CN120291362A - Wrinkle-resistant and wear-resistant flax blended yarn and processing technology thereof - Google Patents
Wrinkle-resistant and wear-resistant flax blended yarn and processing technology thereof Download PDFInfo
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Abstract
本发明公开了一种抗皱耐磨亚麻混纺纱线及其加工工艺，涉及纺织技术领域；所制亚麻混纺纱线包括天然纤维和改性聚乳酸纤维以及超高分子量聚乙烯纤维；其中天然纤维由亚麻纤维和竹纤维进行脱胶预处理后，与棉纤维混合得到；在纤维表面通过多巴胺聚合沉积氧化石墨烯，提高纱线的耐磨性能；改性聚乳酸纤维通过聚乳酸、聚己二酸/对苯二甲酸丁二酯和改性甲壳素纳米纤维熔融纺丝得到，其中甲壳素纳米纤维通过聚乙二醇改善与聚乳酸的相容性，增强聚乳酸纤维；以上通过精梳并条、粗纱细纱得到粗品纱线，浸扎于整理剂中，最终得到成品混纺纱线，具有不错的耐磨性和抗皱性。The invention discloses a wrinkle-resistant and wear-resistant flax blended yarn and a processing technology thereof, and relates to the field of textile technology. The prepared flax blended yarn comprises natural fiber, modified polylactic acid fiber and ultra-high molecular weight polyethylene fiber. The natural fiber is obtained by mixing flax fiber and bamboo fiber with cotton fiber after degumming pretreatment. Graphene oxide is deposited on the fiber surface by dopamine polymerization to improve the wear resistance of the yarn. The modified polylactic acid fiber is obtained by melt spinning polylactic acid, polybutylene adipate/terephthalate and modified chitin nanofiber, wherein the chitin nanofiber is improved in compatibility with polylactic acid by polyethylene glycol to strengthen the polylactic acid fiber. The above coarse yarn is obtained by combing and drawing, roving and spun yarn, and is immersed in a finishing agent to finally obtain a finished blended yarn with good wear resistance and wrinkle resistance.
Description
Technical Field
The invention relates to the technical field of textile, in particular to crease-resistant wear-resistant flax blended yarn and a processing technology thereof.
Background
Flax fiber, which is a natural cellulosic fiber of long history, has long been widely used in the field of high-end textiles due to its excellent moisture absorption and breathability, antibacterial properties, and environmental friendliness. However, pure flax yarns have limited their wide application in modern apparel and industrial textiles due to inherent defects of high fiber stiffness, low elastic recovery, susceptibility to wrinkling, and the like.
In recent years, with the increase of the diversified and functional demands of textile materials, the combination of flax and other fibers by blending technology becomes an important research direction for improving the spinnability, mechanical properties and wearing comfort of the textile materials. For example, the blending of the flax and the cotton fiber can relieve the itching feeling of the flax, but the crease resistance is still not ideal, and the blending of the flax and the cotton fiber can improve the dimensional stability, but the environmental protection advantage of the natural fiber is sacrificed. In this context, new yarn systems with bio-based synthetic fibers (e.g. polylactic acid PLA) or functional regenerated fibers (e.g. lyocell, chitin fibers) as blend components are gaining attention. The blended yarn can inherit the natural characteristics of flax, and can realize the synergistic promotion of the functions of crease resistance, wear resistance and the like through the performance complementation among fibers. However, the problems of weak interface bonding between fibers, insufficient optimization of blending process parameters and the like still remain key challenges for restricting the industrialized application of the fibers. Therefore, how to construct a flax blended yarn system with durability and crease resistance becomes an important research topic in the field of current textile materials.
Disclosure of Invention
The invention aims to provide an anti-wrinkle wear-resistant flax blended yarn and a processing technology thereof, so as to solve the problems in the prior art.
