CN106519641A - Electrostrictive composite material, and preparation method and applications thereof - Google Patents
Electrostrictive composite material, and preparation method and applications thereof Download PDFInfo
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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
- C08K13/00—Use of mixtures of ingredients not covered by one single of the preceding main groups, each of these compounds being essential
- C08K13/04—Ingredients characterised by their shape and organic or inorganic ingredients
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L27/00—Materials for grafts or prostheses or for coating grafts or prostheses
- A61L27/02—Inorganic materials
- A61L27/025—Other specific inorganic materials not covered by A61L27/04 - A61L27/12
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L27/00—Materials for grafts or prostheses or for coating grafts or prostheses
- A61L27/02—Inorganic materials
- A61L27/08—Carbon ; Graphite
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L27/00—Materials for grafts or prostheses or for coating grafts or prostheses
- A61L27/02—Inorganic materials
- A61L27/10—Ceramics or glasses
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L27/00—Materials for grafts or prostheses or for coating grafts or prostheses
- A61L27/14—Macromolecular materials
- A61L27/18—Macromolecular materials obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L27/00—Materials for grafts or prostheses or for coating grafts or prostheses
- A61L27/50—Materials characterised by their function or physical properties, e.g. injectable or lubricating compositions, shape-memory materials, surface modified materials
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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
- C08K3/02—Elements
- C08K3/04—Carbon
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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
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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
- C08K7/00—Use of ingredients characterised by shape
- C08K7/02—Fibres or whiskers
- C08K7/04—Fibres or whiskers inorganic
- C08K7/14—Glass
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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
- C08K7/00—Use of ingredients characterised by shape
- C08K7/22—Expanded, porous or hollow particles
- C08K7/24—Expanded, porous or hollow particles inorganic
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L2430/00—Materials or treatment for tissue regeneration
- A61L2430/30—Materials or treatment for tissue regeneration for muscle reconstruction
-
- 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
- C08K2201/00—Specific properties of additives
- C08K2201/011—Nanostructured additives
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2203/00—Applications
- C08L2203/20—Applications use in electrical or conductive gadgets
Abstract
The invention provides an electrostrictive composite material, and a preparation method and applications thereof. The electrostrictive composite material is prepared from, by weight, 30 to 45 parts of TPU particle, 10 to 20 parts of carbon nano tube, 15 to 20 parts of nano-barium titanate, 10 to 20 parts of conductive carbon black, and 3 to 8 parts of glass fiber. According to the preparation method, interaction of the ingredients is realized, synergistic effect is achieved, the electrostrictive rate is as high as 20 to 25%, and the electrostrictive composite material can be applied in the field of functional material, and is promising in prospect.
Description
Technical field
The present invention relates to polymeric material field, more particularly to a kind of electrostrictive composite and preparation method thereof and
Using.
Background technology
Electrostriction composite material is that stretching motion is produced in the presence of electric field, so as to realize that electric energy-mechanic can turn
A kind of material for changing.Electrostriction composite material is as its electric energy-mechanic can be similar to the forms of motion of muscle in changing and be claimed
For artificial thews material.Material and device that electric energy-mechanic based on Electrostriction composite material of the prior art can be converted
In, described Electrostriction composite material is mainly formed with the material of one pack system, its driving voltage is higher, output stress compared with
It is little so that the also larger gap compared with muscle of its performance.
CN 101604727A disclose a kind of Electrostriction composite material, and which includes：One flexible macromolecule substrate, dispersion
Multiple what is said or talked about nanotubes in the flexible macromolecule substrate.Wherein, the Electrostriction composite material is still further comprised point
The multiple ceramic particles being dispersed in the flexible macromolecule substrate.The electrostriction rate of the material that the invention is prepared is only 1-
8%.
In the art, expect to obtain a kind of bigger composite of electrostriction rate.
The content of the invention
For the deficiencies in the prior art, it is an object of the invention to provide a kind of electrostrictive composite and its preparation
Methods and applications.
It is that, up to this purpose, the present invention is employed the following technical solutions：
On the one hand, the invention provides a kind of electrostrictive composite, the electrostrictive composite is main
Prepared by the raw material of following weight portion：
In the raw material of electrostrictive composite of the present invention, the consumption of the TPU granules is 30-45 weight
Part, such as 32 weight portions, 34 weight portions, 36 weight portions, 38 weight portions, 40 weight portions, 42 weight portions or 44 weight portions.
Preferably, the TPU granules are polyester-type TPU granules and/or polyether-type TPU granules.
In the raw material of electrostrictive composite of the present invention, the consumption of the CNT is 10-20 weights
Amount part, such as 11 weight portions, 12 weight portions, 13 weight portions, 14 weight portions, 15 weight portions, 16 weight portions, 17 weight portions, 18 weights
Amount part or 19 weight portions.
