CN110698855A

CN110698855A - 3D printing material and preparation method thereof

Info

Publication number: CN110698855A
Application number: CN201910949313.4A
Authority: CN
Inventors: 胡剑辉; 胡丕桥; 张晓军
Original assignee: Zhejiang Qianxin Technology Co Ltd
Current assignee: Zhejiang Qianxin Technology Co Ltd
Priority date: 2019-10-08
Filing date: 2019-10-08
Publication date: 2020-01-17

Abstract

The invention discloses a 3D printing material, which relates to the technical field of 3D printing and comprises the following components in percentage by mass: 15-28% of 1-adamantane formaldehyde modified polylactic acid, 10-20% of toluene, 16-25% of modified aramid pulp, 10-20% of graphene oxide, 2-6% of carbon fiber, 1-6% of nano titanium dioxide, 2-4% of toughening agent, 1-3% of adhesion promoter, 3-9% of brightener, 1-2% of fluidity regulator, 2-3% of antioxidant and 2-9% of aluminum powder. The invention also discloses a preparation method of the 3D printing material, which comprises four steps. According to the invention, through reasonable matching of various components, a molded product made of the 3D printing material has no influence on human health in the later use process, the strength, toughness, electric conductivity, heat conductivity and the like of the material can achieve the best use effect, the requirements of various special occasions can be met, the structure of the material is more compact, and the mechanical property is fully improved.

Description

3D printing material and preparation method thereof

Technical Field

The invention relates to the technical field of printing materials, in particular to a 3D printing material and a preparation method thereof.

Background

3D prints and is a rapid prototyping technique, be known as the core technology of "third time industrial revolution", compare with traditional manufacturing technology, 3D prints and need not make the mould in advance, needn't get rid of a large amount of materials in manufacturing process, also needn't just can obtain final product through complicated forging technology, can realize configuration optimization in production, material saving and energy saving, the material is the material basis that 3D printed, also be the bottleneck that restricts 3D at present and print the development, but current 3D prints material mechanical properties and tinctorial strength poor, and the entity finished product of printing is more fragile, heat resistance is not good.

Therefore, it is necessary to provide a 3D printing material and a method for preparing the same to solve the above problems.

Disclosure of Invention

Technical problem to be solved

Aiming at the defects of the prior art, the invention provides a 3D printing material and a preparation method thereof, and solves the problems in the background art.

(II) technical scheme

In order to achieve the purpose, the invention is realized by the following technical scheme:

A3D printing material comprises the following components (in percentage by mass): 15-28% of 1-adamantane formaldehyde modified polylactic acid, 10-20% of toluene, 16-25% of modified aramid pulp, 10-20% of graphene oxide, 2-6% of carbon fiber, 1-6% of nano titanium dioxide, 2-4% of toughening agent, 1-3% of adhesion promoter, 3-9% of brightener, 1-2% of fluidity regulator, 2-3% of antioxidant and 2-9% of aluminum powder.

Optionally, the average particle size of the nano titanium dioxide is 30-70 nm;

the average diameter of the carbon fiber is 30-200 μm.

Optionally, the toughening agent is liquid polybutadiene rubber;

the fluidity regulator is butyl stearate.

Optionally, 15% of 1-adamantane formaldehyde modified polylactic acid, 20% of toluene, 16% of modified aramid pulp, 20% of graphene oxide, 2% of carbon fiber, 6% of nano titanium dioxide, 2% of toughening agent, 3% of adhesion promoter, 3% of brightener, 2% of fluidity regulator, 2% of antioxidant and 9% of aluminum powder.

Optionally, 21.5% of 1-adamantane formaldehyde modified polylactic acid, 15% of toluene, 20.5% of modified aramid pulp, 15% of graphene oxide, 4% of carbon fiber, 3.5% of nano titanium dioxide, 3% of toughening agent, 2% of adhesion promoter, 6% of brightener, 1.5% of fluidity regulator, 2.5% of antioxidant and 5.5% of aluminum powder.

Optionally, 28% of 1-adamantane formaldehyde modified polylactic acid, 10% of toluene, 25% of modified aramid pulp, 10% of graphene oxide, 6% of carbon fiber, 1% of nano titanium dioxide, 4% of toughening agent, 1% of adhesion promoter, 9% of brightener, 1% of fluidity regulator, 3% of antioxidant and 2% of aluminum powder.

