KR101264345B1 - Biocompatible Actuators and method for fabricating the same - Google Patents

Abstract

The present invention relates to a novel electroactive biopolymer-based actuator and a method for manufacturing the same, and more particularly, to a polymer composite membrane using cellulose-based biopolymer showing excellent biocompatibility with specific carbon nanoparticles that can improve operating performance. It relates to a high-performance biopolymer actuator having excellent biocompatibility including and a method of manufacturing the same.
The electroactive biopolymer actuator according to the present invention improves the physical properties of the electromechanical bending movement of the membrane by chemical interaction between the carbon nanoparticles and the cellulose-based biopolymer, and has excellent biocompatibility that can be verified by bacterial culture.

Description

Biocompatible Actuators and Method for Fabrication The Same

The present invention relates to a high performance biopolymer actuator having a novel biocompatibility, electroactivity and porosity and a method of manufacturing the same.

Recently, interest in electro-active polymer actuators based on natural polymers such as bacterial cellulose, plant cellulose and chitosan has been amplified in bio, electric, electronic and aerospace and marine industries. It's going on.

By the way, the operating angle displacement (deformation amount) of the polymer actuator until now has been limited.

In addition, the existing polymer actuator did not show biocompatibility because it uses an ion conductive polymer material commercialized mainly as Nafion, Flemion, and aceplex.

For example, Korean Patent Publication No. 2010-0104944 discloses a polymer electrolyte composite membrane using a polymer electrolyte membrane such as metal oxide fine particles and Nafion, Flemion, and a polymer actuator prepared therefrom.

In addition, Korean Patent Publication No. 2011-0085467 discloses a method of manufacturing a polymer actuator using a flexible polymer electrode composition for polymer actuators including a mixed solvent of ion conductive polymer material, water and alcohol, and a conductive filler.

However, these methods are not based on biopolymers and use ion-conducting polymers such as Nafion, so that their operational displacement is limited and thus cannot be used in various biomedical fields.

Moreover, previous polymer actuators have been processed by traditional solvent recasting techniques, and have not produced breathable membranes in nature or mimic natural muscle fiber structures.

In addition, natural polymer actuators have been limited to their application because they have been tested in complete hydrate state or in water.

In order to solve the above problems, the present invention has completed the present invention by developing an electroactive biopolymer actuator having excellent biocompatibility with a combination of carbon nanoparticles and cellulose-based biopolymers.

Accordingly, an object of the present invention is a polymer composite membrane capable of imparting porosity, biocompatibility, electroactive large strain, and low power consumption by using a thin film forming method based on cellulose-based biopolymer and carbon nanoparticles, and using the same An active biopolymer actuator and a method of manufacturing the same are provided.

In order to achieve the above object, the present invention provides an electroactive biopolymer actuator including a polymer composite membrane including carbon nanoparticles and a biopolymer.

The carbon nanoparticles may be any one or more selected from the group consisting of carbon nanotubes, graphene, carbon nanofibers, fullerenes, and fullerenols.

The polymer composite membrane may have a thickness of 10 to 500㎛.

The biopolymer may include any one or more cellulose-based biopolymers selected from the group consisting of bacterial cellulose, plant cellulose, starch and cellulose acetate.

In addition, both surfaces of the polymer composite film may further include a metal electrode having a thickness of 10 nm to 100 nm.

The metal electrode may include an electrode made of platinum, gold, silver, copper, or an alloy thereof.

In addition, the present invention comprises the steps of preparing a homogeneous solution by adding carbon nanoparticles to a solution containing a bio-polymer,

Preparing a polymer composite membrane using the homogeneous solution, and

Forming a metal electrode on both surfaces of the polymer composite film by electroless plating or deposition;

It provides a method for producing an electroactive biopolymer actuator comprising a.

The polymer composite film may be formed using any one or more methods selected from a casting method, a spin coating method, an electrospinning method, and an inkjet printing method.

Preferably, the polymer composite film may be formed using an electrospinning method to which a voltage of 10 to 50kv is applied.