In order to achieve the above purpose, the present invention provides the following technical solutions:
A processing technology of crease-resistant wear-resistant flax blended yarn comprises the following processing steps:
Step 1, mixing flax fiber and bamboo fiber, placing the mixture into pectinase liquid, pretreating the mixture for 1 to 1.5 hours at a temperature of between 40 and 50 ℃, transferring the mixture into alkali liquor after washing, treating the mixture for 1 to 1.5 hours at a temperature of between 50 and 60 ℃, taking out, washing, drying and mixing cotton fiber for standby to obtain natural mixed fiber;
Step 2, mixing and melt spinning the modified chitin nano fibers with polylactic acid, poly adipic acid/butylene terephthalate and dicumyl peroxide to obtain modified polylactic acid fibers, mixing and combing the flax mixed fibers prepared in the step 1 with the modified polylactic acid fibers to obtain first combed strips, mixing and combing the flax mixed fibers prepared in the step 1 with the ultra-high molecular weight polyethylene fibers to obtain second combed strips, and combing the flax mixed fibers to obtain third combed strips;
and 3, placing the obtained crude yarn in a sodium hydroxide solution for treatment for 30-40min, cleaning, immersing in a finishing agent, treating for 3-5min, and drying to obtain a finished product.
Preferably, the modified chitin nanofiber is processed by the steps of respectively placing toluene diisocyanate, polyethylene glycol and chitin nanofiber in N, N-dimethylformamide, preparing a solution a, a solution b and a solution C, adding dibutyltin dilaurate into the solution a, heating to 60-70 ℃, dropwise adding the solution b, reacting until the-NCO content is 0.01-0.02%, adding the solution C, heating to 70-80 ℃, reacting for 8-10h, separating, washing with alcohol water, and drying to obtain the modified chitin nanofiber.
Preferably, the mass ratio of the flax fiber to the bamboo fiber to the cotton fiber in the step 1 is 5 (1-3) (1-2), the concentration ratio of the polyethylenimine to the dopamine hydrochloride is 1 (1-3) g/mL, and the concentration of the graphene oxide solution is 0.2-0.5g/mL.
Preferably, in the step 1, the concentration of the pectase liquid is 1-3g/L, pH and 3-4, the feed-liquid ratio is 1:20, the alkali liquid comprises 5-8% sodium hydroxide, 6-10% hydrogen peroxide, 3-5% sodium carbonate, 2-5% urea and the balance deionized water, and the feed-liquid ratio is 1:15.
Preferably, the modified polylactic acid fiber in the step 2 comprises the following raw materials, by mass, 80-100 parts of polylactic acid, 12-15 parts of poly (adipic acid)/butylene terephthalate, 15-18 parts of modified chitin nanofiber and 0.05-0.07 part of dicumyl peroxide, wherein the temperature of melt spinning is 200-220 ℃.
Preferably, the dosage ratio of the flax mixed fiber to the modified polylactic acid fiber to the ultra-high molecular weight fiber in the step 2 is 100 (40-50) to 5-10.
Preferably, the dosage ratio of the chitin nanofiber to the toluene diisocyanate to the polyethylene glycol is 1 (0.2-0.3) (2-3).
Preferably, the finishing agent comprises 3-10% of silk fibroin solution, 3g/L of chitosan, 20g/L of 1,2,3, 4-butane tetracarboxylic acid, 10g/L of triethanolamine and 40g/L of secondary sodium phosphite, and the concentration of sodium hydroxide is 20g/L.
Compared with the prior art, the invention has the beneficial effects that:
1. The fiber is blended by adopting natural fibers such as flax and the like and bio-based synthetic fibers, the sources of raw materials are safe, wherein the natural fibers are degummed together by using pectinase and chemical alkali treatment, fiber damage is reduced, high quality of the fibers is realized, dopamine and graphene oxide are deposited on the surfaces of the fibers through dipping, and the interfacial binding force of the graphene oxide on the surfaces of the fibers is improved through polydopamine and polyethyleneimine, so that the fibers with the surfaces covered with graphene oxide nano layers are obtained, the wear resistance of the yarns prepared subsequently is improved, and an antibacterial effect is brought;
2. The bio-based synthetic fiber polylactic acid improves the toughness of the polylactic acid by adding the poly (adipic acid)/butylene terephthalate and the modified chitin nanofiber, improves the compatibility and toughness of the polylactic acid, improves the spinnability of the melt-spun polylactic acid fiber, and further improves the compatibility of the chitin nanofiber and the polylactic acid by inserting polyethylene glycol into the chitin nanofiber through graft copolymerization;
3. The crude yarn prepared by the method further improves the integral crease-resistant effect of the yarn by the action of sodium hydroxide and finishing agent, and brings better application effect.
