CN112226065A - Glass film with heat preservation and insulation functions and preparation method thereof - Google Patents

Glass film with heat preservation and insulation functions and preparation method thereof Download PDF

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CN112226065A
CN112226065A CN201910637103.1A CN201910637103A CN112226065A CN 112226065 A CN112226065 A CN 112226065A CN 201910637103 A CN201910637103 A CN 201910637103A CN 112226065 A CN112226065 A CN 112226065A
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transparent
glass film
film
preparation
aerogel
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CN112226065B (en
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毛智勇
梁毅
陈静静
王达健
赵阳
常树鑫
张光权
张昊
雷宇程
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Tju Binhai Industrial Research Institute Co ltd
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Tianjin University of Technology
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    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
    • C08J5/18—Manufacture of films or sheets
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2375/00—Characterised by the use of polyureas or polyurethanes; Derivatives of such polymers
    • C08J2375/04—Polyurethanes
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2423/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
    • C08J2423/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
    • C08J2423/04—Homopolymers or copolymers of ethene
    • C08J2423/06—Polyethene
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K13/00—Use of mixtures of ingredients not covered by one single of the preceding main groups, each of these compounds being essential
    • C08K13/06—Pretreated ingredients and ingredients covered by the main groups C08K3/00 - C08K7/00
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
    • C08K3/20—Oxides; Hydroxides
    • C08K3/22—Oxides; Hydroxides of metals
    • C08K2003/2237—Oxides; Hydroxides of metals of titanium
    • C08K2003/2241—Titanium dioxide
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K2201/00—Specific properties of additives
    • C08K2201/002—Physical properties
    • C08K2201/003—Additives being defined by their diameter
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K2201/00—Specific properties of additives
    • C08K2201/011—Nanostructured additives
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K5/00—Use of organic ingredients
    • C08K5/16—Nitrogen-containing compounds
    • C08K5/20—Carboxylic acid amides
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K5/00—Use of organic ingredients
    • C08K5/49—Phosphorus-containing compounds
    • C08K5/51—Phosphorus bound to oxygen
    • C08K5/52—Phosphorus bound to oxygen only
    • C08K5/521—Esters of phosphoric acids, e.g. of H3PO4
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K7/00—Use of ingredients characterised by shape
    • C08K7/22—Expanded, porous or hollow particles
    • C08K7/24—Expanded, porous or hollow particles inorganic
    • C08K7/26—Silicon- containing compounds
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K9/00—Use of pretreated ingredients
    • C08K9/04—Ingredients treated with organic substances
    • C08K9/06—Ingredients treated with organic substances with silicon-containing compounds

Abstract

The invention discloses a glass film with heat preservation and insulation functions and a preparation method thereof, wherein the preparation method comprises the following steps: will be provided withTransparent aliphatic thermoplastic polyurethane elastomer, transparent nano indium tin oxide, modified nano silicon dioxide aerogel and nano TiO2Mixing an antioxidant, a lubricant and a heat stabilizer, performing vacuum dehydration to obtain a mixture material, preheating the mixture material, sequentially passing through a feeding region, a compression region and a metering region in a single-screw extruder, performing re-extrusion to obtain an extruded material, placing the extruded material in a casting machine for casting, cooling by a cooling roller, and rolling and slicing to obtain a film; the glass film with the heat insulation and radiation performance, the heat insulation and conduction performance and the good explosion-proof capacity is integrally prepared, and meanwhile, the process flow is effectively reduced, and the cost is reduced.

Description

Glass film with heat preservation and insulation functions and preparation method thereof
Technical Field
The invention belongs to the technical field of heat insulation films, and particularly relates to a glass film with heat preservation and insulation functions and a preparation method thereof.
