Antibacterial cool-feeling polyester fiber containing plant extract, textile and preparation method of antibacterial cool-feeling polyester fiber

Abstract

The invention belongs to the technical field of textiles, and particularly discloses an antibacterial cool-feeling polyester fiber containing plant extracts, a textile and a preparation method of the antibacterial cool-feeling polyester fiber. The antibacterial cool-feeling polyester fiber containing the plant extract comprises polyester and composite functional cellulose aerogel, the composite functional cellulose aerogel comprises cellulose aerogel, aluminum nitride and the plant extract, the aluminum nitride and the plant extract are loaded on the cellulose aerogel, and the plant extract comprises polygonum cuspidatum extract. The polyester fiber has a good antibacterial cool feeling characteristic and can be widely applied to the fields of household articles, clothes and the like.

Description

Technical Field

[0001] The invention relates to the technical field of textiles, in particular to an antibacterial cool polyester fiber containing plant extracts, textiles and a preparation method thereof. Background Art

[0002] With the development of society and the improvement of people's living standards, functional textiles are increasingly sought after by consumers. While satisfying the need for comfort, textiles are also required to protect and regulate human body temperature during use. Polyester fiber (PET), commonly known as polyester, has the functions of high breaking strength, good wear resistance, easy washing and quick drying, and is currently the most industrially produced and used synthetic fiber in textile materials. However, the PET material itself has a low thermal conductivity (0.084W / (m℃) and poor moisture absorption capacity (moisture regain 0.2wt%). When used in summer clothing, there are problems such as a strong feeling of stuffiness and bacterial growth on the surface of the material after sweating. Therefore, the development of safe, environmentally friendly, antibacterial, and cool PET fibers can not only meet consumers' requirements for functional fibers, but also increase product added value and enhance market competitiveness. Summary of the invention

[0003] In view of the shortcomings of the prior art described above, the object of the present invention is to provide an antibacterial cool polyester fiber containing plant extracts, textiles and a preparation method thereof, which are used to solve the problems of low thermal conductivity, poor moisture absorption capacity and weak antibacterial performance of textiles made of polyester fibers in the prior art.

[0004] To achieve the above-mentioned object and other related objects, the present invention provides an antibacterial cool polyester fiber containing plant extracts, comprising polyester and composite functional cellulose aerogel, wherein the composite functional cellulose aerogel comprises cellulose aerogel and aluminum nitride and plant extract loaded on the cellulose aerogel, wherein the plant extract comprises a knotweed extract.

[0005] Furthermore, in the antibacterial cooling polyester fiber of the plant extract, the mass ratio of polyester to the composite functional cellulose aerogel is 0.1-0.8:8-20.

[0006] Furthermore, the composite functional cellulose aerogel is made of aluminum nitride, plant extract and cellulose hydrogel in a mass ratio of 1 to 10:1 to 20:100.

[0007] Furthermore, the particle size of the composite functional cellulose aerogel is less than or equal to 1 micron.

[0008] Furthermore, the antibacterial cool polyester fiber containing plant extracts is filament or staple fiber.

[0009] The present invention also provides a method for preparing an antibacterial cool feeling polyester fiber containing a plant extract, comprising the following steps:

[0010] Aluminum nitride, plant extract and cellulose hydrogel are mixed to prepare cellulose aerogel loaded with aluminum nitride and plant extract; the plant extract includes Polygonum cuspidatum extract;

[0011] The cellulose aerogel loaded with aluminum nitride and plant extract is mixed with polyester to prepare a functional polyester masterbatch;

[0012] The functional polyester masterbatch is blended with polyester and spun to obtain the antibacterial cool polyester fiber containing plant extracts.

[0013] Furthermore, the mass ratio of the aluminum nitride, the plant extract and the cellulose hydrogel is 1-10:1-20:100.

[0014] Furthermore, the aluminum nitride is selected from aluminum nitride nanopowder, and the particle size is 300nm to 500nm.

[0015] Furthermore, the solid content of the Polygonum cuspidatum extract is 5wt% to 10wt%. Preferably, the Polygonum cuspidatum extract is an ethanol solution with a solid content of 5wt% to 10wt%.

