CN106283270B - A kind of aquogel type alginate fibre and preparation method thereof - Google Patents

Abstract

The present invention relates to a kind of aquogel type alginate fibres and preparation method thereof.Described method includes following steps：Use molecular weight for 300000~500000, the sodium alginate that M/G values are 1.5~2.5 is raw material, respectively with calcium chloride water for the first coagulating bath, the ethanol solution of sodium hydroxide is the second gelation, and absolute ethyl alcohol is washing bath, by controlling spinning technique step and parameter, it is 0.02~0.1 mg/g fibers to obtain calcium ion content, liquid absorption amount to distilled water is 10~20 g/g fibers, and line density is 1.0~1.5 dtex, and fracture strength is the aquogel type alginate fibre of 1.2~2.0 cN/dtex.The fracture strength and flexibility of aquogel type alginate fibre provided by the invention are excellent, can meet the requirement of the fibers Downstream processings such as needle thorn, braiding, cutting, can quickly form complete industrial chain on existing Industry Foundation, meet the consumption demand of people.

Description

A kind of hydrogel type seaweed fiber and preparation method thereof

technical field

The invention relates to a hydrogel type seaweed fiber and a preparation method thereof, belonging to the field of textile science and technology.

Background technique

Seaweed fiber is a new type of high-performance fiber obtained by wet spinning production process with polysaccharide extracted from natural seaweed as raw material and water-soluble metal salt solution as coagulation bath. The medical dressing made of seaweed fiber can absorb wound exudate, form a gel on the surface of the wound, accelerate wound hemostasis, block bacterial invasion, and promote wound healing; moreover, this layer of gel can prevent the gap between the wound and the fibers. The adhesion is very easy to remove, reducing the secondary injury of the wound; in addition, the biocompatibility of seaweed fiber is also very good, and long-term use will not cause adverse symptoms such as skin sensitivity or allergic reaction at the wound site. At present, seaweed fiber medical dressings have been widely used. Seaweed has accumulated rich minerals in the ocean, and contains carbohydrates, amino acids, fats and various vitamins, which can activate cell metabolism and have anti-inflammatory and anti-itching functions. Therefore, seaweed fiber has natural maintenance, It has moisturizing and beautifying effects, and also has special uses for skin disease treatment, and is very suitable for making hydrogel masks for beauty and skin care.

The Chinese patent publication number is CN1986921A, and the name of the invention is the preparation process of seaweed fiber gel spinning. The application discloses dissolving sodium alginate in an aqueous solution of sodium hydroxide, and adding a certain amount of hypochlorous acid and salt to prepare spinning Solution, with the solution containing water and lower alcohol as the first coagulation bath, and the aqueous solution containing lower alcohol, hydrogen chloride and calcium chloride as the second coagulation bath, the method for preparing seaweed fiber by gel spinning process, but due to the spinning method of this scheme Hypochlorous acid and salt are added in the solution, which will easily cause the spinneret to be blocked, and the mechanical properties of the prepared fiber are poor. The Chinese patent publication number is CN101033564A, and the title of the invention is the preparation method and application of ordinary and functional calcium alginate fibers. The calcium aqueous solution is a coagulation bath, and the method of preparing calcium alginate fibers by wet spinning is used, but the alginate fibers prepared by this scheme cannot be gelled in the case of water, which limits its use in the field of hydrogel facial masks. Applications. The Chinese patent publication number is CN104338173A, and the title of the invention is a production method and application of a quick-absorbing gelatinized seaweed hemostatic dressing. In the alcohol aqueous solution of metal salt, remove the remaining solution after a period of time, and complete the soaking treatment; then immerse in the solution mixed with alcohol and water, remove the remaining solution after a period of time, complete the rinsing treatment, and then dry, cut and pack 1. Disinfect the finished product, but the preparation method of the fast liquid-absorbing gelled seaweed hemostatic dressing prepared by this method is complicated, the preparation process time is longer, the cost is higher, and the gel effect is not very ideal.

