Preparation method of triboelectric function full-degradable 3D printing wire

Abstract

The invention discloses a preparation method of a fully-degradable 3D printing wire with a triboelectric function. The method comprises the following operation steps: (1) mixing and stirring coffee residue powder, polycaprolactone powder and tea polyphenol powder according to a certain proportion to obtain a blended raw material; the particle size range of the coffee residue powder is 100-300 [mu] m, and the water content is 0.1-1%; the particle size range of the polycaprolactone powder is 50-150 [mu] m, and the molecular weight of the polycaprolactone powder is 30000-80000 Da; the purity of the tea polyphenol powder is 98%; (2) putting the blended raw materials into a twin-screw extruder for extrusion and granulation to obtain a wire master batch; and (3) putting the wire master batch into a single-screw extruder for extrusion and shaping to obtain the 3D printing wire. The raw materials adopted by the invention are green and environment-friendly, the production process is simple, the production cost is low, the triboelectric property and the mechanical strength of the 3D printing wire are greatly improved by adding the coffee grounds and the tea polyphenols, and the application range of the polycaprolactone material in the field of 3D printing is effectively expanded.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of preparing friction nanogenerator materials, and particularly relates to a preparation method of a frictional electricity functional full-degradable 3D printing wire. BACKGROUND

[0002] A triboelectric nanogenerator (TENG) is a high-efficiency energy harvesting technology based on the coupling effect of triboelectricity and electrostatic induction, and has the characteristics of high instantaneous power density, lightweight structure, wide material selection range and strong environmental adaptability, and has attracted widespread attention in recent years. The fused deposition modeling (FDM) type 3D printing technology has the advantages of simple operation, low equipment cost, and easy replacement of consumables, and has unique advantages in the manufacturing of TENG devices, and has been focused in the field of triboelectricity, and has important value for promoting the rapid development of a new generation of portable electronic products, IoT and artificial intelligence.

[0003] Among the existing FDM type 3D printing materials, the materials with excellent triboelectric function and environmental friendly characteristics are very limited. Polycaprolactone (PCL) is a biodegradable plastic, and as a 3D printing wire has the advantages of environmental friendliness and easy processing, but has the disadvantages of low triboelectric performance and insufficient mechanical strength, which greatly restricts its application range. The research on the modification of PCL-based 3D printing materials at home and abroad mainly focuses on the single aspect of the mechanical properties of the materials, and the current research mainly concentrates on introducing chain extenders, inorganic fillers, organic solvents and the like. However, the increase of the mechanical strength of the material is limited, the triboelectric performance is not well improved, and there are problems such as poor environmental friendliness of the additives. Although some documents report that the addition of coffee grounds in PCL can improve the triboelectric performance, the introduction of coffee grounds will significantly reduce the mechanical strength of the material, which seriously limits its application in 3D printing wires.

[0004] Therefore, it is urgent to develop a preparation method of a triboelectric functional full-degradable 3D printing wire, so as to simultaneously improve the triboelectric performance and mechanical strength of the material, so as to expand the application range of polycaprolactone material in the field of 3D printing. SUMMARY

[0005] The technical problem to be solved by the present application is to provide a preparation method of a triboelectric functional full-degradable 3D printing wire, which uses environmentally friendly materials as raw materials, has a simple production process and low production cost, and uses coffee grounds and tea polyphenols to greatly improve the triboelectric performance and mechanical strength of the 3D printing wire, so as to effectively expand the application range of polycaprolactone material in the field of 3D printing.

[0006] The technical problem is solved by the following technical scheme:

[0007] The application discloses a preparation method of a full-degradable 3D printing wire material with a triboelectric function.

[0008] (1) coffee residue powder, polycaprolactone powder and tea polyphenol powder are mixed and stirred to obtain mixed raw materials; wherein the coffee residue powder, polycaprolactone powder and tea polyphenol powder are in a ratio of 3:1:0.4-1 by weight; the coffee residue powder has a particle size range of 100-300 μm and a moisture content of 0.1-1%; the polycaprolactone powder has a particle size range of 50-150 μm and a molecular weight of 30000-80000 Da; and the tea polyphenol powder has a purity of 98%;

[0009] (2) the mixed raw materials are put into a double-screw extruder for extrusion and granulation to obtain a wire material masterbatch;

[0010] (3) the wire material masterbatch is put into a single-screw extruder for extrusion and shaping to obtain a 3D printing wire material.

[0011] In step (1), the coffee residue powder, polycaprolactone powder and tea polyphenol powder are mixed and stirred at 200 rpm for 10 min to obtain the mixed raw materials.

[0012] The processing temperature of the double-screw extruder in step (2) and the single-screw extruder in step (3) is 80-100 ℃.

[0013] Compared with the prior art, the application has the following beneficial effects:

[0014] (1) The raw materials used in the application, coffee residue, polycaprolactone and tea polyphenol, are green and environmentally friendly, have a wide source and excellent biodegradability, and can effectively reduce the generation of non-degradable waste.

[0015] (2) The application adds coffee residue and tea polyphenol to polycaprolactone, so that the obtained material has excellent triboelectric performance and mechanical strength. The coffee residue as a filler can reduce the material cost and enhance the triboelectric output, and the tea polyphenol can significantly enhance the triboelectric output and improve the mechanical strength of the material. The application can greatly improve the performance of the product through specific formulations and process parameters, and has the unique advantage of biodegradability.

[0016] (3) The preparation process of the application is simple, no harmful substances such as organic solvents are introduced in the processing process, there is no complex requirement for equipment and process, the compatibility with traditional plastic processing equipment is good, the production cost is low, and the large-scale industrial production is easy. DETAILED DESCRIPTION

[0017] The technical solutions of the application will be further described below in combination with specific embodiments, but the application is not limited to the following embodiments, and any improvement and change made on the basis of the application is within the protection scope of the application.

