KR102297347B1 - Tensegrity structure composite material and the manufacturing method for the same - Google Patents

Abstract

As a material applicable to various technical fields requiring flexibility and rigidity at the same time, it is a composite material to which a tensor grit structure is applied, and includes a first structure and a second structure, wherein the first structure includes a plurality of first structural members, , wherein each endpoint of the plurality of first structural members is a three-dimensional network structure directly connected to each other, and the second structure is a plurality of third structures having endpoints directly connected to endpoints of at least some of the endpoints of the first structural member. A three-dimensional structure including two structural members, wherein the plurality of second structural members are not directly connected to each other or are partially directly connected to each other, wherein the second structure is located inside the first structure, 1 Structural member provides a tensor grit structure composite including a first resin and magnetic particles, and a method of manufacturing the same.

Description

TENSEGRITY STRUCTURE COMPOSITE MATERIAL AND THE MANUFACTURING METHOD FOR THE SAME

It relates to a composite material to which a tensor grit structure is applied as a material that can be applied to various technical fields requiring flexibility and rigidity at the same time, and a method for manufacturing the same.

With the recent development of robotics technology, interest in technology for implementing more natural morphological movement by applying a biomimetic system to the components of a mechanical robot is high. Such a biomimetic system may be possible based on a basically soft material, but so far, in the design of a robot, it is difficult to achieve an environment that generates an appropriate behavior at a desired scale, due to the inherent complexity of an actual biological system. had a lot of difficulties

From a material point of view, materials that respond to stimuli have been developed into several types to impart reversible properties and adaptability to artificial systems based on the technology of transforming one form of energy into another. However, most of the existing materials for this purpose are only capable of imparting properties on a limited scale due to their unique molecular structure. In other words, the multi-material itself and its structural form that can share some common properties with real living organisms while allowing systematic functions to be performed in consideration of both the desired structural properties and the essential properties of the material development is an area that needs further research.

In addition, in order to fully utilize the potential of soft materials along with the development of materials, it is imperative to develop a simple manufacturing route capable of manufacturing components with complex structures.

One embodiment of the present invention is to provide a complex having a tensorgrity structure that is highly likely to be used as a soft material and can be applied to a biomimetic system to implement a system having high similarity to an organism.

Another embodiment of the present invention is to provide a method for maximizing the utilization potential of the complex of the tensor grit structure, and to provide a method for manufacturing a tensor grit structure composite capable of simple manufacture of a complex structure.

In one embodiment of the present invention, a three-dimensional structure comprising a first structure and a second structure, wherein the first structure comprises a plurality of first structural members, and each end point of the plurality of first structural members is directly connected to each other. A network structure, wherein the second structure comprises a plurality of second structural members having endpoints directly connected to at least some of the endpoints of the endpoints of the first structural member, wherein the plurality of second structural members are directly connected to each other. It is a three-dimensional structure that is not connected or partially directly connected to each other, the second structure is located inside the first structure, and the first structural member is a tensor grit structure including a first resin and magnetic particles. Composite materials are provided.

In another embodiment, there is provided a method comprising: preparing a mold having a flow path corresponding to a desired shape of the first structural member and a second structural member; preparing a composition for forming a first structural member including a first resin and magnetic particles; injecting the composition for forming the first structural member into the flow path of the mold; curing the composition for forming the first structural member injected into the mold; and removing the mold.

The tensor grit structure composite has a high potential for use as a soft material, and has the advantage of being applied to a biomimetic system to realize a stimulus-response system having high similarity to an organism.

The manufacturing method of the tensor grit structure composite is a method capable of maximizing the utilization potential of the complex of the tensor grit structure, and may provide a means for simple manufacturing of a complex structure.

1 is a conceptual diagram illustrating an exploded view of the tensorgrity structure composite and its detailed configuration according to an embodiment.
2 is a view showing the direction of movement of the tensor grit structure composite material according to an embodiment by an arrow.
3 (a) to (d) show the shapes of the tensor grit structure composites 200 , 300 , 400 and 500 according to another embodiment.
4 illustrates a shape of a tensorgrity structure composite 600 according to another embodiment.
5(a) to 5(c) show 3 different tensorgrity structural units 700 having the same tensorgrity structural unit 700 as that of the tensorgrity structural composite material 600 of FIG. Several cases are shown.
6 schematically shows a sequence of a method for manufacturing the tensorgrity structure composite according to an embodiment.
7 shows the evaluation results of the tensor grit structure composite material prepared according to Examples 2-1 to 2-5 and Experimental Example 2 therefor.
Fig. 8 shows a tensorgrity structural composite fabricated according to Example 5 and its tensorgrity structural unit.
9 (a) to (d) show the directional selectivity evaluation results of the kinetic displacement according to the magnetic field application of each of the tensor grit structure composites of Examples 1-2 to 1-5 according to Experimental Example 1.
10 is a graph illustrating magnetic field stimulation-response evaluation results according to the content of magnetic particles of Examples 3-1 to 3-6 according to Experimental Example 3;
11 (a) to (c) show the evaluation results of tensile motion by applying a magnetic field to the tensor grit structure composites of Examples 4-1 to 4-3 according to Experimental Example 4;
12 (a) to (c) show the evaluation results of bending motion by applying a magnetic field to the tensor grit structure composites of Examples 4-1 to 4-3, respectively, according to Experimental Example 4.
13 shows the evaluation results of kinetic properties when an external stimulus is applied to the lattice-type tensor grit structure composite of Example 5 according to Experimental Example 5;

Advantages and features of the present invention, and a method of achieving them will become clear with reference to the following examples. However, the present invention is not limited to the embodiments disclosed below, but will be implemented in various different forms, Only the present embodiments are provided so that the disclosure of the present invention is complete, and to completely inform those of ordinary skill in the art to which the present invention belongs, the scope of the invention, the present invention is defined by the scope of the claims will only be

In order to clearly express various layers and regions in the drawings, the thicknesses are enlarged. And in the drawings, for convenience of description, the thickness of some layers and regions are exaggerated. Like reference numerals refer to like elements throughout.

Also, in the present specification, when a part of a layer, film, region, plate, etc. is said to be “on” or “on” another part, this is not only when it is “directly on” another part, but also when there is another part in the middle. also includes Conversely, when we say that a part is "just above" another part, we mean that there is no other part in the middle. In addition, when a part of a layer, film, region, plate, etc. is said to be "under" or "under" another part, it is not only when it is "under" another part, but also when there is another part in between. include Conversely, when we say that a part is "just below" another part, it means that there is no other part in the middle.

A tensor grit structure composite material according to an embodiment will be described with reference to FIGS. 1 to 13 . 1 is a conceptual diagram illustrating an exploded view of a tensor grit structure composite material and a detailed configuration thereof according to an embodiment.

