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Preparation method of carboxymethyl cellulose fiber

A technology of carboxymethyl cellulose and cellulose fibers, applied in the field of preparation of carboxymethyl cellulose fibers, can solve problems such as insoluble carboxymethyl cellulose, increase wettability and adsorption, and reduce the growth of bacteria , good hydrophilic effect

Active Publication Date: 2022-05-13
浙江隆腾新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] 1. It is carried out in the form of post-treatment of cellulose fibers to solve the problem that carboxymethyl cellulose is difficult to dissolve into spinning stock solution for wet spinning to make fibers

Method used

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  • Preparation method of carboxymethyl cellulose fiber
  • Preparation method of carboxymethyl cellulose fiber

Examples

Experimental program
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Effect test

Embodiment 1

[0047] Embodiment 1 A kind of preparation method of carboxymethyl cellulose fiber, comprises the following steps:

[0048] A method for preparing carboxymethyl cellulose fibers, comprising the steps of alkalization, etherification and post-treatment.

[0049] S1, alkalization

[0050] The viscose fiber is basified with sodium hydroxide in anhydrous ethanol and water to form alkali cellulose fiber.

[0051] The ratio of the absolute ethanol to water is 58:1.5; the ratio of the viscose fiber to the solvent is 12.5:59.5; the addition of the sodium hydroxide is 16% of the viscose fiber.

[0052] The fineness of the viscose fiber is 3dtex, and the cut length is 38mm.

[0053] Preferably, the temperature of the alkalization reaction is 45° C., and the reaction time is 60 minutes.

[0054] S2, etherification

[0055] Put the alkali cellulose fibers in a stirring reaction pot, add monochloroacetic acid and absolute ethanol, then add cetyltrimethylammonium bromide, start the stirri...

Embodiment 2

[0068] Embodiment 2 A kind of preparation method of carboxymethyl cellulose fiber, comprises the following steps:

[0069] A method for preparing carboxymethyl cellulose fibers, comprising the steps of alkalization, etherification and post-treatment.

[0070] S1, alkalization

[0071] The viscose fiber is basified with sodium hydroxide in anhydrous ethanol and water to form alkali cellulose fiber.

[0072] The ratio of the absolute ethanol to water is 55:1.2; the ratio of the viscose fiber to the solvent is 12:59; the added amount of the sodium hydroxide is 15% of the viscose fiber.

[0073] The fineness of the viscose fiber is 1.1 dtex, and the cut length is 16 mm.

[0074] Preferably, the temperature of the alkalization reaction is 40° C., and the reaction time is 70 minutes.

[0075] S2, etherification

[0076] Put the alkali cellulose fibers in a stirring reaction pot, add monochloroacetic acid and absolute ethanol, then add cetyltrimethylammonium bromide, start the st...

Embodiment 3

[0089] Embodiment 3 A kind of preparation method of carboxymethyl cellulose fiber, comprises the following steps:

[0090] A method for preparing carboxymethyl cellulose fibers, comprising the steps of alkalization, etherification and post-treatment.

[0091] S1, alkalization

[0092] The viscose fiber is basified with sodium hydroxide in anhydrous ethanol and water to form alkali cellulose fiber.

[0093] The ratio of the absolute ethanol to water is 60:1.7; the ratio of the viscose fiber to the solvent is 13:60; the added amount of the sodium hydroxide is 18% of the viscose fiber.

[0094] The fineness of the viscose fiber is 6.6dtex, and the cut length is 76mm.

[0095] Preferably, the temperature of the alkalization reaction is 50° C., and the reaction time is 50 minutes.

[0096] S2, etherification

[0097] Put the alkali cellulose fibers in a stirring reaction pot, add monochloroacetic acid and absolute ethanol, then add cetyltrimethylammonium bromide, start the stir...

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Abstract

The invention provides a preparation method of carboxymethyl cellulose fibers. The preparation method comprises the steps of alkalization, etherification and post-treatment. Cellulose fiber is used as a raw material and is carried out in an organic solvent, so that the initial structure of the cellulose fiber can be reserved, and the structure and the form of the fiber are basically not influenced. Cetyltrimethylammonium bromide is added during etherification, so that the surface tension of the fiber is reduced, the hydrophilicity of the fiber is improved, and the reaction efficiency is improved; meanwhile, hexadecyl trimethyl ammonium bromide is used as a brominating agent, free bromide ions in the system directly participate in the reaction during etherification, and the fibers are brominated to form a new grafted copolymer, so that the wettability and adsorbability of the fibers are improved, and the fibers can quickly adsorb exudate after being made into medical dressing, so that wounds are kept dry, and the breeding of bacteria is reduced. According to the invention, the stirring reaction pot is improved, so that the influence on the structure and form of the fiber caused by the problems of fiber hanging, winding, caking and the like during etherification is avoided.

Description

technical field [0001] The invention relates to the technical field of carboxymethyl cellulose, in particular to a method for preparing carboxymethyl cellulose fibers. Background technique [0002] Cellulose mainly exists in wood and plant fibers, wherein the cellulose content in wood is 40-50%, and the cellulose content in cotton is extremely high, reaching 95-99%. A lot of plants can be produced every year through photosynthesis on the earth, about 500 billion tons, and about 200 billion tons of these 500 billion tons can be used to prepare natural cellulose. [0003] Carboxymethyl cellulose is a cellulose ether derivative produced from natural cellulose with a degree of polymerization of 100-2000 through alkalinization with sodium hydroxide and etherification with chloroacetic acid. There are three alcoholic hydroxyl groups on the glucose unit of the cellulose molecule: one primary hydroxyl group and two secondary hydroxyl groups. These three alcoholic hydroxyl groups c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08B11/12B01J19/28
CPCC08B11/12B01J19/28B01J19/0053B01J19/0066
Inventor 陈连节
Owner 浙江隆腾新材料有限公司
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