CN116837475A - Preparation method of antibacterial lyocell fiber - Google Patents
Preparation method of antibacterial lyocell fiber Download PDFInfo
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- CN116837475A CN116837475A CN202310940428.3A CN202310940428A CN116837475A CN 116837475 A CN116837475 A CN 116837475A CN 202310940428 A CN202310940428 A CN 202310940428A CN 116837475 A CN116837475 A CN 116837475A
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- cellulose
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- quaternary ammonium
- ammonium salt
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- 230000000844 anti-bacterial effect Effects 0.000 title claims abstract description 62
- 229920000433 Lyocell Polymers 0.000 title claims abstract description 51
- 238000002360 preparation method Methods 0.000 title claims abstract description 13
- 229920002678 cellulose Polymers 0.000 claims abstract description 89
- 239000001913 cellulose Substances 0.000 claims abstract description 89
- 150000003242 quaternary ammonium salts Chemical class 0.000 claims abstract description 59
- 239000000835 fiber Substances 0.000 claims abstract description 46
- 238000009987 spinning Methods 0.000 claims abstract description 40
- 238000000034 method Methods 0.000 claims abstract description 27
- LFTLOKWAGJYHHR-UHFFFAOYSA-N N-methylmorpholine N-oxide Chemical compound CN1(=O)CCOCC1 LFTLOKWAGJYHHR-UHFFFAOYSA-N 0.000 claims abstract description 25
- 239000002994 raw material Substances 0.000 claims abstract description 18
- 238000004090 dissolution Methods 0.000 claims abstract description 13
- 239000000243 solution Substances 0.000 claims description 34
- 239000007864 aqueous solution Substances 0.000 claims description 15
- 230000001112 coagulating effect Effects 0.000 claims description 7
- 235000021395 porridge Nutrition 0.000 claims description 6
- 229920003171 Poly (ethylene oxide) Polymers 0.000 claims description 4
- 229920003086 cellulose ether Polymers 0.000 claims description 4
- 125000001436 propyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])[H] 0.000 claims description 4
- 238000007664 blowing Methods 0.000 claims description 3
- 238000003756 stirring Methods 0.000 claims description 3
- WAZPLXZGZWWXDQ-UHFFFAOYSA-N 4-methyl-4-oxidomorpholin-4-ium;hydrate Chemical compound O.C[N+]1([O-])CCOCC1 WAZPLXZGZWWXDQ-UHFFFAOYSA-N 0.000 claims description 2
- 238000002156 mixing Methods 0.000 claims description 2
- 239000003242 anti bacterial agent Substances 0.000 abstract description 8
- 229920003043 Cellulose fiber Polymers 0.000 abstract description 7
- 239000002904 solvent Substances 0.000 abstract description 4
- 229920000875 Dissolving pulp Polymers 0.000 abstract description 2
- 230000000052 comparative effect Effects 0.000 description 22
- 238000005406 washing Methods 0.000 description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 8
- 206010061592 cardiac fibrillation Diseases 0.000 description 5
- 230000007423 decrease Effects 0.000 description 5
- 230000002600 fibrillogenic effect Effects 0.000 description 5
- 238000005299 abrasion Methods 0.000 description 4
- 239000000427 antigen Substances 0.000 description 3
- 102000036639 antigens Human genes 0.000 description 3
- 108091007433 antigens Proteins 0.000 description 3
- 239000004599 antimicrobial Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 229920000297 Rayon Polymers 0.000 description 2
- 230000000845 anti-microbial effect Effects 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 238000000354 decomposition reaction Methods 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 239000004816 latex Substances 0.000 description 2
- 229920000126 latex Polymers 0.000 description 2
- 238000011056 performance test Methods 0.000 description 2
- 150000003856 quaternary ammonium compounds Chemical class 0.000 description 2
- 239000004627 regenerated cellulose Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 238000002166 wet spinning Methods 0.000 description 2
- 241000894006 Bacteria Species 0.000 description 1
- 108010073771 Soybean Proteins Proteins 0.000 description 1
- 230000004071 biological effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000007385 chemical modification Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 231100000481 chemical toxicant Toxicity 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 230000015271 coagulation Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 230000003090 exacerbative effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000005923 long-lasting effect Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 239000012460 protein solution Substances 0.000 description 1
- 125000001453 quaternary ammonium group Chemical group 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 235000019710 soybean protein Nutrition 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 230000008961 swelling Effects 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 239000003440 toxic substance Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- 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
- D01F2/00—Monocomponent artificial filaments or the like of cellulose or cellulose derivatives; Manufacture thereof
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Textile Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Agricultural Chemicals And Associated Chemicals (AREA)