The solution containing the biopolymer may include a mixed solvent of dimethylacetamide and acetone.

The electroactive biopolymer actuator according to the present invention has excellent operating displacement, biocompatibility, and low power consumption due to chemical interaction between carbon nanoparticles and cellulose-based biopolymers. In addition, the present invention can contribute to the industrialization since the production method of the biopolymer actuator is simple and mass production of the biopolymer actuator is possible.

The following drawings attached to this specification are illustrative of the preferred embodiments of the present invention, and together with the detailed description of the invention to be described later serve to further understand the technical spirit of the present invention, the present invention described in such drawings It should not be construed as limited to.
1A is a schematic diagram of SEM of the polymer composite membrane of the electrospun carbon nanoparticle-cellulose acetate of Example 1 and Comparative Example 2. FIG.
Figure 1b is a schematic diagram showing the structure of binding to fullerenol cellulose acetate of Example 1.
Figure 1c is a schematic diagram showing a structure in which the carbon nanotubes of Example 3 are bonded to cellulose acetate.
Figure 2 shows the photo before the electrospinning (a) and after the electrospinning (b) of the polymer composite membrane of carbon nanoparticles-cellulose acetate of Example 1.
FIG. 3 shows (CP / MAS) ¹³ C solid state NMR spectra of an electrospun pure cellulose acetate (a) of Comparative Example 1 and a polymer composite membrane (b) reinforced with cellulose acetate nanofibers of Example 1 with fullerenol The graph shown.
4 is a graph showing a comparison between the chemical interaction of carbon nanoparticles and cellulose according to Comparative Example 1-2 and Example 1 of the present invention.
5 is a graph showing a comparison of the stress-strain curve of the electroactive biopolymer actuator according to Example 1 and Example 1 of the present invention.
6a to 6d are graphs showing the operating displacement characteristics of the electroactive biopolymer actuator according to Comparative Example 1-2 and Example 1 of the present invention.

Hereinafter, the present invention will be described in more detail. However, the terms or words used in the present specification and claims should not be construed as being limited to the ordinary or dictionary meanings, and the inventors appropriately define the concept of terms in order to explain their inventions in the best way. It should be interpreted as meaning and concept corresponding to the technical idea of the present invention based on the principle that it can.

The present invention provides an electroactive biopolymer based actuator having excellent biocompatibility and a method of manufacturing the same.

According to one embodiment of the present invention, an electroactive biopolymer actuator including an electrospun polymer composite membrane including carbon nanoparticles and a biopolymer is provided.

In addition, the electroactive biopolymer actuator of the present invention is an actuator based on the carbon nanoparticles and the cellulose-based biopolymer of a specific content and component, and provides an excellent performance as well as excellent biocompatibility of the existing polymer actuator. In other words, the electroactive biopolymer actuator of the present invention exhibits a porous structure in which the extracellular matrix of natural muscle is imitated to show biocompatibility. This biocompatibility can be verified by bacterial culture. Therefore, the biopolymer actuator of the present invention is applicable to various biomedical fields.

Specifically, the polymer composite membrane included in the polymer actuator of the present invention includes carbon nanoparticles, and the properties of the biopolymer are enhanced by the use of the carbon nanoparticles.

The carbon nanoparticles are any one selected from the group consisting of carbon nanotubes (CNTs), graphene (Graphene), carbon nanofibers (CNF: Carbon Nano Fibers), fullerenes, and fullerenols. Preference is given to at least one, most preferably fullerenol.

The fullerenol, preferably polyhydroxy fullerenol (C _60- (OH) _n : n = 30) is biocompatible and water soluble, so that chemical interaction with the biopolymer occurs.

The carbon nanoparticles bind with the biopolymer, whereby peak shifts occur in carboxylate, carboxy and carbonyl bonds due to chemical interactions between the carbon nanoparticles and the biopolymer.

In addition, the carbon nanoparticles have a vigorous reactivity due to strong electrophilicity, and can selectively react nucleophilic addition with an alkaline carbonyl group.

