A method for preparing a BIPV module containing a bio-based adhesive film

Abstract

The present invention discloses a method for preparing a BIPV component containing a bio-based adhesive film, relates to the technical field of adhesive films, and includes the preparation of a BIPV component of a bio-based adhesive film, wherein the steps for preparing the BIPV component of the bio-based adhesive film are as follows: material preparation: preparing polylactic acid as a bio-based material, an ethanol solvent, and an additive; solution preparation; blending modification; adding an antioxidant; adding an ultraviolet absorber; stirring and mixing; drying; laying: laying in the order of glass panel-adhesive film-cell-adhesive film-backboard from top to bottom, and then hot pressing at a high temperature of 150°C, and then preparing a BIPV component containing a bio-based adhesive film through cutting and wiring; quality inspection. The present invention realizes the efficient utilization of renewable resources, promotes the development of sustainable energy, improves the overall weather resistance and adaptability of the component, and enables better response to different environmental conditions by designing the preparation of a BIPV component with a bio-based adhesive film.

Description

Technical Field

[0001] The present invention relates to the field of adhesive film technology, and in particular to a method for preparing a BIPV component containing a bio-based adhesive film. Background Art

[0002] With the increase of global population and economic development, the demand for energy is increasing. Photovoltaic power generation is a technology that uses solar energy to directly convert light energy into electrical energy. Generally speaking, photovoltaic tiles are composed of glass, film cells and back panels. Traditional films are subject to aging, yellowing, embrittlement and other phenomena, which affect the service life. Traditional photovoltaic tiles often deform due to thermal expansion and contraction, resulting in damage to the photovoltaic tiles. The preparation of BIPV modules containing bio-based films can provide certain strength and toughness, can be naturally degraded, reduce the difficulty of waste treatment, and can maintain good performance in harsh environments, which is environmentally friendly.

[0003] Therefore, it is very necessary for the present application to propose a method for preparing a BIPV component containing a bio-based adhesive film to solve the problems existing in the prior art.

[0004] 1. Patent document CN115528125B discloses a BIPV lightweight component and its preparation method. The above patent realizes the stacking of metal foil strips, encapsulation film strips, transparent backplane, back encapsulation film, battery layer, front encapsulation film, and front film from bottom to top, and the lamination is integrated into one piece by a laminator; the battery layer includes a plurality of solar cell strings, and the metal foil strips and encapsulation film strips overlap and are placed in a direction perpendicular to the connection direction of the solar cell string welding strips and directly below the edge of the transparent backplane. This application uses metal foil strips to stick on the backplane to solve the problems of welding strip reliability, installation reliability, and water tightness of existing components, but the above patent cannot realize the functions of weather resistance and environmental protection of the bio-based film.

[0005] 2. Patent document CN114103455B discloses a photovoltaic module and a method for preparing the same. The above patent achieves 1) roughening the surface of the glass substrate to obtain a rough layer; 2) after cleaning the rough layer, printing a transparent ink layer on the surface of the rough layer by UV inkjet; 3) printing a color ink layer on the surface of the transparent ink layer by UV inkjet, wherein the color ink layer includes transparent ink and color ink. The present invention uses UV inkjet printing technology to prepare a BIPV photovoltaic module with higher light transmittance and bonding strength, solving the problem of applying UV inkjet printing technology in the BIPV field, but the above patent cannot achieve the function of enhancing the environmental adaptability and degradability of the bio-based adhesive film.

[0006] 3. Patent document CN116948410B discloses a composite material for encapsulating photovoltaic modules and a preparation method thereof. The above patent realizes the use of random copolymers containing acrylates to modify epoxy resins, which not only improves the heat resistance of the random copolymers themselves, but also improves the light transmittance of the epoxy resin. The prepared composite material not only meets the requirements of high light transmittance and high heat resistance, but also takes into account flame retardant properties. It can replace the tempered glass in the double-glass module and be directly used in BIPV building materials. However, the above patent cannot achieve the function of reducing the oxidation and aging of the bio-based adhesive film during use.

[0007] 4. Patent document CN116855191B discloses a high-impact resistant adhesive film and a method for preparing the same. The above patent achieves this by introducing shear thickening into EVA / POE, so that the product can consume some extra energy when impacted, and can also ensure that the body is not damaged by improving the strength of the material itself, thereby improving the impact resistance of the adhesive film and even the entire component, so that the component can be used in mobile vehicles, BIPV and other application scenarios with impact resistance and shock absorption requirements. However, the above patent cannot reduce the performance degradation of the bio-based adhesive film caused by ultraviolet rays.

