CN107421995A - One kind is based on AgVO3Respiration transducer of nano wire and preparation method thereof - Google Patents
One kind is based on AgVO3Respiration transducer of nano wire and preparation method thereof Download PDFInfo
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- CN107421995A CN107421995A CN201710614210.3A CN201710614210A CN107421995A CN 107421995 A CN107421995 A CN 107421995A CN 201710614210 A CN201710614210 A CN 201710614210A CN 107421995 A CN107421995 A CN 107421995A
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- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
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Abstract
One kind is based on AgVO3Respiration transducer of nano wire and preparation method thereof, belong to functional material preparing technical field.The respiration transducer includes four-layer structure, is followed successively by flexible base board, electrode layer, AgVO from bottom to top3Nano wire functional layer and encapsulated layer, the sensor choose organic material of the modulus of elasticity for 1GPa~4GPa as flexible base board, use photoetching process to form electrode layer thereon, AgVO is then coated on electrode layer3Nano wire functional layer, is finally encapsulated using medical dressing, has obtained the respiration transducer of flexibility.Respiration transducer of the present invention uses the stepped construction of multilayer, and flexible base board has bendable folding endurance and stretch-resistance, ensure that the stable performance of sensor；Meanwhile compared with existing monitoring of respiration device, the respiratory intensity excursion that respiration transducer of the present invention is able to detect that is big, high sensitivity, there is good process controllability and repeatability, be advantageously implemented large-scale batch production.
Description
Technical field
The present invention relates to functional material preparing technical field, and in particular to one kind is based on AgVO3The preparation of nano-material
Method, and including based on AgVO3The structure fabrication of nano wire respiration transducer and the method for testing to human body respiration effect.
Background technology
Vanadic acid ag material is a kind of functional material for being widely used in optics, electricity and catalysis etc., according to silver, vanadium,
The difference of oxygen proportioning, can form different the Nomenclature Composition and Structure of Complexes, such as AgVO3、Ag3VO4、Ag2V4O11Deng.Wherein, AgVO3As vanadium
Better simply compound in the silver-colored series compound of acid, its preparation process is simple, and formation is mutually sufficiently stable, widely should have
Use prospect.
Breathing is basis for the survival of mankind, while the information such as the power of human body respiration and frequency and the various physiology of human body
Information is closely related, for example, compared with patient, the respiratory rate and respiratory intensity of normal human are below patient.This is indicated that
Respiratory rate and intensity are detected, can aid in and detect health changing condition in time, to respiratory dysfunction
Forewarning function is played etc. disease.At present, conventional breathing detection method has：The strain for breathing expanding-contracting action is measured；It is right
The pressure change that breathing gas enters outlet measures；And the temperature to breathing into outlet measures.AgVO3As one kind
The material of function admirable, will be to the health monitoring of human body for monitoring of respiration on the gas sensor of flexibility if can apply to
It is significant.
The content of the invention
The invention provides one kind to be based on AgVO3Respiration transducer of nano wire and preparation method thereof, the respiration transducer
Using the breathing detection mode of non-intrusion type, it is uncomfortable that long term monitoring will not also cause human body foreign body sense to bring, and to exhaling
Inhaling frequency, respiratory intensity etc. all has monitoring effect.
Technical scheme is as follows：
One kind is based on AgVO3The respiration transducer of nano wire, including four-layer structure, be followed successively by from bottom to top flexible base board,
Electrode layer, functional layer and encapsulated layer, wherein, the functional layer is AgVO3Nano wire.
Further, the flexible base board is the organic material that modulus of elasticity is 1GPa~4GPa, specially polyimides
(PI), polyethylene terephthalate (PET) etc.；The thickness of the flexible base board is 20~50 μm.
Further, the electrode layer is interdigital electrode, parallel pole etc., and the spacing between electrode is 50~200 μm；Institute
The material for stating electrode layer is that conductive material, the thickness such as gold, platinum are 90~120nm.
Further, the AgVO3Nano wire functional layer is prepared using following steps：A. respectively prepare 0.02~
0.03mol/L ammonium metavanadate (NH4VO3) solution and 0.02~0.03mol/L silver nitrate (AgNO3) solution；B. according to mole
Compare V：Ag=1:1 ratio, ammonium metavanadate solution and silver nitrate solution are mixed, and under 80~90 DEG C of heating water bath environment
Stir；C. the solution after step b is stirred is transferred in reactor, and 12~24h is reacted at 180~190 DEG C, is taken
The sample gone out is dried at 60~80 DEG C, you can obtains AgVO3Nano wire；D. AgVO step c obtained3Nano wire according to
0.5g AgVO3The ratio added in 10~15mL deionized waters is scattered in deionized water, forms AgVO3Nanowire dispersion,
Then it is evenly applied on electrode layer, is dried at 60~80 DEG C, obtains the functional layer of respiration transducer.
