CN105318822A - Flexible strain sensor based on ultra-long tellurium microwire - Google Patents
Flexible strain sensor based on ultra-long tellurium microwire Download PDFInfo
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- CN105318822A CN105318822A CN201410313150.8A CN201410313150A CN105318822A CN 105318822 A CN105318822 A CN 105318822A CN 201410313150 A CN201410313150 A CN 201410313150A CN 105318822 A CN105318822 A CN 105318822A
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Abstract
The invention discloses a flexible strain sensor based on an ultra-long tellurium microwire, and the strain sensor comprises a sensing main body material, a packaging material, an electrode, and a flexible polymer matrix. According to the invention, the employed main body material is a single ultra-long tellurium microwire which is different from a conventional semiconductor material. In particular, the current response is high under a very small voltage when there is strain. The strain sensor is suitable for detection, employs the flexible polymer matrix, and can achieve a large strain range. The strain sensor can be used for the detection of the damage of the flexible polymer matrix, and the detection of strains in different direction.
Description
Technical field
The present invention relates to a kind of sensing device, particularly relate to a kind of flexible strain transducer based on overlength semiconductor tellurium micro wire.
background technology
Strain transducer is widely used in microelectromechanical-systems, and material damage detects, life science etc.Main utilization be piezoresistive effect and the piezoelectric effect of material.Piezoresistive effect refers to that material is when being under pressure, and resistance changes.Piezoelectric effect is due to after being stressed, and the polarization of electric charge produces voltage.Piezoelectric mainly detects voltage, but often voltage is very little, but also will apply very large compressive stress.Main semiconductor material in pressure drag material, the good semiconductor material of electric conductivity, when being subject to compressive stress, resistance variations, current signal is easily detected.
Tellurium (Te) is a kind of p-type elemental semiconductors, and it is the best nonmetallic materials of electric conductivity, and bandwidth is minimum, easily under extraneous physical condition, the transformation of resistance occurs.One-dimension oriented tellurium material can pass through water heat transfer.Have a lot of scholar to successfully synthesize tellurium nano-wire or nanometer rods, the present invention has synthesized the tellurium micro wire of overlength, utilizes its semiconductor pressure resistance effect, is successfully prepared strain transducer.
Pressure drag material is the change producing resistance when being subject to compressive strain, as zinc paste, and the materials such as gallium nitride.Tellurium bandwidth is little compared with these materials, and electric conductivity is also good compared with these materials.It just can be tested with no current change under very little voltage, thus determines the generation of strain.In the damage check of microelectromechanical-systems and material, dynamometry, can play better use in weight.
The essential structure of existing resistance strain gage is generally made up of sensitive grid, substrate, cover plate, lead-in wire etc.Sensitive grid forms palisade by the filament bend of high resistivity, is the non-sensitive part that resistance strain gage experiences component strain.Device is complicated, and cost is higher.And have strict demand to the direction of strain, need to make sensitive grid generation deformation in a certain direction, and deformation variable quantity requires high.Flexible strain transducer of the present invention, in generation compressive strain and tensile strain, as long as and have strain to occur from all directions, all have the change of electric current.
Summary of the invention
The object of the invention is to the problem solving prior art, and a kind of flexible strain transducer detecting small strain is provided.
Technical scheme of the present invention is: a kind of flexible strain transducer, this flexible strain transducer comprises flexible polymer substrate, be arranged on the material of main part on described property polymeric matrix, and the two end electrodes of material of main part and encapsulating material, wherein, described material of main part is the tellurium semiconductor microactuator rice noodles adopting the single overlength of water heat transfer, and length is at 1-5 millimeter, and diameter is 30-50 micron; Described electrode is silver slurry or conducting resinl.
Further, described encapsulating material is epoxy resin or dimethyl silicone polymer.
Further, described flexible polymer substrate is tygon PS, polypropylene PP or Kynoar PVDF.
Further, the concrete steps of the tellurium semiconductor microactuator rice noodles of the single overlength of described employing water heat transfer are as follows:
The concentration that the tellurium dioxide of 0.001mol or llurate are dissolved in 30ml by step 1. is be placed in beaker in the sodium hydroxide solution of 1mol/L, obtains A mixed liquor, for subsequent use;
The concentration that the sodium borohydride of 0.15g or potassium borohydride are dissolved in 30ml by step 2. is in the sodium hydroxide solution of 1mol/L, is placed in beaker, adds 0.5g sodium dodecylsulphonate, fully stirs, and obtains B mixed liquor, for subsequent use;
After A mixed liquor mixes with B mixed liquor by step 3., abundant stirring, pour in the liner of 100ml teflon, add deionized water and be diluted to 80ml, close the lid, put into stainless steel cauldron, be 175 DEG C-185 DEG C in temperature and react 20-24 hour, after reaction terminates, washing, filter, drying obtains tellurium micro wire.
The present invention has following effect:
1), under proving installation provided by the present invention can be implemented in varying environment, the small strain of generation detects, and the increase and decrease of real-time judge strain.
2) strain sensing material preparation provided by the present invention is simple, and cost is lower.Addition is all be applicable to the liner that volume is the teflon of 100ml.
Accompanying drawing explanation
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 is the current-responsive curve that the flexible strain transducer of the present invention implements when straining.
In figure:
1. the single tellurium micro wire of overlength, 2. encapsulating material, 3. electrode material, 4. flexible polymer substrate.
Embodiment
Below in conjunction with the drawings and specific embodiments, the invention will be further described.