- Artificial Filaments (AREA)
Abstract
The application discloses a preparation method of antibacterial lyocell fibers, which belongs to the field of functional cellulose fibers and comprises the following steps of dissolving cellulose quaternary ammonium salt, premixing cellulose pulp raw materials, preparing spinning solution and preparing the lyocell antibacterial fibers, wherein the cellulose quaternary ammonium salt is added into an NMMO solvent to dissolve the cellulose pulp, so that the dissolution of cellulose is not influenced, the uniform and stable spinning solution with good spinnability can be ensured to be obtained, the subsequent spinning process is facilitated, and the antibacterial property of the lyocell fibers can be effectively improved, and the antibacterial property of the lyocell fibers can be reduced to a certain extent; the method of the application is to add the antibacterial agent into the spinning solution, so that the antibacterial agent can be uniformly dispersed in the inside and the surface of the fiber, and long-acting antibacterial can be realized.
Description
Technical Field
The application relates to the technical field of functional cellulose fibers, in particular to a preparation method of antibacterial lyocell fibers.
Background
The lyocell fiber is regenerated cellulose fiber prepared by dissolving cellulose in an aqueous solution of N-methylmorpholine-N-oxide (NMMO) as a solvent and then carrying out a dry-jet wet spinning process. Compared with the traditional cellulose fibers such as viscose, the production process of the lyocell fiber is green and environment-friendly, no toxic chemical reaction occurs, and the fiber has more excellent mechanical properties. In recent years, the worldwide market for lyocell fibers is increasing year by year.
In order to further expand the application field of lyocell fibers in downstream industries, development of differentiated and functionalized lyocell fibers has received a great deal of attention. Since the lyocell fibers are cellulose in the same composition as the common viscose fibers, bacteria are easy to grow, and the application of the lyocell fibers in the field of back-end clothing fabrics is greatly limited. Therefore, imparting excellent antibacterial properties to lyocell fibers is one of the important points of great attention.
At present, two main methods for preparing the antibacterial cellulose regenerated fiber are:
firstly, it is: an antibacterial agent is added into the spinning solution, and antibacterial fibers can be obtained during spinning and forming, for example, modified latex is added into the spinning solution in China patent application CN114134597A to enable the fibers to have natural antibacterial property and high elasticity of the latex, the fibrillation degree of the lyocell fibers can be reduced, for example, in China patent application CN115787120A, a phosphorylated soybean protein solution is added into the lyocell fiber raw material spinning solution, so that the lyocell fibers have better antibacterial property and mechanical property; for example, CN105177746A, nanometer ZnO is used as an antibacterial agent, is mixed with NMMO solution after surface modification, then cellulose pulp is dissolved, and finally antibacterial Lyocell fiber is prepared through spinning; however, the addition of nano ZnO may affect the uniformity of the spinning solution, which may cause the spinning solution to be easily blocked during subsequent filtration, and ZnO may also catalyze the decomposition of cellulose and NMMO, resulting in the risk of explosion and the like.
Secondly, it is: after the fiber is formed, antibacterial post-treatment is carried out, and a layer of antibacterial agent is adsorbed or wrapped on the surface of the fiber, such as Chinese patent application CN114790656A, CN115142260A, CN114150505A and the like. However, the antibacterial effect imparted to the fibers by means of post-treatment is often not maintained for a long period of time (e.g., after washing CN114790656a 20 times and CN115142260a 10 times, the antibacterial performance gradually decreases); also, for example, CN109983172a, spinning a cellulose solution into a regeneration bath through a spinneret to obtain regenerated cellulose fibers, washing the cellulose fibers with water, and then treating the washed cellulose fibers with a quaternary ammonium compound solution to obtain antibacterial lyocell fibers, however, the inventor of the present application found through experiments that the method of the present application is to wrap quaternary ammonium compounds on the surfaces of the fibers, which would result in a decrease in the biocompatibility of the fibers and destroy the original biological properties thereof; in addition, the antibacterial components in the antibacterial lyocell fiber prepared by the method are combined on the surface of the fiber, and are easy to fall off during water washing, so that a long-acting antibacterial effect cannot be realized after multiple water washing, and the production cost and the production period can be greatly increased by a post-treatment process. Therefore, the best way to achieve long-lasting antimicrobial is to add an antimicrobial agent to the spinning dope to produce an antimicrobial fiber.
