CN107565012B - Preparation method of piezoelectric fiber composite material and piezoelectric fiber composite material - Google Patents
Preparation method of piezoelectric fiber composite material and piezoelectric fiber composite material Download PDFInfo
- Publication number
- CN107565012B CN107565012B CN201710767267.7A CN201710767267A CN107565012B CN 107565012 B CN107565012 B CN 107565012B CN 201710767267 A CN201710767267 A CN 201710767267A CN 107565012 B CN107565012 B CN 107565012B
- Authority
- CN
- China
- Prior art keywords
- piezoelectric
- fiber composite
- composite material
- polarized
- layer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Abstract
The invention provides a preparation method of a piezoelectric fiber composite material and the piezoelectric fiber composite material, and relates to the technical field of functional materials, wherein the preparation method of the piezoelectric fiber composite material comprises the following steps: cutting the unpolarized piezoelectric composite structure along the stacking direction to obtain a piezoelectric composite module; covering electrodes on a cutting surface of the piezoelectric composite module and polarizing to obtain a polarized piezoelectric composite module; stacking and arranging a plurality of polarized piezoelectric composite modules in a direction vertical to a cutting surface, and coating polymer glue solution on the adjacent surfaces to obtain a second laminated structure; and curing the second laminated structure to obtain a polarized piezoelectric composite structure, so that the technical problems of difficulty in sufficient polarization and reduction of the flexibility and stability of the composite material due to uneven polarization of piezoelectric fibers in the preparation process of the traditional piezoelectric fiber composite material are solved.
Description
Technical Field
The invention relates to the technical field of functional materials, in particular to a preparation method of a piezoelectric fiber composite material and the piezoelectric fiber composite material.
Background
The piezoelectric composite material is an intelligent composite material based on the mutual coupling effect between electric energy and mechanical energy, and has the characteristics of excellent piezoelectric property of a piezoelectric crystal material, flexibility of a polymer matrix and the like.
The piezoelectric composite material has various structures, is formed by compounding piezoelectric ceramic fibers and a polymer matrix, not only retains the advantages of high sensitivity, high-frequency response and the like of a piezoelectric crystal material, but also overcomes the defects of large brittleness and poor flexibility of the piezoelectric crystal material, has the characteristics of outstanding unidirectional performance, strong designability and the like, and is widely applied to the fields of sensing, driving, structure control, structure health monitoring, energy acquisition and the like.
At present, in the traditional piezoelectric fiber composite material preparation process, the piezoelectric fiber polarization is not uniform, so that sufficient polarization is difficult to realize, and the flexibility and the stability of the composite material are reduced.
Disclosure of Invention
In view of the above, the present invention provides a method for preparing a piezoelectric fiber composite material and a piezoelectric fiber composite material, so as to solve the technical problem that in the prior art, in the traditional piezoelectric fiber composite material preparation process, the polarization of piezoelectric fibers is not uniform, so that sufficient polarization is difficult to achieve, and thus the flexibility and stability of the composite material are reduced.
In a first aspect, an embodiment of the present invention provides a method for preparing a piezoelectric fiber composite material, including:
alternately stacking and arranging the piezoelectric thin layers and the polymer thin layers, and coating polymer glue solution on the adjacent surfaces to obtain a first laminated structure;
curing the first laminated structure to obtain an unpolarized piezoelectric composite structure;
cutting the unpolarized piezoelectric composite structure along the stacking direction to obtain a piezoelectric composite module;
covering electrodes on a cutting surface of the piezoelectric composite module and polarizing to obtain a polarized piezoelectric composite module;
stacking and arranging a plurality of polarized piezoelectric composite modules in a direction perpendicular to the cutting surface, and coating polymer glue solution on the adjacent surfaces to obtain a second laminated structure;
curing the second laminated structure to obtain a polarized piezoelectric composite structure;
cutting the polarized piezoelectric composite structure along a direction perpendicular to the piezoelectric thin layer and the cutting surface to obtain a polarized piezoelectric fiber composite layer;
and packaging the flexible interdigital electrode and the polarized piezoelectric fiber composite layer to obtain the piezoelectric fiber composite material.
With reference to the first aspect, an embodiment of the present invention provides a first possible implementation manner of the first aspect, where before the alternately stacking and arranging piezoelectric thin layers and polymer thin layers, and coating a polymer glue solution on adjacent surfaces to obtain a first stacked structure, the method further includes:
and preparing a piezoelectric ceramic or piezoelectric single crystal thin layer by a cutting method or a tape casting method to obtain the piezoelectric thin layer.
