KR100931919B1 - Chitosan / polyaniline hybrid microfibers, process for their preparation and uses thereof - Google Patents

Abstract

More particularly, the present invention relates to a chitosan / polyaniline hybrid microfiber comprising a chitosan microfibre and a polyaniline coating layer formed on the surface of the chitosan microfibre, A first step of preparing chitosan microfibers by a spinning method and a second step of forming a polyaniline coating layer on the surface of the chitosan microfibers by an in-situ polymerization method to prepare chitosan / polyaniline hybrid microfibers ≪ / RTI > The chitosan / polyaniline hybrid microfibers according to the present invention exhibit an external stimulus responsive property and an improved electrical conductivity characteristic showing a large volume change with respect to external stimuli such as changes in pH, temperature, and solvent composition. As a result, It can be applied to artificial muscle and the like.

Chitosan, polyaniline, microfiber, electrical conductivity, biocompatibility, actuator, artificial muscle

Description

CHITOSAN / POLYANILINE HYBRID MICROFIBER, PREPARATION METHOD THEREOF AND THE USE THEREOF BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a chitosan / polyaniline hybrid microfiber,

More particularly, the present invention relates to a chitosan / polyaniline hybrid microfibers, and more particularly, to a chitosan / polyaniline hybrid microfibers, which comprises a chitosan microfibers and a polyaniline coating layer formed on the surfaces of the chitosan microfibers, Polyaniline hybrid microfibers which exhibit the properties of the chitosan / polyaniline hybrid microfibers and their production methods, and their use in actuators, capacitors and artificial muscles.

Functional polymer hydrogels are characterized by reversible volumetric changes to external stimuli such as pH, solvent composition, temperature, ion concentration, and electric field. A system in which the chemical free energy is converted into mechanical action by the stimulation of the surrounding environment is called a "chemomechanical system". In such a system, the chemical free energy in the polymer by the electrical stimulation enables mechanical work such as relaxation The polymer is called an electroactive polymer (EAP). Such polymer hydrogels have been researched and developed for application to artificial muscles similar to living muscles, small, noise-free driving devices, and biosensors and actuators capable of detecting various signals generated in living bodies.

In recent years, interest in hydrogel-based actuating systems has been increasing due to the stimuli-responsive behavior of hydrogels. Sidorenko et al. Have demonstrated reversible and fast switching of polymeric hydrogel-based actuating systems that enable a variety of applications, such as the development of artificial muscles (" Reversible switching of hydrogel-actuated nanostructures into complex micropatterns ", Science 315 2007), 487-490). In addition, Kim et al. Reported a self-oscillatory actuator of a polyaniline / hydrogel blend film at a constant DC voltage (" Self-oscillatory actuation DC voltage with pH sensitive chitosan / polyanilind hydrogel blends ", Chem. Mater. 18 (24) (2006), 5805-5809).

Chitosan is a polymer electrolyte polymer hydrogel similar to non-toxic cellulose suitable for the production of artificial muscles, which causes a large volume change in response to changes in pH, temperature or solvent composition. In addition, chitosan has the properties to absorb and bind bioactivity, biocompatibility, and water molecules. However, chitosan lacks electrical conductivity, resulting in insufficient response time, and high application voltage limits its application to devices.

On the other hand, interest in conductive polymeric actuators has also increased due to volume change characteristics resulting from ion exchange with an electrolyte in an electrochemical oxidation / reduction process. Furthermore, conductive polymer actuators have received much attention due to their high active strain and stress, good response times, acceptable and high electricity / weight ratios, and these materials have been developed with the development of biomimetic devices Lt; RTI ID = 0.0 > muscle-like < / RTI > Of the conductive polymers, polyaniline (PANi) has high conductivity, easy to synthesize, light weight, high strain, low operating voltage characteristics, and is desirable for the development of actuating materials. However, since conductive polymeric actuators are relatively weak in mechanical strength, research on techniques for producing IPN (interpenetrating network polymer) with composite materials, carbon nanotubes, and other polymers is needed.

