CN114481614A - Seaweed polyester composite fiber and preparation method and application thereof - Google Patents

Abstract

The present disclosure relates to a preparation method and an application of seaweed polyester composite fiber, wherein the preparation method of the composite fiber comprises the steps of (1) pretreatment, wherein calcium-containing alkali liquor is used for pretreating polyester; adsorbing alginic acid fibers onto the fibers, wherein the treatment liquid can comprise chitosan; step (3) curing by using curing liquid containing calcium ions, wherein the curing liquid can also comprise a cross-linking agent, such as glutaraldehyde; and (4) performing water absorption drying by using an organic solvent, or performing drying by matching with thermal drying. The composite fiber prepared by the method has excellent mechanical property, moisture absorption property, antibacterial property and dyeability, and no additional adhesive and no formaldehyde release are generated when the fiber is compounded with seaweed. Meanwhile, the fiber can be used for preparing yarns and various fabrics by using the yarns.

Description

A kind of seaweed polyester composite fiber and its preparation method and application

technical field

The present disclosure belongs to the field of textile materials, and in particular relates to a seaweed/polyester composite fiber and a preparation method and application thereof.

Background technique

Traditional polyester fibers are prepared from chemical raw materials. Compared with natural fibers, the fibers have low cost and superior mechanical properties, but at the same time, the fibers are hygroscopic, comfortable, and environmentally friendly (non-naturally degradable), etc. Defects are also more prominent problems. Further, the excellent mechanical properties of polyester fiber make it have good weaving properties and excellent wear durability of the fabric, but its chemical structure is tight, and the dyeing conditions are relatively harsh. Generally, high temperature and high pressure dyeing is required. High consumption and pollution.

As a kind of fiber that has been industrialized in recent years, seaweed fiber is a kind of natural polysaccharide fiber from seaweed extract in the ocean. It is prepared by wet method. Seaweed fiber has excellent hygroscopic properties and excellent biocompatibility. It can be naturally degraded in the natural environment and will not cause environmental pollution. However, due to the lack of dye bases such as hydroxyl and carboxyl groups on the polymer, alginate fibers have very little adsorption of dyes, and the dyeing effect is poor. In addition, due to the natural structure of seaweed fibers, the fibers are brittle, although mechanical properties Good, but the overall mechanical properties are not excellent.

In the prior art, seaweed and polyester fibers have been compounded or blended to prepare composite fibers or fabric materials with excellent mechanical properties and excellent biocompatibility, such as the publication number: CN111118652A, the name of the invention is: a The invention discloses a seaweed polyester long fiber and a preparation method thereof, and discloses that the content of seaweed extract in the polyester long fiber is 0.1-3%. Preparation, preparation of polyester functional particles, kneading and spinning and forming steps, the seaweed polyester long fiber prepared by this method has greatly improved the extraction rate of fucoidan sulfate, the active ingredient in seaweed, and the polyester long fiber has good High hydrophilicity and hygroscopicity, the antibacterial rate of Staphylococcus aureus, Escherichia coli, Candida albicans and other bacteria that are easily infected by the human body reaches 95.0-97.5%. The dry breaking strength reaches 6.5cN/dtex-6.8cN/dtex, the wet breaking strength is 5.2-5.3cN/dtex, the elongation at break is 32-36%, and the comprehensive performance is excellent. However, in the overall analysis of this scheme, seaweed is firstly added to the polyester, and the content is small. In addition, the temperature of polyester melt spinning is relatively high, and alginic acid is extremely easy to decompose under high temperature conditions. Therefore, those skilled in the art It is difficult to believe that the prepared fibers will have the hygroscopic properties of seaweed, and for antibacterial properties, seaweed itself basically does not have antibacterial properties.

