阅读说明：本技术 一种通过电场控制实现明暗变色的智能节能薄膜及其制备方法 (Intelligent energy-saving film for realizing light and shade color change through electric field control and preparation method thereof ) 是由 吴健 于 2021-09-15 设计创作，主要内容包括：本申请涉及调光薄膜领域,具体公开了一种通过电场控制实现明暗变色的智能节能薄膜及其制备方法。两层透光膜,两层所述透光膜间隔设置；两层导电薄膜,每层所述导电薄膜均设于所述透光膜的一侧且相对间隔设置；若干电致收缩颗粒,每个所述电致收缩颗粒两层相两层导电薄膜层之间且能在电场控制下实现体积形变,以调节通过电场控制实现明暗变色的智能节能薄膜的透光率为0.1％～70％。其制备方法包括：S1、导电薄膜沉积；S2、涂布制备；S3、固化静置。本申请选用电致收缩颗粒为主要材料进行制备,通过电场控制实现明暗变色的智能节能薄膜,有效改善通过电场控制实现明暗变色的智能节能薄膜明暗调节性能不佳的缺陷。(The application relates to the field of dimming films, and particularly discloses an intelligent energy-saving film for realizing light and shade color change through electric field control and a preparation method thereof. The two layers of light-transmitting films are arranged at intervals; the two layers of conductive films are arranged on one side of the light-transmitting film and are oppositely arranged at intervals; the volume deformation can be realized between two layers of conductive thin film layers of two phases of each electrostrictive particle under the control of an electric field, so that the light transmittance of the intelligent energy-saving thin film for realizing the light and shade color change through the control of the electric field is adjusted to be 0.1-70%. The preparation method comprises the following steps: s1, depositing a conductive film; s2, coating preparation; and S3, solidifying and standing. According to the application, the electrostrictive particles are selected as main materials to be prepared, the intelligent energy-saving film with the light and shade changing effect is realized through electric field control, and the defect of poor light and shade adjusting performance of the intelligent energy-saving film with the light and shade changing effect through electric field control is effectively overcome.)

1. The utility model provides an energy-conserving film of intelligence through electric field control realization light and shade color change which characterized in that includes:

the two layers of light-transmitting films are arranged at intervals;

the two layers of conductive films are arranged on one side of the light-transmitting film and are oppositely arranged at intervals;

each electrostriction particle is positioned between two conductive film layers and can realize volume deformation under the control of an electric field so as to adjust the light transmittance of the intelligent energy-saving film which realizes the light and shade color change through the control of the electric field to be 0.1-70%.

2. The intelligent energy-saving film for realizing brightness and darkness change through electric field control according to claim 1, wherein the electrostrictive particles are arranged in mutual abutment under the condition of no electric field application so as to prevent light rays on one side of the electrostrictive particles from being transmitted towards the other side of the electrostrictive particles; each of the electrostrictive particles contracts under an electric field condition to adjust the transmittance of light on one side of the electrostrictive particles toward the other side of the electrostrictive particles.

3. The intelligent energy-saving film for realizing bright and dark color change through electric field control as claimed in claim 1, wherein the volume deformation of the electrostrictive particles ranges from 10% to 300%.

4. The intelligent energy-saving film for realizing bright and dark colors through electric field control according to claim 2, wherein the particle size of the electrostrictive particles is 0.01-0.05 μm.

5. The intelligent energy-saving film for realizing brightness and darkness change through electric field control according to claim 1, wherein each layer of the light-transmitting film comprises any one of a PET film or a PC film.

6. The intelligent energy-saving film for realizing brightness and darkness change through electric field control according to claim 1, wherein each layer of said conductive film comprises indium tin oxide film.

7. The intelligent energy-saving film for realizing brightness and darkness change through electric field control according to claim 1, wherein the electrostrictive particles include either or both of electrostrictive graft elastomer and electroviscoelastic polymer.