[0008] In summary, the above patents cannot achieve the functions of weather resistance and environmental protection of bio-based adhesive films, enhance the environmental adaptability and degradability of bio-based adhesive films, reduce the oxidation and aging of bio-based adhesive films during use, and reduce the performance degradation of bio-based adhesive films caused by ultraviolet rays, resulting in the problem that BIPV modules of bio-based adhesive films are damaged by the environment during use, causing poor performance.

[0009] To this end, the present application proposes a method for preparing a BIPV component containing a bio-based film, which can realize the functions of making the bio-based film weather-resistant and environmentally friendly, enhance the environmental adaptability and degradability of the bio-based film, reduce the oxidative aging of the bio-based film during use, and reduce the performance degradation of the bio-based film caused by ultraviolet rays. Summary of the invention

[0010] The purpose of the present invention is to provide a method for preparing a BIPV module containing a bio-based adhesive film, so as to solve the technical problem proposed in the above background technology that the bio-based adhesive film cannot have the functions of weather resistance and environmental protection, enhance the environmental adaptability and degradability of the bio-based adhesive film, reduce the oxidation and aging of the bio-based adhesive film during use, and reduce the performance degradation of the bio-based adhesive film caused by ultraviolet rays, resulting in the BIPV modules of the bio-based adhesive film being damaged by the environment during use and causing poor performance.

[0011] To achieve the above object, the present invention provides the following technical solution: a method for preparing a BIPV module containing a bio-based adhesive film, comprising preparing a BIPV module containing a bio-based adhesive film, wherein the steps for preparing the BIPV module containing a bio-based adhesive film are as follows:

[0012] Material preparation: prepare polylactic acid as bio-based material, ethanol solvent, and additives;

[0013] Solution preparation: dissolving polylactic acid in ethanol solvent to form a uniform solution;

[0014] Blending modification: blending with polyethylene;

[0015] Adding antioxidants: gradually adding tea polyphenol powder into the polylactic acid solution;

[0016] Adding UV absorber: gradually adding UV-531 into the mixed solution of polylactic acid and tea polyphenols;

[0017] Stirring and mixing: using a stirrer to fully mix the mixed solution of polylactic acid, tea polyphenol powder and UV-531 to form a bio-based film mixed solution;

[0018] Drying: drying the mixed solution of the bio-based adhesive film at room temperature to solidify the bio-based adhesive film;

[0019] Laying: Laying in the order of glass panel-bio-based adhesive film-cell-bio-based adhesive film-back panel from top to bottom, and then hot pressing at a high temperature of 150°C, and then cutting and wiring to prepare BIPV modules containing bio-based adhesive film;

[0020] Quality inspection: Conduct quality inspection on the manufactured BIPV modules containing bio-based adhesive films.

[0021] Preferably, the preparation of polylactic acid in the material preparation comprises the following steps:

[0022] Lactic acid preparation: Lactic acid is produced by fermenting sugarcane juice with lactic acid bacteria;

[0023] Dehydration cyclization: Lactic acid is dehydrated and cyclized at 1000Pa and 130°C to generate lactide;

[0024] Lactide alcoholization: distillation, crystallization and alcoholization of the generated lactide;

[0025] Ring-opening polymerization: Add the alcoholized lactide into a polymerization reactor, and add stannous octoate to cause the lactide to undergo ring-opening polymerization to form polylactic acid.

[0026] Preferably, the preparation of the antioxidant tea polyphenol powder comprises the following steps:

[0027] Crushing tea leaves: Prepare green tea leaves and crush them into granules;

[0028] Ethanol extraction: add ethanol to tea granules at a ratio of 1g:10ml, and extract by shaking;

[0029] Separating the supernatant: filtering the extract to separate the supernatant;

[0030] Concentration and drying: The supernatant is dried and concentrated to obtain an extract;

[0031] Extraction: Add water to the extract at a solid-liquid ratio of 1g:10ml and stir evenly, then add hemp oil at a volume ratio of 1:2, shake and extract 3 times, and collect the aqueous extract;

[0032] Column elution: adjust the pH value of the aqueous phase extract to 4, then load it onto a polyamide resin column, first wash the column with water to remove impurities, then wash the column with 70% by volume ethanol, and collect the ethanol eluate;

[0033] Recovering ethanol: Recovering ethanol from the ethanol eluate under reduced pressure to concentrate tea polyphenols;

[0034] Drying: Dry the concentrated tea polyphenols to obtain tea polyphenol powder.

