CN108078543A - A kind of preparation method of high sensitivity electronic skin - Google Patents
A kind of preparation method of high sensitivity electronic skin Download PDFInfo
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- CN108078543A CN108078543A CN201711184092.3A CN201711184092A CN108078543A CN 108078543 A CN108078543 A CN 108078543A CN 201711184092 A CN201711184092 A CN 201711184092A CN 108078543 A CN108078543 A CN 108078543A
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/68—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient
- A61B5/6801—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient specially adapted to be attached to or worn on the body surface
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B2562/00—Details of sensors; Constructional details of sensor housings or probes; Accessories for sensors
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Abstract
A kind of high sensitivity electronic skin,With polyvinyl alcohol nano silver wire/graphene PDMS sandwich structures,The nano silver wire conductive network of one layer of mutually overlapping accumulation is formed on PET base material surface by way of spraying,Even application disperses one layer of graphene mixed by large stretch of graphene and small pieces graphene on nano silver wire network again afterwards,These graphenes are deposited on the nano silver wire that between nano silver wire network or unicom is adjacent,Further enhance the electric conductivity of conductive network,Afterwards,Using spin coating mode in above-mentioned conductive network surface spin coating layer of polyethylene alcoholic solution as the matrix of electronic skin,Finally,After polyvinyl alcohol drying,Composite membrane is separated from PET film,The composite membrane is transferred in baking oven,Overturn surface,One layer of PDMS film is deposited in the one side contacted with PET,It so can be obtained by a kind of electronic skin of sandwich structure.
Description
Technical field
The present invention relates to a kind of field of new materials, and in particular to a kind of preparation method of high sensitivity electronic skin.
Background technology
At present, growing with intellectual technology, with society, human being's production, the combination of life are more and more closer, right
Our influence is increasingly deepened, and unquestionably, intellectual technology, especially electronic skin will yield unusually brilliant results in medical field, than
Such as, the positions such as our clothes, skin are implanted by some wearable devices, it is possible to realize to the real-time of own physiological parameter
Monitoring is realized and accomplishes the functions such as networking and prediction in time, alarm at any time for our health index.
In order to realize the application early of above-mentioned wearable device, scientists from all over the world have carried out this deeply widely to grind at present
Study carefully, wherein, it is the most famous with the correlative study that Stanford University Bao Zhenan is taught, disclosed in 4 days July in 2016《It is natural
Material》（Nature Materials）Upper Summary writing article describes biological inspiration-electronics skin from human body in detail
Skin by the research to its mechanical performance, realizes the dermatoid perceptional function of class, and then, the signal that these are perceived changes
Corresponding matrix reaction, in this regard, having used the corresponding coding mode to carry out handling bionical signal, in addition, also describing manually
The possible candidate materials of electronic skin, finally, summarize to artificial electron's skin have great market potential, such as to cut-off or
Skin damage patient is extremely important.
Research of the country in this field has been also filled with competition, such as semiconductor superlattice country of Semiconductor institute, Chinese Academy of Sciences weight
Point laboratory Shen Guozhen seminars exist recently《The nanometer energy》（Nano Energy）On with " Ultrasensitive and
Ultraflexible e-skins with dual functionalities for wearable electronics " are topic
A research work that wearable device is used on electronic skin is delivered, human body can be directly attached to by developing one kind
The ultrathin flexible electronic skin array on surface, this electronic skin are realized by introducing polymer hollow ball nanostructured to ring
The ultra-high sensitive detection of border pressure, is quickly supervised available for being realized to physiological signals such as human pulse, voice, breathing, shell temperatures
Control in addition, this material has good subzero temperature inhibition effect, can also realize the efficient response to environment temperature, but this
Kind method needs to use the related process of semiconductor machining and transfer, this prepares its large-scale production extremely disadvantageous so that
It is too high to manufacture cost, market demands can not be met.
