Calcium alginate fiber with pH (Potential of Hydrogen) value indicating function and preparation method thereof

A calcium alginate fiber and indicating technology, which is applied in chemical instruments and methods, alginate artificial filaments, organic dyes, etc., can solve the problem of insufficient binding force between acid-base indicators and fibers, narrow discoloration range of color-changing fabrics, and poor indication Avoid problems such as agent falling off, so as to avoid secondary infection, avoid clogging and reduce settlement

Inactive Publication Date: 2016-07-27
WUHAN TEXTILE UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The Chinese patent authorization announcement number is CN204072484U, and the name is a kind of band-aid that can detect wound infection. There are 9 observation holes in the middle of the adhesive plaster layer. The band-aid prepared by this scheme can easily detect the infection of the wound, but the pH indicator used is physically mixed with the cotton wool, and there is no binding force between the two. Therefore, during use, the pH indicator dye is easy to ooze out in a wet environment, and if the dye oozes out and contacts the wound surface, it will cause secondary infection
The Chinese patent publication number is CN105040476A, and the name is a method for preparing pH value color-changing fabrics by using plant dyes. The application discloses that the plant dye solution is extracted first, and then the fabric is pretreated with metal ions, and finally the pretreated fabric is Putting it into the plant dyeing solution for dyeing, the discoloration range of the color-changing fabric prepared by this scheme is narrow, and the metal ion is used in the preparation process
[0007] The acid-base indicator fabric prepared by the above literature has a narrow range of discoloration, which is not enough to help users make accurate judgments, and has the disadvantage of insufficient binding force between the acid-base indicator and the fiber, and the indicator is easy to be removed from the fiber or fabric during use. The surface falls off, causing secondary infection to the wound, which limits its application in the field of medical textiles

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] (1) After washing and crushing the purple sweet potato, add it to an aqueous solution with a mass fraction of ethanol of 50% at a material-to-liquid ratio of 1:10, adjust its pH value to 3 with acetic acid, and then incubate at 50°C for 120 minutes for leaching , after filtering, the natural dye stock solution with the function of changing color at pH value is obtained, and then the stock solution is concentrated, solidified and pulverized to obtain powdered natural dye;

[0030] (2) Weigh the powdered natural dye, prepare a natural dye solution with a mass fraction of 0.03%, and then add sodium alginate 100 times the mass of the natural dye and a molecular weight of 600,000 to the solution, fully stir, and vacuum defoam to obtain spinning solution;

[0031] (3) After the spinning liquid passes through the pressurized metering pump, the fibers are sprayed out from the spinneret with a hole diameter of 0.05mm, and then treated in the coagulation bath of calcium chloride ...

Embodiment 2

[0034](1) After washing and crushing the purple sweet potato, add it to an aqueous solution with a mass fraction of 70% ethanol at a material-to-liquid ratio of 1:30, adjust its pH value to 5 with acetic acid, and then incubate at 70°C for 80 minutes for leaching , after filtering, the natural dye stock solution with the function of changing color at pH value is obtained, and then the stock solution is concentrated, solidified and pulverized to obtain powdered natural dye;

[0035] (2) Weigh the powdered natural dye, prepare a natural dye solution with a mass fraction of 0.05%, then add sodium alginate 80 times the mass of the natural dye and with a molecular weight of 400,000 to the solution, fully stir, and vacuum defoam to obtain spinning solution;

[0036] (3) After the spinning liquid passes through the pressurized metering pump, the fibers are sprayed out from the spinneret with a hole diameter of 0.10 mm, and then treated in the coagulation bath of calcium chloride aque...

Embodiment 3

[0039] (1) After washing and crushing the purple sweet potato, add it to an aqueous solution with a mass fraction of ethanol of 60% at a material-to-liquid ratio of 1:50, adjust its pH value to 4 with acetic acid, and then incubate at 80°C for 60 minutes for leaching , after filtering, the natural dye stock solution with the function of changing color at pH value is obtained, and then the stock solution is concentrated, solidified and pulverized to obtain powdered natural dye;

[0040] (2) Weigh the powdered natural dye, prepare a natural dye solution with a mass fraction of 0.04%, then add sodium alginate 50 times the mass of the natural dye and with a molecular weight of 500,000 to the solution, stir thoroughly, and vacuum defoam to obtain spinning solution;

[0041] (3) After the spinning liquid passes through the pressurized metering pump, the fibers are sprayed out from the spinneret with a hole diameter of 0.08 mm, and then treated in the coagulation bath of calcium chlo...

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Abstract

The invention discloses calcium alginate fiber with a pH (Potential of Hydrogen) value indicating function and a preparation method of the calcium alginate fiber. The preparation method comprises the following steps: (1) preparation of natural dye; (2) preparation of a spinning solution; (3) wet spinning. The prepared and obtained calcium alginate fiber is red and has a pH value indicating function, and the color of the calcium alginate fiber can be subjected to red-purple-blue-green continuous change when the pH value of an external environment is changed from acidity to alkalinity. Raw materials adopted by the calcium alginate fiber have good biocompatibility, the obtained fiber has good color fastness and an obvious pH value discoloring function and can be used for medicinal textiles with the pH value indicating function, such as band-aids and dressing, and real-time monitoring on a wound infection situation is realized.

Description

technical field [0001] The invention relates to the technical field of functional fibers, in particular to a calcium alginate fiber with a pH indicating function and a preparation method thereof. Background technique [0002] Sodium alginate is a natural polysaccharide polymer copolymer composed of β-D-mannuronic acid and α-L-guluronic acid, which is extracted from brown algae plants such as kelp and sargassum. Alginate fibers obtained by wet spinning have good water absorption and water retention properties and gel properties, so they have been widely used in the preparation of medical dressings in recent years. However, the same as other medical dressings made of fibers, the patient's wound infection can only be found when the dressing is removed, and if the wound infection cannot be detected and treated in time, it will undoubtedly prolong the healing period of the wound, and will cause serious damage to the patient. Bring additional pain. [0003] Medical research has ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F9/04D01F1/06C09B61/00
CPCC09B61/00D01F1/06D01F9/04
Inventor 颜超朱平张传杰
Owner WUHAN TEXTILE UNIV
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