CN104739403B - Graphene nano wall flexibility electrocardioelectrode and preparation method thereof - Google Patents
Graphene nano wall flexibility electrocardioelectrode and preparation method thereof Download PDFInfo
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- CN104739403B CN104739403B CN201510168806.6A CN201510168806A CN104739403B CN 104739403 B CN104739403 B CN 104739403B CN 201510168806 A CN201510168806 A CN 201510168806A CN 104739403 B CN104739403 B CN 104739403B
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- graphene nano
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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
- A61B5/24—Detecting, measuring or recording bioelectric or biomagnetic signals of the body or parts thereof
- A61B5/25—Bioelectric electrodes therefor
Abstract
The invention discloses flexible electrocardioelectrode of a kind of graphene nano wall and preparation method thereof, the flexible electrocardioelectrode includes flexible substrate layer and graphene nano wall layers；The edge of the graphene nano wall layers scribbles one layer of conductive silver glue, and the conductive silver glue is connected with plain conductor.The flexible electrocardioelectrode of graphene nano wall that the present invention is obtained is fitted closer, the potential difference of collection is more accurate due to flexible more preferable with body surface；Also, the electrode impedance is low, and electric conductivity is excellent, polarization, anti-interference, antinoise are not likely to produce.In addition, the corrosion resistance of graphene can also greatly prolong the service life of electrode.The present invention is easy to operate, and fabrication cycle is short, it is easier to mass produce.
Description
Technical field
The invention belongs to technical field of medical instruments, and in particular to a kind of flexible electrocardioelectrode of graphene nano wall and its system
Preparation Method.
Background technology
Heart is in each cardiac cycle, along with biological electricity during pacemaker, atrium, ventricle are in succession excited
Change, these it is bioelectric change be referred to as electrocardios.Because the tissue and body fluid around heart can be conductive, it therefore, it can
Heart is power supply, and human body conducts the summation that Single Cardiac Cell changes to body surface as volume conductor.So, it is different
There is potential difference between sites or in equipotential, the change of these electrical activities is collected into forming curves figure, is exactly the heart
Electrograph.Again by ecg analysis, just it will be seen that the state of human heart.
The acquisition mode of potential difference has significant impact for electrocardiogram accurate response human heart state between at different body surfaces.
It is now commonly used to have much as the electrode for gathering potential difference between different body surfaces, but it is most be all using metal be main
What material was prepared from.And metal material, as electrode, its corrosion resistance, anti-interference and noise resisting ability are poor, micro-
Electric current by when easily produce polarization.
Graphene was separated first from 2004 by British scientist Andre Geim and Konstantin Novoselov
After coming, very excellent physical property has been shown.The resistivity of graphene only has about 10-8Ω m, and electron mobility is high
Up to 15,000cm2V-1s-1.At the same time, carbon is almost without nuclear magnetic moment, and graphene possesses good electromagnetic shielding capability.Cause
This, someone considers to be added to graphene into the top layer of metal electrode as conductive layer, but so has the disadvantage that：Graphene and gold
There is contact resistance between category electrode, the electric conductivity of electrode can not be effectively improved.
Therefore, it is necessary on the basis of existing technology to making further as the scheme of electrocardioelectrode using graphene
Improve.
The content of the invention
In view of this, it is an object of the invention to provide a kind of flexible electrocardioelectrode of graphene nano wall, the electrode collection is soft
Property, good electric conductivity, be difficult polarization, anti-interference and antimierophonic advantage be integrated, preferably can be fitted with body surface；The present invention
Additionally provide the preparation method of above-mentioned electrode.
The technical solution adopted by the present invention is as follows：
1st, the flexible electrocardioelectrode of graphene nano wall, the flexible electrocardioelectrode includes flexible substrate layer and graphene nano
Wall layers；The graphene nano wall layers edge scribbles one layer of conductive silver glue, and the conductive silver glue connects plain conductor.
Further, the plain conductor is silver wire.
Further, the flexible substrate layer and graphene nano wall layers are bonded by binding agent.
Further, the flexible substrate layer is polyethylene terephthalate or using polyimides as the polymerization of base material
Thing.
Further, the polyimides includes polybismaleimide for the polymer of base material or norbornene end-blocking is poly-
Imide resin.
Further, the graphene nano wall layers are prepared by plasma enhanced chemical vapor deposition method.
Further, the plasma enhanced chemical vapor deposition method actual conditions is 30~100Pa of growth pressure, growth
Temperature is 600-750 DEG C, and radio-frequency power is 100W, and gases used is hydrogen and methane is 2 by volume:The gaseous mixture of 3 compositions,
Growth time is 5-30min.
Further, the binding agent is dimethyl silicone polymer, UV uv-curable glues or thermosetting resin.
