Rare earth temperature-regulating sun-resistant fiber with skin-core structure and preparation method thereof
By adding rare earth nanoparticles to the fiber cortex and adding phase-change microcapsules to the core layer, the problem of improving the anti-ultraviolet and insulation performance of existing sunscreen fibers is solved, and better sunscreen and insulation effects are achieved.
Patent Information
- Application Number
- CN202510706289.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-29
- Publication Date
- 2025-09-02
AI Technical Summary
Existing sunscreen fibers have difficulties in improving UV protection and insulation performance, especially in indoor air-conditioning environments, which are difficult to meet the needs of efficient sunscreen and insulation at the same time.
Rare earth temperature-regulating sunscreen fibers with a skin core structure are used to add rare earth nanoparticles to the cortex of the fiber and phase-changing microcapsules to the core layer. UV rays are blocked by the wide spectrum absorption characteristics of the rare earth nanoparticles, and the temperature is adjusted through the phase-changing microcapsules to form a stable thermal environment.
It achieves better sun protection and thermal insulation performance, especially in indoor air conditioning environments, which can effectively block ultraviolet rays and maintain a stable temperature, improving the protection effect of the fiber.
Smart Images
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Figure BDA0005425895290000052
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of artificial fibers, in particular to a rare earth temperature-regulating sun-proof fiber with a skin-core structure and a preparation method thereof. Background Art
[0002] With increasingly hot weather, sun protection has become essential for summer travel. Existing sun-protective fibers typically incorporate sunscreen additives into the fiber raw material to enhance the fiber's sun protection. For those who frequently work in and out of offices, clothing is highly effective in providing sun protection while also meeting the thermal insulation requirements of air-conditioned indoor environments. While adding rare earth elements to fibers can absorb and block some UV rays and provide some insulation, further enhancing these benefits is difficult. Summary of the Invention
[0003] In response to the above technical requirements, the present invention provides a rare earth temperature-regulating sun-proof fiber with a skin-core structure. The present invention also provides a preparation method of the rare earth temperature-regulating sun-proof fiber with a skin-core structure, the purpose of which is to improve the fiber's UV protection performance and enhance the thermal insulation performance of the fabric.
[0004] The technical solution of the present invention is as follows: a rare earth temperature regulating sunscreen fiber with a skin-core structure, comprising a core layer and a skin layer, wherein the core layer is polyacrylonitrile containing phase change microcapsules, and the skin layer is polyacrylonitrile containing rare earth nanoparticles.
[0005] Furthermore, the mass proportion of the phase change microcapsules in the polyacrylonitrile containing the phase change microcapsules is 0.01 to 0.5%, and the mass proportion of the rare earth nanoparticles in the polyacrylonitrile containing the rare earth nanoparticles is 0.01 to 1%.
[0006] Furthermore, the core layer has a diameter of 0.05 to 0.1 mm, and the outer diameter of the skin layer is 0.1 to 0.2 mm.
[0007] Furthermore, the rare earth nanoparticles are rare earth-doped mica nanoparticles.
[0008] Another technical solution of the present invention is as follows: A method for preparing a rare earth temperature-regulating sunscreen fiber with a skin-core structure, comprising the steps of:
[0009] Rare earth nanoparticles were added to a polyacrylonitrile-NN dimethylformamide solution and stirred in a water bath to obtain a cortex solution;
[0010] Phase change microcapsules were added to a polyacrylonitrile-NN dimethylformamide solution and stirred in a water bath to obtain a core layer solution;
[0011] The rare earth temperature regulating sun-protection fiber with a skin-core structure was produced by wet spinning using a coaxial spinning nozzle.
[0012] Furthermore, the rare earth nanoparticles are added to the skin layer solution at a mass ratio of 0.01 to 1% of the rare earth nanoparticles in the polyacrylonitrile containing the rare earth nanoparticles, and the phase change microcapsules are added to the core layer solution at a mass ratio of 0.01 to 0.5% of the phase change microcapsules in the polyacrylonitrile containing the phase change microcapsules.
[0013] Furthermore, the concentration of the polyacrylonitrile in N / N dimethylformamide solution is 8% to 13% by weight when preparing the skin layer solution, and the concentration of the polyacrylonitrile in N / N dimethylformamide solution is 10% to 15% by weight when preparing the core layer solution. Different concentrations affect the fiber-forming properties of the synthetic solution; too high or too low a concentration will not easily form fibers.
[0014] Furthermore, the rare earth nanoparticles are rare earth-doped mica nanoparticles.
[0015] Furthermore, the coagulation bath solution during the wet spinning is deionized water.
[0016] Furthermore, the winding speed during the wet spinning is 5 to 10 r / min.