In addition, the use of carbon nanoparticles may increase the crystallinity and tensile strength. That is, carbon nanoparticles may exhibit additional reactivity with β-unsaturated esters, resulting in small shifts between β-glucoside bonds and glucoside units exhibiting crystallization changes.

The biopolymer actuator has a C = O ester stretching of 1734-1755 cm ⁻¹ , CO stretching of an acetyl group of 1237 cm ⁻¹ , and stretching of a large OCC bond of 1049 cm ⁻¹ in the FT-IR spectrum Has

Preferably, when the biopolymer actuator is used as fullerenol carbon nanoparticles and cellulose acetate is used as the biopolymer, the C = O ester stretching of 1755 cm ^{−1 and} the acetyl group of 1237 cm ⁻¹ in the FT-IR spectrum. CO stretching, and stretching of large OCC bonds of 1049 cm ⁻¹ .

In the case of the carbon nanotubes, carbon nanofibers, and graphene, -OH, -COOH, etc. are present through functionalization, respectively. Thus, these materials are also combined with cellulose acetate (CA) with the same effect as fullerenol containing -OH groups. Fullerene also shows similar results as fullerenol. In particular, C = O ester stretching of 1734-1755 cm ⁻¹ by the acetate group of cellulose acetate is an important feature in the present invention.

The carbon nanoparticles may be included in an amount of 0.1 to 1.2 parts by weight, and more preferably 0.3 to 0.8 parts by weight, based on 100 parts by weight of the polymer composite film.

At this time, if the content of the carbon nanoparticles is less than 0.1 parts by weight It does not affect the improvement of the physical properties of the film and can not exhibit the effect of using carbon nanoparticles. In addition, the content of the carbon nanoparticles If it is 1.2 parts by weight or more, the aggregation phenomenon of the carbon nanoparticles occurs, and the expected effect is no longer achieved by the osmotic effect. The osmosis (percolation) refers to a phenomenon in which the physical properties of the composite membrane increases as the carbon nanoparticles are started to be saturated and then the physical properties of the membrane are saturated from a certain content.

The carbon nanoparticles may be a material having a generally known average particle diameter among the above materials, and is not particularly limited and may be appropriately selected and used. For example, the carbon nanotubes may have an average diameter of several tens to several hundred nm and an average length of several tens to several hundred μm, depending on the structure of single wall, multi-wall, bundle, etc., and may be appropriately selected and used as necessary. In addition, the carbon nanofibers may have an average diameter of 2-500 nm and an average length of 5-100 μm. In addition, the diameter of fullerene and fullerenol is about 1 nm.

In addition, the method for forming a thin film of the polymer composite film of the present invention is not particularly limited, but the polymer composite film including the electroactive biopolymer to which the carbon nanoparticles are added may be casted, spin coated, or electrospun. The thin film may be formed using any one or more methods selected from electro-spinning and inkjet-printing. Preferably, the polymer composite membrane is porous to form a thin film using an electrospinning method and is advantageous in biocompatibility.

In the present invention, when the polymer composite membrane is formed by electrospinning, since the electrospun biopolymer-based actuator is provided instead of the general nanofiber cellulose, the membrane is formed by chemical interaction between the carbon nanoparticles and the cellulose-based biopolymer. The physical properties, which are the electromechanical bending motions, are further improved.

The electrospinning method is a simple and efficient technique that can be manufactured to interact with fiber tissues. Therefore, in the present invention, the cellulose-based biopolymers enhanced by carbon nanoparticles are used to exhibit physical properties similar to those of porous, large specific surface area, and natural extracellular matrix (ECM) structures. do. In addition, the present invention is characterized in that it is easy to control the diameter of the fiber (that is, biopolymer) generated during electrospinning as well as the mechanical / electrical properties of the membrane through the carbon nanoparticle reinforcement. Therefore, the biopolymer actuator according to the present invention has a large operating displacement and may be used as a biocompatible actuator, and may be applied to artificial muscle, tissue engineering, drug transport, antimicrobial medical implantation, BIA sensor, and the like.

