CN110313910A - A kind of graphene for brain wave acquisition/polyacrylic acid copolymerized ester/textile flexibility combination electrode material and preparation method thereof - Google Patents
A kind of graphene for brain wave acquisition/polyacrylic acid copolymerized ester/textile flexibility combination electrode material and preparation method thereof Download PDFInfo
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- CN110313910A CN110313910A CN201910534291.5A CN201910534291A CN110313910A CN 110313910 A CN110313910 A CN 110313910A CN 201910534291 A CN201910534291 A CN 201910534291A CN 110313910 A CN110313910 A CN 110313910A
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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
- A61B5/279—Bioelectric electrodes therefor specially adapted for particular uses
- A61B5/291—Bioelectric electrodes therefor specially adapted for particular uses for electroencephalography [EEG]
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F220/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride ester, amide, imide or nitrile thereof
- C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
- C08F220/04—Acids; Metal salts or ammonium salts thereof
- C08F220/06—Acrylic acid; Methacrylic acid; Metal salts or ammonium salts thereof
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M11/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising
- D06M11/73—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with carbon or compounds thereof
- D06M11/74—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with carbon or compounds thereof with carbon or graphite; with carbides; with graphitic acids or their salts
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M15/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
- D06M15/19—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with synthetic macromolecular compounds
- D06M15/21—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- D06M15/263—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds of unsaturated carboxylic acids; Salts or esters thereof
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F220/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride ester, amide, imide or nitrile thereof
- C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
- C08F220/10—Esters
- C08F220/12—Esters of monohydric alcohols or phenols
- C08F220/14—Methyl esters, e.g. methyl (meth)acrylate
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F220/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride ester, amide, imide or nitrile thereof
- C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
- C08F220/10—Esters
- C08F220/12—Esters of monohydric alcohols or phenols
- C08F220/16—Esters of monohydric alcohols or phenols of phenols or of alcohols containing two or more carbon atoms
- C08F220/18—Esters of monohydric alcohols or phenols of phenols or of alcohols containing two or more carbon atoms with acrylic or methacrylic acids
Abstract
The present invention provides a kind of graphene for brain wave acquisition/polyacrylic acid copolymerized ester/textile flexibility combination electrode materials and preparation method thereof, the preparation method comprises the following steps: carrying out in-situ copolymerization after acrylic acid, methyl acrylate, ethyl acrylate are mixed with graphene and reacts, graphene/polyacrylic acid copolymerized ester lotion is made, above-mentioned emulsion and fabric are impregnated again compound to get to the graphene/polyacrylic acid copolymerized ester/textile flexibility combination electrode material for being used for brain wave acquisition.The performance indicators such as conductive characteristic, durability, the stability of combination electrode material of the invention fully meet the requirement of brain wave acquisition, it can wear for a long time and Reusability, it does not need to smear conductive paste, and greatly improve the comfort level of subject, with skin contact and continuous 1 week test result shows the passage with monitoring time, and electrode EEG signals quality collected is stablized, for the resistance value of electrode there is no significant change, electrode using effect is good.
Description
Technical field
The present invention relates to a kind of flexible electrodes and preparation method thereof, and in particular to and a kind of graphene for brain wave acquisition/
Polyacrylic acid copolymerized ester/textile flexibility combination electrode and preparation method thereof.
Background technique
Eeg monitoring is the main side for detecting epileptic attack, psychological non-epileptic attack, migraine, disease sleeping disorders etc.
Method, brain electricity cap are to carry out the essential utensil of eeg monitoring.Common brain electricity cap is mainly wet type electrode brain electricity cap, is used
Before, it needs to smear conductive paste on the electrode or soaks electrode with physiological saline, so that electrode and skin are attached, to
Come into full contact with and carry out again after signal stabilization the acquisition of signal.
The coating needs of conductive paste are completed with the help of medical staff, and taking a long time will be between electrode and scalp
Impedance be adjusted to predetermined value, the usage amount of conductive paste is difficult to control.Injection rate is excessive, and conductive paste and scalp contact area are excessive,
So that the interference containing other excessive electrode points signals in the signal collected, injection rate is very few, hinders between electrode and scalp
Resist excessively high, will be unable to effectively acquire EEG signals.In addition, prolonged acquisition also results in the discomfort of patient skin, when serious
The reaction of allergy redness will be will lead to, the cleaning after monitoring is also very troublesome.
Therefore, it develops one kind and had not only been able to satisfy eeg monitoring requirement, but also easy to carry, comfortable wearing, long-term acquisition letter
Number stabilization, and the reasonable eeg monitoring electrode of manufacturing cost, are the urgent needs of medical industry.