Detailed Description
The following description of the technical solutions in the embodiments of the present invention will be clear and complete, and it is obvious that the described embodiments are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the experiment, the length of the flax fiber is 20-25mm, the length of the bamboo fiber is 10-15mm, the length of the cotton fiber is 20-25mm, the length of the ultra-high molecular weight polyethylene fiber is 50-55mm, the sheet diameter of the graphene oxide is 0.5-5 mu m, the polyethylene imine 1800Da, the polylactic acid 6kDa, the poly (adipic acid)/butylene terephthalate 120kDa, the polyethylene glycol 4kDa, the silk fibroin 6-10kDa and the chitosan viscosity is 100-200mpa.s;
The pectase concentration is 1g/L, and the alkali liquor comprises 8% sodium hydroxide, 8% hydrogen peroxide, 3% sodium carbonate, 5% urea and the balance deionized water;
The microwave irradiation power is 300W;
the unified specification of the yarn is 16.6tex twist 830.4 turns/m;
example 1 this embodiment provides a processing technology of crease-resistant wear-resistant flax blended yarn, which comprises the following specific steps:
Step 1, mixing 50 parts of flax fibers and 30 parts of bamboo fibers in pectinase liquid, pretreating for 1h at 50 ℃ according to a feed-liquid ratio of 1:20, washing, transferring into alkali liquid, treating for 1.5h at 60 ℃ according to a feed-liquid ratio of 1:15, taking out, washing, drying and mixing 20 parts of cotton fibers for standby to obtain natural mixed fibers, putting polyethylene imine into Tris buffer solution, adding dopamine hydrochloride to form mixed liquid with the concentration of the polyethylene imine of 1g/mL and the concentration of the dopamine hydrochloride of 2g/mL, pouring into the natural mixed fibers after stirring uniformly, soaking for 3h, taking out, washing, immersing in graphene oxide solution with the concentration of 0.3g/mL, performing ultrasonic dispersion for 5min, washing, and drying to obtain flax mixed fibers;
Step 2, mixing 6 parts of modified chitin nano fibers with 34 parts of polylactic acid, 5 parts of poly (adipic acid)/butylene terephthalate and 0.02 part of dicumyl peroxide, performing melt spinning at 220 ℃ to obtain modified polylactic acid fibers, mixing and combing the flax mixed fibers prepared in the step 1 with the modified polylactic acid fibers to obtain first combed strips, mixing and combing the flax mixed fibers prepared in the step 1 with ultrahigh molecular weight polyethylene fibers to obtain second combed strips, and combing the flax mixed fibers to obtain third combed strips;
And 3, placing the obtained crude yarn in a 20g/L sodium hydroxide solution for treatment for 40min, cleaning, immersing in a finishing agent, and drying after treatment 3 to obtain a finished product, wherein the finishing agent comprises 8% of silk fibroin solution, 3g/L chitosan, 20 g/L1, 2,3, 4-butane tetracarboxylic acid, 10g/L triethanolamine and 40g/L secondary sodium phosphite.
The processing steps of the modified chitin nanofiber comprise the steps of respectively placing 0.43g of toluene diisocyanate, 5g of polyethylene glycol and 2g of chitin nanofiber in N, N-dimethylformamide, preparing a solution a, a solution b and a solution C, adding 0.02g of dibutyltin dilaurate into the solution a, heating to 70 ℃, dropwise adding the solution b, reacting until the-NCO content is about 0.019%, adding the solution C, heating to 80 ℃, separating after reacting for 10 hours, washing with alcohol and water, and drying to obtain the modified chitin nanofiber.