In addition, the biopolymer may include any one or more cellulose-based biopolymers selected from the group consisting of bacterial cellulose, plant cellulose, starch, and cellulose acetate. Most preferably cellulose acetate is used. In this case, the cellulose-based biopolymer includes a cellulose form.

In addition, the polymer composite membrane may have a thickness of 10 ~ 500㎛, more preferably, the polymer composite membrane may have a thickness of about 100㎛. In addition, the polymer composite membrane may have a porosity prepared by a conventional electrospinning method, for example, preferably has a porosity of 20 to 80%.

In addition, it is preferable to further include a metal electrode of 10nm to 100nm thickness on both sides of the polymer composite film. As for the thickness of the said metal electrode, it is more preferable that it is 10-30 nm, and it is most preferable that it is 20 nm.

The metal electrode is not particularly limited and a metal well known in the art may be formed, for example, an electrode made of platinum (Pt), gold (Au), silver (Ag), copper (Cu) electrode, or an alloy thereof. It may include. The metal electrode is preferably an electrode formed by depositing gold. In addition, the metal electrode may be formed in a thin film on both surfaces of the polymer composite film by a conventional electroless plating method or a deposition method.

On the other hand, according to another embodiment of the present invention, the step of preparing a homogeneous solution by adding carbon nanoparticles to a solution containing a biopolymer,

Preparing a polymer composite membrane using the homogeneous solution, and

Forming a metal electrode on both surfaces of the polymer composite film by electroless plating or deposition;

It provides a method for producing an electroactive biopolymer actuator comprising a.

The carbon nanoparticles may be added in an amount of 0.1 to 1.2 parts by weight, more preferably 0.3 to 0.8 parts by weight, and most preferably 0.5 to 0.6 parts by weight based on 100 parts by weight of the biopolymer.

In addition, the solution containing the biopolymer may further include a solvent, preferably a polar solvent. The type and content of the polar solvent is not particularly limited and may be included as a residual amount in preparing the solution. For example, dimethylacetamide, dimethylformamide, N-methylpyrrolidone, DMSO, acetone and the like can be included. In addition, the polar solvent may be used alone or in admixture of one or more, but preferably includes a mixed solvent of dimethylacetamide and acetone, the mixing ratio is 1: 1 to 10: 1 by volume ratio (v / v% ), Most preferably 2: 1. In addition, the amount of the solution is related to the amount of the syringe pump, one polymer membrane can be prepared in an amount used once the syringe.

In addition, the homogeneous solution may include a biopolymer, carbon nanoparticles, and a solvent, and when the spinning operation is performed during the preparation of the polymer membrane, the homogeneous solution may come out of the syringe and the solvent may be immediately blown away. Therefore, the final polymer membrane is made of fiber in solid form.

In addition, the polymer composite membrane may be formed using any one or more methods selected from the casting method, the spin coating method, the electrospinning method, and the inkjet printing method using the homogeneous solution as described above. Preferably, the polymer composite membrane may be formed using an electrospinning method in which a voltage of 10 to 50kv is applied using the homogeneous solution. More preferably, the voltage may be applied in the range of 20 to 30 kv. However, the present invention is not limited thereto, and may be performed within a voltage range used in a conventional electrospinning method.

In addition, a syringe pump or the like may be used to form the polymer composite membrane. In this case, the syringe pump may use a syringe having an internal diameter of 0.1 to 15 mm, preferably 5 to 15 mm, and most preferably 0.21 mm. Use

In addition, in order to form the polymer composite membrane into a thin film, a homogenization solution containing carbon nanoparticles and a biopolymer may be injected into the syringe, and the syringe may be pushed into a collector.

In addition, the above-mentioned voltage may be applied when the electrospinning is performed while spinning the homogenizing solution from the syringe. The spinning rate of the homogenization solution from the syringe can be 0.5 to 10 mL / h, preferably 2 ml / h.