Summary of the invention
It is an object of the invention to provide a kind of graphene for brain wave acquisition/polyacrylic acid copolymerized ester/textile flexibilities
Combination electrode material, to solve the problems such as existing electrode is inconvenient for use, cumbersome.
The object of the present invention is achieved like this:
A kind of graphene for brain wave acquisition/polyacrylic acid copolymerized ester/textile flexibility combination electrode material, makes according to the following steps
It is standby:
Raw material, initiator, water and emulsifier are added in reaction kettle, is reacted through in-situ copolymerization and graphene/polyacrylic acid is made
Copolyesters lotion, then above-mentioned emulsion and fabric impregnated compound to get to being used for the graphene of brain wave acquisition/polyacrylic acid copolymerized
Ester/textile flexibility combination electrode material；The raw material is the mixed of acrylic acid, methyl acrylate, ethyl acrylate and graphene
Close object.
Acrylic acid in the raw material, methyl acrylate, ethyl acrylate volume ratio be 0.2 ~ 1.8: 1: 0.2 ~ 1.8, it is excellent
It is selected as 0.2: 1: 1.8；Graphene content account for acrylic acid, methyl acrylate, ethyl acrylate and graphene gross mass 46 ~
48wt%。
The initiator is potassium peroxydisulfate, and the emulsifier is lauryl sodium sulfate.
The polymerization temperature of the in-situ polymerization is 70 ~ 85 DEG C.
A kind of graphene for brain wave acquisition/polyacrylic acid copolymerized ester/textile flexibility combination electrode material preparation side
Method, comprising the following steps:
(1) by raw material, emulsifier and water be added reaction kettle in, be stirred, the raw material be acrylic acid, methyl acrylate,
The mixture of ethyl acrylate and graphene, the emulsifier are lauryl sodium sulfate, and the water is distilled water；
(2) reaction kettle is warming up to 70 ~ 85 DEG C, initiator is added, the reaction was continued 2.5 ~ 3.5h, the initiator is persulfuric acid
Potassium；
(3) after reaction, reaction kettle is cooled to 50 DEG C, and buffer is added, and adjusts the pH value of solution to 6 ~ 7 to get to through original
Position polymerize graphene/polyacrylic acid copolymerized ester composite emulsion obtained；
(4) fabric substrate is immersed in above-mentioned graphene/polyacrylic acid copolymerized ester composite emulsion, impregnate 2h, then take out into
Drying go to get graphene/polyacrylic acid copolymerized ester/textile flexibility combination electrode material is arrived.The fabric substrate is knitted for fiber
Object, fabric include cotton, woven dacron, polyamide cloth, non-woven fabrics.
Gained graphene/polyacrylic acid copolymerized ester/textile flexibility combination electrode material is cut into 1.5cm × 1.5cm's
Square is pasted on the patch electrode of eeg monitoring to get to experiment brain electrical monitoring electrode, is directly used in brain electricity prison
It surveys, electrode and eeg monitoring scene photo are as shown in Fig. 1.This electrode using when do not need to coat on it conductive paste or
Impregnate physiological saline.
In the step (1), acrylic acid, methyl acrylate, ethyl acrylate volume ratio be 0.2 ~ 1.8: 1: 0.2 ~
1.8, preferably 0.2: 1: 1.8；Graphene content accounts for 46 ~ 48 wt% of total mass of raw material, preferably 46.5wt%；The water
Dosage is 40 ~ 50 mL, preferably 45 mL.
In the step (2), reaction temperature is 80 DEG C；The initiator amount be monomer (acrylic acid, methyl acrylate and
Ethyl acrylate) total amount 1 ~ 2wt%, preferably 1.5 wt%；Reaction time is 3h.
In the step (4), drying temperature is 50 DEG C, it is dry after combination electrode material thickness control 0.10 ~
0.15mm, preferably 0.12mm.
The present invention prepares graphene/polyacrylic acid copolymerized ester lotion using situ aggregation method, i.e., first by graphene in propylene
It is evenly dispersed in esters of gallic acid monomer, then cause polymerization under the action of initiator potassium persulfate and forms multiple emulsion, graphene
It is evenly dispersed in polyacrylic acid copolymerized ester lotion (multiple emulsion).Multiple emulsion forms composite material in conjunction with fabric, can
To guarantee the mechanical property of material.After multiple emulsion and fabric dipping, drying, the polyacrylic acid copolymerized ester energy containing graphene
Enough very equably upper and lower surfaces of covering fabric, and be filled between the gap of fabric fibre, form polyacrylic acid copolymerized ester
With the three-dimensional network interpenetrating of fabric, interlocking structure, the firm connection of polyacrylic acid copolymerized ester and flexible fabric ensure that.Polypropylene
Sour copolyesters is bonded together the graphene of sufficient amount, and graphene forms conductive path in polyacrylic acid copolymerized ester, and
It is firmly fettered in the material by polyacrylic acid copolymerized ester, will not fall off or pollute skin in use process, and ensure that brain electricity
The stability of monitoring signals.