Further, the encapsulated layer is medical dressing, such as more poly film class dressing, hydrocolloid class dressing etc. can pass through
Oxygen, vapor and stop the film of particulate matter.Because there is medical dressing the gases such as oxygen, vapor can freely lead to
Cross, and the intransitable feature of the particulate matter in environment, therefore AgVO can be completely cut off well3Nano wire functional layer with it is outer
Boundary's environment, prevents AgVO3The harm that nano wire is come by human body suction belts.
One kind is based on AgVO3The preparation method of the respiration transducer of nano wire, comprises the following steps：
The preparation of step 1, flexible base board：Choose the organic material that modulus of elasticity is 1GPa~4GPa, such as polyimides
(PI), polyethylene terephthalate (PET) etc. is used as flexible base board；
The preparation of step 2, electrode layer：Prepare interdigital electrode or parallel pole on flexible substrates using photoetching process, make
For electrode layer；
The preparation of step 3, functional layer：AgVO is prepared using hydro-thermal method3Nano wire, step is coated on after being configured to dispersion liquid
On 2 obtained electrode layers, dry, form the functional layer of respiration transducer；
Step 4, encapsulation, obtain being based on AgVO3The respiration transducer of nano wire.
Further, the preparation process of functional layer described in step 3 is specially：A. prepare 0.02~0.03mol/L's respectively
Ammonium metavanadate (NH4VO3) solution and 0.02~0.03mol/L silver nitrate (AgNO3) solution；B. according to mol ratio V：Ag=1:1
Ratio, ammonium metavanadate solution and silver nitrate solution are mixed, and is stirred under 80~90 DEG C of heating water bath environment；c.
Solution after step b is stirred is transferred in reactor, and 12~24h is reacted at 180~190 DEG C, and the sample of taking-up exists
Dried at 60~80 DEG C, you can obtain AgVO3Nano wire；D. AgVO step c obtained3Nano wire is according to 0.5g AgVO3Add
The ratio entered in 10~15mL deionized waters is scattered in deionized water, forms AgVO3Nanowire dispersion, then uniformly coating
In on the electrode layer that step 2 obtains, dried at 60~80 DEG C, obtain the functional layer of respiration transducer.
Further, encapsulation uses medical dressing described in step 4, such as more poly film class dressing, hydrocolloid class dressing etc. can
The material of particulate matter is stopped with transmission oxygen, vapor.
Beneficial effects of the present invention are：
The invention provides a kind of respiration transducer of flexible wearable and preparation method thereof, the sensor chooses springform
The organic material for 1GPa~4GPa is measured as flexible base board, uses photoetching process to form electrode layer thereon, then in electrode
AgVO is coated on layer3Nano wire functional layer, is finally encapsulated using medical dressing, has obtained the respiration transducer of flexibility.The present invention
Respiration transducer uses the stepped construction of multilayer, and flexible base board has bendable folding endurance and stretch-resistance, ensure that the property of sensor
Can be stable；Meanwhile compared with existing monitoring of respiration device, the respiratory intensity that respiration transducer of the present invention is able to detect that changes model
Enclose greatly, high sensitivity, there is good process controllability and repeatability, be advantageously implemented large-scale batch production.
Brief description of the drawings
Fig. 1 is based on AgVO to be provided by the invention3The structural representation of the respiration transducer of nano wire；
Fig. 2 is the preparation method schematic flow sheet of embodiment respiration transducer；
Fig. 3 is the resistance v. temperature change curve of embodiment respiration transducer；
Fig. 4 is resistance-moisture curve of embodiment respiration transducer；
Fig. 5 be embodiment obtain based on AgVO3The respiration transducer of nano wire responds to the resistance variations of eupnea
Curve；
Fig. 6 be embodiment obtain based on AgVO3The respiration transducer of nano wire is too slow and tachypnea to breathing
Resistance variations response curve.
Embodiment
With reference to the accompanying drawings and examples, technical scheme is described in detail.