The publication number is CN109763191A, the name of the invention is a seaweed polyester fiber and its preparation method, and it is disclosed that the raw materials include: polyester chips, seaweed extracts, modifiers, regulators, the polyester chips, seaweed extracts The mass ratio of , modifier and regulator is 90-110: 3.3-5.7: 4.1-6.2: 3-5. The seaweed polyester fiber prepared by the disclosure is added with seaweed extract, so that the prepared seaweed polyester fiber has good moisture absorption and skin-friendly properties. However, in practice, alginic acid is carbonized at temperatures above 300°C, so this process is also difficult to achieve.

The announcement number is: CN104032572B, and the name of the invention is: a method for hydrophilic modification of polyester fiber with sodium alginate, which discloses the use of sodium hydroxide solution with a mass fraction of 3-10% for polyester fiber at 70-90 ° C. The mixture was stirred and pretreated in the reaction vessel for 1 hour, and the solid-liquid ratio was 1:50. After the reaction, the mixture was washed with water and dried. Prepare a sodium alginate solution with a mass fraction of 1-4%, let it stand for 1 hour at a temperature of 4 ° C, make the sodium alginate fully absorb water and expand, and then place it in a reaction vessel, add dried polyester fibers to the reaction vessel, Mechanical stirring was carried out at room temperature for 1h-2h. During the stirring process, calcium chloride solution with a mass fraction of 2% was added. After the reaction, rinsed with water and dried at 70°C for 1h. For this scheme, the treatment efficiency is low, the time is long, and during the reaction, the concentration of 1-4% sodium alginate is high, and the viscosity of the solution is high (paragraph 23 of the specification can also be seen The viscosity of sodium alginate at this concentration is high), in addition, when adding 2% calcium chloride curing agent, the curing rate of the reaction system is uncontrollable, and the obtained fibers have a hard hand and obvious stickiness, which cannot be used as textile fibers. continue to use.

It can be seen from the information disclosed in the prior art that we urgently need to prepare a method that can improve the properties of polyester fibers, especially the hygroscopicity and dyeability of polyester, and the fibers also have excellent mechanical properties of polyester fibers. performance. However, it is difficult to achieve the above requirements by directly adding alginic acid to polyester at present.

Based on the problems in the prior art that polyester fibers have poor hygroscopicity, non-degradability, and high difficulty in dyeing, the present disclosure aims to prepare a novel composite fiber to overcome the above problems of polyester fibers.

SUMMARY OF THE INVENTION

The present disclosure aims to provide a seaweed/polyester composite fiber and a preparation method and application thereof. The provided preparation method can smoothly attach the seaweed component to the surface layer of the polyester fiber, with strong adhesion fastness, simple preparation method and excellent fiber hand feeling. , and the fiber also has excellent dyeing properties.

Specifically, the concept of the present disclosure is to provide a seaweed/polyester composite fiber and a preparation method thereof, which specifically includes firstly performing surface etching on polyester under high temperature conditions to improve the surface roughness of the polyester, so as to provide more water for the adhesion of seaweed. anchor point.

The concept of the present disclosure also lies in that, when preparing the seaweed/polyester composite fiber, the polyester fiber is treated with an alkaline solution, and the alkaline solution at least includes calcium ions. Remaining in the polyester surface layer provides conditions for the subsequent stable fixation of alginic acid.

The concept of the present disclosure also lies in that, when preparing the seaweed/polyester composite fiber, when the polyester fiber is surface-treated with lye, a softener is also added, and the softener is a cationic softener, and the cationic softener has a high temperature Under certain conditions, it can penetrate deep into the polyester and form a fixation, which is beneficial to the subsequent adsorption of seaweed components.

The concept of the present disclosure is also that, when preparing the seaweed/polyester composite fiber, the treatment of the polyester is carried out under a high temperature condition, and the treatment temperature is greater than 115° C. Under the high temperature condition, the polyester fiber can undergo a certain degree of degradation. Swelling is conducive to the fixation of cations and other substances, and is conducive to the subsequent adsorption and fixation of seaweed components.

The concept of the present disclosure is also that when the algae/polyester composite fiber is prepared, the concentration of alginic acid is less than 1% to ensure that the viscosity of the alginic acid solution is small. Adsorption will not be the existence of sticking phenomenon.

