Dry-wet spinning process for agar fiber

A dry-wet spinning and agarose technology, which is applied in the field of fiber spinning, can solve the problems of low fiber mechanical strength, high workshop requirements, and difficult industrialization, so as to enhance mechanical strength, avoid safety hazards, and protect the environment. The effect of little pollution

Active Publication Date: 2015-01-28
QINGDAO UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The above-mentioned wet spinning is to prepare the spinning solution from the high polymer, and then spray the spinning solution directly into the coagulation bath through the spinneret to solidify into filaments. During coagulation, cavities are often generated, resulting in low mechanical strength of the f

Method used

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  • Dry-wet spinning process for agar fiber
  • Dry-wet spinning process for agar fiber
  • Dry-wet spinning process for agar fiber

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0027] Example 1: Dry and wet spinning

[0028] Add 120 grams of agar to 1080 grams of DMSO, stir and dissolve at 80°C to obtain a 10% (mass percentage) agar solution, filter, defoam and let stand for 8 hours to make a spinning solution. Filter the above After defoaming, the spinning solution is gelatinized by the air layer (the length of the air layer is 5mm) through the dry-wet spinning machine; the gelatinized trickle enters the coagulation bath for coagulation and drawing, the coagulation bath is water, and the coagulation bath temperature It is at room temperature and the stretching ratio of the fiber is 1.1. The fiber is soaked in an oil agent (silicone oil content of 0.1% (v / v)) for 4 hours, washed, dehydrated with ethanol, and dried to obtain a fiber material. The scanning electron microscope picture is as image 3 , 4 As shown in the figure, it can be seen that the fibers of dry and wet spinning are thinner and the inside of the fibers is denser.

Example Embodiment

[0029] Example 2: Dry and wet spinning

[0030] Add 60 grams of agar in 440 grams of DMF, fully stir and dissolve at 80°C to obtain a 12% (mass percentage) agar solution, filter, defoam and let stand for 6 hours to make a spinning solution. After filtering and defoaming, the spinning solution is gelatinized by the air layer (the length of the air layer is 10mm) through the dry-wet spinning machine; the gelatinized trickle enters the coagulation bath for coagulation and drawing. The coagulation bath is water, and the coagulation bath The temperature is 30°C, the draft ratio of the fiber is 1.2, and the fiber is soaked in an oil agent (0.1% (v / v) of amino silicone oil) for 4 hours, washed, dehydrated with ethanol, washed, and dried to obtain a fiber material.

Example Embodiment

[0031] Example 3: Dry and wet spinning

[0032] Add 70 grams of agar to 430 grams of DMSO, stir and dissolve at 80°C to obtain a 14% agar solution, filter, deaerate and let stand for 6 hours to make spinning solution. The spinning solution is gelatinized through the air layer (air layer length 12mm) through the wet-dry spinning machine; the gelatinized trickle enters the coagulation bath for coagulation and drawing. The coagulation bath is water, and the coagulation bath temperature is 10°C. The draft ratio of the fiber is 1.2, and the fiber is soaked in an oil agent (0.05% (v / v) of dimethyl silicone oil) for 10 hours, washed, dehydrated with ethanol, washed, and dried to obtain a fiber material.

[0033] The mechanical properties of the agar fibers obtained in Comparative Example 1, Examples 1, 2, and 3 were tested. The results showed that the dry fracture strength of the agar fibers reached 1.6 cN / dtex and 2.5 cN / dtex, 2.8 cN / dtex, 3.1 cN / dtex. It can be seen that with the sa...

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Abstract

The invention discloses a dry-wet spinning process for agar fiber. The dry-wet spinning process for agar fiber is characterized by comprising the following steps: (1), adding agar into a DMSO or DMF solvent, and stirring at a temperature of 50 to 90 DEG C, so as to obtain an agar solution with the concentration of 10-18 wt percent; filtering and defoaming the solution so as to obtain an agar spinning solution; (2), conveying the prepared agar spinning solution into a spinning box and spraying out the agar spinning solution from the spinneret holes of a spinneret; gelating the liquid sprayed out through an air layer; enabling gelified liquid tricklet to enter into a precipitating bath to form embryo fibre, and then stretching the embryo fibre; soaking, washing, dewatering and airing the embryo fibre through an oiling agent so as to obtain a final fiber material. The dry-wet spinning process provided by the invention has the advantages as follows: due to the adoption of dry-wet spinning, the mechanical strength of the fiber is enhanced. Water is adopted as the precipitating bath, potential safety hazards caused by ethyl alcohol volatilization can be avoided, the solvent can be recovered through underpressure distillation, three wastes cannot be produced during the entire production process, and the dry-wet spinning process for agar fiber is suitable for large scale industrial production.

Description

technical field [0001] The invention relates to a fiber spinning method, in particular to a dry-wet spinning process of agar fiber. Background technique [0002] At present, human society is facing the double huge pressure of energy and environment, and the active development and utilization of natural products has become an important way to alleviate this pressure. [0003] The ocean has a vast area, accounting for about 70% of the earth's surface area, and contains rich biological resources, among which seaweed resources have huge biomass. my country's seaweed cultivation has a history of more than 60 years, and its output accounts for more than 70% of the world. Algae cultivation has created significant economic, social and ecological benefits. [0004] Agar gum is the main economic component of marine red algae. As a kind of seaweed gel product with a wide range of applications, it is widely used in food, medicine, health care, cosmetics, printing and dyeing and other f...

Claims

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Application Information

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IPC IPC(8): D01F9/04D01D5/06D01D5/04D01D5/12
Inventor 薛志欣夏延致纪全全凤玉耿存珍
Owner QINGDAO UNIV
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