The performance indicators such as conductive characteristic, durability, the stability of combination electrode material of the invention fully meet brain electricity and adopt
The requirement of collection, can wear and Reusability for a long time, not need to smear conductive paste, and greatly improve the comfortable of subject
Degree, with skin contact and continuous 1 week test result shows the passage with monitoring time, electrode EEG signals matter collected
Amount is stablized, and for the resistance value of electrode there is no significant change, electrode using effect is good.
Detailed description of the invention
Fig. 1 is that experiment electroencephalogram combination electrode and brain electricity cap acquire equipment drawing.
Fig. 2 is the outside drawing of 1 gained combination electrode material of embodiment.
Fig. 3 is the outside drawing of 2 gained combination electrode material of embodiment.
Fig. 4 is the outside drawing of 3 gained combination electrode material of embodiment.
Fig. 5 is the DSC heating spectrogram of 1 ~ 3 gained combination electrode material of embodiment.
Fig. 6-7 is using combination electrode made from embodiment 3 (Graphene) and silver/silver chloride electrode (Ag/AgCl) point
Forehead EEG signal waveform comparison diagram when the blink not acquired.
Specific embodiment
Below with reference to embodiment, the present invention is further elaborated, the process being not described in detail in the following embodiments and
Method is conventional method well known in the art, and raw materials used or reagent is unless otherwise stated commercially available product in embodiment, can be led to
Commercial channel is crossed to buy.
Raw graphite alkene specification is XF180, is purchased in Jiangsu Xian Feng Nono-material Science & Technology Ltd.；Acrylic acid is chemistry
Pure, methyl acrylate, ethyl acrylate and lauryl sodium sulfate are that analysis is pure, are purchased in Tianjin Ke Miou chemical reagent
Co., Ltd；Potassium peroxydisulfate is that analysis is pure, is purchased in Tianjin good fortune morning chemical reagent factory；Dimethicone is that analysis is pure, is purchased
In Tianjin Bei Lian fine chemicals development corporation, Ltd..
Embodiment 1
By graphene slurry 52.5g (containing graphene 2.6g), acrylic acid 1.8mL(0.026mol), methyl acrylate 1mL(0.011
Mol), ethyl acrylate 0.2mL(0.002mol) and lauryl sodium sulfate 0.52g and distilled water 45mL addition reaction kettle
In, it is stirred, is warming up to 80 DEG C, potassium peroxydisulfate 0.033g is added dropwise, reaction 3h is cooled to 50 DEG C, adds after reaction
Enter buffer, the pH value for adjusting solution is compound through graphene made from in-situ polymerization/polyacrylic acid copolymerized ester to get arriving to 6 ~ 7
Lotion.
Take appropriate graphene/polyacrylic acid copolymerized ester composite emulsion in 50 mL beakers, by uniform non-woven fabrics (4.0cm
× 5.0cm) immerse lotion in impregnate 2 h, then take out in the baking oven for be placed in 50 DEG C and be dried, just obtain graphene/poly- third
Olefin(e) acid copolyesters/non-woven fabrics flexible composite electrode material, the appearance of material are as shown in Figure 2.
Graphene obtained/polyacrylic acid copolymerized ester/non-woven fabrics flexible compound electrode has following property: 1) vitrifying turns
Temperature (T g) it is 31.4 DEG C；2) tensile strength 2.2MPa, fracture strength 1.2MPa；3) resistance of combination electrode is 53 Ω；4)
Graphene/polyacrylic acid copolymerized ester/non-woven fabric compounded electrode and conventional commercial electrode (silver/silver chloride electrode) carry out continuous respectively
It wears within 7 days, carry out EEG signals monitoring experiment every three days, as the result is shown: the EEG signals amplitude variation that combination electrode measures
It is compared with commercial electrode, brain signal amplitude does not have apparent difference, substantially close to the performance of commercial electrode.