[0017] The advantages of the present invention compared with the prior art are:
[0018] The rare earth elements used in the present invention have a wide spectral absorption band and can absorb ultraviolet rays and a portion of visible light wavelengths, enabling them to effectively block ultraviolet penetration. Phase-change microcapsules can regulate temperature through solid-liquid conversion. The skin-core structure adopted by the present invention places rare earth particles in the cortex of the fiber, which can directly block ultraviolet rays from the external environment and protect the internal core layer from ultraviolet rays. Compared with random distribution throughout the fiber, concentrating rare earth particles in the cortex makes it easier for them to absorb ultraviolet rays and achieve the desired protective effect. The structure of the core layer creates a stable thermal environment inside the fiber, preventing the phase-change microcapsules from being directly exposed to the external environment, further enhancing the warmth-retaining effect. The present invention has better heat-insulating and sun-proof properties than rare earth-doped fibers with sunscreen functions. DETAILED DESCRIPTION
[0019] The present invention will be further described below with reference to the examples, but are not intended to limit the present invention.
[0020] In the following examples and comparative examples, the rare earth nanoparticles are rare earth-doped mica nanoparticles purchased from Tianjin Rare Earth Research Institute, the phase change microcapsules were purchased from Beijing Tiangang Auxiliary Agent Co., Ltd. TG-PCM, and polyacrylonitrile and NN dimethylformamide were purchased from Chuanhua Chemical.
[0021] Example 1
[0022] A method for preparing a rare earth temperature-regulating sunscreen fiber with a skin-core structure comprises the following steps:
[0023] Step 1: adding rare earth nanoparticles to a 10 wt% polyacrylonitrile in N-N-dimethylformamide solution, placing the solution in an 80° C. water bath, and stirring with a magnetic stirrer for 5 h until the polyacrylonitrile is completely dissolved, thereby obtaining a cortex solution;
[0024] Step 2: adding the phase change microcapsules to a 12 wt% polyacrylonitrile-NN dimethylformamide solution, placing the solution in a 100° C. water bath, and stirring with a magnetic stirrer for 5 h until the polyacrylonitrile is completely dissolved, thereby obtaining a core layer solution;
[0025] Step 3: Wet spinning is performed using a coaxial spinning nozzle with an outer tube aperture of 0.12 mm and an inner tube aperture of 0.08 mm. The coagulation bath solution is deionized water. The wet spinning receiving distance is 100 cm, the winding speed is 8 rpm, and the winding device is a glass cylinder with a diameter of 6 cm. A rare earth temperature-regulating sunscreen fiber with a sheath-core structure is produced, wherein the sheath layer is polyacrylonitrile containing rare earth nanoparticles, wherein the mass proportion of the rare earth nanoparticles is 0.5%, and the core layer is polyacrylonitrile containing phase change microcapsules, wherein the mass proportion of the phase change microcapsules is 0.2%.
[0026] Example 2
[0027] A method for preparing a rare earth temperature-regulating sunscreen fiber with a skin-core structure comprises the following steps:
[0028] Step 1: adding rare earth nanoparticles to a 10 wt% polyacrylonitrile in N-N-dimethylformamide solution, placing the solution in an 80° C. water bath, and stirring with a magnetic stirrer for 5 h until the polyacrylonitrile is completely dissolved, thereby obtaining a cortex solution;
[0029] Step 2: adding the phase change microcapsules to a 12 wt% polyacrylonitrile-NN dimethylformamide solution, placing the solution in a 100° C. water bath, and stirring with a magnetic stirrer for 5 h until the polyacrylonitrile is completely dissolved, thereby obtaining a core layer solution;
[0030] Step 3: Wet spinning is performed using a coaxial spinning nozzle with an outer tube aperture of 0.12 mm and an inner tube aperture of 0.08 mm. The coagulation bath solution is deionized water. The wet spinning receiving distance is 100 cm, the winding speed is 8 rpm, and the winding device is a glass cylinder with a diameter of 6 cm. A rare earth temperature-regulating sunscreen fiber with a sheath-core structure is produced, wherein the sheath layer is polyacrylonitrile containing rare earth nanoparticles, wherein the mass proportion of the rare earth nanoparticles is 0.01%, and the core layer is polyacrylonitrile containing phase change microcapsules, wherein the mass proportion of the phase change microcapsules is 0.01%.
