A resin material, a liquid lens and a preparation method and application thereof

Abstract

The application relates to a resin material, a liquid lens and a preparation method and application thereof. The preparation raw material of the resin material comprises dihydroxy-p-phenylenedimethylene formadehyde, an aliphatic diamine and a modifier; the modifier comprises a fluorine-containing silane compound. The liquid lens of the application comprises a film material which is hydrophobic and superoleophilic under water, can realize long-term liquid lens zooming in a high-temperature environment, and thus guarantees high reliability of the liquid lens technology application.

Description

Technical Field

[0001] This invention relates to the field of electrowetting liquid lens technology, and more particularly to a resin material, a liquid lens, its preparation method and application. Background Technology

[0002] Currently, liquid lenses with autofocus and rapid continuous zoom capabilities have been commercialized and are widely used in consumer electronics, industrial imaging systems, and medical fields, becoming an important direction for the future development of vision systems. Liquid lenses based on the principle of electrowetting typically consist of two immiscible liquids of equal density: a conductive liquid and an insulating liquid. These two liquid phases remain in contact, forming a meniscus interface. By applying a voltage to change the interfacial energy between the hydrophobic film material and the conductive liquid, the wettability of the conductive liquid on the hydrophobic film surface is controlled, thereby inducing displacement of the conductive liquid. This alters the meniscus of the conductive and insulating liquids, ultimately achieving a variable focal length.

[0003] Due to the growth in industrial demand, liquid lenses still cannot meet the high-quality targets in harsh industrial environments, such as maintaining stability at high temperatures (≥60℃) for a long time (≥2 years). Analysis shows that the influencing factor is that the surface energy of the hydrophobic film material changes over a long period of time in high temperature and electric field environments.

[0004] Therefore, in order to achieve the high quality target of liquid lenses in the industrial market, it is necessary to select hydrophobic and underwater superoleophilic film layer materials with high chemical and physical stability, so as to ensure the long-term stability of liquid lenses. Summary of the Invention

[0005] To address the aforementioned technical problems, the present invention aims to provide a resin material, a liquid lens, a method for preparing the same, and its applications. The liquid lens of the present invention comprises a hydrophobic and underwater superoleophilic film material, enabling clear focusing even under prolonged high-temperature environments, thereby ensuring high reliability in the application of liquid lens technology.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] In a first aspect, the present invention provides a resin material, wherein the raw materials for preparing the resin material include dihydroxyterephthalaldehyde, an aliphatic diamine, and a modifier; the modifier includes fluorosilane compounds.

[0008] Liquid lenses are characterized by autofocus and rapid continuous zoom. However, when operating in high-temperature environments for extended periods, their excellent performance cannot be maintained stably. There are two main reasons for this: First, the hydrophobic film ages at high temperatures. In high-temperature environments, the polymer chains of the film material become more mobile, altering the intermolecular interactions. Second, the hydrophobic film becomes polarized by molecules and ions. Under the influence of an electric field, the hydrophobic film is in prolonged contact with the conductive liquid. The polymer chains of the film material form hydrogen bonds with the polar components in the conductive liquid or ionic bonds with salts, leading to changes in the internal structure of the material. These factors cause changes in the solid-liquid interfacial tension between the conductive liquid and the hydrophobic film, resulting in the failure of the liquid lens under long-term high-temperature operation, manifesting as blurred focus.

[0009] In this invention, based on the chain structure of a one-dimensional covalent organic porous polymer, polymer chains are formed by covalent bonds and three-dimensional ordered assembly is achieved by non-covalent interactions between chains (such as hydrogen bonds), thereby enhancing the physical and chemical stability of the hydrophobic film and improving the high-temperature stability of the liquid lens.

[0010] Preferably, the dihydroxyterephthalaldehyde includes any one or a combination of at least two of 2,5-dihydroxyterephthalaldehyde, 2,3-dihydroxyterephthalaldehyde, or 2,6-dihydroxyterephthalaldehyde, with 2,5-dihydroxyterephthalaldehyde being more preferred.

[0011] Preferably, the aliphatic diamine includes any one or a combination of at least two of ethylenediamine, 1,3-propanediamine, 1,4-butanediamine, 1,6-hexanediamine, or 1,10-decanediamine.

[0012] Preferably, the modifier comprises a compound with the following formula:

[0013] (1) (2) or (3) Any one or at least two of the following;

[0014] Among them, R, R1, R2, R3 and R4 may be the same or different, and each is independently selected from C1-C20 aliphatic alkyl groups.