8. The method for preparing the intelligent energy-saving film for realizing the change of brightness and darkness through the electric field control according to claim 1, wherein the preparation steps comprise:

s1, conductive film deposition: performing magnetron sputtering on an indium tin oxide film on one side of the light-transmitting film, standing and collecting to obtain a composite substrate film;

s2, coating preparation: coating an electrostrictive paint between the prepared composite substrate films, controlling the coating thickness of the electrostrictive paint to be 0.3-0.5 mm, and collecting to obtain a coating film;

s3, solidifying and standing: and (3) placing the coated coating film under an ultraviolet light condition for UV curing treatment, and standing for 20-30 h to obtain the intelligent energy-saving film capable of realizing light and shade color change through electric field control.

Technical Field

The application relates to the field of dimming films, in particular to an intelligent energy-saving film for realizing light and shade color change through electric field control and a preparation method thereof.

Background

With the continuous development of modern science and technology, the development of building technology and traffic science and technology, elements such as curtain wall, skylight have been merged into more and more to the building roofing, and its permeability has strengthened indoor outer visual interaction. Meanwhile, in vehicles represented by automobiles, tracks, airplanes and yachts, the use of windows can also bring comfortable natural light and natural landscape to people. However, the use of large-area glass curtain walls and windows increases the influence of solar heat radiation on the internal environment of buildings or vehicles, particularly in summer with strong radiation, sunlight not only causes glare and influences the visual comfort, but also increases the refrigeration energy consumption of the air conditioning system due to the high heat transfer and transparency of glass. Reversible color-changing glass is a solution to this problem, taking advantage of the property that the color of the glass changes under certain conditions, thereby changing the ratio of transmission and reflection of light.

The intelligent energy-saving film which realizes the light and shade color change through the electric field control is designed and compounded into the glass, so that the glass has good electrochromic performance, and is a common technical scheme of the existing electrochromic glass.

However, in the existing electrochromic material, because the structure of the intelligent energy-saving film for realizing the light and shade change through the electric field control is too complex, and the light transmittance performance cannot be well adjusted, the controllability of the electrochromic film in the light and shade adjustment is poor, and the light shading and heat insulation performance of the electrochromic film is reduced.

Disclosure of Invention

In order to overcome the defect that the shading and heat insulation performance of an electrochromic intelligent energy-saving film is reduced due to poor shading and heat insulation performance of the electrochromic intelligent energy-saving film realized through electric field control, the application provides an intelligent energy-saving film for realizing the shading and heat insulation through electric field control and a preparation method thereof, and the following technical scheme is adopted:

the first aspect provides an intelligent energy-saving film for realizing light and shade color change through electric field control, and adopts the following technical scheme:

an intelligent energy-saving film for realizing bright and dark color change through electric field control comprises: the two layers of light-transmitting films are arranged at intervals;

the two layers of conductive films are arranged on one side of the light-transmitting film and are oppositely arranged at intervals;

each electrostriction particle is positioned between two conductive film layers and can realize volume deformation under the control of an electric field so as to adjust the light transmittance of the intelligent energy-saving film which realizes the light and shade color change through the control of the electric field to be 0.1-70%.

Through adopting above-mentioned technical scheme, because this application adopts the electrostriction granule to fill to between the two-layer conductive film layer, under normal condition, because the electrostriction granule fills the back, light receives the blockking of electrostriction granule at the in-process that passes printing opacity membrane, leads to reflection or diffuse reflection to appear in light to isolated the transmission of light, reduced the luminousness of printing opacity membrane.

Secondly, when the volume shrinkage phenomenon takes place when the electrostriction granule can be under electric field state, because the volume of electrostriction granule reduces, thereby make light pass the in-process of printing opacity membrane, most light has passed the hole between the electrostriction granule after the shrink, the luminousness of printing opacity membrane has effectively been improved, so this application chooses for use the electrostriction granule to prepare the intelligent energy-saving film that realizes the light and shade colour through electric field control for the main material, effectively improve the not good defect of intelligent energy-saving film light and shade regulation performance that realizes the light and shade colour through electric field control, thereby the shading of the intelligent energy-saving film material that realizes the light and shade colour through electric field control, heat-proof quality have been improved.

Further, the electrostrictive particles are arranged in a mutually abutted mode under the condition of no electric field application so as to prevent light rays on one side of the electrostrictive particles from being transmitted to the other side of the electrostrictive particles; each of the electrostrictive particles contracts under an electric field condition to adjust the transmittance of light on one side of the electrostrictive particles toward the other side of the electrostrictive particles.