The concept of the present disclosure also lies in that, when preparing the seaweed/polyester composite fiber, after the polyester absorbs the alginic acid, subsequent curing is required, and a calcium ion-containing liquid is used for curing during the curing.

The concept of the present disclosure also lies in that, when preparing the seaweed/polyester composite fiber, during the curing process, the medium of the curing liquid is a mixed medium, so as to ensure the sufficiency of curing.

The concept of the present disclosure is also that when preparing seaweed/polyester composite fibers, in the drying process after curing, the desiccant is an organic solvent, and drying the treated composite fibers with an organic solvent can increase the alginic acid Fastness between polyester and polyester, while improving the feel of composite fibers.

The concept of the present disclosure is also that when preparing the seaweed/polyester composite fiber, a certain amount of water-soluble chitosan is also added to the alginic acid solution, and the addition of water-soluble chitosan can improve the dyeing performance of the composite fiber.

The concept of the present disclosure is also that the prepared seaweed/polyester composite fibers can be used to prepare textiles, including but not limited to yarns, woven fabrics, knitted fabrics, and non-woven fabrics, and can also be used to prepare filter materials and functional additive materials.

Specifically, the present disclosure provides a preparation method of seaweed/polyester composite fiber, which is characterized by comprising the following steps:

Step (1) Surface Treatment of Polyester Fiber

A pretreatment solution is prepared, and the pretreatment solution is an alkaline solution.

The alkaline liquid includes calcium ions;

Said alkaline solution can also include sodium ion, potassium ion;

Described alkaline solution includes hydroxide ion, chloride ion;

Further, the alkaline solution includes calcium hydroxide and/or calcium chloride;

Further, the alkaline solution includes one or more of sodium hydroxide, strong potassium oxide, sodium chloride, and potassium chloride.

Specifically, in some embodiments, calcium hydroxide solution is used as the lye of the pretreatment solution;

In some embodiments, calcium hydroxide and sodium hydroxide and/or potassium hydroxide are used to prepare an alkaline solution as the lye of the pretreatment solution.

In some embodiments, calcium hydroxide and sodium chloride and/or potassium chloride are used to prepare an alkaline solution as the lye of the pretreatment solution.

In some embodiments, calcium chloride and sodium hydroxide and/or potassium chloride are used to prepare an alkaline solution as the lye of the pretreatment solution.

Further, the pH value of the alkali solution of the pretreatment solution is 8-11.

Further, in the alkaline solution, the concentration of the calcium hydroxide is less than 0.15%.

Further, in the lye, the concentration of the calcium hydroxide is less than 0.022mol/L.

The purpose of the present disclosure is to introduce calcium ions in the pretreatment, but under alkaline conditions, calcium hydroxide is in a slightly soluble state. Therefore, it is necessary to ensure that the concentration of the sodium hydroxide component in the lye solution is less than 0.15%, that is, less than 0.022% mol/L, under this condition, calcium hydroxide will not precipitate and directly adhere to the surface of the fiber as a solid, which improves the softness and feel of the fiber.

Specifically, the temperature of the pretreatment is higher than 115°C, preferably higher than 120°C, and preferably 130°C.

The time of pretreatment is more than 15min, preferably more than 20min, more preferably more than 30min, and the time of pretreatment is less than 60min, preferably less than 40min.

In the present disclosure, under the condition of high temperature, the medium dissolves more in the alkaline solution, and the polyester swells, and these mediums penetrate into the polyester fiber, which is beneficial to the subsequent treatment. At the same time, under high temperature conditions, the lye can promote the hydrolysis of polyester, and the surface layer of polyester fiber forms a rough structure, which provides more anchor points for the subsequent fixation of seaweed.

Further, in the alkali solution of the pretreatment liquid, a softener is also added, and the softener is a cationic softener.

The cationic softener is one or more of tertiary amine salts, quaternary ammonium salts, and alkyl imidazole derivative quaternary ammonium salts.