Referring to FIG. 1 , in one embodiment, the tensorgrity structure composite 100 includes a first structure 10 and a second structure 20 , and the first structure 10 includes a plurality of second structures. A three-dimensional network structure including one structural member 11 and each end point of the plurality of first structural members 11 is directly connected to each other, and the second structural member 20 is the end of the first structural member 11 . Disadvantages include a plurality of second structural members 21 having endpoints directly connected to the endpoints of at least some of the disadvantages, wherein the plurality of second structural members 21 are not directly connected to each other or are partially arranged in direct connection with each other. It is a three-dimensional structure, the second structure 20 is located inside the first structure 10, the first structure member 11 is a tensor grit including a first resin and magnetic particles (Tensegrity) to provide a structural complex.

The first structure 10 is an outer structure of the tensor grit structure composite, and the second structure 20 is located inside the first structure 10 . The first structure 10 has a sidewall of a network structure formed by interconnecting a plurality of the first structure members 11 . The interior of the first structure 10 means a space formed surrounded by the first structure member 11 constituting the first structure 10 , and the second structure 10 is disposed in this space. The first structure 10 may serve as a tension-imparting structure in the tensor-grity structure composite 100 , and the second structure 20 may serve as a rigidity-imparting structure.

The first structure 10 includes a plurality of first structural members 11 , and is a three-dimensional network structure formed by combining the first structural members 11 . In addition, the second structure 20 includes a plurality of second structural members 21 , and is a three-dimensional structure formed by combining the second structural members 21 .

The first structure 10 is structured in a three-dimensional network shape by directly connecting end points of each of the plurality of first structure members 11 to each other. Referring to FIG. 1 , in one embodiment, the first structure 10 may have a cylindrical shape or a polygonal prism shape. In addition, the cylindrical or polygonal pillar-shaped wall surface of the first structure 10 may have a mesh shape in which polygons are continuously arranged. In this case, the connection points where the end points of the plurality of first structural members 11 are directly connected to each other may be located at the vertices of three or more continuous polygons constituting the outer wall surface of the structure 10 .

In one embodiment, the first structure 10 may have a cylindrical shape. Connection points to which the end points of the first structural member 11 are connected are positioned at the vertices of a quadrilateral or a triangle of the outer wall of the cylindrical shape to form a network structure in which the quadrilaterals or triangles are continuously arranged. Since the first structure 10 has such a continuous structure, it is possible to easily perform a tensile motion by applying a magnetic field.

In one embodiment, the second structure 20 may be a three-dimensional structure arranged so that the plurality of second structure members 21 are not directly connected to each other. The plurality of second structural members 21 may not be directly connected to each other but may be disposed in a form connected to at least some of the endpoints of the first structural member 11 . Specifically, both end points of the second structural member 21 may be positioned inside the first structural member 10 in a form coupled to a connection point between the first structural members 11 , respectively.

Referring to FIG. 1 , in one embodiment, both end points of the second structural member 21 may be respectively connected to two end points of a plurality of end points of the first structural member 11 and disposed. . That is, the connection structures of the plurality of second structural members 21 are not directly connected to each other, but may be a discontinuous structure indirectly connected to each other via the first structural member 11 . As the second structure 20 is positioned in the inner space of the first structure 10 while having a discontinuous structure as described above, a function of imparting rigidity may be improved.

Due to the combination structure of the first structure 10 and the second structure 20 as described above, the tensor grit structure composite 100 may be excellent in both tensile and rigidity, and shrink and contract in a predetermined direction. It has the advantage of securing a certain level or more of support while at the same time being able to be stretched.

The first structural member 11 of the first structural body 10 includes a first resin and magnetic particles. In one embodiment, the first structural member 11 may be made of an elastomeric magnetic composite including the first resin and the magnetic particles. The elastic magnetic composite may be a composite material including a magnetic filler using a rubber resin as a matrix, wherein the first resin may be a rubber resin, and the magnetic particles may be a magnetic filler.

The first resin is a silicone resin, a polydimethylsiloxane (PDMS) resin, an epoxy resin, a gel resin, a Teflon resin, a fluorinated silicone (FKM) resin, a polyacrylic rubber resin, and these resins. It may include one selected from the group consisting of a combination of. In one embodiment, the first resin may include a PDMS resin or a silicone resin. In one embodiment, the first resin is the PDMS resin to the silicone resin in a weight ratio of 10:0 to 0:10, for example, 9:1 to 1:9 by weight, for example, 5:4 to It may be included in a weight ratio of 1:9, for example, in a weight ratio of 5:5 to 1:9, for example, in a weight ratio of 3:7 to 1:9.

The magnetic particles are pure iron, iron oxide (Fe ₃ O ₄ ), Nd-Fe-B alloy, nickel, cobalt, Fe-Nd alloy, Fe-Si alloy, Fe-Al alloy, Fe-Si-Al alloy, Ni-Zn It may include one selected from the group consisting of ferrite, Cu-Zn ferrite, Mn-Zn ferrite, and combinations thereof. In one embodiment, the magnetic particles may include iron oxide (Fe3O4).

The magnetic particles may have a saturation magnetic moment per unit mass of 30 emu/g or more, for example, 30 emu/g to 220 emu/g. By using the magnetic particles having such a saturated magnetic moment per unit mass, the shrinkage and elongation displacement due to magnetic application of the tensor grit structure composite material may have an advantage suitable for application to a biomimetic system.

The average particle diameter of the magnetic particles may be 100 nm to 100 μm, for example, about 100 nm to about 90 μm, for example, about 100 nm to about 80 μm, for example, about 100 nm to about 80 μm. It may be about 70 μm, for example, about 1 μm to about 50 μm. By using the magnetic particles in the above range, excellent dispersibility in the first resin can be ensured, and at the same time, the contraction and stretching displacement by the application of a magnetic field to the tensor grit structure composite material is suitable for application to a biomimetic system. can have an advantage.

The first structural member 11 may include 1 to 40 parts by weight of the magnetic particles based on 100 parts by weight of the total weight of the magnetic particles and the first resin, for example, 5 to 35 parts by weight. It may include parts by weight, for example, 5 parts by weight to 30 parts by weight. By using the magnetic particles of the above content, the dispersibility of the magnetic particles in the first resin can be excellently implemented, and the tensile mobility of the tensor grit structure composite material by the application of a magnetic field can be secured at a desired level.

The second structural member 21 serves to impart structural rigidity to the tensor grit structure composite 100, and includes the second resin, Low Melting Point Alloy (LMPA), or a combination thereof. may include The second resin may be the same as or different from the first resin.

