Polyester fiber with phase change temperature regulation function and preparation method thereof

Abstract

The invention relates to a polyester fiber with a phase change temperature regulation function and a preparation method thereof, and belongs to the technical field of textile materials. The polyester fiber with the phase change temperature regulation function comprises a skin layer unit and a core layer unit, the skin layer unit adopts a polyester fiber base material, the core layer unit adopts lauric acid, a cavity is formed in the polyester fiber base material, and the lauric acid is packaged in the cavity of the polyester fiber base material. The polyester fiber with the phase change temperature adjusting function can be prepared, the preparation method is simple, and the polyester fiber can be well applied to textiles such as outdoor work clothes, sportswear and home textile bedding.

Description

Technical Field

[0001] The present invention belongs to the technical field of textile materials, and specifically relates to a polyester fiber with phase change temperature regulating function and a preparation method thereof. Background Art

[0002] With the continuous consumption of fossil fuel resources, the emission of large amounts of carbon dioxide and industrial waste has posed a huge threat to the environment. It is necessary to develop new technologies and materials for the effective conversion and management of energy. PCM (Phase Change Material, referred to as PCM, phase change material) as a renewable clean energy material has attracted widespread attention due to its high energy storage density, isothermal behavior and energy recyclability. Combine phase change materials with textiles. When the external temperature changes, the phase change material undergoes a physical state change, which can absorb or release heat, adjust the thermal comfort of the human microenvironment, reduce the use of external ambient temperature regulating appliances such as air conditioners and heaters, and achieve the purpose of energy conservation and emission reduction. At present, the preparation methods of phase change yarn mainly include spinning method and fiber hollow filling method. The spinning method has problems in spinning difficulty, energy consumption, solvent pollution, thermal cycle stability, etc. The fiber hollow filling method is also lacking in fiber selection, yarn preparation, and phase change material sealing.

[0003] The patent with application number CN202311267840.X discloses a method for preparing phase change fiber by coaxial wet spinning and phase change fiber. At room temperature, sodium alginate is added to the phase change material emulsion and fully dissolved to obtain a core material solution; a metal salt coagulant and a polymer are added to an organic solvent and fully dissolved to obtain a shell material solution; the core material solution and the shell material solution are respectively input into the inner layer and outer layer of the coaxial needle, squeezed into a water coagulation bath through the needle, and the obtained fiber is soaked in water, then taken out, and then soaked in ethanol or warm water, and dried. Although phase change fibers with good phase change effects can be obtained, this method is not only complicated in process and difficult in spinning, but also the large amount of solvents in the preparation process are prone to environmental pollution.

[0004] The patent application number CN202410732779.X discloses a self-adhesive phase-change microcapsule temperature-regulating fiber and a preparation method thereof, wherein the preparation method is as follows: using polydopamine as the shell material and phase-change material as the core material to prepare phase-change microcapsules, adding a fiber substrate during the formation of the phase-change microcapsules, and making the phase-change microcapsules adhere to the fiber substrate through a one-pot method to obtain the self-adhesive phase-change microcapsule temperature-regulating fiber. This method is simple to operate and is conducive to efficient and continuous production, but the produced fiber has a low thermal melting enthalpy and poor temperature regulation ability. Summary of the invention

[0005] The present invention proposes a polyester fiber with phase change temperature regulation function and a preparation method thereof, aiming to partially or completely solve the technical problems of the prior art such as the complex preparation process of phase change fiber, low fiber strength, and difficulty in yarn formation. The prepared polyester fiber with phase change temperature regulation function has a stable phase change temperature regulation ability, and the strength of the polyester fiber itself is basically not damaged, meeting the production requirements of subsequent spinning. The technical solution of the present invention is as follows:

[0006] In a first aspect, a polyester fiber with phase change temperature regulating function comprises: a skin unit and a core unit; the skin unit adopts a polyester fiber substrate, the core unit adopts lauric acid, a cavity is formed inside the polyester fiber substrate, and lauric acid is encapsulated in the cavity of the polyester fiber substrate.

[0007] Optionally, the surface of the polyester fiber substrate is smooth, the phase transition temperature of lauric acid is about 40° C., and the thermal melting enthalpy is 180 J / g.