Specifically, the cationic softener

The dosage of the cationic softener is 0.5-2%.

Polyester fibers have negative charges in water, and cationic softeners are easily adsorbed on the surface of the fibers, with strong binding ability, high temperature resistance and washing resistance, and the fabrics are plump and smooth after finishing. In addition, the addition of cationic softeners enables the fibers to With a certain positive charge, it is conducive to the adsorption of alginic acid to the fiber in the subsequent treatment, and the cation is more conducive to improving the binding fastness of alginic acid and the fiber.

Furthermore, after the high temperature pretreatment, the polyester fiber is washed and dried to remove the polyester residue hydrolyzed on the surface of the fiber, which is convenient for the subsequent adsorption and fixation of seaweed.

The preparation method of a seaweed/polyester composite fiber of the present disclosure further comprises the following steps:

The preparation of step (2) seaweed solution and the treatment of polyester

Take the sodium alginate solution and dissolve it in the aqueous solution.

The concentration of the alginic acid solution is less than 1%, preferably less than 0.8%, more preferably less than 0.5%.

The molecular weight of the sodium alginate is less than 10w, preferably less than 8w, and the molecular weight is greater than 2w, preferably greater than 4w.

Due to the large molecular weight and long molecular chain of sodium alginate, the viscosity in the solution is large, and the alginic acid solution with high viscosity is easy to be adsorbed to the polyester fiber in lumps when processing polyester, making the polyester The fibers are sticky and entangled, and the obtained polyester fibers are difficult to carry out subsequent processing. Therefore, the present disclosure reduces the dosage of alginic acid, and at the same time selects low molecular weight sodium alginate to treat the polyester.

In addition, it should be noted that in the sodium alginate solution, alginic acid is in a state of negative ions, which is easily attracted to positively charged substances, while the polyester fiber of the present disclosure adds calcium ions during the hydrolysis process, and also uses The cationic softener increases the positive charge of polyester fibers in solution, which is beneficial to the adsorption of alginic acid to polyester fibers.

Further, in the sodium alginate solution, sodium alginate and calcium ions will undergo ion exchange and then solidify, and in the pretreatment process of the present disclosure, a certain amount of calcium ions is introduced into the polyester, and the introduction of this calcium ion , can ion exchange with sodium alginate to improve the fixation performance of seaweed on polyester fiber.

Further, the polyester surface in the pretreatment is rough, and the rough surface provides more anchor points for the adsorption of seaweed, and the seaweed can be more stably adsorbed on the surface of the polyester fiber.

In some embodiments, the seaweed solution in step (2) also adds chitosan;

The chitosan is water-soluble chitosan.

The degree of deacetylation of the chitosan is greater than 80%, preferably greater than 90%.

The concentration of the chitosan is 1-2%.

In the present disclosure, chitosan is added to the alginic acid solution, and the chitosan exhibits a certain positive charge in the solution. During the adsorption process, it can be adsorbed like fibers according to molecular force. Forms an interpenetrating network with chitosan and attaches to the fiber surface.

In addition, the present disclosure also considers the influence of the addition of chitosan on the viscosity, therefore, chitosan with high deacetylation degree and high solubility is selected as the addition.

The chitosan added in the present disclosure makes the composite fibers have a positive charge, and at the same time adds a dye base to the fibers, thereby improving the dyeability of the fibers, and the dyeing conditions are mild. The dye is combined to achieve the effect of low temperature dyeing. In addition, chitosan has antibacterial properties by itself, and also gives the composite fiber certain antibacterial properties.

Further, the dissolving temperature of the alginic acid solution in step (2) is 20-60°C, preferably 25-50°C;

The dissolution time of step (2) is 20-120min, preferably 30-60min.

Step (2) also includes the treatment of polyester

Specifically, it includes putting the pretreated polyester fiber into the alginic acid solution.

