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A supercritical co 2 Processing method of fluid technology to make cellulose fiber have antibacterial function

A technology of cellulose fiber and fluid technology, which is applied in the processing field of cellulose fiber with antibacterial function based on supercritical CO2 fluid technology, and can solve the problem of relatively small content of functional content, few types of functional substances, and affecting the feel of textiles, etc. question

Active Publication Date: 2021-04-20
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 fluid technology to make cellulose fiber have antibacterial function
  • A supercritical co <sub>2</sub> Processing method of fluid technology to make cellulose fiber have antibacterial function
  • A supercritical co <sub>2</sub> Processing method of fluid technology to make cellulose fiber have antibacterial function

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Example 1: Supercritical CO 2 Method for Fluid Loading Antibacterial Drug Limonic Acid to Viscose Fiber

[0035] First wash the viscose fabric with ethanol and deionized water, dry and balance for 24 hours and weigh, take ramic acid by weighing 11% of the viscose fabric weight and put it into the medicine tank of the high-pressure equipment, and add 0.1% of the viscose fabric weight of ethanol, and then into the viscose 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 8Mpa, the temperature is 70°C, and the carbon dioxide becomes a supercritical fluid. After impregnation and equilibrium for 15 minutes, the pressure rises to 20MPa at a speed of 0.5MPa / min; Descending until the end of the experiment, the viscose fibers loaded with limonic acid were obtained. The drug loading of viscose fiber was 6.9%.

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

Embodiment 2

[0043] Example 2: Supercritical CO 2 Method for Fluid Loading Antibacterial Drug Tropone to Cotton Fiber

[0044] Weigh an appropriate amount of cotton fiber, soak it in an aqueous solution of N-methylmorpholine-N-oxide (NMMO) with a mass fraction of 70% for 40 minutes at a bath ratio of 1:25, and take out the cotton fiber at a water bath temperature of 80°C. .

[0045] Wash the treated cotton fibers with ethanol and deionized water, dry and balance for 24 hours, weigh them, weigh 7% of the cotton fiber weight, and put tropolone into the medicine tank of the high-pressure equipment, and add cotton fibers 0.08% by weight of methanol, and then put into the cotton fiber. 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 to 18Mpa and the temperature is 80°C. of cotton fibers. The drug loading of cotton fiber was 5.6%.

[0046] In order to analyze the slow-release p...

Embodiment 3

[0050] Example 3: Supercritical CO 2 Method for Fluid Loading Antibacterial Medicine Hippuric Acid to Tencel Fiber

[0051] First, take an appropriate amount of Tencel fabric, wash it with ethanol and deionized water, dry it and weigh it for 24 hours, weigh hippuric acid according to the weight of Tencel fabric at 12%, prepare a 20% ethanol solution with water, and then prepare 0.04mol / L AOT / ethanol solution, put into a clean container to prepare a microemulsion.

[0052] Put the prepared microemulsion into the medicine tank of the high-pressure equipment, and then put it into the Tencel 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 22Mpa and the temperature is 70°C. The carbon dioxide becomes a supercritical fluid. After the impregnation balance for 3H, the experiment ends and the Tencel fiber loaded with hippuric acid is obtained. . The drug lo...

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Abstract

The present invention relates to a kind of based on supercritical CO 2 Fluid technology makes cellulose fibers have antibacterial processing methods, which includes: 1) pre-swelling or pretreatment of cellulose fibers; 2) adding additives to increase the antibacterial drug in supercritical CO 2 Solubility in, for insoluble supercritical CO 2 The hydrophilic antimicrobials were indirectly dissolved in supercritical CO by the method of supercritical microemulsion / reverse micelles. 2 Middle; 3) Add antibacterial drugs to the medicine 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, so that the cellulose fibers are soaked in supercritical fluid; 4) Antibacterial drugs are dissolved in supercritical CO 2 into pre-swelled cellulose fibers, and drug-loaded supercritical CO 2 There is constant relative movement between the fluid and the cellulose fiber, and the antibacterial drug stays in the amorphous area 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 is a processing method to make cellulose fibers have antibacterial 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 special cosmetic textiles, such as textiles with moisturizing, cooling, antibacterial, anti-inflammatory, slimming, insect repellent and other functions, used in people's dai...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D06M10/08D06M101/06
CPCD06M10/08D06M16/00D06M2101/06
Inventor 朱维维龙家杰肖红施楣梧
Owner SUZHOU UNIV