Thus, by combining the conductive polymer with chitosan, the present inventors found that the hydrogel, chitosan, exhibits large expansion strain even when the deformation provided by the conductive polymer is relatively low, while the conductive polymer has a low working voltage, And it is intended to improve the characteristics applicable to the design of the actuator device by providing a quick response time.

The present invention relates to the development of chitosan / polyaniline hybrid microfibers, which improves the low electrical conductivity of the hydrogel chitosan and the low mechanical strength of the conductive polymer polyaniline, thereby improving the external stimulus responsiveness and electrical conductivity, And to develop novel hybrid materials that can be applied to artificial muscles.

As a result of intensive studies to solve the above technical problems, the inventors of the present invention have found that by preparing hydrogel chitosan microfibers and conducting in-situ polymerization on the surface of the produced chitosan microfibers, The chitosan / polyaniline hybrid microfibers prepared by forming the polyaniline coating layer have higher mechanical strength than the fibers made only of the conductive polymer and at the same time can lower the low electrical conductivity pointed out as a disadvantage of chitosan, .

The present invention provides a chitosan / polyaniline hybrid microfiber comprising a chitosan microfibre and a polyaniline coating layer formed on the surface of the chitosan microfibre.

The present invention also provides a method for producing a chitosan / polyaniline hybrid microfibers comprising a first step of producing a chitosan microfibre and a second step of forming a polyaniline coating layer on the surface of the chitosan microfibers produced.

The present invention also provides an actuator, a capacitor and an artificial muscle using the chitosan / polyaniline hybrid microfibers of the present invention.

The hybrid microfibers including chitosan having excellent biocompatibility and polyaniline having high electrical conductivity according to the present invention have the disadvantages in application of chitosan materials while maintaining high mechanical strength compared with the fibers made of conventionally conductive polymers only It is an excellent material that can solve the electric conductivity problem that has been raised to. That is, the chitosan / polyaniline hybrid microfibers of the present invention exhibit an external stimulus responsive property and an improved electrical conductivity characteristic that show a large volume change with respect to external stimuli such as changes in pH, temperature, and solvent composition, and thus the actuator, the capacitor and the artificial muscle And so on.

The present invention relates to chitosan / polyaniline hybrid microfibers exhibiting external stimulus responsive properties and improved electrical conductivity properties, a process for their preparation and their use.

Hereinafter, the present invention will be described in detail.

The chitosan / polyaniline hybrid microfibers of the present invention comprise chitosan microfibers and a polyaniline coating layer formed on the surface of the chitosan fibers.

The chitosan microfibers are produced by a wet-spinning method. Generally, fibers having a diameter of several tens to several tens of thousands of microns can be selected according to the application, and in particular, the chitosan microfibers preferably have a diameter of more than 0 to 100 탆. When the diameter exceeds 100 탆, penetration of polyaniline into the interior of the chitosan microfibers is not easy in the step of performing in-situ polymerization of polyaniline on the surface of the chitosan microfibers, so that the properties of the interior and exterior of the final chitosan / polyaniline hybrid microfibers .

The polyaniline coating layer is a coating layer formed by polymerizing an aniline monomer on the surface of the chitosan microfibers by an in situ polymerization method, and the thickness of the coating layer can be adjusted according to the application.

The chitosan / polyaniline hybrid microfibers comprising the chitosan microfibers and the polyaniline coating layer are prepared by mixing a gradient chitosan / polyaniline layer having a gradient to the content of chitosan and polyaniline near the interface between the chitosan microfibers and the polyaniline coating layer ). ≪ / RTI > In the present specification, the term "gradient chitosan / polyaniline layer" refers to a layer of chitosan microfibers in which aniline monomers penetrate into the interior of the chitosan microfibers during the formation of a polyaniline coating layer by an in- The content of the polyaniline particles decreases as the polyaniline particle is present in the center portion of the chitosan microfibers and the content of the polyaniline particles increases as the interface between the chitosan microfibers and the polyaniline coating layer increases, Means a layer in which a gradient to the content is formed.

