CN105318822B - A kind of flexible strain transducer based on overlength tellurium micro wire - Google Patents
A kind of flexible strain transducer based on overlength tellurium micro wire Download PDFInfo
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- CN105318822B CN105318822B CN201410313150.8A CN201410313150A CN105318822B CN 105318822 B CN105318822 B CN 105318822B CN 201410313150 A CN201410313150 A CN 201410313150A CN 105318822 B CN105318822 B CN 105318822B
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- tellurium
- strain transducer
- flexible
- overlength
- mixed liquors
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Abstract
A kind of flexible strain transducer based on overlength tellurium micro wire of the present invention, including sensing material of main part, encapsulating material, electrode and flexible polymer substrate.The material of main part that patent of the present invention is used is the tellurium micro wire of single overlength, semi-conducting material different from the past, mainly under the voltage of very little, current-responsive is high in the presence of having strain, it is adapted to detect for, and uses flexible substrate, it is possible to achieve very big range of strain.Detection when being damaged available for material matrix, the compression strain detecting of different directions.
Description
Technical field
Passed the present invention relates to a kind of sensing device, more particularly to a kind of flexible strain based on overlength semiconductor tellurium micro wire
Sensor.
Background technology
Strain transducer is widely used in microelectromechanical-systems, material damage detection, life science etc..What is mainly utilized is
The piezoresistive effect and piezo-electric effect of material.Piezoresistive effect refers to material when being under pressure, and resistance changes.Piezoelectricity is imitated
Should be due to that after being stressed, the polarization of electric charge produces voltage.Piezoelectric predominantly detects voltage, but often voltage very little, and
And also to apply very big compression.It is main in pressure drag material to use semi-conducting material, the preferable semi-conducting material of electric conductivity, by
When to compression, resistance variations, current signal is easily detected.
Tellurium（Te）It is a kind of p-type elemental semiconductorses, it is the best nonmetallic materials of electric conductivity, bandwidth pole
It is small, easily under extraneous physical condition, occur the transformation of resistance.One-dimension oriented tellurium material can be synthesized by hydro-thermal method.Have
Many scholars successfully synthesize tellurium nano-wire or nanometer rods, and the present invention has synthesized the tellurium micro wire of overlength, utilized its semiconductor pressure
Inhibition effect, is successfully prepared strain transducer.
Pressure drag material is to produce resistance when by compressive strain to be changed, such as zinc oxide, the material such as gallium nitride.Tellurium energy bandwidth
Degree is small compared with these materials, and electric conductivity is also good compared with these materials.It can just be tested with no current under the voltage of very little
Change, so that it is determined that the generation of strain.In the damage check of microelectromechanical-systems and material, dynamometry can be played more in weight
Good use.
The essential structure of existing resistance strain gage is typically made up of sensitive grid, substrate, cover plate, lead etc..Sensitive grid by
The filament bend of high resistivity forms palisade, is the non-sensitive part that resistance strain gage experiences component strain.Device is complicated, cost
It is higher.And there is strict demand, it is necessary to deform upon sensitive grid in a certain direction to the direction of strain, and deformation changes
Amount requires high.The flexible strain transducer of the present invention, is occurring compression strain and elongation strain, as long as and having from all directions
Strain occurs, and has the change of electric current.
The content of the invention
It is an object of the invention to solve problem of the prior art, and a kind of flexible strain for detecting small strain is provided and passed
Sensor.
The technical scheme is that：A kind of flexible strain transducer, the flexible strain transducer includes flexible polymer
Matrix, is arranged on the material of main part on the property polymeric matrix, and material of main part two end electrodes and encapsulating material, its
In, the material of main part is the tellurium semiconductor microactuator rice noodles that single overlength is synthesized using hydro-thermal method, and length is in 1-5 millimeter, diameter
For 30-50 micron；The electrode is silver paste or conducting resinl.
Further, the encapsulating material is epoxy resin or dimethyl silicone polymer.
Further, the flexible polymer substrate is polyethylene PS, polypropylene PP or Kynoar PVDF.
Further, the use hydro-thermal method synthesizes comprising the following steps that for the tellurium semiconductor microactuator rice noodles of single overlength：
It is molten for 1mol/L sodium hydroxide that 0.001mol tellurium dioxide or llurate are dissolved in 30ml concentration by step 1.