The Chinese patent publication number is CN 103774281A, the publication date is May 7, 2014, and the title of the invention is a preparation process for health-care seaweed fiber spinning. The application discloses that sodium alginate is dissolved in sodium hydroxide and sodium hypochlorite. In the aqueous solution, the spinning screw is extruded into the coagulation bath, and then the preliminarily formed seaweed fiber is ion-exchanged and stretched to obtain the seaweed fiber. However, the alginic acid fiber prepared by this method cannot be gelled when it meets water, and cannot Used to make hydrogel masks.

At present, the seaweed fibers prepared by the technology disclosed in the literature cannot be gelled in distilled water, which limits the application of seaweed fibers in the field of hydrogel facial masks. Moreover, the seaweed fiber prepared by the technology disclosed in the literature has a long gelation time even in the wound exudate containing sodium ions, and it takes at least 30 minutes to complete the absorption of exudate or pus and blood and transform It is still difficult to meet the requirements for wound cleaning and nursing of acute massive bleeding or exudate.

Contents of the invention

In view of the above-mentioned problems, the object of the present invention is to provide a kind of seaweed fiber that can quickly gel in water, mainly by preparing sodium alginate into a spinning stock solution, and the spinning stock solution is extruded from the spinneret through a metering pump, After the first coagulation bath of calcium chloride, the primary fibers are obtained, and the primary fibers pass through the sodium hydroxide ethanol solution in the second bath, and the sodium ions exchange with the calcium ions in the primary fibers to adjust the content of calcium ions in the fibers and gradually form The hydrogel-type seaweed fiber is then stretched for the second time, washed in a washing bath, drawn for the third time, dried and wound to obtain the hydrogel-type seaweed fiber. The prepared hydrogel-type seaweed fiber can be used to make medical sanitary dressings and beauty skin care masks, and has excellent breaking strength and flexibility, simple production process, low-cost hydrogel-type seaweed fiber and its preparation method, in order to achieve the above purpose , its technical solution is:

A hydrogel-type seaweed fiber, the content of calcium ions in the hydrogel-type seaweed fiber is 0.02-0.1 mg/g fiber, the linear density is 1.0-1.5 dtex, the breaking strength is 1.2-2.0 cN/dtex, and the resistance to distilled water The liquid absorption is 10-20g/g fiber, and it will form a gel when it meets water.

A preparation method of hydrogel type seaweed fiber, the preparation method of hydrogel type seaweed fiber comprises the steps:

a Weigh sodium alginate according to 5% to 10% of the mass of distilled water, add it to distilled water and mechanically stir to dissolve it for 2 to 5 hours, then let it stand for 24 to 36 hours for defoaming, or vacuumize for 12 to 24 hours to obtain spinning dope, the molecular weight of the sodium alginate is 300000-500000, and the M/G value is 1.5-2.5.

The molecular structure of sodium alginate is composed of two structural units, mannuronic acid (referred to as M unit) and guluronic acid (referred to as G unit). The changes in the ratio and order of the two uronic acids in the molecule will cause algae The physical and chemical properties of sodium sulfate vary. Among them, the G unit can form a chelate structure with calcium ions, while the M unit has no effect on calcium ions. The present invention selects sodium alginate with an M/G value between 1.5 and 2.5 as a raw material to ensure rapid formation of seaweed fibers in a coagulation bath of calcium chloride aqueous solution, and at the same time control the content of calcium ions in the fibers within a suitable range, and to control the seaweed fibers from the source. The molecular structure of hydrogel-type seaweed fiber is designed.

b Weigh calcium chloride according to 1% to 5% of the mass of distilled water, and add it to distilled water with mechanical stirring to dissolve for 10 to 20 minutes to obtain the first coagulation bath.

c Weigh sodium hydroxide according to 5% to 20% of the mass of absolute ethanol, and add it to absolute ethanol with mechanical stirring to dissolve for 30 to 60 minutes to obtain the second coagulation bath.