2nd, the preparation method of the flexible electrocardioelectrode of graphene nano wall, comprises the following steps：
(1) it is thin in sheet metal surface one layer graphene nm wall of deposition by plasma enhanced chemical vapor deposition method
Film；
(2) applied in graphene nano wall film edge and connect plain conductor on one layer of conductive silver glue, conductive silver glue；
(3) the graphene nano wall film containing conductive silver glue and plain conductor for obtaining step (2) is transferred to flexibility
On substrate；
(4) remove sheet metal and produce the flexible electrocardioelectrode of graphene nano wall.
Further, the sheet metal is copper foil or nickel foil.
Further, the step (3) transfer step is applies a layer binder on flexible substrates, by graphene nano
Wall film is overlapped and is fixed thereon with flexible substrate by binding agent.
Further, the step (4) sheet metal that removes is to be removed using the method for etching.
The beneficial effects of the present invention are：The present invention is by plasma enhanced chemical vapor deposition method, first in sheet metal
Graphene nano wall, is then transferred in flexible substrate by upper growth graphene nano wall, finally etches sheet metal to realize stone
The preparation of the flexible electrocardioelectrode of black alkene nm wall.Because graphene nano wall is a kind of two-dimensional graphene piece by perpendicular to substrate
The grapheme material that the brim height that layer is formed is opened, therefore the excellent physical property of graphene is still remained, in addition, graphene
Nm wall is compared with graphene, and also conductive more preferable, the characteristics of contact area is bigger makes it be more suitable for electrocardioelectrode
Directly use, without being used in combination with metal electrode.The flexible electrocardioelectrode of graphene nano wall that the present invention is obtained is due to soft
Property more preferably, fitted with body surface closer, the potential difference of collection is more accurate；Also, the electrode impedance is low, and electric conductivity is excellent,
It is not likely to produce polarization, anti-interference, antinoise.In addition, the corrosion resistance of graphene can also greatly prolong the service life of electrode.This
Invention is easy to operate, and fabrication cycle is short, it is easier to mass produce.
Brief description of the drawings
In order that the purpose of the present invention, technical scheme and beneficial effect are clearer, the present invention provides drawings described below：
Graphene nano wall flexibility electrocardioelectrode described in Fig. 1 embodiments 1；
Graphene nano wall flexibility electrocardioelectrode described in Fig. 2 embodiments 2.
Embodiment
The preferred embodiments of the present invention are described in detail below.The experiment side of unreceipted actual conditions in embodiment
Method, generally according to normal condition or according to the condition proposed by manufacturer.
Embodiment 1
Graphene nano wall flexibility electrocardioelectrode by binding agent without being bonded described in the present embodiment, flexible liner used
Bottom, i.e. dimethyl silicone polymer have the effect of binding agent simultaneously.
The preparation method (flow is shown in Fig. 1) of graphene nano wall flexibility electrocardioelectrode described in the present embodiment, specific steps are such as
Under：
1) copper foil is sequentially placed into acetone, ethanol, deionized water and is cleaned by ultrasonic 10min, dried up with nitrogen standby；
2) by dried copper foil be positioned in plasma reinforced chemical vapor deposition system vacuum cavity by wait from
Daughter enhancing chemical vapour deposition technique carries out graphene nano wall growth；The growth conditions of graphene nano wall film is pressure 30
~100Pa, 600-750 DEG C of growth temperature is gases used for hydrogen and the gaseous mixture (hydrogen volume of methane：Methane volumetric=2:
3), growth time 5-30min, obtains the graphene nano wall film on copper foil；
3) one layer of conductive silver glue, conductive silver glue connection silver wire are applied in graphene nano wall film edge；Then will be whole
Material is placed on warm table, 150 DEG C of heating-up temperature, and the heat time is 30min, to ensure completion of cure；
4) dimethyl silicone polymer is coated uniformly on to the graphene nano wall film table containing conductive silver glue and silver wire
Face, coating thickness 1-2mm；Then whole material is placed on 100 DEG C of baking 1h, then at 120 DEG C of baking 1h, polydimethylsiloxanes
Alkane completion of cure；
5) copper foil, etch period 3h are etched in concentration is 3M ferric nitrates；After copper foil etching is complete, takes out and clean, dry in the air
It is dry, obtain the flexible electrocardioelectrode of graphene nano wall.
Embodiment 2
The preparation method (flow is shown in Fig. 2) of graphene nano wall flexibility electrocardioelectrode described in the present embodiment, specific steps are such as
Under：
1) nickel foil is respectively placed in acetone, ethanol, deionized water and is cleaned by ultrasonic 10min, dried up with nitrogen standby；
2) dried copper foil is positioned in plasma chemical vapor deposition system vacuum cavity and increased by plasma
Extensive chemical vapour deposition process carries out the growth of graphene nano wall film；The growth conditions of graphene nano wall film be pressure 30~
100Pa, 600-750 DEG C of growth temperature is gases used for hydrogen and the gaseous mixture (hydrogen volume of methane：Methane volumetric=2:3),
Growth time 5-30min, obtains the graphene nano wall film on copper foil；
3) one layer of conductive silver glue, conductive silver glue connection silver wire are coated in graphene nano wall film edge；Then will be whole
Individual material is placed on warm table, 150 DEG C of heating-up temperature, and the heat time is 30min, to ensure completion of cure；
4) dimethyl silicone polymer is coated uniformly on to the graphene nano wall film table containing conductive silver glue and silver wire
Face, coating thickness is overlapped within 1mm, then by polyethylene terephthalate covering thereon with graphene nano wall film,
Last 100 DEG C of bakings 1h；
5) copper foil is etched in concentration is 3M ferric nitrates, etch period is 3h, after copper foil etching is complete, takes out and cleans,
Dry, obtain the flexible electrocardioelectrode of graphene nano wall using polyethylene terephthalate as substrate.
