CN112410918A - Polyamide fiber containing porous molecular nest and preparation method thereof - Google Patents
Polyamide fiber containing porous molecular nest and preparation method thereof Download PDFInfo
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- CN112410918A CN112410918A CN202011299861.6A CN202011299861A CN112410918A CN 112410918 A CN112410918 A CN 112410918A CN 202011299861 A CN202011299861 A CN 202011299861A CN 112410918 A CN112410918 A CN 112410918A
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F6/00—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof
- D01F6/88—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from mixtures of polycondensation products as major constituent with other polymers or low-molecular-weight compounds
- D01F6/90—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from mixtures of polycondensation products as major constituent with other polymers or low-molecular-weight compounds of polyamides
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F1/00—General methods for the manufacture of artificial filaments or the like
- D01F1/02—Addition of substances to the spinning solution or to the melt
- D01F1/10—Other agents for modifying properties
- D01F1/103—Agents inhibiting growth of microorganisms
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F8/00—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof
- D01F8/04—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers
- D01F8/12—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers with at least one polyamide as constituent
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Abstract
The invention provides a preparation method of polyamide fiber containing porous molecular nests, which comprises the following steps: s1, preparing a plant functional slow-release porous molecular nest; s2, preparing functional master batches; s3, preparing the polyamide fiber containing the porous molecular nest. The fiber prepared by the invention has good functions of antibiosis, bacteriostasis, aromaticity, anti-allergy or anti-inflammatory and the like, and the porous material containing the plant extract is uniformly dispersed in the slices, so that the prepared master batch is further prepared into the fiber with good functions, the preparation process is simple, the traditional melt spinning equipment can be directly utilized, the existing equipment is not required to be modified, the industrialization is easy, and the practicability is very strong.
Description
Technical Field
The invention relates to the technical field of spinning, in particular to a polyamide fiber containing porous molecular nests and a preparation method thereof.
Background
Polyamide (PA) fiber is synthetic fiber which realizes industrial production at the earliest in the world and is one of main varieties of chemical fiber, and the polyamide fiber has the advantages of low water absorption, good low temperature resistance, stable size, high strength, good toughness, wear resistance, shock absorption and the like, and is widely applied to the fields of aviation, textile, electrical appliances, sports and the like. Since polyamide fibers have excellent physical and textile properties, they have been developed rapidly and their yields have been the top of synthetic fibers for a long time. There are many varieties of polyamide fibers, and at present, polyamide 66 and polyamide 6 are mainly produced in the most industrialized mode and applied in the most extensive mode, and the yield of the polyamide fibers and the polyamide fibers accounts for about 98 percent of that of the polyamide fibers. Polyamide 66 represents approximately 69% of the total yield of polyamide fibres. The yield of polyamide 66 in China is about 60 percent, and the yield of polyamide 6 is about 40 percent. For historical reasons and different specific conditions in different countries, the western european countries such as the united states and the united kingdom and france have been dominated by the production of polyamide 66, while japan, italy, former soviet union and eastern european countries have been dominated by the production of polyamide 6, and some developing countries have also developed polyamide 6 fibers in large numbers. The production of polyamide fibres is predominantly continuous, but the production of staple fibres is gradually increasing. Therefore, it is important to develop a novel polyamide fiber.