[0031] Example 3
[0032] A method for preparing a rare earth temperature-regulating sunscreen fiber with a skin-core structure comprises the following steps:
[0033] Step 1: adding rare earth nanoparticles to a 10 wt% polyacrylonitrile in N-N-dimethylformamide solution, placing the solution in an 80° C. water bath, and stirring with a magnetic stirrer for 5 h until the polyacrylonitrile is completely dissolved, thereby obtaining a cortex solution;
[0034] Step 2: adding the phase change microcapsules to a 12 wt% polyacrylonitrile-NN dimethylformamide solution, placing the solution in a 100° C. water bath, and stirring with a magnetic stirrer for 5 h until the polyacrylonitrile is completely dissolved, thereby obtaining a core layer solution;
[0035] Step 3: Wet spinning is performed using a coaxial spinning nozzle with an outer tube aperture of 0.12 mm and an inner tube aperture of 0.08 mm. The coagulation bath solution is deionized water. The wet spinning receiving distance is 100 cm, the winding speed is 8 rpm, and the winding device is a glass cylinder with a diameter of 6 cm. A rare earth temperature-regulating sunscreen fiber with a sheath-core structure is produced, wherein the sheath layer is polyacrylonitrile containing rare earth nanoparticles, wherein the mass proportion of the rare earth nanoparticles is 1%, and the core layer is polyacrylonitrile containing phase change microcapsules, wherein the mass proportion of the phase change microcapsules is 0.5%.
[0036] Example 4
[0037] A method for preparing a rare earth temperature-regulating sunscreen fiber with a skin-core structure comprises the following steps:
[0038] Step 1: adding rare earth nanoparticles to a 13 wt% polyacrylonitrile in N-N-dimethylformamide solution, placing the solution in a 75° C. water bath, and stirring with a magnetic stirrer for 5 h until the polyacrylonitrile is completely dissolved, thereby obtaining a cortex solution;
[0039] Step 2: adding the phase change microcapsules to a 15 wt% polyacrylonitrile-NN dimethylformamide solution, placing the solution in a 105° C. water bath, and stirring with a magnetic stirrer for 5 h until the polyacrylonitrile is completely dissolved, thereby obtaining a core layer solution;
[0040] Step 3: Wet spinning is performed using a coaxial spinning nozzle with an outer tube aperture of 0.1 mm and an inner tube aperture of 0.05 mm. The coagulation bath solution is deionized water. The wet spinning receiving distance is 100 cm, the winding speed is 5 rpm, and the winding device is a glass cylinder with a diameter of 6 cm. A rare earth temperature-regulating sunscreen fiber with a sheath-core structure is produced, wherein the sheath layer is polyacrylonitrile containing rare earth nanoparticles, wherein the mass proportion of the rare earth nanoparticles is 0.05%, and the core layer is polyacrylonitrile containing phase change microcapsules, wherein the mass proportion of the phase change microcapsules is 0.2%.
[0041] Example 5
[0042] A method for preparing a rare earth temperature-regulating sunscreen fiber with a skin-core structure comprises the following steps:
[0043] Step 1: adding rare earth nanoparticles to an 8 wt % polyacrylonitrile-NN dimethylformamide solution, placing the solution in an 85° C. water bath, and stirring with a magnetic stirrer for 5 h until the polyacrylonitrile is completely dissolved, thereby obtaining a cortex solution;
[0044] Step 2: adding the phase change microcapsules to a 10 wt% polyacrylonitrile-NN dimethylformamide solution, placing the solution in a 110° C. water bath, and stirring with a magnetic stirrer for 5 h until the polyacrylonitrile is completely dissolved, thereby obtaining a core layer solution;
[0045] Step 3: Wet spinning is performed using a coaxial spinning nozzle with an outer tube aperture of 0.2 mm and an inner tube aperture of 0.1 mm. The coagulation bath solution is deionized water. The wet spinning receiving distance is 100 cm, the winding speed is 10 r / min, and the winding device is a glass cylinder with a diameter of 6 cm. A rare earth temperature-regulating sunscreen fiber with a sheath-core structure is produced, wherein the sheath layer is polyacrylonitrile containing rare earth nanoparticles, wherein the mass proportion of the rare earth nanoparticles is 0.2%, and the core layer is polyacrylonitrile containing phase change microcapsules, wherein the mass proportion of the phase change microcapsules is 0.4%.
[0046] Comparative Example 1
[0047] Ordinary PAN fiber, fiber diameter 0.12mm
[0048] Comparative Example 2
[0049] The preparation method for rare earth-doped fibers includes the following steps: adding rare earth nanoparticles to an 8wt% polyacrylonitrile solution in N-N-dimethylformamide, placing the solution in an 85°C water bath and stirring with a magnetic stirrer for 5 hours until the polyacrylonitrile is completely dissolved to obtain a spinning solution; and wet-spinning the spinning solution using deionized water as the coagulation bath. The wet spinning process has a receiving distance of 100 cm and a winding speed of 8 rpm using a 6cm diameter glass cylinder. The rare earth-doped fiber has a diameter of 0.12 mm, and the weight proportion of the rare earth nanoparticles is 1%.