It is pointed out that though embodiment enumerates limited, it is as well known to those skilled in the art, it is other such as with polyamides
Imines still can be also not limited to dimethyl silicone polymer for the polymer of base material as flexible substrate, binding agent.
Finally illustrate, preferred embodiment above is merely illustrative of the technical solution of the present invention and unrestricted, although logical
Cross above preferred embodiment the present invention is described in detail, it is to be understood by those skilled in the art that can be
Various changes are made to it in form and in details, without departing from claims of the present invention limited range.
Claims (8)
1. graphene nano wall flexibility electrocardioelectrode, it is characterised in that the flexible electrocardioelectrode includes flexible substrate layer and stone
Black alkene nanometer wall layers；The graphene nano wall layers edge scribbles one layer of conductive silver glue, and the conductive silver glue connects plain conductor；
The graphene nano wall layers are prepared by plasma enhanced chemical vapor deposition method；The plasma enhanced chemical
Vapour deposition process actual conditions is 30 ~ 100Pa of growth pressure, and growth temperature is 600-750 DEG C, and radio-frequency power is 100W, used
Gas is hydrogen and methane is 2 by volume:The gaseous mixture of 3 compositions, growth time is 5-30min.
2. the flexible electrocardioelectrode of graphene nano wall according to claim 1, it is characterised in that the flexible substrate layer and
Graphene nano wall layers are bonded by binding agent.
3. the flexible electrocardioelectrode of graphene nano wall according to claim 1, it is characterised in that the flexible substrate layer is
Polyethylene terephthalate or using polyimides as the polymer of base material.
4. the flexible electrocardioelectrode of graphene nano wall according to claim 3, it is characterised in that the polyimides is base
The polymer of material is polybismaleimide or norbornene capped polyimides resin.
5. the flexible electrocardioelectrode of graphene nano wall according to claim 2, it is characterised in that the binding agent is poly- two
Methylsiloxane, UV uv-curable glues or thermosetting resin.
6. the preparation method of the flexible electrocardioelectrode of any one of the claim 1-5 graphene nano walls, it is characterised in that including
Following steps：
（1）One layer graphene nanometer wall layers are deposited on sheet metal surface by plasma enhanced chemical vapor deposition method；
（2）Applied at graphene nano wall layers edge on one layer of conductive silver glue, conductive silver glue and connect plain conductor；
（3）By step（2）The graphene nano wall layers containing conductive silver glue and plain conductor obtained are transferred to flexible substrate layer
On；
（4）Remove sheet metal and produce the flexible electrocardioelectrode of graphene nano wall.
7. the preparation method of the flexible electrocardioelectrode of graphene nano wall according to claim 6, it is characterised in that the gold
It is copper foil or nickel foil to belong to piece.
8. the preparation method of the flexible electrocardioelectrode of graphene nano wall according to claim 6, it is characterised in that the step
Suddenly（3）The transfer step to apply a layer binder in flexible substrate layer, by graphene nano wall layers by binding agent with it is soft
Property substrate layer is overlapped and is fixed thereon.
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| CN106923822A (en) * | 2017-02-28 | 2017-07-07 | 铂元智能科技(北京)有限公司 | The manufacture method of electrocardioelectrode |
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| CN102920452B (en) * | 2012-11-02 | 2015-02-11 | 上海交通大学 | Graphene-based flexible coronary electrocardio-electrode and preparation method thereof |
| CN103202690B (en) * | 2013-03-14 | 2015-04-15 | 深圳先进技术研究院 | Flexible epicardium electrocardio-electrode chip and preparation method thereof |
| EP2803315B1 (en) * | 2013-05-15 | 2019-10-02 | Polar Electro Oy | Heart activity sensor structure |
| CN104163416B (en) * | 2013-05-20 | 2016-06-29 | 北京化工大学 | A kind of preparation method of graphene nano wall |
| CN104505147B (en) * | 2014-11-13 | 2017-07-04 | 重庆石墨烯研究院有限公司 | The preparation method of graphene nano wall flexible conductive film |
| CN104374486B (en) * | 2014-11-13 | 2018-08-21 | 中国科学院重庆绿色智能技术研究院 | A kind of flexibility temperature sensor and preparation method thereof based on graphene nano wall |
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