The chitosan / polyaniline hybrid microfibers exhibit a granular morphology in which polyaniline particles are agglomerated on the surface of a chitosan microfiber.

The above-mentioned chitosan / polyaniline hybrid microfibers exhibit an external stimulus responsive property including a chitosan microfibers and exhibit a large volume change with respect to external stimuli such as changes in pH, temperature and solvent composition, Conductivity.

Next, a method for producing the chitosan / polyaniline hybrid microfibers of the present invention will be described.

The method for producing a chitosan / polyaniline hybrid microfibers of the present invention comprises a first step of preparing chitosan microfibers and a second step of forming a polyaniline coating layer on the surface of the chitosan microfibers produced.

Hereinafter, a method for producing the chitosan / polyaniline hybrid microfibers of the present invention will be described in detail, but the present invention is not limited to the following description.

The first step of producing the chitosan microfibers is a step of producing microfibers from the chitosan solution by the wet spinning method.

Wherein the first step comprises: 1-1) preparing a chitosan solution; 1-2 steps of spinning the prepared chitosan solution to produce microfibers; 1-3 steps of solidifying the chitosan microfibers that have been radiated; Washing the solidified chitosan microfibers 1-4; 1-5 steps of crosslinking the washed chitosan microfibers; And drying the cross-linked chitosan microfibers.

In the first step, a syringe connected to a stainless steel spinner jet having an inner diameter of 250 탆 is provided at one end, and a sodium hydroxide solution at a predetermined concentration is provided at the opposite end. A coagulation bath is provided, and the entire apparatus is carried out in a wet spinning apparatus connected by a syringe pump.

Step 1-1 is a step of preparing a chitosan solution, which is a step of dissolving chitosan in an aqueous acetic acid solution to prepare a solution. The chitosan had a 1.5 × 10 ⁵ to 9 × 10 ⁵ weight average molecular weight, it is preferred that the deacetylation degree of chitosan is 60 to 95%. The chitosan is dissolved in an aqueous acetic acid solution to prepare a chitosan solution having a concentration of 1 to 2% by weight.

Step 1 - 2 is a step of spinning a chitosan solution into a microfibre, which is carried out by injecting the prepared chitosan solution into a syringe of a wet spinning device and spinning it. The flow rate of the chitosan solution is preferably 150 to 500 μl / min.

Step 1-3 is a step of solidifying the chitosan microfibers that have been spun, which is carried out in a rotating coagulating bath containing a predetermined concentration of sodium hydroxide solution. The rotation speed of the coagulation bath is preferably 10 to 30 rpm.

Steps 1-4 are carried out by washing the coagulated chitosan microfibers by washing several times with distilled water in a coagulation bath.

Steps 1-5 are carried out by crosslinking the washed chitosan microfibers, carrying the chitosan microfibers in the crosslinking agent solution. As the crosslinking agent, glutaraldehyde, genifin, diisocynate and the like can be used. The carrying time is preferably 6 to 24 hours.

Step 1-6 is a step of drying the cross-linked chitosan microfibers, wherein the cross-linked microfibers are suspended vertically and performed at atmospheric conditions.

In the first step, the diameter of the chitosan microfibers can be controlled by adjusting the concentration of the chitosan solution, the spinning and crosslinking conditions, and the like according to the intended application.

The second step of forming a polyaniline coating layer on the surface of the chitosan microfibers is to polymerize an aniline monomer on the surface of the chitosan microfibers prepared in the first step by an in situ polymerization method to form a polyaniline coating layer.

The second step is a step 2-1 of carrying chitosan microfibers on a polymerization solution containing an aniline monomer; A step 2-2 of adding a polymerization initiator to the chitosan microfiber-loaded polymerized solution and in-situ polymerization to form a polyaniline coating layer; 2-3 steps of aging the in-situ polymerization solution having the polyaniline coating layer formed thereon; Separating the microfibers formed with the polyaniline coating layer from the aged polymerization solution; 2-5 steps of washing the separated microfibers; And drying the microfibers washed in steps 2-6.