[0015] Preferably, the modifier comprises any one or a combination of at least two of trifluoropropylmethyldimethoxysilane, perfluorooctylethyltrimethoxysilane, perfluorohexylethyltriethoxysilane, trifluoropropylmethyldichlorosilane, or hexadecyltriethoxysilane.

[0016] In this invention, based on the hydrophobicity of fluorine compounds and long-chain alkane compounds, and the oleophilicity of silane compounds, fluorosilanes or long-chain silanes are used to modify the above-mentioned covalent organic polymers, so that the film has hydrophobic and underwater superoleophilic properties, ensuring the good zoom performance of the liquid lens.

[0017] Preferably, the molar ratio of dihydroxyterephthalaldehyde to aliphatic diamine is 1:(0.9-1.1), for example, it can be 1:0.95, 1:0.98, 1:1, 1:1.05 or 1:1.08, etc.

[0018] Preferably, the molar ratio of dihydroxyterephthalaldehyde to the modifier is 1:(0.9-1.1), for example, it can be 1:0.95, 1:0.98, 1:1, 1:1.05 or 1:1.08, etc.

[0019] Preferably, the molar ratio of the aliphatic diamine to the modifier is 1:(0.9-1.1), for example, it can be 1:0.95, 1:0.98, 1:1, 1:1.05 or 1:1.08.

[0020] In a second aspect, the present invention provides a method for preparing a resin material as described in the first aspect, the method comprising the following steps:

[0021] (1) Dihydroxyterephthalaldehyde, aliphatic diamine and modifier are mixed in a solvent to obtain a mixture;

[0022] (2) Add acetic acid to the mixture and react at 25-120°C (e.g., 50°C, 70°C, 90°C, 100°C or 110°C, etc.) for 12-96 h (e.g., 20 h, 40 h, 50 h, 70 h or 90 h, etc.), filter, and obtain the resin material.

[0023] Preferably, the reaction temperature in step (2) is 70-90°C, for example, it can be 75°C, 78°C, 80°C, 85°C or 88°C.

[0024] Preferably, the reaction time in step (2) is 12-36 h, for example, it can be 15 h, 20 h, 24 h, 30 h or 35 h.

[0025] Preferably, the solvent comprises tert-butanol and / or 1,4-dioxane.

[0026] Preferably, the reaction in step (2) is carried out under nitrogen protection.

[0027] Thirdly, the present invention provides a liquid lens, the liquid lens comprising a hydrophobic film, the raw materials for preparing the hydrophobic film comprising the resin material as described in the first aspect.

[0028] Preferably, the liquid lens further includes an insulating film, an upper transparent substrate, a lower transparent substrate, a fluid chamber, an upper electrode, and a lower electrode; the fluid chamber is disposed between the upper transparent substrate and the lower transparent substrate; the upper transparent substrate is fixed to the upper electrode, and the lower transparent substrate is fixed to the lower electrode; the fluid chamber is filled with an insulating liquid and a conductive liquid, and a liquid-liquid interface is formed between the two phases of the fluid liquid and the conductive liquid; the lower electrode and the lower transparent substrate are coated with an insulating film, and a hydrophobic film is coated on the insulating film, and a three-phase interface is formed at the junction of the hydrophobic film and the two liquid phases.

[0029] Preferably, the thickness of the hydrophobic film is 20-500 nm, for example, it can be 50 nm, 100 nm, 200 nm, 300 nm or 400 nm.

[0030] Preferably, the insulating liquid comprises any one or a combination of at least two of aliphatic silicon, aromatic silicon, aliphatic germanium, aromatic germanium, aliphatic alkyl compounds, or aromatic compounds.

[0031] Preferably, the density of the insulating liquid is 0.700-1.300 g / cm³. 3 For example, it could be 0.800 g / cm³ 3 0.900 g / cm 3 1.000 g / cm 3 1.100 g / cm 3 Or 1.200 g / cm 3 wait.

[0032] Preferably, the refractive index of the insulating liquid is ≥1.400 nD20, for example, it can be 1.450 nD20, 1.500 nD20, 1.550 nD20, 1.600 nD20 or 1.650 nD20, etc.

[0033] Preferably, the number-average molecular weight of the insulating liquid is ≤800 g / mol, for example, it can be 300 g / mol, 400 g / mol, 500 g / mol, 600 g / mol or 700 g / mol, etc.

[0034] Preferably, the boiling point of the insulating liquid is ≥150℃, for example, it can be 155℃, 160℃, 165℃, 170℃ or 175℃, etc.

