Ice shaped developer, method of preparation and use

Abstract

This application discloses an ice-shaped developer, its preparation method, and its application, relating to the measurement of ice shape in wind tunnels. The raw materials for the ice-shaped developer include polydimethylsiloxane-modified titanium dioxide and ethyl acetate; the mass ratio of the polydimethylsiloxane-modified titanium dioxide to ethyl acetate is 1:6 to 1:10; the particle size of the polydimethylsiloxane-modified titanium dioxide is 30 nm to 100 nm. The ice-shaped developer provided in this application exhibits good wettability on ice surfaces and can form a satisfactory coating even on complex ice surfaces. Furthermore, the ice-shaped developer of this application is physically stable and can be stored for more than 15 days after preparation, during which time the developer dispersion remains stable and its performance does not degrade.

Description

Technical Field

[0001] This application relates to the field of ice shape measurement in wind tunnels, and more particularly to an ice shape developer, its preparation method, and its application. Background Technology

[0002] In ice wind tunnel tests, the geometric profile of the ice formation is one of the most important test data, serving as a key parameter for selecting critical ice shapes, evaluating the performance of anti-icing and de-icing systems, and developing ice models. With the continuous development of ice shape measurement methods and technologies, optical non-contact measurement methods (laser three-dimensional scanning technology) have emerged and become one of the important means to obtain high-precision three-dimensional ice shape data.

[0003] Laser 3D scanning technology, with its non-contact measurement advantage, can reconstruct the 3D structure of ice shapes without damaging their original structure. It also boasts high measurement accuracy and fast data acquisition speed, making it a crucial technology for ice shape measurement in ice wind tunnel experiments. However, it faces significant technical challenges in practical applications: accumulated ice (especially open ice) has strong laser transmission characteristics. When the laser line of the 3D scanning equipment illuminates the ice surface, the laser line penetrates the ice, resulting in no reflection signal or a weak and chaotic reflection signal, making it difficult to trigger triangulation calculations. This ultimately leads to blurred ice shape boundaries, insufficient 3D reconstruction accuracy, and failure to meet the quality requirements of ice shape acquisition data.

[0004] To address the interference of ice on laser transmission, the industry commonly employs a technique of coating the specimen surface with an ice-shaped developer. This developer enhances the diffuse reflectivity of the ice surface, ensuring that the pixel coordinates of the entire laser line can be extracted, thereby improving the measurement accuracy of laser 3D scanning. However, existing ice-shaped developers have the following drawbacks in practical applications, limiting their applicability in ice wind tunnel testing: Firstly, the coating uniformity is poor on complex ice surfaces. In ice wind tunnel tests, existing developers have insufficient wettability on ice surfaces. After coating, they tend to accumulate in the depressions of the ice surface, and the coating is too thin or even exposed in the protrusions. This results in uneven thickness of the developing coating, which not only fails to uniformly enhance the laser diffuse reflection effect, but may also change the original contour of the local ice shape due to coating accumulation, affecting the accuracy of the measurement.

[0005] Secondly, it suffers from poor storage stability and requires immediate use after preparation. Existing ice-form developers have poor component compatibility, easily agglomerating and settling, which can clog nozzles and affect work efficiency. Once prepared, the developer must be used as soon as possible, and the container must be frequently shaken during use to maintain its dispersion. When shaking stops, existing ice-form developers quickly exhibit titanium dioxide particle aggregation and precipitation, completing the precipitation process in a very short time. If stored for an extended period, the titanium dioxide particles agglomerate severely and adhere to the bottom of the container, significantly reducing the developer's performance. This defect causes numerous inconveniences for 3D scanning in ice wind tunnels: on the one hand, preparing the developer before each scan is cumbersome; on the other hand, unused prepared developer must be discarded, resulting in waste.

