CN108680190A - The flexible electronic sensor and preparation method prepared using the self-supporting Ag films of lysozyme welding - Google Patents
The flexible electronic sensor and preparation method prepared using the self-supporting Ag films of lysozyme welding Download PDFInfo
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- CN108680190A CN108680190A CN201810457198.4A CN201810457198A CN108680190A CN 108680190 A CN108680190 A CN 108680190A CN 201810457198 A CN201810457198 A CN 201810457198A CN 108680190 A CN108680190 A CN 108680190A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
- G01D5/12—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means
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- Measuring And Recording Apparatus For Diagnosis (AREA)
- Investigating Or Analyzing Materials By The Use Of Fluid Adsorption Or Reactions (AREA)
- Force Measurement Appropriate To Specific Purposes (AREA)
Abstract
The invention discloses a kind of flexible electronic sensor prepared by the self-supporting Ag films using lysozyme welding and preparation methods, patterned polydimethylsiloxanefilm film is built as mold using the lotus leaf surface with native micro-structures, bacteriolyze enzyme induction silver mirror reaction is utilized simultaneously, the self-supporting Ag films of lysozyme welding are formed in gas-liquid interface, then using patterned polydimethylsiloxanefilm film as flexible substrates and encapsulated layer, structure surface has the flexible sensor of micro-structure.Flexible sensor preparation process of the present invention is simple, it can induction pressure, strain and small vibrations, throat vibrations when such as speaking, it not only has high-flexibility, high stability and high sensitivity, fast response time, is expected to be applied to human motion detection, health monitoring systems, medical diagnostic equipment and the fields such as encryption information transmission and artificial throat.
Description
Technical field
The invention belongs to flexible electronic sensor technical fields, and in particular to one kind is for induction pressure, strain and small
The preparation method of the flexible sensor of vibrations and the sensor.
Background technology
Currently, many intelligentized detection devices use various sensors in large quantities, application is already
Penetrate into the side such as medical diagnosis, bioengineering, smart home, industrial production, marine exploration, environmental protection, space development
Aspect face.It is higher and higher with the application demand of information age, to each property such as range, precision and the stable cases of measured information
The desired value and idealization of energy parameter require to step up.
Novel sensor technology is to following trend development：Develop new material, new process and exploitation novel sensor；It realizes
The microminaturization of sensing technology hardware system and component.At the same time, it is desirable to sensor can also have it is flexible, extend, can be free
The features such as bending even folds, is easy to carry, wearable.With the development of flexible base material, it is special to meet above-mentioned all kinds of trend
The flexible sensor of point comes into being on this basis.
In recent years, popularizing with intelligent terminal, wearable electronic shows huge market prospects.People are
Marked improvement is achieved in wearable implantable sensor field, such as transmits skin tactile to brain using electronic skin and believes
Breath realizes that cerebral cortex controls artificial limb etc. using three-dimensional micro-electrode.Flexible wearable electronic sensor has light and portable, electricity
It is had excellent performance the features such as high with integrated level, becomes one of electric sensor of greatest concern.However, realizing flexible wearable
The high-resolution of electronic sensor, highly sensitive, quick response, low cost manufacturing and sophisticated signal detection are still one and prodigious choose
War especially incudes the small vibrations of throat when people speak to realize the induction of pitch signal.
Invention content
The purpose of the present invention is to provide it is a kind of using self-supporting two dimension Ag films prepare high-flexibility, high stability,
The preparation method of high sensor and the sensor.
It is prepared by following methods for above-mentioned purpose flexible sensor of the present invention：
1, using the lotus leaf surface with native micro-structures as mold, it is thin to build patterned dimethyl silicone polymer
Film.
2, the glucose solution by 0.02~0.2mg/mL Lysozyme in Aqueous Solution and mass fraction for 1%~3%, quality
The silver ammino solution that score is 1%~3% mixes in equal volume, is stored at room temperature 1~10 hour, and on mixed solution surface, one layer of formation is molten
The self-supporting Ag films of bacterium enzyme welding.
3, using patterned polydimethylsiloxanefilm film as flexible substrates, the self-supporting Ag films of lysozyme welding are turned
The non-patterned surface of the flexible substrates is moved on to, then cures flexible wire conductive silver paste in the both ends of Ag films, finally
Ag films are encapsulated with another patterned polydimethylsiloxanefilm film, and be used for the polydimethylsiloxanefilm film of encapsulation
Non-patterned surface is contacted with Ag films, obtains flexible sensor.
In above-mentioned steps 1, the specific construction method of patterned polydimethylsiloxanefilm film is：By new lotus leaf or with super
After the dried waterlily leaf surface that pure water is impregnated with completely is cleaned with ethyl alcohol and ultra-pure water successively, the water droplet of lotus leaf surface is dried, and is put down
Whole is attached to substrate surface, is then 9 by dimethyl siloxane and curing agent mass ratio:1 mixed liquor is spin-coated on lotus leaf surface,
Froth in vacuum 20~30 minutes, 70~80 DEG C cure 2~3 hours, and the dimethyl silicone polymer after solidification of tearing is patterned
Polydimethylsiloxanefilm film, thickness be 0.2~0.5mm.
