Preparation method of hydrophobic material based on modified aramid fiber
Modified aramid fiber-based hydrophobic materials were prepared by ion bombardment treatment of aramid fibers and mixing them with fluorinated titanium dioxide nanoparticles. This solved the problem of insufficient performance of existing materials and achieved higher hydrophobicity and anti-icing capabilities, making them suitable for fields such as power communication, aerospace and public transportation.
Patent Information
- Application Number
- CN202511817587.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-04
- Publication Date
- 2026-01-16
AI Technical Summary
The performance of existing aramid fiber-based hydrophobic materials needs further improvement, especially in applications such as power communication, aerospace and public transportation, where higher hydrophobicity and anti-icing capabilities are required.
Modified aramid fiber-based hydrophobic materials were prepared by ion bombardment of aramid fibers and mixing them with fluorinated titanium dioxide nanoparticles, organic solvents and epoxy resins. The modification process was optimized to improve the material properties.
It significantly improves the hydrophobicity and anti-icing ability of the material, enhances its service life and mechanical properties, and is suitable for a variety of extreme temperature environments.
Smart Images
Figure CN121343328A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of hydrophobic materials technology, and in particular to a method for preparing hydrophobic materials based on modified aramid fibers. Background Technology
[0002] There is a strong demand for hydrophobic anti-icing materials in fields such as power communication, aerospace, and public transportation. Aramid materials have a long service life, low ice adhesion rate, excellent hydrophobic properties, and can perform both active de-icing and passive anti-icing functions, so aramid is widely used in hydrophobic anti-icing materials. Summary of the Invention
[0003] The technical problem to be solved by the present invention is to provide a method for preparing hydrophobic materials based on modified aramid fibers, which can overcome the shortcomings of the prior art and further improve the performance of hydrophobic materials based on aramid.
[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical invention.
[0005] A method for preparing a hydrophobic material based on modified aramid fiber includes the following steps: treating aramid fiber with ion bombardment to obtain modified aramid fiber; mixing the modified aramid fiber, fluorinated titanium dioxide nanoparticles, organic solvent, epoxy resin and water to obtain the hydrophobic material.
[0006] Preferably, the aramid fibers are pretreated before ion bombardment, including the following steps. The aramid fiber was immersed in a 7.5wt% to 10wt% sodium hydroxide solution and stirred at a speed of 2000 to 3000 rad / min for 15 minutes. Then the aramid fiber was filtered out, washed with deionized water and dried.
[0007] Preferably, the ion bombardment treatment includes the following steps: Aramid fibers are placed in a vacuum chamber, and the vacuum level of the chamber is ≤1×10⁻⁶. -4 Pa, operating voltage 1.5kV, working gas is argon, working pressure is 2×10 -3 Pa~3×10 -3 Pa, ion bombardment angle of 45°, ion bombardment time of 5 min.
[0008] Preferably, the preparation of fluorinated titanium dioxide nanoparticles includes the following steps: Titanium dioxide nanoparticles were placed in a sealed container filled with carbon tetrafluoride, with the pressure inside the container being 7 × 10⁻⁶. 4 Pa~8×10 4 Pa, titanium dioxide nanoparticles were irradiated with gamma rays, and the irradiation absorption was 1×10⁻⁶. 3Gy / h, irradiation time is 20-30 min.
[0009] Preferably, the organic solvent is ethanol or acetone.
[0010] Preferably, all the following quantities are parts by weight. The hydrophobic material comprises 15-20 parts of modified aramid fiber, 2-3 parts of fluorinated titanium dioxide nanoparticles, 80-90 parts of organic solvent, 30-35 parts of epoxy resin, and 100-200 parts of water.
[0011] The beneficial effects of the above-mentioned technical invention are as follows: by optimizing the modification process of aramid fibers and fillers, the present invention improves the performance of hydrophobic materials based on aramid fibers. Attached Figure Description
[0012] Figure 1 This is a flowchart of the present invention.
[0013] Figure 2 This is an electron microscope image of the modified aramid fiber in Example 1.
