Macromolecule-based composite bar with directionally arranged metal wires and preparation method of polymer-based composite bar

Abstract

The invention belongs to the technical field of preparation of composite bars, and provides a polymer-based composite bar with directionally arranged metal wires and a preparation method of the polymer-based composite bar. The method comprises the following steps: fully mixing a high polymer material and an organic solvent to obtain a high polymer solution; putting the bracket on which the alloy wire is fixed into a mold to obtain a mold containing the alloy wire; the polymer solution is poured into a mold containing an alloy wire, standing and drying are sequentially carried out, and a composite sheet is obtained; and the composite sheet is subjected to cutting, lamination and hot press molding in sequence, and the polymer-based composite bar with the directionally-arranged metal wires is obtained. The preparation method is simple in process and high in practicability, the polymer-based composite bar with directionally-arranged metal wires can be prepared according to the preparation method, the uniformity and performance consistency of the composite material are kept, the size and position of the metal wires and the proportion of the composite material are easy to regulate and control, and then the performance of the composite material is easy to regulate and control; and the method can better adapt to various application requirements.

Description

Technical Field

[0001] The invention relates to the technical field of composite rod preparation, and in particular to a polymer-based composite rod with directional arrangement of metal wires and a preparation method thereof. Background Art

[0002] The existing methods for preparing polymer-based composite rods mainly have the following problems: First, the distribution of metal wires is uneven: When the metal wires are embedded in the polymer matrix in the traditional methods for preparing composite rods, it is often difficult to achieve precise directional arrangement, and due to process limitations or operational complexity, the distribution of metal wires is usually uneven, resulting in an unstable internal structure of the composite material and poor performance consistency, which affects the mechanical properties and durability of the material and limits its application in areas with high precision and high strength requirements. Second, the limitations of performance regulation: The existing technology has great limitations in the regulation of composite material performance. Due to the limited means of controlling material composition, structural design and process parameters, it is difficult to effectively improve or optimize the specific properties of the composite rods, and it is not possible to adapt well to diverse application requirements. Therefore, it is of great significance to provide a polymer-based composite rod with directional arrangement of metal wires so that it can better adapt to a variety of application requirements. Summary of the invention

[0003] The purpose of the present invention is to overcome the problems existing in the prior art and to provide a polymer-based composite rod with directional arrangement of metal wires and a preparation method thereof.

[0004] In order to achieve the above-mentioned object of the invention, the present invention provides the following technical solutions:

[0005] The present invention provides a method for preparing a polymer-based composite rod with oriented metal wires, comprising the following steps:

[0006] (1) mixing a polymer material and an organic solvent to obtain a polymer solution; placing a stent with an alloy wire fixed thereon into a mold to obtain a mold containing the alloy wire; pouring the polymer solution into the mold containing the alloy wire, and sequentially allowing the mixture to stand and dry to obtain a composite sheet;

[0007] (2) The composite sheets are cut, laminated and hot-pressed in sequence to obtain the polymer-based composite rod with directional arrangement of metal wires.

[0008] Preferably, the polymer material in step (1) includes polylactic acid or polycaprolactone; and the organic solvent includes dichloromethane or chloroform.

[0009] Preferably, the mass volume ratio of the polymer material and the organic solvent in step (1) is 0.08-0.125 g:1 mL.

[0010] Preferably, the polymer solution in step (1) further comprises a functional additive; the functional additive comprises magnesium powder.

[0011] Preferably, the standing time in step (1) is 10 to 36 hours, the drying temperature is 55 to 65° C., and the drying time is 5 to 7 hours.

[0012] Preferably, the pouring thickness in step (1) is 0.2 to 2.5 mm.

[0013] Preferably, the hot pressing molding in step (2) comprises the following steps: (a) pre-pressing for 3 to 7 minutes at a temperature below the melting temperature of the polymer material and above the glass transition temperature; (b) hot pressing for 13 to 17 minutes at a temperature 5 to 15°C above the melting temperature of the polymer material; and (c) releasing the pressure at a temperature below the melting temperature of the polymer material and above the glass transition temperature.