In above-mentioned steps 2, the glucose water for being preferably 3% by 0.1~0.2mg/mL Lysozyme in Aqueous Solution and mass fraction
Solution, the silver ammino solution that mass fraction is 3% mix in equal volume, are stored at room temperature 2~3 hours, and one is formed on mixed solution surface
The thickness of the self-supporting Ag films of layer lysozyme welding, the self-supporting Ag films of the lysozyme welding is 150~300nm.
In above-mentioned steps 3, the cured temperature of conductive silver paste is 60~80 DEG C, and hardening time is 1~2 hour；It is described
Flexible wire is copper wire, and copper wire diameter is 0.3~0.5mm.
The present invention builds patterned polydimethylsiloxanes as mold using the lotus leaf surface with native micro-structures
Alkane film, while bacteriolyze enzyme induction silver mirror reaction is utilized, the self-supporting Ag films of lysozyme welding are formed in gas-liquid interface, then
Using patterned polydimethylsiloxanefilm film as flexible substrates and encapsulated layer, structure surface has the flexible sensing of micro-structure
Device.
Compared with prior art, the compliant conductive Ag films that flexible sensor of the present invention is welded using lysozyme are as conduction
As substrate and encapsulated layer, copper wire as flexible electrode, which can incude for layer, patterned polydimethylsiloxanefilm film
Pressure, strain and small vibrations, throat vibrations when such as speaking, not only have high-flexibility, high stability and sensitivity
High, fast response time is expected to be applied to human motion detection, health monitoring systems, medical diagnostic equipment and encryption information transmission
And the fields such as artificial throat.
Description of the drawings
Fig. 1 is the i-v curve of flexible sensor prepared by embodiment 1.
Fig. 2 is the current-time curvel of flexible sensor induction pressure prepared by embodiment 1.
Fig. 3 is the current-time curvel of flexible sensor sensitive surface external strain prepared by embodiment 1.
Fig. 4 is the current-time curvel of flexible sensor sensitive surface internal strain prepared by embodiment 1.
Fig. 5 is the current time of throat vibrations when flexible sensor induction tester prepared by embodiment 1 says different letters
Curve.
Specific implementation mode
The present invention is described in more detail with reference to the accompanying drawings and examples, but protection scope of the present invention is not limited only to
These embodiments.
Embodiment 1
1, so that lotus leaf is impregnated with completely about 5 hours in ultra-pure water dried waterlily leaf bubble, then use ethyl alcohol and ultra-pure water clear successively
It washes lotus leaf surface each 3 times, dries the water droplet of lotus leaf surface, and lain flat on the glass slide of 50mm × 20mm sizes；
It is 9 in mass ratio by dimethyl siloxane and the curing agent in DOW CORNING 184:Be spun on lotus leaf surface after 1 mixing, and by its in
De-bubble about 30 minutes is carried out in vacuum drying chamber, is cured 2 hours in 80 DEG C of baking ovens later, poly- two after careful solidification of tearing
Methylsiloxane, obtains patterned polydimethylsiloxanefilm film, and film thickness is about 0.5mm.
2,2mg lysozymes are added in 10mL ultra-pure waters, are configured to the Lysozyme in Aqueous Solution of 0.2mg/mL；By 0.3g D-
Glucose is added in ultra-pure water, is configured to the D-Glucose aqueous solution that mass fraction is 3%；Ultra-pure water is added in 0.3g silver nitrates
In, it is configured to the silver nitrate aqueous solution that mass fraction is 12%, it is that 12% silver nitrate aqueous solution is placed in take 2.5mL mass fractions
In 15mL PE pipes, ammonium hydroxide is added dropwise, is vibrated in drop, it is fixed with ultra-pure water until the precipitation initially generated just dissolves
Hold and obtains the silver ammino solution that mass fraction is 3% to 10mL；By 0.3mL 0.2mg/mL Lysozyme in Aqueous Solution, 0.3mL mass point
Number for 3% D-Glucose aqueous solution and 0.3mL mass fractions be 3% silver ammino solution be uniformly mixed, be added drop-wise to 18mm ×
It on the coverslip of 18mm, is stored at room temperature 2 hours, the self-supporting Ag films of one layer of lysozyme welding is formed on mixed liquor surface.
3, using patterned polydimethylsiloxanefilm film as flexible substrates, the self-supporting Ag films of lysozyme welding are turned
The non-patterned surface of the flexible substrates is moved on to, room temperature is dried, and then consolidates the flexible copper wire conductive silver paste of a diameter of 0.5mm
Change in the both ends of Ag films, solidification temperature is 80 DEG C, and hardening time is 2 hours.Finally with another patterned poly dimethyl
Siloxane film encapsulates Ag films, and the non-patterned surface of the polydimethylsiloxanefilm film for encapsulation connects with Ag films
It touches, obtains flexible sensor.