Example 2 this embodiment provides a processing technology of crease-resistant wear-resistant flax blended yarn, which comprises the following specific steps:
step 1, mixing 50 parts of flax fibers and 30 parts of bamboo fibers in pectinase liquid, pretreating for 1h at 50 ℃ according to a feed-liquid ratio of 1:20, washing, transferring into alkali liquid, treating for 1.5h at 60 ℃ according to a feed-liquid ratio of 1:15, taking out, washing, drying and mixing 20 parts of cotton fibers for standby to obtain natural mixed fibers, putting polyethylene imine into Tris buffer solution, adding dopamine hydrochloride to form mixed liquid with the concentration of the polyethylene imine of 1g/mL and the concentration of the dopamine hydrochloride of 3g/mL, pouring into the natural mixed fibers after stirring uniformly, soaking for 3h, taking out, washing, immersing in graphene oxide solution with the concentration of 0.5g/mL, performing ultrasonic dispersion for 5min, washing, and drying to obtain flax mixed fibers;
Step 2, mixing 6 parts of modified chitin nano fibers with 37 parts of polylactic acid, 5.5 parts of poly (adipic acid)/butylene terephthalate and 0.02 part of dicumyl peroxide, performing melt spinning at 220 ℃ to obtain modified polylactic acid fibers, mixing and combing the flax mixed fibers prepared in the step 1 and the modified polylactic acid fibers to obtain first combed sliver, mixing and combing the flax mixed fibers prepared in the step 1 and the ultrahigh molecular weight polyethylene fibers to obtain second combed sliver, and combing the flax mixed fibers to obtain third combed sliver;
and 3, placing the obtained crude yarn in a20 g/L sodium hydroxide solution for treatment for 40min, cleaning, immersing in a finishing agent, and drying after treatment 3 to obtain a finished product, wherein the finishing agent comprises 10% of silk fibroin solution, 3g/L chitosan, 20 g/L1, 2,3, 4-butane tetracarboxylic acid, 10g/L triethanolamine and 40g/L secondary sodium phosphite.
The processing steps of the modified chitin nanofiber comprise the steps of respectively placing 0.43g of toluene diisocyanate, 5g of polyethylene glycol and 2g of chitin nanofiber in N, N-dimethylformamide, preparing a solution a, a solution b and a solution C, adding 0.02g of dibutyltin dilaurate into the solution a, heating to 70 ℃, dropwise adding the solution b, reacting until the-NCO content is about 0.019%, adding the solution C, heating to 80 ℃, separating after reacting for 10 hours, washing with alcohol and water, and drying to obtain the modified chitin nanofiber.
Example 3 this embodiment provides a processing technology of crease-resistant wear-resistant flax blended yarn, which comprises the following specific steps:
Step 1, mixing 50 parts of flax fibers and 30 parts of bamboo fibers in pectinase liquid, pretreating for 1h at 50 ℃ according to a feed-liquid ratio of 1:20, washing, transferring into alkali liquid, treating for 1.5h at 60 ℃ according to a feed-liquid ratio of 1:15, taking out, washing, drying and mixing 20 parts of cotton fibers for standby to obtain natural mixed fibers, putting polyethylene imine into Tris buffer solution, adding dopamine hydrochloride to form mixed liquid with the concentration of the polyethylene imine of 1g/mL and the concentration of the dopamine hydrochloride of 1g/mL, pouring into the natural mixed fibers after stirring uniformly, soaking for 3h, taking out, washing, immersing in graphene oxide solution with the concentration of 0.2g/mL, performing ultrasonic dispersion for 5min, washing, and drying to obtain flax mixed fibers;
step 2, mixing 6 parts of modified chitin nano fibers with 32 parts of polylactic acid, 4.5 parts of poly (adipic acid)/butylene terephthalate and 0.02 part of dicumyl peroxide, performing melt spinning at 220 ℃ to obtain modified polylactic acid fibers, mixing and combing the flax mixed fibers prepared in the step 1 and the modified polylactic acid fibers to obtain first combed sliver, mixing and combing the flax mixed fibers prepared in the step 1 and the ultrahigh molecular weight polyethylene fibers to obtain second combed sliver, and combing the flax mixed fibers to obtain third combed sliver;
And 3, placing the obtained crude yarn in a 20g/L sodium hydroxide solution for treatment for 40min, cleaning, immersing in a finishing agent, and drying after treatment 3 to obtain a finished product, wherein the finishing agent comprises 3% of silk fibroin solution, 3g/L chitosan, 20 g/L1, 2,3, 4-butane tetracarboxylic acid, 10g/L triethanolamine and 40g/L secondary sodium phosphite.
