Preparation method of sodium alginate fiber for surgical dressing

A sodium alginate and fiber technology, applied in the field of sodium alginate fiber preparation, can solve the problems affecting fiber application and industrial production, low elongation at break, easy to break, etc., achieve excellent practical performance, and increase elongation at break , the effect of excellent performance

Inactive Publication Date: 2017-05-10
周荣
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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...

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0017] Weigh 300g of fresh kelp, wash it repeatedly with deionized water for 3 times, then cut the kelp into pieces of 2cm and 1cm in width, then pour the pieces of kelp into 1L of 3% sodium hydroxide solution In a beaker, soak for 6 hours, filter, remove the filtrate, and pour the soaked kelp fragments into a reaction kettle filled with 600mL deionized water, then seal the reaction kettle, and heat up until the pressure in the reaction kettle reaches 4.5MPa , keep the pressure for 15 minutes; when the pressure keeping is over, open the discharge valve at the bottom of the reactor, let the material in the reactor spray into the receiving tank, wait for natural cooling to room temperature, transfer the material in the receiving tank into a beaker, and then add 200mL of deionized water , with a mass fraction of 3% hydrochloric acid to adjust the pH to 4.2, then transfer the beaker to an ultrasonic oscillator, use 180W power, ultrasonically treat for 45min, filter with suction, re...

example 2

[0020]Weigh 400g of fresh kelp, wash it repeatedly with deionized water for 4 times, then cut the kelp into pieces of 3cm and 2cm in width, then pour the pieces of kelp into 1.5L of 4% sodium hydroxide In a beaker of the solution, soak for 7h, filter, remove the filtrate, and pour the soaked kelp fragments into a reactor filled with 700mL deionized water, then seal the reactor and heat up until the pressure in the reactor reaches 4.8 MPa, keep the pressure for 18min; when the pressure keeping is over, open the discharge valve at the bottom of the reactor, let the material in the reactor spray into the receiving tank, wait for natural cooling to room temperature, transfer the material in the receiving tank into a beaker, and then add 260mL deionized water, adjust the pH to 4.3 with 4% hydrochloric acid, then transfer the beaker to an ultrasonic oscillator, use 200W power, ultrasonically treat for 50min, filter with suction, remove the filter cake, and collect the filtrate; measu...

example 3

[0023] Weigh 500g of fresh kelp, wash it repeatedly with deionized water for 5 times, then cut the kelp into pieces of 4cm and 3cm in width, then pour the pieces of kelp into 2L of 5% sodium hydroxide solution In a beaker, soak for 8 hours, filter, remove the filtrate, and pour the soaked kelp fragments into a reaction kettle filled with 800mL deionized water, then seal the reaction kettle, and heat up until the pressure in the reaction kettle reaches 5.6MPa , keep the pressure for 20min; when the pressure keeping is over, open the discharge valve at the bottom of the reactor, let the material in the reactor spray into the receiving tank, wait for natural cooling to room temperature, transfer the material in the receiving tank into a beaker, and then add 300mL of deionized water , with a mass fraction of 5% hydrochloric acid to adjust the pH to 4.4, then transfer the beaker to an ultrasonic oscillator, use 220W power, ultrasonically treat for 60min, filter with suction, remove ...

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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...

Claims

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Application Information

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IPC IPC(8): D01F9/04D01F8/18D01F8/02D01F1/10D01D5/06A61L26/00
CPCD01F9/04A61L26/0023A61L26/0066A61L26/008A61L2300/232A61L2300/404D01D5/06D01F1/10D01F8/02D01F8/18C08L5/04
Inventor 周荣许洪祥
Owner 周荣
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