CN114539801A - Oyster shell powder-reinforced 3D printing composite material and preparation method thereof - Google Patents
Oyster shell powder-reinforced 3D printing composite material and preparation method thereof Download PDFInfo
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- CN114539801A CN114539801A CN202111415206.7A CN202111415206A CN114539801A CN 114539801 A CN114539801 A CN 114539801A CN 202111415206 A CN202111415206 A CN 202111415206A CN 114539801 A CN114539801 A CN 114539801A
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- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 title claims abstract description 55
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- 239000002131 composite material Substances 0.000 title claims abstract description 32
- 238000002360 preparation method Methods 0.000 title claims abstract description 17
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- 238000000227 grinding Methods 0.000 claims abstract description 4
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- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 8
- 239000002245 particle Substances 0.000 claims description 6
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 claims description 3
- 239000003513 alkali Substances 0.000 claims description 3
- 238000000502 dialysis Methods 0.000 claims description 3
- 229910021642 ultra pure water Inorganic materials 0.000 claims description 3
- 239000012498 ultrapure water Substances 0.000 claims description 3
- 239000000463 material Substances 0.000 abstract description 25
- 238000005299 abrasion Methods 0.000 abstract description 5
- 239000002994 raw material Substances 0.000 abstract description 2
- 238000012360 testing method Methods 0.000 description 17
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- 238000004519 manufacturing process Methods 0.000 description 9
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- 230000007246 mechanism Effects 0.000 description 8
- 239000004696 Poly ether ether ketone Substances 0.000 description 7
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 7
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- 230000009471 action Effects 0.000 description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 4
- 238000013461 design Methods 0.000 description 4
- ZIUHHBKFKCYYJD-UHFFFAOYSA-N n,n'-methylenebisacrylamide Chemical compound C=CC(=O)NCNC(=O)C=C ZIUHHBKFKCYYJD-UHFFFAOYSA-N 0.000 description 4
- 238000003825 pressing Methods 0.000 description 4
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- 229910052799 carbon Inorganic materials 0.000 description 3
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- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 2
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- 229910052708 sodium Inorganic materials 0.000 description 2
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- 238000006467 substitution reaction Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- JUPQTSLXMOCDHR-UHFFFAOYSA-N benzene-1,4-diol;bis(4-fluorophenyl)methanone Chemical compound OC1=CC=C(O)C=C1.C1=CC(F)=CC=C1C(=O)C1=CC=C(F)C=C1 JUPQTSLXMOCDHR-UHFFFAOYSA-N 0.000 description 1
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- QAOWNCQODCNURD-UHFFFAOYSA-N sulfuric acid Substances OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/24—Acids; Salts thereof
- C08K3/26—Carbonates; Bicarbonates
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y70/00—Materials specially adapted for additive manufacturing
- B33Y70/10—Composites of different types of material, e.g. mixtures of ceramics and polymers or mixtures of metals and biomaterials
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/24—Acids; Salts thereof
- C08K3/26—Carbonates; Bicarbonates
- C08K2003/265—Calcium, strontium or barium carbonate
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Medicinal Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Ceramic Engineering (AREA)
- Civil Engineering (AREA)
- Composite Materials (AREA)
- Structural Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
Abstract
The invention introduces a preparation method of an oyster shell powder reinforced 3D printing composite material, which comprises the following steps: s1, cleaning the surfaces of oyster shells; s2, crushing and grinding; s3, screening by using a 100-mesh sieve; s4, dialyzing and removing impurities from the powder obtained in the step S3; s5, drying the powder obtained in the step S4 to obtain powdered oyster shell powder; s6, adding powdered oyster shell powder into photosensitive resin, and mixing and stirring to form a mixture; s7, stirring for a period of time, and then carrying out ultrasonic treatment to obtain a 3D printing composite material; and S8, placing the 3D printing composite material into a trough of an SLA photosensitive resin 3D printer. The method uses the oyster shell and the photosensitive resin as raw materials, the oyster shell resources are wide, the sources are rich, the ecological environment is not damaged by the obtained materials, and meanwhile, the printing cost can be reduced by using the method designed by the application, so that the printing forming model has high fineness, and the finished product after printing forming has good appearance glossiness, high abrasion resistance, strong hardness and longer service life.
Description
Technical Field
The invention belongs to the field of preparation design of 3D printing composite materials, and particularly relates to an oyster shell powder reinforced 3D printing composite material and a preparation method thereof.