Background
Since films to be attached to the surface of automobile glass are generally called as automobile films and explosion-proof films, and are originally called as solar films, the automobile films are designed to cope with hot and burning sunlight and ultraviolet light in summer as the name suggests. The explosion-proof membrane has the functions of heat insulation and light insulation and explosion prevention. The existing heat insulation film mostly adopts a composite structure of a PET (polyethylene terephthalate) explosion-proof layer, a heat insulation layer and a UC (ultraviolet) scratch-proof layer, wherein the heat insulation layer is prepared by uniformly distributing noble metals (Au, Ag and the like) or metal oxide particles (ITO, ATO and the like) for isolating red and ultraviolet rays on a PET substrate by a magnetron sputtering technology, so that 70% of visible light is selectively transmitted, about 90% of infrared rays and 99% of ultraviolet rays are isolated, the explosion-proof function is realized by high elasticity of the PET film (the tensile strength is 45 MPa-100 MPa), and the scratch-proof layer is realized by the wear resistance of the UV film.
However, for a closed system for closing a vehicle door, the heat transfer form of the vehicle glass is not only one of the solar radiation heat, but mainly comprises two ways of heat radiation heat transfer and heat conduction heat transfer, wherein the heat radiation heat transfer accounts for about 70% and the heat conduction accounts for about 30%. The current development of heat insulating films for automobile glass aims to reduce the heat radiation and heat transfer of the glass, and 30% of heat conduction and heat transfer are generally ignored. For example: the invention has the following patent: CN 102259448A, which discloses a nano ceramic heat insulation film and a preparation method thereof, wherein the heat insulation film is divided into a composite film layer of a heat insulation layer and an anti-scraping layer; the invention has the following patent: CN 104417000A discloses an automobile rupture membrane and a preparation method thereof, the automobile rupture membrane comprises a PET carrier layer, the front surface of the PET carrier layer is provided with a hardened wear-resistant layer formed by coating hardened wear-resistant paint, the back surface of the PET carrier layer is provided with a heat-proof light changing layer formed by coating heat-proof light changing paint, and the outer surfaces of the hardened wear-resistant layer and the heat-proof light changing layer are compounded with a protective membrane layer.
Disclosure of Invention
In view of the defects of the prior art, the invention aims to provide a glass film with heat preservation and insulation functions, which can simultaneously reduce heat radiation and heat conduction.
The invention also aims to provide a preparation method of the glass film.
The purpose of the invention is realized by the following technical scheme.
A preparation method of a glass film with heat preservation and insulation functions comprises the following steps:
1) according to the mass parts, 50-70 parts of transparent aliphatic thermoplastic polyurethane elastomer (transparent aliphatic TPU), 10-20 parts of transparent nano indium tin oxide, 10-15 parts of modified nano silica aerogel and 5-10 parts of nano TiO are mixed20.1-1 part of antioxidant, 0.5-3 parts of lubricant and 1-2 parts of heat stabilizer, and carrying out vacuum dehydration at 100-120 ℃ for 3-4 h to ensure that the humidity is not more than 0.02% to obtain a mixture material, wherein the preparation method of the modified nano silicon dioxide aerogel comprises the following steps: mixing transparent SiO2Mixing aerogel with silane coupling agent and absolute ethyl alcoholMixing, stirring at the rotating speed of 300-450 rpm for 40-60 min, wherein the transparent SiO is calculated by mass percent25-10 wt% of aerogel, 1-2 wt% of silane coupling agent and the balance of absolute ethyl alcohol.
In the step 1), the light transmittance of the transparent aliphatic thermoplastic polyurethane elastomer is 95% or more.
In the step 1), the particle size of the transparent nano indium tin oxide is 25-45 nm.
In the step 1), the transparent SiO2The particle size of the aerogel is 20-100 nm, and the light transmittance is more than 90%.
In the step 1), the nano TiO2The particle size of (A) is 10 to 60 nm.
In the step 1), the antioxidant is antioxidant 1010, antioxidant 1076, antioxidant 168, antioxidant 264 or antioxidant 2246.
In the step 1), the lubricant is polyethylene, stearamide, ethylene bis stearamide, methyl stearate, butyl stearate, zinc stearate, butyl acetate or barium stearate.
In the step 1), the molecular weight of the polyethylene is 500-2000.
In the step 1), the heat stabilizer is triethyl phosphate.