[0006] In summary, existing ice-shaped developers suffer from technical defects such as insufficient ice surface wettability, poor component compatibility, and poor storage stability. Therefore, there is an urgent need to develop an ice-shaped developer with good ice surface wettability, good component compatibility, and high storage stability to improve the quality and efficiency of ice-shaped 3D scanning. Summary of the Invention

[0007] This application discloses an ice-shaped developer, its preparation method, and its application, in order to solve the technical problems of poor component compatibility, poor storage stability, and insufficient wettability on ice surfaces in existing ice-shaped developers.

[0008] To solve the above problems, this application adopts the following technical solution: In a first aspect, embodiments of this application provide an ice-shaped developer, the raw materials of which include polydimethylsiloxane-modified titanium dioxide and ethyl acetate; the mass ratio of the polydimethylsiloxane-modified titanium dioxide to ethyl acetate is 1:6 to 1:10; and the particle size of the polydimethylsiloxane-modified titanium dioxide is 30 nm to 100 nm.

[0009] Secondly, embodiments of this application provide a method for preparing the above-mentioned ice-shaped developer, comprising: weighing each raw material according to the specified ratio, and dispersing polydimethylsiloxane-modified titanium dioxide in ethyl acetate. Mix thoroughly to obtain a stable dispersion, which is the ice-shaped developer. When the raw material contains a wetting and leveling agent, after the above dispersion is prepared, the wetting and leveling agent is added and mixed evenly to obtain the ice-shaped developer.

[0010] Thirdly, embodiments of this application provide an application of the ice-shaped developer prepared by the above preparation method for measuring the three-dimensional structure of ice in an ice wind tunnel experiment.

[0011] The technical solutions adopted in the embodiments of this application can achieve the following benefits: (1) The ice-shaped developer provided in this application can form a more uniform coating on complex ice surfaces because: the non-polar characteristics of the side methyl group of polydimethylsiloxane endow the modified titanium dioxide surface with low surface energy, which makes it spread more evenly in the depressions and protrusions of the ice surface, improves the problem of local aggregation or excessively thin coating, and better characterizes the original geometric contour of the ice shape.

[0012] (2) The ice-shaped developer provided in this application can effectively reduce the risk of nozzle clogging and can be stored stably for at least 15 days without the need for immediate preparation. Its dispersion stability is mainly due to the synergistic effect between the components: ① The polydimethylsiloxane modified layer transforms the titanium dioxide from a strongly polar hydrophilic surface to a weakly polar hydrophobic surface, which is similar in polarity to ethyl acetate and has good interfacial compatibility; ② Polydimethylsiloxane forms stable Si-O-Ti covalent bonds with the surface of titanium dioxide, and the modified layer is not easy to fall off, so that the dispersion state can be stable and durable; ③ Adjusting the solid content of the developer reduces the proportion of titanium dioxide dispersed particles, further reducing the possibility of titanium dioxide particles clogging the nozzle. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 (a) is a diagram showing the state of the ice-shaped developer in Example 1 after 20 seconds; Figure 1 (b) is a diagram showing the state of the ice-shaped developer in Comparative Example 1 after 20 seconds; Figure 2 (a) is a diagram showing the state of the ice-shaped developer in Example 1 after 40 seconds; Figure 2 (b) is a diagram showing the state of the ice-shaped developer in Comparative Example 1 after 40 seconds. Figure 3 (a) is a diagram showing the state of the ice-shaped developer in Example 1 after 5 minutes of placement; Figure 3 (b) is a diagram showing the state of the ice-shaped developer in Comparative Example 1 after 5 minutes of incubation; Figure 4 (a) is a diagram showing the state of the ice-shaped developer in Example 1 after 24 hours of storage; Figure 4 (b) is a diagram showing the state of the ice-shaped developer in Example 2 after 24 hours of storage; Figure 4 (c) is a diagram showing the state of the ice-shaped developer in Example 4 after 24 hours of storage; Figure 5 (a) is a diagram showing the state of the ice-shaped developer in Example 1 after 48 hours of storage; Figure 5 (b) is a diagram showing the state of the ice-shaped developer in Example 2 after 48 hours of storage; Figure 5 (c) is a diagram showing the state of the ice-shaped developer in Example 4 after 48 hours of storage; Figure 6 (a) is a diagram showing the state of the ice-shaped developer in Example 1 after 96 hours of storage; Figure 6 (b) is a diagram showing the state of the ice-shaped developer in Example 2 after 96 hours of storage; Figure 6 (c) is a diagram showing the state of the ice-shaped developer in Example 4 after 96 hours of storage; Figure 7 (a) is a diagram showing the state of the ice-shaped developer in Example 2 after 7 days of storage; Figure 7 (b) is a diagram showing the state of the ice-shaped developer in Example 2 after 10 days of storage; Figure 7 (c) is a diagram showing the state of the ice-shaped developer in Example 2 after 15 days of storage; Figure 8 (a) is a diagram showing the state of the ice-shaped developer in Example 4 after 7 days of storage; Figure 8 (b) is a diagram showing the state of the ice-shaped developer in Example 4 after 10 days of storage; Figure 8 (c) is a diagram showing the state of the ice-shaped developer in Example 4 after 15 days of storage; Figure 9 (a) is a diagram showing the development effect of the ice-shaped developer sprayed in Comparative Example 1; Figure 9 (b) is a diagram showing the development effect of the ice-shaped developer sprayed in Example 1; Figure 9 (c) is a development effect diagram of the ice-shaped developer sprayed in Example 2. Detailed Implementation