In addition, after spinning of the homogenizing solution in forming the polymer composite film, the polar solvent may be dried and removed by a conventional method regardless of any of casting, spin coating, electrospinning, and inkjet printing.

Therefore, since the solvent is dried and removed when the polymer composite film is formed using the homogeneous solution, only the configuration in which the carbon nanoparticles and the biopolymer are combined in the final polymer composite film is included.

In addition, the metal electrode may be formed to a thickness of 10nm to 100nm as described above. In addition, the type thereof is not particularly limited, and an electrode made of the above-described platinum, gold, silver, copper electrode, or an alloy thereof may be formed, and preferably, an Au electrode may be formed. In addition, a method of forming the metal electrode is more preferably a vapor deposition method, and the vapor deposition method may be a well-known physical or chemical vapor deposition method.

The biopolymer-based actuator manufactured by the above method may have a thickness of several tens of micrometers to several mm, and may be adjusted as necessary and is not particularly limited.

Best Mode for Carrying Out the Invention Hereinafter, the function and effect of the present invention will be described in more detail through a specific embodiment of the present invention. However, the following examples are merely illustrated to aid the understanding of the present invention, and the scope of the present invention is not limited to these examples.

Example  1-3 and Comparative example  One

Biopolymer is cellulose acetate (CA; with powder; Mn ~ 30000 by GPC, containing 39.8 wt% acetyl group), carbon nanoparticles are fullerenol (C _60- (OH) _n : n = 30, from Sigma-Aldrich) And N, N-dimethylacetamide (DMAc; assay: 99.0%) were used.

In addition, a polymer actuator was prepared by the following method.

That is, 6 g of cellulose acetate was added to 300 ml of a mixed solution of DMAc / acetone (2: 1 = v / v) to prepare a solution. Thereafter, the mixture was stirred vigorously until a clear solution was obtained. A 20 wt / v% solution was prepared by this method.

Subsequently, 0.1 parts by weight, 0.5 parts by weight, and 1 parts by weight of fullerenol were added to the solution with respect to 100 parts by weight of the cellulose acetate content, and sonication was performed to make a homogenization solution in an ultrasonic bath. Example 1 was used as the case where 0.1 parts by weight of fullerenol was added, Example 2 was added when 0.5 parts by weight of fullerenol was added, and Example 3 was added when 1 part by weight of fullerenol was added. In this case, for convenience, Examples 1-3 are shown as 0.1 wt% fullerenol-CA, 0.5 wt% fullerenol-CA, and 1 wt% fullerenol-CA in the drawings.

The homogenization solution was then placed in a syringe with an internal diameter of 0.21 mm and the homogenization solution was pushed into a cylindrical collector at a rate of 2 mL / h. At this time, the syringe needle and the cylindrical collector to have a uniform thickness at a distance of 15cm, and was electrospun at a voltage of 25kV to prepare an electrospun membrane of 100μm thickness. At this time, the solvent was dried by a conventional method after the electrospinning.

In addition, the membrane was immersed in 1.5N aqueous lithium chloride solution overnight, and then a very thin gold electrode (thickness: 20 nm) was deposited on both sides of the membrane by physical vapor deposition to prepare a biopolymer-based actuator.

Example  4

A polymer composite membrane and a biopolymer-based actuator were manufactured in the same manner as in Example 1, except that 0.5 parts by weight of carbon nanotubes instead of fullerenol were changed.

Comparative example  One

Biopolymer cellulose acetate (CA; with powder; Mn ~ 30000 by GPC, containing 39.8 wt% acetyl group) was used in Comparative Example 1.

Experimental Example  One.

SEM pictures of the polymer composite membrane (nanofiber) of the electrospun carbon nanoparticle-cellulose acetate of Example 1 (containing a low concentration fullerenol, 0.1 part by weight) and Example 3 (containing a high concentration fullerenol, 1 part by weight). It is shown in Figure 1a.