A preparation method of a 3D printing material comprises the following steps:

a: preparing 1-adamantane formaldehyde modified polylactic acid, toluene, modified aramid pulp, graphene oxide, carbon fiber, nano titanium dioxide, a toughening agent, an adhesion promoter, a brightening agent, a fluidity regulator, an antioxidant and aluminum powder according to mass percentage;

b: adding 1-adamantane formaldehyde modified polylactic acid, toluene, an adhesion promoter, modified aramid pulp and graphene oxide into a homogenizer, heating, stirring and mixing to obtain a primary mixture;

c: then adding carbon fiber, nano titanium dioxide, a toughening agent, a brightening agent, a fluidity regulator, an antioxidant and aluminum powder into the primary mixture in sequence, continuously heating, mixing and stirring, and uniformly mixing to obtain a final mixture;

d: irradiating the final mixture by an ultraviolet lamp, transferring the final mixture into a double-screw extruder, heating and extruding, drawing strips to obtain an extruded wire, cooling the extruded wire, taking up the wire, and drying the wire in a vacuum drying oven to obtain the 3D printing material.

Optionally, the rotating speed of the refiner in the step B is 500-700 r/min, the mixing temperature is 71-79 ℃, and the mixing time is 60-80 min.

Optionally, the temperature in the step C is 89-93 ℃, and the stirring time is 47-55 min.

Optionally, the irradiation time in the step D is 70-78 min, and the extrusion heating temperature is 170-178 ℃.

(III) advantageous effects

The invention provides a 3D printing material and a preparation method thereof, and the material has the following beneficial effects:

(1) according to the invention, through reasonable matching of various components, a molded product made of the 3D printing material has no influence on human health in the later use process, the strength, toughness, electric conduction performance, heat conduction performance and the like of the material can achieve the best use effect, and the requirements of various special occasions can be met.

(2) According to the invention, the carbon fiber is used for better exerting the function of the material, the electrical conductivity and the thermal conductivity of the material are increased, the tensile strength and the bending resistance of the material are enhanced by modifying the aramid pulp, the structure of the material is more compact, the mechanical property is fully improved, the polylactic acid is modified by 1-adamantane formaldehyde, the 3D printing material not only keeps the advantages of small cooling shrinkage rate, easiness in dyeing and the like of the polylactic acid, but also has better comprehensive performance, better toughness and impact strength and higher thermal deformation temperature, and the improvement effects of the strength, the electrical conductivity and the thermal conductivity of the material are most obvious by adding the metal powder.

(3) According to the refiner for processing the 3D printing material, the stirring shaft and the spiral guide shaft can be driven to rotate simultaneously by adopting the motor, so that the processing cost is more economic, slurry at the bottom end in the cavity enters the guide cylinder through the feeding hole in the guide cylinder, the slurry is transmitted to the top end of the guide cylinder through the rotation of the spiral guide shaft and is discharged through the discharge hole to enter the stirring cavity again for stirring treatment, the slurry is mixed more uniformly in this way, the stirring is more sufficient, the feed inlet is convenient to open or close through the matching use of the plug cap and the air cylinder, and the plug cap blocks the feed inlet in the stirring process of the slurry, so that the waste caused by the loss of heat in the cavity from the feed inlet is reduced.

Drawings

FIG. 1 is a schematic structural view of a homogenizer of the present invention;

FIG. 2 is a schematic perspective view of a material guiding cylinder according to the present invention;

FIG. 3 is a schematic cross-sectional view of a material guiding cylinder according to the present invention;

fig. 4 is a schematic view of an appearance structure of the housing of the present invention.

In the figure: the device comprises a machine shell 1, a heating rod 2, a material guide cylinder 3, a plug cap 4, a cylinder 5, a feeding hole 6, a stirring shaft 7, a spiral material guide shaft 8, a material hole 9, a motor 10, a belt wheel 11, a support 12, a connecting plate 13, a traveling wheel 14 and a discharging pipe 15.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention.

In the present invention, unless otherwise expressly specified or limited, the terms "disposed," "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected or detachably connected; may be a mechanical connection; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.