[0050] Comparative Example 3
[0051] The preparation method for rare earth and phase-change microcapsule-doped fibers includes the following steps: adding rare earth nanoparticles and phase-change microcapsules to a 10 wt% polyacrylonitrile in N-N-dimethylformamide solution; placing the solution in an 85°C water bath and stirring with a magnetic stirrer for 5 hours until the polyacrylonitrile is completely dissolved to obtain a spinning solution; and wet-spinning the spinning solution using deionized water as the coagulation bath. The wet spinning process has a receiving distance of 100 cm and a winding speed of 8 rpm using a 6 cm diameter glass cylinder. The rare earth and phase-change microcapsule-doped fibers have a diameter of 0.12 mm, with the weight proportion of the rare earth nanoparticles being 2% and the weight proportion of the phase-change microcapsules being 0.1%.
[0052] The sun protection performance of each embodiment and comparative example was tested according to the national standard GB / T 38208-2019 "Outdoor sun protection skin clothing". The results are as follows
[0053]
[0054] The fibers of each embodiment and comparative example were made into fabrics, and the outdoor temperature was simulated at 40°C in summer. The front side of the fabrics was continuously illuminated and the temperature was measured on the back side of the fabrics. The results are shown in the following table:
[0055]
[0056] From the above results, it can be seen that the rare earth temperature-regulating sunscreen fiber with a skin-core structure of the present invention has better temperature-regulating performance while providing sun protection, and both the sun protection and temperature-regulating performance are superior to those of fibers without a skin-core structure.
Claims
1. A rare earth temperature regulating sunscreen fiber with a skin-core structure, characterized in that: The invention comprises a core layer and a skin layer, wherein the core layer is polyacrylonitrile containing phase-change microcapsules, and the skin layer is polyacrylonitrile containing rare earth nanoparticles.
2. The rare earth temperature regulating sunscreen fiber with a skin-core structure according to claim 1, characterized in that: The mass proportion of the phase-change microcapsules in the polyacrylonitrile containing the phase-change microcapsules is 0.01-0.5%, and the mass proportion of the rare earth nanoparticles in the polyacrylonitrile containing the rare earth nanoparticles is 0.01-1%.
3. The rare earth temperature regulating sunscreen fiber with a skin-core structure according to claim 1, characterized in that: The core layer has a diameter of 0.05 to 0.1 mm, and the skin layer has an outer diameter of 0.1 to 0.2 mm.
4. The rare earth temperature regulating sunscreen fiber with a skin-core structure according to claim 1, characterized in that: The rare earth nanoparticles are rare earth-doped mica nanoparticles.
5. A method for preparing the rare earth temperature regulating sunscreen fiber with a skin-core structure as claimed in claim 1 or 3, characterized in that: Including steps: Rare earth nanoparticles were added to a polyacrylonitrile-NN dimethylformamide solution and stirred in a water bath to obtain a cortex solution; Phase change microcapsules were added to a polyacrylonitrile-NN dimethylformamide solution and stirred in a water bath to obtain a core layer solution; The rare earth temperature regulating sun-protection fiber with a skin-core structure was produced by wet spinning using a coaxial spinning nozzle.
6. The method for preparing the rare earth temperature regulating sunscreen fiber with a skin-core structure according to claim 5, characterized in that: The rare earth nanoparticles are added to the skin layer solution at a mass ratio of 0.01 to 1% in the polyacrylonitrile containing the rare earth nanoparticles, and the phase change microcapsules are added to the core layer solution at a mass ratio of 0.01 to 0.5% in the polyacrylonitrile containing the phase change microcapsules.
7. The method for preparing the rare earth temperature regulating sunscreen fiber with a skin-core structure according to claim 5, characterized in that: When preparing the skin layer solution, the concentration of the polyacrylonitrile-NN dimethylformamide solution is 8% to 13% wt. When preparing the core layer solution, the concentration of the polyacrylonitrile-NN dimethylformamide solution is 10% to 15% wt.
8. The method for preparing the rare earth temperature regulating sunscreen fiber with a skin-core structure according to claim 5, characterized in that: The rare earth nanoparticles are rare earth-doped mica nanoparticles.
9. The method for preparing the rare earth temperature regulating sunscreen fiber with a skin-core structure according to claim 5, characterized in that: The coagulation bath solution during the wet spinning process is deionized water.
10. The method for preparing the rare earth temperature regulating sunscreen fiber with a skin-core structure according to claim 5, characterized in that: The winding speed during the wet spinning is 5 to 10 r / min.