[0016] Furthermore, the Polygonum cuspidatum extract is an alcohol extract of Polygonum cuspidatum, preferably an ethanol extract of Polygonum cuspidatum.

[0017] Furthermore, the cellulose hydrogel contains 4wt% to 10wt% of cellulose fibers.

[0018] Furthermore, the particle size of the cellulose aerogel loaded with aluminum nitride and plant extract is less than or equal to 1 micron.

[0019] Furthermore, the mass ratio of the cellulose aerogel loaded with aluminum nitride and plant extract to the polyester is 1-8:85-95.

[0020] Furthermore, the cellulose aerogel loaded with aluminum nitride and plant extracts is mixed with polyester and additives to prepare functional polyester masterbatch, wherein the additives include dispersants, heat stabilizers, antioxidants and / or anti-phenol yellowing agents.

[0021] Furthermore, the mass ratio of the cellulose aerogel loaded with aluminum nitride and plant extract, polyester and auxiliary agent is 1-8:85-95:1-8.

[0022] Furthermore, the mass ratio of the functional polyester masterbatch to the polyester is 1:8-20.

[0023] Furthermore, the spinning temperature is 275°C to 280°C.

[0024] The present invention provides a textile, comprising the antibacterial cool feeling polyester fiber containing plant extracts as described above and / or the antibacterial cool feeling polyester fiber containing plant extracts obtained by the method as described above.

[0025] As described above, the antibacterial cool polyester fiber containing plant extracts, textiles and preparation methods thereof of the present invention have the following beneficial effects:

[0026] The present invention adopts cellulose aerogel with a porous structure and strong adsorption function as a carrier to load aluminum nitride and plant extracts (such as knotweed extracts), and blends them with polyester to form functional polyester masterbatch. The functional polyester masterbatch and polyester are then melt-spun to form a new type of polyester fiber with antibacterial and cooling functions. The physical indicators of the product can meet the requirements of the first-class product of GB / T14464-2017 "Polyester Staple Fiber". The fiber has excellent wearing performance and good textile processing performance, and can be widely used in household items, clothing and other fields. DETAILED DESCRIPTION

[0027] The following describes the embodiments of the present invention through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention.

[0028] An embodiment of the present invention provides an antibacterial cool polyester fiber containing plant extracts, comprising polyester and composite functional cellulose aerogel, wherein the composite functional cellulose aerogel comprises cellulose aerogel and aluminum nitride and plant extracts loaded on the cellulose aerogel, wherein the plant extract comprises a knotweed extract.

[0029] Giant knotweed rhizome is a traditional Chinese medicine, which is the dried rhizome and root of the Polygonum cuspidatum plant. The main chemical components of giant knotweed include: emodin, molecular formula C 15 H 10 O5, molecular weight 270.23, melting point 256-257°C; Chrysophanol, molecular formula C 15 H 10 O4, molecular weight 254.23, melting point 196℃; Emodin monomethyl ether, molecular formula C 16 H 12 O5, molecular weight 284.26, melting point 207°C; Resveratol, molecular formula C 14 H 12O3, melting point 256-257℃; Polydatin, molecular formula C 20 H 22 O8, molecular weight 390.40, melting point 223-226°C, etc. These ingredients have good chemical stability, high melting point and thermal decomposition temperature, not only have antioxidant, antiviral, antibacterial, anticancer, liver protection and other functions, but also their basic physical and chemical properties can meet the requirements of polyester.

[0030] Aluminum nitride has high thermal conductivity, good mechanical properties, and stable chemical properties. Aerogels are biodegradable, highly efficient, and highly adsorbable, and can be used to load a variety of functional components. The use of natural cellulose materials to prepare aerogels for the adsorption of various components not only meets the needs of production practice, but also achieves the reuse of waste cellulose materials. Cellulose aerogels are used as carriers to adsorb antibacterial functional components, such as knotweed extracts, and cooling functional components, such as aluminum nitride nanopowders, and are blended with polyester chips to form functional polyester masterbatches. The functional polyester masterbatches are then mixed with ordinary polyester chips for melt spinning to produce polyester fibers with antibacterial and cooling functions. The fibers are made into fabrics, which have good market prospects in the fields of household goods and clothing.