With reference to the first aspect, an embodiment of the present invention provides a second possible implementation manner of the first aspect, where before the alternately stacking and arranging piezoelectric thin layers and polymer thin layers, and coating a polymer glue solution on adjacent surfaces to obtain a first stacked structure, the method further includes:
the thin polymer layer is prepared from thermosetting resin by a compression molding method.
With reference to the first aspect, an embodiment of the present invention provides a third possible implementation manner of the first aspect, where an outermost layer of the unpolarized piezoelectric composite structure is the piezoelectric thin layer.
With reference to the first aspect, an embodiment of the present invention provides a fourth possible implementation manner of the first aspect, where the covering an electrode on a cutting surface of the piezoelectric composite module and performing polarization to obtain a polarized piezoelectric composite module specifically includes:
covering a layer of baking-free silver electrode on the cutting surface of the piezoelectric composite module, and polarizing along the direction vertical to the cutting surface;
and removing the electrode layer after polarization to obtain the polarized piezoelectric composite module.
With reference to the first aspect, an embodiment of the present invention provides a fifth possible implementation manner of the first aspect, where the stacking and arranging a plurality of the polarized piezoelectric composite modules in a direction perpendicular to the cutting surface, and coating a polymer glue solution on adjacent surfaces to obtain a second stacked structure specifically includes:
stacking and arranging a plurality of polarized piezoelectric composite modules in a direction perpendicular to the cutting surface, wherein the polarization directions of the adjacent polarized piezoelectric composite modules are opposite;
and coating polymer glue solution on the surfaces of the adjacent polarized piezoelectric composite modules to obtain a second laminated structure.
With reference to the first aspect, an embodiment of the present invention provides a sixth possible implementation manner of the first aspect, where before the encapsulating the flexible interdigital electrode and the polarized piezoelectric fiber composite layer to obtain a piezoelectric fiber composite material, the method further includes:
the flexible interdigital electrode is prepared by a single-layer printed circuit board technology.
With reference to the first aspect, an embodiment of the present invention provides a seventh possible implementation manner of the first aspect, where a flexible substrate material of the flexible interdigital electrode is polyimide;
the electrode material of the flexible interdigital electrode is metal copper.
With reference to the first aspect, an embodiment of the present invention provides an eighth possible implementation manner of the first aspect, where the encapsulating the flexible interdigital electrode and the polarized piezoelectric fiber composite layer to obtain a piezoelectric fiber composite material specifically includes:
in the process of packaging the flexible interdigital electrode and the polarized piezoelectric fiber composite layer, keeping the finger electrode center line of the flexible interdigital electrode and the interface of the adjacent polarized piezoelectric composite module on the same plane;
and packaging the flexible interdigital electrodes on two surfaces of the polarized piezoelectric fiber composite layer through polymer glue solution according to a mirror symmetry structure to obtain the modularized piezoelectric fiber composite material.
In a second aspect, embodiments of the present invention further provide a piezoelectric fiber composite material prepared by the method for preparing a piezoelectric fiber composite material according to the first aspect.
The technical scheme provided by the embodiment of the invention has the following beneficial effects: in the preparation method of the piezoelectric fiber composite material and the piezoelectric fiber composite material provided by the embodiment of the invention, the preparation method of the piezoelectric fiber composite material comprises the following steps: firstly, alternately stacking and arranging piezoelectric thin layers and polymer thin layers, coating polymer glue solution on adjacent surfaces to obtain a first stacked structure, then curing the first stacked structure to obtain an unpolarized piezoelectric composite structure, then cutting the unpolarized piezoelectric composite structure along the stacking direction to obtain a piezoelectric composite module, then covering electrodes on the cutting surface of the piezoelectric composite module and polarizing to obtain a polarized piezoelectric composite module, then stacking and arranging a plurality of polarized piezoelectric composite modules along the direction vertical to the cutting surface, coating polymer glue solution on the adjacent surfaces to obtain a second stacked structure, then curing the second stacked structure to obtain a polarized piezoelectric composite structure, then cutting the polarized piezoelectric composite structure along the direction vertical to the piezoelectric thin layers and the cutting surface, obtaining a polarized piezoelectric fiber composite layer, finally packaging the flexible interdigital electrode and the polarized piezoelectric fiber composite layer to obtain a piezoelectric fiber composite material, cutting an unpolarized piezoelectric composite structure along the stacking direction to form a