The present invention adopts a two-step method to prepare hydrogel seaweed fiber. The first step is coagulation by using calcium chloride aqueous solution to ensure the formation of seaweed fiber. The ion exchange reaction occurs, the content of calcium ions in the fiber is adjusted, and the hydrogel-type seaweed fiber is gradually formed. At the same time, the solvent of the second coagulation bath is absolute ethanol, which can remove the water molecules contained in the nascent fibers through extraction, so that the formed hydrogel seaweed fibers can maintain the fiber shape, and ensure that the dried fibers are No sticking, no strands.

d Filtrate the spinning dope prepared in step a, then extrude from the spinneret after passing through the metering pump, and enter the first coagulation bath prepared in step b, the first coagulation temperature is 40-60 ° C, and the coagulation time is 1 ~2 min to obtain primary fibers, and the hole diameter of the spinneret is 0.03-0.05 mm.

By reducing the content of calcium ions in the fibers, hydrogel-type seaweed fibers can be obtained, but too low a content of calcium ions will lead to a decrease in the mechanical properties of the fibers, which will bring difficulties to downstream processing such as needle punching, weaving, and slitting of the fibers. The present invention reduces the diameter of the formed fiber by selecting a spinneret with a hole diameter of 0.03-0.05 mm, which is beneficial to the full coagulation of the fiber, and by controlling the temperature of the coagulation bath and the coagulation time of the fiber, it is ensured that the fiber can be fully coagulated while being fully coagulated. Effective drafting forms a highly oriented fiber supramolecular structure, thereby obtaining a high-strength hydrogel-type seaweed fiber matrix.

e introduce the as-spun fiber obtained in step d into the second coagulation bath prepared in step c after the first drawing, the drafting ratio of the first drawing is 2 to 4 times, and the second coagulation temperature is 40 to 60 ℃, the coagulation time is 1 to 3 min, and then stretched for the second time, washed in a washing bath, drawn for the third time, dried and coiled to obtain hydrogel-type seaweed fibers, the second time of the fibers The drafting ratio of drafting is 1.0～1.5 times, and the drafting ratio of the third drafting is 1.0～2.0 times, and the washing bath of described fiber is dehydrated alcohol, and washing time is 3～5 min, and described The drying temperature of the fiber is 60-80 ℃, and the drying time is 3-5 minutes.

Since the spinning solution of seaweed fiber contains a large amount of water molecules, the hydrogel type seaweed fiber will gel when it encounters water molecules, so the dried hydrogel type seaweed fiber is very prone to adhesion between fibers, resulting in It feels hard and affects the subsequent processing of fibers. The preparation method of the hydrogel-type seaweed fiber of the present invention uses absolute ethanol to wash the formed hydrogel seaweed fiber before the fiber is dried, and removes the water molecules contained in the fiber by extraction while washing, and passes through Controlling the drying temperature and drying time prevents the adhesion and hardening of the hydrogel-type seaweed fiber, so as to ensure the smooth progress of the subsequent processing of the fiber.

Owing to adopting above-mentioned technical scheme, the beneficial technical effect of a kind of hydrogel type seaweed fiber of the present invention and preparation method thereof is:

1. The preparation method of the hydrogel-type seaweed fiber of the present invention is to adjust the metal ion content in the molecular structure of the seaweed fiber through the structure control of the raw material and the design of the coagulation bath composition, and obtain the hydrogel-type seaweed fiber. The preparation method of the invention is simple, the process flow is short, and the production cost is low, the application field of the seaweed fiber is expanded, and the general application of the seaweed fiber in the fields of medical and sanitary dressings and cosmetic and skin care masks is realized.

2. The preparation method of the hydrogel-type seaweed fiber of the present invention uses absolute ethanol to wash the formed hydrogel seaweed fiber, removes the water molecules contained in the fiber by extraction while washing, and controls the drying temperature and The drying time prevents the adhesion and hardening of the hydrogel-type seaweed fiber, and does not affect the subsequent processing of the fiber.