Melt spinning, also known as melt spinning, is a molding method that takes a polymer melt as a raw material and is carried out by a melt spinning machine. Any polymer that can be melted or converted to a viscous state by heating without significant degradation can be spun by melt spinning. During melt spinning, the bulk polymer is melted in a screw extruder and then is fed into a spinning part, and is quantitatively fed into a spinning assembly through a spinning pump, and after filtration, the bulk polymer is extruded from capillary holes of a spinneret plate. The liquid strand is gradually solidified when passing through a cooling medium, and then is drawn into a filament at a high speed by a winding device below, the filament is a nascent fiber, and the nascent fiber is post-processed into a fiber. In order to prevent the filaments from being cooled too fast and difficult to form filaments, isothermal melt spinning is sometimes adopted, i.e. an isothermal chamber (called a spinning channel) is additionally arranged on a spinneret plate. The drawing speed of the winding device is very high, and can reach 1500-3000 m/min, depending on the material type and rheological property. The melt spinning has a large draw ratio and high productivity, and can be adjusted in a wide range. The nylon (polyester fiber), nylon (nylon) and polypropylene fiber (such as polypropylene fiber) are all formed by melt spinning. An important requirement for melt spun polymers is a low melting point and no degradation upon softening by heat. The melt spinning does not need solvent, so the process is simple, the cost is low, and the problem of solvent recovery is avoided.
The prior melt spinning nylon fiber does not have certain functionality, such as anti-allergy, anti-inflammation, antibiosis and bacteriostasis, and the like, and the fluidity and the mechanical property of the spinning master batch are not good.
Disclosure of Invention
The invention aims to provide polyamide fiber containing porous molecular nests and a preparation method thereof, which can improve the fluidity and mechanical property of master batches, improve the spinnability and drawability of the master batches, and prepare the high-strength high-modulus polyamide fiber, and the prepared polyamide fiber has good functions of antibiosis, bacteriostasis, aromaticity, anti-sensitivity or anti-inflammation and the like, so that porous materials containing plant extracts are uniformly dispersed in slices, and the prepared master batches are further prepared into the polyamide fiber with good functions.
The technical scheme of the invention is realized as follows:
the technical scheme of the invention is realized as follows:
the invention provides a preparation method of polyamide fiber containing porous molecular nests, wherein the polyamide fiber contains 1-4 wt% of porous molecular nests containing plant extracts.
As a further improvement of the invention, the method comprises the following steps:
s1, preparing a porous molecular nest containing plant extracts;
s2, preparing a composite modifier;
s3, preparing a porous molecular nest-containing chinlon master batch;
s4, preparing the polyamide fiber containing the porous molecular nest.
As a further improvement of the present invention, step S1 includes:
s101, dissolving a plant extract: selecting plant extract, heating water, adding plant extract, stirring to dissolve completely to obtain saturated water solution of plant extract;
s102, preparation of a porous molecular nest containing plant extracts: carrying out primary shearing on a saturated aqueous solution of the plant extract, a porous nano material, a coupling agent and a surfactant, then adding a polyimide acid solution, carrying out secondary shearing, then adding a stabilizing agent, carrying out original shearing dispersion to obtain a stable nano composite suspension dispersion liquid containing the plant extract, and volatilizing a solvent to obtain a dry porous molecular nest containing the plant extract.
As a further improvement of the invention, the shearing force of the first shearing is 5250-6000ips, the shearing time is 4-9min, the temperature rising rate is 3 ℃/min, the shearing force of the second shearing is 2500-3000ips, and the shearing time is 5-10 min.
As a further improvement of the invention, the coupling agent is a mixture of a silane coupling agent KH550 and a silane coupling agent KH570, the mass ratio is 5 (1-3), the surfactant is a mixture of Tween-80 and span-80, the mass ratio is 10 (1-3), and the stabilizer is a mixture of magnesium stearate and aluminum stearate, and the mass ratio is 1 (2-4).
As a further improvement of the invention, the preparation steps of the composite modifier are as follows: and adding the dried porous molecular nest containing the plant extract into a grinding machine, adding a fat-soluble solvent, a dispersing agent and a stabilizing agent, grinding, and dispersing the agglomerated porous nano microspheres to obtain the modified composite modifying agent containing the plant extract.
As a further improvement of the invention, the preparation steps of the porous molecular nidogen-containing polyamide master batch are as follows: adding a composite modifier containing plant extracts into the chinlon chips, and melting at high temperature to sufficiently remove the stabilizer to obtain the chinlon master batch containing the porous molecules.