In the results of FIG. 1A, Example 1 formed fibers with a minimum bead instability of 400-800 nm size. In addition, in Example 3, aggregation of the cellulose-fullerenol particles was induced to form wide beads.

Experimental Example  2.

In order to confirm the bonding relationship between fullerenol or carbon nanotubes and cellulose, the bonding structure of the polymer composite membranes of Examples 1 and 4 was measured.

That is, FIG. 1B is a schematic diagram showing a structure in which the fullerenol of Example 1 is bonded with cellulose acetate.

Figure 1c is a schematic diagram showing a structure in which the carbon nanotubes of Example 4 bond with cellulose acetate.

In Figure 1b, it can be seen that the C = O ester stretching occurs by the binding of cellulose acetate by -OH of the fullerenol of Example 1. In addition, in FIG. 1C, in the case of Example 4, it can be seen that C = O ester stretching is well performed by combining -COOH and cellulose acetate of carbon nanotubes, thereby inducing aggregation.

Experimental Example  3.

The photo before (a) and after electrospinning (b) of the polymer composite membrane (nanofiber) of the carbon nanoparticle-cellulose acetate of Example 1 is shown in FIG. 2.

In FIG. 2, the polymer actuator after electrospinning has a size of 10 × 40 × 0.1 mm.

3 shows (CP / MAS) ¹³ C solid state NMR of the polymer composite membrane (b) of which electrospun pure cellulose acetate (a) of Comparative Example 1 and cellulose acetate nanofibers of Example 1 were reinforced with fullerenol. Graph showing the spectrum.

Experimental Example  4. Chemical Interaction Assessment

In order to evaluate the properties of the biopolymer-based actuators of Examples 1-2 and Comparative Example 1, the chemical interaction between the carbon nanoparticles and the biopolymers was investigated by shift in the FT-IR spectrum, and the results were examined. 4 is shown.

As shown in FIG. 4, pure cellulose acetate (Comparative Example 1) is a C = O ester stretch of 1755 cm ⁻¹ , called the rule of three in shift, CO stretching of an acetyl group of 1237 cm ⁻¹ And stretching of large OCC bonds of 1049 cm ⁻¹ .

In addition, in the cellulose acetate membrane (0.1 parts by weight of fullerenol-CA, Example 1), the concentration of the fullerenol was low and no movement was observed, but the transmittance was changed. In addition, when the concentration of fullerenol was 0.5 parts by weight (Example 2), a shift of 20 cm ⁻¹ was observed at the three main bonds. This can be confirmed by the chemical interaction according to the saturation between the hydroxyl portion of fullerenol and the carbonyl group of cellulose acetate.

In addition, the strong electrophilicity of fullerenol has a violent reactivity, and can optionally undergo a nucleophilic addition reaction with an alkaline carbonyl group. In addition, the symmetrical stretching of the methyl group of 1167cm ^-1 of COC asymmetric stretching of combining and 1370cm ^-1 was pronounced. It is also known that fullerenol is capable of Michael addition with carbonyl, resulting in additional reactivity with β-unsaturated esters, resulting in a small shift at 896 cm ⁻¹ between glucoside units showing β-glucoside bonds and crystallization changes. This was caused.

Experimental Example  5. Working force  evaluation

In order to evaluate the characteristics of the biopolymer-based actuators prepared in Examples 1-2 and Comparative Example 1, a stress-strain analysis of the membrane was performed, and the results are shown in FIG. 5.

In the stress-strain curve (ie, stress-strain curve) of the electrospun membrane of FIG. 5, the conventional cellulose acetate fiber (Comparative Example 1) has a tensile strength of 1.6 MPa, but 0.1 weight. The negative fullerenol applied membrane (Example 1) increased the tensile strength as compared to Comparative Example 1 by 2.2MPa.

In addition, 0.5 parts by weight of the fullerenol applied membrane (Example 2) was 2.75MPa, the tensile strength significantly increased by more than 75%. The increase in tensile strength shows the chemical and physical interactions of the fullerenol and cellulose acetate moieties as discussed above.