Example 1:

A3D printing material comprises the following components (in percentage by mass): 15% of 1-adamantane formaldehyde modified polylactic acid, 20% of toluene, 16% of modified aramid pulp, 20% of graphene oxide, 2% of carbon fiber, 6% of nano titanium dioxide, 2% of toughening agent, 3% of adhesion promoter, 3% of brightening agent, 2% of fluidity regulator, 2% of antioxidant and 9% of aluminum powder, wherein the average particle size of the nano titanium dioxide is 30nm, the average diameter of the carbon fiber is 30 microns, the toughening agent is liquid polybutadiene rubber, and the fluidity regulator is butyl stearate.

A preparation method of a 3D printing material comprises the following steps:

b: adding 1-adamantane formaldehyde modified polylactic acid, toluene, an adhesion promoter, modified aramid pulp and graphene oxide into a homogenizer, heating, stirring and mixing, wherein the rotating speed of the homogenizer is 500r/min, the mixing temperature is 71 ℃, and the mixing time is 60min to obtain a primary mixture;

c: then sequentially adding carbon fiber, nano titanium dioxide, a toughening agent, a brightening agent, a fluidity regulator, an antioxidant and aluminum powder into the primary mixture, continuously heating, mixing and stirring at 89 ℃ for 47min, and uniformly mixing to obtain a final mixture;

d: irradiating the final mixture by an ultraviolet lamp for 70min, transferring the final mixture into a double-screw extruder, heating and extruding the mixture at the extrusion heating temperature of 170 ℃, drawing strips to obtain an extruded wire, cooling the extruded wire, and taking up and drying the extruded wire in a vacuum drying oven to obtain the 3D printing material.

Example 2:

A3D printing material comprises the following components (in percentage by mass): 21.5% of 1-adamantane formaldehyde modified polylactic acid, 15% of toluene, 20.5% of modified aramid pulp, 15% of graphene oxide, 4% of carbon fiber, 3.5% of nano titanium dioxide, 3% of toughening agent, 2% of adhesion promoter, 6% of brightening agent, 1.5% of fluidity regulator, 2.5% of antioxidant and 5.5% of aluminum powder, wherein the average particle size of the nano titanium dioxide is 50nm, the average diameter of the carbon fiber is 100 microns, the toughening agent is liquid polybutadiene rubber, and the fluidity regulator is butyl stearate.

A preparation method of a 3D printing material comprises the following steps:

b: adding 1-adamantane formaldehyde modified polylactic acid, toluene, an adhesion promoter, modified aramid pulp and graphene oxide into a homogenizer, heating, stirring and mixing, wherein the rotating speed of the homogenizer is 600r/min, the mixing temperature is 75 ℃, and the mixing time is 70min to obtain a primary mixture;

c: then sequentially adding carbon fiber, nano titanium dioxide, a toughening agent, a brightening agent, a fluidity regulator, an antioxidant and aluminum powder into the primary mixture, continuously heating, mixing and stirring at the temperature of 91 ℃ for 50min, and uniformly mixing to obtain a final mixture;

d: irradiating the final mixture by an ultraviolet lamp for 74min, transferring the final mixture into a double-screw extruder, heating and extruding the mixture at the extrusion heating temperature of 174 ℃, drawing strips to obtain an extruded wire, cooling the extruded wire, taking up the wire, and drying the wire in a vacuum drying oven to obtain the 3D printing material.

Example 3:

A3D printing material comprises the following components (in percentage by mass): 28% of 1-adamantane formaldehyde modified polylactic acid, 10% of toluene, 25% of modified aramid pulp, 10% of graphene oxide, 6% of carbon fiber, 1% of nano titanium dioxide, 4% of toughening agent, 1% of adhesion promoter, 9% of brightener, 1% of fluidity regulator, 3% of antioxidant and 2% of aluminum powder, wherein the average particle size of the nano titanium dioxide is 70nm, the average diameter of the carbon fiber is 200 microns, the toughening agent is liquid polybutadiene rubber, and the fluidity regulator is butyl stearate.