[0031] In some embodiments, the plant extract is selected from Polygonum cuspidatum extract. In addition, it is not excluded that other plant extracts can also be selected, and other plant extracts and Polygonum cuspidatum extract can improve the performance of polyester fiber through synergistic effect.

[0032] In some embodiments, in the antibacterial cooling polyester fiber of the plant extract, the mass ratio of polyester to composite functional cellulose aerogel is 0.1-0.8:8-20. The content of composite functional cellulose aerogel should not be too high, because excessive dosage will not play a significant role in improving the antibacterial cooling function of the polyester fiber, and will also have a negative impact on the physical properties of the polyester fiber, and even make it impossible to melt-spin.

[0033] In some embodiments, the composite functional cellulose aerogel is made of aluminum nitride, plant extract and cellulose hydrogel in a mass ratio of 1 to 10:1 to 20:100.

[0034] In some embodiments, the particle size of the composite functional cellulose aerogel is less than or equal to 1 micron.

[0035] The present invention mixes aluminum nitride, plant extracts and cellulose hydrogel (i.e., cellulose aqueous suspension) in a certain proportion to prepare cellulose hydrogel loaded with the above functional components, and then freeze-drying and other methods to prepare cellulose aerogel, which is further processed into aerogel powder with a particle size of ≤1 μm. Cellulose aerogel has a porous structure and strong adsorption function. As a carrier, it can load more aluminum nitride and plant extracts. When aerogel powder with a small particle size (≤1 μm) is mixed with polyester to prepare fibers, the antibacterial and cooling functions will be more durable.

[0036] In some embodiments, the antibacterial cooling polyester fiber containing plant extracts is filament or staple fiber. The present invention does not have any special requirements on the specifications of the polyester fiber, and the polyester fiber can be made into filament or staple fiber of different specifications according to actual needs.

[0037] Another embodiment of the present invention provides a method for preparing the antibacterial cool feeling polyester fiber containing plant extracts as described above, comprising the following steps:

[0038] Aluminum nitride, plant extract and cellulose hydrogel are mixed to prepare cellulose aerogel loaded with aluminum nitride and plant extract; the plant extract includes Polygonum cuspidatum extract;

[0039] The cellulose aerogel loaded with aluminum nitride and plant extract is mixed with polyester to prepare a functional polyester masterbatch;

[0040] The functional polyester masterbatch is blended with polyester and spun to obtain the antibacterial cool polyester fiber containing plant extracts.

[0041] In some embodiments, the mass ratio of the aluminum nitride, the plant extract and the cellulose hydrogel is 1-10:1-20:100.

[0042] In some embodiments, aluminum nitride, plant extracts and cellulose hydrogels are mixed under ultrasound to prepare cellulose hydrogels loaded with aluminum nitride and plant extracts, which are freeze-dried and crushed to prepare cellulose aerogels loaded with aluminum nitride and plant extracts. The ultrasonic power is, for example, 1000w to 1400w, the ultrasonic frequency is, for example, 20kHz to 30kHz, the ultrasonic treatment time is, for example, 40min to 60min, and the crushing method is, for example, air flow crushing.

[0043] In some embodiments, the aluminum nitride is selected from aluminum nitride nanopowder (i.e., aluminum nitride powder), and the particle size is 300 nm to 500 nm. The particle size of the aluminum nitride nanopowder in this particle size range is smaller than the pores of the cellulose aerogel, which is conducive to loading more aluminum nitride nanopowder in the pores of the cellulose aerogel, thereby increasing the loading rate and further enhancing the cooling function.

[0044] In some embodiments, the aluminum nitride nanopowder is prepared by direct nitridation, that is, in a high-temperature nitrogen atmosphere, aluminum powder is directly combined with nitrogen to generate aluminum nitride powder, the chemical reaction formula is 2Al(s)+N2(g)→2AlN(s), and the reaction temperature is 800°C to 1200°C.

[0045] In some embodiments, the preparation method of the aluminum nitride nanopowder comprises: mixing and grinding metal aluminum powder and chitosan quaternary ammonium salt at 700°C to 800°C, then heating to 800°C to 1200°C, evacuating, decomposing the chitosan quaternary ammonium salt to produce N2, and N2 enters the lattice of the metal aluminum powder to form aluminum nitride nanopowder. Wherein, the mass ratio of metal aluminum powder, distearylethylenediamine and chitosan quaternary ammonium salt is, for example, 1:1 to 2, the grinding time is, for example, 23h to 25h, and the vacuum holding time is, for example, 0.5h to 1h.