[0035] Preferably, the conductive liquid includes any one or a combination of at least two of water, ethylene glycol, or propylene glycol.

[0036] Preferably, the freezing point of the conductive liquid is ≤-30℃, for example, it can be -35℃, -40℃, -45℃, -50℃ or -55℃, etc.

[0037] Preferably, the boiling point of the conductive liquid is ≥120℃, for example, it can be 125℃, 130℃, 135℃, 140℃ or 145℃, etc.

[0038] Preferably, the conductive liquid further includes an auxiliary agent, which includes inorganic salts and / or organic salts.

[0039] Preferably, the inorganic salt includes sodium chloride and / or sodium bromide.

[0040] Preferably, the organic salt comprises any one or a combination of at least two of potassium acetate, cesium formate, or cesium acetate.

[0041] Preferably, the mass percentage of the auxiliary agent in the conductive liquid is 0.1%-5%, for example, it can be 0.5%, 1%, 2%, 3% or 4%, etc.

[0042] Preferably, the density difference between the conductive liquid and the insulating liquid is less than 0.01 g / cm³. 3 For example, it could be 0.001 g / cm³. 3 0.002 g / cm 3 0.005 g / cm 3 0.006 g / cm 3 Or 0.008 g / cm 3 wait.

[0043] Preferably, the method for preparing the hydrophobic membrane includes the following steps:

[0044] The resin material as described in the first aspect is dissolved in a perfluorinated diluent, dropped onto an insulating film, spin-coated, and cured at 160-180°C (e.g., 165°C, 168°C, 170°C, 175°C, or 178°C, etc.) for 15-25 min (e.g., 17 min, 19 min, 20 min, 22 min, or 24 min, etc.) to obtain the hydrophobic film.

[0045] Preferably, the mass ratio of the resin material to the perfluorinated diluent is 1:(2-100), for example, it can be 1:10, 1:20, 1:50, 1:70 or 1:90, etc.

[0046] Preferably, the spin coating speed is 1000-12000 rpm, for example, it can be 2000 rpm, 4000 rpm, 6000 rpm, 8000 rpm or 10000 rpm.

[0047] Preferably, the spin coating time is 5-120 s, for example, it can be 20 s, 40 s, 50 s, 60 s or 100 s.

[0048] Preferably, the curing temperature is 150-200℃, for example, it can be 160℃, 170℃, 175℃, 180℃ or 190℃.

[0049] Preferably, the curing time is 5-60 min, for example, it can be 10 min, 20 min, 30 min, 40 min or 50 min.

[0050] Preferably, the insulating film comprises a linear polymer of p-xylene.

[0051] Preferably, the xylene linear polymer includes any one or a combination of at least two of parylene C, parylene D, parylene N, parylene AF-4, parylene HT, or parylene VT-4.

[0052] Fourthly, the present invention provides an application of the liquid lens as described in the third aspect in a camera, mobile phone, endoscope, barcode scanner, telemetry meter or dental camera.

[0053] Compared with the prior art, the present invention has at least the following beneficial effects:

[0054] (1) The present invention provides a liquid lens with high reliability, wherein the hydrophobic film is an underwater superoleophilic film with good hydrophobicity, underwater oleophilicity and stability.

[0055] (2) The liquid lens containing an underwater superoleophilic film obtained by the present invention has an optical power and voltage that remain almost unchanged in a long-term (≥2 years) and high-temperature (≥60℃) working environment, thereby improving the zoom stability of the liquid lens and broadening the application field of liquid lens technology. Attached Figure Description

[0056] Figure 1 This is a schematic diagram of the liquid lens structure of the present invention;

[0057] Wherein, 11 is the upper transparent substrate, 10 is the upper transparent substrate adhesive material, 30 is the upper electrode, 52 is the lower electrode, 51 is the insulating film and hydrophobic film, 64 is the lower transparent substrate adhesive material, 12 is the lower transparent substrate, A or B is the two-phase liquid interface, 41 is the conductive liquid, and 42 is the insulating liquid.

[0058] Figure 2 This is a graph showing the change in refractive power of the liquid lens prepared by the hydrophobic film in Embodiment 1 of the present invention relative to the applied voltage.

[0059] Figure 3 This is a graph showing the change in refractive power of the liquid lens prepared by the hydrophobic film in Embodiment 2 of the present invention relative to the applied voltage.

[0060] Figure 4 This is a graph showing the change in refractive power of the liquid lens prepared by the hydrophobic film in Embodiment 3 of the present invention relative to the applied voltage.

