Bio-based PEF fiber with cool feeling and quick-drying function as well as preparation method and application of bio-based PEF fiber

Abstract

The invention discloses a bio-based PEF fiber with a cool feeling and a quick-drying function as well as a preparation method and application thereof, and belongs to the field of textile functional materials. The bio-based PEF fiber with the cool feeling and the quick-drying function is prepared by spinning bio-based poly (ethylene 2, 5-furandicarboxylate) with an epoxy group and a sulfonic acid group; the bio-based PEF fiber has a profiled fiber cross section and / or a hollow structure. The bio-based poly (ethylene 2, 5-furandicarboxylate) with an epoxy group and a sulfonic acid group is adopted, the hydrophilicity is improved, and the PEF fiber with the special-shaped section and / or the hollow structure is constructed to achieve the cool feeling, so that the moisture absorption and quick drying effects of the fiber are improved. The heat dissipation effect of the fiber can be improved, the moisture absorption and quick-drying effect of the fiber can be improved, and therefore dual improvement of the cool feeling and the quick-drying function is achieved. When the PEF fiber with the cool feeling and the quick-drying function is prepared, the mechanical property, the biodegradability and the like can be considered.

Description

Technical Field

[0001] The present invention relates to the field of textile functional materials, and particularly to a bio-based PEF fiber with cooling and quick-drying functions, a preparation method thereof, and an application thereof. Background Art

[0002] In recent years, with the progress of the synthesis technologies of 5-hydroxymethylfurfural (HMF) and 2,5-furandicarboxylic acid (FDCA) monomers and the enhancement of people's environmental protection awareness, the research on polyethylene furanoate (PEF) has gradually become a hot topic. With the continuous improvement of environmental protection awareness, the application demands of PEF in the fields of packaging, textiles, medical treatment, etc. are increasing day by day. Compared with petroleum-based polyester PET, bio-based polyester PEF has multiple advantages: PEF has a lower melting point, which is beneficial to reducing the energy consumption in production and processing; a higher glass transition temperature, that is, a higher application temperature range; higher tensile modulus and tensile strength. In terms of environmental protection, PEF also has great advantages: compared with the production of the same equivalent of PET, the amount of non-renewable energy consumed and the amount of greenhouse gas emissions during the production process of PEF are reduced by 40% - 50% and 45% - 55% respectively. At the same time, PEF can be recycled like PET, demonstrating the advantages of environmental friendliness and sustainable development.

[0003] Currently, bio-based raw materials such as plant fibers and biomass waste are mainly used to prepare PEF by chemical synthesis or biological fermentation methods. However, the existing PEF fibers generally do not have special functions such as cooling and quick-drying, so their applications in outdoor clothing are less.

[0004] With the increasingly serious greenhouse climate problem, the summer temperature frequently breaks records. When the sun is strong in summer and people are outdoors, due to the too high environmental temperature, sweating of the body will cause discomfort. The sweat soaks through the clothing fabric or adheres to the skin surface, with poor air permeability, affecting the thermal physiological comfort of the human body. If PEF fibers combined with the characteristics of cooling and quick-drying are produced, they have broad application potential in the fields of sportswear, outdoor equipment, etc. These high-performance fibers can not only meet the needs of consumers for comfort, but also conform to the development trend of green environmental protection. Summary of the Invention

[0005] In view of this, the present invention provides a bio-based PEF fiber with cooling and quick-drying functions, a preparation method thereof, and an application thereof. The bio-based PEF fiber provided by the present invention has the functions of cooling and quick-drying, and at the same time can maintain good mechanical properties and environmental friendly characteristics.

[0006] The present invention provides a bio-based PEF fiber with a cool feeling and quick-drying function, which is made by spinning a bio-based polyethylene 2,5-furandicarboxylate having epoxy groups and sulfonic acid groups; the bio-based PEF fiber has a profiled fiber cross-section and / or a hollow structure.

[0007] In an embodiment of the present invention, the bio-based PEF fiber has a triangular, Y-shaped, hexagonal or octagonal cross-section, and / or, the bio-based PEF fiber has a porous hollow structure.

[0008] The present invention provides a method for preparing a bio-based PEF fiber with a cool feeling and quick-drying function, comprising the following steps:

[0009] S1. Provide bio-based polyethylene 2,5-furandicarboxylate particles having epoxy groups and sulfonic acid groups;

[0010] S2. Perform melt spinning or solution spinning on the bio-based polyethylene 2,5-furandicarboxylate particles having epoxy groups and sulfonic acid groups, and use a profiled hole and / or hollow structure spinneret assembly in the spinning to obtain a bio-based PEF fiber with a cool feeling and quick-drying function.