2) Preheating the mixture material at 160-180 ℃ for 20-40 min, sequentially passing through a feeding zone, a compression zone and a metering zone in a single-screw extruder, and extruding to obtain an extruded material, wherein the temperature of the feeding zone is 210-230 ℃, the temperature of the compression zone is 220-240 ℃, and the temperature of the metering zone is 220-240 ℃.
In the step 2), the screw of the single screw extruder is a separation type screw.
In the step 2), the diameter of the separation type screw is 30-90 mm, and the length-diameter ratio is (15-40): 1.
in the step 2), the rotating speed of the screw is 40-60 rpm.
In the step 2), the output of the single-screw extruder is 500-1500 kg/h.
3) Placing the extruded material in a casting machine for casting, cooling by a cooling roller at the temperature of 20-40 ℃, rolling and slicing to obtain a film with the thickness of 0.3-1.0 mm;
in the step 3), the winding speed is 2-50 m/min, and the length of the film after slicing is 2m per section.
In the step 3), the temperature of the extruder die head of the casting machine is 220-240 ℃.
In the step 3), the casting speed of the casting machine is 2-50 m/min.
4) Preheating the film at 80-130 ℃ for 5-10 min, performing transverse stretching and longitudinal stretching, shaping at 140-180 ℃ for 10-30 min, and cooling at 20-40 ℃ for 20-40 min to obtain the glass film, wherein the transverse stretching multiple is 2-4 times, and the longitudinal stretching multiple is 0.5-1.5 times.
In the step 4), the drawing speed is 3-10 mm/s,
in the technical scheme, the thickness of the glass film is 0.2-0.4 mm.
The glass film obtained by the preparation method.
The invention has the following beneficial effects: the glass film with the heat-insulating radiation function, the heat-insulating conduction function and the good explosion-proof capability (mechanical property) is integrally prepared, and meanwhile, the process flow is effectively reduced and the cost is reduced.
Detailed Description
The technical scheme of the invention is further explained by combining specific examples.
Drug purchase Source referred to in the following examples
Transparent aliphatic thermoplastic polyurethane elastomer: basf 1180A, germany, with a transmittance of 95%.
Transparent nano indium tin oxide (powder): shanghai Aladdin company I123223
Transparent SiO2Aerogel: jiangxi Bo Kai science and technology
Silane coupling agent WD-70: shanghai Aladdin Co Ltd
Nano TiO 2: shanghai Aladdin company T104943
Anhydrous ethanol: shanghai Aladdin Co Ltd
Antioxidant 1010, antioxidant 168, antioxidant 2246: shanghai Aladdin Co.
Polyethylene with molecular weight 1000: jiangyin city of Jiangyin province of Jiangsu province, Shandongfeng chemical industry Co., Ltd
Butyl acetate: shanghai Aladdin B119685
Ethylene bis stearamide: shanghai Aladdin N159314
Triethyl phosphate: shanghai Aladdin T103503
Model and manufacturer of the instruments referred to in the following examples
The vacuum dehydration adopts the following instruments: vacuum filter of Shandong Xinhua-environmental engineering Limited company
A high-speed stirrer: high speed mixer SHR-1000 of Sailawei company, Suzhou
A single screw extruder and casting machine combined unit: junxin JX-001 of Guangdong Dongguan city
A biaxial stretching machine: guangzhou common MDEL
The rolled slices in the following examples are: the winding speed is 3m/s, and the length of the sliced film is 2 m.
Examples 1 to 3
A preparation method of a glass film with heat preservation and insulation functions comprises the following steps:
1) transparent aliphatic thermoplastic polyurethane elastomer (transparent aliphatic TPU), transparent nano indium tin oxide, modified nano silicon dioxide aerogel and nano TiO2Mixing antioxidant, lubricant and heat stabilizer, vacuum dehydrating at 120 deg.C for 4 hr to make humidity 0.02%, to obtain mixture material, transparent aliphatic thermoplastic polyurethane elastomer (transparent aliphatic TPU), transparent nano indium tin oxide, modified nano silica aerogel, and nano TiO2The mass parts of the antioxidant, the lubricant and the heat stabilizer are shown in Table 1. The preparation method of the modified nano-silica aerogel comprises the following steps: mixing transparent SiO2Mixing the aerogel with silane coupling agent and anhydrous ethanol, and stirring at 300rpm for 40min, whereinTransparent SiO2The ratio of the mass parts of the aerogel to the mass parts of the silane coupling agent to the mass parts of the absolute ethyl alcohol is 6:1.2:92.8
The transparent nano indium tin oxide has a particle size (average) of 40 nm.