The second resin is acrylonitrile-butadiene-styrene (ABS, Acrylonitrile-Butadiene-Styrene) resin, polylactic acid (PLA, Poly Lactic Acid) resin, thermoplastic polyurethane (TPU, Thermoplastic Polyurethane) resin, polypropylene (PP, Polypropylene) resin, polyethylene (PE, Polyethylene) resin, polycarbonate (PC, Polycarbonate) resin, polyethylene terephthalate (PET, Polyethyleneterephthalate) resin, nylon (Nylon) resin, silicone resin, polydimethylsiloxane (PDMS, Polydimethylsiloxane) resin, nitrile-butadiene rubber (NBR) resin, carboxylated NBR (X-NBR) resin, isoprene resin, chloroprene resin, butyl rubber resin, fluororubber resin, urethane resin, styrene butadiene rubber (SBR) resin, ceramic; metal; Or it may include one selected from the group consisting of a composite resin containing wood and combinations thereof.

The low melting point alloy is an alloy having a melting point of less than 235° C., for example, selected from the group consisting of bismuth (Bi), tin (Sn), lead (Pb), indium (In), cadmium (Cd), and combinations thereof. It may be an alloy containing one.

By applying the above type of material to the second structural member 21, high process efficiency can be secured in manufacturing the second structural member using the 3D printing method in the manufacturing process of the tensor-grity composite material to be described later, Structural compatibility with the first structural member 11 may be excellent. In one embodiment, the second structural member 21 may include polylactic acid (PLA) resin. In one embodiment, the second structural member 21 may not include magnetic particles.

The tensor grit structure composite 100 has a characteristic in which the first structure 10 and the second structure 20 are combined and a tensile motion is possible. Specifically, an end point at which the first structural members 11 are connected to each other, an end point at which the second structural members 21 are connected to each other, and an end point at which the first structural member 11 and the second structural member 21 are connected. It may be possible to contract or tension at the same time while maintaining the connected state of the As each of the first structural member 11 and the second structural member 21 is made of a material having a predetermined elasticity and flexibility, such motion characteristics may be exhibited, and as a result, the tensor grit structure composite 100 can be applied to the motor domains of muscles and skeletons in biomimetic systems.

In one embodiment, the tensor grit structure composite 100 may be capable of tensile or contractile motion by applying a predetermined magnetic field. For example, the magnetic field for magnetic actuation of the tensor grit structure composite 100 may be a magnetic field in the range of 50 mT to 400 mT. This may be possible because the first structural member 11 includes magnetic particles, but more specifically, the first resin and each type of magnetic particles and their appropriate content ratios are used to simulate biomimetic under the conditions of applying a magnetic field in the above range. A kinetic displacement suitable for the system can be implemented.

2 is an arrow showing the direction of movement of the tensor grit structure composite 100 according to an embodiment. The maximum displacement in tensile motion in one direction of the tensor grit structure composite material may be greater than the maximum displacement in tensile motion in a direction perpendicular to the one direction. In one embodiment, the first structure 10 of the tensor grit structure composite 100 may be a cylindrical structure. In this case, in the kinetic displacement of the tensor grit structure composite material 100 , the maximum tensile displacement in the height direction of the cylinder may be greater than the maximum tensile displacement in the radial direction of the cylinder. The 'maximum displacement in tensile motion' refers to a displacement in which the tensor grit structure composite material can be moved to the maximum without further stretching or shrinking without breaking or breaking. Referring to FIG. 2 , the height direction of the cylinder means the Z-axis direction, and the diameter direction of the cylinder means the X-axis or Y-axis direction. In the first structure 10 and the second structure 20 , an extension direction of the interconnection of the plurality of first structural members 11 corresponds to a height direction of the cylinder, and the second structural member 21 ) and the extension direction of the connection of the first structural member 11 corresponds to the radial direction of the cylinder. As such, the second structural member 11 and the second structural member 11 and the second structural member 21 are arranged in an arrangement that is closer to vertical than horizontal to each other. The structure provides structural rigidity in the radial direction of the cylinder, and as a result, the kinetic displacement due to the elasticity of the first structure may appear larger in the height direction of the cylinder. Such tensile kinetic properties may give a great advantage to the tensor grit structure composite 100 being used as a skeletal and muscle mimic structure in a biomimetic system.

Each of the first structural member 11 and the second structural member 21 is a rod shape having a predetermined aspect ratio, and each of the first structural member 11 and the second structural member 21 is The diameter of the cross section perpendicular to the longitudinal direction may be 300 μm to 30 mm, for example, 500 μm to 3 mm, for example, 1 mm to 3 mm.

For each of the first structural member 11 and the second structural member 21 , an aspect ratio defined as a length to a diameter may be about 5:1 to about 100:1. In this case, the diameter means a cross-sectional diameter in a direction perpendicular to the longitudinal direction.

The cross-sectional diameter and aspect ratio of the first structural member 11 and the second structural member 21 both satisfy the above ranges, so that the tensile motion by magnetic application of the tensorgrity structural composite is easy to apply to a biomimetic system. It can be implemented at one level.

In one embodiment, the first structure 10 may be a cylindrical structure, and based on the diameter of 30 mm and the height of 50 mm of the cylindrical shape of the first structure 10, the first structural member 11 is 6 to 240 may be included, and 3 to 60 second structural members 21 may be included. The diameter of the cylindrical shape means a diameter of a cross section perpendicular to the height direction. For example, 40 to 120, for example, 50 to 110, for example, 60 to 100 of the first structural members 11 may be included in the region, and the second structural member 11 may be included in the region. (21) 10 to 30, for example, 10 to 25 may be included. The first structural member 11 and the second structural member 21 are simultaneously used in the above range, so that flexibility for tensile motion and rigidity for support performance of the tensorgrity structural composite 100 are simultaneously aimed level can be implemented.

3 illustrates shapes of tensor grit structure composites 200 , 300 , 400 , and 500 according to another embodiment. Referring to FIG. 3 , the tensor grit structure composite materials 200 , 300 , 400 , and 500 include a plurality of first structural members 211 , 311 , 411 , and 511 , and the plurality of first structural members ( a first structure (210, 310, 410, 510) which is a three-dimensional structure in which the endpoints of 211, 311, 411, and 511 are directly connected to each other; and a plurality of second structural members (221, 321, 421, 521) having endpoints directly connected to at least some of the endpoints of the first structural members (211, 311, 411, 511); and second structures 220 , 320 , 420 and 520 of a three-dimensional network structure in which the plurality of second structural members 221 , 321 , 421 , and 521 are arranged not to be directly connected to each other. Referring to FIG. 3 , the first structure of the tensor grit structure composite material 200 , 300 , 400 , 500 is an icosahedron type 210 , a hexagonal prism type 310 , a hexahedron type 410 , or a hierarchical type It may have a triangular prismatic shape 510 . In addition, the second structures 220 , 320 , 420 , and 520 are located inside the first structures 210 , 310 , 410 and 510 .