[0011] In an embodiment of the present invention, the step S1 includes:

[0012] S11. Use plant fibers and / or biomass waste, and prepare PEF particles by chemical synthesis or biological fermentation;

[0013] S12. Graft epoxy groups and sulfonic acid groups onto the PEF particles in a solvent, and remove the solvent to obtain bio-based polyethylene 2,5-furandicarboxylate particles having epoxy groups and sulfonic acid groups.

[0014] In an embodiment of the present invention, the step S11 includes:

[0015] S111. Prepare 5-hydroxymethylfurfural from biomass waste by biological fermentation, and then catalytically oxidize it to generate 2,5-furandicarboxylic acid;

[0016] S112. Crystallize the 2,5-furandicarboxylic acid, precipitate a crystallization product, and obtain 2,5-furandicarboxylic acid particles after drying;

[0017] S113. Perform an esterification reaction on the 2,5-furandicarboxylic acid particles and ethylene glycol to obtain a reaction product;

[0018] S114. Filter the reaction product, and wash it with water until the pH value of the washing liquid is neutral; dry the washed reaction product, the drying temperature is 80-90 °C, and the drying time is 10-12 hours to obtain PEF particles.

[0019] In an embodiment of the present invention, in step S12, the PEF particles are first dissolved in N,N-dimethylformamide and reacted with epihaloalkane at 0.5-2 mol / L. The reaction temperature is controlled at 50-80 °C, and the reaction time is 6-10 hours to obtain an epoxidized product.

[0020] In an embodiment of the present invention, in step S12, a 1-2 mol / L sulfuric acid solution is added to the epoxidized product, and the reaction is carried out at a temperature of 0-10 °C. After separation, bio-based polyethylene 2,5-furandicarboxylate particles having epoxy groups and sulfonic acid groups are obtained.

[0021] In an embodiment of the present invention, in step S2, the bio-based polyethylene 2,5-furandicarboxylate particles having epoxy groups and sulfonic acid groups are melt-spun. The temperature of the melt spinning is 260-280 °C, and the vehicle speed is 1000-1400 m / min.

[0022] In an embodiment of the present invention, in step S2, the fibers obtained by melt spinning are cooled by a cooling roller at a cooling temperature of 20-25 °C, and then wound into a fiber roll and cut by a cutting machine to obtain bio-based PEF fibers having a cooling sensation and a quick-drying function.

[0023] The present invention provides a fabric, comprising: the bio-based PEF fibers having a cooling sensation and a quick-drying function as described above, or the bio-based PEF fibers obtained by the preparation method described above.

[0024] Currently, the methods for achieving the cooling sensation function for ordinary fiber fabrics on the market include: adding materials with high thermal conductivity, such as natural minerals like jade powder, shell powder, mica powder, etc., to the fibers after being processed by nanotechnology during the spinning process to improve the thermal conductivity of the fibers; or attaching cooling microcapsules or cooling finishing agents (such as xylitol, erythritol, etc.) to the textile fabrics by means of impregnation, padding, or coating to endow them with an instant cooling sensation function. However, the existing cooling fabrics on the market have problems such as non-persistent cooling effect, poor fiber strength due to excessive addition of additives, insufficient comfort, powder shedding phenomenon, and peculiar smell.

[0025] Compared with the prior art, the present invention uses a bio-based polyethylene 2,5-furandicarboxylate with epoxy groups and sulfonic acid groups to improve hydrophilicity, and constructs PEF fibers with a profiled cross-section and / or a hollow structure to achieve a cooling sensation, thereby enhancing the moisture absorption and quick-drying effect of the fibers. This design of the present invention can not only improve the heat dissipation effect of the fibers, but also improve their moisture absorption and quick-drying effect, thus achieving a dual improvement in the cooling and quick-drying functions. The technical solution of the present invention can take into account other properties such as mechanical properties and biodegradability when preparing PEF fibers with cooling and quick-drying functions. This not only improves the comprehensive performance of the fibers, but also makes their applications in various special fields more extensive. Generally speaking, compared with the prior art, the present invention not only achieves a dual improvement in the cooling and quick-drying functions, but also has excellent comprehensive performance, low cost, and high practical value.