More specifically, Step 2-1 is a step of impregnating an aniline monomer into the chitosan microfibers by supporting the chitosan microfibers on a polymerization solution containing an aniline monomer. The polymerization solution is preferably a solution in which an aniline monomer is dissolved in 1 M hydrochloric acid to have a concentration of 1 × 10 ^-6 to 1 mol. It is preferable to suspend the chitosan microfibers to the prepared polymerization solution for 0.5 to 5 hours.

Step 2-2 is a step of in-situ polymerization to form a polyaniline coating layer. The polymerization solution in the step 2-1 is uniformly stirred, and then a polymerization initiator of a predetermined concentration dissolved in hydrochloric acid is gradually added thereto, Polymerization. The in situ polymerization is preferably carried out at a temperature of from -5 to 25 캜 for from 4 to 48 hours. At this time, in the in-situ polymerization, a part of the aniline monomer penetrates into the interior of the chitosan microfibers and is polymerized therein. As a result, the content of the polyaniline particles decreases toward the central portion of the chitosan microfibers and decreases to the interface between the chitosan microfibers and the polyaniline coating layer As the content of polyaniline particles increases, a graded chitosan / polyaniline layer is formed which gradually forms a gradient with respect to the content of each component.

Step 2-3 is a step of aging the in-situ polymerization solution, and is preferably carried out by further stirring the polymerization solution of Step 2-2 at -5 to 25 캜 for 4 to 48 hours.

Step 2-4 is a step of separating the microfibers formed with the polyaniline coating layer from the aged polymerization solution in the 2-3 steps.

Step 2-5 is a step of washing the separated microfibers, which is performed by completely washing the microfibers separated in steps 2-4 with distilled water.

Step 2-6 is a step of drying the washed microfibers and drying at room temperature to prepare a chitosan / polyaniline hybrid microfibers in which a polyaniline coating layer is formed.

In the second step, the thickness of the polyaniline coating layer can be controlled by controlling the concentration of the polymerization liquid containing the aniline monomer, the concentration of the polymerization initiator, the in-situ polymerization, and the process conditions of the aging step.

Also, a polyaniline coating layer may be further formed on the surface of the prepared chitosan / polyaniline hybrid microfibers in the same manner as described above to prepare a double coated chitosan / polyaniline hybrid microfibers.

The chitosan / polyaniline hybrid microfibers of the present invention exhibit an external stimulus-responsive property and an improved electrical conductivity, and thus are applied to actuators, capacitors, particularly supercapacitors and artificial muscles.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the present invention. Such variations and modifications are intended to be within the scope of the appended claims.

Example  One

(1) Production of chitosan microfibers

Chitosan (manufactured by Jakwang Co.) having a weight average molecular weight of 2 × 10 ⁵ and a deacetylation degree of 76% was dissolved in an aqueous 2% by weight acetic acid solution to prepare a homogeneous 2% by weight chitosan solution without bubbling . The wet spinning device was equipped with a syringe connected to a stainless steel spinner jet having an inner diameter of 250 μm at one end and a coagulating bath containing a 0.1 M sodium hydroxide solution and rotating at 15 rpm at the opposite end, The whole device was connected to a syringe pump. The chitosan solution prepared from the syringe of the wet-type spinning device was introduced at a flow rate of 200 μL / min. The injected chitosan solution was radiated and solidified in a coagulation bath, and the coagulated microfibers were washed several times with distilled water. The washed microfibers were crosslinked by carrying them in a glutaraldehyde solution for 24 hours. The crosslinked microfibers were hanged vertically and dried under atmospheric conditions to prepare chitosan microfibers. The diameter of the prepared chitosan microfibers was 80 탆.