piezoelectric composite module, polarizing the piezoelectric composite module on a cutting surface of the piezoelectric composite module to obtain the polarized piezoelectric composite module, stacking and arranging a plurality of polarized piezoelectric composite modules along the direction vertical to the cutting surface, subsequently cutting along the direction vertical to the piezoelectric thin layer and the cutting surface, and the like, so that the polarized cutting surface is uniformly distributed in each piezoelectric fiber composite layer, thereby obtaining the piezoelectric fiber composite layer with uniform polarization, cutting, polarizing, preparing the piezoelectric fiber composite material in a modularized manner, and the like, and realizing uniform polarization of the piezoelectric fiber composite material in the preparation process, the polarization is sufficient, so that the technical problems that in the traditional piezoelectric fiber composite material preparation process in the prior art, the piezoelectric fiber polarization is not uniform, the sufficient polarization is difficult to realize, and the flexibility and the stability of the composite material are reduced are solved.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a flow chart illustrating a method for manufacturing a piezoelectric fiber composite according to a first embodiment of the present invention;
FIG. 2 is a flow chart illustrating a method for preparing another piezoelectric fiber composite material according to a second embodiment of the present invention;
fig. 3 is a schematic structural diagram of a piezoelectric fiber composite layer in a piezoelectric fiber composite material provided in a third embodiment of the present invention;
fig. 4 shows a schematic structural diagram of a piezoelectric fiber composite material provided in the third embodiment of the present invention.
Icon: 1-a piezoelectric thin layer; 11-piezoelectric fibers; 2-a thin polymer layer; 22-polymer fibers; 3-an unpolarized piezoelectric composite structure; 4-a piezoelectric composite module; 5-cutting surface; 6-piezoelectric fiber composite layer after polarization; 7-flexible interdigital electrodes; 71-upper interdigitated electrodes; 72-lower interdigitated electrode.
Detailed Description
To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some, but not all embodiments of the present invention. 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.
Based on the fact that in the existing traditional piezoelectric fiber composite material preparation process, piezoelectric fibers are not polarized uniformly, and sufficient polarization is difficult to achieve, so that the flexibility and stability of the composite material are reduced, the piezoelectric fiber composite material preparation method and the piezoelectric fiber composite material provided by the embodiment of the invention can solve the technical problem that in the existing traditional piezoelectric fiber composite material preparation process, piezoelectric fibers are not polarized uniformly, sufficient polarization is difficult to achieve, and the flexibility and stability of the composite material are reduced.
For the convenience of understanding the present embodiment, a method for preparing a piezoelectric fiber composite material and a piezoelectric fiber composite material disclosed in the embodiments of the present invention will be described in detail.
The first embodiment is as follows:
as shown in fig. 1, the preparation method of the piezoelectric fiber composite material provided by the embodiment of the present invention includes:
s11: and alternately stacking and arranging the piezoelectric thin layers and the polymer thin layers, and coating polymer glue solution on the adjacent surfaces to obtain a first laminated structure.
In the step, a cutting method or a tape casting method can be adopted to prepare the piezoelectric ceramic or piezoelectric single crystal thin layer so as to obtain piezoelectric thin layers with different thicknesses. Thermosetting resins can be prepared into polymer sheets of different thicknesses by molding and the resulting polymer sheets can be cut to conform to the dimensions of the piezoelectric sheets, including length and width.
S12: and curing the first laminated structure to obtain an unpolarized piezoelectric composite structure.
As a preferred embodiment of this embodiment, the outermost layer of the unpolarized piezoelectric composite structure is a piezoelectric thin layer.
S13: and cutting the unpolarized piezoelectric composite structure along the stacking direction to obtain the piezoelectric composite module.
S14: and covering electrodes on the cutting surface of the piezoelectric composite module and polarizing to obtain the polarized piezoelectric composite module.
S15: and stacking and arranging a plurality of polarized piezoelectric composite modules in a direction vertical to the cutting surface, and coating polymer glue solution on the adjacent surfaces to obtain a second laminated structure.
S16: and curing the second laminated structure to obtain the polarized piezoelectric composite structure.
S17: and cutting the polarized piezoelectric composite structure along a direction vertical to the piezoelectric thin layer and the cutting surface to obtain the polarized piezoelectric fiber composite layer.
S18: and packaging the flexible interdigital electrode and the polarized piezoelectric fiber composite layer to obtain the piezoelectric fiber composite material.
The flexible substrate material of the flexible interdigital electrode can be polyimide, and the electrode material of the flexible interdigital electrode can be metal copper.