The processing steps of the modified chitin nanofiber comprise the steps of respectively placing 0.43g of toluene diisocyanate, 5g of polyethylene glycol and 2g of chitin nanofiber in N, N-dimethylformamide, preparing a solution a, a solution b and a solution C, adding 0.02g of dibutyltin dilaurate into the solution a, heating to 70 ℃, dropwise adding the solution b, reacting until the-NCO content is about 0.019%, adding the solution C, heating to 80 ℃, separating after reacting for 10 hours, washing with alcohol and water, and drying to obtain the modified chitin nanofiber.
Comparative example 1 as a control experiment for example 1, no post-treatment was performed on the natural blend, and the specific procedure was as follows:
Step 1, mixing 50 parts of flax fibers and 30 parts of bamboo fibers in pectinase liquid, pretreating for 1h at 50 ℃ according to a feed-liquid ratio of 1:20, cleaning, transferring into alkali liquid, treating for 1.5h at 60 ℃ according to a feed-liquid ratio of 1:15, taking out, cleaning, drying and mixing 20 parts of cotton fibers for standby to obtain natural mixed fibers;
Step 2, mixing 6 parts of modified chitin nano fibers with 34 parts of polylactic acid, 5 parts of poly (adipic acid)/butylene terephthalate and 0.02 part of dicumyl peroxide, performing melt spinning at 220 ℃ to obtain modified polylactic acid fibers, mixing and combing the natural mixed fibers prepared in the step 1 and the modified polylactic acid fibers to obtain first combed strips, mixing and combing the natural mixed fibers prepared in the step 1 and the ultra-high molecular weight polyethylene fibers to obtain second combed strips, and combing the natural mixed fibers to obtain third combed strips;
And 3, placing the obtained crude yarn in a 20g/L sodium hydroxide solution for treatment for 40min, cleaning, immersing in a finishing agent, and drying after treatment 3 to obtain a finished product, wherein the finishing agent comprises 8% of silk fibroin solution, 3g/L chitosan, 20 g/L1, 2,3, 4-butane tetracarboxylic acid, 10g/L triethanolamine and 40g/L secondary sodium phosphite.
The processing steps of the modified chitin nanofiber comprise the steps of respectively placing 0.43g of toluene diisocyanate, 5g of polyethylene glycol and 2g of chitin nanofiber in N, N-dimethylformamide, preparing a solution a, a solution b and a solution C, adding 0.02g of dibutyltin dilaurate into the solution a, heating to 70 ℃, dropwise adding the solution b, reacting until the-NCO content is about 0.019%, adding the solution C, heating to 80 ℃, separating after reacting for 10 hours, washing with alcohol and water, and drying to obtain the modified chitin nanofiber.
Comparative example 2 for the control experiment of example 1, no modification treatment was performed on the chitin nanofibers, and the specific steps were as follows:
Step 1, mixing 50 parts of flax fibers and 30 parts of bamboo fibers in pectinase liquid, pretreating for 1h at 50 ℃ according to a feed-liquid ratio of 1:20, washing, transferring into alkali liquid, treating for 1.5h at 60 ℃ according to a feed-liquid ratio of 1:15, taking out, washing, drying and mixing 20 parts of cotton fibers for standby to obtain natural mixed fibers, putting polyethylene imine into Tris buffer solution, adding dopamine hydrochloride to form mixed liquid with the concentration of the polyethylene imine of 1g/mL and the concentration of the dopamine hydrochloride of 2g/mL, pouring into the natural mixed fibers after stirring uniformly, soaking for 3h, taking out, washing, immersing in graphene oxide solution with the concentration of 0.3g/mL, performing ultrasonic dispersion for 5min, washing, and drying to obtain flax mixed fibers;
Step 2, mixing 6 parts of chitin nano fibers with 34 parts of polylactic acid, 5 parts of poly (adipic acid)/butylene terephthalate and 0.02 part of dicumyl peroxide, performing melt spinning at 220 ℃ to obtain modified polylactic acid fibers, mixing and combing the flax mixed fibers prepared in the step 1 with the modified polylactic acid fibers to obtain first combed strips, mixing and combing the flax mixed fibers prepared in the step 1 with the ultrahigh molecular weight polyethylene fibers to obtain second combed strips, and combing the flax mixed fibers to obtain third combed strips;
And 3, placing the obtained crude yarn in a 20g/L sodium hydroxide solution for treatment for 40min, cleaning, immersing in a finishing agent, and drying after treatment 3 to obtain a finished product, wherein the finishing agent comprises 8% of silk fibroin solution, 3g/L chitosan, 20 g/L1, 2,3, 4-butane tetracarboxylic acid, 10g/L triethanolamine and 40g/L secondary sodium phosphite.
