Preparation method of sodium alginate fiber for surgical dressing

Abstract

The invention discloses a preparation method of a sodium alginate fiber for surgical dressing, and belongs to the technical field of sodium alginate fiber preparation. The method includes steps of taking fresh kelp as raw materials, immersing the kelp by sodium hydroxide solution after chopping; making the internal fiber of the kelp swell; instantly releasing pressure after heating and preserving pressure, and making the kelp cell tissue break; performing ultrasonic treatment after adjusting pH value by hydrochloric acid; further releasing effective components through cavatition of ultrasound wave; adding calcium chloride to make it settle after ion exchange reaction; after dissolving the sediment by sodium chloride solution, using ethanol as the precipitator; refining the effective components; after filtering and drying, co-mixing and modifying with wheat vital gluten and peach gum at ratio; at last, acquiring the sodium alginate fiber for surgical dressing through spinning, freezing and drying. Through the co-mixing and modification of the high-purity sodium alginate, vital gluten and others, the method improves the flexibility of the sodium alginate fiber, improves the elongation at break, and widens the using scale of the sodium alginate fiber.

Description

technical field [0001] The invention discloses a preparation method of sodium alginate fiber for medical dressing, and belongs to the technical field of sodium alginate fiber preparation. Background technique [0002] Sodium alginate is white or light yellow powder, almost odorless and tasteless, easily soluble in water, insoluble in ethanol, ether, chloroform, etc.; strong hygroscopicity, good water holding capacity; low heat, non-toxic, biodegradable; its stability in It is better when the pH is 6-11, and when it is lower than 6, it forms alginic acid gel, which is insoluble in water; the viscosity is the highest at 7, but it decreases significantly with the increase of temperature; sodium alginate contains free carboxyl groups, and its nature is lively , has a high ion exchange function. After divalent cations such as calcium ions are added to the sodium alginate aqueous solution, the sodium ions in the sodium alginate and the divalent cations undergo an ion exchange rea...

AI Technical Summary

Problems solved by technology

[0005] The technical problem mainly solved by the present invention is: the texture of sodium alginate fiber used in traditional medical dressings is hard and brittle, the elongation at break is low, and it is easy to break during processing and use, which affects the application of the fiber. In order to solve the problem of industrialized production, a method for preparing sodium alginate fibers for medical dressings is provided. The present invention first uses fresh kelp as raw material, chops it and soaks it in sodium hydroxide solution to swell the fibers inside the kelp, and then heats it to preserve the fiber. After depressurization, the pressure is released instantaneously to break the kelp cell tissue and release the active ingredient, then adjust the pH with hydrochloric acid and then perform ultrasonic treatment, and use the cavitation effect of the ultrasonic wave to further release the active ingredient, and then add calcium chloride to make it undergo ion exchange reaction. Precipitate, and then use sodium chloride solution to dissolve the precipitate, use ethanol as the precipitant to refine the active ingredients, filter and dry, blend with wheat gluten and peach gum in proportion to modify, and finally spin and coagulate and dry Get Sodium Alginate Fiber for Medical Dressing