4 illustrates a shape of a tensorgrity structure composite 600 according to another embodiment. Referring to FIG. 4 , the tensor grit structure composite 600 includes a plurality of first structural members 611 , and each end point of the plurality of first structural members 611 is a three-dimensional structure directly connected to each other. a first structure 610; and a plurality of second structural members (621) having endpoints directly connected to endpoints of at least some of the endpoints of the first structural members (611), wherein the plurality of second structural members (621) are connected to each other. and a second structure 620 of a three-dimensional network structure arranged in direct connection. Referring to FIG. 4 , the tensorgrity structure composite 600 includes a plurality of tensorgrity structure units 700 . The tensor grit structure unit 700 includes a tetrahedral first structure unit 710 and a second structure unit 720 connected to the first structure unit 710 . The first structural unit 710 and the second structural unit 720 each include the first structural member and the second structural member.

FIG. 5 illustrates three cases in which the tensorgrity structural unit 700 has the same tensorgrity structural unit 700 as that of the tensorgrity structural composite material 600 of FIG. 4 and the connection structures of the tensorgrity structural units 700 are different. FIG. 5(a) illustrates a case in which the number of coordination numbers of the adjacent tensorgrity structure units 700 is 4, (b) is 5, and (c) is 6, respectively. The coordination number refers to a first structure that is connected to one end point of a second structural member of the second structural unit 720 at a connection portion thereof while the adjacent tensor grit structural units 700 are coupled to each other. means the number of absences.

The tensor grit structure composite material may be manufactured in various shapes as described above according to a manufacturing process to be described later, and may be processed into an appropriate shape according to the use.

The tensor grit structure composite material corresponds to the skeleton and muscle of the biomimetic system by securing tensile and flexural mobility according to the application of a magnetic field and at the same time implementing a certain level of support rigidity through the structural combination of the first structure and the second structure. It is possible to realize an excellent effect to be applied to the structure. Accordingly, the tensor grit structure composite 100 may function as a metamaterial applicable to, for example, a robot system.

In another embodiment, there is provided a method of manufacturing the tensor-grity structural composite, comprising: preparing a mold having a channel and a second structural member corresponding to a desired shape of a first structural member; preparing a composition for forming a first structural member including a first resin and magnetic particles; injecting the composition for forming the first structural member into the flow path of the mold; curing the composition for forming the first structural member injected into the mold; and removing the mold.

According to the manufacturing method of the tensor grit structure composite, it comprises a first structure and a second structure as described above, wherein the first structure comprises a plurality of first structural members, and each endpoint is a three-dimensional structure directly connected to each other, wherein the second structure comprises a plurality of second structural members having endpoints directly connected to at least some of the endpoints of the first structural member, the plurality of A three-dimensional network structure in which the second structural members are not directly connected to each other or are partially directly connected to each other, wherein the second structure is located inside the first structure, and the first structural member includes a first resin and a magnetic Tensorgrity structure composites including particles can be prepared.

6 schematically shows a sequence of a method for manufacturing the tensorgrity structure composite according to an embodiment. Referring to FIG. 6 , in the step (a) of preparing the mold, the mold 101 includes a flow path 111 corresponding to a desired shape of the first structural member and a second structural member 121 . In addition, a base material 131 in an area excluding the flow path 111 and the second structural member 121 is included in the mold 101 . The second structural member 121 is a part of the mold 101 , and is manufactured in a state of being disposed at a final position in the tensor-grity structural composite material during the manufacturing process of the mold 101 .

In one embodiment, the mold may be manufactured by a 3D printing method. Specifically, the mold may be manufactured using a 3D printer having two print cores. That is, after the raw material for forming the second structural member 121 and the raw material for forming the base material 131 are respectively injected through separate injection nozzles, the desired shape of the first structural member is transferred to the flow path 111 . At the same time as printing, 3D printing may be performed so that the second structural member 121 is printed in a desired shape.

The raw material for forming the second structural member may include a second resin, a low melting point alloy (LMPA), or a combination thereof. Matters relating to the second resin and the low melting point alloy are the same as described above.

The diameter of the injection nozzle for injecting the raw material for forming the second structural member is not particularly limited, but may be, for example, about 0.1 mm to about 1 mm, for example, about 0.1 mm to about 0.8 mm, and , for example, may be from about 0.1 mm to about 0.5 mm, for example, from about 0.1 mm to about 0.4 mm, for example, from about 0.1 mm to about 0.3 mm.

In one embodiment, the raw material for forming the second structural member includes a filament-type polylactic acid (PLA) resin having a diameter of about 1 mm to about 3 mm as the second resin, and at the same time injecting the composition for forming the second structural member The injection nozzle of the 3D printer may have a diameter of about 0.1 mm to about 1 mm. Accordingly, the shape of the second structure including the second structure member may be uniformly printed in the mold.

The raw material for forming the base material may include a thermoplastic resin. The thermoplastic resin may be used without limitation as long as it is a resin that is cured by heat and is dissolved under a predetermined condition, for example, polyvinyl alcohol (PVA, Polyvinyl Alcohol) resin, butene-diol vinyl alcohol (BVOH, Butene-diol vinyl alcohol) , polyacrylic acid (PAA, Polyacrylic acid), polyacrylamide (PAM, Polyacryl amid), polyethylene glycol (PEG, Polyethylene glycol), polyvinyl pyrrolidone (PVP, Polyvinyl pyrrolidone), polyethylene oxide (PEO, Polyethylene oxide), It may include one selected from the group consisting of polypropylene (PP, Polypropylene) resin, polyvinylidene chloride (PVDC, Polyvinylidene Chloride), acrylonitrile-butadiene-styrene (ABS, Acrylonitrile-Butadiene-Styrene) and combinations thereof. have.

The diameter of the injection nozzle for injecting the raw material for forming the base material is not particularly limited, but may be, for example, about 0.1 mm to about 1 mm, for example, about 0.1 mm to about 0.8 mm, For example, it may be from about 0.3 mm to about 0.8 mm, for example, it may be greater than about 0.3 mm and less than or equal to about 0.6 mm.

In one embodiment, the raw material for forming the base material includes a filament-type polyvinyl alcohol (PVA) resin having a diameter of about 1 mm to about 3 mm, and the diameter of a nozzle for injecting the raw material for forming the base material in a 3D printer It may be greater than about 0.3 mm and less than or equal to about 0.6 mm. Accordingly, a channel having a shape corresponding to the target shape of the first structural member may be uniformly printed in the mold.