In addition, Chinese patent CN105671962A discloses a kind of flexible nano fiber base electronic skin and its preparation side
Method, the flexible nano tunica fibrosa which is crossed by two layers of conductive treatment are bonded, the thickness of flexible nano tunica fibrosa
For 30 ~ 500um, wherein, in the two sides to fit, at least one side has micro groove or micro-protuberance structure.It can solve existing
The problem of operating voltage is high in technology, power consumption is big and sensitivity is low；Have both the effect of sensitive layer and conductive grade；With good raw
Object compatibility, therefore can combine together well with human skin, convenient for being built into wearable device；In addition in the present invention
The nanostructured of electronic skin uniqueness so that sensitivity higher, stability that the equipment has are more preferable；Furthermore entire device is gently small
Dexterity has the advantages that easy to carry；But this method needs to prepare template, also having higher requirement to template, it is necessary to have recessed
Slot or micro-protuberance structure, and the demoulding is the sample for being easily damaged preparation.
The content of the invention
The present invention is in order to solve to prepare electronic skin complex process at present, the technical issues of cost is higher, by substantial amounts of
After development test, it is proposed that a kind of preparation method that can efficiently realize highly sensitive electronic skin on a large scale, this method energy
Enough quick realization industrialized productions, and the electronic skin prepared has preferable performance.
To achieve these goals, the present invention provides following technical solution, first, prepares electronic skin functional structure
Unit solution A；Secondly, the basal body structure unit solution B of electronic skin is prepared；Again, electronic skin upper table layer structure list is prepared
First body C, finally, by solution A, B, C in combination, you can obtain a kind of highly sensitive electronic skin.Specifically, it is by as follows
Scheme realize that step S1 prepares nano silver wire solution, wherein, nano silver wire selected as draw ratio is more than 1000, and diameter
High-quality nano silver wire less than 35nm；Graphene solution is prepared, wherein, graphene selected as sheet graphene and small pieces graphite
Alkene in mass ratio 2:1 admixes；Step S2, the basal body structure unit using polymeric as electronic skin, such as makes
Use polyvinyl alcohol（PVA）Basal body structure unit is done, prepares the PVA solution of suitable concentration；Step S3, using with chemical stability
Preferably, the excellent polymer of mechanical performance does electronic skin upper epidermis structural unit body, such as uses dimethyl silicone polymer
（PDMS）The preparation of electronic skin upper epidermis structural unit is realized by way of vapor deposition；Step S4, it is real by way of spin coating
The tissue of existing above-mentioned functional unit, obtains a kind of electronic skin with sandwich structure.
By mechanical performance to the electronic skin, the performance test of electric property, first, we have studied functional structures
Relation between unit content and electronic skin electrical conductivity, it has been found that for the electronic skin obtained by way of spin coating,
In its functional architecture unit content（Mf）For 0.1% when, electrical conductivity 5*10-6S/m, when functional architecture unit content（Mf）Increase
During to 5%, electrical conductivity 8*105S/m, and electronic skin at this time has good light translucency, this explanation uses this side
Electronic skin prepared by method has preferable electric property and optical property, due to us using polyvinyl alcohol as basal body structure
Unit, this causes the electronic skin prepared to have good mechanical performance, at this point, in order to further verify this electronic skin tool
There is market potential value, we are again tested its electrically susceptible performance, we use international gauge factor
（Gauge factor, G）To define its electrical sensitivity, the relation between expression resistance change rate and strain, corresponding G values
It is higher, then show that the electrical sensitivity of electronic skin is better, by the performance test of the material prepared to us, it has been found that
Its deformation can reach more than 200%, G values and be up to 25.