[0015] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions of this application will be described in detail below. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. Based on the embodiments in this application, all other implementation methods obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0016] In a first aspect, this application provides an ice-shaped developer, the raw materials of which include polydimethylsiloxane-modified titanium dioxide and ethyl acetate; the mass ratio of the polydimethylsiloxane-modified titanium dioxide to ethyl acetate is 1:6 to 1:10; and the particle size of the polydimethylsiloxane-modified titanium dioxide is 30 nm to 100 nm.

[0017] In some embodiments, the mass ratio of the polydimethylsiloxane-modified titanium dioxide to ethyl acetate is 1:6 to 1:8.

[0018] In some embodiments, the mass ratio of the polydimethylsiloxane-modified titanium dioxide to ethyl acetate is 1:6.

[0019] In some embodiments, the raw materials of the ice-shaped developer further include a wetting and leveling agent. The mass-to-volume ratio of the polydimethylsiloxane-modified titanium dioxide to the wetting and leveling agent is 3:0.1 to 3:0.2, with the polydimethylsiloxane-modified titanium dioxide measured in grams and the wetting and leveling agent measured in milliliters. The wetting and leveling agent builds an interfacial transition bridge between the titanium dioxide coating layer and the system, thereby achieving the functions of wetting, leveling, and assisting dispersion. This effectively improves the uniformity of the ice-shaped developer's spread and overall coating effect on complex ice surfaces, enhances the developer's application performance on complex ice-shaped surfaces, and makes the developed layer more uniform and complete.

[0020] In some embodiments, the wetting and leveling agent is a polyether-modified siloxane. The polyether-modified siloxane is completely miscible with the developer system and will not damage the dispersion-modified layer. The polyether-modified siloxane possesses both hydrophilic and lipophilic segments, which can effectively reduce the surface tension of the developer, enhance the wetting ability of the developer on ice surfaces, improve the low-temperature leveling properties of the developer, and enhance the spreading and coating effect of polydimethylsiloxane-modified titanium dioxide on complex ice surfaces, resulting in a more continuous and uniform developing layer.

[0021] In some embodiments, the mass-to-volume ratio of the polydimethylsiloxane-modified titanium dioxide to the wetting and leveling agent is 3:0.1.

[0022] In some embodiments, the particle size of polydimethylsiloxane-modified titanium dioxide is 50 nm to 80 nm.