By adopting the technical scheme, the arrangement structure of the electrostrictive particles is further limited, so that the electrostrictive particles are easier to control during adjustment, a structural system of electrodeless control is formed, the defect of poor light and shade adjustment performance of the intelligent energy-saving film for realizing light and shade color change through electric field control is effectively overcome, and the shading and heat insulation performance of the intelligent energy-saving film is improved.

Further, the volume deformation range of the electrostrictive particles is 10% to 300%.

Through adopting above-mentioned technical scheme, because this application has optimized the deformation scope of electrostrictive particle, because the luminousness of printing opacity membrane is controlled by electrostrictive particle, so the electrostrictive particle after this application optimizes can effectively adjust its volumetric change range, effectively improves the not good defect of intelligent energy-conserving film light and shade regulation performance that realizes the light and shade through electric field control to improve and realized shading, the heat-proof quality of intelligent energy-conserving film material of light and shade through electric field control.

Furthermore, the particle size of the electrostrictive particles is 0.01-0.05 mu m.

By adopting the technical scheme, the particle size of the electrostrictive particles is further optimized, so that on one hand, the electrostrictive particles with the optimized particle size can be filled in a unit area in a larger quantity, and therefore, when the light transmittance of the intelligent energy-saving film is adjusted, a relatively accurate light and shade adjusting effect can be achieved; on the other hand, in the process of electrostriction, the electrostriction particles with the optimized particle size can optimize the structure formed by filling the electrostriction particles, so that the structural performance of the intelligent energy-saving film for realizing the light and shade change through electric field control is changed due to overlarge volume change of the electrostriction particles with large particle size, and the phenomenon of material agglomeration caused by the undersize particle size of the electrostriction particles is also prevented, thereby effectively improving the defect of poor light and shade adjustment performance of the intelligent energy-saving film for realizing the light and shade change through electric field control.

Further, each of the light-transmitting films includes any one of a PET film or a PC film.

Through adopting above-mentioned technical scheme, because this application has optimized the material of printing opacity membrane, through choosing the better and stronger film of mechanical properties of light transmissivity for use, not only improved the printing opacity performance of intelligent energy-conserving film, still had good mechanical strength and mechanical properties simultaneously.

Further, each of the conductive films includes an indium tin oxide film.

By adopting the technical scheme, because the indium tin oxide film is adopted as the conductive film material, the requirements of brightness adjustment of the intelligent energy-saving film on electric field conduction can be met, and the film has good light transmittance, so that the influence on the light transmittance of the intelligent energy-saving film is small.

Further, the electrostrictive particles include either or both of an electrostrictive graft elastomer and an electroviscoelastic polymer.

By adopting the technical scheme, the electrostrictive grafted elastomer and the electrostrictive viscoelastic polymer are preferably selected as main electrostrictive materials, and the two materials have good elastic properties, so that the material main body can be adjusted and selected according to the actual requirement on the deformation degree, the production cost is reduced, and the deformation performance of electrostrictive particles is improved.

In a second aspect, the present application provides a method for preparing an intelligent energy-saving thin film with a color changing between dark and bright through electric field control, which adopts the following technical scheme:

a preparation method of an intelligent energy-saving film for realizing bright and dark color change through electric field control comprises the following preparation steps:

s1, conductive film deposition: performing magnetron sputtering on an indium tin oxide film on one side of the light-transmitting film, standing and collecting to obtain a composite substrate film;

s2, coating preparation: coating an electrostrictive paint between the prepared composite substrate films, controlling the coating thickness of the electrostrictive paint to be 0.3-0.5 mm, and collecting to obtain a coating film;

s3, solidifying and standing: and (3) placing the coated coating film under an ultraviolet light condition for UV curing treatment, and standing for 20-30 h to obtain the intelligent energy-saving film capable of realizing light and shade color change through electric field control.

By adopting the technical scheme, in the process of preparing the intelligent energy-saving film for realizing bright and dark color change through electric field control, the electrostrictive coating is coated between the two layers of conductive films, and the intelligent energy-saving film with a good structure is formed through UV curing, so that the uniform dispersion performance of electrostrictive particles in the intelligent energy-saving film can be effectively improved, and the defect of poor intelligent energy-saving bright and dark adjusting performance can be effectively overcome.