Referring to FIG. 6 , the manufacturing method includes a step (b) of preparing a composition 202 for forming a first structural member including a first resin 212 and magnetic particles 222 . The first resin 212 and the magnetic particles 222 are the same as those described above with respect to the tensor grit structure composite material.

The composition 202 for forming the first structural member is in a liquid form, and may have a viscosity at room temperature of about 1 cps to about 30,000 cps, for example, about 1 cps to about 15,000 cps, for example, about It may be 1 cps to about 10,000 cps. By having such a viscosity range, it is input into the channel in the mold to form a homogeneous first structure without voids.

The preparing of the composition for forming the first structural member may include removing a mixture of the first resin and the magnetic particles; and degassing the mixture. The degassing may be performed by placing the mixture in a vacuum at room temperature. Through the degassing process, the composition for forming the first structural member may be injected into a channel in the mold to form a homogeneous first structure without voids.

The manufacturing method includes the step (c) of injecting the composition 202 for forming the first structural member into the flow path 111 of the mold 101 . The flow path 111 of the mold 101 is an empty space formed to correspond to a desired final shape of the first structural member. Accordingly, the first structural member having a desired shape can be manufactured by injecting and curing the composition for forming the first structural member therein.

The composition for forming the first structural member may be injected into the mold at an injection rate of about 0.06 L/min to about 0.6 L/min. In one embodiment, the viscosity of the composition for forming the first structural member is in the above-described range under room temperature conditions, and at the same time, the first structure may be uniformly formed by injecting it into the mold at an injection rate of the range.

The manufacturing method includes a step (d) of curing the composition for forming the first structural member injected into the mold 101 . The curing may be performed on a hot-plate (303).

The curing conditions may be appropriately set depending on the type of the first resin, but for example, the first resin includes a silicone resin or a polydimethylsiloxane (PDMS) resin, and the curing is performed at about 25°C to about 100°C. °C, e.g., from about 25 °C to about 80 °C, such as from about 50 °C to about 100 °C, such as from about 60 °C to about 90 °C for about 0.5 hours to about 10 hours, e.g. For example, from about 1 hour to about 10 hours, such as from about 1 hour to about 8 hours, such as from about 4 hours to about 8 hours, such as from about 5 hours to about 8 hours. . Accordingly, it is possible to prevent damage to the pre-mounted second structural member or the like during the curing process, and the hardened first structural member is not broken even after a certain level of elongation while securing flexibility for tensile movement by applying a magnetic field. It may be advantageous to secure rigidity that does not

The manufacturing method includes the step (e) of removing the mold. The step of removing the mold is a step of removing a portion of the base material 131 excluding the second structural member from the mold, and an appropriate method may be selected according to the material of the base material 131 . In one embodiment, the base material 131 may include polyvinyl alcohol (PVA) resin, and in this case, the removal of the mold is about 15 to about 15 °C in the underwater chamber 404 at a temperature of about 10 °C to about 80 °C. It may be carried out by a method of immersion for hours to about 30 hours.

The tensor grit structure composite 100 including a first structure including a plurality of first structural members and a second structure including a plurality of second structural members may be manufactured by removing the base material in the mold.

Hereinafter, specific embodiments of the present invention are presented. However, the examples described below are only for specifically illustrating or explaining the present invention, and the present invention is not limited thereto.

<Production Example>

Preparation Example 1: Preparation of a mold

A 3D modeling tool (3DS MAX, AUTODESK Inc.) was used to design the structure of the mold, and an open source slicing engine (Ultimaker Cura, Ultimaker BV) was used to convert a stereo skeleton (STL) file of the mold to G-cord format. . The 3D printer (Ultimaker 3, Ultimaker BV) for making molds has a core AA with a 0.25 mm diameter nozzle for a 2.85 mm diameter polylactic acid (PLA, Ultimaker BV) filament and a 2.85 mm diameter polyvinyl alcohol (PVA, Ultimaker BV) BV) was a double nozzle printer with a core BB with a 0.40 mm diameter nozzle for the filament. Using a preset profile (“Fine-0.1mm”, layer height resolution 0.1mm, line width 0.23mm) was injected at 10% injection density for PVA and under default printing temperature conditions of 190°C for PLA. Thus, a mold including the second structural member made of PLA resin and filled in the area other than the PVA was manufactured so that the target shape of the first structural member was set as an empty space (Channel).

Example 1: Shape deformation for mechanically anisotropic design of tensorgrity structures

Example 1-1: Cylindrical

In Preparation Example 1, a channel is designed such that the first structural member has the same cylindrical shape as the first structure of FIG. 1, and the second structure has a connection point as shown in FIG. 1 with the first structure. A mold in which the second structural member was disposed was prepared.

A polydimethylsiloxane (PDMS) resin (Dow Corning, Sylgard 184) and a silicone resin (Ecoflex 00-30) were prepared, and a resin mixture was prepared by mixing the PDMS resin to the silicone resin in a weight ratio of 2:8. A composition for forming a first structural member was prepared by mixing magnetic particles (Fe3O4, Sigama Aldrich, 310069) in an amount of 30 parts by weight based on 100 parts by weight of the total weight of the magnetic particle and resin mixture. The composition for forming the first structural member was stored in a vacuum oven for 5 minutes, degassed, and injected into a channel in the mold using an injection device (A NORM-JECT syringe, Henke Sass Wolf). The mold, in which the injection of the composition for forming the first structural member was completed, was wrapped in aluminum foil and cured at 80° C. for 6 hours.

Then, the mold was stored in a water chamber for 24 hours to dissolve the PVA region to prepare a tensor grit structure composite having a cylindrical first structure and a second structure as shown in FIG. 1 .

Example 1-2: icosahedral shape

In Preparation Example 1, a channel is designed such that the first structural member has an icosahedral shape such as the first structure of the tensor grit structure composite 200 of FIG. 3A, and the second structure A mold was prepared in which the second structural member was disposed so that the first structure had the same connection point as the tensor grit structure composite 200 of FIG. 3A . Except for using such a mold, the tensor grit structure composite 200 of FIG. 3A was prepared in the same manner as in Example 1-1.

Example 1-3: Hexagonal prism type

In Preparation Example 1, a channel is designed such that the first structural member has the same hexagonal prism shape as the first structure of the tensor grit structure composite 300 of FIG. 3A, and the second A mold in which the second structural member is disposed was prepared so that the structure had the same connection point as the first structure and the tensor-grity structure composite 300 of FIG. 3A . Except for using the mold, the tensor grit structure composite 300 of FIG. 3A was prepared in the same manner as in Example 1-1.