[0035] Preferably, the preparation of the ultraviolet absorber UV-531 comprises the following steps:

[0036] Reaction apparatus: The reaction was carried out in a three-necked flask equipped with a stirrer and a condenser reflux tube;

[0037] Raw material addition: Add resorcinol, octanol, distilled water and zinc chloride, stir to dissolve the resorcinol;

[0038] Cooling: Cool the system to 3°C with chilled brine;

[0039] Add reactants dropwise: slowly add trichloromethylbenzene dropwise while keeping the system temperature at 5°C;

[0040] Temperature reaction: gradually increase the system temperature to 60°C at a rate of 1°C per minute;

[0041] Reflux: Raise the reaction temperature to 120°C and reflux for 2.5 hours;

[0042] Product treatment: The product is washed, post-treated and refined to obtain UV-531.

[0043] Preferably, the preparation of the polyethylene comprises the following steps:

[0044] Raw material preparation: prepare ethylene monomer;

[0045] Feed: Ethylene monomer is fed into the reactor;

[0046] Initiation reaction: Add initiator to initiate polymerization reaction, and carry out polymerization under high temperature 200°C and high pressure 150MPa;

[0047] Discharging: After the reaction is completed, the product polyethylene is discharged from the reactor;

[0048] Subsequent processing: further treatment and processing of the product.

[0049] Preferably, the steps of lactide alcoholization are as follows:

[0050] Prepare raw materials: put the prepared lactide into a reaction container and prepare ethanol solvent;

[0051] Dissolving lactide: Add ethanol solvent into the reaction vessel and stir to fully dissolve the lactide;

[0052] Alcoholization reaction: Lactide undergoes an alcoholization reaction with ethanol solvent to form an alcoholized lactide product;

[0053] Product separation: Separate the alcoholized lactide product from the ethanol solvent by filtration, precipitation and distillation;

[0054] Purification: The lactide product is purified to obtain high-purity lactide.

[0055] Preferably, the steps of eluting on the column are as follows:

[0056] Pretreatment: Perform appropriate pretreatment according to the type and properties of the column;

[0057] Loading: Wait for the separated mixture to be loaded onto the chromatographic column and introduce the aqueous extract by injection;

[0058] Elution: Wash the column with 70% ethanol to separate the aqueous extract;

[0059] Collecting the eluate: During the elution process, collecting the ethanol eluate, the eluate contains the separated components;

[0060] Detection and analysis: The collected eluate is detected and analyzed to determine the presence and concentration of components.

[0061] Preferably, the product processing in the preparation of UV-531 comprises the following steps:

[0062] Washing: Turn on the circulating water pump, adjust the vacuum degree to 0.092MPa, absorb the excess HCI with circulating water, then cool the reaction system to 70℃, transfer the reaction intermediate product into a separatory funnel, wash twice with water, and separate the water phase;

[0063] Post-treatment: the reaction intermediate product was transferred back into the reaction bottle, and catalysts KI and PA were added, and the reaction was carried out at 110°C and 0.092MPa for 4 hours. After the reaction was completed, the system temperature was cooled to 70°C, washed twice with 70°C water, the water phase was separated, and the remaining n-octanol was removed at a vacuum degree of 0.1MPa to obtain a crude product;

[0064] Refining: Wash with ethanol three times, remove the ethanol, and dry the crystals to obtain the finished product.

[0065] Preferably, the basic principle of ring-opening polymerization in the preparation of the polylactic acid is to utilize the cyclohexyl ester group of the lactide molecule to undergo a ring-opening reaction under the action of a catalyst, stannous octoate, to generate an intermediate, and then generate polylactic acid through a condensation reaction.

[0066] Preferably, the BIPV module containing the bio-based adhesive film comprises: a glass panel, a battery cell, a backplane, 70% polylactic acid, 10% polyethylene, 10% tea polyphenols powder and 10% UV-531, which are laid in the order of glass panel-adhesive film-battery cell-adhesive film-backplane from top to bottom, and then hot-pressed at a high temperature of 150°C, and then cut and wired to prepare the BIPV module containing the bio-based adhesive film.

[0067] Compared with the prior art, the present invention has the following beneficial effects:

[0068] 1. The present invention achieves better integration of the bio-based adhesive film and the components by designing the preparation of the bio-based adhesive film, thereby improving the overall stability and environmental tolerance, solving the problem of potential environmental pollution caused by the bio-based adhesive film, and promoting the further development of BIPV technology;

[0069] 2. The present invention achieves the enhancement of the environmental adaptability and degradability of the bio-based adhesive film by designing the preparation of polylactic acid, solves the problem of difficult degradation of the bio-based adhesive film, reduces environmental pressure, and improves the environmental protection level of the bio-based adhesive film and the overall sustainability of the BIPV module;

[0070] 3. The present invention enhances the antioxidant function of the bio-based adhesive film by designing the preparation of tea polyphenol powder, solves the problem of damage caused by oxidation and aging of the bio-based adhesive film during use, and improves the stability of the bio-based adhesive film and the durability of the BIPV module in outdoor environments;