[0014] Preferably, the pressure of the hot pressing molding in step (2) is 2 to 5 MPa;

[0015] The arrangement of the alloy wires in the polymer-based composite rod with directional arrangement of the metal wires in step (2) is equidistant parallel arrangement or concentric parallel arrangement.

[0016] The present invention also provides the polymer-based composite rod with oriented metal wires prepared by the method for preparing the polymer-based composite rod with oriented metal wires.

[0017] The beneficial effects of the present invention are:

[0018] The present invention provides a method for preparing a polymer-based composite rod with directional arrangement of metal wires, comprising the following steps: mixing a polymer material and an organic solvent to obtain a polymer solution; placing a bracket fixed with an alloy wire into a mold to obtain a mold containing the alloy wire; pouring the polymer solution into the mold containing the alloy wire, and sequentially standing and drying to obtain a composite sheet; sequentially cutting, laminating and hot-pressing the composite sheet to obtain a polymer-based composite rod with directional arrangement of metal wires. The present invention has a simple process and strong practicality. According to the preparation method provided by the present invention, a polymer-based composite rod with directional arrangement of metal wires can be prepared, the uniformity and performance consistency of the composite material are maintained, and the size and position of the metal wire and the proportion of the composite material are easy to control, thereby making it easy to control the performance of the composite material, so that it can better adapt to various application requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the preparation process of the polymer-based composite rod with directional arrangement of metal wires in the present invention;

[0020] Figure 2This is a schematic diagram of the preparation process of the polymer-based composite rod with directional arrangement of metal wires in Example 1;

[0021] Figure 3 Schematic diagram of the preparation process of the polymer-based composite rod with directional arrangement of metal wires in Example 4;

[0022] Figure 4 Schematic diagram of the preparation process of the polymer-based composite rod with directional arrangement of metal wires in Examples 7 to 9;

[0023] Figure 5 Schematic diagram of the structure of the composite rod in Comparative Example 1. DETAILED DESCRIPTION

[0024] The present invention provides a method for preparing a polymer-based composite rod with oriented metal wires, comprising the following steps:

[0025] (1) mixing a polymer material and an organic solvent to obtain a polymer solution; placing a stent with an alloy wire fixed thereon into a mold to obtain a mold containing the alloy wire; pouring the polymer solution into the mold containing the alloy wire, and sequentially allowing the mixture to stand and dry to obtain a composite sheet;

[0026] (2) The composite sheets are cut, laminated and hot-pressed in sequence to obtain the polymer-based composite rod with directional arrangement of metal wires.

[0027] In the present invention, the polymer material in step (1) preferably includes polylactic acid or polycaprolactone; the present invention does not impose any special limitation on the molecular weight of polylactic acid or polycaprolactone, and a conventional selection can be made according to the required performance of the composite rod when used; the organic solvent preferably includes dichloromethane or chloroform, and more preferably dichloromethane.

[0028] In the present invention, the mass volume ratio of the polymer material and the organic solvent in step (1) is preferably 0.08-0.125 g:1 mL, more preferably 0.09-0.115 g:1 mL, and more preferably 0.10-0.105 g:1 mL.

[0029] In the present invention, the polymer solution in step (1) preferably also includes a functional additive; the functional additive preferably includes magnesium powder; the addition of magnesium powder can give the polymer material good molding properties and osteogenic properties; the mass ratio of magnesium powder to polymer material is preferably 2.5-3.5:100, more preferably 2.7-3.3:100, and more preferably 3:100.

[0030] In the present invention, in step (1), the alloy wires are fixed on a pre-designed bracket to obtain a bracket with the alloy wires fixed thereon, thereby ensuring the directional arrangement of the alloy wires in subsequent steps.