However, the direct addition of an antimicrobial agent to the dope may affect the dissolution of cellulose in NMMO, thereby affecting the uniformity and spinnability of the dope, making subsequent spinning difficult, and possibly even exacerbating the decomposition of NMMO and cellulose.
Disclosure of Invention
The application aims to provide a preparation method of antibacterial lyocell fibers so as to solve the problems.
In order to achieve the above purpose, the technical scheme adopted by the application is as follows: a method for preparing antibacterial lyocell fiber, comprising the following steps:
(1) Dissolution of cellulose quaternary ammonium salt
Mixing cellulose quaternary ammonium salt with NMMO water solution with the concentration of 70-78 wt%, and stirring for dissolution;
(2) Premixing cellulosic pulp raw materials
Premixing the pretreated cellulose pulp raw material with the NMMO aqueous solution in which the cellulose quaternary ammonium salt is dissolved in the step (1) to obtain premixed pulp porridge;
(3) Preparation of spinning dope
Conveying the premixed pulp porridge in the step (2) to a dissolving device for vacuumizing, dehydrating and dissolving to obtain a solution with the cellulose concentration of 12-13 wt%;
(4) Preparation of lyocell antibacterial fibers
And (3) spinning and forming the spinning solution through a coagulating bath to obtain the lyocell antibacterial fiber.
The cellulose quaternary ammonium salt is added as the cellulose quaternary ammonium salt in the preparation process of the spinning solution, belongs to a natural modified antibacterial agent, and has no influence on the biocompatibility of the fiber after being added; the cellulose quaternary ammonium salt used in the application is a derivative of cellulose after chemical modification, and adopts the prior art to graft the quaternary ammonium group on a cellulose molecular chain, so the cellulose quaternary ammonium salt has the characteristics of natural biocompatibility and the like cellulose, and the cellulose quaternary ammonium salt is introduced into the lyocell fiber, so that the biocompatibility of the fiber and the biological characteristics of the fiber are not influenced.
As a preferable technical scheme:
in the step (1), the cellulose quaternary ammonium salt is chloridized-2-hydroxy-3- (trimethylamino) propyl polyethylene oxide cellulose ether. The synthesis yield of the chloridized-2-hydroxy-3- (trimethylamino) propyl polyethylene oxide cellulose ether is higher, the cost is lower, and the chloridized-2-hydroxy-3- (trimethylamino) propyl polyethylene oxide cellulose ether is also the cellulose quaternary ammonium salt sold in the market at present and is easy to obtain.
As a further preferred technical scheme:
the addition amount of the cellulose quaternary ammonium salt is 0.01-0.2 wt%.
As a preferable technical scheme:
in the step (1), the dissolution temperature is 70-100 ℃.
As a preferable technical scheme:
in the step (2), the addition amount of the cellulose pulp raw material is 10 to 11.5 weight percent of the NMMO aqueous solution in which the cellulose quaternary ammonium salt is dissolved in the step (1).
As a preferable technical scheme:
in the step (2), the premixing temperature is 70-80 ℃.
As a preferable technical scheme:
in the step (4), the coagulating bath is NMMO solution with 15-20wt% and the temperature of the coagulating bath is 20-30deg.C.
As a preferable technical scheme:
in the step (4), the spinning speed is 30-40 m/min.
As a preferable technical scheme:
in the step (4), the air gap of the spinneret is 15-30 mm, the side blowing wind speed is 10-15 m/s, the humidity is 5-20 g/kg (water/air), and the temperature is 15-20 ℃.