[0071] 4. The present invention improves the anti-ultraviolet performance of the bio-based adhesive film by designing a preparation with UV-531, so that the bio-based adhesive film can better cope with the lighting environment, solves the problem that the bio-based adhesive film is easily damaged by ultraviolet rays, and improves the stability of the bio-based adhesive film in an ultraviolet environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0072] Figure 1 Schematic diagram of the preparation process of the BIPV component of the bio-based adhesive film of the present invention;

[0073] Figure 2 This is a schematic diagram of the preparation process of polylactic acid of the present invention;

[0074] Figure 3 This is a schematic diagram of the preparation process of the tea polyphenols powder of the present invention;

[0075] Figure 4 This is a schematic diagram of the preparation process of UV-531 of the present invention;

[0076] Figure 5 It is a schematic diagram of the polyethylene preparation process of the present invention. DETAILED DESCRIPTION

[0077] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0078] Example 1

[0079] See also Figure 1 The present invention provides an embodiment: a method for preparing a BIPV module containing a bio-based adhesive film, including preparing the BIPV module of the bio-based adhesive film, wherein the steps for preparing the BIPV module of the bio-based adhesive film are as follows:

[0080] Material preparation: prepare polylactic acid as bio-based material, ethanol solvent, and additives;

[0081] Solution preparation: dissolving polylactic acid in ethanol solvent to form a uniform solution;

[0082] Blending modification: blending with polyethylene;

[0083] Adding antioxidants: gradually adding tea polyphenol powder into the polylactic acid solution;

[0084] Adding UV absorber: gradually adding UV-531 into the mixed solution of polylactic acid and tea polyphenols;

[0085] Stirring and mixing: using a stirrer to fully mix the mixed solution of polylactic acid, tea polyphenol powder and UV-531 to form a bio-based film mixed solution;

[0086] Drying: drying the mixed solution of the bio-based adhesive film at room temperature to solidify the bio-based adhesive film;

[0087] Laying: Laying in the order of glass panel-bio-based adhesive film-cell-bio-based adhesive film-back panel from top to bottom, and then hot pressing at a high temperature of 150°C, and then cutting and wiring to prepare BIPV modules containing bio-based adhesive film;

[0088] Quality inspection: Conduct quality inspection on the manufactured BIPV modules containing bio-based adhesive films;

[0089] Further, polylactic acid is prepared as a bio-based material, the polylactic acid is dissolved in an ethanol solvent to form a uniform solution, polyethylene is added to blend with the polylactic acid to improve the performance of the polylactic acid, and tea polyphenol powder is gradually added to the polylactic acid solution to make the bio-based adhesive film have antioxidant properties, and UV-531 is gradually added to the mixed solution of polylactic acid and tea polyphenols to increase the UV resistance of the bio-based adhesive film;

[0090] Use a stirrer to fully mix the mixed solution of polylactic acid, tea polyphenols powder, and UV-531 to form a bio-based film mixed solution. After mixing, dry the bio-based film mixed solution at room temperature to solidify the bio-based film. Then, lay them in the order of glass panel-film-cell-film-backplane from top to bottom, and then hot-press them at 150°C. After cutting and wiring, BIPV modules containing bio-based films are prepared. The prepared BIPV modules containing bio-based films are quality inspected to prepare BIPV modules with bio-based films that meet performance requirements.

[0091] Example 2

[0092] See also Figure 2 The present invention provides an embodiment: a method for preparing a BIPV component containing a bio-based adhesive film, wherein the preparation of polylactic acid in the material preparation comprises the following steps:

[0093] Lactic acid preparation: Lactic acid is produced by fermenting sugarcane juice with lactic acid bacteria;

[0094] Dehydration cyclization: Lactic acid is dehydrated and cyclized at 1000Pa and 130°C to generate lactide;

[0095] Lactide alcoholization: distillation, crystallization and alcoholization of the generated lactide;

[0096] Ring-opening polymerization: Add the alcoholized lactide into a polymerization reactor, add stannous octoate to cause the lactide to undergo a ring-opening polymerization reaction to form polylactic acid;

[0097] Furthermore, sugarcane juice is fermented with lactic acid bacteria to produce lactic acid, and the lactic acid is dehydrated. In the presence of a dehydrating agent, the hydroxyl and carboxyl groups in the lactic acid molecules are thermally dehydrated and directly polycondensed to form oligomers. A catalyst is added under the conditions of 1000 Pa and 130° C., and low relative molecular weight polylactic acid is polymerized into lactide. The generated lactide is distilled, crystallized and alcoholized, and the alcoholized lactide is added to a polymerization reactor. The cyclohexyl ester group of the lactide molecule undergoes a ring-opening reaction under the action of a catalyst, stannous octoate, to generate an intermediate, and then polylactic acid is generated through a polycondensation reaction.