[0031] In the present invention, in step (1), the alloy wire is preferably a magnesium alloy wire, and the alloy wire is preferably subjected to a fluorination treatment before being fixed. The purpose of the fluorination treatment is to enhance the corrosion resistance of the magnesium alloy wire and slow down the degradation rate of the magnesium alloy wire. The fluorination treatment is carried out by conventional technical means in the art.

[0032] In the present invention, in the pre-designed stent, the size and position of the stent holes are arranged and designed according to the size and position of the required alloy wires, and the number and size of the alloy wires are different to regulate the mechanical properties and degradation cycle of the composite rod.

[0033] In the present invention, in step (1), the mold is preferably a polytetrafluoroethylene mold.

[0034] In the present invention, in step (1), the pouring thickness is preferably 0.2 to 2.5 mm, more preferably 0.5 to 2 mm, and more preferably 1.2 to 1.5 mm; the greater the pouring thickness, the better the bending strength and toughness of the composite sheet, but the pouring thickness should not be too large. If the pouring thickness is too large, the organic solvent will remain inside the polymer matrix, thereby affecting the performance of the composite sheet.

[0035] In the present invention, the standing time in step (1) is preferably 10 to 36 hours, more preferably 18 to 30 hours, and more preferably 24 hours; if the standing time is too long, the efficiency is low; if the standing time is too short, bubbles are easily generated; the drying temperature is preferably 55 to 65°C, more preferably 57 to 63°C, and more preferably 60°C; the drying time is preferably 5 to 7 hours, more preferably 5.5 to 6.5 hours, and more preferably 6 hours.

[0036] In the present invention, the composite sheets obtained in step (1) are cut and stacked in order, and then tightly wrapped with tin foil and then hot-pressed.

[0037] In the present invention, the hot pressing molding in step (2) preferably includes the following steps: (a) pre-pressing for 3 to 7 minutes at a temperature below the melting temperature of the polymer material and above the glass transition temperature; (b) hot pressing for 13 to 17 minutes at a temperature 5 to 15°C above the melting temperature of the polymer material; (c) releasing the pressure at a temperature below the melting temperature of the polymer material and above the glass transition temperature.

[0038] In the present invention, when the polymer material is polylactic acid, taking the molecular weight of polylactic acid as 5w as an example (melting temperature is 165-170°C, glass transition temperature is about 60°C), hot pressing molding preferably includes the following steps: pre-pressing at 145°C for 5 minutes, hot pressing at 175°C for 15 minutes, and decompression at 145°C.

[0039] In the present invention, when the polymer material is polycaprolactone, taking the molecular weight of polycaprolactone as 2w as an example (melting temperature is 59-64°C, glass transition temperature is about -60°C), hot pressing molding preferably includes the following steps: pre-pressing at room temperature for 5 minutes, hot pressing at 75°C for 15 minutes, and decompression at room temperature.

[0040] In the present invention, the pressure of the hot pressing molding in step (2) is preferably 2 to 5 MPa, more preferably 2.5 to 4.5 MPa, and even more preferably 3 to 4 MPa.

[0041] In the present invention, in step (2), air between the gaps of the sheets is removed by pre-pressing under specific conditions to avoid the generation of bubbles in subsequent hot pressing; effective bonding of sheets between different layers is ensured by hot pressing under specific conditions; flatness and performance of the composite material are ensured by unloading under specific conditions; and layer-by-layer bonding of the material and improvement of mechanical properties are ensured by multi-stage hot pressing.

[0042] In the present invention, after the hot pressing forming in step (2) is completed, the hot pressing formed composite sheet is cut by a precision lathe or other mechanical processing equipment to obtain the polymer-based composite rod with directional arrangement of metal wires.

[0043] In the present invention, the arrangement of the alloy wires in the polymer-based composite rod with directional arrangement of the metal wires in step (2) is preferably equidistant parallel arrangement or concentric parallel arrangement.

[0044] The schematic diagram of the preparation process of the polymer-based composite rod with oriented metal wire arrangement in the present invention is as follows: Figure 1 shown.