[0008] In a second aspect, a method for preparing a polyester fiber with a phase change temperature regulating function, comprising the following steps:

[0009] Step S100: adding lauric acid to a dry polyester fiber substrate having a cavity formed therein, and heating the lauric acid until the lauric acid melts;

[0010] Step S200: encapsulating lauric acid into the cavity of the polyester fiber substrate by using a vacuum impregnation method to obtain polyester lauric acid mixed phase change fiber;

[0011] Step S300: using anhydrous ethanol as a solvent to soak, stir, and wash the obtained polyester lauric acid mixed phase change fiber, and wash away the lauric acid remaining on the surface of the polyester lauric acid mixed phase change fiber;

[0012] Step S400: After washing away the lauric acid remaining on the surface of the polyester lauric acid mixed phase change fiber, drying is carried out overnight to obtain the polyester fiber with phase change temperature regulating function.

[0013] Optionally, step S100 includes:

[0014] Step S101: weigh 1g of hollow polyester fiber with a fiber fineness of 2.5D, a length of 38mm, and a hollowness of 30%, and dry it in an oven at 40°C for 30min to complete the drying of the fiber substrate;

[0015] Step S102: weighing 20 g of lauric acid, with a mass ratio of 1:20, and adding it into the inner cavity of the dry polyester fiber substrate to complete the addition of lauric acid;

[0016] Step S103: placing the mixture on a constant temperature heating table and heating it at 80° C. until the lauric acid is completely melted.

[0017] Optionally, step S200 includes:

[0018] Step S201: preheat the vacuum drying oven to 70° C., place the heated and melted mixture in the vacuum drying oven, and immerse for 24 hours;

[0019] Step S202: close the vent valve, open the vacuum valve, evacuate the vacuum drying oven to -0.1Mpa, close the vacuum valve, and maintain for 15 minutes; open the vent valve, and then open the vacuum valve to allow air to enter the vacuum drying oven until the oven door can be opened;

[0020] Step S203: Repeat step S202 multiple times to allow lauric acid to fully enter the cavity of the polyester fiber substrate to obtain polyester lauric acid mixed phase change fiber.

[0021] Optionally, step S300 includes:

[0022] Step S301: using anhydrous ethanol as a solvent, adding the polyester lauric acid mixed phase change fiber into the anhydrous ethanol, and the anhydrous ethanol covers the polyester lauric acid mixed phase change fiber;

[0023] Step S302: Stir the polyester lauric acid mixed phase change fiber on a magnetic stirrer for 1 hour, then take it out, and then rinse the lauric acid remaining on the surface of the polyester lauric acid mixed phase change fiber with ethanol.

[0024] Optionally, step S400 includes: placing the washed polyester lauric acid mixed phase change fiber in an oven and drying it at 40° C. overnight.

[0025] Optionally, in step S101, the surface of the polyester fiber substrate is smooth; in step S100, the phase transition temperature of lauric acid is about 40°C, and the thermal melting enthalpy is 180 J / g.

[0026] The beneficial effects achieved by the present invention are as follows:

[0027] (1) In the present application, the polyester fiber with phase change temperature regulation function can effectively maintain the temperature of the microenvironment on the human body surface stable. When the ambient temperature changes, the lauric acid as a phase change functional material will undergo a solid-liquid transition, and this transition is accompanied by the absorption or release of heat. When the temperature rises, the phase change material absorbs heat to prevent the human body from feeling overheated; when the temperature drops, it releases heat to prevent the human body from catching cold, creating a comfortable and stable body temperature for the human body;

[0028] (2) In the present invention, lauric acid is restricted and retained in the cavity of the polyester fiber due to the capillary suction effect of the cavity inside the polyester fiber substrate. Even if the lauric acid is in liquid state, it will not leak, thereby ensuring the stability of the fiber during long-term use and multiple temperature changes, so that it has excellent thermal cycle stability and can be cycled for multiple times for temperature regulation, greatly extending the service life of the polyester fiber and stably exerting the temperature regulation function for a long time;

[0029] (3) In the present application, polyester fiber has been widely used as a substrate in the fields of clothing, home textiles, etc. The polyester fiber substrate has a large output, is easy to obtain, and has high safety. Lauric acid has excellent temperature regulation performance and is also a relatively safe phase change material, which is safe and non-toxic. The combination of the two forms a polyester fiber with phase change temperature regulation function, which not only realizes efficient temperature regulation function, but also fully guarantees the safety of the use process, so that consumers can use it with confidence. Whether it is daily wear or home use, it can bring a comfortable and safe experience, and can be well applied to textiles such as outdoor work clothes, sportswear, home textile bedding, etc.