[0098] Example 3

[0099] See also Figure 3 The present invention provides an embodiment: a method for preparing a BIPV component containing a bio-based adhesive film, wherein the preparation of the antioxidant tea polyphenol powder comprises the following steps:

[0100] Crushing tea leaves: Prepare green tea leaves and crush them into granules;

[0101] Ethanol extraction: add ethanol to tea granules at a ratio of 1g:10ml, and extract by shaking;

[0102] Separating the supernatant: filtering the extract to separate the supernatant;

[0103] Concentration and drying: The supernatant is dried and concentrated to obtain an extract;

[0104] Extraction: Add water to the extract at a solid-liquid ratio of 1g:10ml and stir evenly, then add hemp oil at a volume ratio of 1:2, shake and extract 3 times, and collect the aqueous extract;

[0105] Column elution: adjust the pH value of the aqueous phase extract to 4, then load it onto a polyamide resin column, first wash the column with water to remove impurities, then wash the column with 70% by volume ethanol, and collect the ethanol eluate;

[0106] Recovering ethanol: Recovering ethanol from the ethanol eluate under reduced pressure to concentrate tea polyphenols;

[0107] Drying: drying the concentrated tea polyphenols to obtain tea polyphenol powder;

[0108] Further, green tea leaves are crushed into particles using a pulverizer, ethanol is added to the tea particles at a ratio of 1g:10ml of tea leaves to ethanol, and then the mixture is shaken for extraction, the extract is filtered, a supernatant is separated, the supernatant is dried and concentrated to obtain an extract, water is added to the extract at a ratio of 1g:10ml of solid to liquid, and stirred, and then hemp oil is added at a volume ratio of 1:2, and the extract is shaken for extraction 3 times, an aqueous extract is collected, and the aqueous extract is eluted on a column after being collected;

[0109] The elution is carried out after appropriate pretreatment according to the type and properties of the column, and the separated mixture is loaded onto the chromatographic column. The aqueous extract is introduced by injection, and the column is washed with ethanol having a volume concentration of 70% to separate the aqueous extract. During the elution process, the ethanol eluate is collected, and the eluate contains the separated components. The collected eluate is tested and analyzed to determine the presence and concentration of the components. The ethanol eluate is decompressed to recover ethanol to concentrate the tea polyphenols. The concentrated tea polyphenols are dried to obtain tea polyphenols powder.

[0110] Example 4

[0111] See also Figure 4 The present invention provides an embodiment: a method for preparing a BIPV component containing a bio-based adhesive film, wherein the preparation of the ultraviolet absorber UV-531 comprises the following steps:

[0112] Reaction apparatus: The reaction was carried out in a three-necked flask equipped with a stirrer and a condenser reflux tube;

[0113] Raw material addition: Add resorcinol, octanol, distilled water and zinc chloride, stir to dissolve the resorcinol;

[0114] Cooling: Cool the system to 3°C with chilled brine;

[0115] Add reactants dropwise: slowly add trichloromethylbenzene dropwise while keeping the system temperature at 5°C;

[0116] Temperature reaction: gradually increase the system temperature to 60°C at a rate of 1°C per minute;

[0117] Reflux: Raise the reaction temperature to 120°C and reflux for 2.5 hours;

[0118] Product treatment: washing, post-treatment and refining the product to obtain UV-531;

[0119] Further, resorcinol, octanol, distilled water and zinc chloride were added to a three-necked flask equipped with a stirrer and a condenser reflux tube, and the resorcinol was dissolved by stirring. The system was cooled to 3°C with chilled brine, and trichloromethylbenzene was slowly added dropwise while maintaining the system temperature at 5°C. The system temperature was gradually increased to 60°C at a rate of 1°C per minute, and the reaction temperature was increased to 120°C, and refluxed for 2.5 hours;

[0120] Turn on the circulating water pump for washing, adjust the vacuum degree to 0.092MPa, absorb excess HCI with circulating water, then cool the reaction system to 70°C, transfer the reaction intermediate product to a separatory funnel, wash twice with water, separate the water phase, transfer the reaction intermediate product back to the reaction bottle, add catalysts KI and PA, react at 110°C, 0.092MPa for 4 hours, after the reaction is completed, cool the system temperature to 70°C, wash twice with 70°C water, separate the water phase, remove the remaining n-octanol under a vacuum degree of 0.1MPa to obtain a crude product, wash three times with ethanol, separate the ethanol, and dry the crystals to obtain the finished product.