[0023] In some embodiments, the wetting and leveling agent is selected from any one of BYK-349, BYK-347, and AFCONA 3588. Of course, the wetting and leveling agent is not limited to the specific products mentioned above; any polyether-modified siloxane wetting and leveling agent that possesses excellent substrate wetting and leveling properties and good compatibility with polydimethylsiloxane-modified titanium dioxide is suitable for this application.

[0024] In some embodiments, the ethyl acetate is chromatographic grade ethyl acetate with a purity ≥99.9%.

[0025] Secondly, this application provides a method for preparing an ice-shaped developer, comprising: weighing each raw material according to the ratio, dispersing polydimethylsiloxane-modified titanium dioxide in ethyl acetate, mixing evenly, and preparing a dispersion with stable fractional state to obtain the ice-shaped developer; When the raw material contains a wetting and leveling agent, after the above dispersion is prepared, the wetting and leveling agent is added and mixed evenly to obtain the ice-shaped developer.

[0026] Thirdly, this application provides an application of an ice-shaped developer for measuring the three-dimensional structure of ice in an ice wind tunnel experiment.

[0027] Furthermore, measuring the three-dimensional structure of ice in the ice wind tunnel experiment includes the following steps: Step S10: First, pre-cool the ice-shaped developer to -10°C to -3°C, and then uniformly spray the ice-shaped developer onto the surface of the ice shape to be tested in the ice wind tunnel.

[0028] Step S20: Utilize the excellent diffuse reflection properties of the ice-shaped developer to obtain the spatial coordinate data of the ice-shaped surface using a three-dimensional scanning device.

[0029] The following is in conjunction with the appendix Figures 1 to 9 This application provides a detailed description of an ice-shaped developer, its preparation method, and its application through specific embodiments and application scenarios.

[0030] I. Raw Material Description The raw materials used in the following examples and comparative examples are as follows: Ethyl acetate: sourced from Aladdin Reagent (Shanghai) Co., Ltd., model: E116136-500ml, chromatographic grade, with a purity ≥99.9%.

[0031] Polydimethylsiloxane modified titanium dioxide: sourced from Daxinong Nanotechnology (Changzhou) Co., Ltd.; model: DXN-TJG20; appearance: white powder; modification ratio: ≥90%; morphology: rutile, rod-shaped; surface properties: oleophilic and hydrophobic; modifier: polydimethylsiloxane; particle size: 30-100nm.

[0032] Wetting and leveling agent: sourced from BYK Chemicals, Germany, model number: BYK-349.

[0033] Titanium dioxide, sourced from Beasley New Materials (Suzhou) Co., Ltd., has an average particle size of 5nm, a purity of 99.999%, and an anatase crystal form; it is hydrophilic.

[0034] II. Implementation Examples Example 1:

[0035] At room temperature, take 135g of ethyl acetate and 22.5g of polydimethylsiloxane-modified titanium dioxide. Pour ethyl acetate into a clean container, then slowly add the polydimethylsiloxane-modified titanium dioxide. Gently shake the container for 20 seconds (or stir slowly) to form a uniform and stable dispersion, which is the ice-shaped developer. Example 2:

[0036] At room temperature, take 135g of ethyl acetate, 22.5g of polydimethylsiloxane-modified titanium dioxide, and 0.75ml of BYK-349. Pour ethyl acetate into a clean container, then slowly add the polydimethylsiloxane-modified titanium dioxide. Gently shake the container for 20 seconds (or stir slowly). Finally, add BYK-349 and stir slowly with a glass rod for 30 seconds to form a uniform and stable dispersion, which is the ice-shaped developer. Example 3:

[0037] At room temperature, take 180g of ethyl acetate, 22.5g of polydimethylsiloxane-modified titanium dioxide, and 0.75ml of BYK-349. Pour ethyl acetate into a clean container, then slowly add the polydimethylsiloxane-modified titanium dioxide. Gently shake the container for 20 seconds, and finally add BYK-349 and stir slowly with a glass rod for 30 seconds to form a uniform and stable dispersion, which is the ice-shaped developer. Example 4:

[0038] At room temperature, take 225g of ethyl acetate, 22.5g of polydimethylsiloxane-modified titanium dioxide, and 0.75ml of BYK-349. Pour ethyl acetate into a clean container, then slowly add the polydimethylsiloxane-modified titanium dioxide. Gently shake the container for 20 seconds. Finally, add the BYK-349 wetting and leveling agent and stir slowly with a glass rod for 30 seconds to form a uniformly dispersed and stable dispersion, which is the ice-shaped developer. Example 5:

[0039] At room temperature, take 135g of ethyl acetate, 22.5g of polydimethylsiloxane-modified titanium dioxide, and 1.5ml of BYK-349. Pour ethyl acetate into a clean container, then slowly add the polydimethylsiloxane-modified titanium dioxide. Gently shake the container for 20 seconds, and finally add BYK-349 and stir slowly with a glass rod for 30 seconds to form a uniform and stable dispersion, which is the ice-shaped developer.

[0040] III. Comparative Example Comparative Example 1: At room temperature, take 135g of ethyl acetate and 22.5g of titanium dioxide (Beasley New Materials (Suzhou) Co., Ltd.). Pour ethyl acetate into a clean container, then slowly add titanium dioxide and stir with a glass rod for 30 seconds to obtain a uniformly dispersed solution, which is the ice-shaped developer.

[0041] IV. Experimental Examples 1. The ice-shaped developer prepared in Example 1 and Comparative Example 1 were subjected to a comparative experiment on the dispersion state.

[0042] 1.1 Experimental Method: An ice-shaped developer was prepared according to the methods of Example 1 and Comparative Example 1, using raw materials in equal proportions. Example 1: 18g ethyl acetate, 3g polydimethylsiloxane-modified titanium dioxide; Comparative Example 1: 18g ethyl acetate, 3g titanium dioxide (Beasley New Materials (Suzhou) Co., Ltd.); After the ice-shaped developer was prepared, it was placed in the same room temperature environment. Timing was started after the ice-shaped developer was prepared, and the dispersion state of the ice-shaped developer in Example 1 and Comparative Example 1 was observed and recorded at three time points: 20s, 40s, and 5min.

[0043] 1.2 The experimental results are as follows: (1) Observation at 20s: The ice-shaped developer in Example 1 was well dispersed with no obvious precipitation, such as Figure 1 As shown in (a). In contrast, the ice-shaped developer in Comparative Example 1 exhibited severe stratification and a large amount of titanium dioxide particles precipitated, as shown in [example 1]. Figure 1 As shown in (b); (2) Observation at 40s: The ice-shaped developer in Example 1, being a supersaturated dispersion system and subjected to gravity, showed a small amount of loose precipitation, but the overall dispersion of the dispersion was good, with no obvious stratification. Figure 2 As shown in (a), the titanium dioxide particles in the ice-shaped developer in Comparative Example 1 were almost completely precipitated, as... Figure 2 As shown in (b); (3) Observation at 5 min: The state of the ice-shaped developer dispersion in Example 1 and Comparative Example 1 was basically the same as that observed at 40 s, with no obvious changes, as shown below. Figure 3 (a) Figure 3 As shown in (b).

[0044] 1.3 The experimental conclusions are as follows: (1) The ice-shaped developer component in Comparative Example 1 showed severe stratification, and the interfacial compatibility between titanium dioxide and ethyl acetate was very poor. (2) In Example 1, the ice-shaped developer showed good dispersion of polydimethylsiloxane-modified titanium dioxide in ethyl acetate within a 5-minute observation period.

[0045] 2. The ice-shaped developer prepared in Examples 1, 2, and 4 were subjected to dispersion stability tests.