As a further improvement of the invention, the preparation steps of the polyamide fiber containing porous molecular nests are as follows: mixing the porous molecular nest containing the plant extract with the core layer resin, the antioxidant and the auxiliary agent to obtain a core layer mixture; mixing the porous molecular nest containing the plant extract with shell resin, an antioxidant and an auxiliary agent to obtain a shell mixture; and extruding, spinning, air cooling, stretching, dipping, secondarily stretching, drying and cutting the core layer mixture and the shell layer mixture to obtain the polyamide fiber containing the porous molecular nest.
As a further improvement of the invention, the antioxidant is selected from diphenylamine, p-phenylenediamine, dihydroquinoline, 2, 6-tertiary butyl-4-methylphenol, bis (3, 5-tertiary butyl-4-hydroxyphenyl) thioether, tetra [ beta- (3, 5-tertiary butyl-4-hydroxyphenyl) propionic acid ] pentaerythritol ester, trioctyl ester, tridecyl ester, tridodecyl alcohol ester and trihexadecyl alcohol ester, the auxiliary agent is a mixture of styrene-butadiene thermoplastic elastomer, di (2-ethylhexyl) phthalate and microcrystalline cellulose, and the mass ratio is 1: (3-5): (0.5-1).
The invention further protects the polyamide fiber containing the porous molecular nest prepared by the preparation method.
The invention has the following beneficial effects: (1) according to the invention, the composite modifier containing the plant extract is added into the nylon chips, so that the fluidity and the mechanical property of the master batch can be improved, the spinnability and the drawability of the master batch are improved, the high-strength high-modulus nylon fiber is prepared, and the prepared fiber has good functions of antibiosis, bacteriostasis, aromaticity, allergy resistance or inflammation elimination and the like, so that the porous material containing the plant extract is uniformly dispersed in the chips, and the prepared master batch is further prepared into the fiber with good function; (2) the preparation process is simple, can directly utilize the traditional melt spinning equipment, does not need to modify the existing equipment, is easy to industrialize and has strong practicability.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
EXAMPLE 1 preparation of Polyamide fiber containing porous molecular nest
S1, preparation of a porous molecular nest containing plant extracts:
step one, preparing a saturated aqueous solution of an eucommia ulmoides leaf extract; selecting a eucommia ulmoides leaf extract, adding a proper amount of water into a beaker, heating the mixture to 70 ℃ in a water bath, then adding the eucommia ulmoides leaf extract, and stirring the mixture until the mixture is completely dissolved, wherein the bath ratio is 1:10, so as to obtain a saturated aqueous solution of the eucommia ulmoides leaf extract;
the eucommia ulmoides leaf extract is loose in appearance powder, free of agglomeration, brown yellow in color and uniform; the content of active ingredients is more than or equal to 98 percent, the water content is less than or equal to 5 percent, the total number of colonies is less than 99cfu/g, and salmonella and escherichia coli can not be detected.