[0121] Example 5

[0122] See also Figure 5 The present invention provides an embodiment: a method for preparing a BIPV component containing a bio-based adhesive film, wherein the preparation of the polyethylene comprises the following steps:

[0123] Raw material preparation: prepare ethylene monomer;

[0124] Feed: Ethylene monomer is fed into the reactor;

[0125] Initiation reaction: Add initiator to initiate polymerization reaction, and carry out polymerization under high temperature 200°C and high pressure 150MPa;

[0126] Discharging: After the reaction is completed, the product polyethylene is discharged from the reactor;

[0127] Subsequent treatment: further treatment and processing of the product;

[0128] Furthermore, ethylene monomer is put into a reactor, free radicals are generated under the action of an initiator, and ethylene polymerization is initiated. The polymerization is carried out under high temperature of 200°C and high pressure of 150MPa. The initiator decomposes to generate free radicals, which react with ethylene molecules to form active species. Then the active species continuously add to the ethylene molecules to make the molecular chain grow. The generated polyethylene is separated and purified from unreacted monomers, catalysts, etc., and the polyethylene is dried to remove moisture.

[0129] Example 6

[0130] See also Figure 5 The present invention provides an embodiment: a method for preparing a BIPV component containing a bio-based adhesive film, wherein the steps of adding polyethylene to the UV-531 are as follows:

[0131] Prepare materials: Weigh equal proportions of polyethylene and UV-531;

[0132] Preliminary mixing: Place polyethylene in a container and use a stirrer for preliminary mixing;

[0133] Heating and melting: Heat the mixed materials to 130°C to turn the polyethylene into a molten state;

[0134] Adding UV-531: When polyethylene is molten, gradually add UV-531 into the melt;

[0135] Processing and molding: Ensure that UV-531 is evenly distributed in polyethylene before extrusion and injection molding of the product;

[0136] Further, polyethylene particles and UV-531 ultraviolet absorber are prepared, and equal proportions of polyethylene particles and UV-531 ultraviolet absorber are added into a reaction container, and the polyethylene particles and UV-531 ultraviolet absorber are evenly mixed using a blender to ensure that UV-531 is evenly dispersed in the polyethylene, and the mixed polyethylene and UV-531 are melted and molded by an injection molding machine. During the melting process, UV-531 is fully mixed with the polyethylene and evenly dispersed in the polyethylene matrix. After the melt processing, the product undergoes a cooling and solidification process to form a desired shape and size.

[0137] Example 7

[0138] An embodiment provided by the present invention is a method for preparing a BIPV module containing a bio-based adhesive film, characterized in that it includes preparing a BIPV module containing a bio-based adhesive film, and the preparation steps of the BIPV module containing a bio-based adhesive film are as follows:

[0139] Material preparation: prepare polylactic acid as bio-based material, ethanol solvent, and additives;

[0140] Solution preparation: dissolving polylactic acid in ethanol solvent to form a uniform solution;

[0141] Blending modification: blending with polyethylene;

[0142] Adding UV absorber: gradually add UV-531 into the mixed solution of polylactic acid;

[0143] Stirring and mixing: using a stirrer to fully mix the mixed solution of polylactic acid and UV-531 to form a bio-based film mixed solution;

[0144] Drying: drying the mixed solution of the bio-based adhesive film at room temperature to solidify the bio-based adhesive film;

[0145] Laying: Laying in the order of glass panel-bio-based adhesive film-cell-bio-based adhesive film-back panel from top to bottom, and then hot pressing at a high temperature of 150°C, and then cutting and wiring to prepare BIPV modules containing bio-based adhesive film;

[0146] Quality inspection: Conduct quality inspection on the manufactured BIPV modules containing bio-based adhesive films.

[0147] Example 8

[0148] An embodiment provided by the present invention is a method for preparing a BIPV module containing a bio-based adhesive film, including preparing the BIPV module of the bio-based adhesive film, wherein the steps for preparing the BIPV module of the bio-based adhesive film are as follows:

[0149] Material preparation: prepare polylactic acid as bio-based material, ethanol solvent, and additives;

[0150] Solution preparation: dissolving polylactic acid in ethanol solvent to form a uniform solution;

[0151] Blending modification: blending with polyethylene;

[0152] Adding antioxidants: gradually adding tea polyphenol powder into the polylactic acid solution;

[0153] Stirring and mixing: using a stirrer to fully mix the mixed solution of polylactic acid and tea polyphenol powder to form a bio-based film mixed solution;

[0154] Drying: drying the mixed solution of the bio-based adhesive film at room temperature to solidify the bio-based adhesive film;

[0155] Laying: Laying in the order of glass panel-bio-based adhesive film-cell-bio-based adhesive film-back panel from top to bottom, and then hot pressing at a high temperature of 150°C, and then cutting and wiring to prepare BIPV modules containing bio-based adhesive film;

[0156] Quality inspection: Conduct quality inspection on the manufactured BIPV modules containing bio-based adhesive films.