[0061] Figure 5 This is a graph showing the change in refractive power of the liquid lens prepared by the hydrophobic film in Embodiment 4 of the present invention relative to the applied voltage.

[0062] Figure 6 This is a graph showing the change in refractive power of the liquid lens prepared by the hydrophobic film in Embodiment 5 of the present invention relative to the applied voltage.

[0063] Figure 7 This is a graph showing the change in refractive power of the liquid lens prepared by the hydrophobic film of Comparative Example 1 of the present invention relative to the applied voltage.

[0064] Figure 8 This is a graph showing the change in refractive power of the liquid lens prepared by the hydrophobic film of Comparative Example 2 of the present invention relative to the applied voltage. Detailed Implementation

[0065] The technical solution of the present invention will be further described below with reference to the accompanying drawings and specific embodiments. However, the following examples are merely simplified examples of the present invention and do not represent or limit the scope of protection of the present invention. The scope of protection of the present invention is determined by the claims.

[0066] The sources of some of the raw materials used in the following embodiments and comparative examples of the present invention are as follows:

[0067] The perfluorinated diluent is designated FS 40.

[0068] Example 1

[0069] This embodiment provides a hydrophobic membrane and its preparation method. The preparation method of the hydrophobic membrane includes the following steps:

[0070] 2,5-Dihydroxyterephthalaldehyde (0.3 mmol, 49.8 mg), hexamethylenediamine (0.3 mmol, 34.8 mg), trifluoropropylmethyldimethoxysilane (0.3 mmol, 60.3 mg), tert-butanol (1 mL), and 1,4-dioxane (2 mL) were sequentially added to an Erlenmeyer flask. The mixture was sonicated to ensure homogeneity, and the solution was poured into a high-temperature reactor. Then, 0.15 mL of 3M aqueous acetic acid solution was added. The reactor was sealed under a nitrogen atmosphere and placed in an oven at 80°C for 24 h. After the reaction was complete, the mixture was cooled to room temperature, centrifuged, filtered, washed with anhydrous ethanol, and dried to obtain the resin material.

[0071] The above-mentioned resin material was dissolved in a perfluorinated diluent at a mass ratio of 1:50. A certain amount of the diluted solution was dropped onto the insulating film, spin-coated, and cured to obtain the hydrophobic film. The spin-coating speed was 8000 rpm, the spin time was 10 s, the curing temperature was 160℃, and the curing time was 30 min.

[0072] Example 2

[0073] This embodiment provides a hydrophobic membrane and its preparation method. The preparation method of the hydrophobic membrane includes the following steps:

[0074] 2,5-Dihydroxyterephthalaldehyde (0.3 mmol, 49.8 mg), hexamethylenediamine (0.3 mmol, 34.8 mg), perfluorooctylethyltrimethoxysilane (0.3 mmol, 153 mg), tert-butanol (1.5 mL), and 1,4-dioxane (3 mL) were sequentially added to an Erlenmeyer flask. The mixture was sonicated to ensure homogeneity, and the solution was poured into a high-temperature reactor. Then, 0.15 mL of 3M aqueous acetic acid solution was added. The reactor was sealed under a nitrogen atmosphere and placed in an oven at 80°C for 24 hours. After the reaction was complete, the mixture was cooled to room temperature, centrifuged, filtered, washed with anhydrous ethanol, and dried to obtain the resin material.

[0075] The above-mentioned resin material was dissolved in a perfluorinated diluent at a mass ratio of 1:60. A certain amount of the diluted solution was dropped onto the insulating film, spin-coated, and cured to obtain the hydrophobic film. The spin-coating speed was 8000 rpm, the spin time was 10 s, the curing temperature was 170℃, and the curing time was 20 min.

[0076] Example 3

[0077] This embodiment provides a hydrophobic membrane and its preparation method. The preparation method of the hydrophobic membrane includes the following steps:

[0078] 2,5-Dihydroxyterephthalaldehyde (0.3 mmol, 49.8 mg), hexamethylenediamine (0.3 mmol, 34.8 mg), perfluorohexylethyltriethoxysilane (0.3 mmol, 175 mg), tert-butanol (2 mL), and 1,4-dioxane (4 mL) were sequentially added to an Erlenmeyer flask. The mixture was sonicated to ensure homogeneity, and the solution was poured into a high-temperature reactor. Then, 0.20 mL of 3M aqueous acetic acid solution was added. The reactor was sealed under a nitrogen atmosphere and placed in an oven at 80°C for 24 h. After the reaction was complete, the mixture was cooled to room temperature, centrifuged, filtered, washed with anhydrous ethanol, and dried to obtain the resin material.