In the present invention prepared by the tellurium micro wire hydro-thermal method of overlength, and the concentration that the tellurium dioxide of 0.001mol is dissolved in 30ml by step 1. is be placed in beaker in the sodium hydroxide solution of 1mol/L, obtains A mixed liquor, for subsequent use;
The concentration that the sodium borohydride of 0.15g is dissolved in 30ml by step 2. is in the sodium hydroxide solution of 1mol/L, is placed in beaker, adds 0.5g dodecyl sodium sulfonate, fully stirs, and obtains B mixed liquor, for subsequent use;
After A mixed liquor mixes with B mixed liquor by step 3., abundant stirring, pour in the liner of 100ml teflon, add deionized water and be diluted to 80ml, close the lid, put into stainless steel cauldron, be 185 DEG C in temperature to react 24 hours, after reaction terminates, washing, filter, drying obtains tellurium micro wire.Accompanying drawing 1 is the scanning electron microscope (SEM) photograph of product, and its length is at 3 millimeters, and diameter is 30 microns.
The concentration that the llurate of 0.001mol is dissolved in 30ml by step 1. is be placed in beaker in the sodium hydroxide solution of 1mol/L, obtains A mixed liquor, for subsequent use;
The concentration that the potassium borohydride of 0.15g is dissolved in 30ml by step 2. is in the sodium hydroxide solution of 1mol/L, is placed in beaker, adds 0.5g dodecyl sodium sulfonate, fully stirs, and obtains B mixed liquor, for subsequent use;
After A mixed liquor mixes with B mixed liquor by step 3., abundant stirring, pour in the liner of 100ml teflon, add deionized water and be diluted to 80ml, close the lid, put into stainless steel cauldron, be 175 DEG C in temperature to react 20 hours, after reaction terminates, washing, filter, drying obtains tellurium micro wire.
Flexible strain transducer device of the present invention is prepared according to following step.Matrix material PS, PP, PVDF can by the corresponding preparations of hot pressing.Size can be changed as required, and in this instructions, device body is of a size of 40mm × 4mm × 1mm.The tellurium micro wire tweezers of overlength are positioned in polymeric matrix material.Electrode material such as silver slurry in two ends carries out bonding, and in 100 DEG C of vacuum annealings.Normal temperature encapsulation is carried out afterwards with epoxy resin or dimethyl silicone polymer.Accompanying drawing 2 is the schematic diagram of flexible strain transducer.
Flexible strain transducer in the present invention, being connected on voltage is in the circuit of 1V, when being subject to straining, such as during compressive strain, the resistance decreasing due to piezoresistive effect, its electric current is multiplied, and increase along with the increase of dependent variable, reduce along with the reduction of dependent variable.The current-responsive curve of accompanying drawing 3 when namely strain occurs for flexible strain transducer for this reason.
Claims (4)
1.
oneplant the flexible strain transducer based on overlength tellurium micro wire, it is characterized in that, this flexible strain transducer comprises flexible polymer substrate, be arranged on the material of main part on described property polymeric matrix, and the two end electrodes of material of main part and the encapsulating material for encapsulating, wherein, described material of main part is the tellurium semiconductor microactuator rice noodles adopting the single overlength of water heat transfer, length is at 1-5 millimeter, and diameter is 30-50 micron; Described electrode is silver slurry or conducting resinl.
2. flexible strain transducer as claimed in claim 1, is characterized in that, described encapsulating material is epoxy resin or dimethyl silicone polymer.
3. flexible strain transducer according to claim 1, is characterized in that: described flexible polymer substrate is tygon PS, polypropylene PP or Kynoar PVDF.
4. flexible strain transducer according to claim 1, it is characterized in that, the concrete steps of the tellurium semiconductor microactuator rice noodles of the single overlength of described employing water heat transfer are as follows: the concentration that the tellurium dioxide of 0.001mol or llurate are dissolved in 30ml by step 1. is be placed in beaker in the sodium hydroxide solution of 1mol/L, obtain A mixed liquor, for subsequent use;
The concentration that the sodium borohydride of 0.15g or potassium borohydride are dissolved in 30ml by step 2. is in the sodium hydroxide solution of 1mol/L, is placed in beaker, adds 0.5g dodecyl sodium sulfonate, fully stirs, and obtains B mixed liquor, for subsequent use;
After A mixed liquor mixes with B mixed liquor by step 3., abundant stirring, pour in the liner of 100ml teflon, add deionized water and be diluted to 80ml, close the lid, put into stainless steel cauldron, be 175 DEG C-185 DEG C in temperature and react 20-24 hour, after reaction terminates, washing, filter, drying obtains tellurium micro wire.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201410313150.8A CN105318822B (en) | 2014-07-02 | 2014-07-02 | A kind of flexible strain transducer based on overlength tellurium micro wire |
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| CN201410313150.8A CN105318822B (en) | 2014-07-02 | 2014-07-02 | A kind of flexible strain transducer based on overlength tellurium micro wire |
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| CN105318822A true CN105318822A (en) | 2016-02-10 |
| CN105318822B CN105318822B (en) | 2017-09-29 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 (4)
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|---|---|---|---|---|
| US20050034529A1 (en) * | 2003-05-07 | 2005-02-17 | Hongxing Tang | Strain sensors based on nanowire piezoresistor wires and arrays |
| 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 |
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2014
- 2014-07-02 CN CN201410313150.8A patent/CN105318822B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050034529A1 (en) * | 2003-05-07 | 2005-02-17 | Hongxing Tang | Strain sensors based on nanowire piezoresistor wires and arrays |
| 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 |
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| LEI GUAN等: "Utrasensitive room-temperature detection of N02，with tellurium nanotube based chemiresistive sensor", 《SENSORS AND ACTUATORS》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
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| CN105318822B (en) | 2017-09-29 |
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