Therefore, the method provided by the embodiment of the invention is simple and feasible, can realize uniform polarization of the piezoelectric fibers in the composite material, enhances the flexibility and stability of the composite material, and effectively improves the preparation efficiency of the piezoelectric fiber composite material.
Example two:
as shown in fig. 2, the preparation method of the piezoelectric fiber composite material provided by the embodiment of the present invention includes:
s21: the piezoelectric ceramic or piezoelectric single crystal thin layer is prepared by a cutting method or a tape casting method to obtain the piezoelectric thin layer.
In this step, lead zirconate titanate (Pb (Zr)) is used as the piezoelectric ceramic in the case of the piezoelectric ceramic1-xTix)O3PZT) ceramic powder is used as a raw material, a traditional solid phase method is adopted to prepare piezoelectric ceramic in a cuboid shape, the size of the ceramic is 50mm × 30mm × 20mm (length × width × height), the piezoelectric ceramic is cut into piezoelectric thin layers along the height direction, the size of the piezoelectric thin layers is 50mm × 20mm × 0.3.3 mm (length × width × thickness), and the total number of the piezoelectric thin layers can be 10.
S22: the thermosetting resin is prepared into a polymer thin layer by a molding method.
For thermosetting resin, epoxy resin is used as a raw material, an epoxy resin glue solution is prepared by using a proper additive, a polymer thin layer with the thickness of 0.1mm is prepared by adopting a die pressing method, all the polymer thin layers are uniformly cut and processed into polymer thin layers with the size equivalent to that of a piezoelectric thin layer, namely 50mm × 20mm (length × width), and the total number of the polymer thin layers can be 9.
S23: and alternately stacking and arranging the piezoelectric thin layers and the polymer thin layers, and coating polymer glue solution on the adjacent surfaces to obtain a first laminated structure.
Specifically, the piezoelectric thin layers in step S23 are sequentially arranged from top to bottom, the polymer thin layers in step S22 are alternately inserted between adjacent piezoelectric thin layers, and a layer of epoxy resin glue is uniformly coated on both sides of the polymer thin layers and on the surface of the piezoelectric thin layer adjacent to the polymer thin layers.
S24: and curing the first laminated structure to obtain an unpolarized piezoelectric composite structure.
Further, the first laminated structure is subjected to hot-pressing curing, so that an unpolarized piezoelectric composite structure is obtained, and the unpolarized piezoelectric composite structure can also be a 2-2 type piezoelectric composite structure.
S25: and cutting the unpolarized piezoelectric composite structure along the stacking direction to obtain the piezoelectric composite module.
The 2-2 type piezoelectric composite structure in step S24 was cut in the vertical stacking direction at a pitch of 1mm, and several 2-2 type piezoelectric composite modules having a size of 20mm × 3.9.9 mm × 1mm (length × width × thickness) were obtained.
S26: and covering a layer of baking-free silver electrode on the cutting surface of the piezoelectric composite module, and polarizing along the direction vertical to the cutting surface.
And (5) covering a layer of baking-free silver electrode on the cut surface of the 2-2 type piezoelectric composite module layer in the step (S26), and polarizing under the action of an electric field of 3 kV/mm.
S27: and removing the electrode layer after polarization to obtain the polarized piezoelectric composite module.
And removing the electrode after polarization to obtain a polarized piezoelectric composite module, wherein the polarized piezoelectric composite module can also be a 2-2 type piezoelectric composite module.
S28: and stacking and arranging a plurality of polarized piezoelectric composite modules in a direction vertical to the cutting surface, wherein the polarization directions of the adjacent polarized piezoelectric composite modules are opposite.
And (5) taking out 10 pieces of the polarized 2-2 type piezoelectric composite modules in the step (S28) and stacking the pieces according to the original cutting positions, wherein the polarization directions of the adjacent 2-2 type piezoelectric composite modules are opposite.
S29: and coating polymer glue solution on the surfaces of the adjacent polarized piezoelectric composite modules to obtain a second laminated structure.
As a preferred embodiment of this embodiment, a layer of epoxy resin glue is uniformly coated on the adjacent cutting surfaces.
S30: and curing the second laminated structure to obtain the polarized piezoelectric composite structure.
Specifically, the second stacked structure is subjected to mold curing to obtain a polarized piezoelectric composite structure, and the polarized piezoelectric composite structure can also be a polarized 2-2 type piezoelectric composite structure, and the size of the polarized piezoelectric composite structure can be 20 × 10 × 3.9.9 mm.
