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Method for preparing carrageenan fibers with alkaline dissolution process

A technology of carrageenan and carrageenan base, which is applied in spinning solution preparation, fiber treatment, wet spinning and other directions, can solve problems such as excessive temperature requirements and energy waste, reduce heating and heat preservation requirements, solve energy waste, and solve The effect of spinneret plugging

Active Publication Date: 2012-01-04
青岛源海新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The resulting problem is that carrageenan spinning requires too high temperature for spinning equipment, resulting in a lot of energy waste, and the high temperature coagulation bath is also a very severe test for operators.

Method used

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  • Method for preparing carrageenan fibers with alkaline dissolution process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Add 80 grams of carrageenan to 920 grams of 2 mol / L NaOH solution, fully stir and dissolve at room temperature to obtain a carrageenan solution with a content of 8% (mass percentage), filter, defoam and stand for 8 hours to make spinning Spinning solution, the spinning solution passes through the wet spinning machine, and at room temperature (20°C), spins at a spinning speed of 25m / min and enters the coagulation bath for coagulation and drawing. The coagulation bath is 15% barium chloride solution, and the coagulation bath temperature room temperature (20°C), the drafting ratio of the fiber is 10%, the fiber is washed and dried to obtain the fiber material (see figure 1 C), the flexibility, strength and gloss of the fiber are better than those of aqueous solution spinning. The single filament tensile test index is shown in Table 2, and the mechanical strength is 9.09cN / tex, which is more than twice the strength of aqueous solution spinning fiber.

Embodiment 2

[0030] Add 70 grams of carrageenan to 630 grams of 2 mol / L KOH solution, fully stir and dissolve at room temperature to obtain a carrageenan solution with a content of 10% (mass percentage), filter, defoam and stand for 6 hours to make spinning At room temperature (20°C), the spinning solution is spun through a wet spinning machine at a spinning speed of 15m / min and enters a coagulation bath for coagulation and drawing. The coagulation bath is 5% barium chloride solution, and the temperature of the coagulation bath is room temperature. (20°C), the draft ratio of the fiber is 30%, the fiber is washed and dried to obtain the fiber material. The mechanical strength of the obtained fiber is 9.5 cN / tex, which is also more than 2 times higher than that of the aqueous solution spun fiber.

Embodiment 3

[0032] Add 60 grams of carrageenan to 690 grams of 4mol / L ammonia solution, stir and dissolve at room temperature to obtain a carrageenan solution with a content of 8%, filter, defoam and stand for 6 hours to make a spinning solution. ), the spinning solution is spun into the coagulation bath by the wet spinning machine at a spinning speed of 10m / min for coagulation and drawing. The elongation ratio is 50%, and the fiber is washed and dried to obtain a fiber material. The mechanical strength of the obtained fiber is 8.92 cN / tex, which is also more than 2 times higher than that of the aqueous solution spun fiber.

[0033] Table 2 Tensile test index of different carrageenan fibers monofilament

[0034] Fiber Preparation Method Maximum elongation (%) Maximum strength (cN) Strength (cN / tex) Linear Density (tex) Aqueous solution spinning (comparative example 2) 10.79 17.42 4.3 4.08 Alkali solution spinning (embodiment 1) 5.54 9.67 9.09 1.06

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Abstract

The invention discloses a method for preparing carrageenan fibers with an alkaline dissolution process. The method comprises the following steps of: (1) adding carrageenan to aqueous alkali with the concentration of 2-8mol / L, and stirring and dissolving at room temperature to obtain carrageenan aqueous alkali with the mass percentage concentration of 3-10%; (2) filtering and defoaming the carrageenan aqueous alkali to obtain a spinning solution; (3) spinning the filtered and defoamed spinning solution into a coagulation bath at the room temperature and a spinning speed of 10-80m / min through awet spinning machine, coagulating and drawing to obtain insoluble carrageenan fibers, and washing, dehydrating and drying the carrageenan fibers to obtain fiber materials. According to the method forpreparing the carrageenan fibers with the alkaline dissolution process, the carrageenan is dissolved by the aqueous alkali, and all operations can be carried out at the room temperature, thus the requirements on temperature rise and heat insulation of the spinning device are largely reduced, and the problems of spinneret plate stoppage due to gelatinization and the fiber adhesion during post-treatment can be solved; and in addition, the flexibility and the glossiness of the obtained fibers are largely higher than the flexibility and the glossiness of the water-soluble spinning fibers.

Description

technical field [0001] The invention relates to a method for preparing natural fibers, in particular to a method for preparing carrageenan fibers, and belongs to the field of polymer materials. Background technique [0002] Seaweed fiber is currently a hot spot in green fiber research in the world. It is a fiber material prepared from natural seaweed polysaccharides. It is a renewable resource with biocompatibility and biodegradability. It is a good environment-friendly material. In recent years, domestic scholars have done a lot of research work on the preparation and application of seaweed fiber. Xia Yanzhi et al. prepared a new flame-retardant seaweed fiber material by adjusting the ratio of G segment and M segment in sodium alginate. It has the characteristics of flame retardancy, high breaking strength and biodegradability, and can be used to manufacture flame-retardant textiles by pure spinning or blending (CN101037814); Pan Yuejin and others invented a fabric made of ...

Claims

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Application Information

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IPC IPC(8): D01D1/02D01D1/10D01D5/06
Inventor 夏延致薛志欣纪全王霞
Owner 青岛源海新材料科技有限公司
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