Comparative example 3 for the control experiment of example 1, the crude yarn was not subjected to alkali treatment and finishing, the specific steps were as follows:
Step 1, mixing 50 parts of flax fibers and 30 parts of bamboo fibers in pectinase liquid, pretreating for 1h at 50 ℃ according to a feed-liquid ratio of 1:20, washing, transferring into alkali liquid, treating for 1.5h at 60 ℃ according to a feed-liquid ratio of 1:15, taking out, washing, drying and mixing 20 parts of cotton fibers for standby to obtain natural mixed fibers, putting polyethylene imine into Tris buffer solution, adding dopamine hydrochloride to form mixed liquid with the concentration of the polyethylene imine of 1g/mL and the concentration of the dopamine hydrochloride of 2g/mL, pouring into the natural mixed fibers after stirring uniformly, soaking for 3h, taking out, washing, immersing in graphene oxide solution with the concentration of 0.3g/mL, performing ultrasonic dispersion for 5min, washing, and drying to obtain flax mixed fibers;
Step 2, mixing 6 parts of modified chitin nano fibers with 34 parts of polylactic acid, 5 parts of poly (adipic acid)/butylene terephthalate and 0.02 part of dicumyl peroxide, melt spinning at 220 ℃ to obtain modified polylactic acid fibers, mixing and combing the flax mixed fibers prepared in step 1 with the modified polylactic acid fibers to obtain first combed sliver, mixing and combing the flax mixed fibers prepared in step 1 with the ultra-high molecular weight polyethylene fibers to obtain second combed sliver, and combing the flax mixed fibers to obtain third combed sliver, and performing roving procedures after drawing the first combed sliver, the second combed sliver and the second combed sliver, and spinning and spooling to obtain crude yarns, wherein the dosage ratio of the flax mixed fibers to the modified polylactic acid fibers to the ultra-high molecular weight fibers is 100:45.02:8.
The processing steps of the modified chitin nanofiber comprise the steps of respectively placing 0.43g of toluene diisocyanate, 5g of polyethylene glycol and 2g of chitin nanofiber in N, N-dimethylformamide, preparing a solution a, a solution b and a solution C, adding 0.02g of dibutyltin dilaurate into the solution a, heating to 70 ℃, dropwise adding the solution b, reacting until the-NCO content is about 0.019%, adding the solution C, heating to 80 ℃, separating after reacting for 10 hours, washing with alcohol and water, and drying to obtain the modified chitin nanofiber.
Detection test
1. Breaking strength measurement, test by referring to GB/T3916-2013 method of measurement of breaking Strength and elongation at break (CRE method) of individual yarn of textile package yarn, record breaking strength in Table 1;
2. The abrasion resistance test is carried out by referring to FZ/T01058-1999 reciprocating grinding roller method of yarn abrasion resistance test method, adopting LFY-109A type computer multifunctional yarn abrasion resistance tester, wherein each experimental parameter is that the friction speed is 60 times/min, the weight is 10g, the abrasive paper is 600, and the average friction times are recorded in the table 1;
3. Crease resistance test the yarns prepared in examples 1-3 and comparative examples 1-3 were woven to prepare fabric samples with warp densities of 62 yarns/cm and weft densities of 34 yarns/cm, and the average warp and weft directions were calculated in Table 1 according to GB/T3819-1997 test fabric crease recovery angle for determination of recovery angle for fold recovery of textile fabrics.