In summary, the present application includes at least one of the following beneficial technical effects:

first, this application adopts the electrostriction granule to fill to between the two-layer conductive film layer, under normal condition, because the electrostriction granule fills the back, light receives the blockking of electrostriction granule at the in-process that passes the printing opacity membrane, leads to reflection or diffuse reflection to the transmission of light has been completely cut off, has reduced the luminousness of printing opacity membrane.

Secondly, when the volume shrinkage phenomenon takes place when the electrostriction granule can be under electric field state, because the volume of electrostriction granule reduces, thereby make light pass the in-process of printing opacity membrane, most light has passed the hole between the electrostriction granule after the shrink, the luminousness of printing opacity membrane has effectively been improved, so this application chooses for use the electrostriction granule to prepare the intelligent energy-saving film that realizes the light and shade colour through electric field control for the main material, effectively improve the not good defect of intelligent energy-saving film light and shade regulation performance that realizes the light and shade colour through electric field control, thereby the shading of the intelligent energy-saving film material that realizes the light and shade colour through electric field control, heat-proof quality have been improved.

Secondly, the application further limits the arrangement structure of the electrostrictive particles, so that the electrostrictive particles are easier to control during adjustment, a structural system of electrodeless control is formed, the defect of poor light and shade adjustment performance of the intelligent energy-saving film for realizing light and shade color change through electric field control is effectively overcome, and the light shading and heat insulation performance of the intelligent energy-saving film is improved.

And thirdly, in the process of preparing the intelligent energy-saving film for realizing bright and dark color change through electric field control, the electrostrictive coating is coated between the two layers of conductive films, and the intelligent energy-saving film with a good structure is formed through UV curing, so that the uniform dispersion performance of electrostrictive particles in the intelligent energy-saving film can be effectively improved, and the defect of poor light and dark adjustment performance of the intelligent energy-saving film can be effectively overcome.

Drawings

Fig. 1 is a schematic diagram of a light ray state when shading adjustment of an intelligent energy-saving film for realizing light and shade color change through electric field control according to an embodiment of the present application;

fig. 2 is a schematic view of a light ray state during light transmission adjustment of an intelligent energy-saving film for realizing light and dark color change through electric field control according to an embodiment of the present application.

Detailed Description

The present application will be described in further detail with reference to examples.

In the embodiment of the present application, the used apparatuses and raw materials and auxiliary materials are as follows, but not limited thereto:

a machine: a drying box, a stirrer, a vacuum freeze drying device, a U-3010 ultraviolet-visible-near infrared spectrophotometer of Hitachi company, a BM/BS3250-BM/BS3820 TPEE conductive elastomer produced by Suzhou Lebo plastic science and technology Limited company, and a U-3010 near infrared spectrophotometer of Hitachi company.

Preparation example

Preparation of electrostrictive coating

Weighing 125kg of water, 2kg of electrostrictive graft elastomer with the particle size of 0.01-0.05 mu m and the deformation range of 10-300%, 6kg of glycerol and 5kg of polyvinyl alcohol, mixing the water, the electrostrictive particles and the glycerol, adding and mixing the polyvinyl alcohol, heating to 80 ℃ at the speed of 2 ℃/min, preserving heat, heating and stirring, adjusting the solid content to 10%, and ultrasonically dispersing for 10min at 200W to obtain the electrostrictive coating.

Examples

Example 1

S1, conductive film deposition: carrying out magnetron sputtering on an indium tin oxide film on one side of the PET light-transmitting film, standing and collecting to obtain a composite substrate film;

s2, coating preparation: coating an electrostrictive paint between the prepared composite substrate films, controlling the coating thickness of the electrostrictive paint to be 0.3mm, and collecting to obtain a coating film;

s3, solidifying and standing: and (3) placing the coated coating film under an ultraviolet light condition for UV curing treatment, and standing for 20h to obtain the intelligent energy-saving film capable of realizing light and shade color change through electric field control.