3. The preparation method of the hydrogel type seaweed fiber of the present invention, while reducing the content of metal ions in the molecular structure of the seaweed fiber, through the control of the spinneret aperture, coagulation temperature, coagulation time and drafting ratio, etc., the hydraulic coagulation rate is improved. The strength and flexibility of glued seaweed fiber can meet the requirements of downstream processing of fibers such as needle punching, weaving and slitting, and can quickly form a complete industrial chain on the basis of the existing industry.

Detailed ways

Below in conjunction with specific embodiment the preparation method of hydrogel type seaweed fiber of the present invention is described in further detail:

Example 1

Weigh 100 grams of distilled water and 5 grams of sodium alginate with a molecular weight of 300,000 and an M/G value of 1.5 in sequence, add the weighed sodium alginate to the distilled water while stirring, mechanically stir for 2 h, and then let it stand for degassing for 24 hours. h, to obtain the spinning stock solution; successively weigh 5000 grams of distilled water and 50 grams of calcium chloride, add the weighed calcium chloride to the distilled water while stirring, and mechanically stir and dissolve for 10 min to obtain the first coagulation bath; 5000 grams of absolute ethanol and 250 grams of sodium hydroxide, add the weighed sodium hydroxide to absolute ethanol while stirring, mechanically stir and dissolve for 30 min to obtain the second coagulation bath; filter the spinning stock solution, and then measure After the pump, it is extruded from the spinneret with a hole diameter of 0.03 mm, and enters the first coagulation bath with a coagulation temperature of 40 °C and a coagulation time of 2 min to obtain primary fibers; the primary fibers are drawn twice and then introduced into In the second coagulation bath, the coagulation temperature is 40 °C, and the coagulation time is 3 min. After the second drawing of 1.5 times, it is introduced into an anhydrous ethanol bath for washing. The washing time is 3 min, and then it is drawn 2.0 times three times. After drying in a drying oven at 60°C for 5 minutes, winding and winding, the obtained fiber has a calcium ion content of 0.02 mg/g, a linear density of 1.0 dtex, a breaking strength of 1.2 cN/dtex, and a liquid absorption of distilled water of Hydrogel-type seaweed fiber with 20 g/g fiber.

Example 2

Weigh 100 grams of distilled water and 10 grams of sodium alginate with a molecular weight of 500,000 and an M/G value of 2.5 in sequence, add the weighed sodium alginate to the distilled water while stirring, mechanically stir for 5 h, and then let it stand for degassing for 36 hours. h, to obtain the spinning stock solution; successively weigh 5000 grams of distilled water and 250 grams of calcium chloride, add the weighed calcium chloride to the distilled water while stirring, and mechanically stir and dissolve for 20 min to obtain the first coagulation bath; 5000 grams of absolute ethanol and 1000 grams of sodium hydroxide, while stirring, add the weighed sodium hydroxide to absolute ethanol, mechanically stir and dissolve for 60 min to obtain the second coagulation bath; filter the spinning stock solution, and then measure After the pump, it was extruded from the spinneret with a hole diameter of 0.05 mm, and entered into the first coagulation bath with a coagulation temperature of 60 °C and a coagulation time of 1 min to obtain primary fibers; the primary fibers were drawn 4 times, and then introduced into the second In the coagulation bath, the coagulation temperature is 60 °C, the coagulation time is 1 min, and then 1.0 times of second stretching is introduced into the absolute ethanol bath for washing for 5 min, and then 1.0 times of third drafting is carried out, at 80 °C After drying in a drying oven for 3 minutes, winding and winding, the obtained fiber has a calcium ion content of 0.1 mg/g, a linear density of 1.5 dtex, a breaking strength of 2.0 cN/dtex, and a liquid absorption of distilled water of 10 g/g Fibrous hydrogel-type seaweed fiber.