[0046] In some embodiments, during the preparation of the aluminum nitride nanopowder, a dispersant is further added. The dispersant is, for example, distearylethylenediamine. The mass ratio of the metal aluminum powder to the dispersant is, for example, 100:1-10.

[0047] In some embodiments, the solid content of the Polygonum cuspidatum extract is 5 wt% to 10 wt%. Preferably, the Polygonum cuspidatum extract is an ethanol solution with a solid content of 5 wt% to 10 wt%.

[0048] In some embodiments, the polygonum cuspidatum extract is an alcohol extract of polygonum cuspidatum, preferably an ethanol extract of polygonum cuspidatum. The ethanol extract of polygonum cuspidatum is obtained by extracting polygonum cuspidatum with ethanol. When preparing aerogel, the ethanol in the polygonum cuspidatum extract can act as a cellulose coagulant, and the interaction between ethanol molecules and cellulose macromolecules is beneficial to the preparation of the cellulose aerogel of the present invention.

[0049] In some embodiments, the method for preparing the Polygonum cuspidatum extract comprises: drying, crushing, grinding, sieving, then immersing the Polygonum cuspidatum in an ethanol solution, leaching and purifying, filtering, and obtaining the Polygonum cuspidatum extract. The root and stem of Polygonum cuspidatum can be selected to prepare the extract, the sieve used for sieving is, for example, 80 mesh, the ethanol solution is, for example, 75% ethanol solution, the bath ratio is, for example, 1:3-10, the leaching and purification temperature is, for example, 25°C-30°C, and the leaching and purification time is, for example, at least 2 days.

[0050] In some embodiments, the cellulose hydrogel contains 4 wt % to 10 wt % of cellulose fibers, and the cellulose fibers include but are not limited to cotton fibers, ramie fibers, bamboo fibers, and the like.

[0051] In some embodiments, the preparation method of the cellulose hydrogel includes: adding cellulose fibers to a NaOH / urea aqueous solution, stirring at room temperature, and then freezing to obtain a cellulose suspension; centrifuging the cellulose suspension and washing it with water until it is neutral to obtain a cellulose aqueous suspension, i.e., a cellulose hydrogel. The cellulose fibers can be dried before adding them to the NaOH / urea solution, the drying temperature is, for example, 45°C to 55°C, the drying time is, for example, at least 1 day, and the moisture content is less than 5%; the NaOH / urea aqueous solution contains, for example, 5wt% to 10wt% NaOH and 10wt% to 15wt% urea; the stirring rate is, for example, 400rpm to 600rpm, and the stirring time is, for example, 20min to 40min; the freezing temperature is, for example, -18°C, and the freezing time is, for example, 4h to 8h.

[0052] In some embodiments, the particle size of the cellulose aerogel loaded with aluminum nitride and plant extract is less than or equal to 1 micron.

[0053] In some embodiments, the mass ratio of the cellulose aerogel loaded with aluminum nitride and plant extract to the polyester is 1-8:85-95.

[0054] In some embodiments, the cellulose aerogel loaded with aluminum nitride and plant extracts is mixed with polyester and additives to prepare functional polyester masterbatch, wherein the additives include dispersants, heat stabilizers, antioxidants and / or anti-phenolic yellowing agents. Among them, the dispersant includes but is not limited to fatty acid, aliphatic amide and ester dispersants, such as vinyl bisstearamide, stearic acid monoglyceride, etc.; the heat stabilizer includes but is not limited to PET (polyester) heat stabilizer FT-4288, ThemstabSH2621, etc.; the antioxidant includes but is not limited to phenol antioxidants, phosphate antioxidants, thiol antioxidants or hydroxylamine antioxidants, etc., phenol antioxidants are for example 2,6-di-tert-butyl-4-methylphenol (2,6-Di-tert-butyl-4-methylphenol, BHT), p-Hydroxybenzoic acid (p-Hydroxybenzoic acid, BHA), tert-butyl hydroquinone (Tert-butyl hydroquinone, TBHQ, also known as tert-butyl hydroquinone), etc., phosphate antioxidants are for example triphenyl phosphite (Triphenyl Phosphite, TPP), tributyl phosphate (TriButyl Phosphate, TBP), triisodecyl phosphite (Tetraphenyl Examples of antioxidants include dipropyleneglycol diphosphate (TDP), thiol antioxidants include dioctadecyl thiodipropionate (DSTDP), didodecyl thiodipropionate (DLTDP), ditridecyl thiodipropionate (DTDTP), etc.; examples of hydroxylamine antioxidants include AO-30, AO-60, AO-80, etc.; anti-phenol yellowing agents include but are not limited to V-251, UV-1280, etc.