S31: and cutting the polarized piezoelectric composite structure along a direction vertical to the piezoelectric thin layer and the cutting surface to obtain the polarized piezoelectric fiber composite layer.
The polarized 2-2 type piezoelectric composite structure in S30 is cut in the direction perpendicular to the piezoelectric thin layer and parallel to the polarization direction, and the cutting pitch may be 0.3mm, to obtain a polarized piezoelectric fiber composite layer having a size of 10mm × 3.9.9 mm × 0.3 mm.
S32: and preparing the flexible interdigital electrode by using a single-layer printed circuit board technology.
Preferably, the flexible interdigital electrode is prepared by adopting a printed circuit board technology, wherein the flexible substrate material can be polyimide, the electrode material can be metal copper, the center-to-center distance of the interdigital electrode can be 1mm, the electrode width can be 0.1mm, and the electrode thickness can be 0.02 mm.
S33: in the process of packaging the flexible interdigital electrode and the polarized piezoelectric fiber composite layer, the finger electrode center line of the flexible interdigital electrode and the interface of the adjacent polarized piezoelectric composite module are kept on the same plane.
And packaging the polarized piezoelectric fiber composite layer and the flexible interdigital electrode obtained in the steps S31 and S32, and keeping the finger electrode center line of the interdigital electrode and the interface of the adjacent 2-2 type piezoelectric composite module on the same plane in the packaging process.
S34: and packaging the flexible interdigital electrodes on two surfaces of the polarized piezoelectric fiber composite layer according to a mirror symmetry structure through polymer glue solution to obtain the modularized piezoelectric fiber composite material.
Therefore, the modular piezoelectric fiber composite material is obtained after the packaging is completed.
The preparation method of the modular piezoelectric fiber composite material provided by the embodiment of the invention can easily realize the preparation of the piezoelectric fiber composite layer, avoids the problem that a large-size piezoelectric block or thin layer is required to be used as a raw material when a continuous long fiber piezoelectric fiber composite material is prepared by a traditional preparation method, overcomes the problems of uneven piezoelectric fiber polarization, stress concentration and the like in the preparation process of the traditional piezoelectric fiber composite material, and can easily realize the serialization of the length of the piezoelectric fiber composite material through modular operation.
In this embodiment, the preparation method of the piezoelectric fiber composite material can realize uniform polarization of piezoelectric fibers in the composite material, can adjust the length of the piezoelectric fiber composite material in a modular manner, enhances the flexibility and stability of the composite material, effectively improves the preparation efficiency of the piezoelectric fiber composite material, and meets the application requirements of the piezoelectric fiber composite material in more fields.
Example three:
according to the piezoelectric fiber composite material provided by the embodiment of the invention, the piezoelectric fiber composite material can be prepared by the preparation method of the piezoelectric fiber composite material provided by the first embodiment or the second embodiment.
In this embodiment, PZT may be used as the piezoelectric phase, and the epoxy resin may be used as the polymer phase, and the method for preparing the piezoelectric fiber composite material provided in the above first embodiment or second embodiment may be used to prepare the piezoelectric fiber composite structure layer with a gradient structure.
As another embodiment of this embodiment, the method for preparing the piezoelectric fiber composite material can also be performed in the manner shown in fig. 3.
As shown in fig. 3, from top to bottom, piezoelectric thin layers 1 and polymer thin layers 2 are alternately stacked, the outermost layer is controlled to be the piezoelectric thin layer 1, a layer of polymer glue solution is uniformly coated on the surfaces of the polymer thin layer 2 adjacent to the piezoelectric thin layer 1, and then the laminated structure is pressurized and cured to obtain an unpolarized piezoelectric composite structure 3, or an unpolarized 2-2 type piezoelectric composite structure.
And cutting the unpolarized 2-2 type piezoelectric composite structure along the stacking direction to obtain the piezoelectric composite modules 4 with different thicknesses. As a preferable scheme, the piezoelectric composite module 4 may be a 2-2 type piezoelectric composite module, an electrode is coated and polarized on a cutting surface 5 of the 2-2 type piezoelectric composite module, and the electrode layer is removed after the polarization is completed. Wherein the thickness is a distance perpendicular to the cutting direction.