[0045] The present invention also provides the polymer-based composite rod with directional arrangement of metal wires prepared by the method for preparing the polymer-based composite rod with directional arrangement of metal wires.

[0046] The technical solutions provided by the present invention are described in detail below in conjunction with the embodiments, but they should not be construed as limiting the protection scope of the present invention.

[0047] The magnesium alloy wire in the following embodiments of the present invention is sourced from Suzhou Jingjun New Material Technology Co., Ltd., and the molecular weight of the polylactic acid is 5w.

[0048] Example 1

[0049] The arrangement of the alloy wires in the polymer-based composite rod with directional arrangement of metal wires in this embodiment is equidistant and parallel arrangement;

[0050] 28.1 g of polylactic acid and 281 mL of dichloromethane were mixed to obtain a polymer solution; the bracket was punched with a laser engraving machine, the hole diameter was 0.5 mm, the hole center distance was 1 mm, and the hole center was 0.6 mm from the bottom surface of the bracket to obtain a pre-designed bracket; the two ends of a magnesium alloy wire with a length of 130 mm and a diameter of 0.4 mm were fixed on two pre-designed brackets to obtain a bracket with an alloy wire fixed thereon; the bracket with the alloy wire fixed thereon was placed close to the inner wall of a polytetrafluoroethylene flat-bottom mold (the mold was 130 mm wide and 180 mm long) into a mold to obtain a mold containing an alloy wire; the polymer solution was poured into the mold containing the alloy wire, and the pouring thickness was set to 1.2 mm. After the pouring was completed, it was allowed to stand for 2 4h, and then dried at 60℃ for 6h to obtain a composite sheet; the composite sheet was cut into several thin sheets with a width of 12mm, a height of 1.2mm and a length of 120mm, and then 5 thin sheets were stacked in order, tightly wrapped with tin foil, and hot-pressed with a mold. The hot-pressing molding included the following steps: first pre-pressing at a temperature of 145℃ and a pressure of 2MPa for 5min, and then hot-pressing at a temperature of 175℃ and a pressure of 2MPa for 15min, then cooling to 145℃ under a pressure of 2MPa, and finally depressurizing at 145℃, air-cooling to room temperature, taking out, and cutting with a precision lathe to obtain a polymer-based composite rod with a diameter of 6mm and a length of 120mm with oriented metal wires.

[0051] The schematic diagram of the preparation process of the polymer-based composite rod with oriented metal wire arrangement in this embodiment is as follows: Figure 2 shown.

[0052] Example 2

[0053] The other conditions in Example 1 remain unchanged, and the diameter of the holes punched by the laser engraving machine in the bracket is modified to be 0.7 mm, and the diameter of the magnesium alloy wire is 0.6 mm, so as to obtain a polymer-based composite rod with a diameter of 6 mm and a length of 120 mm and oriented arrangement of metal wires.

[0054] Example 3

[0055] The other conditions in Example 1 remain unchanged, and the diameter of the holes punched by the laser engraving machine in the bracket is modified to be 0.9 mm, and the diameter of the magnesium alloy wire is 0.8 mm, so as to obtain a polymer-based composite rod with a diameter of 6 mm and a length of 120 mm and oriented arrangement of metal wires.

[0056] Example 4

[0057] The arrangement of the alloy wires in the polymer-based composite rod with directional arrangement of metal wires in this embodiment is parallel arrangement of concentric circles;