Using intermolecular force, positive and negative charge force, the components in the alginic acid solution, including sodium alginate and/or chitosan, will be adsorbed to the polyester fiber.

Further, the bath ratio of the treatment is 1-10-1:100, preferably 1:20-1:50.

In some embodiments, the processing temperature of the polyester is 20-60°C, preferably 25-50°C;

In some embodiments, the treatment time of the polyester is 1-20 min, preferably 3-6 min.

The preparation method of a seaweed/polyester composite fiber of the present disclosure further comprises the following steps:

Step (3) curing

The solidified liquid includes calcium ions;

Further, the solidified solution includes calcium chloride;

The concentration of the calcium chloride is 1-5%.

Those skilled in the art know that the solidification of sodium alginate is mainly carried out by ion exchange, and the present disclosure uses calcium ion solution as the solidification solution, so that the sodium alginate adsorbed on the surface of the polyester fiber is converted into calcium alginate, and the solidification is realized. The sodium alginate is further able to fix other components, such as chitosan, on the fibers.

In some embodiments, a crosslinking agent is also added to the curing agent.

Described crosslinking agent is glutaraldehyde;

The dosage of glutaraldehyde is 0.2-2%;

The addition of glutaraldehyde can promote the cross-linking of chitosan and improve the adsorption fastness of chitosan and fibers. At the same time, the addition of glutaraldehyde can form a dense interpenetrating network between chitosan and calcium alginate. , to ensure the adsorption performance of calcium alginate, chitosan and polyester.

In some embodiments, the curing temperature is 30-90° C., and the curing time is 1-20 min.

The preparation method of a seaweed/polyester composite fiber of the present disclosure further comprises the following steps:

Step (4) drying

The purpose of the drying is to remove excess moisture from the fibers.

Drying the cured fibers in step (3) includes thermal drying and/or solvent drying.

Further, the present disclosure first performs solvent drying;

Specifically, an organic solvent is used as a desiccant to penetrate the moisture in the composite fiber into the organic solvent through poor penetration. This drying method can quickly absorb the moisture inside the composite fiber and improve the feel of the fiber.

Further, the solvent is ethanol and/or acetone.

In some embodiments, the present disclosure also thermally dries the composite fibers.

Specifically, the solvent-dried fibers are dried in an oven, the drying temperature is less than 60° C., and the drying time is more than 10 minutes.

In some embodiments, the present disclosure is to continuously thermally dry the composite fibers, and the drying equipment is 10-20 m long and the speed is 0.5-1 m/min.

In some embodiments, the present disclosure also provides a seaweed/polyester composite fiber, wherein the composite fiber includes polyester fiber and seaweed component, and the seaweed component is calcium alginate.

In some embodiments, the seaweed/polyester composite fiber further includes a chitosan component.

In some embodiments, the present disclosure also provides an application of seaweed/polyester composite fiber, including spinning and weaving the fiber.

Further, fabrics made from yarns made of the fibers are included.

Further, non-woven fabrics made of the fibers are included.

Further, it includes clothing materials and filter materials made of the fibers.

The beneficial effect of the present disclosure is that in the seaweed/polyester composite fiber and the preparation method thereof provided by the present disclosure, when the polyester fiber is treated, at least calcium ions are included in the alkaline solution, and the calcium ion is used in the treatment of the polyester fiber. , which will partially remain in the polyester surface layer, which can significantly increase the adsorption amount of seaweed and increase the fastness of seaweed at the same time.

Another beneficial effect of the present disclosure is that, when preparing the seaweed/polyester composite fiber, when the polyester fiber is surface-treated with lye, a cationic softener is also added, and the cationic softener can penetrate deep into the into the polyester and form a fixation, which is beneficial to the subsequent adsorption of seaweed components and increases the fixation fastness of seaweed.

Another beneficial effect of the present disclosure is that, when preparing the seaweed/polyester composite fiber, no additional binder is used, there is no problem of formaldehyde emission in the fiber, and the fiber is more environmentally friendly.