Example 1-4: hexahedron

In Preparation Example 1, a channel is designed such that the first structural member has the same hexahedral shape as the first structure of the tensor grit structure composite 400 of FIG. 3A, and the second structure A mold in which the second structural member is disposed was prepared so that the first structure had the same connection point as the tensor grit structure composite 400 of FIG. 3A . Except for using such a mold, the tensor grit structure composite 400 of FIG. 3A was prepared in the same manner as in Example 1-1.

Example 1-5: Hierarchical Triangular Prism

In Preparation Example 1, a channel is designed such that the first structural member has the same hierarchical triangular prismatic shape as the first structure of the tensor grit structure composite 500 of FIG. A mold in which the second structural member is disposed was prepared so that the second structure had the same connection point as the first structure and the tensor-grity structure composite 500 of FIG. 3A . Except for using such a mold, the tensor grit structure composite 300 of FIG. 3A was prepared in the same manner as in Example 1-1.

Example 2: Change in kinetic displacement by applying a magnetic field according to a resin material

Example 2-1

In Preparation Example 1, a channel is designed such that the first structural member has an icosahedral shape like the first structure of the tensor grit structure composite 200 of FIG. 3A, and the polylactic acid ( PLA) using the polydimethylsiloxane (PDMS) resin instead of the resin to prepare a second structural member, wherein the second structure includes the first structure and the tensor grit structure composite 200 of FIG. 3 (a) A mold in which the second structural member is disposed was prepared so as to have a connection point as shown in FIG.

To 100 parts by weight of the total weight of the magnetic particles and polydimethylsiloxane (PDMS) resin (Dow Corning, Sylgard 184), 30 parts by weight of magnetic particles (Fe3O4, Sigama Aldrich, 310069) were mixed to prepare a composition for forming a first structural member. prepared. The composition for forming the first structural member was stored in a vacuum oven for 5 minutes, degassed, and injected into a channel in the mold using an injection device (A NORM-JECT syringe, Henke Sass Wolf). The mold, in which the injection of the composition for forming the first structural member was completed, was wrapped in aluminum foil and cured at 80° C. for 6 hours.

Then, the mold was stored in a water chamber for 24 hours to dissolve the PVA region to prepare a tensor grit structure composite having an icosahedral first structure and a second structure as shown in FIG. . Both the first structure and the second structure include a PDMS resin.

Example 2-2

In Preparation Example 1, a channel is designed such that the first structural member has an icosahedral shape like the first structure of the tensor grit structure composite 200 of FIG. 3A, and the polylactic acid ( PLA) using a resin to manufacture a second structural member, wherein the second structural member has the same connection point as the first structural member and the tensor-grity structural composite 200 of FIG. 3A A mold in which was placed was prepared.

A composition for forming a first structural member was prepared so that 30 parts by weight of magnetic particles (Fe3O4, Sigama Aldrich, 310069) were mixed with respect to 100 parts by weight of the total weight of the magnetic particles and the polydimethylsiloxane (PDMS) resin (Dow Corning, Sylgard 184). did. The composition for forming the first structural member was stored in a vacuum oven for 5 minutes, degassed, and injected into a channel in the mold using an injection device (A NORM-JECT syringe, Henke Sass Wolf). The mold, in which the injection of the composition for forming the first structural member was completed, was wrapped in aluminum foil and cured at 80° C. for 6 hours.

Then, the mold was stored in a water chamber for 24 hours to dissolve the PVA region to prepare a tensor grit structure composite having an icosahedral first structure and a second structure as shown in FIG. 7(b). . The first structure includes a PDMS resin, and the second structure includes all of the PLA resin.

Example 2-3

In the same manner as in Example 1-2, a tensor grit structure composite having an icosahedral first structure and a second structure as shown in FIG. 7(c) was prepared. The first structure includes a resin mixture in which a silicone resin to a PDMS resin is mixed in a weight ratio of 5:5, and the second structure includes a PLA resin.

Example 2-4

With respect to 100 parts by weight of the total weight of magnetic particles and silicone resin (Ecoflex 00-30), magnetic particles (Fe3O4, Sigama Aldrich, 310069) were mixed so as to be 30 parts by weight to prepare and apply a composition for forming the first structural member , A tensor grit structure composite material having an icosahedral first structure and a second structure as shown in FIG. 7(d) was prepared in the same manner as in Example 2-2. The first structure includes a silicone resin, and the second structure includes a PLA resin.

Example 2-5

In Preparation Example 1, a channel is designed such that the first structural member has an icosahedral shape like the first structure of the tensor grit structure composite 200 of FIG. 3A, and the polylactic acid ( PLA) a second structural member is manufactured using the silicone resin (Ecoflex 00-30) instead of the resin, wherein the second structure is the first structure and the tensor grit structure composite 200 of FIG. 3A ), a mold in which the second structural member is disposed to have the same connection point was prepared.

Except for using such a mold, a tensor grit structure composite material having an icosahedral first structure and a second structure as shown in FIG. 7(e) was prepared in the same manner as in Example 2-4. Both the first structure and the second structure include a silicone resin (Ecoflex 00-30).

Example 3: Change in kinetic displacement by applying a magnetic field according to a magnetic material

Example 3-1

In Example 1-2, with respect to 95 parts by weight of the resin mixture obtained by mixing the PDMS resin and the silicone resin in a weight ratio of 2:8, 5 parts by weight of magnetic particles (Fe3O4, Sigama Aldrich, 310069) were mixed. 1 A tensor grit structure composite including the first icosahedral structure was prepared in the same manner except that the composition for forming a structural member was prepared.

Example 3-2

With respect to 90 parts by weight of the resin mixture, 10 parts by weight of magnetic particles (Fe ₃ O ₄ , Sigama Aldrich, 310069) were mixed to prepare a composition for forming the first structural member. A tensor grit structure composite including a tetrahedral first structure was prepared.

Example 3-3

With respect to 85 parts by weight of the resin mixture, 15 parts by weight of magnetic particles (Fe ₃ O ₄ , Sigama Aldrich, 310069) were mixed to prepare a composition for forming the first structural member 20 in the same manner as in 3-1. A tensor grit structure composite including a tetrahedral first structure was prepared.

Example 3-4

With respect to 80 parts by weight of the resin mixture, 20 parts by weight of magnetic particles (Fe ₃ O ₄ , Sigama Aldrich, 310069) were mixed to prepare a composition for forming the first structural member. A tensor grit structure composite including a tetrahedral first structure was prepared.

Example 3-5

With respect to 75 parts by weight of the resin mixture, 25 parts by weight of magnetic particles (Fe ₃ O ₄ , Sigama Aldrich, 310069) were mixed to prepare a composition for forming the first structural member 20 in the same manner as in 3-1 above. A tensor grit structure composite including a tetrahedral first structure was prepared.