[0030] (4) In the present application, in the preparation method of polyester fiber with phase change temperature regulating function, when combining the polyester fiber substrate with lauric acid, the vacuum impregnation method is extremely simple to operate, very easy to master and implement, and can efficiently combine the two together, with high encapsulation efficiency. Lauric acid can also be encapsulated in a relatively large amount and stably into the cavity of the polyester fiber substrate, thereby ensuring the temperature regulating performance of the fiber; the preparation method causes almost no damage to the strength of the polyester fiber substrate, and the original strength of the polyester fiber is completely retained, so that in the subsequent weaving process, the fiber can withstand various mechanical stresses and will not be weakened in the process of combining with lauric acid and breakage. The original spinnability of the polyester fiber is well retained, and it is also ensured that a series of subsequent processes such as spinning and weaving of the polyester fiber with phase change temperature regulating function can be smoothly carried out, realizing the feasibility of the preparation method in the actual production process, providing a powerful technical reference for the large-scale industrial production of polyester fibers and fabrics with phase change temperature regulating function, and enhancing the potential economic value and market prospects of the future application of polyester fibers and fabrics with phase change temperature regulating function. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0032] Figure 1 This is a schematic structural diagram of a polyester fiber with phase change temperature regulation function applied for by the present invention.

[0033] Figure 2 This is a schematic flow chart of a method for preparing polyester fiber with phase change temperature regulation function applied for by the present invention.

[0034] Figure 3 Schematic diagram of the comparison between the polyester fiber with phase change temperature regulation function and the hollow polyester fiber prepared in the present invention Figure 1 .

[0035] Figure 4 Schematic diagram of the comparison between the polyester fiber with phase change temperature regulation function and the hollow polyester fiber prepared in the present invention Figure 2 .

[0036] The accompanying drawings are used to provide further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. DETAILED DESCRIPTION

[0037] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments; based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0038] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention. "Including" can at least be understood as the meaning of only including. In order to make the purpose, technical solutions and advantages of the present invention clearer, the implementation methods of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0039] In a first aspect, a polyester fiber with phase change temperature regulating function includes: a skin unit 100 and a core unit 200; the skin unit 100 uses a polyester fiber substrate, the core unit 200 uses lauric acid, a cavity is formed inside the polyester fiber substrate, and lauric acid is encapsulated in the cavity of the polyester fiber substrate.

[0040] In the present application, firstly, the polyester fiber with phase change temperature regulation function can effectively maintain the temperature stability of the microenvironment on the surface of the human body. When the ambient temperature changes, the lauric acid therein as a phase change functional material will undergo a solid-liquid transformation, and this transformation is accompanied by the absorption or release of heat. When the temperature rises, the phase change material absorbs heat to prevent the human body from feeling overheated; when the temperature drops, it releases heat to prevent the human body from catching cold, creating a comfortable and stable body temperature for the human body; in addition, benefiting from the capillary suction effect of the cavity inside the polyester fiber substrate, lauric acid is constrained and retained in the cavity of the polyester fiber, and even if the lauric acid is in liquid state, it will not leak, ensuring the stability of the fiber during long-term use and multiple temperature changes, so that it has excellent thermal cycle stability, can continuously perform temperature regulation for multiple times, greatly extending the service life of the polyester fiber, and stably exerting the temperature regulation function for a long time; In addition, polyester fiber has been widely used as a base material in the fields of clothing, home textiles, etc. Polyester fiber base material has large output, is easy to obtain, and has high safety. Lauric acid has excellent temperature regulation performance and is also a relatively safe phase change material, which is safe and non-toxic. The combination of the two has a high encapsulation efficiency. The formed polyester fiber with phase change temperature regulation function not only realizes efficient temperature regulation function, but also fully guarantees the safety of the use process, allowing consumers to use it with confidence. Whether it is daily wear or home use, it can bring a comfortable and safe experience, and can be well applied to outdoor work clothes, sportswear, home textile bedding and other textiles.