[0014] Figure 3 This is an electron microscope image of fluorinated titanium dioxide from Example 1. Detailed Implementation
[0015] Example 1 Aramid fibers were immersed in an 8 wt% sodium hydroxide solution and stirred at 2300 rad / min for 15 min. The aramid fibers were then filtered out, washed with deionized water, and dried. The aramid fibers were then placed in a vacuum chamber with a vacuum level ≤1×10⁻⁶. -4 Pa, operating voltage 1.5kV, working gas is argon, working pressure is 2×10 -3 Modified aramid fibers were prepared by bombarding Pa at an ion bombardment angle of 45° and a bombardment time of 5 min. (See [reference]). Figure 2 Titanium dioxide nanoparticles were placed in a sealed container filled with carbon tetrafluoride, with the pressure inside the container being 7 × 10⁻⁶. 4 Pa, titanium dioxide nanoparticles were irradiated with gamma rays, and the irradiation absorption was 1×10⁻⁶. 3 Fluorinated titanium dioxide nanoparticles were prepared by irradiation at a rate of Gy / h for 25 min. (See [link to documentation]). Figure 3 A hydrophobic material was prepared by mixing modified aramid fibers, fluorinated titanium dioxide nanoparticles, an organic solvent, an epoxy resin, and water. The hydrophobic material consisted of 16 parts modified aramid fibers, 2 parts fluorinated titanium dioxide nanoparticles, 80 parts organic solvent, 35 parts epoxy resin, and 150 parts water.
[0016] Example 2 Aramid fibers were immersed in a 9 wt% sodium hydroxide solution and stirred at 2500 rad / min for 15 min. The aramid fibers were then filtered out, washed with deionized water, and dried. The aramid fibers were then placed in a vacuum chamber with a vacuum level ≤1×10⁻⁶. -4 Pa, operating voltage 1.5kV, working gas is argon, working pressure is 2×10 -3 Modified aramid fibers were prepared by bombarding at 45° angles and for 5 minutes using the method described above. Titanium dioxide nanoparticles were placed in a sealed container filled with carbon tetrafluoride, with the pressure inside the container set at 8 × 10⁻⁶ Pa. 4 Pa, titanium dioxide nanoparticles were irradiated with gamma rays, and the irradiation absorption was 1×10⁻⁶. 3 Fluorinated titanium dioxide nanoparticles were prepared by irradiation at a rate of Gy / h for 20 min. A hydrophobic material was prepared by mixing modified aramid fibers, fluorinated titanium dioxide nanoparticles, an organic solvent, an epoxy resin, and water. The hydrophobic material consisted of 18 parts modified aramid fibers, 2 parts fluorinated titanium dioxide nanoparticles, 85 parts organic solvent, 32 parts epoxy resin, and 120 parts water.
[0017] Example 3 Aramid fibers were immersed in a 10 wt% sodium hydroxide solution and stirred at 3000 rad / min for 15 min. The aramid fibers were then filtered out, washed with deionized water, and dried. The aramid fibers were then placed in a vacuum chamber with a vacuum level ≤1×10⁻⁶. -4 Pa, operating voltage 1.5kV, working gas is argon, working pressure is 3×10 -3 Modified aramid fibers were prepared by bombarding at 45° angles and for 5 minutes using the method described above. Titanium dioxide nanoparticles were placed in a sealed container filled with carbon tetrafluoride at a pressure of 7.5 × 10⁻⁶ Pa. 4 Pa, titanium dioxide nanoparticles were irradiated with gamma rays, and the irradiation absorption was 1×10⁻⁶. 3 Fluorinated titanium dioxide nanoparticles were prepared by irradiation at a rate of Gy / h for 30 min. A hydrophobic material was prepared by mixing modified aramid fibers, fluorinated titanium dioxide nanoparticles, an organic solvent, an epoxy resin, and water. The hydrophobic material consisted of 20 parts modified aramid fibers, 2 parts fluorinated titanium dioxide nanoparticles, 90 parts organic solvent, 30 parts epoxy resin, and 200 parts water.