[0079] The above-mentioned resin material was dissolved in a perfluorinated diluent at a mass ratio of 1:80. A certain amount of the diluted solution was dropped onto the insulating film, spin-coated, and cured to obtain the hydrophobic film. The spin-coating speed was 8000 rpm, the spin time was 10 s, the curing temperature was 180℃, and the curing time was 15 min.

[0080] Example 4

[0081] This embodiment provides a hydrophobic membrane and its preparation method. The preparation method of the hydrophobic membrane includes the following steps:

[0082] 2,5-Dihydroxyterephthalaldehyde (0.3 mmol, 49.8 mg), hexamethylenediamine (0.3 mmol, 34.8 mg), trifluoropropylmethyldichlorosilane (0.3 mmol, 63.3 mg), tert-butanol (1 mL), and 1,4-dioxane (2 mL) were sequentially added to an Erlenmeyer flask. The mixture was sonicated to ensure homogeneity, and the solution was poured into a high-temperature reactor. Then, 0.15 mL of 3M aqueous acetic acid solution was added. The reactor was sealed under a nitrogen atmosphere and placed in an oven at 80°C for 24 hours. After the reaction was complete, the mixture was cooled to room temperature, centrifuged, filtered, washed with anhydrous ethanol, and dried to obtain the resin material.

[0083] The above-mentioned resin material was dissolved in a perfluorinated diluent at a mass ratio of 1:50. A certain amount of the diluted solution was dropped onto the insulating film, spin-coated, and cured to obtain the hydrophobic film. The spin-coating speed was 8000 rpm, the spin time was 10 s, the curing temperature was 200℃, and the curing time was 10 min.

[0084] Example 5

[0085] This embodiment provides a hydrophobic membrane and its preparation method. The preparation method of the hydrophobic membrane includes the following steps:

[0086] 2,5-Dihydroxyterephthalaldehyde (0.3 mmol, 49.8 mg), hexamethylenediamine (0.3 mmol, 34.8 mg), hexadecyltriethoxysilane (0.3 mmol, 116 mg), tert-butanol (2 mL), and 1,4-dioxane (4 mL) were sequentially added to an Erlenmeyer flask. The mixture was sonicated to ensure homogeneity, and the solution was poured into a high-temperature reaction vessel. Then, 0.20 mL of 3M aqueous acetic acid solution was added. The reaction vessel was sealed under a nitrogen atmosphere and placed in an oven at 80°C for 24 hours. After the reaction was complete, the mixture was cooled to room temperature, centrifuged, filtered, washed with anhydrous ethanol, and dried to obtain the resin material.

[0087] The above-mentioned resin material was dissolved in a perfluorinated diluent at a mass ratio of 1:80. A certain amount of the diluted solution was dropped onto the insulating film, spin-coated, and cured to obtain the hydrophobic film. The spin-coating speed was 8000 rpm, the spin time was 10 s, the curing temperature was 200℃, and the curing time was 10 min.

[0088] Comparative Example 1

[0089] This comparative example provides a hydrophobic membrane and its preparation method, which differs from Example 1 only in that the amount of trifluoropropylmethyldimethoxysilane used is 0 mmol.

[0090] Comparative Example 2

[0091] This comparative example provides a hydrophobic membrane and its preparation method, which differs from Example 1 only in that the amount of hexamethylenediamine used is 0 mmol.

[0092] The structure of the liquid lens of the present invention is as follows: Figure 1 As shown. Among them, 11 is the upper transparent substrate, 30 is the upper electrode, 52 is the lower electrode, 51 is the insulating film and hydrophobic film, 12 is the lower transparent substrate, 10 is the upper transparent substrate adhesive material, 64 is the lower transparent substrate adhesive material, A or B is the two-phase liquid interface, 41 is the conductive liquid, and 42 is the insulating liquid.

[0093] Experimental conditions: 85℃, 60V constant voltage operation for 30 days.

[0094] The test results of the water droplet angle and the underwater oil droplet angle are shown in Table 1.

[0095] Table 1

[0096]

[0097] The results of the change in refractive power of the liquid lenses prepared with hydrophobic films in Examples 1-5 and Comparative Examples 1-2 relative to the applied voltage are as follows: Figure 2-8 As shown.

