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Bacterial cellulose/sodium alginate composite fiber and preparation method thereof

A technology of bacterial cellulose and sodium alginate, applied in the direction of cellulose/protein conjugated artificial filaments, alginate artificial filaments, etc., can solve problems such as difficult to dissolve, limit bacterial cellulose processing and application fields, etc. Achieve high hygroscopicity, good physical and mechanical properties, and simple dissolution process

Active Publication Date: 2009-12-30
QINGDAO TIANYI GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, bacterial cellulose has a high degree of polymerization and crystallinity, and the strong intramolecular and intermolecular hydrogen bonds of macromolecules in the crystalline region make it difficult to dissolve, which limits the processing and application fields of bacterial cellulose

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] A preparation method of bacterial cellulose / sodium alginate composite fiber, the bacterial cellulose is placed in a vacuum oven, the drying temperature is 100°C, and the drying time is 1h to obtain dry bacterial cellulose; 950 grams of 1-allyl Base-3-methylimidazolium chloride salt ionic liquid or 1-n-butyl-3-methylimidazolium chloride salt ionic liquid was heated to 80 ° C in an oil bath, then 50 g of dry bacterial cellulose was added, and mechanically stirred for 3 h, To obtain a bacterial cellulose solution with a mass percent concentration of 5%; under the action of ultrasonic waves, gradually (slowly and continuously) add 12 grams of sodium alginate micro-nano powder to the bacterial cellulose solution to obtain bacterial cellulose and seaweed sodium alginate powder mixed solution; disperse the bacterial cellulose and sodium alginate powder mixed solution under the action of ultrasonic waves for 30 minutes to obtain primary bacterial cellulose and sodium alginate sp...

Embodiment 2

[0040]A preparation method of bacterial cellulose and sodium alginate composite fiber, the bacterial cellulose is dried in a vacuum oven at 90°C for 1.5h to obtain dry bacterial cellulose; 940 grams of imidazolyl chloride salt ionic liquid (1-allyl Base-3-methylimidazolium chloride salt ionic liquid or 1-n-butyl-3-methylimidazolium chloride salt ionic liquid) was heated to 90°C in an oil bath, then 60 grams of dry bacterial cellulose was added, and mechanically stirred for 4h , to obtain a bacterial cellulose solution with a mass percentage concentration of 6%; under the action of ultrasonic waves, gradually add 15 grams of sodium alginate micro-nano powder to the bacterial cellulose solution to obtain bacterial cellulose mixed with sodium alginate powder solution: disperse the mixed solution of bacterial cellulose and sodium alginate powder under the action of ultrasonic waves for 40 minutes to obtain the primary spinning solution of bacterial cellulose and sodium alginate, an...

Embodiment 3

[0042] A preparation method of bacterial cellulose and sodium alginate composite fiber, the bacterial cellulose is dried in a vacuum oven at 80°C for 2 hours to obtain dry bacterial cellulose; 920 grams of 1-n-butyl-3-methylimidazole The chloride salt ionic liquid was heated to 85°C in an oil bath, then 80 grams of dry bacterial cellulose was added, and mechanically stirred for 5 hours to obtain a bacterial cellulose solution with a concentration of 8% by mass; under the action of ultrasonic waves, gradually 15 grams of bacterial cellulose Sodium alginate micro-nano powder is added to the bacterial cellulose solution to obtain a mixed solution of bacterial cellulose and sodium alginate powder; the mixed solution of bacterial cellulose and sodium alginate powder is dispersed for 50 minutes under the action of ultrasonic waves to obtain primary bacteria Cellulose and sodium alginate spinning stock solution, and then degassing under reduced pressure for 24 hours to obtain evenly d...

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Abstract

The invention discloses a bacterial cellulose / sodium alginate composite fiber and a preparation method thereof. The bacterial cellulose and the sodium alginate composite fiber are obtained by adding sodium alginate micro-nano powder to a bacterial cellulose solution, uniformly dispersing the sodium alginate micro-nano powder by ultrasonic waves and carrying out wet spinning, wherein the content of the sodium alginate in the composite fiber reaches 5 percent to 20 percent, and the content of the bacterial cellulose in the composite fiber reaches 80 percent to 95 percent. The preparation method comprises the following steps: dissolving an appropriate amount of bacterial cellulose into imidazole chloride ionic liquid to obtain the bacterial cellulose solution with the concentration in the mass percent of 5 percent-10 percent; then adding, uniformly dispersing and deaerating a certain amount of sodium alginate micro-nano powder to obtain spinning dope; squeezing the spinning dope into a coagulation bath through a spinning nozzle and stretching and drying the mixture to the bacterial cellulose and the sodium alginate composite fiber. The bacterial cellulose / sodium alginate composite fiber has high hygroscopicity, excellent physical and mechanical properties and effects of diminishing inflammation, relieving itching, beautifying on human skin, and the like.

Description

technical field [0001] The invention relates to the technical field of composite fiber and its preparation, in particular to a composite fiber prepared from bacterial cellulose and sodium alginate as raw materials, and a preparation method of the composite fiber. Background technique [0002] Cellulose is the most abundant biopolymer on the earth. It is mainly distributed in plants such as trees, cotton, hemp, etc., and is the main component of plants. However, some microorganisms also have the ability to synthesize cellulose efficiently. In order to distinguish it from plant-derived cellulose, cellulose derived from microorganisms is called "bacterial cellulose" or "microbial cellulose". Bacterial cellulose was first discovered by British scientist Brown in 1986. When he cultivated Acetobacter under static conditions, he found that a white gel-like film was formed on the gas-liquid surface of the culture medium. Through chemical and physical analysis, it was determined that...

Claims

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Application Information

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IPC IPC(8): D01F8/02D01F9/04
Inventor 朱平张传杰徐琪王柳隋淑英
Owner QINGDAO TIANYI GROUP
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