And (3) alternately stacking and arranging the polarized 2-2 type piezoelectric composite modules according to the polarization direction, uniformly coating a layer of polymer glue solution on the adjacent surfaces, and then carrying out mould pressing solidification on the laminated structure to obtain the polarized 2-2 type piezoelectric composite structure. And cutting the polarized 2-2 type piezoelectric composite structure along the direction which is vertical to the piezoelectric thin layer 1 and is parallel to the polarization direction to obtain a polarized piezoelectric fiber composite layer 6. Therefore, as shown in fig. 4, the piezoelectric fiber composite layer 6 after polarization includes the piezoelectric fibers 11 and the polymer fibers 22.
As shown in fig. 4, the flexible interdigital electrode 7 is prepared by a single-layer printed circuit board technology, and the center distance of the electrode is consistent with the thickness of the piezoelectric composite module 4, and the range is 0.1-5 mm.
The piezoelectric thin layer 1 with the serialized sizes is prepared by a cutting method or a tape casting method, the thickness range is 0.050-2mm, and other sizes are not limited. The polymer thin layer 2 with the serialized sizes is prepared by adopting a mould pressing method, the thickness range is 0.01-2mm, and other sizes are not limited.
The piezoelectric ceramic may be any one of piezoelectric ceramic systems such as PZT or barium titanate piezoelectric ceramic (BT for short). The piezoelectric single crystal may be any one of piezoelectric single crystal systems such as lead magnesium niobate-lead titanate (abbreviated as pmnt) or lead zinc niobate-lead titanate (abbreviated as PZNT).
The polymer sheet 2 or the polymer glue solution has the same composition, and can be any one of thermosetting polymers such as epoxy resin, phenolic resin or polyester resin. The length of the piezoelectric fiber composite layer can be multiple of the thickness of the 2-2 piezoelectric composite modules, and the range is 0.2-100 mm. Wherein the length of the piezoelectric fiber composite layer is along the direction of the fiber axis. The thickness of the piezoelectric fiber composite layer can be adjusted according to the distance of the knife used when the polarized 2-2 type piezoelectric composite structure is cut, and the range is 0.1-2 mm.
The center line of the finger electrode of the flexible interdigital electrode 7 and the interface between adjacent short fibers in the piezoelectric fiber composite layer, namely the interface of the bonding part of the polarized 2-2 piezoelectric composite module, are in a plane.
As shown in fig. 4, the piezoelectric fiber composite material is composed of a piezoelectric fiber composite layer and a flexible interdigital electrode 7, the piezoelectric fiber composite layer is prepared by a module combination method, and the flexible interdigital electrode 7 is encapsulated by polymer glue solution on two surfaces of the piezoelectric fiber composite layer in a mirror symmetry structure, so that the piezoelectric fiber composite material is obtained. Wherein, the interdigital electrodes include an upper interdigital electrode 71 and a lower interdigital electrode 72.
In the embodiment, the piezoelectric fiber composite material with multiple scales and wide adjustable range of the composite material length is manufactured by the small-size 2-2 type piezoelectric composite module, so that the structural parameters of the piezoelectric fiber composite material are accurately controllable. The width of the piezoelectric fiber 11 in the composite material is controlled by adjusting the thickness of the piezoelectric thin layer 1, and the adjustable range is 0.050-2 mm. The width of the polymer fiber 22 in the composite material is controlled by adjusting the thickness of the polymer thin layer 2, and the adjustable range is 0.01-2 mm. The thickness of the piezoelectric fiber composite layer is controlled within the range of 0.1-2mm by adjusting the distance between the cutting blades, and the thickness of the 2-2 type piezoelectric composite module is controlled within the range of 0.1-5 mm. The length of the composite material can be controlled by adjusting the number of the 2-2 type piezoelectric composite modules, and the adjustable range is 0.2-100 mm.
Unless specifically stated otherwise, the relative steps, numerical expressions and designations of the components and steps set forth in these embodiments do not limit the scope of the invention.
It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the system and the apparatus described above may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
In all examples shown and described herein, any particular reference should be construed as merely illustrative, and not a limitation, and thus other examples of example embodiments may have different references.
The flowchart and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of systems, methods and computer program products according to various embodiments of the present invention. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). It should also be noted that, in some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. It will also be noted that each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware-based systems which perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.