A preparation method of a 3D printing material comprises the following steps:

b: adding 1-adamantane formaldehyde modified polylactic acid, toluene, an adhesion promoter, modified aramid pulp and graphene oxide into a homogenizer, heating, stirring and mixing, wherein the rotating speed of the homogenizer is 700r/min, the mixing temperature is 79 ℃, and the mixing time is 80min to obtain a primary mixture;

c: then sequentially adding carbon fiber, nano titanium dioxide, a toughening agent, a brightening agent, a fluidity regulator, an antioxidant and aluminum powder into the primary mixture, continuously heating, mixing and stirring at the temperature of 93 ℃ for 55min, and uniformly mixing to obtain a final mixture;

d: irradiating the final mixture by an ultraviolet lamp for 78min, transferring the final mixture into a double-screw extruder, heating and extruding the final mixture at 178 ℃, drawing strips to obtain an extruded wire, cooling the extruded wire, taking up the wire, and drying the wire in a vacuum drying oven to obtain the 3D printing material.

Watch 1

The 3D printing material can be prepared by the three groups of embodiments, and the first table shows that the 3D printing material prepared by the second group of embodiments has the best effect, various components are reasonably matched, a molded product prepared by the 3D printing material cannot influence the health of people in the later use process, the strength, the toughness, the electric conduction performance, the heat conduction performance and the like of the material can achieve the best use effect, the requirements of various special occasions can be met, polylactic acid is modified by 1-adamantane formaldehyde, so that the 3D printing material not only keeps the advantages of small cooling shrinkage rate of the polylactic acid, easiness in dyeing and the like, but also has the better comprehensive performance, the better toughness and impact strength and the higher thermal deformation temperature, and the improvement effects of the strength, the electric conduction performance and the heat conduction performance of the material are most obvious by adding metal powder, through the carbon fiber, the material can better play the role, the electrical conductivity and the thermal conductivity of the material are increased, and the tensile strength and the bending resistance of the material are enhanced through the modified aramid pulp, so that the structure of the material is more compact, and the mechanical property is fully improved.

As shown in fig. 1-4, the present invention provides a technical solution:

a homogenizer for 3D printing material processing comprises a casing 1, wherein heating rods 2 are fixedly mounted on two sides of an inner top wall of the casing 1, a guide cylinder 3 is fixedly mounted in the middle of the inner bottom wall of the casing 1, a plug cap 4 is inserted into the top end of the guide cylinder 3 in a sliding manner, an air cylinder 5 is fixedly mounted between the inner top wall of the plug cap 4 and the top end of the guide cylinder 3, a feed inlet 6 is arranged in the middle of the top of the casing 1, the plug cap 4 is positioned under the feed inlet 6 and is matched with the feed inlet 6, the feed inlet 6 is convenient to open or close by matching the plug cap 4 with the air cylinder 5, the plug cap 4 blocks the feed inlet 6 in the stirring process of slurry, so that heat in a cavity is reduced from being dissipated from the feed inlet 6, a stirring shaft 7 is mounted on two sides of the guide cylinder 3, the stirring shaft 7 is rotatably mounted in a stirring cavity of the casing 1, a spiral guide shaft 8 is, the upper end and the lower end of the wall of the guide cylinder 3 are both provided with material holes 9, the two material holes 9 are respectively a feed hole and a discharge hole, the feed hole is positioned below the discharge hole, the bottom end of the spiral guide shaft 8 sequentially penetrates through the bottom wall of the guide cylinder 3 and the bottom wall of the shell 1 and is fixedly connected with a motor 10, the output end of the motor 10 and the bottom end of the stirring shaft 7 are both fixedly provided with belt wheels 11, and the belt wheel 11 on the output end of the motor 10 and the belt wheel 11 on the bottom end of the stirring shaft 7 are connected through a belt, so that the motor 10 can simultaneously drive the stirring shaft 7 and the spiral guide shaft 8 to rotate, and carry out mixing treatment on raw materials in the cavity through the stirring shaft 7, slurry at the bottom end in the cavity enters the cylinder through the feed hole on the guide cylinder 3, is transmitted to the top end of the guide cylinder 3 through the rotation of the spiral guide, thereby make the ground paste mix more evenly with this kind of mode, the stirring is more abundant, and the row of outer surface bottom middle part fixedly connected with material pipe 15 of casing 1 arranges material pipe 15 and goes up fixed mounting and have the valve, and the bottom fixed mounting of casing 1 has symmetrical arrangement's support 12, and fixed mounting has even board 13 between two supports 12, and motor 10 fixed mounting is in the top side of even board 13, and the bottom fixed mounting of support 12 has walking wheel 14.