[0055] In some embodiments, the mass ratio of the cellulose aerogel loaded with aluminum nitride and plant extract, polyester and auxiliary agent is 1-8:85-95:1-8.

[0056] In some embodiments, the preparation method of the functional polyester masterbatch includes: blending cellulose aerogel loaded with aluminum nitride and plant extracts with polyester and additives, extruding the mixture into strips through a twin-screw extruder, cooling in a water bath, pelletizing, and pre-crystallizing to obtain the functional polyester masterbatch.

[0057] In some embodiments, the mass ratio of the functional polyester masterbatch to polyester is 1:8-20.

[0058] In some embodiments, the spinning temperature is 275°C to 280°C.

[0059] In some embodiments, melt spinning is used for spinning, including the following steps: functional polyester masterbatch and ordinary polyester chips are mixed in a certain proportion, heated, extruded, melted, and then sent to a metering pump, the melt flows through a spinning box, the melt is filtered in the spinning box and pressed into a porous spinneret by side blowing to condense and solidify into a tow fiber, and the polyester fiber is obtained by stretching and winding. During the spinning process, the winding speed can be appropriately reduced to reduce the breakage rate. If conditions permit, a surrounding wind can be used to ensure uniform cooling and molding.

[0060] Another embodiment of the present invention provides a textile, including the antibacterial cool polyester fiber containing plant extracts as described above and / or the antibacterial cool polyester fiber containing plant extracts obtained by the method as described above. The antibacterial cool polyester fiber containing plant extracts can be made into textiles alone or together with other fibers in any suitable manner, and the other fibers can be, for example, cotton fibers, ramie fibers, bamboo fibers, etc. At the same time, the present invention does not specifically limit the type of textiles, for example, it can be household items, clothing, etc., wherein household items include but are not limited to four-piece suits, sofa covers, carpets, etc., and clothing includes but is not limited to home clothes, sportswear, etc.

[0061] In addition, it should be noted that the polyester described in the present invention refers to polyethylene terephthalate (PET).

[0062] The following specific examples are given to illustrate the present invention in detail. It should also be understood that the following examples are only used to specifically illustrate the present invention and cannot be understood as limiting the scope of protection of the present invention. Some non-essential improvements and adjustments made by those skilled in the art based on the above content of the present invention belong to the scope of protection of the present invention. The specific process parameters and the like in the following examples are also only examples within a suitable range, that is, those skilled in the art can make a selection within a suitable range according to the description herein, and are not limited to the specific values ​​​​exemplified below.

[0063] Example 1

[0064] This embodiment prepares a functional polyester filament with a specification of 75D / 72F FDY. The specific preparation process is as follows:

[0065] 1. Preparation of aluminum nitride powder

[0066] Put 100g of metallic aluminum powder (purity ≥99%) into a ball mill, add 3g of distearylethylenediamine, then add 100g of chitosan quaternary ammonium salt, mix and grind at a grinding temperature of 750°C for 23h; then, raise the temperature to 1000°C, evacuate and maintain for 1 hour, the quaternary ammonium salt decomposes to produce N2, which enters the lattice of the metallic aluminum powder to form aluminum nitride powder with a powder particle size of 400nm.

[0067] 2. Preparation of Polygonum cuspidatum extract (same as Example 1)

[0068] The dried roots and stems of Polygonum cuspidatum are crushed and ground, passed through an 80-mesh sieve, and then immersed in a 75% ethanol solution. After extraction at 25°C for 48 hours, the solution is filtered, and the filtrate is concentrated into an extract, spray-dried, and then air-flow-milled to obtain a Polygonum cuspidatum extract powder with a particle size of ≤2 microns for later use.