[0026] In addition, the preparation process of the present invention is simple and does not require complex processes and equipment. This not only reduces the production cost, but also makes its application in industrial production more extensive. At the same time, the preparation process of the present invention can effectively maintain the mechanical properties and biodegradability of the bio-based PEF fibers, thus achieving a balance of excellent comprehensive performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a cross-sectional view of the fiber of Example 1 of the present invention;

[0028] Figure 2 It is a cross-sectional view of the fiber of Example 2 of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0029] In order to more clearly understand the technical features, objectives, and effects of the present invention, the technical solutions of the present invention will be described in detail below with reference to specific embodiments. The described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments.

[0030] The present invention provides a bio-based PEF fiber with cooling and quick-drying functions, which is made by spinning a bio-based polyethylene 2,5-furandicarboxylate with epoxy groups and sulfonic acid groups; the bio-based PEF fiber has a profiled fiber cross-section and / or a hollow structure.

[0031] Correspondingly, an embodiment of the present invention provides a method for preparing a bio-based PEF fiber with cooling and quick-drying functions, including the following steps:

[0032] S1. Provide bio-based polyethylene 2,5-furandicarboxylate particles with epoxy groups and sulfonic acid groups;

[0033] S2. Melt-spin or solution-spin the bio-based poly(ethylene 2,5-furandicarboxylate) particles having epoxy groups and sulfonic acid groups, and use a spinneret assembly with profiled holes and / or a hollow structure during the spinning to obtain bio-based PEF fibers with a cooling sensation and quick-drying function.

[0034] The bio-based PEF fibers prepared by the present invention have a cooling sensation and quick-drying effect, and at the same time can maintain good mechanical properties and environmental friendly characteristics, which is conducive to its wide application.

[0035] In the examples of the present invention, bio-based poly(ethylene 2,5-furandicarboxylate) (PEF) particles having epoxy groups and sulfonic acid groups are first prepared, and the specific steps are as follows:

[0036] S11. Use plant fibers and / or biomass waste, and prepare PEF particles by chemical synthesis or biological fermentation.

[0037] S12. Graft epoxy groups and sulfonic acid groups onto the PEF particles in a solvent, and remove the solvent to obtain bio-based PEF particles having epoxy groups and sulfonic acid groups.

[0038] Preferably, the step S11 is mainly a chemical synthesis process step, and the specific steps are as follows:

[0039] S111. Dissolve 5-hydroxymethylfurfural (HMF) (source: Donghua University) prepared by fermenting biomass such as corn straw or sugarcane bagasse in deionized water, add a catalyst copper nitrate or copper chloride (5% wt) to the solution, and carry out an oxidation reaction at 80 - 140 °C for 6 - 10 hours to generate 2,5-furandicarboxylic acid (FDCA).

[0040] S112. Cool to room temperature, add an appropriate amount of organic solvent ethanol to promote the crystallization and precipitation of 2,5-furandicarboxylic acid. The precipitated crystalline product can be placed in a vacuum drying oven for drying. The drying temperature can be 80 - 90 °C, and the drying time is 10 - 12 hours to obtain dried FDCA particles.

[0041] S113. Mix the obtained FDCA particles with ethylene glycol (molecular weight 600 - 10000 g / mol) in a ratio of 1:1.6 - 2, add a catalyst (0.1% wt) and a heat stabilizer (0.1% wt), and carry out an esterification reaction at 190 - 200 °C for 2 - 4 h under a pressure of 120 - 180 kPa to obtain a reaction product. The above catalysts include one or more of tetrabutyl titanate, tetrabutyl orthotitanate, and isopropyl titanate. The above heat stabilizers include one or more of antioxidant 1010, antioxidant 1076, antioxidant 425, and antioxidant 330.

[0042] S114. After the reaction is completed, the reaction kettle can be cooled to room temperature. The reaction product is filtered and washed with water (preferably deionized water) multiple times until the pH value of the washing liquid is neutral. The washed reaction product can be placed in a vacuum drying oven for drying. The drying temperature can be 80 - 90 °C, and the drying time is 10 - 12 hours, thus obtaining dried bio - based PEF particles.