The working principle is as follows: when in work, the cylinder 5 stretches and retracts to drive the plug cap 4 to be drawn out from the feed inlet 6, so that the feed inlet 6 is opened, the raw materials are added into the stirring cavity of the machine shell 1 through the feed inlet 6, then the cylinder 5 extends to drive the plug cap 4 to move upwards and block the feed port 6, thereby closing the feed port 6, through belt wheel transmission, the motor 10 drives the stirring shaft 7 and the spiral guide shaft 8 to rotate simultaneously, the raw materials in the cavity are mixed through the stirring shaft 7, the slurry at the bottom end in the cavity enters the guide cylinder 3 through the feeding hole in the guide cylinder, the slurry is transmitted to the top end of the guide cylinder 3 through the rotation of the spiral guide shaft 8 and is discharged through the discharging hole to enter the stirring cavity again for stirring treatment, and in this way, the slurry is mixed more uniformly and stirred more fully, the heating rod 2 is used for heating the slurry in the stirring process, so that the mixing effect of the slurry is better.

It is noted that in the present disclosure, unless otherwise explicitly specified or limited, a first feature "on" or "under" a second feature may be directly contacted with the first and second features, or indirectly contacted with the first and second features through intervening media. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.

Claims

1. A3D printing material is characterized by comprising the following components (in percentage by mass): 15-28% of 1-adamantane formaldehyde modified polylactic acid, 10-20% of toluene, 16-25% of modified aramid pulp, 10-20% of graphene oxide, 2-6% of carbon fiber, 1-6% of nano titanium dioxide, 2-4% of toughening agent, 1-3% of adhesion promoter, 3-9% of brightener, 1-2% of fluidity regulator, 2-3% of antioxidant and 2-9% of aluminum powder.

2. 3D printed material according to claim 1, characterized in that:

the average particle size of the nano titanium dioxide is 30-70 nm;

the average diameter of the carbon fiber is 30-200 μm.

3. 3D printed material according to claim 1, characterized in that:

the toughening agent is liquid polybutadiene rubber;

the fluidity regulator is butyl stearate.

4. 3D printed material according to claim 1, characterized by comprising the following composition (in mass percent): 15% of 1-adamantane formaldehyde modified polylactic acid, 20% of toluene, 16% of modified aramid pulp, 20% of graphene oxide, 2% of carbon fiber, 6% of nano titanium dioxide, 2% of toughening agent, 3% of adhesion promoter, 3% of brightening agent, 2% of fluidity regulator, 2% of antioxidant and 9% of aluminum powder.

5. 3D printed material according to claim 1, characterized by comprising the following composition (in mass percent): 21.5% of 1-adamantane formaldehyde modified polylactic acid, 15% of toluene, 20.5% of modified aramid pulp, 15% of graphene oxide, 4% of carbon fiber, 3.5% of nano titanium dioxide, 3% of toughening agent, 2% of adhesion promoter, 6% of brightener, 1.5% of fluidity regulator, 2.5% of antioxidant and 5.5% of aluminum powder.

6. 3D printed material according to claim 1, characterized by comprising the following composition (in mass percent): 28% of 1-adamantane formaldehyde modified polylactic acid, 10% of toluene, 25% of modified aramid pulp, 10% of graphene oxide, 6% of carbon fiber, 1% of nano titanium dioxide, 4% of toughening agent, 1% of adhesion promoter, 9% of brightener, 1% of fluidity regulator, 3% of antioxidant and 2% of aluminum powder.

7. A preparation method of a 3D printing material is characterized by comprising the following steps:

8. The method for preparing a 3D printed material according to claim 7, wherein:

and in the step B, the rotating speed of the refiner is 500-700 r/min, the mixing temperature is 71-79 ℃, and the mixing time is 60-80 min.

9. The method for preparing a 3D printed material according to claim 7, wherein:

and C, in the step C, the temperature is 89-93 ℃, and the stirring time is 47-55 min.

10. The method for preparing a 3D printed material according to claim 7, wherein:

in the step D, the irradiation time is 70-78 min, and the extrusion heating temperature is 170-178 ℃.