Transparent SiO2The aerogel had a particle size (average) of 60nm and a light transmittance of 97%.
Nano TiO22Has a particle diameter (average) of 30 nm.
The antioxidant is antioxidant 1010.
The lubricant is polyethylene with molecular weight of 1000.
The heat stabilizer is triethyl phosphate.
2) Preheating the mixture material in a material barrel of a single-screw extruder at 160 ℃ for 20min, sequentially passing through a feeding region, a compression region and a metering region in the single-screw extruder, and extruding to obtain an extruded material, wherein the rotating speed of a screw is 40 rpm. The temperature in the feed zone is defined as 210 ℃, the temperature in the compression zone as 220 ℃ and the temperature in the metering zone as 220 ℃. The screw rod of single screw extruder is separation type screw rod, and the diameter of separation type screw rod is 90mm, and draw ratio is 25: 1. the throughput of the single-screw extruder was 500 kg/h.
3) Directly transferring the extruded material to a casting machine for casting, wherein the die head temperature of an extruder of the casting machine is 220 ℃, and the casting speed of the casting machine is 3 m/min. Cooling by a cooling roller at 20 ℃, rolling and slicing to obtain a film with the thickness of 0.3 mm;
4) preheating the film at 80 ℃ for 5min, performing transverse stretching and longitudinal stretching, shaping at 150 ℃ for 10min, and cooling at 25 ℃ for 20min to obtain the glass film with the thickness of 0.4mm, wherein the transverse stretching multiple is 2 times, the longitudinal stretching multiple is 1 time, and the stretching speed is 3 mm/s.
Examples 4 to 6
A preparation method of a glass film with heat preservation and insulation functions comprises the following steps:
1) transparent aliphatic thermoplastic polyurethane elastomer (transparent aliphatic TPU), transparent nano indium tin oxide, modified nano silicon dioxide aerogel and nano TiO2An antioxidantMixing the mixture with lubricant and heat stabilizer, vacuum dehydrating at 110 deg.C for 3 hr to make humidity 0.01%, to obtain mixture material, transparent aliphatic thermoplastic polyurethane elastomer (transparent aliphatic TPU), transparent nano indium tin oxide, modified nano silica aerogel, and nano TiO2The mass parts of the antioxidant, the lubricant and the heat stabilizer are shown in Table 1. The preparation method of the modified nano-silica aerogel comprises the following steps: mixing transparent SiO2Mixing the aerogel with a silane coupling agent and absolute ethyl alcohol, stirring at the rotating speed of 400rpm for 45min to obtain transparent SiO2The ratio of the mass parts of the aerogel to the mass parts of the silane coupling agent to the mass parts of the absolute ethyl alcohol is 10:1.5: 88.5;
the transparent nano indium tin oxide has a particle size (average) of 25 nm.
Transparent SiO2Particle size of aerogel (average 60 nm.
The antioxidant is antioxidant 168.
The lubricant is butyl acetate with molecular weight.
The heat stabilizer is triethyl phosphate.
2) Preheating the mixture material in a material barrel of a single-screw extruder at 165 ℃ for 25min, sequentially passing through a feeding area, a compression area and a metering area in the single-screw extruder, and extruding to obtain an extruded material, wherein the rotating speed of a screw is 60 rpm. The temperature in the feed zone is defined as 220 ℃, the temperature in the compression zone as 225 ℃ and the temperature in the metering zone as 225 ℃. The screw rod of single screw extruder is separation type screw rod, and the diameter of separation type screw rod is 90mm, and draw ratio is 30: 1. the throughput of the single-screw extruder was 600 kg/h.
