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Preparation method of medical quick imbibition foam material

A foam material, fast technology, applied in the direction of absorbent pads, medical science, bandages, etc., can solve the problems of unreported liquid absorption rate, uneven cell structure, difficult to control the foaming process, etc., to achieve excellent liquid absorption capacity, fast The effect of large absorption capacity and good biocompatibility

Active Publication Date: 2009-08-19
CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the use of sodium bicarbonate or metal magnesium, aluminum, and zinc powder as foaming agent, the reaction is too violent, so the foaming process is difficult to control, and the cell structure is uneven, which affects its liquid absorption effect. This patent does not report the liquid absorption rate. result

Method used

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  • Preparation method of medical quick imbibition foam material
  • Preparation method of medical quick imbibition foam material
  • Preparation method of medical quick imbibition foam material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Mixing ingredients: 65 grams of polyvinyl alcohol with a degree of polymerization of 1700 and a degree of alcoholysis of 98% is dissolved in 950 grams of hot water to form a solution with a mass percentage of 5%, adding 10 grams of sodium lauryl sulfate, 5 grams of dibutyl Sodium naphthalenesulfonate, 30 grams of paraformaldehyde, and 30 grams of cornstarch were evenly mixed and poured into a blender, and stirred for 10 minutes; then added 350 milliliters of sulfuric acid with a mass percentage of 50%, and continued to stir for 40 minutes. Pour the above liquid into an acid-resistant mold, put it in a constant temperature box, react at 30°C for 40 hours to solidify and form, wash, and dry to obtain the target product.

[0021] Physical properties and test methods:

[0022] Liquid absorption rate: After measuring the initial weight (A) of a foam material with a certain size, soak the foam material sample in distilled water, normal saline, and urine for 10 minutes, put it...

Embodiment 2

[0027] Batching mixing: 100 grams of polyvinyl alcohol with a degree of polymerization of 1500 and a degree of alcoholysis of 98% are dissolved in 900 grams of hot water to form a solution with a mass percentage of 10%, adding 10 grams of polyoxyethylene sorbitan monolaurate, Add 10 grams of sodium dodecylbenzenesulfonate, 65 milliliters of formaldehyde solution, and 25 grams of potato starch, mix well and pour into a blender, and stir for 20 minutes; then add 500 milliliters of sulfuric acid with a mass percentage of 50%, and continue stirring for 20 minutes. Pour the above liquid into an acid-resistant mold, put it in a constant temperature box, react at 40°C for 24 hours to solidify and form, wash, and dry to obtain the target product.

[0028] Physical property and test method: with embodiment 1

[0029] The test results are shown in Table 2:

[0030]

Embodiment 3

[0032] Ingredients mixing: 300 grams of polyvinyl alcohol with a degree of polymerization of 2000 and a degree of alcoholysis of 88% are dissolved in 2200 grams of hot water to form a solution with a mass percentage of 12%, and 70 grams of polyoxyethylene sorbitan monopalmitate are added 100 milliliters of formaldehyde solution, 15 grams of paraformaldehyde, 85 grams of cornstarch, mix evenly and pour into the blender, stir for 25 minutes: then add 1150 milliliters of phosphoric acid with a mass percentage of 45%, continue stirring for 25 minutes: pour the above liquid into Put the acid-resistant mold into a constant temperature box, react at 50°C for 10 hours to cure and shape, wash, and dry to obtain the target product.

[0033] Physical property and test method: with embodiment 1

[0034] The test results are shown in Table 3:

[0035]

[0036]

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Abstract

The invention relates to a method for preparing a medical quick liquid-absorbing foam material. The method comprises the steps of well mixing polyvinyl alcohol aqueous solution, aldehyde and a pore-forming agent, adding acid to the mixture, continuing to stir the mixture, pouring the mixed solution into a die, curing and molding the mixed solution, washing and drying the obtained product and obtaining a target object. The material has abundant mutually communicated opening structures through a method of using mechanical foaming together with the pore-forming agent. The prepared material is good in biological compatibility and excellent in hydrophilcity, has the liquid-absorbing capability much higher than common cotton yarn and paper, has the capability of quickly absorbing a large amount of distilled water, physiological saline and urine, turns into soft tenacious elastic sponge after absorbing liquid, is resistant to heat and ultraviolet radiation, and can be disinfected in a plurality of ways. The prepared material is a rigid foam material in a dry state, is a spongy material in a wet state, has the apparent density of between 0.04 and 0.09 g / cm and the liquid-absorbing ratio of between 1,800 and 2,800 percent, and can be applied to medical operations.

Description

technical field [0001] The invention belongs to the field of medical polymer materials, and relates to a preparation method of a medical rapid liquid-absorbing foam material. Background technique [0002] As a medical material, whether it is used as a wound dressing or as a filling for a cave-type wound, it is necessary to absorb the exuded liquid in time and stop the bleeding in time during the operation. Currently, traditional medical materials (such as gauze, cotton balls) are used. etc.) is not satisfactory. [0003] The structure of the foam dressing is porous, it has a large absorption capacity for liquids, and can permeate oxygen and carbon dioxide. The material's treatment of wound exudate is controlled by the water vapor transport and absorption mechanism, and it has good protection for the wound. At present, polyurethane and polyvinyl alcohol foam are the most commonly used dressings. [0004] Chinese patent CN1741824 discloses a polyurethane foam dressing for wo...

Claims

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Application Information

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IPC IPC(8): A61L15/24C08F8/28C08J9/04
Inventor 潘艳雄王伟财彭超罗云霞姬相玲
Owner CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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