[0069] 3. Preparation of composite functional cellulose aerogel

[0070] First, weigh 50g of cotton fiber and place it in a 50℃ oven for drying for 12h, and then seal it. Prepare a NaOH / urea aqueous solution (containing 7wt% NaOH, 12wt% urea) and pre-cool it at -12℃ for standby use. Then, add the dried cotton fiber to the NaOH / urea aqueous solution, the mass ratio of cotton fiber to NaOH / urea aqueous solution is 1:10, stir it at 500rpm magnetically for 30min at room temperature and place it at -18℃ for 6h, dissolve the frozen material to obtain a cellulose suspension; centrifuge the cellulose suspension and wash it with water until neutral to obtain a cellulose aqueous suspension. Then, add 6%wt of the aluminum nitride powder prepared in step 1 and 3%wt of the knotweed extract prepared in step 2 to the cellulose aqueous suspension, treat it in an ultrasonic oscillator with a power of 1200w and an oscillation frequency of 28kHz for 45min, and finally obtain a composite functional cellulose aerogel by freeze drying, that is, a cellulose aerogel loaded with aluminum nitride and knotweed extract.

[0071] 4. Preparation of functional polyester masterbatch

[0072] 91.5wt% polyester masterbatch is used as a substrate, 5.0wt% of the composite functional cellulose aerogel prepared in step 3 and additives (including 2.0wt% vinyl bisstearamide, 0.5wt% heat stabilizer (PET heat stabilizer FT-4288), 0.5wt% hydroxylamine antioxidant AO-30, 0.5wt% anti-phenol yellowing agent V-251) are added, mixed and melted, and screw extruded and granulated to prepare a functional polyester masterbatch containing composite functional cellulose aerogel. The masterbatch processing process is as follows:

[0073] PET substrate drying → adding functional components and additives → three-dimensional premixing (5min) → high-speed mixing (10min) → melt extrusion into strips → water bath cooling → pelletizing → sieving → pre-crystallization (240min) → packaging.

[0074] 5. Spinning and post-processing

[0075] Melt spinning is used for spinning. Ordinary polyester masterbatch and functional polyester masterbatch raw materials are mixed in a mass ratio of 1:9. After heating, extrusion and melting, they are sent to a metering pump. The melt flows through a spinning box, where it is filtered and pressed into a porous spinneret to condense and solidify into a tow fiber. After stretching and winding, functional polyester filament (75D / 72F FDY) is obtained.

[0076] Example 2

[0077] This embodiment prepares a functional polyester filament with a specification of 75D / 72F DTY. The specific preparation process is as follows:

[0078] 1. Preparation of aluminum nitride powder

[0079] Put 100g of metallic aluminum powder (purity ≥99%) into a ball mill, add 3g of distearylethylenediamine, then add 150g of chitosan quaternary ammonium salt, mix and grind at a grinding temperature of 750°C for 24h; then, raise the temperature to 1000°C, evacuate and maintain for 1 hour, the quaternary ammonium salt decomposes to produce N2, which enters the lattice of the metallic aluminum powder to form aluminum nitride powder with a powder particle size of 410nm.

[0080] 2. Preparation of Polygonum cuspidatum Extract

[0081] Same as Example 1.

[0082] 3. Preparation of composite functional cellulose aerogel

[0083] First, weigh 50g of ramie fiber and place it in a 50℃ oven for drying for 12h, and then seal it. Prepare a NaOH / urea aqueous solution (containing 7wt% NaOH and 12wt% urea) and pre-cool it at -12℃ for standby use. Then, add the dried ramie fiber to the NaOH / urea aqueous solution, the mass ratio of ramie fiber to NaOH / urea aqueous solution is 1:15, stir it with a magnetic force of 500rpm for 30min at room temperature, and then place it at -18℃ for 6h to dissolve the frozen material to obtain a cellulose suspension; centrifuge the cellulose suspension and wash it with water until it is neutral to obtain a cellulose aqueous suspension. Then, add 7wt% of the aluminum nitride powder prepared in step 1 and 4wt% of the knotweed extract prepared in step 2 to the cellulose aqueous suspension, treat it in an ultrasonic oscillator with a power of 1200w and an oscillation frequency of 28kHz for 45min, and finally obtain a composite functional cellulose aerogel by freeze drying, that is, a cellulose aerogel loaded with aluminum nitride and knotweed extract.