Preferably, the CNT is any in SWCN, double-walled carbon nano-tube or multi-walled carbon nano-tubes
It is a kind of or at least two combination.
In the raw material of electrostrictive composite of the present invention, the consumption of the nano barium phthalate is 15-20
Weight portion, such as 16 weight portions, 17 weight portions, 18 weight portions, 19 weight portions or 20 weight portions.
In the raw material of electrostrictive composite of the present invention, the consumption of the conductive black is 10-20 weights
Amount part, such as 11 weight portions, 12 weight portions, 13 weight portions, 14 weight portions, 15 weight portions, 16 weight portions, 17 weight portions, 18 weights
Amount part or 19 weight portions.
In the raw material of electrostrictive composite of the present invention, the consumption of the conductive black is 3-8 weight
Part, such as 3 weight portions, 3.5 weight portions, 4 weight portions, 4.5 weight portions, 5 weight portions, 5.5 weight portions, 6 weight portions, 6.5 weight
Part, 7 weight portions, 7.5 weight portions or 8 weight portions.
On the other hand, the invention provides the preparation side of electrostrictive composite as described in the first aspect of the invention
Method, methods described are that each material composition is pre-dried, mix homogeneously, and extrusion obtains the electrostrictive composite.
In the preparation method of electrostrictive composite of the present invention, the baking temperature is 50-60 DEG C, for example
50 DEG C, 51 DEG C, 52 DEG C, 53 DEG C, 54 DEG C, 55 DEG C, 56 DEG C, 57 DEG C, 58 DEG C, 59 DEG C or 60 DEG C, drying time is 1-2h.
In the preparation method of electrostrictive composite of the present invention, the extrusion is extruded using casting machine.
Preferably, each section of temperature setting of the casting machine is as follows：Barrel temperature is 130-140 DEG C；Filter screen temperature is
140-150℃；Elbow temperature is 150-160 DEG C；Connection temperature is 135-150 DEG C；Die head temperature is 150-165 DEG C.
As the preferred technical solution of the present invention, the preparation method of electrostrictive composite of the present invention include with
Lower step：
Each material composition is dried at 50-60 DEG C 1-2h in advance, mix homogeneously, Jing casting machines extrusion, casting machine it is each
Section temperature setting is as follows：Barrel temperature is 130-140 DEG C；Filter screen temperature is 140-150 DEG C；Elbow temperature is 150-160 DEG C；Even
Jointing temp is 135-150 DEG C；Die head temperature is 150-165 DEG C, obtains the electrostrictive composite.
On the other hand, the invention provides electrostrictive composite as described in the first aspect of the invention is in feature
The application of Material Field.For example, electrostrictive composite of the invention can be used for artificial muscle, electric sensitive material, sensing
The fields such as device.
Relative to prior art, the invention has the advantages that：
The present invention utilizes 30-45 weight portion TPU granules, 10-20 parts by weight of carbon nanotubes, 15-20 weight portion nano barium titanates
Barium, 10-20 weight portions conductive black and 3-8 parts by weight of glass fiber prepare Electrostriction composite material, between each component
Cooperate, synergism so that its electrostriction rate may be up to 20-25%, can be applicable to functional material field, with very
Good application prospect.
Specific embodiment
Technical scheme is further illustrated below by specific embodiment.
Embodiment 1
In the present embodiment, electrostrictive composite is mainly prepared by the raw material of following weight portion：
Preparation method is comprised the following steps：
Each material composition is dried at 50 DEG C 2h, mix homogeneously, Jing casting machines extrusion, each section of temperature of casting machine in advance
Arrange as follows：Barrel temperature is 140 DEG C；Filter screen temperature is 150 DEG C；Elbow temperature is 160 DEG C；Connection temperature is 135 DEG C；Die head
Temperature is 150 DEG C, obtains the electrostrictive composite.
Embodiment 2
In the present embodiment, electrostrictive composite is mainly prepared by the raw material of following weight portion：
Preparation method is comprised the following steps：
Each material composition is dried at 60 DEG C 1.5h in advance, mix homogeneously, Jing casting machines extrusion, each section of casting machine are warm
Degree arranges as follows：Barrel temperature is 140 DEG C；Filter screen temperature is 140 DEG C；Elbow temperature is 150 DEG C；Connection temperature is 150 DEG C；Mould
Head temperature is 165 DEG C, obtains the electrostrictive composite.
Embodiment 3
In the present embodiment, electrostrictive composite is mainly prepared by the raw material of following weight portion：
Preparation method is comprised the following steps：
Each material composition is dried at 55 DEG C 1h, mix homogeneously, Jing casting machines extrusion, each section of temperature of casting machine in advance
Arrange as follows：Barrel temperature is 135 DEG C；Filter screen temperature is 145 DEG C；Elbow temperature is 160 DEG C；Connection temperature is 135 DEG C；Die head
Temperature is 150 DEG C, obtains the electrostrictive composite.