It is placed in liquid in beaker, obtains A mixed liquors, it is standby；
It is molten for 1mol/L sodium hydroxide that 0.15g sodium borohydride or potassium borohydride are dissolved in 30ml concentration by step 2.
In liquid, it is placed in beaker, adds 0.5g dodecyl sodium sulfates, be sufficiently stirred for, obtain B mixed liquors, it is standby；
After step 3. mixes A mixed liquors with B mixed liquors, it is sufficiently stirred for, in the liner for pouring into 100ml polytetrafluoroethylene (PTFE),
Add deionized water and be diluted to 80ml, close the lid, be put into stainless steel cauldron, be 175 DEG C of -185 DEG C of reaction 20-24 in temperature
Hour, after reaction terminates, wash, filtering is dried to obtain tellurium micro wire.
The present invention has the following effects that：
1）Test device provided by the present invention can realize that under various circumstances, the small strain of generation is detected,
And the increase and decrease of real-time judge strain.
2）Strain sensing material provided by the present invention is prepared simply, and cost is relatively low.Addition applies to volume
The liner of 100ml polytetrafluoroethylene (PTFE).
Brief description of the drawings
Fig. 1 is single semiconductor tellurium micro wire electron microscope picture in the present invention.
Fig. 2 is the structural representation of the flexible strain transducer of the present invention.
Fig. 3 implements current-responsive curve during strain for the flexible strain transducer of the present invention.
In figure：
1. the single tellurium micro wire of overlength, 2. encapsulating materials, 3. electrode materials, 4. flexible polymer substrates.
Embodiment
Below in conjunction with the drawings and specific embodiments, the invention will be further described.
The tellurium micro wire of overlength is prepared with hydro-thermal method in the present invention, and 0.001mol tellurium dioxide is dissolved in 30ml by step 1.
Concentration for 1mol/L sodium hydroxide solution in be placed in beaker, obtain A mixed liquors, it is standby；
0.15g sodium borohydride is dissolved in the sodium hydroxide solution that 30ml concentration is 1mol/L by step 2., is placed in burning
In cup, 0.5g dodecyl sodium sulfonates are added, is sufficiently stirred for, obtains B mixed liquors, it is standby；
After step 3. mixes A mixed liquors with B mixed liquors, it is sufficiently stirred for, in the liner for pouring into 100ml polytetrafluoroethylene (PTFE),
Add deionized water and be diluted to 80ml, close the lid, be put into stainless steel cauldron, being 185 DEG C in temperature reacts 24 hours, reaction
After end, wash, filtering is dried to obtain tellurium micro wire.Accompanying drawing 1 is the scanning electron microscope (SEM) photograph of product, and its length is at 3 millimeters, directly
Footpath is 30 microns.
0.001mol llurate is dissolved in the sodium hydroxide solution that 30ml concentration is 1mol/L by step 1. is placed in burning
In cup, A mixed liquors are obtained, it is standby；
0.15g potassium borohydride is dissolved in the sodium hydroxide solution that 30ml concentration is 1mol/L by step 2., is placed in burning
In cup, 0.5g dodecyl sodium sulfonates are added, is sufficiently stirred for, obtains B mixed liquors, it is standby；
After step 3. mixes A mixed liquors with B mixed liquors, it is sufficiently stirred for, in the liner for pouring into 100ml polytetrafluoroethylene (PTFE),
Add deionized water and be diluted to 80ml, close the lid, be put into stainless steel cauldron, being 175 DEG C in temperature reacts 20 hours, reaction
After end, wash, filtering is dried to obtain tellurium micro wire.
The flexible strain transducer device of the present invention is prepared as steps described below.Matrix material PS, PP, PVDF can be by warm
Corresponding powder is pressed to prepare.Size can be changed as needed, and device body size is 40mm × 4mm × 1mm in this specification.Will
The tellurium micro wire of overlength is positioned in polymeric matrix material with tweezers.Two ends are bonded with electrode material such as silver paste, and in
100 DEG C of vacuum annealings.Afterwards normal temperature encapsulation is carried out with epoxy resin or dimethyl silicone polymer.Accompanying drawing 2 is that flexible strain is passed
The schematic diagram of sensor.
Flexible strain transducer in the present invention, is connected in the circuit that voltage is 1V, when strained, and such as compression should
During change, due to piezoresistive effect, resistance diminishes, and its electric current is multiplied, and increases with the increase of dependent variable, with should
The reduction of variable and reduce.Accompanying drawing 3 is current-responsive curve when this flexible strain transducer is strained.