3) And placing the extruded material in a casting machine for casting, wherein the die head temperature of an extruder of the casting machine is 240 ℃, and the casting speed of the casting machine is 10 m/min. Cooling by a cooling roller at 25 ℃, rolling and slicing to obtain a film with the thickness of 0.4 mm;
4) preheating the film at 90 ℃ for 10min, performing transverse stretching and longitudinal stretching, shaping at 170 ℃ for 25min, and cooling at 20 ℃ for 25min to obtain the glass film with the thickness of 0.2mm, wherein the transverse stretching multiple is 2.5 times, the longitudinal stretching multiple is 0.5 times, and the stretching speed is 5 mm/s.
Examples 7 to 9
A preparation method of a glass film with heat preservation and insulation functions comprises the following steps:
1) transparent aliphatic thermoplastic polyurethane elastomer (transparent aliphatic TPU), transparent nano indium tin oxide, modified nano silicon dioxide aerogel and nano TiO2Mixing antioxidant, lubricant and heat stabilizer, vacuum dehydrating at 100 deg.C for 3.5h to make humidity 0.01%, to obtain mixture material, transparent aliphatic thermoplastic polyurethane elastomer (transparent aliphatic TPU), transparent nanometer indium tin oxide, modified nanometer silica aerogel, nanometer TiO2The mass parts of the antioxidant, the lubricant and the heat stabilizer are shown in Table 1. The preparation method of the modified nano-silica aerogel comprises the following steps: mixing transparent SiO2Mixing the aerogel with a silane coupling agent and absolute ethyl alcohol, stirring at the rotating speed of 450rpm for 40min to obtain transparent SiO2The mass portion ratio of the aerogel to the silane coupling agent to the absolute ethyl alcohol is 10:2:88
The transparent nano indium tin oxide has a particle size (average) of 40 nm.
Transparent SiO2The aerogel had a particle size (average) of 50nm and a light transmittance of 97%.
Nano TiO22Has a particle diameter (average) of 50 nm.
The antioxidant is antioxidant 2246.
The lubricant is ethylene bis stearamide with a molecular weight.
The heat stabilizer is triethyl phosphate.
2) Preheating the mixture material in a material barrel of a single-screw extruder at 180 ℃ for 20min, sequentially passing through a feeding area, a compression area and a metering area in the single-screw extruder, and extruding to obtain an extruded material, wherein the rotating speed of a screw is 60 rpm. The temperature in the feed zone is defined as 215 ℃, the temperature in the compression zone as 240 ℃ and the temperature in the metering zone as 240 ℃. The screw of single screw extruder is separation type screw, and the diameter of separation type screw is 60mm, and draw ratio is 30: 1. the throughput of the single-screw extruder was 600 kg/h.
3) And directly transferring the extruded material to a casting machine for casting, wherein the die head temperature of an extruder of the casting machine is 240 ℃, and the casting speed of the casting machine is 15 m/min. Cooling by a cooling roller at 25 ℃, rolling and slicing to obtain a film with the thickness of 1 mm;
4) preheating the film at 100 ℃ for 5min, performing transverse stretching and longitudinal stretching, shaping at 180 ℃ for 30min, and cooling at 30 ℃ for 40min to obtain the glass film with the thickness of 0.3mm, wherein the transverse stretching multiple is 4 times, the longitudinal stretching multiple is 1.5 times, and the stretching speed is 8 mm/s.
TABLE 1
Figure BDA0002130676110000061
Figure BDA0002130676110000071
The properties of the glass films obtained in examples 1 to 9 are shown in Table 2.
TABLE 2
Figure BDA0002130676110000072
Figure BDA0002130676110000081
As can be seen from Table 2, in a preferred state (example 3 described below), the glass film of the present invention has a visible light transmittance of 75%, a near infrared transmittance of 12%, an ultraviolet transmittance of 10%, an integrated heat-insulating emissivity of 61%, and a thermal conductivity of only 0.06W/m-K, which is between that of the transparent aliphatic thermoplastic polyurethane elastomer (0.16W/m-K) and that of the silica aerogel (0.02W/m-K), and is much lower than that of PET (0.2W/m-K). The glass film has the tensile strength of 92Mpa and the elongation at break of 303 percent, has good impact resistance, adopts transparent aliphatic TPU to ensure that the glass film achieves the highest level 5H yellowing resistance, can effectively prolong the service life, and is resistant to scratch and wear.