[0058] 28.1g of polylactic acid and 281mL of dichloromethane were mixed to obtain a polymer solution; the magnesium alloy wire was immersed in a hydrofluoric acid solution with a mass fraction of 40% for fluorination treatment, and the fluorination treatment temperature was set to 25°C and the time was 24h. After the treatment, it was washed with water and ethanol in sequence, and air-dried to obtain the treated magnesium alloy wire; the bracket was punched with a laser engraving machine, the hole diameter was 0.5mm, the hole center distance was 1mm, and the position of the hole was drawn by CAD to obtain a pre-designed bracket; the two ends of the treated magnesium alloy wire with a length of 130mm and a diameter of 0.4mm were fixed on two pre-designed brackets to obtain a bracket with alloy wire fixed; the bracket with alloy wire fixed was placed in a mold close to the inner wall of a polytetrafluoroethylene flat-bottom mold (the mold was 130mm wide and 180mm long) to obtain a mold containing alloy wire; the polymer The solution is poured into a mold containing an alloy wire, and the pouring thickness is set to 1.2 mm. After the pouring is completed, it is allowed to stand for 24 hours, and then dried at 60°C for 6 hours to obtain a composite sheet; the composite sheet is cut into several thin sheets with a width of 12 mm, a height of 1.2 mm, and a length of 120 mm, and then 5 thin sheets are stacked in order according to the specified position, tightly wrapped with tin foil, and hot-pressed using a mold. The hot-pressing molding includes the following steps: first pre-pressing at a temperature of 145°C and a pressure of 2 MPa for 5 minutes, and then hot pressing at a temperature of 175°C and a pressure of 2 MPa for 15 minutes, and then cooling to 145°C under a pressure of 2 MPa, and finally depressurizing at 145°C, air cooling to room temperature, taking out, and cutting using a precision lathe to obtain a polymer-based composite rod with a diameter of 6 mm and a length of 120 mm with directional arrangement of metal wires.

[0059] The schematic diagram of the preparation process of the polymer-based composite rod with oriented metal wire arrangement in this embodiment is as follows: Figure 3 shown.

[0060] Example 5

[0061] The other conditions in Example 2 are controlled unchanged, and the diameter of the hole punched by the laser engraving machine in the bracket is modified to be 0.7 mm. The diameter of the treated magnesium alloy wire is 0.6 mm, and a polymer-based composite rod with a diameter of 6 mm and a length of 120 mm having directional arrangement of metal wires is obtained.

[0062] Example 6

[0063] The other conditions in Example 2 are controlled unchanged, and the diameter of the hole punched by the laser engraving machine in the bracket is modified to be 0.9 mm. The diameter of the treated magnesium alloy wire is 0.8 mm, and a polymer-based composite rod with a diameter of 6 mm and a length of 120 mm having directional arrangement of metal wires is obtained.

[0064] Example 7

[0065] The arrangement of the alloy wires in the polymer-based composite rod with directional arrangement of metal wires in this embodiment is equidistant and parallel arrangement;

[0066] 27.26g of polylactic acid, 0.84g of magnesium powder and 281mL of dichloromethane were mixed to obtain a polymer solution; the bracket was punched with a laser engraving machine, the hole diameter was 0.7mm, the hole center distance was 1mm, and the hole center was 0.6mm away from the bottom surface of the bracket to obtain a pre-designed bracket; the two ends of a magnesium alloy wire with a length of 130mm and a diameter of 0.6mm were fixed on two pre-designed brackets to obtain a bracket with an alloy wire fixed thereon; the bracket with the alloy wire fixed thereon was placed into a polytetrafluoroethylene flat-bottom mold (the mold was 130mm wide and 180mm long) against the inner wall thereof to obtain a mold containing an alloy wire; the polymer solution was poured into the mold containing the alloy wire, and the pouring thickness was set to 1.2mm. After the pouring was completed, , let stand for 24 hours, and then dry at 60°C for 6 hours to obtain a composite sheet; cut the composite sheet into several thin sheets with a width of 12 mm, a height of 1.2 mm, and a length of 120 mm, and then stack 5 thin sheets in order, wrap them tightly with tin foil, and use a mold for hot pressing. The hot pressing molding includes the following steps: first pre-pressing at a temperature of 145°C and a pressure of 2MPa for 5 minutes, and then hot pressing at a temperature of 175°C and a pressure of 2MPa for 15 minutes, then cooling to 145°C under a pressure of 2MPa, and finally depressurizing at 145°C, air cooling to room temperature, taking out, and cutting with a precision lathe to obtain a polymer-based composite rod with a diameter of 6 mm and a length of 120 mm with oriented metal wire arrangements.