Compared with the prior art, the application has the advantages that:
(1) According to the application, the cellulose quaternary ammonium salt is added into the NMMO solvent for dissolution, and then the cellulose pulp is dissolved, so that not only can the dissolution of cellulose be not influenced, but also the uniform and stable spinning solution with good spinnability can be ensured to be obtained, as shown in the following table 2, the better spinnability indicates that the better the quality of the spinning solution is, the more uniform and stable the spinning solution is, and the follow-up spinning process is facilitated;
(2) The method can effectively improve the antibacterial property of the lyocell fiber, can reduce the fibrillation degree of the lyocell fiber to a certain extent, and improves the antigen fibrillation effect of the fiber;
(3) The method of the application is to add the antibacterial agent into the spinning solution, so that the antibacterial agent can be uniformly dispersed in the inside and the surface of the fiber, and long-acting antibacterial can be realized.
Detailed Description
The application will be further illustrated with reference to examples.
Example 1
The embodiment provides a preparation method of antibacterial lyocell fibers, which comprises the following steps:
(1) Dissolution of cellulose quaternary ammonium salt
The cellulose quaternary ammonium salt was mixed with an aqueous NMMO solution having a concentration of 75wt% and dissolved with stirring.
The addition amount of the cellulose quaternary ammonium salt is 0.05 weight percent, and the dissolution temperature is 80 ℃.
(2) Premixing cellulosic pulp raw materials
Premixing the pretreated cellulose pulp raw material with the NMMO aqueous solution in which the cellulose quaternary ammonium salt is dissolved in the step (1) to obtain premixed pulp porridge.
The addition amount of the cellulose pulp raw material is 10.8wt% and the premixing temperature is 80 ℃.
(3) Preparation of spinning dope
And (3) conveying the premixed pulp porridge in the step (2) to a dissolving device for vacuumizing, dehydrating and dissolving to obtain a solution with the cellulose concentration of 12.3 wt%.
(4) Preparation of lyocell antibacterial fibers
Finally forming the spinning solution in a coagulating bath through dry spray wet spinning, and then washing, cutting, oiling and drying to obtain the lyocell antibacterial fiber;
wherein the air gap of the spinneret is 20mm, the side blowing wind speed is 15m/s, the humidity is 15g/kg (water/air), and the temperature is 20 ℃;
the coagulation bath was an 18wt% NMMO solution at a temperature of 22℃and a spinning speed of 34 m/min.
Example 2
On the basis of embodiment 1, this embodiment differs from embodiment 1 in that: the addition amount of the cellulose quaternary ammonium salt is 0.1wt%. Other process conditions and equipment used were the same as in example 1 and will not be described in detail here.
Example 3
On the basis of embodiment 1, this embodiment differs from embodiment 1 in that: the addition amount of the cellulose quaternary ammonium salt is 0.2wt%. Other process conditions and equipment used were the same as in example 1 and will not be described in detail here.
Comparative example 1
On the basis of example 1, this comparative example is different from example 1 in that: the cellulose quaternary ammonium salt is not added into the spinning solution. Other process conditions and equipment used were the same as in example 1 and will not be described in detail here.
Comparative example 2
On the basis of example 1, this comparative example is different from example 1 in that: the cellulose quaternary ammonium salt is not dissolved in an NMMO aqueous solution with the weight percentage of 75 in advance, but is added into the NMMO aqueous solution together with the cellulose pulp raw material for premixing, and the addition amount of the cellulose quaternary ammonium salt and the cellulose pulp raw material is unchanged. Other process conditions and equipment used were the same as in example 1 and will not be described in detail here.
Comparative example 3
On the basis of example 3, this comparative example is different from example 3 in that: the cellulose quaternary ammonium salt is not dissolved in the NMMO aqueous solution of 75 weight percent in advance, but is added into the NMMO aqueous solution together with the cellulose pulp raw material for premixing, and the addition amount of the cellulose quaternary ammonium salt and the cellulose pulp raw material is unchanged. Other process conditions and equipment used were the same as in example 1 and will not be described in detail here.