The invention has been described in an illustrative manner, and it is to be understood that any simple variations, modifications or other equivalent changes which can be made by one skilled in the art without departing from the spirit of the invention fall within the scope of the invention.

Claims (10)

1. A preparation method of a glass film with heat preservation and insulation functions is characterized by comprising the following steps:
1) according to the mass parts, 50-70 parts of transparent aliphatic thermoplastic polyurethane elastomer, 10-20 parts of transparent nano indium tin oxide, 10-15 parts of modified nano silica aerogel and 5-10 parts of nano TiO20.1-1 part of antioxidant, 0.5-3 parts of lubricant and 1-2 parts of heat stabilizer, and carrying out vacuum dehydration at 100-120 ℃ for 3-4 h to ensure that the humidity is not more than 0.02% to obtain a mixture material, wherein the preparation method of the modified nano silicon dioxide aerogel comprises the following steps: mixing transparent SiO2Mixing aerogel with a silane coupling agent and absolute ethyl alcohol, and stirring at the rotating speed of 300-450 rpm for 40-60 min, wherein the transparent SiO is calculated according to mass percentage25-10 wt% of aerogel, 1-2 wt% of silane coupling agent and the balance of absolute ethyl alcohol.
2) Preheating the mixture material at 160-180 ℃ for 20-40 min, sequentially passing through a feeding zone, a compression zone and a metering zone in a single-screw extruder, and extruding to obtain an extruded material, wherein the temperature of the feeding zone is 210-230 ℃, the temperature of the compression zone is 220-240 ℃, and the temperature of the metering zone is 220-240 ℃.
3) Placing the extruded material in a casting machine for casting, cooling by a cooling roller at the temperature of 20-40 ℃, rolling and slicing to obtain a film with the thickness of 0.3-1.0 mm;
4) preheating the film at 80-130 ℃ for 5-10 min, performing transverse stretching and longitudinal stretching, shaping at 140-180 ℃ for 10-30 min, and cooling at 20-40 ℃ for 20-40 min to obtain the glass film, wherein the transverse stretching multiple is 2-4 times, and the longitudinal stretching multiple is 0.5-1.5 times.
2. The production method according to claim 1, wherein in the step 1), the transparent aliphatic thermoplastic polyurethane elastomer has a light transmittance of 95% or more;
in the step 1), the particle size of the transparent nano indium tin oxide is 25-45 nm.
3. The production method according to claim 2, wherein in the step 1), the transparent SiO2The particle size of the aerogel is 20-100 nm, and the light transmittance is more than 90%;
in the step 1), the nano TiO2The particle size of (A) is 10 to 60 nm.
4. The method according to claim 3, wherein in the step 1), the antioxidant is 1010, 1076, 168, 264 or 2246;
in the step 1), the lubricant is polyethylene, stearamide, ethylene bis stearamide, methyl stearate, butyl stearate, zinc stearate, butyl acetate or barium stearate.
5. The method according to claim 4, wherein in the step 1), the polyethylene has a molecular weight of 500 to 2000;
in the step 1), the heat stabilizer is triethyl phosphate.
6. The production method according to claim 5, wherein in the step 2), the screw of the single-screw extruder is a separation-type screw;
in the step 2), the diameter of the separation type screw is 30-90 mm, and the length-diameter ratio is (15-40): 1.
7. the preparation method according to claim 6, wherein in the step 2), the rotation speed of the screw is 40-60 rpm;
in the step 2), the output of the single-screw extruder is 500-1500 kg/h.
8. The manufacturing method according to claim 7, wherein in the step 3), the winding speed is 2 to 50m/min, and the length of the film after slicing is 2m per segment;
in the step 3), the temperature of the extruder die of the casting machine is 220-240 ℃;
in the step 3), the casting speed of the casting machine is 2-50 m/min;
in the step 4), the drawing speed is 3-10 mm/s.
9. The glass film obtained by the production method according to claim 1 to 8.
10. The glass film according to claim 9, wherein the glass film has a thickness of 0.2 to 0.4 mm.
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