Background
The 3D printing technology is characterized in that a computer three-dimensional design model is used as a blueprint, special materials such as metal powder, ceramic powder, plastics, cell tissues and the like are stacked layer by layer and bonded through a software layering dispersion and numerical control forming system in a laser beam mode, a hot melting nozzle mode and the like, and finally, an entity product is manufactured through superposition forming. The limitations and bottlenecks of 3D printing technology are mainly reflected in the material. At present, printing materials are mainly plastics, resin, plaster, ceramics, sand, metal and the like, and materials which can be used for 3D printing are very limited. Moreover, 3D printing is still a relatively expensive technique. Due to the reasons that the research and development difficulty of materials for additive manufacturing is high, the usage amount is not large and the like, the 3D printing manufacturing cost is high, and the manufacturing efficiency is not high. At present, the 3D printing technology is mainly applied to research and development of new products in our country, and has high manufacturing cost, low manufacturing efficiency, and unsatisfactory manufacturing accuracy.
SLA technology is the mainstream technology for photocuring. The SLA forming technology is not only a rapid forming technology which is the earliest and realized commercialization in the world, but also one of the most deeply researched and widely applied rapid forming technologies. The main material used in the SLA technique is a photosensitive resin. The photosensitive resin is a stereolithography resin having precise and durable characteristics. It is used for the photocuring molding method of solid-state laser. The method can be applied to the manufacture of female molds, conceptual models, general parts and functional parts in the industrial fields of automobiles, medical treatment, consumer electronics and the like.
Chinese patent CN112390969A discloses a carbon fiber reinforced 3D printing material and a preparation process thereof, the process comprising the following steps: s1; the smearing mechanism is used for smearing pretreatment on the carbon fibers, and the extrusion support is used for pushing the carbon fibers into the blowing mechanism; s2; the blowing mechanism cuts the extending carbon fibers and pushes the carbon fibers into the wire feeding mechanism, and the ventilation mechanism pushes the carbon fibers in the wire feeding mechanism into the extrusion support through wind power; s3; the extruding mechanism extrudes and forms the printing material and the cut carbon fiber in the extruding bracket out of the extruding bracket; a carbon fiber reinforced 3D printing material is composed of a 3D printing wire and a plurality of sections of carbon fibers, wherein the plurality of sections of carbon fibers are sequentially and respectively inserted into the 3D printing wire; on the basis of increasing the 3D printing wire strength, the printing machine can also be used for printing in a pause and replacement position in the printing process. However, carbon fiber is expensive and has a dark color, which is not suitable for popularization.
Chinese patent CN108424605A discloses a polyetheretherketone 3D printing material, which comprises the following raw materials in parts by weight: 100 parts of polyether-ether-ketone, 10-100 parts of methylene bisacrylamide and 2-10 parts of polyetherimide; the method for preparing the polyether-ether-ketone 3D printing material comprises the following steps:
step I, dissolving the polyether-ether-ketone in parts by weight in concentrated sulfuric acid to obtain sulfonated polyether-ether-ketone;
step II, dissolving the methylene bisacrylamide in parts by weight in water to obtain a methylene bisacrylamide solution;
step III, mixing the sulfonated polyether ether ketone obtained in the step I with the methylene bisacrylamide solution obtained in the step II to obtain PEEK-MBA;
step IV, drying the PEEK-MBA obtained in the step III, mixing the dried PEEK-MBA with the polyetherimide in parts by weight, and blending and extruding the mixture by using a double-screw extruder to obtain a PEEK-MBA-PEI blend;
and V, adding the PEEK-MBA-PEI blend obtained in the step IV into a conical counter-rotating twin-screw extruder for extrusion molding to obtain a PEEK-MBA-PEI wire material, namely the PEEK 3D printing material. There are many technical solutions for designing a printing material, but the design solution for solving the technical problems caused by the photosensitive resin is still insufficient.
Because the photosensitive resin has the advantages of smooth surface, high precision, water resistance, moisture resistance, fast delivery cycle and low price, but has the defect of poor strength and toughness, a 3D printing material which can enable a model to have good appearance glossiness, high abrasion resistance and long service life is urgently needed to be designed.
Disclosure of Invention
In order to solve the problems, the problem that the strength and the toughness of the photosensitive resin are slightly poor is solved, so that the obtained printed model has good appearance glossiness, high abrasion resistance and long service life; oyster shell powder and photosensitive resin are used as materials for 3D printing.
In order to achieve the effect, the invention designs a preparation method of the oyster shell powder-reinforced 3D printing composite material.
A preparation method of an oyster shell powder enhanced 3D printing composite material comprises the following steps of;
s1, cleaning the surfaces of oyster shells;
s2, crushing and grinding;
s3, screening by using a 100-mesh sieve;
s4, dialyzing and removing impurities from the powder obtained in the step S3;
s5, drying the powder obtained in the step S4 to obtain powdered oyster shell powder;
s6, adding powdered oyster shell powder into photosensitive resin, and mixing and stirring to form a mixture;
s7, stirring for a period of time, and performing ultrasonic treatment to obtain a 3D printing composite material;
and S8, placing the 3D printing composite material into a trough of an SLA photosensitive resin 3D printer, and printing the composite material with the required shape.
Preferably, in step S1, the oyster shell surface is washed with 1M HCl low-concentration hydrochloric acid.
Preferably, in the step S3, the particle size of the crushed oyster shell powder is less than 150 μm.
Preferably, in the step S4, the powder obtained in S3 is placed in a dialysis bag and dialyzed with ultrapure water until pH < 10; the impurity removal is mainly to remove excessive alkali and chloride ions.
Preferably, in the step S5, the drying condition is at 60 ℃.
Preferably, in the step S6, the powdered oyster shell powder is mixed in a ratio of 5-20 wt% and the photosensitive resin is mixed in a ratio of 80-95 wt%.
Preferably, in the step S7, the stirring time is 2 hours; the ultrasonic treatment frequency is 10-50kHz, and the time is 1-3 hours.
The application has the advantages and effects as follows:
1. the preparation method of the oyster shell powder-reinforced 3D printing composite material can achieve the technical effects that the fineness of a printing-formed model is high, the appearance gloss of a printing-formed finished product is good, the abrasion resistance is high, the hardness is strong, and the service life is long.
2. The preparation method of the oyster shell powder-reinforced 3D printing composite material uses oyster shells, the oyster shell resources are wide, the sources are rich, the materials are obtained from domestic garbage recovery, the ecological environment is not damaged, the cost is low, and meanwhile, the environmental protection is facilitated.
The foregoing description is only an overview of the technical solutions of the present application, so that the technical means of the present application can be more clearly understood and the present application can be implemented according to the content of the description, and in order to make the above and other objects, features and advantages of the present application more clearly understood, the following detailed description is made with reference to the preferred embodiments of the present application and the accompanying drawings.
The above and other objects, advantages and features of the present application will become more apparent to those skilled in the art from the following detailed description of specific embodiments thereof, as illustrated in the accompanying drawings.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts. Throughout the drawings, like elements or portions are generally identified by like reference numerals. In the drawings, elements or portions are not necessarily drawn to scale.
FIG. 1 is a flow chart of a preparation method of an oyster shell powder-reinforced 3D printing composite material;
FIG. 2 is an electron micrograph (a) and SEM-Mapping (b) of oyster shell powder (c) oxygen (d) carbon (e) sodium (e);
FIG. 3 is EDS spectrogram of oyster shell powder;
FIG. 4 is a diagram of a finished product printed by a method for preparing an oyster shell powder-reinforced 3D printing composite material;
FIG. 5 is a comparison of the hardness of the material compared to a finished printed product using only the photosensitive resin.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. In the following description, specific details such as specific configurations and components are provided only to help the embodiments of the present application be fully understood. Accordingly, it will be apparent to those skilled in the art that various changes and modifications may be made to the embodiments described herein without departing from the scope and spirit of the present application. In addition, descriptions of well-known functions and constructions are omitted in the embodiments for clarity and conciseness.
It should be appreciated that reference throughout this specification to "one embodiment" or "the embodiment" means that a particular feature, structure or characteristic described in connection with the embodiment is included in at least one embodiment of the present application. Thus, the appearances of the phrase "one embodiment" or "the present embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.
Further, the present application may repeat reference numerals and/or letters in the various examples. This repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed.
The term "and/or" herein is merely an association describing an associated object, meaning that three relationships may exist, e.g., a and/or B, may mean: a exists alone, B exists alone, and A and B exist at the same time, and the term "/and" is used herein to describe another association object relationship, which means that two relationships may exist, for example, A/and B, may mean: a alone, and both a and B alone, and further, the character "/" in this document generally means that the former and latter associated objects are in an "or" relationship.
The term "at least one" herein is merely an association relationship describing an associated object, and means that there may be three relationships, for example, at least one of a and B, may mean: a exists alone, A and B exist simultaneously, and B exists alone.
It is further noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion.
Example 1
Referring to fig. 1, this embodiment mainly describes a method for preparing an oyster shell powder-reinforced 3D printing composite material, which includes:
s1, cleaning the surfaces of oyster shells;
s2, crushing and grinding;
s3, screening by using a 100-mesh sieve;
s4, dialyzing and removing impurities from the powder obtained in the step S3;
s5, drying the powder obtained in the step S4 to obtain powdered oyster shell powder;
s6, adding powdered oyster shell powder into photosensitive resin, and mixing and stirring to form a mixture;
s7, stirring for a period of time, and performing ultrasonic treatment to obtain a 3D printing composite material;
and S8, placing the 3D printing composite material into a trough of an SLA photosensitive resin 3D printer.
Further, in step S1, the surface of the oyster shell is washed with 1M HCl low-concentration hydrochloric acid.
Further, in the step S3, the particle size of the crushed oyster shell powder particles is less than 150 microns.
Further, in the step S4, the powder obtained in the step S3 is placed in a dialysis bag and dialyzed with ultrapure water until the pH is less than 10; the impurity removal is mainly to remove excessive alkali and chloride ions.
Further, in the step S5, the drying condition is at 60 ℃.
Further, in the step S6, the oyster shell powder is mixed in a ratio of 5-20 wt% in powder form and the photosensitive resin is mixed in a ratio of 80-95 wt%.
Further, in the step S7, the stirring time is 2 hours; the ultrasonic treatment frequency is 10-50kHz, and the time is 1-3 hours.
Referring to fig. 3, fig. 3 is an EDS spectrum of oyster shell powder, which shows that the oyster shell powder contains more oxygen, carbon and calcium elements.
By combining the oxygen (c) carbon (D) calcium (e) sodium in the diagram (b) in the SEM-Mapping of FIG. 2, it is obvious that the elements in the oyster shell powder are uniformly distributed, and the method is suitable for preparing the 3D printing composite material.
The SEM electron micrograph of the oyster shell powder in a 3 micron state in FIG. 2(a) shows that the oyster shell powder is in a multi-layer flake-like crystal block shape, and does not destroy the microscopic crystal structure of the oyster shell, thereby further proving that the oyster shell powder of the present invention has the effect of hardness enhancement when compounded into 3D printing resin. After oyster shell powder particle size sets up to be less than 150 microns's sieve mesh, appear powdered on the macroscopic, be applicable to the 3D of the precision more than 150 microns and print.
According to the material preparation method, the printing forming model is high in fineness, the finished product after printing forming is good in appearance glossiness, high in abrasion resistance, strong in hardness and long in service life.
Referring to fig. 4, it can be seen that the printing effect of the present application is good, and compared with a carbon fiber material, the glossiness of the carbon fiber composite material is obviously superior to that of a carbon fiber composite material.
Oyster shell is used in this application, and oyster shell resource is extensive, and the source is abundant, and low in production cost is favorable to the environmental protection simultaneously, more does benefit to the popularization.
Example 2
Based on the above example 1, this example mainly introduces a method for testing the hardness of an oyster shell powder-enhanced 3D printing composite material by using a vickers hardness tester and the results are as follows:
s1, preparation before experiment
1. Inspection of the durometer accuracy: starting when no test piece is installed, checking the action condition of each mechanism, and then checking the indication value precision by using a standard Vickers hardness block;
2. preparation of the sample: the surface of the test piece is smooth, and the surface of the test piece is bright and clean during the manufacture of the test piece;
3. selecting a test table: the test piece can be stably placed on the test piece, and the surface is vertical to the pressure head;
4. selection of test force: the test force is selected according to the thickness of the test piece, the expected hardness and the depth of the hardened layer.
S2, testing step
1. Turning on a power switch, enabling a display screen to be bright, automatically entering a main page within about 5 seconds, and displaying related numerical values at the moment;
2. if the setting after starting up is not in accordance with the experimental conditions, please press an (OK) key to enter a selection menu to set the required experimental conditions, press the (OK) key and an up-down direction key to select the required setting, confirm to press the (OK) key, and finish the setting and return to the main page to press (START);
3. placing the object to be tested on a workbench, rotating a protective cover, selecting a 20-time or 40-time objective lens to be at the position of the object to be tested according to the requirement, observing the object by the eye close to an eyepiece, rotating a lifting hand wheel to adjust the object up and down until the surface of the object to be tested is imaged clearly, and finishing the focusing process;
4. rotating the protective cover anticlockwise, placing the pressure head at the position of the measured object, pressing a START key to START loading, and simultaneously starting filling a scroll bar below a screen until an instrument emits beep sound to indicate that loading and unloading are finished;
5. rotating the protective cover clockwise to enable the objective lens to be positioned at the position of a tested object, observing the indentation imaging from the eyepiece, adjusting a lifting hand wheel until the indentation imaging is clear, rotating drum wheels at two sides of the eyepiece to enable the inner sides of two scribed lines to approach infinitely, pressing down a (CLR) key, and determining and completing zero position;
6. reversely rotating the drum wheels at two sides of the heliostat, gradually separating the two scribed lines, rotating the left drum wheel to ensure that the inner side of the left scribed line is tangent to the left edge of the indentation, rotating the right drum wheel to ensure that the inner side of the right scribed line is tangent to the right edge of the indentation, pressing a button, and finishing the D1 measurement;
7. rotating the moon mirror by 90 degrees to rotate the drum wheel, enabling the inner side of the lower scribed line to be tangent with the edge below the indentation, rotating the measuring drum wheel to enable the inner side of the upper scribed line to be tangent with the edge above the sheet indentation, pressing the button to finish the D2 measurement, automatically calculating and displaying the hardness value by the instrument, and finishing the test;
please refer to fig. 5 for the test results. The hardness tests of the oyster shell powder, the photosensitive resin printing material and the photosensitive resin printing material show that the average hardness test results are respectively 6.0HV0.025 and 2.9HV0.025, which indicates that the hardness of the photosensitive material added with the oyster shell powder is improved by 106.8 percent. Through above-mentioned test, can obtain the hardness that the oyster shell powder reinforcing 3D that this application adopted prints the preparation method of combined material and prints far away and is higher than the photosensitive resin hardness of single use.
The above description is only a preferred embodiment of the present invention, and it is not intended to limit the scope of the present invention, and various modifications and changes may be made by those skilled in the art. Variations, modifications, substitutions, integrations and parameter changes of the embodiments may be made without departing from the principle and spirit of the invention, which may be within the spirit and principle of the invention, by conventional substitution or may realize the same function.
Claims (8)
1. The oyster shell powder-reinforced 3D printing composite material is characterized by comprising powdered oyster shell powder and photosensitive resin.
2. The preparation method of the oyster shell powder-reinforced 3D printing composite material as claimed in claim 1, wherein the preparation method comprises the following steps;
s1, cleaning the surfaces of oyster shells;
s2, crushing and grinding;
s3, screening by using a 100-mesh sieve;
s4, dialyzing and removing impurities from the powder obtained in the step S3;
s5, drying the powder obtained in the step S4 to obtain powdered oyster shell powder;
s6, adding powdered oyster shell powder into photosensitive resin, and mixing and stirring to form a mixture;
s7, stirring for a period of time, and performing ultrasonic treatment to obtain a 3D printing composite material;
and S8, placing the 3D printing composite material into a trough of an SLA photosensitive resin 3D printer, and printing the composite material with the required shape.
3. The method of claim 2, wherein in step S1, the surface of the oyster shell is washed with 1M HCL low-concentration hydrochloric acid.
4. The method for preparing an oyster shell powder-reinforced 3D printing composite material according to claim 2, wherein in step S3, the particle size of the crushed oyster shell powder particles is less than 150 microns.
5. The method of claim 2, wherein in step S4, the powder obtained in step S3 is placed in a dialysis bag and dialyzed with ultrapure water until pH < 10; the impurity removal is mainly to remove excessive alkali and chloride ions.
6. The method for preparing an oyster shell powder-reinforced 3D printing composite material according to claim 2, wherein the drying condition is at 60 ℃ in step S5.
7. The method of claim 2, wherein the oyster shell powder-reinforced 3D printing composite material is prepared by mixing 5-20 wt% of powdered oyster shell powder and 80-95 wt% of photosensitive resin in step S6.
8. The method for preparing an oyster shell powder-reinforced 3D printing composite material according to claim 1, wherein in the step S7, the stirring time is 2 hours; the ultrasonic treatment frequency is 10-50kHz, and the time is 1-3 hours.
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