Another beneficial effect of the present disclosure is that, when preparing seaweed/polyester composite fibers, the molecular weight of alginic acid is less than 10W, and the concentration of alginic acid is less than 1%, so as to ensure that the viscosity of the alginic acid solution is small, and when the polyester fibers are immersed in the alginic acid In the solution, the adsorption of alginic acid to polyester does not exist adhesion phenomenon.

Another beneficial effect of the present disclosure is that, when preparing the seaweed/polyester composite fiber, water-soluble chitosan is added to the alginic acid solution, and the chitosan and seaweed form an interpenetrating network and are fixed on the surface layer of the fiber. The addition can not only impart antibacterial properties to the composite fibers, but also significantly improve the dyeing properties of the composite fibers, and the dyeing conditions are mild and the environmental pollution is less.

Another beneficial effect of the present disclosure is that, when the seaweed/polyester composite fiber is prepared, after adding water-soluble chitosan to the alginic acid solution, through curing and crosslinking, the charge properties of chitosan and alginic acid can be prepaid. The fiber has a certain adsorption capacity and has a filtering effect.

Another beneficial effect of the present disclosure is that, using an organic solvent as a desiccant, the moisture in the composite fiber can be quickly removed, and the obtained composite fiber has a soft feel.

Detailed ways

In order to make those skilled in the art better understand the technical solutions of the present disclosure, the solutions of the present disclosure will be further introduced in detail below.

The present disclosure first describes the terms or reagents used in the present disclosure,

The process of the present disclosure is a brand-new process, and the treatment process has high efficiency, and the composite fiber has excellent dyeing performance and antibacterial performance, and has good absorption performance at the same time.

The term seaweed used in the "seaweed/polyester composite fiber" described in this disclosure is mainly calcium alginate, which does not exclude the presence of a little possibly solidified sodium alginate.

The seaweed solution used in step (2) of the present disclosure mainly refers to sodium alginate. Those skilled in the art know that both alginic acid and calcium alginate are insoluble in water, and only sodium alginate is soluble in water. .

Specifically, an embodiment of the present disclosure relates to a preparation method of seaweed/polyester composite fiber, comprising the following steps

Step (1) Surface Treatment of Polyester Fiber

The lye solution is 0.02mol/L calcium hydroxide solution as the pretreatment solution of polyester fiber.

The treatment temperature is 120℃, and the treatment time is 20min;

The bath ratio is 1:50.

In some embodiments,

The lye is prepared by sodium hydroxide and calcium chloride, and the converted molar amount of calcium ions is 0.02mol/L.

The treatment temperature was 120°C, and the treatment time was 20 min.

In some embodiments,

The lye is prepared by calcium hydroxide and sodium chloride, wherein the molar amount of calcium ions is 0.02mol/L, and the molar amount of chloride ions is 0.02mol/L.

The treatment temperature was 90°C, and the treatment time was 20 min.

In some embodiments,

The lye solution is 0.02mol/L calcium hydroxide solution as the pretreatment solution of polyester fiber.

The treatment temperature was 80°C, and the treatment time was 20 min.

In some embodiments,

The lye is sodium hydroxide, and the molar amount of sodium hydroxide is 0.02mol/L.

The treatment temperature was 80°C, and the treatment time was 20 min.

In some embodiments,

The lye is prepared by sodium hydroxide and calcium chloride, and the converted molar amount of calcium ions is 0.02mol/L.

In addition, a quaternary ammonium salt softener was added, and the dosage of the softener was 1 g/L.

The treatment temperature was 120°C, and the treatment time was 20 min.

In another embodiment, the preparation method of the seaweed/polyester composite fiber of the present disclosure further comprises the following steps

The preparation of step (2) seaweed solution and the treatment of polyester

The preparation concentration is 0.5% alginic acid solution, wherein the molecular weight of sodium alginate is 5-7w.

After stirring and dissolving the alginic acid, the dissolving temperature was 40° C., the dissolving time was 60 min, and the solution was subjected to defoaming treatment after dissolving.

