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Processing method for providing moisturizing function for cellulosic fibers based on supercritical CO2 fluid technology

A cellulose fiber and fluid technology technology, which is applied in the processing field of making cellulose fibers with moisturizing function based on supercritical CO2 fluid technology, can solve the problems of relatively low content of functional content, complicated finishing process and single function, etc. Good sustained release effect, good hand feel, and the effect of increasing the effective volume

Active Publication Date: 2018-11-30
SUZHOU UNIV +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The existing development of cosmetic textiles generally adopts chemical finishing methods including coating co-extrusion method, composite finishing method, complexation method, etc. (Handbook of Medical Textiles, 2011, 153). These methods all involve chemical reactions and can There are few types of functional substances that can be reliably applied (mainly limited to hydrophilization and other processing), and the finishing process is relatively complicated, with a single function, which cannot form a long-lasting and controllable slow-release effect
Relatively speaking, the microcapsule technology can control the release, and can prepare many types of functional drugs, but it needs to wrap the functional drugs in the encapsulation material, which involves various physical and chemical reactions. material and particle size are required ("Knitting Industry", 2017 (09): 5-7), and the composition of the capsule is mainly composed of wall thickness, the relative content of functional content is very small, and the capsule is bonded by resin On fiber products, it will affect the feel of textiles

Method used

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  • Processing method for providing moisturizing function for cellulosic fibers based on supercritical CO2 fluid technology
  • Processing method for providing moisturizing function for cellulosic fibers based on supercritical CO2 fluid technology
  • Processing method for providing moisturizing function for cellulosic fibers based on supercritical CO2 fluid technology

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Example 1: Supercritical CO 2 Method for fluid loading of moisturizing drug epigallocatechin gallate to viscose fibers

[0035] First, wash the viscose fabric with ethanol and deionized water, dry and balance for 24 hours and weigh, weigh 8.0% of the viscose fabric weight to take epigallocatechin gallate, prepare a 60% ethanol solution with water, and then prepare 0.09mol / L AOT / ethanol solution, put into a clean container to make microemulsion.

[0036] Put the prepared microemulsion into the medicine tank of the high-pressure equipment, and then put it into the viscose fabric. Cool the CO 2 The gas CO flowing out of the cylinder 2 Cooled into a liquid, the pressure of the high-pressure equipment is set at 29MPa, the temperature is 60°C, and the CO 2 After transforming into a supercritical fluid, immersing and equilibrating for 2 hours, the experiment ended, and viscose fibers loaded with epigallocatechin gallate were obtained. The drug loading of viscose fiber was...

Embodiment 2

[0040] Example 2: Supercritical CO 2 Method of Fluid Loading Moisturizing Drug Erythritol to Hemp Fiber

[0041] Weigh an appropriate amount of hemp fiber, and soak it in an aqueous solution of N-methylmorpholine-N-oxide (NMMO) with a mass fraction of 75% at a bath ratio of 1:25 for 65 minutes at a water bath temperature of 85°C. After the end, take out the hemp fiber fiber.

[0042] After the hemp fiber is washed with ethanol and deionized water, it is dried and balanced for 24 hours and weighed, and erythritol is weighed according to 9.0% of the weight of the hemp fiber, and a 65% ethanol solution is prepared with water, and then a 0.04mol / L AOT / ethanol solution is prepared , put into a clean container to prepare a microemulsion.

[0043] Put the prepared microemulsion into the medicine tank of the high-pressure equipment, and then put the hemp fiber. Use a cooling tank to cool the carbon dioxide gas flowing out of the carbon dioxide cylinder into a liquid. The pressure o...

Embodiment 3

[0047] Example 3: Supercritical CO 2 Method for fluid loading of moisturizing drug mannitol to Tencel fibers

[0048] First, take an appropriate amount of Tencel fiber, wash it with ethanol and deionized water, dry it and weigh it for 24 hours, weigh 9.5% of the weight of Tencel fiber, and prepare 70% ethanol solution with water, and then prepare 0.07mol / L AOT / ethanol solution, put into a clean container to make a microemulsion.

[0049] Put the prepared microemulsion into the medicine tank of the high-pressure equipment, and then put the tencel fiber. Use a cooling tank to cool the carbon dioxide gas flowing out of the carbon dioxide cylinder into a liquid. The pressure of the high-pressure equipment is first set to 10Mpa, the temperature is 65°C, and the CO 2 Become a supercritical fluid, and after immersing and balancing for 20 minutes, the pressure rises to 25MPa at a speed of 0.6MPa / min; after the end, stop heating, and the pressure drops at a speed of 1.0MPa / min until ...

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Abstract

The invention relates to a processing method for providing a moisturizing function for cellulosic fibers based on a supercritical CO2 fluid technology. The processing method comprises: 1) pre-swellingor pre-treating cellulose fibers, 2) adding an auxiliary agent to increase the solubility of a moisturizing agent in a critical CO2 fluid and treating a hydrophilic moisturizing agent hard to dissolve in supercritical CO2 through a supercritical microemulsion / reverse micelle method so that the hydrophilic moisturizing agent is indirectly dissolved in supercritical CO2, 3) adding the moisturizingagent in an agent tank of high pressure equipment, discharging air, feeding CO2 into the agent tank and increasing the pressure in the container to 8-30MPa at 32-120 DEG C to obtain supercritical CO2flows so that the cellulose fibers are immersed in the supercritical CO2 flows and 4) feeding the moisturizing agent dissolved in the supercritical CO2 flows into the pre-swollen cellulose fibers, continuously moving the agent-loading supercritical CO2 relative to the cellulose fibers and releasing the pressure so that the moisturizing agent stays in the amorphous region in the cellulose fiber andan agent-loading cellulose fiber capable of sustained release is formed.

Description

technical field [0001] The present invention relates to a processing method based on supercritical fluid technology to make cellulose fibers functional, more particularly to a method based on supercritical CO 2 Fluid technology is a processing method for cellulose fibers to have a moisturizing function. Background technique [0002] In recent years, with the continuous improvement of people's quality of life, people's demand for clothing has become more and more diversified, for example, from the initial cold-proof and warm-keeping to the later beauty and fashion. Increase. Existing functional clothing mainly focuses on waterproof, UV-proof, breathable, antistatic, moisture-absorbing and quick-drying, quick-perspiration, sun-proof, mosquito-proof and other functions. Combining with textiles to develop characteristic cosmetic textiles, such as textiles with moisturizing, cooling, antibacterial, anti-inflammatory, slimming and other functions, used in people's daily wear, wi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M23/12D06M23/00D06M13/148D06M13/342D06M13/355D06M13/352D06M101/06
CPCD06M13/148D06M13/342D06M13/352D06M13/355D06M23/00D06M23/12D06M2101/06
Inventor 朱维维王红星龙家杰肖红施楣梧
Owner SUZHOU UNIV
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