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CN-122013338-A - Flame-retardant antibacterial skin-friendly functional lyocell fiber and preparation method thereof

CN122013338ACN 122013338 ACN122013338 ACN 122013338ACN-122013338-A

Abstract

The application provides a flame-retardant antibacterial skin-friendly functional lyocell fiber and a preparation method thereof, which belong to the field of fiber materials, wherein microencapsulated melamine phosphate powder and amino acid crosslinked phytic acid solution are prepared, the microencapsulated melamine phosphate powder is soaked in the amino acid crosslinked phytic acid solution, and the modified flame retardant powder is obtained through curing, washing and drying; dissolving pulp in NMMO water solution, adding stabilizer, cross-linking agent and modified flame retardant powder, mixing and reacting to obtain spinning solution, and carrying out ultrasonic treatment and oil bath on the spinning solution to obtain flame-retardant antibacterial skin-friendly functional lyocell fiber. The application utilizes phytic acid and microencapsulated melamine phosphate to modify the lyocell fiber through crosslinking and curing, realizes high-efficiency durable flame-retardant antibacterial effect, has simple preparation process, and can be widely applied to the fields of close-fitting household textile products, medical textile products and the like.

Inventors

  • DONG XIONGWEI
  • LI PENG
  • WANG HAI
  • YE XIAOBO
  • TANG LIN

Assignees

  • 武汉纺织大学

Dates

Publication Date
20260512
Application Date
20260416

Claims (10)

  1. 1. The preparation method of the flame-retardant antibacterial skin-friendly functional lyocell fiber is characterized by comprising the following steps of: s1, preparing microencapsulated melamine phosphate powder; s2, preparing an amino acid crosslinked phytic acid solution; s3, soaking the microencapsulated melamine phosphate powder obtained in the step S1 in the amino acid crosslinked phytic acid solution obtained in the step S2 for a preset time, and then solidifying, washing and drying to obtain modified flame retardant powder; s4, dissolving pulp in an N-methylmorpholine-N-oxide aqueous solution, adding a stabilizer, a cross-linking agent and the modified flame retardant powder obtained in the step S3, and mixing and reacting to obtain a spinning solution; S5, carrying out ultrasonic treatment and oil bath on the spinning solution obtained in the step S4, and spinning to obtain the flame-retardant antibacterial skin-friendly functional lyocell fiber.
  2. 2. The method for preparing flame retardant antimicrobial skin-friendly functional lyocell fiber according to claim 1, wherein in step S1, the method for preparing microencapsulated melamine phosphate powder comprises: S11, grinding melamine phosphate to a particle size of 200-500 nm, and dispersing the melamine phosphate in water to obtain a suspension; S12, adding melamine-formaldehyde prepolymer into the suspension, adjusting the pH to 3-4, reacting for 1-3 hours at 50-70 ℃, heating to 75-85 ℃ for solidification, cooling, filtering, washing and drying to obtain microencapsulated melamine phosphate powder.
  3. 3. The preparation method of the flame-retardant antibacterial skin-friendly functional lyocell fiber according to claim 2, wherein the mass ratio of melamine phosphate to melamine-formaldehyde prepolymer is 1 (1-4).
  4. 4. The preparation method of the flame-retardant antibacterial skin-friendly functional lyocell fiber according to claim 1 is characterized in that in the step S2, the preparation method of the amino acid crosslinked phytic acid solution comprises the steps of adding 1-5% of amino acid into a phytic acid aqueous solution, and stirring uniformly at room temperature to obtain the amino acid crosslinked phytic acid solution.
  5. 5. The preparation method of the flame-retardant antibacterial skin-friendly functional lyocell fiber according to claim 4, wherein the amino acid is one or more of cysteine, glycine, arginine and glutamic acid, and the mass concentration of the phytic acid aqueous solution is 30-50%.
  6. 6. The method for preparing flame-retardant, antibacterial and skin-friendly functional lyocell fiber according to claim 1, wherein in the step S3, the soaking temperature is 55-65 ℃ and the soaking time is 1-3 h; The curing temperature is 75-85 ℃.
  7. 7. The preparation method of the flame-retardant antibacterial skin-friendly functional lyocell fiber according to claim 1, wherein in the step S4, the stabilizer is propyl gallate, the dosage is 0.03-0.05% of the mass of pulp, the cross-linking agent is cysteine, and the dosage is 0.3-1% of the mass of pulp; the consumption of the modified flame retardant powder is 5-30% of the mass of the pulp; the mass concentration of the N-methylmorpholine-N-oxide aqueous solution is 45-65%; the reaction temperature is 45-75 ℃ and the reaction time is 30-60 min.
  8. 8. The method for preparing flame-retardant antibacterial skin-friendly functional lyocell fiber according to claim 1, wherein in step S5, the ultrasonic treatment time is 30-45 min, and the ultrasonic frequency is 50-60 khz; The temperature of the oil bath is 85-105 ℃ and the time is 1-3 hours; The spinning temperature is 90-100 ℃, the spinning speed is 35-50 m/min, the coagulating bath is 20-50wt% of N-methylmorpholine-N-oxide aqueous solution, and the coagulating bath temperature is 35-65 ℃.
  9. 9. The method for preparing flame-retardant, antibacterial and skin-friendly functional lyocell fiber according to claim 1, wherein in step S5, the fiber obtained by spinning is immersed in an amino acid crosslinked phytic acid solution at 45-60 ℃ for 15-25 min.
  10. 10. Flame retardant antimicrobial skin-friendly functional lyocell fiber, characterized in that it is obtainable by a preparation process according to any one of claims 1 to 9.

Description

Flame-retardant antibacterial skin-friendly functional lyocell fiber and preparation method thereof Technical Field The invention relates to the technical field of fiber materials, in particular to a flame-retardant antibacterial skin-friendly functional lyocell fiber and a preparation method thereof. Background With the deep advancement of environmental protection and green development concepts, the requirements of the textile industry on the functionality and sustainability of fiber materials are continuously improved, and the antibacterial performance, the flame retardance and the skin-friendly performance are taken as important safety performance of textiles, so that the important focus of modern textile industry is brought about. The lyocell fiber is taken as a novel green environment-friendly fiber, and gradually becomes an important research object of textile industry by virtue of good biodegradability, moisture absorption, air permeability and comfort. However, the lyocell fiber itself has poor flame retardancy and antibacterial properties, and the effect is remarkably reduced after washing for many times, and thus the safety requirements in daily use cannot be satisfied. Therefore, the development of the textile with durable flame-retardant antibacterial skin-friendly functional lyocell fiber has important significance for the health and safety of infants and the high-quality development of the living standard of people. The antibacterial yarn fabric in the existing market is generally treated by a chemical antibacterial agent, but the yarn can have potential health risks after contacting skin for a long time, and is especially unsuitable for infants and pregnant women, and in addition, the yarn treated by the chemical antibacterial agent has defects in skin-friendly property, so that the comfort requirements of close-fitting clothing or household textiles are difficult to meet. In view of the above, it is necessary to design a flame retardant, antibacterial, skin friendly functional lyocell fiber and a preparation method thereof to solve the above problems. Disclosure of Invention In view of the technical problems existing in the background technology, the application provides a flame-retardant antibacterial skin-friendly functional lyocell fiber and a preparation method thereof, and aims to solve the technical problems that the lyocell fiber lacks flame-retardant and antibacterial functions, and the existing chemical modification means has poor health risk and comfort and insufficient functional durability. In a first aspect, the application provides a preparation method of flame-retardant antibacterial skin-friendly functional lyocell fiber, which comprises the following steps: s1, preparing microencapsulated melamine phosphate powder; s2, preparing an amino acid crosslinked phytic acid solution; s3, soaking the microencapsulated melamine phosphate powder obtained in the step S1 in the amino acid crosslinked phytic acid solution obtained in the step S2 for a preset time, and then solidifying, washing and drying to obtain modified flame retardant powder; s4, dissolving pulp in an N-methylmorpholine-N-oxide aqueous solution, adding a stabilizer, a cross-linking agent and the modified flame retardant powder obtained in the step S3, and mixing and reacting to obtain a spinning solution; S5, carrying out ultrasonic treatment and oil bath on the spinning solution obtained in the step S4, and spinning to obtain the flame-retardant antibacterial skin-friendly functional lyocell fiber. As a further improvement of the present application, in step S1, the method for preparing the microencapsulated melamine phosphate powder comprises: S11, grinding melamine phosphate to a particle size of 200-500 nm, and dispersing the melamine phosphate in water to obtain a suspension; S12, adding melamine-formaldehyde prepolymer into the suspension, adjusting the pH to 3-4, reacting for 1-3 hours at 50-70 ℃, heating to 75-85 ℃ for solidification, cooling, filtering, washing and drying to obtain microencapsulated melamine phosphate powder. The application is further improved, and is characterized in that the mass ratio of the melamine phosphate to the melamine-formaldehyde prepolymer is 1 (1-4). As a further improvement of the application, in the step S2, the preparation method of the amino acid crosslinked phytic acid solution comprises the steps of adding 1-5% of amino acid by mass into the phytic acid aqueous solution, and uniformly stirring at room temperature to obtain the amino acid crosslinked phytic acid solution. As a further improvement of the application, the amino acid is one or more of cysteine, glycine, arginine and glutamic acid, and the mass concentration of the phytic acid aqueous solution is 30-50%. As a further improvement of the application, in the step S3, the soaking temperature is 55-65 ℃ and the soaking time is 1-3 hours; The curing temperature is 75-85 ℃. In the step S4, the stabilizer is propyl ga