The principle of the present invention is, first, forms one layer of mutually overlapping accumulation on PET base material surface by way of spraying
Nano silver wire conductive network, even application disperses one layer by large stretch of graphene and small slabstone on nano silver wire network again afterwards
The graphene of black alkene mixing, these graphenes are deposited on the nano silver wire that between nano silver wire network or unicom is adjacent, further
Enhance the electric conductivity of conductive network, afterwards, using the mode of spin coating in above-mentioned conductive network surface spin coating layer of polyethylene alcohol
Matrix of the solution as electronic skin finally, after polyvinyl alcohol drying, composite membrane from PET film is separated, this is answered
Film transfer is closed into baking oven, overturns surface, one layer of PDMS film is deposited in the one side contacted with PET, so can be obtained by one
The electronic skin of kind of sandwich structure, since the electronic skin using nano silver wire and admixed graphite alkene does conductive element, this makes
It is obtained in deformation, since the relative displacement between conductive element is easier to occur, and then, show high sensitivity.
Compared with prior art, it is the device have the advantages that as follows：
The present invention does conductive structure primitive, list different from the past using the nano silver wire and graphene mixture of high-quality first
One constituent element, and using spraying and spin coating mode obtain composite membrane after, at a certain temperature using hydatogenesis mode most
The electronic skin of sandwich structure is obtained eventually；The electronic skin has good electric conductivity, mechanical performance and current sensitivity.
Description of the drawings
The scanning electron micrographs of Fig. 1 sandwich structure electronic skins of the present invention；
The current sensitivity test chart of Fig. 2 sandwich structure electronic skins of the present invention.
Specific embodiment
Embodiment 1
First compound concentration is the high-quality nano silver wire ethanol solution of 0.01mg/ml, and a piece of high temperature resistant PET is fixed on warm table
Film, it is the big of 0.01mg/ml to spray one layer of nano silver wire conductive network and then compound concentration in pet sheet face using spray gun
Graphene is deposited on above-mentioned nano silver wire conductive network by the mixed solution of piece and small pieces graphene, the similary mode using spraying
Surface obtains the nano silver wire conductive layer of graphene uniform covering, then, using the mode of spin coating, in above-mentioned conductive layer surface
Spin coating layer of polyethylene alkoxide polymer, after object to be polymerized drying, using tweezers from pet sheet face by the conductive structure and PET film
Separation, finally, which is transferred in baking oven, one layer of PDMS is deposited on its surface, after being cooled to room temperature, you can obtain
Sandwich structure electronic skin.
Embodiment 2
First compound concentration is the high-quality nano silver wire ethanol solution of 0.2mg/ml, and a piece of high temperature resistant PET is fixed on warm table
Film, it is the big of 0.05mg/ml to spray one layer of nano silver wire conductive network and then compound concentration in pet sheet face using spray gun
Graphene is deposited on above-mentioned nano silver wire conductive network by the mixed solution of piece and small pieces graphene, the similary mode using spraying
Surface obtains the nano silver wire conductive layer of graphene uniform covering, then, using the mode of spin coating, in above-mentioned conductive layer surface
Spin coating layer of polyethylene alkoxide polymer, after object to be polymerized drying, using tweezers from pet sheet face by the conductive structure and PET film
Separation, finally, which is transferred in baking oven, one layer of PDMS is deposited on its surface, after being cooled to room temperature, you can obtain
Sandwich structure electronic skin.
Embodiment 3
First compound concentration is the high-quality nano silver wire ethanol solution of 0.5mg/ml, and a piece of high temperature resistant PET is fixed on warm table
Film, it is the big of 0.1mg/ml to spray one layer of nano silver wire conductive network and then compound concentration in pet sheet face using spray gun
Graphene is deposited on above-mentioned nano silver wire conductive network by the mixed solution of piece and small pieces graphene, the similary mode using spraying
Surface obtains the nano silver wire conductive layer of graphene uniform covering, then, using the mode of spin coating, in above-mentioned conductive layer surface
Spin coating layer of polyethylene alkoxide polymer, after object to be polymerized drying, using tweezers from pet sheet face by the conductive structure and PET film
Separation, finally, which is transferred in baking oven, one layer of PDMS is deposited on its surface, after being cooled to room temperature, you can obtain
Sandwich structure electronic skin.