[0041] Optionally, the surface of the polyester fiber substrate is smooth, the phase transition temperature of lauric acid is about 40° C., and the thermal melting enthalpy is 180 J / g.

[0042] In the present application, first of all, lauric acid is insoluble in water and has excellent washing stability. After multiple washings, it can still maintain its original functions and characteristics, greatly extending the service life of the product; lauric acid is non-toxic in contact with the human body and is extremely safe, so it can be safely used in products such as clothing and home textiles that are in close contact with the human body; about 40°C can at least be understood as: 40°C ± 5°C, lauric acid can undergo phase change behavior at about 40°C, and its phase change temperature of about 40°C matches the normal body temperature of the human body at 36°C-37°C. When the ambient temperature fluctuates in the direction of high temperature and approaches or exceeds the normal body temperature range of the human body, lauric acid can accurately and keenly sense temperature changes. When the temperature rises to nearly 40°C, lauric acid begins to change from solid to liquid, absorbing a large amount of heat in the process. This endothermic effect can effectively suppress the excessive rise in temperature around the human body, thereby creating a cool and comfortable microenvironment for the human body and avoiding the discomfort caused by high temperature. On the contrary, when the ambient temperature drops slightly, the liquid lauric acid will solidify again, releasing heat to keep the temperature around the human body at a suitable level. Moreover, the hot melting enthalpy of 180 J / g provides sufficient heat absorption and release capacity for lauric acid in the phase change process. Whether it is heat absorption in a high temperature environment or heat release in a low temperature environment, it can efficiently and stably perform phase change temperature regulation, greatly enhancing the temperature regulation function and bringing a more comfortable experience to users. In addition, the smooth surface of the polyester fiber substrate, during the weaving process of polyester fiber with phase change temperature regulation function, the smooth surface greatly reduces the friction between the fibers, the weaving process is smooth and efficient, and the production efficiency and product quality are improved. The polyester fiber substrate has a certain strength and can maintain good integrity. It is not easy to break and damage, which ensures the continuity of production and the qualified rate of the fabric. At the same time, the smooth surface of the polyester fiber substrate brings excellent touch to the fabric. The user will not feel rough, but experience a delicate, smooth and comfortable touch, which greatly improves the user experience of the fabric with phase change temperature regulation function.

[0043] In a second aspect, a method for preparing polyester fiber with phase change temperature regulating function comprises the following steps:

[0044] Step S100: adding lauric acid to a dry polyester fiber substrate having a cavity formed therein, and heating the lauric acid until the lauric acid melts;

[0045] Specifically, step S100 includes:

[0046] Step S101: weigh 1g of hollow polyester fiber with a fiber fineness of 2.5D, a length of 38mm, and a hollowness of 30%, and dry it in an oven at 40°C for 30min to complete the drying of the fiber substrate;

[0047] Step S102: weighing 20 g of lauric acid, with a mass ratio of 1:20, and adding it into the inner cavity of the dry polyester fiber substrate to complete the addition of lauric acid;

[0048] Step S103: placing the mixture on a constant temperature heating table and heating it at 80° C. until the lauric acid is completely melted.

[0049] In the present application, drying the fiber substrate in step S101 can remove moisture and provide good conditions for subsequent operations. At the same time, clear fiber parameters (fineness, length, hollowness) are conducive to ensuring the consistency of product performance. Appropriate drying temperature and duration can effectively dehumidify without damaging the fiber; the mass ratio of 1:20 in step S102 is objectively considered, which can ensure that lauric acid is sufficiently filled without excessively affecting other fiber properties, and the operation of adding lauric acid to the internal cavity of the fiber substrate is simple and direct; heating at 80°C in step S103 until the lauric acid is completely melted, this temperature ensures that the lauric acid melts quickly and is within the tolerance range of the polyester fiber substrate, which is conducive to the subsequent full fusion of the two to play a temperature regulating function. The mixture can be understood as including the fiber substrate and lauric acid.