(2) Formation of a polyaniline coating layer

A polymerization solution in which 0.01 mol of aniline monomer was dissolved in 100 ml of 1 M hydrochloric acid was prepared, and the chitosan microfibers prepared above were suspended in the polymerization solution for 2 hours. The polymerized liquid carrying the chitosan microfibers was stirred at a rate of 1 ml / min, and a solution for polymerization initiator in which 0.0125 mol of ammonium persulfate was dissolved in 100 ml of 1 M hydrochloric acid was gradually added thereto, In-situ polymerization was performed for a period of time to form a polyaniline coating layer. After the polymerization was completed, the mixture was further stirred at -4 DEG C for 6 hours for aging. The microfibers having the polyaniline coating layer formed thereon were separated from the aged polymer solution, washed thoroughly with distilled water, and dried at room temperature to prepare a chitosan / polyaniline hybrid microfibers in which a single coating layer of polyaniline was formed.

Example 2

A chitosan / polyaniline hybrid microfiber in which a polyaniline single coating layer was formed in Example 1 was prepared and then a polyaniline double coating layer was formed on the surface of the microfibers in the same manner as in Example 1 Respectively.

The chitosan / polyaniline hybrid microfibers formed with a single coating layer were immersed in a polymerization solution in which 0.01 mol of aniline monomer was dissolved in 100 ml of 1 M hydrochloric acid for 2 hours. This was stirred at a rate of 1 ml / min, and a polymerization initiator solution in which 0.0125 mol of ammonium persulfate was dissolved in 100 ml of 1 M hydrochloric acid was slowly added thereto, and in-situ polymerization was carried out at 16 ° C for 6 hours . After the polymerization was completed, the mixture was further agitated at -4 DEG C for 42 hours. The microfibers were separated from the aged polymerization solution, thoroughly washed with distilled water, and then dried at room temperature to prepare a chitosan / polyaniline hybrid microfibers in which a polyaniline double coating layer was formed.

Test Example 1. Surface morphology analysis

The surface morphology of the chitosan / polyaniline hybrid microfibers prepared in Example 2 was analyzed using a scanning electron microscope (SEM, Hitachi S-4700). The results are shown in Fig.

Fig. 1 (a) is an SEM photograph showing the surface of the chitosan microfibers, (b) is a SEM photograph showing the surface of the chitosan / polyaniline hybrid microfibers formed with the polyaniline coating layer, Is a high-resolution SEM photograph showing the surface of the substrate. As a result, a polyaniline coating layer showing a lumpy granular morphology including polyaniline particles of a few nanometers in size was completely formed on the surface of the chitosan microfibers. This polyaniline coating layer was found to be effective for the diffusion of solvents, hydrogenated protons and chlorine ions Lt; RTI ID = 0.0 > electrochemical < / RTI > actuation. 1 (d) is an SEM photograph showing a cross section of the chitosan / polyaniline hybrid microfibers. As a result, it was confirmed that the average thickness of the prepared polyaniline coating layer was 7.5 mu m.

Test Example 2. Elemental analysis

Elemental analysis of the section of the chitosan / polyaniline hybrid microfibers prepared in Example 2 was analyzed using a scanning electron microscope (EDX-SEM, Horia 7200-H) equipped with an energy dispersive X-ray spectroscope, 2.

Fig. 2 shows changes in the ratio of nitrogen, chlorine and sulfur with the distance from the surface to the center of the chitosan / polyaniline hybrid microfibers. Hwang is combined with polyaniline in the form of per sulfate ion and is easily washed out by washing. Since chlorine is also similar to sulfur, the content of polyaniline particles in the chitosan hydrogel matrix can be measured by changing the ratio of nitrogen. That is, the content of polyaniline particles gradually decreased from the surface to the center of the hybrid microfibers, and a gradient chitosan / polyaniline layer showing a gradient with respect to the content of chitosan and polyaniline was present.

Test Example 3. Measurement of Conductivity

The electrical conductivity of the chitosan / polyaniline hybrid microfibers prepared in Example 2 was measured by a two-point probe method at room temperature using an electrometer (Keithley Model 2400) and calculated by the following equation (1).