[0043] After obtaining the PEF particles, the present invention embodiment grafts epoxy groups and sulfonic acid groups (-SO3H). The present invention embodiment preferably grafts epoxy groups first and then sulfonic acid groups. The step S12 specifically includes:

[0044] S121. The PEF particles can be placed in a reaction kettle and dissolved with N,N - dimethylformamide (DMF). Preferably, it is stirred to form a uniform solution. Preferably, epichlorohydrin with a concentration of 0.5 - 2 mol / L is added for reaction. The reaction temperature can be controlled at 50 - 80 °C, and the reaction time is 6 - 10 hours to obtain an epoxidized product.

[0045] S122. A sulfuric acid solution with a concentration of 1 - 2 mol / L is added to the epoxidized product. Preferably, the reaction is carried out at a temperature of 0 - 10 °C, and the reaction time can be 2 - 4 hours. Then the temperature is gradually raised to room temperature (generally 20 - 30 °C), and the sulfonation reaction continues for 6 - 10 hours to ensure that the sulfonic acid groups are fully grafted onto the PEF molecular chain.

[0046] S123. After the reaction is completed, preferably, the sulfonated reaction product is filtered and separated, and washed with water multiple times until the pH value of the washing liquid is neutral.

[0047] The washed reaction product can be placed in a vacuum drying oven. The drying temperature is preferably 80 - 90 °C, and the drying time is 10 - 12 hours to obtain bio - based poly(ethylene 2,5 - furandicarboxylate) (PEF) particles with epoxy groups and sulfonic acid groups. The grafting amount of epoxy groups can be 4% - 5%, and the grafting amount of sulfonic acid groups is 4% - 5%.

[0048] The present invention mainly grafts epoxy groups and sulfonic acid groups onto the molecular chain of poly(ethylene 2,5 - furandicarboxylate), which is beneficial to improving the hydrophilicity of the fiber, thereby enhancing the moisture absorption and quick - drying performance of the fiber. And through the interaction force between these groups and water molecules, a water film is formed, improving the cool - feeling performance of the fiber.

[0049] After obtaining the PEF particles grafted with epoxy groups and sulfonic acid groups, the present invention embodiment preferably adopts the melt - spinning method to obtain bio - based PEF fibers with cool - feeling and quick - drying functions. This method simplifies the process and equipment, facilitating large - scale production.

[0050] In step S2 of the embodiments of the present invention, a profiled hole and / or a hollow structure spinneret assembly is used in the melt or solution spinning; specifically, step S2 includes:

[0051] S21. The PEF particles grafted with epoxy groups and sulfonic acid groups can be melted by a screw extrusion device and extruded through a spinneret assembly with profiled hole structures such as triangles and hexagons, and the as-spun fibers are obtained after solidification; the temperature of the melt spinning is preferably 260-280°C, and the spinning speed is 1000-1400 m / min;

[0052] S22. Preferably, the as-spun fibers are cooled by a cooling roller, the cooling temperature is 20-25°C, and then wound into a fiber roll;

[0053] S23. The wound fiber roll can be cut by a cutting machine, and the cutting length is, for example, 5 mm, to obtain bio-based polyethylene 2,5-furandicarboxylate (PEF) fibers with a cooling sensation and quick-drying function. For example, the PEF fiber specifications are 50D / 48F, 50D / 72F, 75D / 48F, 75D / 72F, etc., and the fiber strength is 50-80 cN / tex.

[0054] In some embodiments of the present invention, the bio-based PEF fibers have a triangular or hexagonal cross-section; by adopting a profiled cross-section design (such as triangular, Y-shaped, hexagonal, octagonal fiber cross-sections), the surface area of the fibers can be increased, promoting the realization of the cooling sensation. And, the bio-based PEF fibers can also have a hollow structure (which can be a porous hollow structure) longitudinally, forming more micropores during the weaving process, which is beneficial to the rapid transmission of moisture and further improving the quick-drying effect.

[0055] The embodiments of the present invention adopt simplified process flows such as melt spinning or solution spinning, reducing the production cost while ensuring the fiber properties and improving the feasibility of industrial production.

[0056] The present invention provides a fabric, including: the bio-based PEF fibers with a cooling sensation and quick-drying function as described above, or the bio-based PEF fibers obtained by the preparation method.

[0057] The embodiments of the present invention have no special restrictions on the specifications, fabric types, tissue structures, etc. of the fabric, and it is mainly a knitted garment fabric. In some embodiments, the fabric types are plain cloth, double-sided cloth, etc., and the gram weight can be 80-250 g / m 2 .