[0067] Example 8

[0068] The arrangement of the alloy wires in the polymer-based composite rod with directional arrangement of metal wires in this embodiment is equidistant and parallel arrangement;

[0069] 18.14 g of polylactic acid, 0.56 g of magnesium powder and 187 mL of dichloromethane were mixed to obtain a polymer solution; the bracket was punched with a laser engraving machine, the hole diameter was 0.5 mm, the hole center distance was 1 mm, and the hole center was 0.6 mm from the bottom surface of the bracket to obtain a pre-designed bracket; the two ends of a magnesium alloy wire with a length of 130 mm and a diameter of 0.4 mm were fixed on two pre-designed brackets to obtain a bracket with an alloy wire fixed thereon; the bracket with the alloy wire fixed thereon was placed close to the inner wall of a polytetrafluoroethylene flat-bottom mold (the mold was 130 mm wide and 180 mm long) into a mold to obtain a mold containing an alloy wire; the polymer solution was poured into the mold containing the alloy wire, and the pouring thickness was set to 0.8 mm. After the pouring was completed, , let stand for 24 hours, and then dry at 60°C for 6 hours to obtain a composite sheet; cut the composite sheet into several thin sheets with a width of 12 mm, a height of 0.8 mm, and a length of 120 mm, and then stack 7 thin sheets in order, wrap them tightly with tin foil, and use a mold for hot pressing. The hot pressing molding includes the following steps: first pre-pressing for 5 minutes at a temperature of 145°C and a pressure of 2MPa, and then hot pressing for 15 minutes at a temperature of 175°C and a pressure of 2MPa, then cooling to 145°C under a pressure of 2MPa, and finally depressurizing at 145°C, air cooling to room temperature, taking out, and cutting with a precision lathe to obtain a polymer-based composite rod with a diameter of 6 mm and a length of 120 mm with oriented metal wires.

[0070] Example 9

[0071] The arrangement of the alloy wires in the polymer-based composite rod with directional arrangement of metal wires in this embodiment is equidistant and parallel arrangement;

[0072] 45.4 g of polylactic acid, 1.4 g of magnesium powder and 468 mL of dichloromethane were mixed to obtain a polymer solution; the bracket was punched with a laser engraving machine, the diameter of the central hole was 1.3 mm, and the diameter of the remaining holes except the central hole was 0.9 mm, the hole center distance was 1 mm, and the hole center was 0.6 mm from the bottom surface of the bracket to obtain a pre-designed bracket; four magnesium alloy wires with a length of 130 mm and a diameter of 0.8 mm and one with a length of 130 mm and a diameter of 1.2 mm were fixed at both ends on two pre-designed brackets to obtain a bracket with alloy wires fixed thereon; the bracket with alloy wires fixed thereon was placed into a polytetrafluoroethylene flat-bottom mold (the mold was 130 mm wide and 180 mm long) close to the inner wall thereof to obtain a mold containing alloy wires; the polymer solution was poured into the mold containing the alloy wires. In the mold, the pouring thickness is set to 2mm. After the pouring is completed, it is allowed to stand for 24 hours, and then dried at 60°C for 6 hours to obtain a composite sheet; the composite sheet is cut into several thin sheets with a width of 12mm, a height of 2mm, and a length of 120mm, and then three thin sheets are stacked in order, tightly wrapped with tin foil, and hot-pressed using a mold. The hot-pressing molding includes the following steps: first pre-pressing at a temperature of 145°C and a pressure of 2MPa for 5min, and then hot-pressing at a temperature of 175°C and a pressure of 2MPa for 15min, then cooling to 145°C under a pressure of 2MPa, and finally depressurizing at 145°C, air-cooling to room temperature, taking out, and cutting using a precision lathe to obtain a polymer-based composite rod with a diameter of 6mm and a length of 120mm with oriented metal wires.

[0073] The schematic diagram of the preparation process of the polymer-based composite rod with oriented metal wire arrangement in Examples 7 to 9 is as follows: Figure 4 shown.