Claims (3)
1. a kind of flexible strain transducer, the flexible strain transducer includes flexible polymer substrate, it is arranged on described flexible poly-
Material of main part on compound matrix, and material of main part two end electrodes and encapsulating material for encapsulation, wherein, the main body
Material is the tellurium semiconductor microactuator rice noodles that single overlength is synthesized using hydro-thermal method, and length is in 1-5 millimeter, and a diameter of 30-50 is micro-
Rice；The electrode is silver paste or conducting resinl, it is characterised in that the use hydro-thermal method synthesizes the tellurium semiconductor micron of single overlength
The technique of line is comprised the following steps that：The concentration that 0.001mol tellurium dioxide or llurate are dissolved in 30ml is by step 1.
It is placed in 1mol/L sodium hydroxide solution in beaker, obtains A mixed liquors, it is standby；
0.15g sodium borohydride is dissolved in the sodium hydroxide solution that 30ml concentration is 1mol/L by step 2., is placed in beaker
In, 0.5g dodecyl sodium sulfonates are added, is sufficiently stirred for, obtains B mixed liquors, it is standby；
After step 3. mixes A mixed liquors with B mixed liquors, it is sufficiently stirred for, in the liner for pouring into 100ml polytetrafluoroethylene (PTFE), adds
Deionized water is diluted to 80ml, closes the lid, and is put into stainless steel cauldron, is that 175 DEG C of -185 DEG C of reaction 20-24 are small in temperature
When, after reaction terminates, wash, filtering is dried to obtain tellurium micro wire.
2. flexibility strain transducer as claimed in claim 1, it is characterised in that the encapsulating material is epoxy resin or poly- two
Methylsiloxane.
3. flexible strain transducer according to claim 1, it is characterised in that：The flexible polymer substrate is polyethylene
PS, polypropylene PP or Kynoar PVDF.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410313150.8A CN105318822B (en) | 2014-07-02 | 2014-07-02 | A kind of flexible strain transducer based on overlength tellurium micro wire |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410313150.8A CN105318822B (en) | 2014-07-02 | 2014-07-02 | A kind of flexible strain transducer based on overlength tellurium micro wire |
Publications (2)
| Publication Number | Publication Date |
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| CN105318822A CN105318822A (en) | 2016-02-10 |
| CN105318822B true CN105318822B (en) | 2017-09-29 |
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| CN201410313150.8A Expired - Fee Related CN105318822B (en) | 2014-07-02 | 2014-07-02 | A kind of flexible strain transducer based on overlength tellurium micro wire |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108577853A (en) * | 2018-04-27 | 2018-09-28 | 福州大学 | It is a kind of to be used to detect wearable strain transducer of human body joint motion and preparation method thereof |
| CN109450430A (en) * | 2018-12-28 | 2019-03-08 | 维沃移动通信有限公司 | A kind of key mould group and terminal |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102285634A (en) * | 2011-07-23 | 2011-12-21 | 北京科技大学 | Method for constructing flexible strain sensor based on ZnO micro/nano material |
| CN202329534U (en) * | 2011-11-17 | 2012-07-11 | 华中科技大学 | Flexible strain sensing device |
| CN103350988A (en) * | 2013-07-04 | 2013-10-16 | 中国石油大学(北京) | Single-crystal tellurium nanotube and preparation method and application thereof |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7302856B2 (en) * | 2003-05-07 | 2007-12-04 | California Institute Of Technology | Strain sensors based on nanowire piezoresistor wires and arrays |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102285634A (en) * | 2011-07-23 | 2011-12-21 | 北京科技大学 | Method for constructing flexible strain sensor based on ZnO micro/nano material |
| CN202329534U (en) * | 2011-11-17 | 2012-07-11 | 华中科技大学 | Flexible strain sensing device |
| CN103350988A (en) * | 2013-07-04 | 2013-10-16 | 中国石油大学(北京) | Single-crystal tellurium nanotube and preparation method and application thereof |
Non-Patent Citations (1)
| Title |
|---|
| Utrasensitive room-temperature detection of N02，with tellurium nanotube based chemiresistive sensor;Lei Guan等;《Sensors and Actuators》;20140630;正文第1-3节，图1-3 * |
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