Comparative example 4
On the basis of comparative example 1, this comparative example is different from comparative example 1 in that: the washed lyocell fiber is treated by 0.05 weight percent of cellulose quaternary ammonium salt aqueous solution, the treatment mode is padding, the padding time is 15min, and the temperature of the cellulose quaternary ammonium salt aqueous solution is 25 ℃. Finally cutting, oiling and drying to obtain the lyocell antibacterial fiber.
The lyocell fibers prepared in the above-described different examples and comparative examples were tested for antibacterial properties and wet abrasion values,
wherein, the antibacterial performance test method refers to FZ/T73023-2006;
the wet abrasion value is measured by adopting a DELTA 100 wet abrasion instrument (the equipment is shown in http:// 16845885. S21d-16.Faius rd.com/61/ABUIABA9GAAgp56Z8gUo-Kne5wY. Pdf);
the results are shown in Table 1.
Table 1 results of the antibacterial properties and wet abrasion values of lyocell fibers of different examples and comparative examples
The lyocell fibers prepared in the above-described different examples and comparative examples were subjected to spinnability evaluation and related mechanical property index test, and the results are shown in table 2.
Table 2 results of the spinnability and finished fiber performance test of lyocell fibers in various examples and comparative examples
The lyocell fibers prepared in the above-described different examples and comparative examples were subjected to water washing 10 times and 20 times, respectively, and then re-dried, and antibacterial properties were tested in the same manner, and the results are shown in table 3.
Table 3 results of antibacterial property test of lyocell fibers of different examples and comparative examples after washing 10 times and 20 times with water
From the above results, the following conclusions can be drawn:
(1) Comparative examples 1 to 3 and comparative example 1 can be seen: (1) the addition of the cellulose quaternary ammonium salt can effectively improve the antibacterial property of the fiber, and the higher the addition amount of the cellulose quaternary ammonium salt is, the better the antibacterial property of the finally obtained fiber is; (2) the addition of the cellulose quaternary ammonium salt can effectively improve the antigen fibrillation effect of the fiber, and the higher the addition amount of the cellulose quaternary ammonium salt is, the better the antigen fibrillation effect of the finally obtained fiber is; (3) the addition of the quaternary ammonium salt of cellulose causes the dry breaking strength, wet breaking strength and dry breaking elongation of the fiber to decrease, and the higher the addition amount of the quaternary ammonium salt of cellulose is, the more the dry breaking strength, wet breaking strength and dry breaking elongation of the fiber decreases. When the addition amount of the cellulose quaternary ammonium salt is 0.2wt%, the dry breaking strength of the lyocell antibacterial fiber is 3.51cN/dtex, the wet breaking strength is 3.04cN/dtex, and the standard of qualified products in Yu Laisai L short fiber industry standard (FZT 52019-2018) is high.
(2) Comparative examples 1, 3 and comparative examples 2, 3 can be seen: compared with the method that the cellulose quaternary ammonium salt and the cellulose pulp raw material are added into the NMMO aqueous solution together to be premixed to prepare the spinning solution, the cellulose quaternary ammonium salt is preferentially dissolved in the NMMO aqueous solution, and then the cellulose pulp raw material is added into the NMMO aqueous solution to be premixed to prepare the spinning solution, so that the quality of the spinning solution is better, the conditions of yarn separation and yarn breakage are not easy to occur in the spinning process, and the spinning solution has better spinnability. The larger the amount of the quaternary ammonium salt of cellulose added, the greater the influence on spinnability. This is because when the cellulose quaternary ammonium salt is added to an aqueous NMMO solution together with a raw material of cellulose pulp, the cellulose quaternary ammonium salt is dissolved first, and the dissolved cellulose quaternary ammonium salt is coated on the surface of the cellulose pulp, thereby preventing penetration of a solvent and affecting swelling and dissolution of the cellulose pulp.