Although being disclosed by above example to the present invention, protection scope of the present invention is not limited thereto,
Under conditions of without departing from present inventive concept, deformation, replacement for done to above each component etc. will fall into the right of the present invention
In claimed range.
Claims (6)
1. a kind of high sensitivity electronic skin, it is characterised in that：The electronic skin has polyvinyl alcohol-nano silver wire/graphite
Alkene-PDMS sandwich structures, wherein, polyvinyl alcohol is compound using the mode of spin coating, and nano silver wire/graphene uses the side sprayed
Formula is compound, and PDMS is compound using the mode of vapor deposition.
2. a kind of preparation method of highly sensitive electronic skin as described in claim 1, it is characterised in that：First using spraying
Mode in one layer of nano silver wire conductive network of PET film surface spraying, then a layer graphene is sprayed on the conductive network, it
Afterwards, using the mode of spin coating on above-mentioned conductive layer surface compound layer of polyethylene alcohol, finally, after being separated from PET film
Conductive structure branch value baking oven in be deposited one layer of PDMS, you can obtain the electronic skin of sandwich structure.
3. a kind of preparation method of highly sensitive electronic skin as described in claim 1, it is characterised in that：The silver nanoparticle of spraying
Line concentration is the alcoholic solution of 0.01-0.5mg/ml, and the alcohol is one kind in ethyl alcohol, methanol or isopropanol.
4. a kind of preparation method of highly sensitive electronic skin as described in claim 1, it is characterised in that：The graphene of spraying
For large stretch of graphene and the mixture of small pieces graphene, wherein the mass ratio of large stretch of graphene and small pieces graphene is 1:1.
5. a kind of preparation method of highly sensitive electronic skin as described in claim 1, it is characterised in that：The spin coating be
Rotating speed is to be carried out under 180-500rpm.
6. a kind of preparation method of highly sensitive electronic skin as described in claim 1, it is characterised in that：The spraying refers to
Using hand gun, nozzle is directly 0.04mm, and heating platen temperature is 80-120 DEG C.
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| CN201711184092.3A CN108078543A (en) | 2017-11-23 | 2017-11-23 | A kind of preparation method of high sensitivity electronic skin |
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| CN201711184092.3A CN108078543A (en) | 2017-11-23 | 2017-11-23 | A kind of preparation method of high sensitivity electronic skin |
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Cited By (5)
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| CN109354009A (en) * | 2018-10-31 | 2019-02-19 | 西安交通大学 | A kind of preparation method of stretchable graphene film/silicon rubber sandwich structure electrode |
| CN109350045A (en) * | 2018-09-07 | 2019-02-19 | 东南大学 | A kind of manufacturing method of electrocardio flexible sensor |
| CN110057474A (en) * | 2019-03-01 | 2019-07-26 | 杭州电子科技大学 | A kind of novel copper-based aeroge-PDMS combined pressure type pressure sensing material and its application |
| CN110797140A (en) * | 2019-11-13 | 2020-02-14 | 东南大学 | Silver nanowire and graphene composite flexible transparent conductive film and preparation method thereof |
| CN111925776A (en) * | 2020-07-11 | 2020-11-13 | 西北工业大学 | Preparation method of polypyrrole nanowire interface modified three-dimensional graphene/PDMS composite photo-thermal material |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110057474A (en) * | 2019-03-01 | 2019-07-26 | 杭州电子科技大学 | A kind of novel copper-based aeroge-PDMS combined pressure type pressure sensing material and its application |
| CN110797140A (en) * | 2019-11-13 | 2020-02-14 | 东南大学 | Silver nanowire and graphene composite flexible transparent conductive film and preparation method thereof |
| CN111925776A (en) * | 2020-07-11 | 2020-11-13 | 西北工业大学 | Preparation method of polypyrrole nanowire interface modified three-dimensional graphene/PDMS composite photo-thermal material |
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