Example 3-6

With respect to 70 parts by weight of the resin mixture, 30 parts by weight of magnetic particles (Fe ₃ O ₄ , Sigama Aldrich, 310069) were mixed to prepare a composition for forming the first structural member 20 in the same manner as in 3-1. A tensor grit structure composite including a tetrahedral first structure was prepared.

Example 4: Linear Composite by Combination of Tensorgrity Structural Units

Example 4-1

In Preparation Example 1, six tensor grity structural units including a tetrahedral-shaped first structure are linearly connected as shown in the tensor grit complex structure of FIG. The shape of the channel for the first structural member is designed to achieve A mold in which the second structural member is disposed was prepared to form a shape that also exists. The coordination number is defined as the number of first structural members connected to one of two endpoints of a second structural member at a junction of two adjacent units.

A polydimethylsiloxane (PDMS) resin (Dow Corning, Sylgard 184) and a silicone resin (Ecoflex 00-30) were prepared, and a resin mixture was prepared by mixing the PDMS resin to the silicone resin in a weight ratio of 2:8. With respect to 70 parts by weight of the resin mixture, 30 parts by weight of magnetic particles (Fe ₃ O ₄ , Sigama Aldrich, 310069) were mixed to prepare a composition for forming a first structural member. The composition for forming the first structural member was stored in a vacuum oven for 5 minutes, degassed, and injected into a channel in the mold using an injection device (A NORM-JECT syringe, Henke Sass Wolf). The mold, in which the injection of the composition for forming the first structural member was completed, was wrapped in aluminum foil and cured at 80° C. for 6 hours.

Then, the mold was stored in a water chamber for 24 hours to dissolve the PVA region to prepare a linear composite having a tensor grit structure as shown in FIG. 5 (a).

Example 4-2

Like the tensorgrity complex structure of FIG. 5(b), six tensorgrity structural units including a tetrahedral-shaped first structure are linearly connected, and the first A shape of a channel for a structural member is designed, and as shown in FIG. 5B , the second structure and the first structure have interconnection points, and a connection point between the second structural members is also present. A tensor grit structure linear composite having the shape as shown in (b) of FIG. 5 was prepared in the same manner as in Example 4-1, except that a mold in which the second structural member was disposed was used to form .

Example 4-3

Like the tensorgrity complex structure of FIG. 5(c), six tensorgrity structural units including a first structure having a tetrahedral shape are linearly connected, and the first structural member to form a shape having a coordination number of 6. The shape of the channel is designed for, and as shown in FIG. 5(c), the second structure and the first structure have interconnection points, and the connection points between the second structural members also exist. A tensor grit structure linear composite having the shape as shown in FIG. 5(c) was prepared in the same manner as in Example 4-1, except that the mold on which the second structural member was disposed was used.

Example 5: Lattice Composite by Combination of Tensorgrity Structural Units

In Preparation Example 1, a tensor grit structure unit ( 800) is connected in a lattice type, and five tensor grit structural units are connected in each of the horizontal, vertical and height to design a channel for the first structural member for the first structure 910 having a hexahedral shape as a whole, A mold in which the second structural member is disposed was prepared so that the second structure 920 has an interconnection point with the first structure 910 as shown in FIG. 8 .

A polydimethylsiloxane (PDMS) resin (Dow Corning, Sylgard 184) and a silicone resin (Ecoflex 00-30) were prepared, and a resin mixture was prepared by mixing the PDMS resin to the silicone resin in a weight ratio of 2:8. With respect to 70 parts by weight of the resin mixture, 30 parts by weight of magnetic particles (Fe ₃ O ₄ , Sigama Aldrich, 310069) were mixed to prepare a composition for forming a first structural member. The composition for forming the first structural member was stored in a vacuum oven for 5 minutes, degassed, and injected into a channel in the mold using an injection device (A NORM-JECT syringe, Henke Sass Wolf). The mold, in which the injection of the composition for forming the first structural member was completed, was wrapped in aluminum foil and cured at 80° C. for 6 hours.

Then, by dissolving the PVA region by storing the mold in a water chamber for 24 hours, as shown in FIG. 8 , a tensor grating structure composite 900 having a hexahedral lattice shape of 8.9 cm in width, length and height is prepared. did.

<Evaluation>

Experimental Example 1: Evaluation of mechanical anisotropy

Although the tensor grit structure composites of Examples 1-2 to 1-5 have different overall shapes, they consist of a second structure composed of 6 second structural members and a first structure composed of 24 first structural members.

9 (a) to (d) show the directional selectivity of the kinetic displacement according to the magnetic field application of each of the tensor grit structure composites of Examples 1-2 to 1-5. Referring to FIG. 9 , the tensor-grity structure composite of Examples 1-2 and 1-4 has an X-axis magnetic field applied and a Z-axis magnetic field applied when its first structure is an icosahedron and a hexahedron, respectively. Although the difference in kinetic displacement is not large, the tensor-grity structure composite of Examples 1-3 and 1-5 is a case in which the first structure is a hexagonal prism type and a hierarchical triangular prism type, respectively, with respect to the Z-axis direction. It was confirmed that the tensile displacement of the magnetic field application was larger than the tensile displacement of the magnetic field application in the X-axis direction. That is, the tensor grit structure composites of Examples 1-3 and 1-5 have the same material and the same number of first and second structural members as the tensor grit structure composites of Examples 1-2 and 1-4. In the case of using a structural member, it was confirmed that, unlike the tensor grit structure composites of Examples 1-2 and 1-4, mechanical anisotropy was observed due to morphological differences.

Experimental Example 2: Kinetic characteristics according to the connection point of the linear complex

For each of the tensor grit structure composites of Examples 2-1 to 2-5, shape deformation was confirmed by applying a magnetic field of 250 mT as shown in FIG. 7 . 7 (a) to (e) show the modified results of Examples 2-1 to 2-5, respectively. When referring to that the intrinsic elastic modulus of the PDMS resin is 2420 KPa and the elastic modulus of the silicone resin is 140 KPa, both the first structure and the second structure use only the silicone resin as the matrix resin It could be confirmed that the tensor grit structure composite of Example 2-5 could not maintain its shape before the magnetic field was applied, and it was confirmed that the shape was completely destroyed after the magnetic field was applied. On the other hand, it was confirmed that the tensor grit structure composite of Example 2-1 using the PDMS resin as the matrix resin of the first structure and the second structure showed only about 28% shape deformation even by the application of a magnetic field. . The shape deformation degree is expressed as a percentage of the degree of change in the height (Hf) of the tensor-grity-structured composite after the magnetic field is applied to the height (Hi) of the tensor-grity-structured composite before the magnetic field is applied as shown in Equation 1 below.