[0046] 2.1 Experimental Method: Ice-shaped developer was prepared according to the methods of Examples 1, 2, and 4, using raw materials in equal proportions. Example 1: 18g ethyl acetate, 3g polydimethylsiloxane-modified titanium dioxide; Example 2: 18g ethyl acetate, 3g polydimethylsiloxane-modified titanium dioxide, 0.1ml BYK-349; Example 4: 18g ethyl acetate, 1.8g polydimethylsiloxane-modified titanium dioxide, 0.06ml BYK-349; The ice-shaped developer was prepared using a graduated cylinder. After preparation, approximately 20 ml of the ice-shaped developer prepared in Examples 1, 2, and 4 was placed in the same room temperature environment. Timing was started after the ice-shaped developer was prepared, and the dispersion state of the ice-shaped developer in Examples 1, 2, and 4 was observed and recorded at three time points: 24 hours, 48 ​​hours, and 96 hours. Furthermore, observations were made on the 7th, 10th, and 15th days for Examples 2 and 4.

[0047] 2.2 The experimental results are as follows: (1) Observation after 24 hours: In Examples 1, 2, and 4, the color of the ice-shaped developer was lighter and the precipitation increased compared to when it was first prepared, as shown in the following figures. Figure 4 (a) Figure 4 (b) Figure 4 As shown in (c); (2) Observation at 48h: In Examples 1, 2, and 4, the ice-shaped developer showed no significant change compared to 24h, and the dispersion was in good condition. Due to poor container sealing, a small amount of ethyl acetate evaporated, as shown below. Figure 5 (a) Figure 5 (b) Figure 5 As shown in (c); (3) Observation at 96h: In Examples 1, 2, and 4, the ice-shaped developer showed no significant change compared to 48h, and the dispersion was well-dispersed, with only a small amount of ethyl acetate evaporating, as shown below. Figure 6 (a) Figure 6 (b) Figure 5 As shown in (c); (4) Observations on days 7, 10, and 15: In Examples 2 and 4, the ice-shaped developer showed a slight increase in precipitation due to the continuous evaporation of ethyl acetate, but the dispersion remained stable and the color did not change significantly. After a few seconds of simple shaking, the precipitate at the bottom quickly floated to the surface, reformed into a uniform dispersion, and maintained a good dispersion state for several minutes. Observations on days 7, 10, and 15 showed that the ice-shaped developer prepared in Example 2 was as follows: Figure 7 (a) Figure 7 (b) Figure 7 As shown in (c), the ice-shaped developer prepared in Example 4 is as follows: Figure 8 (a) Figure 8 (b) Figure 8 As shown in (c).

[0048] 2.3 The experimental conclusions are as follows: (1) Adding a wetting and leveling agent to ice-shaped developer has no effect on the interfacial compatibility between polydimethylsiloxane-modified titanium dioxide and ethyl acetate. (2) The ice-shaped developer in Examples 1, 2 and 4 of this application has good dispersion stability. Solid particles exceeding the dispersion saturation of the system will settle under gravity, but will not agglomerate or clump. (3) If the ice-shaped developer in Examples 1, 2 and 4 of this application is placed in a well-sealed container, the volatilization of ethyl acetate can be avoided, thereby extending the storage time of the ice-shaped developer.

[0049] 3. Spraying experiments were conducted on the ice-shaped developer prepared in Example 1, Example 2 and Comparative Example 1.

[0050] 3.1 Experimental Methods: First, three ice flower samples were prepared using the same ice mold in a refrigerator at -20°C. The ice-shaped developer from Examples 1, 2, and 1 was pre-cooled to sub-zero temperature and then quickly sprayed onto the surface of each ice flower sample using a spray gun of the same specification. After spraying, the refrigerator door was quickly closed (keeping the temperature inside the refrigerator at -20°C). Two minutes later, the refrigerator was opened and the ice flower samples were taken out to observe and record the coating effect of the ice-shaped developer.

