Calcium alginate fiber with pH indicating function and preparation method thereof

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 ...

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