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Method for preparing alginate/cellulose composite fibers

A composite fiber and alginate technology, which is applied in the direction of cellulose/protein conjugated artificial filament, fiber chemical characteristics, textiles and papermaking, etc., can solve the problem of poor spinnability, failure to achieve mixing effect, and fiber content Mechanical indicators, functional indicators and other issues to achieve the effect of improving compatibility and ensuring content

Active Publication Date: 2011-02-09
潍坊欣龙生物材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] (2) Judging from the filtration situation, a large amount of sodium alginate is filtered out by the filter cloth, which seriously affects the content of alginic acid in the finished fiber
[0009] (3) If it is produced by injection before spinning, when the sodium alginate colloid and viscose meet, because the pH value is much higher than 14, the gel phenomenon will occur instantaneously, which will not only fail to achieve the ideal mixing effect, but also cause spinnability. The performance becomes poor, and even the spinning cannot be continued, which causes great difficulties for industrial production.
[0010] In view of the above reasons, the production of alginate / cellulose composite fiber according to the above process is not only unstable in production process, but also the content of alginate in the finished alginate / cellulose composite fiber and the physical and mechanical indicators and functional indicators of the fiber are all low. will be affected

Method used

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  • Method for preparing alginate/cellulose composite fibers
  • Method for preparing alginate/cellulose composite fibers

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] (1) The cellulose cotton pulp is soaked and alkalized by 235g / l NaOH solution, the alkalization time is 0.45 hours, the hemicellulose content in the soaked alkali solution is not more than 3wt%, and crushed by pressing, aged at 25°C for 5 Obtained the alkali cellulose containing α-cellulose 27wt%, NaOH 14.5wt% in one hour.

[0031] (2) Sodium alginate was added into the alkali cellulose according to 3wt% of the alkali cellulose, and mixed and stirred for 50 minutes, and mixed evenly.

[0032] (3) In the above-mentioned mixture of alkali cellulose and sodium alginate, add relative α-cellulose and sodium alginate 34.5wt% CS 2 , carry out yellowing reaction 1.3 hours, generate cellulose xanthate and alginate xanthate, add deionized water to dissolve then, prepare to contain cellulose xanthate and alginate xanthate 6.8wt%, NaOH 5.8wt% cellulose / alginate xanthate viscose.

[0033] (4) The above cellulose / alginate xanthate viscose is filtered, defoamed, and matured to obtai...

Embodiment 2

[0037] (1) The cellulose bamboo pulp is soaked and alkalized by 245g / l NaOH solution, the alkalization time is 1.45 hours, the hemicellulose content in the soaked alkali solution is no more than 4wt%, and crushed by pressing, aged at 35°C for 4 hours to obtain alkali cellulose containing α-cellulose 29wt% and NaOH 17.5wt%.

[0038] (2) Add sodium alginate into the alkali cellulose according to 4wt% of the alkali cellulose, and mix and stir for 40 minutes, and mix well.

[0039] (3) In the above-mentioned mixture of alkali cellulose and sodium alginate, add relative α-cellulose and sodium alginate 37.5wt% CS 2 , carry out yellowing reaction 2 hours, generate cellulose xanthate and alginate xanthate, add deionized water to dissolve then, prepare to contain cellulose xanthate and alginate xanthate 7.2wt%, NaOH 5.9wt% cellulose / alginate xanthate viscose.

[0040] (4) The above-mentioned cellulose / alginate xanthate viscose is filtered, defoamed, and matured to obtain a falling ball...

Embodiment 3

[0044] (1) Alkaline the cellulose cotton pulp by soaking in 250g / l NaOH solution for 2 hours, the content of hemicellulose in the soaking lye should not exceed 3.5wt%, crush it by pressing, and age at 30°C After 5 hours, alkali cellulose containing α-cellulose 30wt% and NaOH 18wt% was obtained.

[0045] (2) Add sodium alginate into the alkali cellulose according to 3.5wt% of the alkali cellulose, and mix and stir for 55 minutes, and mix well.

[0046] (3) In the above-mentioned mixture of alkali cellulose and sodium alginate, add relative α-cellulose and sodium alginate 40wt% CS 2 , carry out the yellowing reaction for 2.5 hours to generate cellulose xanthate and alginate xanthate, then add deionized water to dissolve, and then add 1.5wt% CS relative to α-cellulose and sodium alginate 2 , carry out secondary yellowing reaction, and prepare cellulose / alginate xanthate viscose containing cellulose xanthate and alginate xanthate 7.5wt%, NaOH6.0wt%.

[0047] (4) The above cellul...

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Abstract

The invention discloses a method for preparing alginate / cellulose composite fibers, which comprises the following steps: (1) impregnating cellulose pulp with solution of NaOH for alkalization and obtaining alkaline cellulose; (2) adding sodium alginate in an amount which is 1 to 5 weight percent based on the weight of the cellulose into the alkaline cellulose, and mixing uniformly; (3) adding CS2 into the mixture to perform a sulfonation reaction, adding deionized water for dissolving the product of the sulfonation reaction, and obtaining cellulose / alginate xanthogenate viscose; (4) filtering, deforming and aging the cellulose / alginate xanthogenate viscose to obtain viscose spinning solution; and (5) performing wet spinning molding of the viscose spinning solution, solidifying and regenerating the molded product to obtain the alginate / cellulose composite fibers. The alginate / cellulose composite fibers prepared by the method are applicable in the field of health and medicine and can be used for making underwear.

Description

technical field [0001] The invention relates to the technical field of man-made cellulose fibers, in particular to a preparation method of alginate / cellulose composite fibers. Background technique [0002] Sodium alginate (Sodium alginate, SAL) is a sodium salt of a polyanionic polysaccharide (alginic acid) extracted from natural brown algae, which is composed of β-D mannonate and α-L guluconate (1-4 ) linked linear copolymers (see formula 1), because of its unique physical and chemical properties and good biocompatibility, it is widely used in pharmaceutical preparations, tissue engineering, clinical treatment, cell culture, food processing and other fields. In the field of pharmaceutical preparations, SAL is often used as a thickener, suspending agent and disintegrating agent, and can also be used as a cold-resistant protective agent for microencapsulated materials and cells. It also has the functions of lowering blood sugar, anti-oxidation, and enhancing immune activity....

Claims

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Application Information

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IPC IPC(8): D01F8/18D01F8/02
Inventor 逄奉建张志鸿曹其贵刘建华姜明亮王东秦翠梅于万永
Owner 潍坊欣龙生物材料有限公司
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