[0084] 4. Preparation of functional polyester masterbatch

[0085] Same as Example 1.

[0086] 5. Spinning and post-processing

[0087] Melt spinning is used for spinning. Ordinary polyester masterbatch and functional polyester masterbatch raw materials are mixed in a mass ratio of 9:1. After heating, extrusion and melting, they are sent to a metering pump. The melt flows through a spinning box, where it is filtered and pressed into a porous spinneret to condense and solidify into a tow fiber. After stretching and winding, functional polyester filament (75D / 72F DTY) is obtained.

[0088] Example 3

[0089] This embodiment prepares a functional polyester filament with a specification of 50D / 48F DTY. The specific preparation process is as follows:

[0090] 1. Preparation of aluminum nitride powder

[0091] Put 100g of metallic aluminum powder (purity ≥99%) into a ball mill, add 3g of distearylethylenediamine, then add 200g of chitosan quaternary ammonium salt, mix and grind at a grinding temperature of 750°C for 25h; then, raise the temperature to 1000°C, evacuate and maintain for 1 hour, the quaternary ammonium salt decomposes to produce N2, which enters the lattice of the metallic aluminum powder to form aluminum nitride powder with a powder particle size of 420nm.

[0092] 2. Preparation of Polygonum cuspidatum Extract

[0093] Same as Example 1.

[0094] 3. Preparation of composite functional cellulose aerogel

[0095] First, weigh 50g of bamboo fiber and place it in a 50℃ oven for drying for 12h, and then seal it. Prepare a NaOH / urea aqueous solution (containing 7wt% NaOH and 12wt% urea) and pre-cool it at -12℃ for standby use. Then, add the dried bamboo fiber to the NaOH / urea aqueous solution, the mass ratio of bamboo fiber to the NaOH / urea aqueous solution is 1:20, stir it with a magnetic force of 500rpm for 30min at room temperature, and then place it at -18℃ for 6h to dissolve the frozen material to obtain a cellulose suspension; centrifuge the cellulose suspension and wash it with water until it is neutral to obtain a cellulose aqueous suspension. Then, add 8wt% of the aluminum nitride powder prepared in step 1 and 5wt% of the knotweed extract prepared in step 2 to the cellulose aqueous suspension, treat it in an ultrasonic oscillator with a power of 1200w and an oscillation frequency of 28kHz for 45min, and finally obtain a composite functional cellulose aerogel by freeze drying, that is, a cellulose aerogel loaded with aluminum nitride and knotweed extract.

[0096] 4. Preparation of functional polyester masterbatch

[0097] Same as Example 1.

[0098] 5. Spinning and post-processing

[0099] Melt spinning is used for spinning. Ordinary polyester masterbatch and functional polyester masterbatch raw materials are mixed in a mass ratio of 19:1. After heating, extrusion and melting, they are sent to a metering pump. The melt flows through a spinning box, where the melt is filtered and pressed into a porous spinneret to condense and solidify into a tow fiber. After stretching and winding, functional polyester filament (50D / 48F FDY) is obtained.

[0100] The physical properties of the functional polyester filaments prepared in Examples 1 to 3 were tested according to GB / T 14344-2022 "Test Method for Tensile Properties of Chemical Fiber Filaments"; at the same time, the functional polyester filaments prepared in Examples 1 to 3 were used to make knitted fabrics, and the antibacterial properties were tested according to GB / T 20944.3-2008 "Evaluation of Antibacterial Properties of Textiles Part 3: Oscillation Method", and the instantaneous cool feeling performance was tested according to GB / T 35263-2017 "Testing and Evaluation of Instantaneous Cool Feeling Performance of Textiles". The test results are shown in Tables 1, 2 and 3 below.