Using Shanghai Chen Hua CHI660E electrochemical workstations to the electric property of sensor, the performance of induction pressure, induction
The performance of face external strain is characterized, the result is shown in Figure 1~3.By Fig. 1~3 as it can be seen that the sensor have excellent electric conductivity,
The ability of induction pressure and the ability for tracking finger motion.
Using Shanghai Chen Hua CHI660E electrochemical workstations and puller system to the performance of the sensitive surface internal strain of sensor into
Row characterization, which is fixed in clamp of tensile machine, and is stretched in the face of progress 1000 times 30%, gained resistance cycle time
Number curve is as shown in figure 4, illustrate that the sensor has excellent tensility.
The property of the small vibrations of throat when being spoken to the induction people of sensor using Shanghai Chen Hua CHI660E electrochemical workstations
It can be characterized, which is attached at the Adam's apple of tester (female), and English words are read with normal quantity and speed respectively
Female Y, Z, gained current-time curvel is as shown in figure 5, illustrate the ability that the sensor has the induction small vibrations of Adam's apple.
Claims (8)
1. a kind of method that self-supporting Ag films using lysozyme welding prepare flexible electronic sensor, it is characterised in that the party
Method is made of following step：
(1) using the lotus leaf surface with native micro-structures as mold, patterned polydimethylsiloxanefilm film is built；
(2) glucose solution by 0.02~0.2mg/mL Lysozyme in Aqueous Solution and mass fraction for 1%~3%, quality point
Number mixes in equal volume for 1%~3% silver ammino solution, is stored at room temperature 1~10 hour, and one layer of bacteriolyze is formed on mixed solution surface
The self-supporting Ag films of enzyme welding；
(3) using patterned polydimethylsiloxanefilm film as flexible substrates, the self-supporting Ag films of lysozyme welding are shifted
Then flexible wire conductive silver paste is cured in the both ends of Ag films, is finally used by the surface non-patterned to the flexible substrates
Another patterned polydimethylsiloxanefilm film encapsulates Ag films, and the polydimethylsiloxanefilm film for encapsulation is not
Patterned surface is contacted with Ag films, obtains flexible sensor.
2. the self-supporting Ag films according to claim 1 using lysozyme welding prepare the side of flexible electronic sensor
Method, it is characterised in that：In step (1), the dried waterlily leaf surface being impregnated with completely by new lotus leaf or with ultra-pure water is used ethyl alcohol and is surpassed successively
After pure water cleaning, the water droplet of lotus leaf surface is dried, and lain flat on substrate surface, then by dimethyl siloxane and admittedly
Agent mass ratio is 9:1 mixed liquor is spin-coated on lotus leaf surface, froth in vacuum 20~30 minutes, and 70~80 DEG C of solidifications 2~3 are small
When, the dimethyl silicone polymer after solidification of tearing obtains patterned polydimethylsiloxanefilm film.
3. the self-supporting Ag films according to claim 2 using lysozyme welding prepare the side of flexible electronic sensor
Method, it is characterised in that：The thickness of the patterned polydimethylsiloxanefilm film is 0.2~0.5mm.
4. the self-supporting Ag films according to claim 1 using lysozyme welding prepare the side of flexible electronic sensor
Method, it is characterised in that：In step (2), the glucose water for being 3% by 0.1~0.2mg/mL Lysozyme in Aqueous Solution and mass fraction
Solution, the silver ammino solution that mass fraction is 3% mix in equal volume, are stored at room temperature 2~3 hours, and one is formed on mixed solution surface
The self-supporting Ag films of layer lysozyme welding.
5. the self-supporting Ag films according to claim 4 using lysozyme welding prepare the side of flexible electronic sensor
Method, it is characterised in that：The thickness of the self-supporting Ag films of the lysozyme welding is 150~300nm.
6. the self-supporting Ag films according to claim 1 using lysozyme welding prepare the side of flexible electronic sensor
Method, it is characterised in that：In step (3), the cured temperature of conductive silver paste is 60~80 DEG C, and hardening time is 1~2 hour.
7. the self-supporting Ag films according to claim 1 using lysozyme welding prepare the side of flexible electronic sensor
Method, it is characterised in that：In step (3), the flexible wire is copper wire, and copper wire diameter is 0.3~0.5mm.
8. the flexible electronic sensor that claim 1~7 any one method is prepared.
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| CN113491509A (en) * | 2021-06-17 | 2021-10-12 | 西安理工大学 | Preparation method of flexible electronic sensor |
| CN114674369A (en) * | 2022-03-24 | 2022-06-28 | 中国人民解放军国防科技大学 | Flexible sensing array with isotropy |
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