[0157] Performance Testing

[0158] Test 1: Oxidation resistance test: Equal amounts of the bio-based adhesive film samples of Example 1, Example 7 and Example 8 were exposed to an environment with a strong oxidant for one week, and the surface conditions of the samples were observed.

[0159] Test 2: UV resistance test: Equal amounts of the bio-based film samples of Example 1, Example 7 and Example 8 were placed in a UV light box for one week, and the surface conditions of the samples were observed.

[0160] Table 1 Test results of performance test 1

[0161] Example Included Materials Test Results Example 1 Polylactic acid, polyethylene, tea polyphenol powder, UV-531 No change Example 7 Polylactic acid, polyethylene, UV-531 There are cracks Example 8 Polylactic acid, polyethylene, tea polyphenols powder No change

[0162] Table 2 Test results of performance test 2

[0163] Example Included Materials Test Results Example 1 Polylactic acid, polyethylene, tea polyphenol powder, UV-531 No change Example 7 Polylactic acid, polyethylene, UV-531 No change Example 8 Polylactic acid, polyethylene, tea polyphenols powder Darkening of colors

[0164] Working principle: first prepare polylactic acid as a bio-based material, dissolve polylactic acid in ethanol solvent to form a uniform solution, add polyethylene to blend with polylactic acid to improve the performance of polylactic acid, and gradually add tea polyphenol powder and UV-531 into the mixed solution;

[0165] Then, a stirrer is used to fully mix the mixed solution of polylactic acid, polyethylene, tea polyphenol powder, and UV-531 to form a bio-based adhesive film mixed solution, and after the mixing is completed, the bio-based adhesive film mixed solution is dried at room temperature to solidify the bio-based adhesive film;

[0166] Finally, the glass panel - bio-based film - battery cell - bio-based film - back panel are laid in the order from top to bottom, and then hot-pressed at 150°C. BIPV modules containing bio-based film are prepared through cutting and wiring. The prepared BIPV modules containing bio-based film are quality inspected to prepare BIPV modules with bio-based film that meet performance requirements.

[0167] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. A method for preparing a BIPV module containing a bio-based adhesive film, Features: The preparation of a BIPV component including a bio-based adhesive film, wherein the steps of preparing the BIPV component including the bio-based adhesive film are as follows: Material preparation: prepare polylactic acid as bio-based material, ethanol solvent, and additives; Solution preparation: dissolving polylactic acid in ethanol solvent to form a uniform solution; Blending modification: blending with polyethylene; Adding antioxidants: gradually adding tea polyphenol powder into the polylactic acid solution; Adding UV absorber: gradually adding UV-531 into the mixed solution of polylactic acid and tea polyphenols; Stirring and mixing: using a stirrer to fully mix the mixed solution of polylactic acid, tea polyphenol powder and UV-531 to form a bio-based film mixed solution; Drying: drying the bio-based adhesive film mixed solution at room temperature to solidify the bio-based adhesive film; Laying: Laying in the order of glass panel-bio-based adhesive film-cell-bio-based adhesive film-back panel from top to bottom, and then hot pressing at a high temperature of 150°C, and then cutting and wiring to prepare BIPV modules containing bio-based adhesive film; Quality inspection: Conduct quality inspection on the manufactured BIPV modules containing bio-based adhesive films; The BIPV component containing the bio-based adhesive film comprises: 70% polylactic acid, 10% polyethylene, 10% tea polyphenol powder and 10% UV-531.

2. A method for preparing a BIPV module containing a bio-based adhesive film according to claim 1, Features: The preparation of polylactic acid in the material preparation comprises the following steps: Lactic acid preparation: Lactic acid is produced by fermenting sugarcane juice with lactic acid bacteria; Dehydration cyclization: Lactic acid is dehydrated and cyclized at 1000Pa and 130°C to generate lactide; Lactide alcoholization: distillation, crystallization and alcoholization of the generated lactide; Ring-opening polymerization: Add the alcoholized lactide into a polymerization reactor, and add stannous octoate to cause the lactide to undergo ring-opening polymerization to form polylactic acid.

3. The method for preparing a BIPV module containing a bio-based adhesive film according to claim 1, Features: The preparation of the antioxidant tea polyphenols powder comprises the following steps: Crushing tea leaves: Prepare green tea leaves and crush them into granules; Ethanol extraction: add ethanol to tea granules at a ratio of 1g:10ml, and extract by shaking; Separating the supernatant: filtering the extract to separate the supernatant; Concentration and drying: The supernatant is dried and concentrated to obtain an extract; Extraction: Add water to the extract at a solid-liquid ratio of 1g:10ml and stir evenly, then add hemp oil at a volume ratio of 1:2, shake and extract 3 times, and collect the aqueous extract; Column elution: adjust the pH value of the aqueous phase extract to 4, then load it onto a polyamide resin column, first wash the column with water to remove impurities, then wash the column with 70% by volume ethanol, and collect the ethanol eluate; Recovering ethanol: Recovering ethanol from the ethanol eluate under reduced pressure to concentrate tea polyphenols; Drying: Dry the concentrated tea polyphenols to obtain tea polyphenol powder.