[0074] Comparative Example 1

[0075] The composite rod is prepared by a hot melt forming method, wherein the magnesium alloy wire is directly placed in a mold, and then molten polylactic acid is poured into the mold to obtain the composite rod.

[0076] The structural diagram of the composite rod in this comparative example is as follows: Figure 5 As shown. Figure 5 It can be seen that the metal wires in the composite rod obtained in this comparative example are not arranged in a directional manner and have poor regularity.

[0077] It can be seen from the above embodiments that the present invention provides a method for preparing a polymer-based composite rod with directional arrangement of metal wires, comprising the following steps: mixing a polymer material and an organic solvent to obtain a polymer solution; placing a bracket fixed with an alloy wire into a mold to obtain a mold containing the alloy wire; pouring the polymer solution into the mold containing the alloy wire, and sequentially standing and drying to obtain a composite sheet; sequentially cutting, laminating and hot-pressing the composite sheet to obtain a polymer-based composite rod with directional arrangement of metal wires. The present invention has a simple process and strong practicality. According to the preparation method provided by the present invention, a polymer-based composite rod with directional arrangement of metal wires can be prepared, maintaining the uniformity and performance consistency of the composite material, and the size and position of the metal wire and the proportion of the composite material are easy to control, thereby making it easy to control the performance of the composite material, so that it can better adapt to various application requirements.

[0078] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A method for preparing a polymer-based composite rod with oriented metal wires, characterized in that: It includes the following steps: (1) mixing a polymer material and an organic solvent to obtain a polymer solution; placing a stent with an alloy wire fixed thereon into a mold to obtain a mold containing the alloy wire; pouring the polymer solution into the mold containing the alloy wire, and sequentially allowing the mixture to stand and dry to obtain a composite sheet; (2) The composite sheets are cut, laminated and hot-pressed in sequence to obtain the polymer-based composite rod with directional arrangement of metal wires.

2. The method for preparing a polymer-based composite rod with oriented metal wires according to claim 1, characterized in that: In step (1), the polymer material includes polylactic acid or polycaprolactone; and the organic solvent includes dichloromethane or chloroform.

3. The method for preparing a polymer-based composite rod with oriented metal wires according to claim 1 or 2, characterized in that: The mass volume ratio of the polymer material and the organic solvent in step (1) is 0.08-0.125 g:1 mL.

4. The method for preparing a polymer-based composite rod with oriented metal wires according to claim 3, characterized in that: The polymer solution in step (1) also includes functional additives; the functional additives include magnesium powder.

5. The method for preparing a polymer-based composite rod with oriented metal wires according to claim 4, characterized in that: The standing time in step (1) is 10 to 36 hours, the drying temperature is 55 to 65° C., and the drying time is 5 to 7 hours.

6. The method for preparing a polymer-based composite rod with oriented metal wires according to claim 1 or 5, characterized in that: The pouring thickness in step (1) is 0.2 to 2.5 mm.

7. The method for preparing a polymer-based composite rod with oriented metal wires according to claim 6, characterized in that: The hot pressing molding in step (2) comprises the following steps: (a) pre-pressing for 3 to 7 minutes at a temperature below the melting temperature of the polymer material and above the glass transition temperature; (b) hot pressing for 13 to 17 minutes at a temperature 5 to 15°C above the melting temperature of the polymer material; and (c) releasing the pressure at a temperature below the melting temperature of the polymer material and above the glass transition temperature.

8. The method for preparing a polymer-based composite rod with oriented metal wires according to claim 7, characterized in that: The pressure of the hot pressing molding in step (2) is 2 to 5 MPa; The arrangement of the alloy wires in the polymer-based composite rod with directional arrangement of the metal wires in step (2) is equidistant parallel arrangement or concentric parallel arrangement.

9. The polymer-based composite rod with oriented metal wires prepared by the method for preparing the polymer-based composite rod with oriented metal wires according to any one of claims 1 to 8.

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