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Preparation method of carboxymethyl cellulose cotton

A technology of carboxymethyl cellulose and cellulose cotton, which is applied in the fields of medical science, absorbent pads, bandages, etc., can solve the problems of inability to weave into cloth, high manufacturing cost, etc., and achieve the effect of low manufacturing cost and good water absorption.

Active Publication Date: 2016-04-06
苏州玛福乐斯医疗科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because the current prepared form of carboxymethyl cellulose is powder or block form, it cannot be directly used for weaving into cloth, it must be dissolved and wet-spun to produce fabrics for biomedical use Manufacture of medical items such as dressings, which are expensive to manufacture

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Embodiment 1, a kind of preparation method of carboxymethyl cellulose cotton, comprises the following steps:

[0014] Step 1, alkalization of cellulose: adding degreased cotton to a sodium hydroxide solution with a mass fraction of 25%, reacting at 40°C for 0.5h to obtain alkaline cellulose cotton, wherein the degreased cotton and sodium hydroxide solution The mass ratio is 1:30, and the mass ratio of cellulose to sodium hydroxide is 1:6;

[0015] Step 2, carboxymethylation reaction: adding chloroacetic acid solution with a mass fraction of 50% to alkaline cellulose cotton, wherein the mass ratio of cellulose to chloroacetic acid is 1:3.8, heated to 65°C for 70 minutes , obtaining the basic carboxymethyl cellulose cotton with carboxymethyl substitution degree of 0.35;

[0016] Step 3, neutral treatment: add mass fraction to alkaline carboxymethyl cellulose cotton and be that 10% acetic acid ethanol solution is neutralized, then wash with the mass fraction that is 80% e...

Embodiment 2

[0018] Embodiment 2, a kind of preparation method of carboxymethyl cellulose cotton, comprises the following steps:

[0019] Step 1, alkalization of cellulose: adding defatted cotton to a sodium hydroxide solution with a mass fraction of 27%, reacting at 20°C for 1 hour to obtain alkaline cellulose cotton, wherein the mass fraction of defatted cotton and sodium hydroxide solution Ratio is 1: 30, the mass ratio of cellulose and sodium hydroxide is 1: 6;

[0020] Step 2, carboxymethylation reaction: adding chloroacetic acid solution with a mass fraction of 40% to alkaline cellulose cotton, wherein the mass ratio of cellulose to chloroacetic acid is 1:3, heated to 70°C for 50 minutes , obtaining the basic carboxymethyl cellulose cotton with carboxymethyl substitution degree of 0.33;

[0021] Step 3, neutral treatment: adding mass fraction to alkaline carboxymethyl cellulose cotton is 15% acetic acid ethanol solution to neutralize, and then washes to neutrality with mass fraction...

Embodiment 3

[0023] Embodiment 3, a kind of preparation method of carboxymethyl cellulose cotton, comprises the following steps:

[0024] Step 1, alkalization of cellulose: adding defatted cotton to a sodium hydroxide solution with a mass fraction of 30%, reacting at 5°C for 2 hours to obtain alkaline cellulose cotton, wherein the mass fraction of defatted cotton and sodium hydroxide solution Ratio is 1: 30, the mass ratio of cellulose and sodium hydroxide is 1: 6;

[0025] Step 2, carboxymethylation reaction: adding chloroacetic acid solution with a mass fraction of 30% to alkaline cellulose cotton, wherein the mass ratio of cellulose to chloroacetic acid is 1:2.8, and heated to 75°C for 30 minutes , obtaining the basic carboxymethyl cellulose cotton with carboxymethyl substitution degree of 0.3;

[0026] Step 3, neutral treatment: add mass fraction to alkaline carboxymethyl cellulose cotton and be that 15% acetic acid ethanol solution is neutralized, then wash with the mass fraction of ...

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PUM

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Abstract

The invention discloses a preparation method of carboxymethyl cellulose cotton. The method comprises the following steps: (I) adding absorbent cotton into sodium hydroxide solution with mass fraction of 25-30%, and keeping reactions for 0.5-2h at 5-40 DEG C to obtain alkaline cellulose cotton; (II) adding chloroacetic acid solution with mass fraction of 30-50% into the alkaline cellulose cotton, heating to 65-75 DEG C and keeping reactions for 30-70 minutes to obtain alkaline carboxymethyl cellulose cotton with a carboxymethyl substitution degree of 0.3-0.35; (III) adding an ethanol acetate solution into the alkaline carboxymethyl cellulose cotton for neutralization, and washing with ethanol solution with mass fraction of 80% or more to neutrality to obtain ethanol solution-containing carboxymethyl cellulose cotton; and (IV) drying the ethanol solution-containing carboxymethyl cellulose cotton at 60-80 DEG C to obtain carboxymethyl cellulose cotton with a substitution degree of 0.3-0.35. The beneficial effects of the method are that the state of cotton fiber can be maintained and the cotton can be directly applied to spinning, weaving or production of nonwoven fabric and the like.

Description

technical field [0001] The invention relates to the field of carboxymethyl cellulose production, in particular to a method for preparing carboxymethyl cellulose cotton. Background technique [0002] Carboxymethylcellulose (CMC) is a water-soluble cellulose ether. Its solution is neutral or slightly alkaline, stable to light and heat, and hygroscopic. Its aqueous solution has thickening, film-forming, bonding, moisture retention, Colloidal protection, emulsification and suspension, etc., are widely used in petroleum, food, medicine, textile and paper making and other industries. Because the current prepared form of carboxymethyl cellulose is powder or block form, it cannot be directly used for weaving into cloth, it must be dissolved and wet-spun to produce fabrics for biomedical use The manufacture of medical items such as dressings is expensive to manufacture. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a ...

Claims

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Application Information

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IPC IPC(8): C08B11/12A61L15/28A61L15/42
CPCA61L15/28A61L15/42C08B11/12
Inventor 蓝广芊卢必涛代方银陈景浩余堃刘佳伟
Owner 苏州玛福乐斯医疗科技有限公司
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