Embodiment
One kind is based on AgVO3The preparation method of the respiration transducer of nano wire, comprises the following steps：
The preparation of step 1, flexible base board：
It is 5 × 10mm that polyimides (PI) film of 25 μ m-thicks is cut into size2Size, and by PI film adhesive tapes
It is attached on sheet glass, sheet glass plays a part of support as hard substrate；
The preparation of step 2, electrode layer：
Interdigital electrode figure is prepared on the PI films of step 1 using photoetching process, wherein, electrode spacing is 100 μm, fork
It is 5 to refer to index, and electrode size is 3 × 5mm2；Then golden film of the magnetron sputtering method deposit thickness for 100nm, acetone cleaning are used
After obtain golden interdigital electrode, as electrode layer；
The preparation of step 3, respiration transducer functional layer：
A. 0.025mol/L ammonium metavanadate (NH is prepared respectively at normal temperatures4VO3) solution 240mL and 0.025mol/L
Silver nitrate (AgNO3) solution 240mL, two kinds of solution are mixed and stirred for uniformly in the environment of 80 DEG C；B. after stirring
Solution be transferred in reactor, 16h is reacted at 180 DEG C, the sample of taking-up is dried at 70 DEG C, you can obtains AgVO3Receive
Rice noodles；C. the AgVO for taking 0.5g steps b to obtain3Nano wire is ground into powder structure, adds in 10mL deionized waters, ultrasound
5min forms uniform AgVO3Nanowire dispersion, in faint yellow homogeneous solution state；D. band gold step 2 obtained is interdigital
The PI films of electrode, which are placed in, to be dried on platform (JB-1B), 80 DEG C of constant temperature, the AgVO that upper step is prepared3Nanowire dispersion take 1mL drops in
In golden interdigital electrode, dried at 70 DEG C, obtain the functional layer of respiration transducer.
Step 4, encapsulation：
Interconnection wire is drawn at the both ends of golden interdigital electrode, more poly film class dressing (3M Tegaderm) are cut into 5 ×
10mm2Size is covered in respiration transducer surface, then removes whole flexible device from sheet glass, that is, obtains being based on AgVO3
The respiration transducer of nano wire.
Below to being obtained in embodiment based on AgVO3The performance of the respiration transducer of nano wire is analyzed；
Using Agilent B2901A sources table to embodiment based on AgVO3The respiration transducer of nano wire varies with temperature
Caused by resistance variations measure.As a result as shown in figure 3, with the rise of temperature, the resistance of respiration transducer is also therewith
It is gradually increasing, it can be seen that when environment temperature is from when changing to 70 DEG C for 20 DEG C, the resistance value of device rises to from 180M Ω
210M Ω or so.Using Agilent B2901A sources table to embodiment based on AgVO3The respiration transducer of nano wire is with humidity
Resistance variations are measured caused by change.As a result as shown in figure 4, with the increase of humidity, the resistance of respiration transducer
It is significant to decline, and approximately linear reduction, often increase by 1% humidity after linear fit, resistance fall reaches 3.4M Ω.
In the respiratory of human body, exhaled gas and suck gas change mainly have temperature change, humidity change and gas into
Divide ratio change, as can be seen from the above results, respiration transducer of the present invention mainly changes sensitivity to humidity, and to temperature change
Response it is then relatively weaker.Therefore, experiment utilizes the temperature and humidity change in respiratory, reality during to human body respiration
Response is also tested, as a result as shown in Figure 5.When breathing no more, the sensor resistance works as people in 175M Ω or so
During body exhaled gas, by the comprehensive function of exhaled gas humidity and temperature, its resistance is reduced near 1M Ω sensor, works as people
During body incoming call gas, resistance returns near 175M Ω again；Multiple breath test can be seen that respiration transducer tool of the present invention
There is good Repeatability, and resistance difference more than the 170M Ω with sensor during air-breathing that exhale, it can sensitively reflect people
The respiratory rate of body and the situation of change of respiratory intensity.In addition, when respiration transducer of the present invention is as monitoring of respiration, to exhaling
Being drawn through mitigation tachypnea has sensitive reaction, as shown in fig. 6, when human body quickly breathes, the sensor can be sensitive
The change of respiratory rate is detected, change in resistance scope drops to 1M Ω or so from 20M Ω；When human body respiration frequency declines,
Too slow due to breathing, the vapor of characteristics of contaminated respiratory droplets is more, while the time of air-breathing is also longer, so that human body can during air-breathing
Again take back the vapor on device is as much as possible in human body so that the change in resistance scope of device is bigger.Can from Fig. 6
To see, when human body breathes at a slow speed, the change in resistance scope of device is near 80M Ω to 1M Ω.
Claims (9)
1. one kind is based on AgVO3The respiration transducer of nano wire, including four-layer structure, flexible base board, electrode are followed successively by from bottom to top
Layer, functional layer and encapsulated layer, wherein, the functional layer is AgVO3Nano wire.
2. according to claim 1 be based on AgVO3The respiration transducer of nano wire, it is characterised in that the flexible base board is
Modulus of elasticity is 1GPa~4GPa organic material, specially polyimides or polyethylene terephthalate.
3. according to claim 1 be based on AgVO3The respiration transducer of nano wire, it is characterised in that the flexible base board
Thickness is 20~50 μm.
4. according to claim 1 be based on AgVO3The respiration transducer of nano wire, it is characterised in that the electrode layer is fork
Refer to electrode or parallel pole, the material of electrode layer is gold or platinum, thickness are 90~120nm.