The polyester treated by the solution of including softener in the lye solution in the foregoing embodiment was put into the alginic acid solution, and the bath ratio was 1:50.

In some embodiments,

A 2% alginic acid solution is prepared, wherein the molecular weight of sodium alginate is 5-7w.

The polyester treated by the solution of including softener in the lye solution in the foregoing embodiment was put into the alginic acid solution, and the bath ratio was 1:50.

In some embodiments,

The preparation concentration is 0.5% alginic acid solution, wherein the molecular weight of sodium alginate is 5-7w;

Water-soluble chitosan is added to the alginic acid solution, the concentration of chitosan is 0.2%, and the degree of deacetylation is 95%.

The polyester treated by the solution of including softener in the lye solution in the foregoing embodiment was put into the alginic acid solution, and the bath ratio was 1:50.

In another embodiment, the preparation method of the seaweed/polyester composite fiber of the present disclosure further comprises the following steps

Step (3) curing

The solidified solution includes calcium chloride;

The concentration of the calcium chloride is 2%;

The polyester fiber that adsorbs alginic acid in the aforementioned step (2) is put into the calcium chloride solution for solidification; wherein the bath ratio is 1:50;

Specifically, the above-mentioned step (2) is used to prepare a 0.5% alginic acid solution, wherein the molecular weight of sodium alginate is 5-7w, and the treated polyester fiber is added to this embodiment for curing treatment.

In some embodiments,

The concentration of calcium chloride in the solidified solution was 2%, and the concentration of glutaraldehyde was 0.5%.

The polyester treated in the aforementioned step (2) with a concentration of 0.5% alginic acid and a chitosan concentration of 0.2% is cured, wherein the bath ratio is 1:50;

The curing temperature was 80°C, and the curing time was 10 minutes.

In some embodiments,

The concentration of calcium chloride in the solidified solution was 1%, and the concentration of glutaraldehyde was 0.2%.

The polyester treated in the aforementioned step (2) with a concentration of 0.5% alginic acid and a chitosan concentration of 0.2% is cured, wherein the bath ratio is 1:50;

The curing temperature was 40°C, and the curing time was 10 minutes.

In other embodiments, the preparation method of the seaweed/polyester composite fiber of the present disclosure further comprises the following steps:

Step (4) drying

The drying is first washed and dried with an ethanol solution, wherein the bath ratio is 1:50.

After ethanol is dried to absorb water, drying is performed at a drying temperature of 60° C. for 20 minutes.

In some embodiments,

Described drying is first washed, dehydrated and dried through acetone solution, and wherein the bath ratio is 1:50.

After drying with acetone, drying was performed at a drying temperature of 60°C and a time of 10 minutes.

In other embodiments, the present disclosure also provides a method for dyeing seaweed/polyester composite fibers.

Specifically, the seaweed/polyester composite fiber prepared above was put into 2% direct dye for dyeing, the dyeing temperature was 90° C., the dyeing time was 10 min, and the bath ratio was 1:50.

In other embodiments, the present disclosure discloses an application of seaweed/polyester composite fibers.

Specifically, the composite fibers are prepared into yarns.

Further, the yarns made of the composite fibers are woven into knitted fabrics, woven fabrics and/or non-woven fabrics.

In other embodiments, the present disclosure also provides a method for testing, and the fibers obtained in the above-mentioned embodiments of the present disclosure are tested.

The above performance tests are known to those skilled in the art and will not be repeated here.

The test results are shown in the table below

The results for the changes of pre-treated polyester fibers are as follows:

It can be seen from the test in the above table that after step 1, after the fiber is treated with lye, the fiber changes from untreated glossy fiber to matte fiber, it can be seen that the fiber is hydrolyzed, and after the softener is used, the fiber feels The obtained further improvement can be seen from the appearance that the fiber feels the best after the fiber is treated with softener and alkali solution.