The piezoelectric fiber composite material provided by the embodiment of the invention has the same technical characteristics as the preparation method of the piezoelectric fiber composite material provided by the embodiment, so that the same technical problems can be solved, and the same technical effects can be achieved.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
Finally, it should be noted that: the above-mentioned embodiments are only specific embodiments of the present invention, which are used for illustrating the technical solutions of the present invention and not for limiting the same, and the protection scope of the present invention is not limited thereto, although the present invention is described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: any person skilled in the art can modify or easily conceive the technical solutions described in the foregoing embodiments or equivalent substitutes for some technical features within the technical scope of the present disclosure; such modifications, changes or substitutions do not depart from the spirit and scope of the embodiments of the present invention, and they should be construed as being included therein. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (8)
1. A method for preparing a piezoelectric fiber composite material is characterized by comprising the following steps:
alternately stacking and arranging the piezoelectric thin layers and the polymer thin layers, and coating polymer glue solution on the adjacent surfaces to obtain a first laminated structure;
curing the first laminated structure to obtain an unpolarized piezoelectric composite structure;
cutting the unpolarized piezoelectric composite structure along the stacking direction to obtain a piezoelectric composite module;
covering electrodes on a cutting surface of the piezoelectric composite module and polarizing to obtain a polarized piezoelectric composite module;
stacking and arranging a plurality of polarized piezoelectric composite modules in a direction perpendicular to the cutting surface, and coating polymer glue solution on the adjacent surfaces to obtain a second laminated structure;
curing the second laminated structure to obtain a polarized piezoelectric composite structure;
cutting the polarized piezoelectric composite structure along a direction perpendicular to the piezoelectric thin layer and the cutting surface to obtain a polarized piezoelectric fiber composite layer;
packaging the flexible interdigital electrode and the polarized piezoelectric fiber composite layer to obtain a piezoelectric fiber composite material;
the step of covering an electrode on a cutting surface of the piezoelectric composite module and polarizing the electrode to obtain a polarized piezoelectric composite module specifically includes:
covering a layer of baking-free silver electrode on the cutting surface of the piezoelectric composite module, and polarizing along the direction vertical to the cutting surface;
removing the electrode layer after polarization to obtain a polarized piezoelectric composite module;
the method comprises the following steps of stacking and arranging a plurality of polarized piezoelectric composite modules in a direction perpendicular to the cutting surface, and coating polymer glue solution on adjacent surfaces to obtain a second laminated structure, wherein the method specifically comprises the following steps:
stacking and arranging a plurality of polarized piezoelectric composite modules in a direction perpendicular to the cutting surface, wherein the polarization directions of the adjacent polarized piezoelectric composite modules are opposite;
and coating polymer glue solution on the surfaces of the adjacent polarized piezoelectric composite modules to obtain a second laminated structure.
2. The method for preparing a piezoelectric fiber composite material according to claim 1, further comprising, before the alternately stacking and arranging the piezoelectric thin layers and the polymer thin layers and coating the polymer glue solution on the adjacent surfaces to obtain the first lamination structure:
and preparing a piezoelectric ceramic or piezoelectric single crystal thin layer by a cutting method or a tape casting method to obtain the piezoelectric thin layer.
3. The method for preparing a piezoelectric fiber composite material according to claim 1, further comprising, before the alternately stacking and arranging the piezoelectric thin layers and the polymer thin layers and coating the polymer glue solution on the adjacent surfaces to obtain the first lamination structure:
the thin polymer layer is prepared from thermosetting resin by a compression molding method.
4. The method of claim 1, wherein the outermost layer of the unpolarized piezoelectric composite structure is the piezoelectric thin layer.
5. The method for preparing a piezoelectric fiber composite material according to claim 1, wherein before encapsulating the flexible interdigital electrode and the polarized piezoelectric fiber composite layer to obtain a piezoelectric fiber composite material, the method further comprises:
the flexible interdigital electrode is prepared by a single-layer printed circuit board technology.
6. The method for preparing the piezoelectric fiber composite material according to claim 1, wherein the flexible substrate material of the flexible interdigital electrode is polyimide;
the electrode material of the flexible interdigital electrode is metal copper.
7. The method for preparing a piezoelectric fiber composite material according to claim 1, wherein the flexible interdigital electrode and the polarized piezoelectric fiber composite layer are encapsulated to obtain the piezoelectric fiber composite material, and the method specifically comprises the following steps:
in the process of packaging the flexible interdigital electrode and the polarized piezoelectric fiber composite layer, keeping the finger electrode center line of the flexible interdigital electrode and the interface of the adjacent polarized piezoelectric composite module on the same plane;
and packaging the flexible interdigital electrodes on two surfaces of the polarized piezoelectric fiber composite layer through polymer glue solution according to a mirror symmetry structure to obtain the modularized piezoelectric fiber composite material.