[0058] Based on the characteristic functions of the bio-based PEF fibers, the fabric provided by the present invention has properties such as a cooling sensation and good moisture absorption and quick-drying.

[0059] To better illustrate the present invention, further examples are given below. In the examples, all the original reagents and materials are commercially available, and the experimental methods without specific experimental conditions are the conventional methods and conditions well-known in the art. Unless otherwise specified, all are in parts by mass or mass ratio. 5-Hydroxymethylfurfural (HMF) is from Donghua University and is prepared by biological fermentation from biomass such as corn straw or sugarcane bagasse.

[0060] Example 1

[0061] Step 1: Prepare bio-based poly(ethylene 2,5-furandicarboxylate) (PEF) particles; the specific steps are as follows: 1.1 Dissolve 100 parts of HMF in deionized water, add 5 parts of copper nitrate catalyst, and carry out an oxidation reaction at 120 °C for 6 hours to produce 2,5-furandicarboxylic acid (FDCA).

[0062] 1.2 Cool to room temperature, add an appropriate amount of organic solvent ethanol to promote the crystallization and precipitation of FDCA. The precipitated crystalline product can be placed in a vacuum drying oven for drying. The drying temperature is 80 °C and the drying time is 12 hours to obtain dried FDCA particles.

[0063] 1.3 Mix 100 parts of FDCA particles with 200 parts of ethylene glycol, add 0.1 part of tetrabutyl titanate and 0.1 part of antioxidant 1010, and carry out an esterification reaction at 190 °C for 4 h under a pressure of 150 kPa to obtain a reaction product.

[0064] 1.4 After the reaction is completed, cool the reaction kettle to room temperature, filter the reaction product, and wash it with deionized water for multiple times until the pH value of the washing liquid is neutral. Place the washed reaction product in a vacuum drying oven, with a drying temperature of 80 °C and a drying time of 12 hours to obtain dried bio-based PEF particles. Step 2: Graft epoxy groups and sulfonic acid groups; the specific steps are as follows:

[0065] 2.1 Put 100 parts of PEF particles into a reaction kettle, dissolve them with DMF to form a homogeneous solution. Add 5 parts of epichlorohydrin with a concentration of 1 mol / L, and control the reaction temperature at 60 °C for 8 hours.

[0066] 2.2 Add 5 parts of sulfuric acid solution with a concentration of 1 mol / L, control the reaction temperature at 10 °C for 2 hours; gradually raise the temperature to room temperature and continue the reaction for 6 hours to obtain a reaction product with sulfonic acid groups fully grafted onto the PEF molecular chain.

[0067] 2.3 After the reaction is completed, cool the reaction kettle to room temperature, filter the reaction product, and wash it with deionized water for multiple times until the pH value of the washing liquid is neutral.

[0068] 2.4 Put the washed reaction product into a vacuum drying oven. The drying temperature is 80 °C and the drying time is 12 hours to obtain dried bio-based PEF particles with epoxy groups and sulfonic acid groups. The epoxy group content is 4.26% and the sulfonic acid group content is 4.52%.

[0069] Step 3: Melt spinning method; the specific steps are as follows:

[0070] 3.1 Melt the dried bio-based PEF particles with epoxy groups and sulfonic acid groups by screw extrusion and use a Y-shaped spinneret. The spinning temperature is 260 °C and the spinning speed is 1000 m / min.

[0071] 3.2 Cool the as-spun fibers through a cooling roller. The cooling temperature is 20 °C, and then wind them into a fiber roll.

[0072] 3.3 Cut the wound fibers with a cutting machine. The cutting length is 5 mm to obtain bio-based PEF fibers with a cool feeling and quick-drying function; the fiber specification is 75D / 48F and the strength is 65 cN / tex. The cross-section of the bio-based PEF fiber is as Figure 1 shown, with a Y-shaped cross-section.

[0073] Example 2

[0074] Step 1: Prepare bio-based poly(ethylene 2,5-furandicarboxylate) (PEF) particles; the specific steps are as follows: 1.1 Dissolve 100 parts of HMF in deionized water, add 5 parts of the catalyst copper nitrate, and carry out an oxidation reaction at 100 °C for 8 hours to generate 2,5-furandicarboxylic acid (FDCA);

[0075] 1.2 Cool to room temperature, add an appropriate amount of the organic solvent ethanol to promote the crystallization and precipitation of FDCA. The precipitated crystalline product can be put into a vacuum drying oven for drying. The drying temperature is 90 °C and the drying time is 10 hours to obtain dried FDCA particles;

[0076] 1.3 Mix 100 parts of FDCA particles with 200 parts of ethylene glycol, add 0.1 part of tetrabutyl titanate and 0.1 part of antioxidant 1010, and carry out an esterification reaction at 195 °C for 3 h under a pressure of 150 kPa to obtain a reaction product.