[Equation 1]

Shape strain (%) = (Hi - Hf)/Hi x 100

Further, while applying the PLA resin as the second structure, Example 2-2 in which PDMS resin, a mixed resin of PDMS resin and silicone resin (weight ratio of 5:5) and silicone resin are applied as the mattress resin of the first structure, respectively, In the case of 2-3 and 2-4, it was confirmed that the magnetic field stimulus-response corresponding to the aforementioned tendency of the elastic modulus was exhibited.

That is, in the case of Examples 2-2 to 2-4, about 30% to about 80%, for example, about 30% to about 60% of shape deformation was shown.

Experimental Example 3: Magnetic field stimulation-response evaluation according to magnetic particle content

10 is a graph showing magnetic field stimulation-response evaluation results according to the content of magnetic particles of Examples 3-1 to 3-6. The tensor grit structure composite of Examples 3-1 to 3-6 is applied to the first structure and the second structure to which the matrix resin of the same material is applied, respectively, in the same number and in the same shape, and the magnetic particles in the first structure The content was increased to 5, 10, 15, 20, 25, 30 parts by weight based on 100 parts by weight of the total weight of the magnetic particles and the resin. At this time, it was confirmed that the degree of shape deformation according to Equation 1 increased as the content of magnetic particles increased. That is, it was confirmed that the degree of stimuli response can be adjusted according to the content of magnetic particles even though the shape is the same.

Experimental Example 4: Kinetic properties according to the connection point of the linear composite

11 (a) to (c) are photographs showing tensile motion by applying a magnetic field to the tensor grit structure composites of Examples 4-1 to 4-3, respectively, and FIGS. 12 (a) to (c) c) shows photographs of bending motion by applying a magnetic field to the tensor grit structure composites of Examples 4-1 to 4-3, respectively. 11 and 12 , it can be seen that as the number of connection points of the tensor grit structural units increases, the structural rigidity increases, so that the tensile displacement and the flexural displacement are reduced.

Experimental Example 5: Kinetic properties of lattice-type composites

13 shows the motion characteristics when an external stimulus is applied to the lattice-type tensor grit structure composite of Example 5. FIG. More specifically, FIG. 13 is a side view when no stress (a), compressive stress (b), X-axis shear stress (c), X-axis and Y-axis shear stress (d), and torsional stress (e) are applied ) and the deformation observed from the top are shown in photographs. Referring to FIG. 13 , it was confirmed that the lattice-type tensor grit structure composite material had a certain degree of stiffness with respect to compressive stress, but exhibited large deformation with respect to shear stress and torsional stress.

100, 200, 300, 400, 500, 600, 900: Tensorgrity Structural Composites
10, 210, 310, 410, 510, 610, 910: first structure
11, 211, 311, 411, 511, 611: first structural member
20, 220, 320, 420, 520, 620, 920: second structure
21, 221, 321, 421, 521, 621: second structural member
700, 800: Tensorgrity structure unit
710, 810: first structure unit
720, 820: second structure unit
101: mold
111: Euro
121: second structural member
131: base material
202: composition for forming a first structural member
212: first resin
222: magnetic particles
303: hot-plate
404: underwater chamber

Claims (11)

a first structure and a second structure;
The first structure is a three-dimensional network structure including a plurality of first structural members, and each end point of the plurality of first structural members is directly connected to each other,
wherein the second structure comprises a plurality of second structural members having endpoints directly connected to endpoints of at least some of the endpoints of the first structural members, wherein the plurality of second structural members are not directly connected to each other; It is a three-dimensional structure that is partially directly connected to each other and arranged.
The second structure is located inside the first structure,
The first structural member includes a first resin and magnetic particles,
The second structural member will include a second resin, a low melting point alloy (LMPA, Low Melting Point Alloy) or a combination thereof,
Tensorgrity structural composites.
According to claim 1,
The first resin is a silicone resin, a polydimethylsiloxane (PDMS) resin, an epoxy resin, a gel resin, a Teflon resin, a fluorinated silicone (FKM) resin, a polyacrylic rubber resin, and these resins. comprising one selected from the group consisting of a combination of
Tensorgrity structural composites.
According to claim 1,
The magnetic particles include pure iron, iron oxide (Fe3O4), Nd-Fe-B alloy, nickel, cobalt, Fe-Nd alloy, Fe-Si alloy, Fe-Al alloy, Fe-Si-Al alloy, Ni-Zn ferrite, Cu -Zn ferrite, including one selected from the group consisting of Mn-Zn ferrite and combinations thereof,
Tensorgrity structural composites.
delete According to claim 1,
The second resin is acrylonitrile-butadiene-styrene (ABS, Acrylonitrile-Butadiene-Styrene) resin, polylactic acid (PLA, Poly Lactic Acid) resin, thermoplastic polyurethane (TPU, Thermoplastic Polyurethane) resin, polypropylene (PP, Polypropylene) resin, polyethylene (PE, Polyethylene) resin, polycarbonate (PC, Polycarbonate) resin, polyethylene terephthalate (PET, Polyethyleneterephthalate) resin, nylon (Nylon) resin, silicone resin, polydimethylsiloxane (PDMS, Polydimethylsiloxane) resin, nitrile-butadiene rubber (NBR) resin, carboxylated NBR (X-NBR) resin, isoprene resin, chloroprene resin, butyl rubber resin, fluororubber resin, urethane resin, styrene butadiene rubber (SBR) resin, ceramic; metal; Or comprising one selected from the group consisting of composite resins containing wood and combinations thereof,
Tensorgrity structural composites.
According to claim 1,
The first structure and the second structure may include an end point at which the plurality of first structure members are connected to each other; an end point at which the plurality of second structural members are connected to each other; and a state in which the first structural member and the second structural member maintain an end point connected to each other and simultaneously perform a tensile or contractile motion.
Tensorgrity structural composites.
7. The method of claim 6,
By applying a magnetic field, the tension or contraction movement is possible,
Tensorgrity structural composites.
According to claim 1,
The first structural member and the second structural member have a cross-sectional diameter perpendicular to each longitudinal direction of 300㎛ to 30mm,
Tensorgrity structural composites.
According to claim 1,
The first structure is a cylindrical structure,
Based on a diameter of 30 mm and a height of 50 mm of the first structure, 6 to 240 of the first structural members are included, and 3 to 60 of the second structural members are included
Tensorgrity structural composites.
preparing a mold having a flow path corresponding to a desired shape of the first structural member and a second structural member;
preparing a composition for forming a first structural member including a first resin and magnetic particles;
injecting the composition for forming the first structural member into the flow path of the mold;
curing the composition for forming the first structural member injected into the mold; and
removing the mold;
A method for manufacturing a tensorgrity structural composite.
11. The method of claim 10,
The mold is manufactured by a 3D printing method,
A method for manufacturing a tensorgrity structural composite.

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