[0098] The test results show that:

[0099] (1) As can be seen from Examples 1-5, the liquid lens of the present invention contains a hydrophobic and underwater superoleophilic film material, which can achieve clear focusing of the liquid lens in a high-temperature environment for a long time, thereby ensuring the high reliability of the application of liquid lens technology.

[0100] (2) By comparing Example 1 with Comparative Examples 1-2, it can be seen that if no modifier or aliphatic diamine is added to the raw materials for preparing the resin material, the performance and stability of the liquid lens obtained will be significantly worse.

[0101] In summary, by introducing a hydrophobic and underwater superoleophilic film material into the liquid lens, this invention enables clear focusing of the liquid lens in a high-temperature environment over a long period of time, thereby ensuring the high reliability of the liquid lens technology application.

[0102] The applicant declares that the above description is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Those skilled in the art should understand that any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention fall within the protection and disclosure scope of the present invention.

Claims

1. A resin material, characterized in that, The raw materials for preparing the resin material include dihydroxyterephthalaldehyde, aliphatic diamine, and a modifier; the modifier includes fluorinated silane compounds.

2. The resin material according to claim 1, characterized in that, The dihydroxyterephthalaldehyde includes any one or a combination of at least two of 2,5-dihydroxyterephthalaldehyde, 2,3-dihydroxyterephthalaldehyde, or 2,6-dihydroxyterephthalaldehyde, with 2,5-dihydroxyterephthalaldehyde being more preferred.

3. The resin material according to claim 1 or 2, characterized in that, The aliphatic diamine includes any one or a combination of at least two of ethylenediamine, 1,3-propanediamine, 1,4-butanediamine, 1,6-hexanediamine, or 1,10-decanediamine.

4. The resin material according to any one of claims 1-3, characterized in that, The modifier includes compounds with the following formula: (1) (2) or (3) Any one or at least two of the following; Among them, R, R1, R2, R3 and R4 may be the same or different, and each is independently selected from C1-C20 aliphatic alkyl groups; Preferably, the modifier comprises any one or a combination of at least two of trifluoropropylmethyldimethoxysilane, perfluorooctylethyltrimethoxysilane, perfluorohexylethyltriethoxysilane, trifluoropropylmethyldichlorosilane, or hexadecyltriethoxysilane.

5. The resin material according to any one of claims 1-4, characterized in that, The molar ratio of dihydroxyterephthalaldehyde to aliphatic diamine is 1:(0.9-1.1); Preferably, the molar ratio of dihydroxyterephthalaldehyde to the modifier is 1:(0.9-1.1); Preferably, the molar ratio of the aliphatic diamine to the modifier is 1:(0.9-1.1).

6. A method for preparing a resin material as described in any one of claims 1-5, characterized in that, The preparation method includes the following steps: (1) Dihydroxyterephthalaldehyde, aliphatic diamine and modifier are mixed in a solvent to obtain a mixture; (2) Add acetic acid to the mixture, react at 25-120℃ for 12-96 h, filter, and obtain the resin material; Preferably, the solvent comprises tert-butanol and / or 1,4-dioxane; Preferably, the reaction in step (2) is carried out under nitrogen protection.

7. A liquid lens, characterized in that, The liquid lens includes a hydrophobic film, and the raw materials for preparing the hydrophobic film include the resin material as described in any one of claims 1-5.

8. The liquid lens according to claim 7, characterized in that, The liquid lens also includes an insulating film, an upper transparent substrate, a lower transparent substrate, a fluid chamber, an upper electrode, and a lower electrode; The fluid chamber is disposed between the upper transparent substrate and the lower transparent substrate; The upper transparent substrate is fixed to the upper electrode, and the lower transparent substrate is fixed to the lower electrode; The fluid chamber is filled with an insulating liquid and a conductive liquid, and a liquid-liquid interface is formed between the two phases of the fluid liquid and the conductive liquid. An insulating film is coated on the lower electrode and the lower transparent substrate, and a hydrophobic film is coated on the insulating film. The hydrophobic film forms a three-phase interface at the junction of the two-phase liquid.

9. The liquid lens according to claim 7 or 8, wherein the method for preparing the hydrophobic film comprises the following steps: The resin material as described in any one of claims 1-5 is dissolved in a perfluorinated diluent, dropped onto an insulating film, and cured at 160-180°C for 15-25 min to obtain the hydrophobic film.

10. An application of a liquid lens as described in any one of claims 7-9 in a camera, mobile phone, endoscope, barcode scanner, telemetry meter, or dental camera.

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