5. according to claim 1 be based on AgVO3The respiration transducer of nano wire, it is characterised in that the AgVO3Nanometer
Line functional layer is prepared using following steps：A. respectively prepare 0.02~0.03mol/L ammonium metavanadate solution and 0.02~
0.03mol/L silver nitrate solution；B. according to mol ratio V：Ag=1:1 ratio, by ammonium metavanadate solution and silver nitrate solution
Mixing, and stirred under 80~90 DEG C of heating water bath environment；C. the solution after step b is stirred is transferred to reaction
In kettle, 12~24h is reacted at 180~190 DEG C, the sample of taking-up is dried at 60~80 DEG C, you can obtains AgVO3Nanometer
Line；D. AgVO step c obtained3Nano wire is according to 0.5g AgVO3The ratio added in 10~15mL deionized waters is scattered in
In deionized water, AgVO is formed3Nanowire dispersion, then it is evenly applied on electrode layer, dries, obtain at 60~80 DEG C
The functional layer of respiration transducer.
6. according to claim 1 be based on AgVO3The respiration transducer of nano wire, it is characterised in that the encapsulated layer is can
Stop the film of particulate matter through oxygen or vapor, the specially more dressing of poly film class or hydrocolloid class dressing.
7. one kind is based on AgVO3The preparation method of the respiration transducer of nano wire, comprises the following steps：
The preparation of step 1, flexible base board：Selection modulus of elasticity is 1GPa~4GPa organic material as flexible base board；
The preparation of step 2, electrode layer：Interdigital electrode or parallel pole are prepared on flexible substrates using photoetching process, as electricity
Pole layer；
The preparation of step 3, functional layer：AgVO is prepared using hydro-thermal method3Nano wire, obtained after being configured to dispersion liquid coated on step 2
Electrode layer on, drying, form the functional layer of respiration transducer；
Step 4, encapsulation, obtain being based on AgVO3The respiration transducer of nano wire.
8. according to claim 7 be based on AgVO3The preparation method of the respiration transducer of nano wire, it is characterised in that step
The preparation process of 3 functional layers is specially：A. respectively prepare 0.02~0.03mol/L ammonium metavanadate solution and 0.02~
0.03mol/L silver nitrate solution；B. according to mol ratio V：Ag=1:1 ratio, by ammonium metavanadate solution and silver nitrate solution
Mixing, and stirred under 80~90 DEG C of heating water bath environment；C. the solution after step b is stirred is transferred to reaction
In kettle, 12~24h is reacted at 180~190 DEG C, the sample of taking-up is dried at 60~80 DEG C, you can obtains AgVO3Nanometer
Line；D. AgVO step c obtained3Nano wire is according to 0.5g AgVO3The ratio added in 10~15mL deionized waters is scattered in
In deionized water, AgVO is formed3Nanowire dispersion, then it is evenly applied on the electrode layer that step 2 obtains, at 60~80 DEG C
Lower drying, obtains the functional layer of respiration transducer.
9. according to claim 7 be based on AgVO3The preparation method of the respiration transducer of nano wire, it is characterised in that step
4 encapsulation stop the film of particulate matter using can pass through oxygen or vapor, the specially more dressing of poly film class or water
Colloidal type dressing.
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| CN108627267A (en) * | 2018-05-10 | 2018-10-09 | 北京工业大学 | A kind of temperature sensor based on nano silver wire network |
| CN109557141A (en) * | 2018-11-30 | 2019-04-02 | 湘潭大学 | A kind of titanium dioxide/silver vanadate nano heterojunction and its preparation method and application |
| CN111264946A (en) * | 2020-03-27 | 2020-06-12 | 西安工程大学 | Mask for detecting respiratory frequency of human body and detection method thereof |
| WO2023096626A1 (en) * | 2021-11-23 | 2023-06-01 | Hacettepe Universitesi Rektorluk | Respiration sensor system with nanocomposite structure |
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| CN108627267A (en) * | 2018-05-10 | 2018-10-09 | 北京工业大学 | A kind of temperature sensor based on nano silver wire network |
| CN109557141A (en) * | 2018-11-30 | 2019-04-02 | 湘潭大学 | A kind of titanium dioxide/silver vanadate nano heterojunction and its preparation method and application |
| CN109557141B (en) * | 2018-11-30 | 2021-01-15 | 湘潭大学 | Titanium dioxide/silver vanadate nano heterojunction and preparation method and application thereof |
| CN111264946A (en) * | 2020-03-27 | 2020-06-12 | 西安工程大学 | Mask for detecting respiratory frequency of human body and detection method thereof |
| WO2023096626A1 (en) * | 2021-11-23 | 2023-06-01 | Hacettepe Universitesi Rektorluk | Respiration sensor system with nanocomposite structure |
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