[0018] Comparative Example 1 Comparative Example 1 was designed based on Example 1. Without using modified aramid fibers, the aramid fibers used in Example 1 before pretreatment were mixed with fluorinated titanium dioxide nanoparticles, an organic solvent, an epoxy resin, and water to prepare a hydrophobic material. The hydrophobic material comprised 16 parts aramid fibers, 2 parts fluorinated titanium dioxide nanoparticles, 80 parts organic solvent, 35 parts epoxy resin, and 150 parts water.
[0019] Comparative Example 2 Comparative Example 2 was designed based on Example 1. Instead of using fluorinated titanium dioxide nanoparticles, a hydrophobic material was prepared by mixing unfluorinated titanium dioxide nanoparticles, modified aramid fibers, organic solvents, epoxy resins, and water. The hydrophobic material consisted of 16 parts modified aramid fibers, 2 parts titanium dioxide nanoparticles, 80 parts organic solvents, 35 parts epoxy resins, and 150 parts water.
[0020] Comparative Example 3 Comparative Example 3 was designed based on Example 1. The hydrophobic material included 10 parts of modified aramid fiber, 5 parts of fluorinated titanium dioxide nanoparticles, 80 parts of organic solvent, 35 parts of epoxy resin, and 150 parts of water.
[0021] Comparative Example 4 Comparative Example 4 was designed based on Example 1. The hydrophobic material included 16 parts of modified aramid fiber, 2 parts of fluorinated titanium dioxide nanoparticles, 80 parts of organic solvent, 50 parts of epoxy resin, and 150 parts of water.
[0022] The hydrophobic materials prepared using the above embodiments and comparative examples were subjected to performance tests, and the results are as follows.
[0023] The hydrophobic material thickness is 0.5 mm. The service life test method involves thermal cycling within a temperature range of -40℃ to 80℃. The breakdown strength test method follows GB / T 1408.1-2016. The tensile strength test method follows GB / T13022-1991. The contact angle test method follows GB / T 30693-2014.
[0024] As can be seen from the table above, the three embodiments provided by the present invention have a clear advantage in terms of balance in various performance parameters.
[0025] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.
Claims
1. A method for preparing hydrophobic materials based on modified aramid fibers, characterized in that... Includes the following steps: Aramid fibers were prepared by ion bombardment treatment; hydrophobic materials were prepared by mixing the modified aramid fibers, fluorinated titanium dioxide nanoparticles, organic solvents, epoxy resins and water.
2. The method for preparing hydrophobic materials based on modified aramid fibers according to claim 1, characterized in that: The aramid fibers are pretreated before ion bombardment. Includes the following steps, The aramid fiber was immersed in a 7.5wt% to 10wt% sodium hydroxide solution and stirred at a speed of 2000 to 3000 rad / min for 15 minutes. Then the aramid fiber was filtered out, washed with deionized water and dried.
3. The method for preparing hydrophobic materials based on modified aramid fibers according to claim 2, characterized in that: Ion bombardment treatment Includes the following steps, Aramid fibers are placed in a vacuum chamber, and the vacuum level of the chamber is ≤1×10⁻⁶. -4 Pa, operating voltage 1.5kV, working gas is argon, working pressure is 2×10 -3 Pa~3×10 -3 Pa, ion bombardment angle of 45°, ion bombardment time of 5 min.
4. The method for preparing hydrophobic materials based on modified aramid fibers according to claim 3, characterized in that: The preparation of fluorinated titanium dioxide nanoparticles includes the following steps: Titanium dioxide nanoparticles were placed in a sealed container filled with carbon tetrafluoride, with the pressure inside the container being 7 × 10⁻⁶. 4 Pa~8×10 4 Pa, titanium dioxide nanoparticles were irradiated with gamma rays, and the irradiation absorption was 1×10⁻⁶. 3 Gy / h, irradiation time is 20-30 min.
5. The method for preparing hydrophobic materials based on modified aramid fibers according to claim 4, characterized in that: The organic solvent is ethanol or acetone.
6. The method for preparing hydrophobic materials based on modified aramid fibers according to claim 5, characterized in that: All the following quantities are by weight. The hydrophobic material comprises 15-20 parts of modified aramid fiber, 2-3 parts of fluorinated titanium dioxide nanoparticles, 80-90 parts of organic solvent, 30-35 parts of epoxy resin, and 100-200 parts of water.