[0050] Step S200: encapsulating lauric acid into the cavity of the polyester fiber substrate by using a vacuum impregnation method to obtain polyester lauric acid mixed phase change fiber.

[0051] Specifically, step S200 includes:

[0052] Step S201: preheat the vacuum drying oven to 70° C., place the heated and melted mixture in the vacuum drying oven, and immerse for 24 hours;

[0053] Step S202: close the vent valve, open the vacuum valve, evacuate the vacuum drying oven to -0.1Mpa, close the vacuum valve, and maintain for 15 minutes; open the vent valve, and then open the vacuum valve to allow air to enter the vacuum drying oven until the oven door can be opened;

[0054] Step S203: Repeat step S202 multiple times to allow lauric acid to fully enter the cavity of the polyester fiber substrate to obtain polyester lauric acid mixed phase change fiber.

[0055] In the present application, the 70°C preheating vacuum drying oven in step S201 creates a suitable temperature environment for impregnation, which is beneficial for lauric acid to better contact with the polyester fiber substrate in a melted state. The 24-hour impregnation time can ensure that lauric acid is fully impregnated into the fiber, making full use of time to improve the impregnation effect; in steps S202 and S203, vacuuming to -0.1Mpa and maintaining it for a period of time can effectively remove air and avoid air interference with the impregnation process. Repeating this step multiple times can allow lauric acid to enter the cavity of the polyester fiber substrate more deeply and fully under pressure changes, thereby improving the uniformity and integrity of the mixing, thereby obtaining high-quality polyester lauric acid mixed phase change fiber and fully ensuring its temperature regulation performance.

[0056] Step S300: using anhydrous ethanol as a solvent to soak, stir, and wash the obtained polyester lauric acid mixed phase change fiber, and wash away the lauric acid remaining on the surface of the polyester lauric acid mixed phase change fiber;

[0057] Specifically, step S300 includes:

[0058] Step S301: using anhydrous ethanol as a solvent, adding the polyester lauric acid mixed phase change fiber into the anhydrous ethanol, and the anhydrous ethanol covers the polyester lauric acid mixed phase change fiber;

[0059] Step S302: stirring the polyester lauric acid mixed phase change fiber on a magnetic stirrer for 1 hour, then taking it out, and then washing the lauric acid remaining on the surface of the polyester lauric acid mixed phase change fiber with ethanol;

[0060] In the present application, anhydrous ethanol is used as a solvent in step S301, which can effectively dissolve and remove the lauric acid remaining on the surface of the polyester lauric acid mixed phase change fiber. Anhydrous ethanol has good solubility and has a good cleaning effect on organic matter such as lauric acid. It is ensured that the anhydrous ethanol does not cover the polyester lauric acid mixed phase change fiber, so that all parts of the fiber surface can be fully contacted with the solvent, ensuring the comprehensiveness of the cleaning; in step S302, a magnetic stirrer is used to stir for 1 hour, so that the fiber and the solvent are fully mixed, so that the residual lauric acid is easier to separate from the fiber surface, and finally rinsing with ethanol further ensures the cleanliness of the fiber surface, improves the smoothness of the polyester lauric acid mixed phase change fiber, and ensures the same spinnability as the original polyester fiber substrate.

[0061] Step S400: After washing away the lauric acid remaining on the surface of the polyester lauric acid mixed phase change fiber, drying is carried out overnight to obtain the polyester fiber with phase change temperature regulating function.

[0062] Specifically, step S400 includes: placing the washed polyester lauric acid mixed phase change fiber in an oven and drying it at 40° C. overnight.

[0063] In the present application, drying overnight can ensure that the polyester lauric acid mixed phase change fiber is fully dried, and can effectively remove the residual anhydrous ethanol solvent in the fiber, preventing the residual solvent from affecting the subsequent use of the fiber, such as the adverse effects that may be caused during the spinning, weaving and other processing processes, thereby ensuring the quality of the prepared polyester fiber with phase change temperature regulation function.

[0064] In step S101, the surface of the polyester fiber substrate is smooth.