TABLE 1
From the data, it is clear that the example 1 has better performance than other examples, the comparative example 1 does not carry out polydopamine and graphene oxide deposition on the natural fiber mixing surface and has obvious influence on the wear resistance of the yarn, the comparative example 2 does not carry out polyethylene glycol modification on the chitin nanofiber and has great influence on the breaking strength of the yarn, the polyethylene glycol modified chitin nanofiber can effectively improve the compatibility of the chitin nanofiber in polylactic acid so as to achieve the enhancement effect, and the comparative example 3 does not carry out finishing, but the reduction of the crease recovery angle is obvious, and the finishing agent effectively improves the crease resistance of the yarn.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Claims (8)
1. The processing technology of the crease-resistant wear-resistant flax blended yarn is characterized by comprising the following processing steps of:
Step 1, mixing flax fiber and bamboo fiber, placing the mixture into pectinase liquid, pretreating the mixture for 1 to 1.5 hours at a temperature of between 40 and 50 ℃, transferring the mixture into alkali liquor after washing, treating the mixture for 1 to 1.5 hours at a temperature of between 50 and 60 ℃, taking out, washing, drying and mixing cotton fiber for standby to obtain natural mixed fiber;
Step 2, mixing and melt spinning the modified chitin nano fibers with polylactic acid, poly adipic acid/butylene terephthalate and dicumyl peroxide to obtain modified polylactic acid fibers, mixing and combing the flax mixed fibers prepared in the step 1 with the modified polylactic acid fibers to obtain first combed strips, mixing and combing the flax mixed fibers prepared in the step 1 with the ultra-high molecular weight polyethylene fibers to obtain second combed strips, and combing the flax mixed fibers to obtain third combed strips;
and 3, placing the obtained crude yarn in a sodium hydroxide solution for treatment for 30-40min, cleaning, immersing in a finishing agent, treating for 3-5min, and drying to obtain a finished product.
2. The processing technology of the crease-resistant wear-resistant flax blended yarn is characterized in that the processing steps of the modified chitin nanofiber are as follows, toluene diisocyanate, polyethylene glycol and the chitin nanofiber are respectively placed in N, N-dimethylformamide to prepare a solution a, a solution b and a solution C, dibutyl tin dilaurate is added into the solution a, the solution a is heated to 60-70 ℃, the solution b is dripped, the reaction is carried out until the-NCO content is 0.01-0.02%, the solution C is added, the temperature is raised to 70-80 ℃, the separation is carried out after the reaction is carried out for 8-10 hours, and the modified chitin nanofiber is obtained after washing with alcohol water and drying.
3. The processing technology of the crease-resistant wear-resistant flax blended yarn is characterized in that in the step 1, the mass ratio of flax fiber to bamboo fiber to cotton fiber is 5 (1-3): 1-2, the concentration ratio of polyethylene imine to dopamine hydrochloride is 1 (1-3) g/mL, and the concentration of graphene oxide solution is 0.2-0.5g/mL.
4. The processing technology of the crease-resistant wear-resistant flax blended yarn according to claim 1, wherein in the step 1, the concentration of pectinase liquid is 1-3g/L, pH and 3-4, the feed-liquid ratio is 1:20, alkali liquor comprises 5-8% sodium hydroxide, 6-10% hydrogen peroxide, 3-5% sodium carbonate, 2-5% urea and the balance deionized water, and the feed-liquid ratio is 1:15.
5. The processing technology of the crease-resistant wear-resistant flax blended yarn is characterized in that the modified polylactic acid fiber in the step 2 comprises the following raw materials, by mass, 80-100 parts of polylactic acid, 12-15 parts of poly (adipic acid)/butylene terephthalate, 15-18 parts of modified chitin nanofiber and 0.05-0.07 part of dicumyl peroxide, and the temperature of melt spinning is 200-220 ℃.
6. The processing technology of the crease-resistant wear-resistant flax blended yarn is characterized in that the dosage ratio of flax mixed fiber to modified polylactic acid fiber to ultra-high molecular weight fiber in the step 2 is 100 (40-50): 5-10.
7. The processing technology of the crease-resistant wear-resistant flax blended yarn according to claim 2, wherein the dosage ratio of the chitin nanofiber to the toluene diisocyanate to the polyethylene glycol is 1 (0.2-0.3) (2-3).
8. The processing technology of the crease-resistant wear-resistant flax blended yarn according to claim 1, wherein the finishing agent comprises 3-10% of silk fibroin solution, 3g/L of chitosan, 20g/L of 1,2,3, 4-butane tetracarboxylic acid, 10g/L of triethanolamine and 40g/L of secondary sodium phosphite, and the concentration of sodium hydroxide is 20g/L.
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| CN (1) | CN120291362A (en) |
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