Step two, preparing functional porous molecular nests of the eucommia ulmoides leaves; sequentially adding a saturated aqueous solution of an eucommia ulmoides leaf extract, aerogel, a coupling agent and a surfactant into a high-speed shearing disperser, wherein the shearing force is 5250ips, the shearing time is 4min, heating to 50 ℃ at a speed of 3 ℃/min, preserving heat, then adding a polyimide acid solution accounting for 15% of the total mass of the above substances, performing secondary shearing, wherein the shearing force is 2500ips, the shearing time is 5min, adding a stabilizer accounting for 0.1 wt% of the total mass of the above substances, performing shearing dispersion to obtain a stable nano composite suspension dispersion liquid containing the eucommia ulmoides leaf extract, and performing solvent volatilization on the prepared dispersion liquid to obtain a dry composite nano material; in order to make the eucommia ulmoides leaf extract enter the porous material as much as possible, the experiment process can be repeatedly carried out for many times;
the coupling agent is a mixture of a silane coupling agent KH550 and a silane coupling agent KH570, and the mass ratio is 5: 1;
the surfactant is a mixture of tween-80 and span 80, and the mass ratio is 10: 1;
the stabilizer is a mixture of magnesium stearate and aluminum stearate in a mass ratio of 1: 2;
s2, preparing a composite modifier: adding dried porous molecular nest containing plant extract into a grinder, adding fat-soluble solvent, dispersant and stabilizer, grinding, and dispersing the agglomerated porous nano-microspheres to obtain modified composite modifier containing plant extract
The fat-soluble solvent is a mixed solvent of benzene, diethyl ether and petroleum ether, and the volume ratio is 3:2: 1;
the dispersant is sodium polyacrylate;
the stabilizer is magnesium stearate;
s3, preparing functional master batches; adding a composite modifier into the nylon chips, melting at high temperature, and keeping the melting for 10min so as to fully remove the stabilizer and obtain functional master batches;
s4, preparing the polyamide fiber containing the porous molecular nest, namely spinning the prepared functional master batch in a melt spinning machine, and preparing the polyamide fiber into nascent fiber through a screw extruder, a melt filter, a spinning box and a component; and (3) performing secondary hot drawing and heat setting on the prepared nascent fiber to obtain the high-strength high-modulus polyamide fiber containing the porous molecular nest.
Example 2 preparation method of Chinlon fiber containing porous molecular nest
S1, preparation of porous molecular nest containing plant extracts
The method comprises the following steps: preparing a saturated aqueous solution of the gallnut extract; selecting a Chinese gall extract, adding a proper amount of water into a beaker, heating to 90 ℃ in a water bath, adding the Chinese gall extract, stirring until the Chinese gall extract is completely dissolved, wherein the bath ratio is 1:15, and obtaining a saturated aqueous solution of the Chinese gall extract;
the gallnut extract is loose in appearance powder, free of agglomeration, brown yellow in color and uniform; the content of active ingredients is more than or equal to 98 percent, the water content is less than or equal to 5 percent, the total number of colonies is less than 99cfu/g, and salmonella and escherichia coli can not be detected.
Step two: preparing a gallnut functional porous molecular nest; mixing saturated aqueous solution of Galla chinensis extract and nanometer TiO2Sequentially adding the microspheres, the coupling agent and the surfactant into a high-speed shearing disperser, wherein the shearing force is 6000ips, the shearing time is 9min, heating to 50 ℃ at the speed of 3 ℃/min, preserving heat, then adding a polyimide acid solution accounting for 20% of the total mass of the substances, performing secondary shearing, wherein the shearing force is 3000ips, the shearing time is 10min, adding a stabilizer accounting for 5 wt% of the total mass of the substances, performing shearing dispersion to obtain a stable nano composite suspension dispersion liquid containing the Chinese gall extract, and performing solvent volatilization on the prepared dispersion liquid to obtain a dry composite nano material; in order to make the gallnut extract enter the porous material as much as possible, the experiment process can be repeatedly carried out for many times;
the coupling agent is a mixture of a silane coupling agent KH550 and a silane coupling agent KH570, and the mass ratio is 5: 3;
the surfactant is a mixture of tween-80 and span 80, and the mass ratio is 10: 3;
the stabilizer is a mixture of magnesium stearate and aluminum stearate in a mass ratio of 1: 4;
s2, preparing a composite modifier: adding the dried composite nano material into a grinding machine, adding a fat-soluble solvent, a dispersing agent and a stabilizing agent for grinding, and dispersing the agglomerated porous nano material to obtain a composite modifying agent;
the fat-soluble solvent is a mixed solvent of benzene, diethyl ether and petroleum ether, and the volume ratio is 3:2: 1;
the dispersant is ammonium polyacrylate;
the stabilizer is hindered phenol;
s3, preparing functional master batches; adding a composite modifier into the nylon chips, melting at high temperature, and keeping the melting for 15min so as to fully remove the stabilizer and obtain functional master batches;
s4, preparing the polyamide fiber containing the porous molecular nest, namely spinning the prepared functional master batch in a melt spinning machine, and preparing the polyamide fiber into nascent fiber through a screw extruder, a melt filter, a spinning box and a component; and (3) performing secondary hot drawing and heat setting on the prepared nascent fiber to obtain the high-strength high-modulus polyamide fiber containing the porous molecular nest.