[0065] In the present application, the polyester fiber substrate has a smooth surface. During the weaving process of the polyester fiber with phase change temperature regulation function into fabric, the smooth surface greatly reduces the friction between the fibers, and the weaving process is smooth and efficient, which improves the production efficiency and product quality. The polyester fiber substrate has a certain strength and can maintain good integrity. It is not easy to break or damage, which ensures the continuity of production and the qualified rate of the fabric. At the same time, the smooth surface of the polyester fiber substrate brings excellent touch to the fabric. The user will not feel rough, but experience a delicate, smooth and comfortable touch, which greatly improves the user experience of the fabric with phase change temperature regulation function.

[0066] In step S100, the phase transition temperature of lauric acid is about 40°C, and the thermal melting enthalpy is 180 J / g.

[0067] In the present invention application, lauric acid is insoluble in water and has excellent washing stability. After multiple washings, it can still maintain its original functions and characteristics, greatly extending the service life of the product; lauric acid is non-toxic in contact with the human body and is extremely safe, so it can be safely used in products that are in close contact with the human body, such as clothing and home textiles; its phase change temperature of about 40°C matches the normal human body temperature of 36°C-37°C. When the ambient temperature fluctuates in the direction of high temperature and approaches or exceeds the normal human body temperature range, lauric acid can accurately and keenly sense temperature changes. When the temperature rises to nearly 40°C, lauric acid begins to change from solid to liquid, absorbing a large amount of heat in the process. This endothermic effect can effectively inhibit the excessive rise in temperature around the human body, thereby creating a cool and comfortable microenvironment for the human body and avoiding the discomfort caused by high temperature. On the contrary, when the ambient temperature drops slightly, the liquid lauric acid will solidify again, releasing heat to keep the temperature around the human body at a suitable level. Moreover, the thermal melting enthalpy of 180 J / g provides lauric acid with sufficient heat absorption and release capacity during the phase change process. Whether it is absorbing heat in a high-temperature environment or releasing heat in a low-temperature environment, it can efficiently and stably perform phase change temperature regulation, greatly enhancing the temperature regulation function.

[0068] like Figure 3 (a) and Figure 3 As shown in (b), the prepared polyester fiber with phase change temperature regulation function ( Figure 3(a)) in the original internal cavity of the polyester fiber ( Figure 3 (b)) There is an obvious core layer at the cavity position; Figure 3 (c) and Figure 3 As shown in (d), the prepared polyester fiber with phase change temperature regulation function ( Figure 3 (c)) and the polyester fiber with an original internal cavity ( Figure 3 (d)) The surface smoothness is uniform and there is no residual phase change material. Figure 4 As shown, the prepared polyester fiber with phase change temperature regulation function (the solid line in the figure represents the polyester fiber with phase change temperature regulation function) has obvious endothermic peak and exothermic peak compared with the polyester fiber originally with an internal cavity (the dotted line in the figure represents the polyester fiber originally with a internal cavity). The peak temperature of the endothermic peak is 42.3°C, and the enthalpy value is 24.05J / g; the peak temperature of the exothermic peak is 40.2°C, and the enthalpy value is 24.16J / g, which has a temperature regulation function.

[0069] Therefore, in the present application, in the preparation method of polyester fiber with phase change temperature regulating function, when the polyester fiber substrate is combined with lauric acid, the vacuum impregnation method is extremely simple to operate, very easy to master and implement, and can efficiently combine and encapsulate the two together. Lauric acid can also be encapsulated in a relatively large amount and stably into the cavity of the polyester fiber substrate, thereby ensuring the temperature regulating performance of the fiber; the preparation method causes almost no damage to the strength of the polyester fiber substrate, and the original strength of the polyester fiber is completely retained, so that in the subsequent weaving process, the fiber can withstand various mechanical stresses and will not be weakened in the process of combining with lauric acid and breakage. The original spinnability of the polyester fiber is well retained, and it is also ensured that a series of subsequent processes such as spinning and weaving of the polyester fiber with phase change temperature regulating function can be smoothly promoted, and the feasibility of the preparation method in the actual production process is fully realized, which provides a powerful technical reference for the large-scale industrial production of polyester fibers and fabrics with phase change temperature regulating function, and enhances the potential economic value and market prospects of the future application of polyester fibers and fabrics with phase change temperature regulating function.