σ (conductivity) = I / V × l / A

In Equation (1), I represents a current, V represents a potential, I represents a length of a fiber, and A represents a cross-sectional area of the fiber.

The conductivity of the prepared chitosan / polyaniline hybrid microfibers was 2.856 x 10 < ^-2 & gt ^; S / cm. Generally, chitosan hydrogel microfibers are known to exhibit very low conductivity. However, although the chitosan / polyaniline hybrid microfibers according to the present invention are mainly composed of a chitosan hydrogel matrix, part of the aniline monomer penetrates into the inside of the chitosan microfibers during the in-situ polymerization and is polymerized there, The polyaniline particles were well dispersed in the microfibers and exhibited relatively higher conductivity than microfibers made of a single material of chitosan.

Test Example 4. Analysis of electrochemical and chemical actuation characteristics

The electrochemical actuation characteristics of the chitosan / polyaniline hybrid microfibers prepared in Example 2 were measured using a dual-mode muscular arm system (CHI 627B) equipped with an electrochemical analyzer (Aurora Scientific Inc.) under the following conditions The cyclic voltammogram was recorded and analyzed.

One end of the chitosan / polyaniline hybrid microfibers was fixed to the end of the arm of the system using silicon glue and the other end was connected to the electrochemical device using a platinum wire. The chitosan / polyaniline hybrid microfibers were equilibrated in hydrochloric acid for 3 hours with a force of 5.5 mN, and the pH of the hydrochloric acid solution was adjusted to 0, 1, and 2 to conduct an actuation test. The strain rate during the electrochemical actuation test was calculated by the following formula 2, and the strain rate with time was shown in FIG.

Strain rate (%) =? 1 / l ₀ 100

In the above equation (2), l ₀ is the length before deformation of the chitosan / polyaniline hybrid microfibers, and? 1 represents the length changed during the actuation test.

As shown in FIG. 3, the strain of electrochemical actuation was found to be 0.39% at pH 0, 0.21% at pH 1, and 0.05% at pH 2. That is, the chitosan / polyaniline hybrid microfibers responded to electrical stimulation and exhibited high strain rates at pH 0, and these strain rates decreased gradually with increasing pH.

In addition, the chemical actuation corresponding to the switching between pH 0 and 1 in the HCl solution was tested. The strain rate during the chemical actuation test is calculated by the equation (2), and the strain rate with time is shown in FIG.

As shown in Fig. 4, the strain of the chemical actuation corresponding to the switching between pH 0 and 1 was as high as 6.73%. This is a typical phenomenon in biopolymer hydrogels under stressed conditions, and this biocompatibility is maintained even after the polyaniline coating layer is formed.

1 is a SEM photograph (a) of chitosan microfibers according to Example 2 of the present invention, a SEM photograph (b) of chitosan / polyaniline hybrid microfibers, a high-resolution SEM photograph (c) of chitosan / polyaniline hybrid microfibers, d) SEM photograph (d) of cross section of chitosan / polyaniline hybrid microfibers,

2 is a graph showing an elemental analysis result of a cross section of a chitosan / polyaniline hybrid microfibers according to Example 2 of the present invention,

3 is a graph showing the deformation rate of electrochemical actuation of chitosan / polyaniline hybrid microfibers according to Example 2 of the present invention with time,

FIG. 4 is a graph showing the strain of chemical actuation over time of the chitosan / polyaniline hybrid microfibers according to Example 2 of the present invention. FIG.