Experimental Example  6. Evaluation of operating displacement characteristics

In order to evaluate the characteristics of the biopolymer-based actuators of Examples 1-2 and Comparative Example 1, the electromechanical driving performance of the actuator in the air was confirmed through the response and VI test of the actuator by DC voltage and AC voltage, The results are shown in FIG.

Specifically, the three nanofiber actuators obtained through the electrospinning technique applied the AC voltage of 3V at the frequencies of 0.1 Hz and 0.2 Hz to measure the end displacements, and the results are shown in FIGS. 6A and 6B. Indicated. In addition, the same experiment was conducted under wet conditions, and the results are shown in FIG. 6 (c), and the digital photograph results are shown in FIG.

As can be seen in Figures 6a and 6b, the end displacement of the actuator of 0.5 parts by weight of fullerenol-cellulose acetate of Example 2 showed four times the difference from the pure cellulose acetate actuator of Comparative Example 1 . In addition, it was confirmed that the polymer-based actuator of Example 1 also has a larger end displacement than Comparative Example 1 at the frequency.

In addition, it can be seen from the results of FIGS. 6C and 6D that Comparative Example 1 does not have a large end displacement compared to Example 1-2. In particular, in Example 2, the dislocation difference between the electrodes greatly increased the tip displacement due to the addition of fullerenol.

Claims (14)

By the chemical interaction between the hydroxyl group or carboxyl group of the carbon nanoparticles and the carbonyl group of the cellulose-based biopolymer, the carbon nanoparticles and the biopolymer A polymer composite membrane which is coupled by interaction;
An electroactive biopolymer actuator comprising metal electrodes on both sides of the polymer composite membrane.
The method of claim 1,
The carbon nanoparticles are any one or more selected from the group consisting of carbon nanotubes, graphene, carbon nanofibers, fullerenes and fullerenol.
The method of claim 1,
The polymer composite membrane is an electroactive biopolymer actuator having a thickness of 10 ~ 500㎛.
The method of claim 1,
The biopolymer is an electroactive biopolymer actuator comprising at least one cellulose-based biopolymer selected from the group consisting of bacterial cellulose, plant cellulose, starch and cellulose acetate.
The method of claim 1,
Electrochemically active bio-polymer actuator comprising a metal electrode of 10nm to 100nm thickness on both sides of the polymer composite membrane.
Claim 6 has been abandoned due to the setting registration fee. The method of claim 5,
The metal electrode is an electroactive biopolymer actuator including an electrode made of a platinum, gold, silver, copper electrode or an alloy thereof.
Preparing a homogeneous solution by adding carbon nanoparticles to a solution containing a biopolymer;
Preparing a polymer composite membrane using the homogeneous solution, and
Forming a metal electrode on both surfaces of the polymer composite film by electroless plating or deposition;
Method for producing an electroactive biopolymer actuator comprising a.
Claim 8 was abandoned when the registration fee was paid. The method of claim 7, wherein the polymer composite film is formed using any one or more methods selected from a casting method, a spin coating method, an electrospinning method, and an inkjet printing method.
Claim 9 has been abandoned due to the setting registration fee. The method of claim 7, wherein the polymer composite membrane is formed using an electrospinning method in which a voltage of 10 to 50kv is applied.
The method of claim 7, wherein
The metal electrode is a method of manufacturing an electroactive polymer actuator is formed to a thickness of 10nm to 100nm.
The method of claim 7, wherein the carbon nanoparticles are added in an amount of 0.1 to 1.2 parts by weight based on 100 parts by weight of the biopolymer.
The method of claim 7, wherein
The solution containing the biopolymer further comprises a mixed solvent of dimethylacetamide and acetone.
The method of claim 7, wherein
The carbon nanoparticles are any one or more selected from the group consisting of carbon nanotubes, graphene, carbon nanofibers, fullerenes and fullerenols.
The method of claim 7, wherein
The biopolymer is any one or more selected from the group consisting of bacterial cellulose, plant cellulose, starch and cellulose acetate fibers.

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