(3) As can be seen from comparative example 1 and comparative example 4: (1) the antibacterial effect of the antibacterial fiber prepared by adding the cellulose quaternary ammonium salt into the spinning solution is better than that of the antibacterial fiber prepared by introducing the cellulose quaternary ammonium salt into the post-treatment process, because the cellulose quaternary ammonium salt is added into the spinning solution, the cellulose quaternary ammonium salt can be uniformly dispersed in the interior and the surface of the formed fiber, the waste of the cellulose quaternary ammonium salt is avoided, the quaternary ammonium salt is introduced into the post-treatment process, the cellulose quaternary ammonium salt can only be dispersed on the surface of the formed fiber, and the cellulose quaternary ammonium salt cannot be fully adsorbed/adhered on the surface of the fiber, so that the utilization rate of the fiber quaternary ammonium salt is low, and the antibacterial effect is reduced; (2) the antibacterial effect of the antibacterial fiber prepared by adding the cellulose quaternary ammonium salt into the spinning solution can be maintained for a long time, the antibacterial fiber still has good antibacterial property after washing for a plurality of times, and the antibacterial property of the antibacterial fiber prepared by introducing the cellulose quaternary ammonium salt through aftertreatment is obviously reduced after washing for a plurality of times, so that the antibacterial fiber cannot be maintained for a long time. This is because the quaternary ammonium salt of cellulose adhered to the surface of the fiber after the post-treatment is continuously dropped off during the water washing process, resulting in a decrease in antibacterial effect.
The foregoing description of the preferred embodiments of the present application is not intended to limit the application, but the present application has been described with reference to the foregoing embodiments, and modifications and equivalents of some of the technical features described in the foregoing embodiments may be made by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.
Claims (9)
1. A method for preparing antibacterial lyocell fiber, which is characterized by comprising the following steps:
(1) Dissolution of cellulose quaternary ammonium salt
Mixing cellulose quaternary ammonium salt with NMMO water solution with the concentration of 70-78 wt%, and stirring for dissolution;
(2) Premixing cellulosic pulp raw materials
Premixing the pretreated cellulose pulp raw material with the NMMO aqueous solution in which the cellulose quaternary ammonium salt is dissolved in the step (1) to obtain premixed pulp porridge;
(3) Preparation of spinning dope
Conveying the premixed pulp porridge in the step (2) to a dissolving device for vacuumizing, dehydrating and dissolving to obtain a solution with the cellulose concentration of 12-13 wt%;
(4) Preparation of lyocell antibacterial fibers
And (3) spinning and forming the spinning solution through a coagulating bath to obtain the lyocell antibacterial fiber.
2. The method for preparing the antibacterial lyocell fiber according to claim 1, wherein:
in the step (1), the cellulose quaternary ammonium salt is chloridized-2-hydroxy-3- (trimethylamino) propyl polyethylene oxide cellulose ether.
3. The method for preparing the antibacterial lyocell fiber according to claim 2, characterized in that: the addition amount of the cellulose quaternary ammonium salt is 0.01-0.2 wt%.
4. The method for preparing the antibacterial lyocell fiber according to claim 1, wherein:
in the step (1), the dissolution temperature is 70-100 ℃.
5. The method for preparing the antibacterial lyocell fiber according to claim 1, wherein:
in the step (2), the addition amount of the cellulose pulp raw material is 10 to 11.5 weight percent of the NMMO aqueous solution in which the cellulose quaternary ammonium salt is dissolved in the step (1).
6. The method for preparing the antibacterial lyocell fiber according to claim 1, wherein:
in the step (2), the premixing temperature is 70-80 ℃.
7. The method for preparing the antibacterial lyocell fiber according to claim 1, wherein:
in the step (4), the coagulating bath is NMMO solution with 15-20wt% and the temperature of the coagulating bath is 20-30deg.C.
8. The method for preparing the antibacterial lyocell fiber according to claim 1, wherein:
in the step (4), the spinning speed is 30-40 m/min.
9. The method for preparing the antibacterial lyocell fiber according to claim 1, wherein:
in the step (4), the air gap of the spinneret is 15-30 mm, the lateral blowing wind speed is 10-15 m/s, the humidity is 5-20 g/kg, and the temperature is 15-20 ℃.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202310940428.3A CN116837475A (en) | 2023-07-28 | 2023-07-28 | Preparation method of antibacterial lyocell fiber |
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| CN202310940428.3A CN116837475A (en) | 2023-07-28 | 2023-07-28 | Preparation method of antibacterial lyocell fiber |
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