[0101] Table 1 Physical properties of functional polyester filaments of Examples 1 to 3

[0102]

[0103] Table 2 Evaluation results of antibacterial properties of knitted fabrics made of functional polyester filaments of Examples 1 to 3

[0104]

[0105] Table 3 Evaluation results of instantaneous cool feeling performance of knitted fabrics made of functional polyester filaments of Examples 1 to 3

[0106] Test items <![CDATA[q max / [J / (cm 2 ·S)]]]> evaluate National Standards ≥0.15 It has instant cool feeling when touching Example 1 0.21 It has instant cool feeling when touching Example 2 0.19 It has instant cool feeling when touching Example 3 0.18 It has instant cool feeling when touching

[0107] As can be seen from the above table, after testing, the physical indicators of the functional polyester filaments of Examples 1 to 3 can meet the requirements of the first-class products of GB / T14464-2017 "Polyester Staple Fiber", and the fiber has excellent wearing performance and good textile processing performance; at the same time, the knitted fabric made of the functional polyester filaments of Examples 1 to 3 has an inhibition rate of up to 98.2% on Staphylococcus aureus, up to 98.6% on Escherichia coli, and up to 89.5% on Candida albicans, and has good antibacterial effect; it also has instant cool feeling performance upon contact. It shows that the functional polyester fiber of the present invention has good antibacterial and cool feeling properties.

[0108] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed by the present invention shall still be covered by the claims of the present invention.

Claims

1. An antibacterial cool feeling polyester fiber containing plant extracts, characterized in that: The invention comprises polyester and composite functional cellulose aerogel. The composite functional cellulose aerogel comprises cellulose aerogel and aluminum nitride and plant extract loaded on the cellulose aerogel. The plant extract comprises a knotweed extract.

2. The antibacterial cool feeling polyester fiber containing plant extracts according to claim 1, characterized in that: In the antibacterial cooling polyester fiber made from plant extracts, the mass ratio of polyester to composite functional cellulose aerogel is 0.1-0.8:8-20.

3. The antibacterial cool feeling polyester fiber containing plant extracts according to claim 1, characterized in that: The composite functional cellulose aerogel is made of aluminum nitride, plant extract and cellulose hydrogel in a mass ratio of 1 to 10:1 to 20:100; And / or, the particle size of the composite functional cellulose aerogel is less than or equal to 1 micron.

4. A method for preparing an antibacterial cool polyester fiber containing plant extracts, characterized in that: The steps include: Aluminum nitride, plant extract and cellulose hydrogel are mixed to prepare cellulose aerogel loaded with aluminum nitride and plant extract; the plant extract includes Polygonum cuspidatum extract; The cellulose aerogel loaded with aluminum nitride and plant extract is mixed with polyester to prepare a functional polyester masterbatch; The functional polyester masterbatch is blended with polyester and spun to obtain the antibacterial cool polyester fiber containing plant extracts.

5. The preparation method according to claim 4, characterized in that: The mass ratio of the aluminum nitride, the plant extract and the cellulose hydrogel is 1-10:1-20:100; And / or, the particle size of the cellulose aerogel loaded with aluminum nitride and plant extract is less than or equal to 1 micron.

6. The preparation method according to claim 4 or 5, characterized in that: The aluminum nitride is selected from aluminum nitride nanopowder, and the particle size is 300nm to 500nm; And / or, the solid content of the knotweed extract is 5wt% to 10wt%; And / or, the Polygonum cuspidatum extract is an alcohol extract of Polygonum cuspidatum; And / or, the cellulose hydrogel contains 4wt% to 10wt% of cellulose fibers.

7. The preparation method according to claim 4, characterized in that: The mass ratio of the cellulose aerogel loaded with aluminum nitride and plant extract to the polyester is 1-8:85-95; And / or, the cellulose aerogel loaded with aluminum nitride and plant extracts is mixed with polyester and additives to prepare functional polyester masterbatch, wherein the additives include dispersants, heat stabilizers, antioxidants and / or anti-phenol yellowing agents.

8. The preparation method according to claim 4, characterized in that: The mass ratio of the functional polyester masterbatch to the polyester is 1:8-20.

9. The preparation method according to claim 4, characterized in that: The spinning temperature is 275℃~280℃.

10. A textile product, characterized in that: The invention comprises the antibacterial cool feeling polyester fiber containing plant extracts according to any one of claims 1 to 3 and / or the antibacterial cool feeling polyester fiber containing plant extracts prepared by the method according to any one of claims 4 to 9.

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