Embodiment 4
In the present embodiment, electrostrictive composite is mainly prepared by the raw material of following weight portion：
Preparation method is comprised the following steps：
Each material composition is dried at 60 DEG C 1h, mix homogeneously, Jing casting machines extrusion, each section of temperature of casting machine in advance
Arrange as follows：Barrel temperature is 140 DEG C；Filter screen temperature is 145 DEG C；Elbow temperature is 155 DEG C；Connection temperature is 150 DEG C；Die head
Temperature is 165 DEG C, obtains the electrostrictive composite.
Embodiment 5
In the present embodiment, electrostrictive composite is mainly prepared by the raw material of following weight portion：
Preparation method is comprised the following steps：
Each material composition is dried at 50 DEG C 2h, mix homogeneously, Jing casting machines extrusion, each section of temperature of casting machine in advance
Arrange as follows：Barrel temperature is 130 DEG C；Filter screen temperature is 150 DEG C；Elbow temperature is 155 DEG C；Connection temperature is 150 DEG C；Die head
Temperature is 155 DEG C, obtains the electrostrictive composite.
Comparative example 1
This comparative example difference from Example 1 is to replace TPU granules with silicone elastomer, remaining raw material and raw material
Consumption and preparation method and condition are same as Example 1.
Comparative example 2
This comparative example difference from Example 1 is to replace nano barium phthalate with aluminium oxide, and remaining raw material is used with raw material
Amount and preparation method and condition it is same as Example 1.
Comparative example 3
This comparative example difference from Example 1 is not include carbon nanometer in the raw material of electrostrictive composite
Pipe and nano barium phthalate, remaining raw material and raw material dosage and preparation method are same as Example 1.
Comparative example 4
This comparative example difference from Example 1 is not include carbon nanometer in the raw material of electrostrictive composite
Pipe, the consumption of nano barium phthalate is 30 weight portions, and remaining raw material and raw material dosage and preparation method are same as Example 1.
Comparative example 5
This comparative example difference from Example 1 is not include nano-titanium in the raw material of electrostrictive composite
Sour barium, the consumption of CNT is 30 weight portions, and remaining raw material and raw material dosage and preparation method are same as Example 1.
Comparative example 6
This comparative example difference from Example 1 is not include conductive charcoal in the raw material of electrostrictive composite
It is black, remaining raw material and raw material dosage and preparation method it is same as Example 1.
Comparative example 7
This comparative example difference from Example 1 is not include conductive charcoal in the raw material of electrostrictive composite
It is black, remaining raw material and raw material dosage and preparation method it is same as Example 1.
Comparative example 8
This comparative example difference from Example 1 is not include conductive charcoal in the raw material of electrostrictive composite
Black, the consumption of CNT is 33 weight portions, and remaining raw material and raw material dosage and preparation method are same as Example 1.
Comparative example 9
This comparative example difference from Example 1 is not include conductive charcoal in the raw material of electrostrictive composite
Black, the consumption of nano barium phthalate is 33 weight portions, and remaining raw material and raw material dosage and preparation method are same as Example 1.
Comparative example 10
This comparative example difference from Example 1 is not include glass fibers in the raw material of electrostrictive composite
Dimension, remaining raw material and raw material dosage and preparation method are same as Example 1.
The Electrostriction composite material prepared to embodiment 1-5 and comparative example 1-10 applies 40 volts of voltage,
The electrostriction rate of material is determined, as a result as shown in table 1.
Table 1
As can be seen from Table 1, the electrostriction rate of electrostriction material prepared by embodiment of the present invention 1-5 is 20-25%,
And work as and replace TPU granules (comparative example 1) with silicone elastomer or replace nano barium phthalate with another kind of ceramic particle aluminium oxide
When (comparative example 2), the electrostriction rate of the electrostriction material for preparing is only 5-6%, and the substantially less than present invention is prepared into
The electrostriction rate of the Electrostriction composite material for arriving.Can be seen that in the present invention by contrast of the embodiment 1 with comparative example 3-10
Middle CNT and nano barium phthalate have a synergism for the electrostrictive property for improving material, and glass fibre plus
Enter for further improve material electrostrictive property also play certain effect, therefore, the present invention in each raw material components it
Between it is mutually coordinated, cooperate so that material electrostriction rate is significantly improved, the Electrostriction composite material of the present invention
Can be used for functional material field, be with a wide range of applications.
Applicant states that the present invention illustrates the electrostrictive composite and its system of the present invention by above-described embodiment
Preparation Method and application, but the invention is not limited in above-described embodiment, that is, do not mean that the present invention has to rely on above-described embodiment
Could implement.Person of ordinary skill in the field it will be clearly understood that any improvement in the present invention, to each raw material of product of the present invention
Equivalence replacement and the addition of auxiliary element, the selection of concrete mode etc., all fall within protection scope of the present invention and open scope
Within.