4. The method for preparing a BIPV module containing a bio-based adhesive film according to claim 1, Features: The preparation of the ultraviolet absorber UV-531 comprises the following steps: Reaction apparatus: The reaction was carried out in a three-necked flask equipped with a stirrer and a condenser reflux tube; Raw material addition: Add resorcinol, octanol, distilled water and zinc chloride, stir to dissolve the resorcinol; Cooling: Cool the system to 3°C with chilled brine; Add reactants dropwise: slowly add trichloromethylbenzene dropwise while keeping the system temperature at 5°C; Temperature reaction: gradually increase the system temperature to 60°C at a rate of 1°C per minute; Reflux: Raise the reaction temperature to 120°C and reflux for 2.5 hours; Product treatment: The product is washed, post-treated and refined to obtain UV-531.

5. The method for preparing a BIPV module containing a bio-based adhesive film according to claim 1, Features: The preparation of the polyethylene comprises the following steps: Raw material preparation: prepare ethylene monomer; Feed: Ethylene monomer is fed into the reactor; Initiation reaction: Add initiator to initiate polymerization reaction, and carry out polymerization under high temperature 200°C and high pressure 150MPa; Discharging: After the reaction is completed, the product polyethylene is discharged from the reactor; Subsequent processing: further treatment and processing of the product.

6. The method for preparing a BIPV module containing a bio-based adhesive film according to claim 2, Features: The steps of lactide alcoholization are as follows: Prepare raw materials: put the prepared lactide into a reaction container and prepare ethanol solvent; Dissolving lactide: Add ethanol solvent into the reaction vessel and stir to fully dissolve the lactide; Alcoholization reaction: Lactide undergoes an alcoholization reaction with ethanol solvent to form an alcoholized lactide product; Product separation: Separate the alcoholized lactide product from the ethanol solvent by filtration, precipitation and distillation; Purification: The lactide product is purified to obtain high-purity lactide.

7. The method for preparing a BIPV module containing a bio-based adhesive film according to claim 3, Features: The steps of eluting from the upper column are as follows: Pretreatment: Perform appropriate pretreatment according to the type and properties of the column; Loading: Wait for the separated mixture to be loaded onto the chromatographic column and introduce the aqueous extract by injection; Elution: Wash the column with 70% ethanol to separate the aqueous extract; Collecting the eluate: During the elution process, collecting the ethanol eluate, the eluate contains the separated components; Detection and analysis: The collected eluate is detected and analyzed to determine the presence and concentration of components.

8. The method for preparing a BIPV module containing a bio-based adhesive film according to claim 4, Features: The product processing in the preparation of UV-531 includes the following steps: Washing: Turn on the circulating water pump, adjust the vacuum degree to 0.092MPa, absorb the excess HCI with circulating water, then cool the reaction system to 70℃, transfer the reaction intermediate product into a separatory funnel, wash twice with water, and separate the water phase; Post-treatment: the reaction intermediate product was transferred back into the reaction bottle, and catalysts KI and PA were added, and the reaction was carried out at 110°C and 0.092MPa for 4 hours. After the reaction was completed, the system temperature was cooled to 70°C, washed twice with 70°C water, the water phase was separated, and the remaining n-octanol was removed at a vacuum degree of 0.1MPa to obtain a crude product; Refining: Wash with ethanol three times, remove the ethanol, and dry the crystals to obtain the finished product.

9. The method for preparing a BIPV module containing a bio-based adhesive film according to claim 2, Features: The basic principle of ring-opening polymerization in the preparation of polylactic acid is to utilize the cyclohexyl ester group of lactide molecules to undergo a ring-opening reaction under the action of a catalyst, stannous octoate, to generate an intermediate, and then generate polylactic acid through a condensation reaction.

10. A BIPV module containing a bio-based adhesive film, suitable for the preparation method of a BIPV module containing a bio-based adhesive film according to any one of claims 1 to 9, Features: The BIPV module containing the bio-based adhesive film includes: a glass panel, a battery cell, and a backplane, which are laid in the order of glass panel-adhesive film-battery cell-adhesive film-backplane from top to bottom, and then hot-pressed at a high temperature of 150°C, and then cut and wired to prepare the BIPV module containing the bio-based adhesive film.

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