8. A piezoelectric fiber composite material produced by the method for producing a piezoelectric fiber composite material according to any one of claims 1 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710767267.7A CN107565012B (en) | 2017-08-30 | 2017-08-30 | Preparation method of piezoelectric fiber composite material and piezoelectric fiber composite material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710767267.7A CN107565012B (en) | 2017-08-30 | 2017-08-30 | Preparation method of piezoelectric fiber composite material and piezoelectric fiber composite material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107565012A CN107565012A (en) | 2018-01-09 |
| CN107565012B true CN107565012B (en) | 2020-08-04 |
Family
ID=60978683
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710767267.7A Active CN107565012B (en) | 2017-08-30 | 2017-08-30 | Preparation method of piezoelectric fiber composite material and piezoelectric fiber composite material |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107565012B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110641091A (en) * | 2019-10-23 | 2020-01-03 | 嘉兴清锋新材料有限公司 | Lead-free piezoelectric ceramic fiber composite material and manufacturing process thereof |
| CN110828655B (en) * | 2019-11-15 | 2021-11-30 | 飞依诺科技(苏州)有限公司 | Ultrasonic probe, piezoelectric composite material wafer and preparation method thereof |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100401808B1 (en) * | 2001-11-28 | 2003-10-17 | 학교법인 건국대학교 | Curved Shape Actuator Device Composed of Electro Active Layer and Fiber Composite Layers |
| CN100530737C (en) * | 2007-03-12 | 2009-08-19 | 中国科学院声学研究所 | A high-frequency 3-3 compound piezoelectricity porcelain component |
| CN101596522B (en) * | 2009-06-25 | 2011-10-26 | 天津大学 | Inertial piezoelectric exciting device and implementation method |
| CN102509766B (en) * | 2011-09-28 | 2014-10-22 | 济南大学 | 1-3 type orthotropic cement-base piezoelectric composite material, and preparation method and application thereof |
| CN203344493U (en) * | 2013-07-23 | 2013-12-18 | 屈赛平 | Piezoelectric ceramics ink-jet module |
| CN105405964B (en) * | 2015-12-10 | 2019-07-23 | 武汉理工大学 | A kind of preparation method of piezoelectric fabric composite construction layer |
-
2017
- 2017-08-30 CN CN201710767267.7A patent/CN107565012B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN107565012A (en) | 2018-01-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4786837A (en) | Composite conformable sheet electrodes | |
| CN105405964B (en) | A kind of preparation method of piezoelectric fabric composite construction layer | |
| CN104821372B (en) | A kind of shearing-type piezo-electricity composite material | |
| TWI493983B (en) | A sound generator and an acoustic generating device using the same | |
| CN107565012B (en) | Preparation method of piezoelectric fiber composite material and piezoelectric fiber composite material | |
| CN102437282B (en) | Piezoelectric ceramic fibrous composite material and preparation method thereof | |
| CN110767799B (en) | Packaging method of interdigital electrode type piezoelectric fiber composite material | |
| CN107565013B (en) | Longitudinal gradient short fiber piezoelectric composite material and preparation method thereof | |
| JP6279769B2 (en) | Piezoelectric device | |
| CN108428783B (en) | Longitudinal gradient piezoelectric fiber composite material and preparation method thereof | |
| CN107527992B (en) | Bidirectional gradient short fiber piezoelectric composite material and preparation method thereof | |
| CN204596845U (en) | A kind of shearing-type Piezoelectric anisotropy structure | |
| CN107516710B (en) | Transverse gradient short fiber piezoelectric composite material and preparation method thereof | |
| CN107482113B (en) | Short fiber piezoelectric composite material and preparation method thereof | |
| CN109742228B (en) | Preparation method of piezoelectric composite material and actuator | |
| KR101612456B1 (en) | Piezo-electric fiber composite structure and piezo-electric film speaker using thereof | |
| US20240107888A1 (en) | Piezoelectric composite material, actuator, and preparation method of actuator | |
| JPS62104182A (en) | Manufacture of stacked piezoelectric material | |
| KR101577961B1 (en) | Piezo fiber composite structure | |
| CN210431862U (en) | Flexible membrane and transducer | |
| JP7293898B2 (en) | Piezoelectric element | |
| CN218868611U (en) | Piezoelectric composite ceramic material manufacturing structure | |
| KR101537939B1 (en) | Piezo ceramic fiber multi-layer composite device and manufacturing method of the same | |
| CN107507912A (en) | Piezoelectric fabric composite bed and preparation method thereof | |
| CN117769345A (en) | High-receiving-sensitivity piezoelectric composite material structure and preparation process thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |