A supercritical co 2 Processing method of cellulose fiber with anti-oxidation function by fluid technology

A technology of cellulose fiber and fluid technology, which is applied in the processing field based on supercritical CO2 fluid technology to make cellulose fiber have anti-oxidation function, and can solve the problems of complex finishing process, few types of functional substances, and single function

Active Publication Date: 2021-04-23
SUZHOU UNIV +2
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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 processing such as hydrophilization), 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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  • A supercritical co <sub>2</sub> Processing method of cellulose fiber with anti-oxidation function by fluid technology
  • A supercritical co <sub>2</sub> Processing method of cellulose fiber with anti-oxidation function by fluid technology
  • A supercritical co <sub>2</sub> Processing method of cellulose fiber with anti-oxidation function by fluid technology

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Example 1: Supercritical CO 2 Method of Fluid Loading Antioxidant Drug Veratrol to Modal Fiber

[0035] First, after washing the modal fabric with ethanol and deionized water, dry and balance for 24 hours and weigh it, take veratrol according to 13% of the weight of the modal fabric and put it into the medicine tank of the high-pressure equipment, and add 0.08% ethanol of the weight of the modal fabric , and then into the modal fabric. Cool the CO 2 The gas CO flowing out of the cylinder 2 Cool to liquid.

[0036] The pressure of the high-pressure equipment is first set to 9Mpa, the temperature is 80°C, and the carbon dioxide becomes a supercritical fluid. After immersion balance for 15 minutes, the pressure rises to 26MPa at a speed of 0.7MPa / min; Descending until the end of the experiment resulted in modal fibers loaded with the antioxidant drug veratrol. The drug loading of modal fiber is 7.0%.

[0037] In order to analyze the sustained-release properties of mo...

Embodiment 2

[0040] Example 2: Supercritical CO 2 Method for Fluid Loading Antioxidant Drug Tryptophan to Cotton Fiber

[0041] Weigh an appropriate amount of cotton fiber, and soak it in an aqueous solution of N-methylmorpholine-N-oxide (NMMO) with a mass fraction of 80% for 60 minutes at a bath ratio of 1:25, and the temperature of the water bath is 75°C. After the end, take out the cotton fiber .

[0042] After the cotton fiber is washed with ethanol and deionized water, it is dried and weighed for 24 hours, and tryptophan is weighed according to 9% of the cotton fiber weight, and a 40% ethanol solution is prepared with water, and then a 0.06 mol / 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 in the cotton fiber. Use a cooling tank to cool the gaseous carbon dioxide flowing out of the carbon dioxide cylinder into a liquid. The pressu...

Embodiment 3

[0047] Example 3: Supercritical CO 2 Fluid loading antioxidant drug tyrosine to viscose fiber

[0048] First, take an appropriate amount of viscose fabric, wash it with ethanol and deionized water, dry it and weigh it for 24 hours, weigh tyrosine according to the weight of the viscose fabric at 7%, prepare a 30% ethanol solution with water, and then prepare 0.05mol / 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 it into the viscose fabric. Use a cooling tank to cool the gaseous carbon dioxide flowing out of the carbon dioxide cylinder into a liquid. The pressure of the high-pressure equipment is set at 24Mpa, the temperature is 60°C, and the carbon dioxide becomes a supercritical fluid. After immersion equilibrium for 2H, the experiment ends, and the viscose loaded with tyrosine is obtained. fiber. The drug loading of viscose fiber is 6.0%....

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Abstract

The present invention relates to a kind of based on supercritical CO 2 Fluid technology makes cellulose fibers have anti-oxidation processing method, which includes: 1) pre-swell or pre-treat cellulose fibers; 2) add additives to increase the antioxidant drug in supercritical CO 2 Solubility in, for insoluble supercritical CO 2 The hydrophilic antioxidant drugs were indirectly dissolved in supercritical CO by the method of supercritical microemulsion / reverse micelles. 2 Middle; 3) Add antioxidant drugs into the drug tank of high-pressure equipment, remove air, and introduce CO 2 , at 32-120°C, raise the pressure inside the vessel to 8-30MPa to obtain supercritical CO 2 fluid, whereby the cellulose fibers are soaked in supercritical CO 2 Middle; 4) Antioxidant drugs dissolved in supercritical CO 2 into pre-swelled cellulose fibers, drug-loaded supercritical CO 2 There is constant relative movement between the fluid and the cellulose fiber, and the antioxidant drug stays in the amorphous region inside the cellulose fiber after the pressure is released, forming a drug-loaded cellulose fiber capable of slow release.

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 makes cellulose fibers have anti-oxidative processing methods. 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, anti-oxidation, cooling, antibacterial, anti-inflammatory, slimming and other functions, used in people's daily wear, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D06M13/165D06M13/352D06M13/152D06M13/342D06M13/368D06M23/00D06M101/06
CPCD06M13/152D06M13/165D06M13/342D06M13/352D06M13/368D06M23/00D06M2101/06
Inventor 朱维维龙家杰肖红施楣梧
Owner SUZHOU UNIV
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