[0051] 3.2 Experimental Results: (1) In Comparative Example 1, after the ice-shaped developer was sprayed onto the ice flower sample, due to the poor wettability of the developer, the overall coating effect of titanium dioxide on the ice flower sample was not good. It accumulated in large quantities in the grooves, and the specular reflection phenomenon at the petals was obvious, such as Figure 9 As shown in (a); (2) In Example 1, after the ice-shaped developer was sprayed onto the ice flower sample, compared with Comparative Example 1, the polydimethylsiloxane-modified titanium dioxide showed significantly better overall spreading effect on the ice flower sample, with a significant improvement in the coverage at the petals. However, the coverage effect was poor near the edge of the petals, such as... Figure 9 As shown in (b); (3) In Example 2, after the ice-shaped developer was sprayed onto the ice flower sample, compared with Example 1, the coating degree of polydimethylsiloxane-modified titanium dioxide on the petals of the ice flower sample was significantly improved. The coating effect was good at the edges of the petals, and the overall coating thickness was more uniform. Figure 9 As shown in (c).

[0052] 3.3 The experimental conclusions are as follows: (1) Using polydimethylsiloxane to modify titanium dioxide can give ice-shaped developer a good coating effect on ice surface; (2) The wetting and leveling agent and polydimethylsiloxane modified titanium dioxide have a synergistic effect. After adding the wetting and leveling agent, the spreading uniformity and overall coating effect of the ice-shaped developer on the complex ice surface can be further improved. The two work together to improve the application performance of the developer on the complex ice-shaped surface.

[0053] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application.

Claims

1. An ice-shaped developer, characterized in that, The raw materials include polydimethylsiloxane-modified titanium dioxide and ethyl acetate; the mass ratio of polydimethylsiloxane-modified titanium dioxide to ethyl acetate is 1:6 to 1:10; the particle size of polydimethylsiloxane-modified titanium dioxide is 30 nm to 100 nm.

2. The ice-shaped developer according to claim 1, characterized in that, The mass ratio of the polydimethylsiloxane-modified titanium dioxide to ethyl acetate is 1:6 to 1:

8.

3. The ice-shaped developer according to claim 1, characterized in that, The mass ratio of the polydimethylsiloxane-modified titanium dioxide to ethyl acetate is 1:

6.

4. The ice-shaped developer according to any one of claims 1 to 3, characterized in that, The raw materials of the ice-shaped developer also include a wetting and leveling agent. The mass-to-volume ratio of the polydimethylsiloxane-modified titanium dioxide to the wetting and leveling agent is 3:0.1 to 3:0.

2. The polydimethylsiloxane-modified titanium dioxide is measured in grams, and the wetting and leveling agent is measured in milliliters.

5. The ice-shaped developer according to claim 4, characterized in that, The wetting and leveling agent is a polyether-modified siloxane; And / or, the mass-to-volume ratio of the polydimethylsiloxane-modified titanium dioxide to the wetting and leveling agent is 3:0.

1.

6. The ice-shaped developer according to claim 1, characterized in that, The particle size of polydimethylsiloxane-modified titanium dioxide is 50 nm to 80 nm.

7. The ice-shaped developer according to claim 1, characterized in that, The wetting and leveling agent is selected from any one of BYK-349, BYK-347 and AFCONA 3588.

8. The ice-shaped developer according to claim 1, characterized in that, The ethyl acetate is chromatographic grade ethyl acetate with a purity of ≥99.9%.

9. A method for preparing an ice-shaped developer according to any one of claims 1 to 8, characterized in that, Weigh each raw material according to the ratio, disperse polydimethylsiloxane-modified titanium dioxide in ethyl acetate, mix evenly to obtain a stable dispersion, which is the ice-shaped developer. When the raw material contains a wetting and leveling agent, after a stable dispersion is obtained, the wetting and leveling agent is added and mixed evenly to obtain the ice-shaped developer.

10. The application of the ice-shaped developer prepared by the method of claim 9 in the measurement of the three-dimensional structure of ice in ice wind tunnel experiments.

Images