The results of adsorption after treatment using alginate fibers are shown in the following table:

It can be seen from the test in the table above that during the curing process, the use of a crosslinking agent can significantly improve the feel of the fiber.

From the other effects in the above table, we also verified that when lye treats fibers, if the lye does not contain calcium ions, the feel of the fibers is relatively poor. The addition of calcium ions can fully increase the fibers and seaweed. Acid bonding, improve hand feel.

Certain exemplary embodiments of the present disclosure have been described above by way of illustration only, and it is needless to say that those skilled in the art may The described embodiments are modified. Accordingly, the above description is illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present disclosure.

Claims (10)

1. The preparation method of the seaweed polyester composite fiber is characterized by comprising the following steps:

step (1) surface treatment of polyester fiber;

step (2), preparing a alginic acid solution and treating polyester fibers;

step (3) curing;

drying in the step (4);

the method comprises the following steps of (1) preparing a pretreatment solution, wherein the pretreatment solution is an alkaline solution;

the alkaline solution includes calcium ions.

2. The method for preparing seaweed polyester composite fiber as claimed in claim 1,

the alkaline solution in the step (1) can also comprise sodium ions and potassium ions;

the alkaline solution comprises hydroxide ions and chloride ions;

the alkaline solution is prepared from one or more of sodium hydroxide, strong potassium oxide, sodium chloride and potassium chloride;

the pH value of the alkali liquor of the pretreatment liquid is 8-11;

the molar concentration of calcium in the alkali liquor is less than 0.022 mol/L.

The temperature of the pretreatment in the step (1) is more than 115 ℃, the time of the treatment is more than 15min, and the time of the pretreatment is less than 60 min.

3. The method for preparing seaweed polyester composite fiber as claimed in any one of claims 1 to 2,

adding a softening agent into the alkali liquor of the pretreatment liquid in the step (2); the softening agent is a cationic softening agent;

the cationic softening agent is one or more of tertiary amine salt, quaternary ammonium salt and alkyl imidazole derivative quaternary ammonium salt; the dosage of the cationic softener is 0.5-2%.

4. The method for preparing seaweed polyester composite fiber as claimed in claim 1,

in the step (2), the concentration of the sodium alginate in the preparation of the seaweed solution is less than 1 percent;

the molecular weight of the sodium alginate is less than 10w, and the molecular weight is more than 2 w.

5. The method of claim 4, wherein the polyester fiber is selected from the group consisting of polyester fiber,

chitosan is also added into the seaweed solution in the step (2); the degree of deacetylation of the chitosan is greater than 80%, preferably greater than 90%; the concentration of the chitosan is 1-2%.

6. The method for preparing seaweed polyester composite fiber as claimed in any one of claims 4 to 5,

the dissolving temperature of the alginic acid solution in the step (2) is 20-60 ℃, preferably 25-50 ℃;

the dissolving time of the step (2) is 20-120min, preferably 30-60 min.

The step (2) also comprises the treatment of polyester, the bath ratio of the treatment is 1-10-1:100, and the treatment temperature of the polyester is 20-60 ℃; the treatment time of the polyester is 1-20 min.

7. The method for preparing seaweed polyester composite fiber as claimed in claim 1,

in the step (3), the curing liquid contains calcium ions; the curing liquid comprises calcium chloride;

the concentration of calcium chloride is 1-5%.

8. The method of claim 8, wherein the polyester fiber is selected from the group consisting of polyester fiber,

a cross-linking agent is also added into the curing agent;

the cross-linking agent is glutaraldehyde;

the dosage of the glutaraldehyde is 0.2-2%;

the curing temperature is 30-90 ℃, and the curing time is 1-20 min.

9. The method for preparing seaweed polyester composite fiber as claimed in claim 1,

drying in the step (4) is to dry the fiber solidified in the step (3), wherein the drying comprises heat drying and/or solvent drying;

the solvent is ethanol and/or acetone.

10. Use of the algal polyester composite fiber according to any one of claims 1 to 9 for clothing materials and filter materials.