Example 3

Sequentially weigh 100 grams of distilled water and 8 grams of sodium alginate with a molecular weight of 400,000 and an M/G value of 2.0, add the weighed sodium alginate to the distilled water while stirring, mechanically stir for 4 hours, and then vacuumize and degas for 24 hours. h, to obtain the spinning stock solution; successively weigh 5000 grams of distilled water and 150 grams of calcium chloride, add the weighed calcium chloride to the distilled water while stirring, and mechanically stir and dissolve for 18 min to obtain the first coagulation bath; 5000 grams of absolute ethanol and 500 grams of sodium hydroxide, while stirring, add the weighed sodium hydroxide to absolute ethanol, mechanically stir and dissolve for 50 min to obtain the second coagulation bath; filter the spinning stock solution, and then measure After the pump, it was extruded from the spinneret with a hole diameter of 0.04 mm, and entered the first coagulation bath, the coagulation temperature was 50 °C, and the coagulation time was 1.5 min to obtain primary fibers; the primary fibers were drawn 3 times, and then introduced into the second In the coagulation bath, the coagulation temperature is 50 °C, the coagulation time is 1.5 min, and then 1.2 times of secondary drawing is carried out, and then it is introduced into an anhydrous ethanol bath for 4 min. After drying in a drying oven for 4 minutes, the fibers were wound and the fibers were obtained with a calcium ion content of 0.08 mg/g, a linear density of 1.3 dtex, a breaking strength of 1.8 cN/dtex, and a liquid absorption of 12 g/g/dtex for distilled water. A hydrogel-type seaweed fiber of g-fiber.

Example 4

Weigh 100 grams of distilled water and 6 grams of sodium alginate with a molecular weight of 400,000 and an M/G value of 1.8 in sequence, add the weighed sodium alginate to the distilled water while stirring, mechanically stir for 3 h, and then vacuumize and degas for 12 hours. h, to obtain the spinning stock solution; successively weigh 5000 grams of distilled water and 100 grams of calcium chloride, add the weighed calcium chloride to the distilled water while stirring, and mechanically stir and dissolve for 15 min to obtain the first coagulation bath; 5000 grams of absolute ethanol and 400 grams of sodium hydroxide, add the weighed sodium hydroxide to absolute ethanol while stirring, mechanically stir and dissolve for 40 min to obtain the second coagulation bath; filter the spinning stock solution, and then measure After the pump, it was extruded from a spinneret with a hole diameter of 0.03 mm and entered into the first coagulation bath with a coagulation temperature of 45 °C and a coagulation time of 1.5 min to obtain primary fibers; the primary fibers were drawn 2.5 times, and then introduced into the second In the coagulation bath, the coagulation temperature was 45 °C, and the coagulation time was 2.5 min. After a second stretching of 1.3 times, it was introduced into an anhydrous ethanol bath for 4 min. After drying in a drying oven for 5 min, winding and winding, the obtained fiber has a calcium ion content of 0.06 mg/g, a linear density of 1.2 dtex, a breaking strength of 1.6 cN/dtex, and a liquid absorption of distilled water of 16 g/g. A hydrogel-type seaweed fiber of g-fiber.