[0070] The drawings are only one of the embodiments of the present invention, and the actual structure is not limited thereto. In short, if ordinary technicians in the field are inspired by it and design a structure and embodiment similar to the technical solution without creativity without departing from the purpose of the present invention, they should all fall within the protection scope of the present invention.

Claims

1. A polyester fiber with phase change temperature regulation function, characterized in that: include: The skin layer unit and the core layer unit; the skin layer unit adopts a polyester fiber base material, and the core layer unit adopts lauric acid. A cavity is formed inside the polyester fiber base material, and the lauric acid is encapsulated in the cavity of the polyester fiber base material.

2. The polyester fiber with phase change temperature regulating function according to claim 1, characterized in that: The surface of the polyester fiber substrate is smooth, the phase transition temperature of lauric acid is around 40°C, and the thermal melting enthalpy is 180 J / g.

3. A method for preparing a polyester fiber with a phase change temperature regulating function, comprising the following steps: Step S100: adding lauric acid to a dry polyester fiber substrate having a cavity formed therein, and heating the lauric acid until the lauric acid melts; Step S200: encapsulating lauric acid into the cavity of the polyester fiber substrate by using a vacuum impregnation method to obtain polyester lauric acid mixed phase change fiber; Step S300: using anhydrous ethanol as a solvent to soak, stir, and wash the obtained polyester lauric acid mixed phase change fiber, and wash away the lauric acid remaining on the surface of the polyester lauric acid mixed phase change fiber; Step S400: After washing away the lauric acid remaining on the surface of the polyester lauric acid mixed phase change fiber, drying is carried out overnight to obtain the polyester fiber with phase change temperature regulating function.

4. The method for preparing polyester fiber with phase change temperature regulating function according to claim 3, characterized in that: Step S100 includes: Step S101: weigh 1g of hollow polyester fiber with a fiber fineness of 2.5D, a length of 38mm, and a hollowness of 30%, and dry it in an oven at 40°C for 30min to complete the drying of the fiber substrate; Step S102: weighing 20 g of lauric acid, with a mass ratio of 1:20, and adding it into the inner cavity of the dry polyester fiber substrate to complete the addition of lauric acid; Step S103: placing the mixture on a constant temperature heating table and heating it at 80° C. until the lauric acid is completely melted.

5. The method for preparing polyester fiber with phase change temperature regulating function according to claim 4, characterized in that: Step S200 includes: Step S201: preheat the vacuum drying oven to 70° C., place the heated and melted mixture in the vacuum drying oven, and immerse for 24 hours; Step S202: close the vent valve, open the vacuum valve, evacuate the vacuum drying oven to -0.1Mpa, close the vacuum valve, and maintain for 15 minutes; open the vent valve, and then open the vacuum valve to allow air to enter the vacuum drying oven until the oven door can be opened; Step S203: Repeat step S202 multiple times to allow lauric acid to fully enter the cavity of the polyester fiber substrate to obtain polyester lauric acid mixed phase change fiber.

6. The method for preparing polyester fiber with phase change temperature regulating function according to claim 5, characterized in that: Step S300 includes: Step S301: using anhydrous ethanol as a solvent, adding the polyester lauric acid mixed phase change fiber into the anhydrous ethanol, and the anhydrous ethanol covers the polyester lauric acid mixed phase change fiber; Step S302: Stir the polyester lauric acid mixed phase change fiber on a magnetic stirrer for 1 hour, then take it out, and then rinse the lauric acid remaining on the surface of the polyester lauric acid mixed phase change fiber with ethanol.

7. The method for preparing polyester fiber with phase change temperature regulating function according to claim 6, characterized in that: Step S400 includes: placing the washed polyester lauric acid mixed phase change fiber in an oven and drying it at 40° C. overnight.

8. According to the method for preparing a polyester fiber with phase change temperature regulating function as claimed in claim 7, in step S101, the surface of the polyester fiber substrate is smooth; in step S100, the phase change temperature of lauric acid is about 40°C, and the thermal melting enthalpy is 180 J / g.

Images