[0018] Example 1

[0019] A preparation method of a triboelectric functional fully degradable 3D printing wire includes the following operation steps:

[0020] (1) The coffee grounds powder, polycaprolactone powder and tea polyphenol powder are mixed and stirred at 200 rpm for 10 min to obtain a mixed raw material; wherein the amount of coffee grounds powder, polycaprolactone powder and tea polyphenol powder is 3 parts: 1 part: 0.8 part by weight ratio; the particle size of coffee grounds powder is 100 μm, and the moisture content is 0.1%; the particle size of polycaprolactone powder is 100 μm, and the molecular weight is 80000 Da; the purity of tea polyphenol powder is 98%;

[0021] (2) The mixed raw material of step (1) is put into a double screw extruder for extrusion and granulation to obtain a wire masterbatch; wherein the processing temperature of the double screw extruder is 90℃;

[0022] (3) The wire masterbatch of step (2) is put into a single screw extruder for extrusion and shaping to obtain a 3D printing wire; wherein the processing temperature of the single screw extruder is 80℃.

[0023] The 3D printing wire prepared in this example is smooth, with a diameter of 1.75±0.05 mm, and has good printing effect. The obtained material is 3D printed into a columnar sample, and compression performance test and triboelectric performance test are carried out respectively, and the test results are shown in Table 1.

[0024] Example 2

[0025] A preparation method of a triboelectric functional fully degradable 3D printing wire includes the following operation steps:

[0026] (1) The coffee grounds powder, polycaprolactone powder and tea polyphenol powder are mixed and stirred at 200 rpm for 10 min to obtain a mixed raw material; wherein the amount of coffee grounds powder, polycaprolactone powder and tea polyphenol powder is 3 parts: 1 part: 0.4 part by weight ratio; the particle size of coffee grounds powder is 200 μm, and the moisture content is 0.5%; the particle size of polycaprolactone powder is 50 μm, and the molecular weight is 30000 Da; the purity of tea polyphenol powder is 98%;

[0027] (2) The mixed raw material of step (1) is put into a double screw extruder for extrusion and granulation to obtain a wire masterbatch; wherein the processing temperature of the double screw extruder is 80℃;

[0028] (3) The wire masterbatch of step (2) is put into a single screw extruder for extrusion and shaping to obtain a 3D printing wire; wherein the processing temperature of the single screw extruder is 90℃.

[0029] The 3D printing wire prepared in the example is smooth, has a diameter of 1.75±0.05 mm, and has good printing effect. The obtained material is 3D printed into a columnar sample, and compression performance test and triboelectric performance test are respectively performed, and the test results are shown in Table 1.

[0030] Example 3

[0031] A preparation method of a triboelectric functional fully degradable 3D printing wire comprises the following operation steps:

[0032] (1) coffee grounds powder, polycaprolactone powder and tea polyphenol powder are mixed and stirred at 200 rpm for 10 min to obtain a mixed raw material; wherein the dry coffee grounds powder, polycaprolactone powder and tea polyphenol powder are mixed in a ratio of 3 parts: 1 part: 1 part by weight; the particle size of the coffee grounds powder is 300 μm, and the moisture content is 1%; the particle size of the polycaprolactone powder is 150 μm, and the molecular weight is 50000 Da; the purity of the tea polyphenol powder is 98%;

[0033] (2) the mixed raw material of step (1) is put into a double screw extruder for extrusion and granulation to obtain a wire masterbatch; wherein the processing temperature of the double screw extruder is 100℃;

[0034] (3) the wire masterbatch of step (2) is put into a single screw extruder for extrusion and sizing to obtain a 3D printing wire; wherein the processing temperature of the single screw extruder is 100℃.

[0035] The 3D printing wire prepared in the example is smooth, has a diameter of 1.75±0.05 mm, and has good printing effect. The obtained material is 3D printed into a columnar sample, and compression performance test and triboelectric performance test are respectively performed, and the test results are shown in Table 1.

[0036] Table 1 Comparison of performance test results of materials obtained by the examples and the comparative examples of the present application

[0037]

[0038] As shown in Table 1, the material obtained by the method of the present application has excellent triboelectric performance and mechanical strength.

Claims

1. A method for preparing a triboelectrically functional fully degradable 3D printing filament, characterized in that, The following steps are included: (1) Coffee grounds powder, polycaprolactone powder, and tea polyphenol powder are mixed and stirred to obtain a blended raw material; wherein, the amount of coffee grounds powder, polycaprolactone powder, and tea polyphenol powder is in the weight ratio of 3 parts: 1 part: 0.4 to 1 part; the particle size range of coffee grounds powder is 100 to 300 μm, and the moisture content is 0.1 to 1%; the particle size range of polycaprolactone powder is 50 to 150 μm, and the molecular weight is 30,000 to 80,000 Da; the purity of tea polyphenol powder is 98%; (2) The blended raw materials are fed into a twin-screw extruder for extrusion and granulation to obtain wire rod masterbatch; (3) The filament masterbatch is put into a single screw extruder for extrusion and shaping to obtain 3D printed filament.

2. The method for preparing the triboelectric functional fully degradable 3D printing filament according to claim 1, characterized in that, In step (1), coffee grounds powder, polycaprolactone powder, and tea polyphenol powder are mixed and stirred at 200 rpm for 10 min to obtain the blended raw materials.

3. The method for preparing the triboelectric functional fully degradable 3D printing filament according to claim 1 or 2, characterized in that, The processing temperature of the twin-screw extruder in step (2) and the single-screw extruder in step (3) is 80-100℃.

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