Example 5

Sequentially weigh 100 grams of distilled water and 7 grams of sodium alginate with a molecular weight of 300,000 and an M/G value of 2.0, add the weighed sodium alginate to the distilled water while stirring, mechanically stir for 3 h, and then vacuumize and degas for 20 h, to obtain the spinning stock solution; successively weigh 5000 grams of distilled water and 150 grams of calcium chloride, add the weighed calcium chloride to the distilled water while stirring, and mechanically stir and dissolve for 15 min to obtain the first coagulation bath; 5000 grams of absolute ethanol and 300 grams of sodium hydroxide, add the weighed sodium hydroxide to absolute ethanol while stirring, mechanically stir and dissolve for 40 minutes to obtain the second coagulation bath; filter the spinning stock solution, and then measure After the pump, it was extruded from a spinneret with a hole diameter of 0.05 mm, and entered into the first coagulation bath with a coagulation temperature of 50 °C and a coagulation time of 1 min to obtain primary fibers; the primary fibers were drawn 3 times, and then introduced into the second In the coagulation bath, the coagulation temperature is 50 °C, the coagulation time is 2 min, and then 1.2 times of secondary drawing is carried out, and then introduced into an anhydrous ethanol bath for washing for 5 min, and then 1.5 times of third drawing, at 75 °C After drying in a drying oven for 4 minutes, the fiber is wound and taken up to obtain a fiber with a calcium ion content of 0.05 mg/g, a linear density of 1.3 dtex, a breaking strength of 1.5 cN/dtex, and a liquid absorption of distilled water of 18 g/g. A hydrogel-type seaweed fiber of g-fiber.

Example 6

Sequentially weigh 100 grams of distilled water and 9 grams of sodium alginate with a molecular weight of 450,000 and an M/G value of 2.5, add the weighed sodium alginate to the distilled water while stirring, mechanically stir for 4 h, and then let stand for degassing for 20 h, to obtain the spinning stock solution; successively weigh 5000 grams of distilled water and 200 grams of calcium chloride, add the weighed calcium chloride to the distilled water while stirring, and mechanically stir and dissolve for 20 min to obtain the first coagulation bath; 5000 grams of absolute ethanol and 500 grams of sodium hydroxide, while stirring, add the weighed sodium hydroxide to absolute ethanol, mechanically stir and dissolve for 50 min to obtain the second coagulation bath; filter the spinning stock solution, and then measure After the pump, it was extruded from a spinneret with a hole diameter of 0.05 mm, and entered into the first coagulation bath with a coagulation temperature of 50 °C and a coagulation time of 1 min to obtain primary fibers; the primary fibers were drawn 3 times, and then introduced into the second In the coagulation bath, the coagulation temperature was 50 °C, and the coagulation time was 2 min. After a 1.1-fold secondary drawing, it was introduced into an anhydrous ethanol bath for 4 min, and then a 1.3-fold third drawing was performed. After drying in a drying oven for 4 minutes, winding and winding, the obtained fiber has a calcium ion content of 0.03 mg/g, a linear density of 1.4 dtex, a breaking strength of 1.3 cN/dtex, and a liquid absorption of distilled water of 19 g/g Fibrous hydrogel-type seaweed fiber.

The linear density and breaking strength of the hydrogel type seaweed fiber obtained in Examples 1, 2, 3, 4, 5, and 6, the calcium ion content in the fiber, and the liquid absorption of distilled water are shown in Table 1. The test methods for each performance are as follows:

Determination of calcium ion content: Weigh 0.2 g seaweed fiber sample in a crucible, place it in a muffle furnace, conduct carbonization treatment at 800 °C for 3 h, cool to room temperature, add 2 mL HNO ₃ , and heat slightly to dissolve it. Then the volume was constant in a 50 mL volumetric flask, and the content of calcium ions on the seaweed fiber was measured by atomic absorption spectrometer.

Determination of liquid absorption: Weigh 0.1 g of seaweed fiber sample, soak it in 50 mL of distilled water for 30 min; centrifuge and dehydrate the fiber after water absorption for 15 min, the speed of the centrifuge is 2000 r/min, weigh, and record the mass. is M ₁ ; then put the fiber in an oven at 105°C and dry it to constant weight, weigh it, and record the mass as M ₂ . The liquid absorption of fiber N=(M ₁ -M ₂ )/M ₂ .

Refer to "GB/T 14335-2008 Chemical Fiber - Staple Fiber Linear Density Test Method" to test the linear density of the fiber, and refer to "GB/T 14337-2008 Chemical Fiber - Short Fiber Tensile Properties Test Method" to test the breaking strength of the fiber.