[0077] 1.4 After the reaction is completed, cool the reaction kettle to room temperature, filter the reaction product, and wash it with deionized water multiple times until the pH value of the washing liquid is neutral. Put the washed reaction product into a vacuum drying oven. The drying temperature is 90 °C and the drying time is 10 hours to obtain dried bio-based PEF particles.

[0078] Step 2: Graft epoxy groups and sulfonic acid groups; the specific steps are as follows:

[0079] 2.1 Put 100 parts of PEF particles into a reaction kettle, dissolve them with DMF to form a uniform solution. Add 5 parts of epichlorohydrin with a concentration of 1 mol / L, control the reaction temperature at 70 °C, and the reaction time is 6 hours.

[0080] 2.2 Add 5 parts of sulfuric acid solution with a concentration of 1.5 mol / L, control the reaction temperature at 5 °C, and the reaction time is 3 hours; gradually raise the temperature to room temperature and continue the reaction for 6 hours to obtain a reaction product with sulfonic acid groups fully grafted onto the PEF molecular chain.

[0081] 2.3 After the reaction is completed, cool the reaction kettle to room temperature, filter the reaction product, and wash it with deionized water multiple times until the pH value of the washing liquid is neutral.

[0082] 2.4 Put the washed reaction product into a vacuum drying oven, the drying temperature is 90 °C, and the drying time is 10 hours to obtain dried bio-based PEF particles with epoxy groups and sulfonic acid groups. The epoxy group content is 4.35%, and the sulfonic acid group content is 4.48%.

[0083] Step Three: Melt spinning method; the specific steps are as follows:

[0084] 3.1 Melt the dried bio-based PEF particles with epoxy groups and sulfonic acid groups by screw extrusion, and use an octagonal hollow spinneret. The spinning temperature is 270 °C, and the spinning speed is 1200 m / min.

[0085] 3.2 Cool the as-spun fibers through a cooling roller, the cooling temperature is 25 °C, and then wind them into a fiber roll.

[0086] 3.3 Cut the wound fibers through a cutting machine, the cutting length is 5 mm, to obtain bio-based PEF fibers with a cool feeling and quick-drying function (the fiber octagonal hollow structure is as Figure 2 shown); the fiber specification is 50D / 72F, and the strength is 60 cN / tex. Figure 1 and Figure 2 are scanning electron microscope (SEM) images of 20 μm and 40 μm respectively. In the fiber specification, the higher the D value and F value, the stronger the fiber strength. A lower D value means the fiber is finer and can provide better softness and touch. To ensure strength, in Example 2, when the specification is 50D, it is paired with 72F.

[0087] Weave the bio-based PEF fibers of Example 1 and Example 2 to obtain a plain knitted fabric (general specification, weaving has the least impact on the test results). The performance of the obtained fabric is shown below.

[0088] Table 1 Performance of the fabric samples of the embodiments of the present invention

[0089]

[0090] The performance detection method is as follows:

[0091] 1. The Qmax value (contact cool feeling coefficient) is tested according to the national standard GB / T 35263-2017 "Testing and Evaluation of Textiles' Contact Instantaneous Cool Feeling Performance", with the test environment temperature of 20°C and humidity of 55%.

[0092] 2. The moisture absorption rate is tested according to ASTM D2574 "Standard Test Method for Moisture Absorption of Textiles", with the environment temperature of 20°C and humidity of 65%.

[0093] The Qmax value of the conventional bio-based PEF fiber without any modification is lower than 0.15 W / cm 2 , (When the Qmax value reaches 0.15 W / cm 2 or above, it can be considered as a fabric with obvious cool feeling effect. This fabric can conduct heat from the human body more quickly when contacting the skin, giving people an obvious cool feeling), such fibers will not have additional cool feeling and quick-drying functions. Therefore, problems such as the wearer feeling stuffy and uncomfortable may occur in actual applications, especially in high-temperature and humid environments.

