Method of using red algae extracting solution to directly prepare carrageenan fiber

A technology for extracting liquid and carrageenan, which is applied in the chemical characteristics of fibers, wet spinning, rayon manufacturing, etc., can solve the problems of complex process and high consumption, and achieve the effect of simple process, low energy consumption and lower product price.

Active Publication Date: 2018-05-18
QINGDAO UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This process requires precipitation, drying, and redissolution. The process is complex and consumes too much water, ethanol, and energy.

Method used

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  • Method of using red algae extracting solution to directly prepare carrageenan fiber
  • Method of using red algae extracting solution to directly prepare carrageenan fiber

Examples

Experimental program
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Effect test

Embodiment 1

[0028] Take 100g of cleaned fresh carrageenan, cut it into small pieces of about 1cm, add 1000ml of 6% NaOH solution, heat in a water bath and adjust the temperature to 70°C for 1h pretreatment. Take out the pretreated red algae, then add 200ml of 8% NaOH solution, heat in a water bath at 95°C for 2 hours, and filter the extracted solution containing impurities with two layers of 200-mesh gauze to obtain the extracted solution. Pour the extract into the spinning kettle, enter the spinneret after defoaming, and use 15% BaCl 2 The solution is used as a coagulation bath, and the carrageenan fiber is prepared by wet spinning. The as-spun fiber is stretched, washed with water, dehydrated with 95% ethanol, and finally the carrageenan fiber is dried in a ventilated place.

Embodiment 2

[0030] Take 70g of cleaned fresh sand vegetables, cut them into pieces, add 1000ml of 6% NaOH solution, heat in a water bath and adjust the temperature to 60°C for 2h pretreatment. Add 210ml of 10% NaOH to the pretreated red algae, heat and extract in a water bath at 90°C for 2.5h, and filter with two layers of 200-mesh gauze to obtain the extract. Pour the extract into the spinning kettle, enter the spinneret after defoaming, use 7% KCl solution as coagulation bath, 7% CaCl 2 The solution is used as a stretching bath, and the carrageenan fiber is prepared by wet spinning. The primary fiber is stretched, washed with water, dehydrated with 95% ethanol, and finally the carrageenan fiber is dried in a ventilated place.

Embodiment 3

[0032] Take 8.5g cleaned dry Eucheuma, cut into pieces, soak in 1000ml of deionized water for 24 hours, take it out and add 1000ml of 10% NaOH solution, heat in a water bath and adjust the temperature to 80°C for 0.5h, wash with water, add 300ml of deionized water , heating and extracting in a water bath at 85°C for 3 hours, adding 2.4g NaOH to the extract while it was hot, stirring evenly, filtering the extract containing impurities with two layers of 200-mesh gauze to obtain the extract. Pour the extract into the spinning kettle, enter the spinneret after defoaming, and use 10% CuCl 2 The solution is used as a coagulation bath, and the carrageenan fiber is prepared by wet spinning. The as-spun fiber is stretched, washed with water, dehydrated with 95% ethanol, and finally the carrageenan fiber is dried in a ventilated place.

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PUM

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Abstract

The invention discloses a method of using a red algae extracting solution to directly prepare carrageenan fiber. The method comprises the following steps that 1, fresh red algae is subjected to impurity removal, washed with water and cut into small pieces or dry seaweed is soaked in deionized water for more than 24 hours; 2, a 5-10wt% NaOH solution which is 10-20 times the mass of an algal body isadded into the treated red algae and heated to 50-80 DEG C for carrying out treatment for 0.5-2 hours; 3, the red algae after alkali pretreatment is taken out, 2-5 times of water is added into the red algae, the mixture is heated and extracted at 85-100 DEG C for 1-4 hours, and NaOH is added into the hot extract to make the concentration of the extract reach 5-15 wt%; 4, the above extract is filtered to obtain an extracting solution; 5, the extracting solution is poured into a spinning kettle, enters a spinning nozzle after being defoamed, and then is subjected to a 2-15% coagulation bath toprepare the carrageenan fiber by wet spinning; 6, the primary fiber is stretched, washed with water, dewatered with 95% ethanol and finally dried. The method has the advantages of a simple process, energy saving and consumption reduction, reduces the production process, and achieves the one-line production process of the carrageenan fiber from seaweed raw materials to the carrageenan fiber.

Description

technical field [0001] The invention relates to a method for preparing carrageenan fiber, in particular to a method for directly preparing carrageenan fiber from red algae extract. Background technique [0002] Carrageenan is a natural linear sulfated polysaccharide extracted from red algae. Carrageenan solution is in a gel state that cannot flow at room temperature. Therefore, traditionally, carrageenan is mainly used as a stabilizer, thickener and gelling agent. And other forms are widely used in food, cosmetics and medicine and other fields. [0003] In recent years, with the rapid rise of seaweed fiber, the linear molecule of carrageenan, which is similar in structure to sodium alginate, has also been excavated for its characteristics and application in fiber formation. However, due to the gel structure characteristics of the carrageenan solution, it needs to be transformed into a flowing solution state before solution spinning can be carried out. Xia Yanzhi et al. (CN...

Claims

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Application Information

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IPC IPC(8): D01F9/00D01F9/04D01F1/00D01D5/06C08B37/00
CPCC08B37/0042D01D5/06D01F1/00D01F9/00D01F9/04
Inventor 薛志欣夏延致
Owner QINGDAO UNIV
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