Table 1 Properties of hydrogel-type seaweed fiber

Claims (8)

1. a kind of aquogel type alginate fibre, it is characterised in that：In aquogel type alginate fibre the content of calcium ion be 0.02~ 0.1mg/g fibers, line density are 1.0~1.5dtex, and fracture strength is 1.2~2.0cN/dtex, and the liquid absorption amount to distilled water is 10~20g/g fibers meet water and form gelinite, and the preparation method of the aquogel type alginate fibre includes the following steps：A is pressed Sodium alginate is weighed according to the 5%~10% of distillation water quality, and is added to mechanical agitation in distilled water and dissolves 2~5h, so 24~36h of standing and defoaming or vacuumizing and defoaming 12~for 24 hours afterwards, obtain spinning solution；

B 1%~5% weighs calcium chloride according to distillation water quality, and be added to mechanical agitation dissolving 10 in distilled water~ 20min obtains the first coagulating bath；

C weighs sodium hydroxide according to the 5%~20% of absolute ethyl alcohol quality, and it is molten to be added to mechanical agitation in absolute ethyl alcohol 30~60min is solved, the second gelation is obtained；

D filters spinning solution made from step a, then is squeezed out from spinneret after metering pump, and it is solidifying to enter step made from b first Gu in bath, the first setting temperature is 40~60 DEG C, and setting time is 1~2min, obtains as-spun fibre；

The as-spun fibre that step d is obtained is introduced into after first time drawing-off in the second gelation made from step c by e, then through second Washing, third time drawing-off, drying and winding, obtain aquogel type alginate fibre in secondary drawing-off, washing bath.

2. a kind of preparation method of aquogel type alginate fibre as described in claim 1, it is characterised in that：Aquogel type seaweed The preparation method of fiber includes the following steps：

A weighs sodium alginate according to the 5%~10% of distillation water quality, and is added to mechanical agitation dissolving 2 in distilled water ~5h is then allowed to stand 24~36h of deaeration or vacuumizing and defoaming 12~for 24 hours, obtains spinning solution；

B 1%~5% weighs calcium chloride according to distillation water quality, and be added to mechanical agitation dissolving 10 in distilled water~ 20min obtains the first coagulating bath；

C weighs sodium hydroxide according to the 5%~20% of absolute ethyl alcohol quality, and it is molten to be added to mechanical agitation in absolute ethyl alcohol 30~60min is solved, the second gelation is obtained；

D filters spinning solution made from step a, then is squeezed out from spinneret after metering pump, and it is solidifying to enter step made from b first Gu in bath, the first setting temperature is 40~60 DEG C, and setting time is 1~2min, obtains as-spun fibre；

The as-spun fibre that step d is obtained is introduced into after first time drawing-off in the second gelation made from step c by e, then through second Washing, third time drawing-off, drying and winding, obtain aquogel type alginate fibre in secondary drawing-off, washing bath.

3. a kind of preparation method of aquogel type alginate fibre as claimed in claim 2, the molecular weight of the sodium alginate It is 1.5~2.5 for 300000~500000, M/G values.

4. a kind of preparation method of aquogel type alginate fibre as claimed in claim 2, the aperture of the spinneret is 0.03~0.05mm.

5. a kind of preparation method of aquogel type alginate fibre as claimed in claim 2, the second of the as-spun fibre is solidifying Solid temperature be 40~60 DEG C, setting time be 1~3min.

6. the washing bath of a kind of preparation method of aquogel type alginate fibre as claimed in claim 2, the fiber is nothing Water-ethanol, wash time are 3~5min.

7. a kind of preparation method of aquogel type alginate fibre as claimed in claim 2, the first time drawing-off of the fiber Drafting multiple be 2.0~4.0 times, the drafting multiple of second of drawing-off is 1.0~1.5 times, the drafting multiple of third time drawing-off It is 1.0~2.0 times.

8. a kind of preparation method of aquogel type alginate fibre as claimed in claim 2, the drying temperature of the fiber are 60~80 DEG C, drying time is 3~5min.