[0094] For the fibers on the market that have added high thermal conductivity materials or cool feeling finishing agents, the cool feeling effect is usually not persistent (the cool feeling performance decreases after using for a period of time), and there may be problems such as a decrease in fiber strength, insufficient comfort, and powder dropping and peculiar smell.

[0095] From the above examples and comparisons, it can be seen that through specific chemical modification and physical structure design, the present application realizes the synergistic effect of the cool feeling and quick-drying functions of the bio-based PEF fiber, while maintaining good mechanical properties and environmental friendliness, and obtaining excellent functional effects.

[0096] The above examples are only used to illustrate the technical characteristics and implementation process of the present invention, rather than limiting the technical solutions of the present invention. It should be pointed out that for those of ordinary skill in the art, the present invention can still be modified or equivalently replaced, and the modifications or replacements that do not depart from the principle of the present invention are all covered by the protection of the present invention.

Claims

1. A bio-based PEF fiber with a cooling and quick-drying function, characterized in that, It is made by spinning a bio-based polyethylene 2,5-furandicarboxylate having epoxy groups and sulfonic acid groups; the bio-based PEF fiber has a profiled fiber cross-section and / or a hollow structure.

2. The bio-based PEF fiber according to claim 1, characterized in that, The bio-based PEF fiber has a triangular, Y-shaped, hexagonal or octagonal cross-section, and / or the bio-based PEF fiber has a porous hollow structure.

3. A preparation method of a bio-based PEF fiber with a cooling sensation and a quick-drying function, characterized in that, It includes the following steps: S1. Provide bio-based polyethylene 2,5-furandicarboxylate particles having epoxy groups and sulfonic acid groups; S2. Melt-spin or solution-spin the bio-based polyethylene 2,5-furandicarboxylate particles having epoxy groups and sulfonic acid groups, and use a profiled hole and / or hollow structure spinneret assembly in the spinning to obtain a bio-based PEF fiber with a cool feeling and quick-drying function.

4. The preparation method according to claim 3, characterized in that, The step S1 includes: S11. Use plant fibers and / or biomass waste, and prepare PEF particles by chemical synthesis or biological fermentation; S12. Graft epoxy groups and sulfonic acid groups to the PEF particles in a solvent, and remove the solvent to obtain bio-based polyethylene 2,5-furandicarboxylate particles having epoxy groups and sulfonic acid groups.

5. The preparation method according to claim 4, wherein The step S11 includes: S111. Prepare 5-hydroxymethylfurfural from biomass waste by biological fermentation, and then catalytically oxidize it to generate 2,5-furandicarboxylic acid; S112. Crystallize the 2,5-furandicarboxylic acid, precipitate the crystallization product, and obtain 2,5-furandicarboxylic acid particles after drying; S113. Carry out an esterification reaction between the 2,5-furandicarboxylic acid particles and ethylene glycol to obtain a reaction product; S114. Filter the reaction product, and wash it with water until the pH value of the washing liquid is neutral; dry the washed reaction product, the drying temperature is 80-90 °C, and the drying time is 10-12 hours to obtain PEF particles.

6. The preparation method according to claim 5, characterized in that, In the step S12, the PEF particles are first dissolved in N,N-dimethylformamide and reacted with 0.5-2 mol / L epoxy haloalkane, the reaction temperature is controlled at 50-80 °C, and the reaction time is 6-10 hours to obtain an epoxidized product.

7. The preparation method according to claim 6, characterized in that, In the step S12, add 1-2 mol / L sulfuric acid solution to the epoxidized product, carry out the reaction at a temperature of 0-10 °C, and after separation, obtain bio-based polyethylene 2,5-furandicarboxylate particles having epoxy groups and sulfonic acid groups.

8. The preparation method according to any one of claims 3-7, characterized in that, In the step S2, melt-spin the bio-based polyethylene 2,5-furandicarboxylate particles having epoxy groups and sulfonic acid groups, the temperature of the melt-spinning is 260-280 °C, and the vehicle speed is 1000-1400 m / min.

9. The preparation method according to claim 8, characterized in that, In the step S2, the fiber obtained by melt-spinning is cooled by a cooling roller, the cooling temperature is 20-25 °C, then wound into a fiber roll, and then cut by a cutting machine to obtain a bio-based PEF fiber with a cool feeling and quick-drying function.

10. A fabric, characterized in that, It includes: The bio-based PEF fiber with a cool feeling and quick-drying function described in claim 1 or 2, or the bio-based PEF fiber obtained by the preparation method described in any one of claims 3-8.

Images