Example 3 preparation method of Chinlon fiber containing porous molecular nest
S1, preparation of porous molecular nest containing plant extracts
Step one, preparing a saturated aqueous solution of a mint extract; selecting a mint extract, adding a proper amount of water into a beaker, heating to 80 ℃ in a water bath, then adding the mint extract, stirring until the mint extract is completely dissolved, wherein the bath ratio is 1:12, so as to obtain a saturated aqueous solution of the mint extract;
the mint extract has loose powder appearance, no agglomeration, brown yellow color and uniform color; the content of active ingredients is more than or equal to 98 percent, the water content is less than or equal to 5 percent, the total number of colonies is less than 99cfu/g, and salmonella and escherichia coli can not be detected.
Step two, preparing a mint functional slow-release porous molecular nest; mixing saturated water solution of herba Menthae extract and nanometer SiO2Sequentially adding the microspheres, the coupling agent and the surfactant into a high-speed shearing disperser with the shearing force of 5700ips and the shearing time of 4-9min, heating to 50 ℃ at the speed of 3 ℃/min, preserving heat, adding a polyimide acid solution with the total mass of 17 percent of the above substances, shearing for the second time, and then adding the polymer particlesAdding a stabilizer accounting for 2.5 wt% of the total mass of the materials into the solution with the shearing force of 2700ips and the shearing time of 7min, shearing and dispersing to obtain a stable nano composite suspension dispersion liquid containing the plant extract, and volatilizing the solvent of the prepared dispersion liquid to obtain a dry composite nano material; in order to make the mint extract enter the porous material as much as possible, the experiment process can be repeated for a plurality of times;
the coupling agent is a mixture of a silane coupling agent KH550 and a silane coupling agent KH570, and the mass ratio is 5: 2;
the surfactant is a mixture of tween-80 and span 80, and the mass ratio is 10: 2;
the stabilizer is a mixture of magnesium stearate and aluminum stearate in a mass ratio of 1: 3;
s2, preparing a composite modifier: adding the dried composite nano material into a grinding machine, adding a fat-soluble solvent, a dispersing agent and a stabilizing agent for grinding, and dispersing the agglomerated porous nano material to obtain a composite modifying agent;
the fat-soluble solvent is a mixed solvent of benzene, diethyl ether and petroleum ether, and the volume ratio is 3:2: 1;
the dispersant is potassium polyacrylate;
the stabilizer is zinc stearate;
s3, preparing functional master batches; adding a composite modifier into the nylon chips, melting at high temperature, and keeping the melting for 12min so as to fully remove the stabilizer and obtain functional master batches;
s4, preparing the polyamide fiber containing the porous molecular nest, namely spinning the prepared functional master batch in a melt spinning machine, and preparing the polyamide fiber into nascent fiber through a screw extruder, a melt filter, a spinning box and a component; and (3) performing secondary hot drawing and heat setting on the prepared nascent fiber to obtain the high-strength high-modulus polyamide fiber containing the porous molecular nest.
Comparative example 1
Compared with example 3, the coupling agent is a silane coupling agent KH550, and other conditions are not changed.
Comparative example 2
Compared with example 3, the coupling agent is a silane coupling agent KH570, and other conditions are not changed.
Test example 1
The master batch prepared by the embodiment of the invention is subjected to performance test, and the result is shown in table 1.
