / microsphere / fumed silica mixture is added to the polyvinyl butyral in batches while stirring continuously to prevent agglomeration. After the plasticizer is fully absorbed, the blend becomes fluffy. At this point, the POE-maleic anhydride graft copolymer is added and mixed thoroughly. The mixture is then added to the inlet of the casting machine, controlling the temperature of the inlet section to not exceed 120°C. The temperatures of other sections should not exceed 170°C. The thickness is approximately 400 μm.
[0074] The formula is shown in Table 1. The units in the table are parts by mass. PVB is 100 parts by mass.
[0075] Table 1
[0076]
[0077] Product physical performance testing
[0078] The films prepared in Examples 1-3 and Comparative Examples 1-3 were used to prepare samples according to the "JC T 449-2014 Standard for Photovoltaic PVB Films in the Building Industry" and their performance was tested. Fluorescence performance was also tested (excitation spectrum, emission spectrum, and afterglow decay curve were measured using a Shimadzu RF-5301PC fluorescence spectrophotometer). The excitation light was 365nm ultraviolet light. The test results are shown in Table 2 below.
[0079] Table 2
[0080]
[0081] Compared with Comparative Examples 1-3, the PVB materials in Examples 1-3 exhibit certain fluorescence after the addition of plasticizer and polymer microspheres alone, while maintaining a relatively high water vapor transmission rate. Examples 1-3 demonstrate that the embodiments of this application, by adding maleic anhydride-grafted POE copolymer and reducing the amount of plasticizer, can achieve the desired mechanical properties while significantly reducing water vapor transmission rate and still maintaining fluorescence properties.
[0082] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.
Claims
1. A luminescent polyvinyl butyral composition comprising polyvinyl butyral, polymer microspheres, fumed silica, and maleic anhydride-grafted POE copolymer; Based on a weight of 100 parts by weight of the aforementioned polyvinyl butyral, The amount of fumed silica used is 0.1 to 15 parts by weight. The amount of the polymer microspheres used is 0.05 to 5 parts by weight; The amount of the maleic anhydride-grafted POE copolymer used is 5 to 20 parts by weight; The polymer microspheres are core-shell structured polymer microspheres, comprising a shell containing a first polymeric segment and a core containing a second polymeric segment; wherein: The first polymeric segment contains structural units derived from the first polymeric monomer; the first polymeric monomer is selected from at least one of styrene monomers, acrylate monomers, vinyl carboxylate monomers, acrylamide, methacrylamide, vinylpyridine, vinylpyrrolidone, vinyl caprolactam, and vinyl ether monomers; the second polymeric segment contains structural units derived from vinyl carboxylate monomers and the second polymeric monomer; the second polymeric monomer includes at least one of maleic anhydride, itaconic anhydride, and maleimide.
2. The luminescent polyvinyl butyral composition according to claim 1, characterized in that: Based on a weight of 100 parts by weight of the aforementioned polyvinyl butyral, The amount of fumed silica used is 4 to 12 parts by weight. The amount of the polymer microspheres used is 0.05 to 3 parts by weight; The amount of the maleic anhydride-grafted POE copolymer used is 5 to 12 parts by weight.
3. The luminescent polyvinyl butyral composition according to claim 1, characterized in that: Under test conditions of 190℃ and 5kg load, the melt flow index of the polyvinyl butyral is 0.1~50g / 10min.
4. The luminescent polyvinyl butyral composition according to claim 3, characterized in that: The polyvinyl butyral has a number-average molecular weight of 3,000 to 150,000 and a molecular weight distribution width of 2 to 4.
5. The luminescent polyvinyl butyral composition according to claim 1, characterized in that: The specific surface area of the fumed silica is 100-800 m². 2 / g.
6. The luminescent polyvinyl butyral composition according to claim 1, characterized in that: The average particle size of the polymer microspheres is 10–1500 nm.
7. The luminescent polyvinyl butyral composition according to claim 6, characterized in that: The average particle size of the polymer microspheres is 20–1000 nm.
8. The luminescent polyvinyl butyral composition according to claim 1, characterized in that... It also contains plasticizers; The plasticizer is selected from at least one of small molecule esters, sulfonamides, polybutenes, and epoxidized vegetable oils.
9. The luminescent polyvinyl butyral composition according to claim 8, characterized in that: The plasticizer is selected from at least one of trimellitates, adipates, maleates, benzoates, phosphate esters, polyol esters, citrates, diisononyl cyclohexane-1,2-dicarboxylate, sulfonamides, polybutenes, and epoxidized vegetable oils.
10. The luminescent polyvinyl butyral composition according to claim 9, characterized in that: The trimellitic esters are selected from at least one of trimethyl trimellitate, tris(2-ethylhexyl) trimellitate, decyl octyl trimellitate, nonylhexyl trimellitate, and trioctyl trimellitate; and / or The adipate esters are selected from at least one of di(2-ethylhexyl) adipate, dimethyl adipate, monomethyl adipate, dibutoxyethyl adipate, dioctyl adipate, and sebacic acid esters; and / or, The maleic esters are selected from at least one of dibutyl maleate and diisobutyl maleate.
11. The luminescent polyvinyl butyral composition according to claim 9, characterized in that: The sulfonamides are selected from at least one of N-ethyl-p-toluenesulfonamide, N-(2-hydroxypropyl)benzenesulfonamide, and N-butylbenzenesulfonamide; The phosphate esters are selected from at least one of tricresyl phosphate and tributyl phosphate; The polyol esters mentioned are selected from at least one of di(2-ethylbutyric acid) triethylene glycol ester, triethylene glycol diisooctanoate, tetraethylene diheptanate, and ethyl acetocyanate.
12. The luminescent polyvinyl butyral composition according to claim 8, characterized in that: Based on a weight of 100 parts by weight of the aforementioned polyvinyl butyral, The amount of plasticizer used is 10 to 40 parts by weight.
13. The luminescent polyvinyl butyral composition according to claim 12, characterized in that: Based on a weight of 100 parts by weight of the aforementioned polyvinyl butyral, The amount of plasticizer used is 10 to 25 parts by weight.
14. A method for preparing the luminescent polyvinyl butyral composition according to any one of claims 1 to 13, characterized in that... Includes the following steps: The components, including polymer microspheres, fumed silica, and plasticizer, are added to polyvinyl butyral, and then maleic anhydride-grafted POE copolymer is added and blended to obtain the final product.
15. The method for preparing the luminescent polyvinyl butyral composition according to claim 14, characterized in that... Includes the following steps: The components, including polymer microspheres and fumed silica, are dissolved in a plasticizer and then added to polyvinyl butyral. After the plasticizer is absorbed by polyvinyl butyral, maleic anhydride-grafted POE copolymer is added, mixed evenly, and the mixture is cast to obtain the final product.
16. The method for preparing the luminescent polyvinyl butyral composition according to claim 15, characterized in that: The temperature of the feeding section should not exceed 120℃; the temperature of other sections should not exceed 170℃.
17. A luminescent polyvinyl butyral composition prepared by the method of preparing a luminescent polyvinyl butyral composition according to any one of claims 14 to 16.
18. The use of a luminescent polyvinyl butyral composition according to any one of claims 1-13, 17 or the preparation method according to any one of claims 14-16.
19. The application according to claim 18, characterized in that... Selected from applications in building-integrated photovoltaics, solar cell modules, laminated glass, and electronic light-emitting devices.