Example 2

S1, conductive film deposition: carrying out magnetron sputtering on an indium tin oxide film on one side of the PET light-transmitting film, standing and collecting to obtain a composite substrate film;

s2, coating preparation: coating an electrostrictive paint between the prepared composite substrate films, controlling the coating thickness of the electrostrictive paint to be 0.4mm, and collecting to obtain a coating film;

s3, solidifying and standing: and (3) placing the coated coating film under an ultraviolet light condition for UV curing treatment, and standing for 25h to obtain the intelligent energy-saving film capable of realizing light and shade color change through electric field control.

Example 3

S1, conductive film deposition: carrying out magnetron sputtering on an indium tin oxide film on one side of the PET light-transmitting film, standing and collecting to obtain a composite substrate film;

s2, coating preparation: coating an electrostrictive paint between the prepared composite substrate films, controlling the coating thickness of the electrostrictive paint to be 0.5mm, and collecting to obtain a coating film;

s3, solidifying and standing: and (3) placing the coated coating film under an ultraviolet light condition for UV curing treatment, and standing for 30h to obtain the intelligent energy-saving film capable of realizing light and shade color change through electric field control.

Example 4: the intelligent energy-saving film for realizing light and shade color change through electric field control is different from the intelligent energy-saving film in the embodiment 1 in that an electrostrictive grafted elastomer in the embodiment 1 is replaced by an electroviscoelastic polymer, and the rest preparation steps and production conditions are the same as those in the embodiment 1.

Example 5: the intelligent energy-saving film for realizing light and shade color change through electric field control is different from the intelligent energy-saving film in the embodiment 1 in that a PC light-transmitting film is adopted to replace the PET light-transmitting film in the embodiment 1, and the rest preparation steps and production conditions are the same as those in the embodiment 1.

Performance test

The performance tests of examples 1 to 5 were performed, and the visible light transmittance and the power-on/power-off stability of the intelligent energy-saving film prepared in examples 1 to 5, which realizes the change of color between dark and light by electric field control, were tested.

Detection method/test method

Light transmittance properties:

the optical property of the film is tested by adopting a U-3010 ultraviolet-visible-near infrared spectrophotometer of Hitachi company, the testing range is 350-800 nm, the intelligent energy-saving film which is prepared by the method and realizes light and shade color change through electric field control is placed at 0-120V for stepless regulation treatment, the power on-off period of each time is set to be 5S, and a transmittance instrument is used for detecting the haze and visible light transmittance of a product after 220V and 60S power off after each power on-off time is 10 ten thousand.

The specific detection results are shown in the following tables 1-2:

TABLE 1 Intelligent energy-saving film haze detection meter for realizing bright and dark color change through electric field control

TABLE 2 Intelligent energy-saving film transmittance detection meter for realizing bright and dark color change through electric field control

Comparative example

Comparative example 1: the difference between the intelligent energy-saving film for realizing light and shade color change through electric field control and the embodiment 1 is that an elastomer SEBS is adopted to replace the electrostrictive grafted elastomer in the embodiment 1, and the rest of preparation steps and production conditions are the same as those in the embodiment 1.

Comparative example 2: the difference between the intelligent energy-saving film for realizing light and shade color change through electric field control and the embodiment 1 is that a TPEE conductive elastomer is adopted to replace the electrostrictive grafted elastomer in the embodiment 1, and the rest of the preparation steps and the production conditions are the same as those in the embodiment 1.

Comparative example 3: an intelligent energy-saving film for realizing light and shade color change through electric field control is different from the embodiment 1 in that an electrostrictive grafted elastomer with a deformation range of 50-100% is adopted to replace the electrostrictive grafted elastomer with a deformation range of 10-300% in the embodiment 1, and the rest preparation steps and production conditions are the same as those in the embodiment 1.

Comparative example 3: an intelligent energy-saving film for realizing light and shade color change through electric field control is different from the film in the embodiment 1 in that an electrostrictive grafted elastomer with the particle size of 0.005 mu m is adopted to replace the electrostrictive grafted elastomer in the embodiment 1, and the rest of the preparation steps and the production conditions are the same as those in the embodiment 1.

Comparative example 4: an intelligent energy-saving film for realizing light and shade color change through electric field control is different from the film in the embodiment 1 in that an electrostrictive grafted elastomer with the particle size of 0.08 mu m is adopted to replace the electrostrictive grafted elastomer in the embodiment 1, and the rest of the preparation steps and the production conditions are the same as those in the embodiment 1.