The melt flow rate is detected according to the GB/T3682 method;
the density is detected according to a GB/T1033 method;
the tensile strength is detected according to the GB/T1040 method;
TABLE 1
| Group of | Melt flow Rate (g/10min) | Density (g/cm)3) | Tensile Strength (MPa) |
| Example 1 | 25.7 | 0.923 | 39.5 |
| Example 2 | 26.5 | 0.902 | 40.2 |
| Example 3 | 28.4 | 0.914 | 42.1 |
| Comparative example 1 | 15.2 | 0.832 | 25.2 |
| Comparative example 2 | 17.8 | 1.024 | 22.4 |
Test example 2
Preparing an escherichia coli liquid coated plate with 16700 viable bacteria/mu L, taking 10 mu L of escherichia coli liquid, wherein the OD value is 0.320, diluting the escherichia coli liquid with 16700 viable bacteria/mu L to 1000 mu L, taking 100 mu L of coated plate (the diameter is 85mm), processing the polyamide fiber prepared by the steps through a hot air or hot rolling non-woven fabric production line to obtain high-permeability, high-adsorption and low-density non-woven fabric, cutting the prepared non-woven fabric into round pieces with the diameter of 10mm, culturing for 36 hours at proper temperature after the membrane is attached to the plate, and measuring the size of a bacteriostatic ring.
The results are shown in Table 2.
TABLE 2
| Group of | Diameter of bacteriostatic circle (mm) |
| Example 1 | 35.2 |
| Example 2 | 34.3 |
| Example 3 | 36.5 |
| Comparative example 1 | 20.1 |
| Comparative example 2 | 18.2 |
Test example 3
The mechanical properties of the nylon fibers prepared in the examples and the comparative examples were measured, and the results are shown in Table 3.
TABLE 3
Test example 4
The mechanical properties of the nylon fibers obtained above were tested, the fibers were fixed at a distance of 25cm, and the fiber strength (g/den) and the fiber elongation (%) were measured using a fiber yarn tensile tester (equipment model STATIMATC, manufactured by TEXTECHNO corporation) at a tensile speed of 125 cm/minute and a tensile strength of 100 newtons (N), at a relative humidity of 65% and at a temperature of 23 ℃. The results are shown in Table 2.
TABLE 4
| Group of | Fiber Strength (g/den) | Fiber elongation (%) |
| Example 1 | 0.95 | 45.4 |
| Example 2 | 0.92 | 45.2 |
| Example 3 | 0.97 | 45.9 |
| Comparative example 1 | 0.71 | 37.1 |
| Comparative example 2 | 0.75 | 35.5 |
As can be seen from the data in the above table, the method of the invention improves the spinnability and drawability of the nylon by adding the composite modifier containing the plant extract into the nylon chips, and prepares the high-strength high-modulus nylon fiber.
Compared with the prior art, (1) the composite modifier containing the plant extract is added into the nylon chips, so that the fluidity and the mechanical property of the master batch can be improved, the spinnability and the drawability of the master batch are improved, the high-strength high-modulus nylon fiber is prepared, and the prepared fiber has good functions of antibiosis, bacteriostasis, aromaticity, anti-allergy or anti-inflammation and the like, so that the porous material containing the plant extract is uniformly dispersed in the chips, and the prepared master batch is further prepared into the fiber with good function; (2) the preparation process is simple, can directly utilize the traditional melt spinning equipment, does not need to modify the existing equipment, is easy to industrialize and has strong practicability.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (10)
1. A preparation method of polyamide fiber containing porous molecular nests is characterized in that the polyamide fiber contains 1-4 wt% of porous molecular nests containing plant extracts.
2. The preparation method of the polyamide fiber containing the porous molecular nest according to claim 1, characterized by comprising the following steps:
s1, preparing a porous molecular nest containing plant extracts;
s2, preparing a composite modifier;
s3, preparing a porous molecular nest-containing chinlon master batch;
s4, preparing the polyamide fiber containing the porous molecular nest.