Claims (8)
1. a kind of electrostrictive composite, it is characterised in that the electrostrictive composite is mainly by following weight
The raw material of part is prepared：
2. electrostrictive composite according to claim 1, it is characterised in that the TPU granules are polyester-type TPU
Granule and/or polyether-type TPU granules.
3. electrostrictive composite according to claim 1 and 2, it is characterised in that the CNT is single wall
In CNT, double-walled carbon nano-tube or multi-walled carbon nano-tubes any one or at least two combination.
4. the preparation method of the electrostrictive composite according to any one of claim 1-3, it is characterised in that institute
The method of stating is that each material composition is pre-dried, mix homogeneously, and extrusion obtains the electrostrictive composite.
5. preparation method according to claim 4, it is characterised in that the baking temperature is 50-60 DEG C, drying time is
1-2h。
6. the preparation method according to claim 4 or 5, it is characterised in that the extrusion is extruded using casting machine；
Preferably, each section of temperature setting of the casting machine is as follows：Barrel temperature is 130-140 DEG C；Filter screen temperature is 140-150
℃；Elbow temperature is 150-160 DEG C；Connection temperature is 135-150 DEG C；Die head temperature is 150-165 DEG C.
7. the preparation method according to any one of claim 4-6, it is characterised in that the electrostrictive TPU film
Preparation method comprise the following steps：Each material composition is dried at 50-60 DEG C 1-2h, mix homogeneously, Jing casting machines in advance
Extrusion, each section of temperature setting of casting machine are as follows：Barrel temperature is 130-140 DEG C；Filter screen temperature is 140-150 DEG C；Elbow temperature
Spend for 150-160 DEG C；Connection temperature is 135-150 DEG C；Die head temperature is 150-165 DEG C, obtains the electrostrictive and is combined
Material.
8. application of the electrostrictive composite according to any one of claim 1-3 in functional material field.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611011492.XA CN106519641A (en) | 2016-11-17 | 2016-11-17 | Electrostrictive composite material, and preparation method and applications thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201611011492.XA CN106519641A (en) | 2016-11-17 | 2016-11-17 | Electrostrictive composite material, and preparation method and applications thereof |
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ID=58352132
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| CN201611011492.XA Pending CN106519641A (en) | 2016-11-17 | 2016-11-17 | Electrostrictive composite material, and preparation method and applications thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107141770A (en) * | 2017-06-26 | 2017-09-08 | 俞秀英 | A kind of electrostrictive composite and its preparation method and application |
| CN107177197A (en) * | 2017-06-30 | 2017-09-19 | 朱燕萍 | A kind of electrostrictive composite and its preparation method and application |
| CN108744030A (en) * | 2018-07-20 | 2018-11-06 | 西安理工大学 | A kind of injection-type piezoelectricity bone cement and preparation method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101781461A (en) * | 2009-01-16 | 2010-07-21 | 清华大学 | Electrostriction composite material and preparation method thereof |
| CN104987701A (en) * | 2015-07-22 | 2015-10-21 | 东莞市雄林新材料科技股份有限公司 | Electrostrictive TPU film and preparation method and application thereof |
| CN105199369A (en) * | 2015-10-29 | 2015-12-30 | 无锡市嘉邦电力管道厂 | Electrostrictive high-temperature-resisting TPU (thermoplastic polyurethane) film as well as preparation method and application thereof |
-
2016
- 2016-11-17 CN CN201611011492.XA patent/CN106519641A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101781461A (en) * | 2009-01-16 | 2010-07-21 | 清华大学 | Electrostriction composite material and preparation method thereof |
| CN104987701A (en) * | 2015-07-22 | 2015-10-21 | 东莞市雄林新材料科技股份有限公司 | Electrostrictive TPU film and preparation method and application thereof |
| CN105199369A (en) * | 2015-10-29 | 2015-12-30 | 无锡市嘉邦电力管道厂 | Electrostrictive high-temperature-resisting TPU (thermoplastic polyurethane) film as well as preparation method and application thereof |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107141770A (en) * | 2017-06-26 | 2017-09-08 | 俞秀英 | A kind of electrostrictive composite and its preparation method and application |
| CN107177197A (en) * | 2017-06-30 | 2017-09-19 | 朱燕萍 | A kind of electrostrictive composite and its preparation method and application |
| CN108744030A (en) * | 2018-07-20 | 2018-11-06 | 西安理工大学 | A kind of injection-type piezoelectricity bone cement and preparation method thereof |
| CN108744030B (en) * | 2018-07-20 | 2021-01-15 | 西安理工大学 | Injection type piezoelectric bone cement and preparation method thereof |
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Application publication date: 20170322 |