Claims (17)

Chitosan microfibers, and A chitosan / polyaniline hybrid microfibers comprising a polyaniline coating layer formed on the surface of the chitosan microfibers. The method according to claim 1, A gradient chitosan / polyaniline layer in which the content of polyaniline particles decreases toward the central portion of the chitosan microfibers and the content of polyaniline particles increases toward the interface between the chitosan microfibers and the polyaniline coating layer is provided on the interface between the chitosan microfibers and the polyaniline coating layer Wherein the chitosan / polyaniline hybrid microfibers comprise: The method according to claim 1, Wherein the chitosan micro-fiber is a chitosan / polyaniline hybrid micro-fiber having a diameter of more than 0 but not more than 100 탆. A first step of producing a chitosan microfibre, and And a second step of forming a polyaniline coating layer on the surface of the prepared chitosan microfibers. 5. The method of claim 4, The first step of producing the chitosan microfibers is, The stainless steel spinner jet, the syringe, and the coagulation bath were connected by a syringe pump to a stainless steel spinner jet at one end and a syringe connected to the stainless steel spinner jet at the other end. Polyaniline hybrid microfibers is carried out using a wet spinning device connected to the chitosan / polyaniline hybrid microfibers. 5. The method of claim 4, The first step of producing the chitosan microfibers is, A step 1-1 of preparing a chitosan solution; 1-2 steps of spinning the prepared chitosan solution to produce microfibers; 1-3 steps of solidifying the chitosan microfibers that have been radiated; Washing the solidified chitosan microfibers 1-4; 1-5 steps of crosslinking the washed chitosan microfibers; And A method for producing a chitosan / polyaniline hybrid microfibre comprising the steps of: (1) 1-6 drying crosslinked chitosan microfibers. The method according to claim 6, The chitosan is weight average molecular weight of 1.5 × 10 ⁵ to 9 × 10 ^5, DI method of producing a degree of acetylation of 60 to 95% of the chitosan / polyaniline hybrid microfibers. The method according to claim 6, A process for producing a chitosan / polyaniline hybrid microfibers by spinning a chitosan solution at a flow rate of 150 to 500 μl / min is carried out by spinning the chitosan solution in a syringe of a wet spinning apparatus. Way. The method according to claim 6, The method for producing a chitosan / polyaniline hybrid microfibre according to any one of claims 1 to 3, wherein the chitosan microfibers are coagulated in a coagulation bath rotating at 10 to 30 rpm. The method according to claim 6, The method for producing a chitosan / polyaniline hybrid microfibers according to any one of claims 1 to 5, wherein the step (1-5) of crosslinking the chitosan microfibers is carried out in a crosslinking agent solution for 6 to 24 hours. 5. The method of claim 4, The second step of forming the polyaniline coating layer comprises: A step 2-1 of carrying a chitosan microfibre over a polymerization liquid containing an aniline monomer; A step 2-2 of adding a polymerization initiator to the chitosan microfiber-loaded polymerized solution and in-situ polymerization to form a polyaniline coating layer; 2-3 steps of aging the in-situ polymerization solution having the polyaniline coating layer formed thereon; Separating the microfibers formed with the polyaniline coating layer from the aged polymerization solution; 2-5 steps of washing the separated microfibers; And And drying the washed microfibers. The method for producing a microfibre chitosan / polyaniline hybrid according to claim 1, 12. The method of claim 11, The method for producing a chitosan / polyaniline hybrid microfibers according to any one of claims 1 to 3, wherein the step 2-1 of carrying the chitosan microfibers is performed for 0.5 to 5 hours. 12. The method of claim 11, Wherein the step 2-2 of forming a polyaniline coating layer by in-situ polymerization is carried out at -5 to 5 DEG C for 4 to 48 hours. 12. The method of claim 11, Wherein the step 2-3 of aging the in-situ polymerization solution is carried out at -5 to 5 ° C for 4 to 48 hours. An actuator manufactured using a chitosan / polyaniline hybrid microfiber comprising a chitosan microfibre and a polyaniline coating layer formed on a surface of the chitosan microfibre. A chitosan / polyaniline hybrid microfibre comprising a chitosan microfibre and a polyaniline coating layer formed on the surface of the chitosan microfibre. A chitosan / polyaniline hybrid microfiber comprising a chitosan microfibre and a polyaniline coating layer formed on a surface of the chitosan microfibre.

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