3. The method for preparing polyamide fiber containing porous molecular nest according to claim 1, wherein step S1 includes:
s101, dissolving a plant extract: selecting plant extract, heating water, adding plant extract, stirring to dissolve completely to obtain saturated water solution of plant extract;
s102, preparation of a porous molecular nest containing plant extracts: carrying out primary shearing on a saturated aqueous solution of the plant extract, a porous nano material, a coupling agent and a surfactant, then adding a polyimide acid solution, carrying out secondary shearing, then adding a stabilizing agent, carrying out original shearing dispersion to obtain a stable nano composite suspension dispersion liquid containing the plant extract, and volatilizing a solvent to obtain a dry porous molecular nest containing the plant extract.
4. The method for preparing a polyamide fiber containing a porous molecular nest as claimed in claim 2, wherein the shearing force of the first shearing is 5250-6000ips, the shearing time is 4-9min, the temperature rise rate is 3 ℃/min, the shearing force of the second shearing is 2500-3000ips, and the shearing time is 5-10 min.
5. The preparation method of the polyamide fiber containing the porous molecular nest according to claim 3, wherein the coupling agent is a mixture of a silane coupling agent KH550 and a silane coupling agent KH570, the mass ratio is 5 (1-3), the surfactant is a mixture of Tween-80 and span-80, the mass ratio is 10 (1-3), and the stabilizer is a mixture of magnesium stearate and aluminum stearate, and the mass ratio is 1 (2-4).
6. The preparation method of polyamide fiber containing porous molecular nest according to claim 2, characterized in that the preparation steps of the composite modifier are as follows: and adding the dried porous molecular nest containing the plant extract into a grinding machine, adding a fat-soluble solvent, a dispersing agent and a stabilizing agent, grinding, and dispersing the agglomerated porous nano microspheres to obtain the modified composite modifying agent containing the plant extract.
7. The preparation method of polyamide fiber containing porous molecular nest according to claim 2, characterized in that the preparation steps of the polyamide masterbatch containing porous molecular nest are as follows: adding a composite modifier containing plant extracts into the chinlon chips, and melting at high temperature to sufficiently remove the stabilizer to obtain the chinlon master batch containing the porous molecules.
8. The preparation method of the polyamide fiber containing the porous molecular nest according to claim 1, wherein the preparation steps of the polyamide fiber containing the porous molecular nest are as follows: mixing the porous molecular nest containing the plant extract with the core layer resin, the antioxidant and the auxiliary agent to obtain a core layer mixture; mixing the porous molecular nest containing the plant extract with shell resin, an antioxidant and an auxiliary agent to obtain a shell mixture; and extruding, spinning, air cooling, stretching, dipping, secondarily stretching, drying and cutting the core layer mixture and the shell layer mixture to obtain the polyamide fiber containing the porous molecular nest.
9. The method for preparing polyamide fiber containing porous molecular nest according to claim 6, characterized in that the antioxidant is selected from one or more of diphenylamine, p-phenylenediamine, dihydroquinoline, 2, 6-tertiary butyl-4-methylphenol, bis (3, 5-tertiary butyl-4-hydroxyphenyl) sulfide, pentaerythritol tetrakis [ beta- (3, 5-tertiary butyl-4-hydroxyphenyl) propionate ], trioctyl ester, tridecyl ester and trihexadecyl ester, the auxiliary agent is a mixture of styrene-butadiene thermoplastic elastomer, di (2-ethylhexyl) phthalate and microcrystalline cellulose, and the mass ratio is 1: (3-5): (0.5-1).
10. The polyamide fiber containing porous molecular nest prepared by the preparation method according to any one of claims 1 to 9.
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| CN113174648A (en) * | 2021-04-29 | 2021-07-27 | 百事基材料（青岛）股份有限公司 | Chinlon macrobio-fiber containing cocoa active ingredients and preparation method thereof |
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| CN113174648A (en) * | 2021-04-29 | 2021-07-27 | 百事基材料（青岛）股份有限公司 | Chinlon macrobio-fiber containing cocoa active ingredients and preparation method thereof |
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Application publication date: 20210226 |