Performance test

And respectively carrying out performance tests on the comparative examples 1 to 4, and testing the visible light transmittance and the power-on and power-off stability of the intelligent energy-saving film which is prepared in the comparative examples 1 to 4 and realizes the light and dark color change through electric field control.

Detection method/test method

Light transmittance properties:

the optical property of the film is tested by adopting a U-3010 ultraviolet-visible-near infrared spectrophotometer of Hitachi company, the testing range is 350-800 nm, the intelligent energy-saving film which is prepared by the method and realizes light and shade color change through electric field control is placed at 0-120V for stepless regulation treatment, the power on-off period of each time is set to be 5S, and a transmittance instrument is used for detecting the haze and visible light transmittance of a product after 220V and 60S power off after each power on-off time is 10 ten thousand.

The specific detection results are shown in the following tables 3-4:

TABLE 3 Intelligent energy-saving film haze detection meter for realizing bright and dark color change through electric field control

TABLE 4 Intelligent energy-saving film transmittance detection meter for realizing bright and dark color change through electric field control

The performance test comparison in reference to tables 1-4 can find that:

(1) the performance comparison of the embodiments 1 to 3 shows that the intelligent energy-saving film which is prepared by the method and realizes the light and shade color change through the electric field control has good light and shade adjustment performance, which indicates that the technical scheme of the method and the device adopts the electrostrictive particles to fill the intelligent energy-saving film, and effectively improves the defect of poor light and shade adjustment performance.

(2) Compared with the examples 1-3 and the comparative examples 4-6, the intelligent energy-saving film which is prepared by the method and realizes the light and shade change through the electric field control has good use stability, and still has good light and shade adjusting performance after the power is turned on and off for 50W times.

(3) The embodiment 1-3 and the comparative example 1-2 are compared in performance, and further illustrate that the technical scheme of the application adopts the electrostrictive particles to fill the electrostrictive particles between the two conductive thin film layers, so that the defect of poor dimming performance of the intelligent energy-saving thin film for realizing dimming through electric field control is effectively overcome.

(4) Comparing the performances of the embodiment 1 and the comparative examples 3-4, which shows that the technical scheme of the application optimizes the particle size of the electrostrictive particles, on one hand, the electrostrictive particles with the optimized particle size can be filled in a larger quantity in a unit area, so that when the light transmittance of the intelligent energy-saving film with light and shade color changing controlled by an electric field is adjusted, a relatively accurate light and shade adjusting effect can be achieved; on the other hand, in the process of electrostriction, the electrostriction particles with the optimized particle size can optimize the structure formed by filling the electrostriction particles, so that the phenomenon that the change of the brightness of the intelligent energy-saving film for realizing the brightness change through electric field control is changed due to overlarge volume change of the electrostriction particles with large particle sizes in the process of extension and contraction is avoided, and the phenomenon that materials are agglomerated due to the fact that the particle size of the electrostriction particles is too small is also avoided, so that the defect that the brightness adjustment performance of the intelligent energy-saving film for realizing the brightness change through electric field control is poor is effectively overcome.

The implementation principle of the intelligent energy-saving film for realizing bright and dark color change through electric field control in the embodiment of the application is as follows:

(1) when indoor light does not need to be adjusted, the intelligent energy-saving film with light and shade changing colors is controlled by an electric field to be in a power-on state, and the electrostrictive particles are filled into the two layers of conductive films and are shrunk under the action of the electric field, so that in the process that the light passes through the intelligent energy-saving film, part of the light passes through the holes of the shrunk electrostrictive particles, and the light can enter the room, thereby realizing light transmission adjustment;

(2) when indoor light is darkened to need to be adjusted, the size of the expansion of the electrostrictive particles is changed by adjusting the change of the electrified electric field, and the light is blocked after the electrostrictive particles expand, so that the light is reflected or diffusely reflected, the transmission of the isolated light is reduced, the light transmittance of the intelligent energy-saving film is reduced, and the shading adjustment is realized.

The present embodiment is only for explaining the present application, and it is not limited to the present application, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present application.