Embodiment 2
By graphene slurry 50.7g (containing graphene 2.5g), acrylic acid 1mL(0.015mol), methyl acrylate 1mL(0.011
Mol), ethyl acrylate 1mL(0.009 mol) and lauryl sodium sulfate 0.51g and distilled water 45mL be added in reaction kettle,
It is stirred, is warming up to 80 DEG C, potassium peroxydisulfate 0.033g is added dropwise, react 3h, after reaction, be cooled to 50 DEG C, be added
Buffer adjusts the pH value of solution to 6 ~ 7 to get to through graphene made from in-situ polymerization/polyacrylic acid copolymerized ester Composite Milk
Liquid.
Take appropriate graphene/polyacrylic acid copolymerized ester composite emulsion in 50 mL beakers, by uniform non-woven fabrics (4.0cm
× 5.0cm) immerse lotion in impregnate 2 h, then take out, be placed in 50 DEG C of baking oven and be dried, just obtain graphene/poly- third
Olefin(e) acid copolyesters/non-woven fabrics flexible composite electrode material, material appearance are as shown in Figure 3.
Graphene obtained/polyacrylic acid copolymerized ester/non-woven fabrics flexible compound electrode has following property: 1) vitrifying turns
Temperature (T g) it is 38.3 DEG C；2) tensile strength 2.1MPa, fracture strength 1.1MPa；3) resistance of combination electrode is 47 Ω；4)
Graphene/polyacrylic acid copolymerized ester combination electrode and conventional commercial electrode (silver/silver chloride electrode) carry out respectively continuous 7 days, it is every
Every progress EEG signals monitoring experiment in two days, as the result is shown: the EEG signals amplitude variation that combination electrode measures and commercial electrode
It compares, brain signal amplitude does not have apparent difference, substantially close to the performance characteristic of commercial electrode.
Embodiment 3
By graphene slurry 48.9g (containing graphene 2.4g), acrylic acid 0.2mL(0.003mol), methyl acrylate 1mL(0.011
Mol), ethyl acrylate 1.8mL(0.017 mol) and lauryl sodium sulfate 0.52g and distilled water 45mL addition reaction kettle
In, it being stirred, is warming up to 80 DEG C, potassium peroxydisulfate 0.030g is added dropwise, reaction 3h is cooled to 50 DEG C after reaction,
Buffer is added, the pH value for adjusting solution is answered to 6 ~ 7 to get to through graphene made from in-situ polymerization/polyacrylic acid copolymerized ester
Close lotion.
Take appropriate graphene/polyacrylic acid copolymerized ester composite emulsion in 50 mL beakers, by uniform non-woven fabrics (4.0cm
× 5.0cm) immerse lotion in impregnate 2 h, then take out in the baking oven for be placed in 50 DEG C and be dried, just obtain graphene/poly- third
Olefin(e) acid copolyesters/non-woven fabrics flexible composite electrode material, material appearance are as shown in Figure 4.
Graphene obtained/polyacrylic acid copolymerized ester/non-woven fabric compounded electrode has following property: 1) glass transition temperature
Degree (T g) it is 17.4 DEG C；2) tensile strength 2.1MPa, fracture strength 1.1MPa；3) resistance of combination electrode is 49 Ω；4) graphite
Alkene/polyacrylic acid copolymerized ester combination electrode and conventional commercial electrode (silver/silver chloride electrode) carry out continuous 7 days, every two respectively
It carries out EEG signals monitoring experiment, as the result is shown: the EEG signals amplitude variation that combination electrode measures is carried out with commercial electrode
No apparent difference is compared, the performance of commercial electrode is substantially conformed to.
1 ~ 3 products obtained therefrom of embodiment is performed the following performance tests:
Glass transition temperature (T g) characterization: it uses DSC8000 type differential scanning calorimeter (Perkin-Elmer company, the U.S.)
It is tested.It weighs 3~5 mg samples and records actual mass, and with tablet machine seal sample.In high purity N2Under atmosphere, survey
The DSC heating curve for determining combination electrode material prepared by embodiment 1, embodiment 2 and embodiment 3, is as a result shown in Fig. 5.
Fig. 5 is the DSC heating spectrogram of combination electrode, and the heating curve of sample shows apparent glass transition temperature
(T g).As shown, embodiment 1, embodiment 2 and embodiment 3 glass transition temperature (T g) it is 31.4 DEG C, 38.3 respectively
℃,17.4℃.Wherein embodiment 3 glass transition temperature (T g) room temperature (25 DEG C) are significantly lower than, table when using at room temperature
Reveal preferable flexibility, subject's comfort level is substantially increased compared with the rigid graphene film of compacting.
Characterization of Tensile: according to GB/T 1040-2006, combination electrode dumbbell shape batten is prepared, with electronics universal material
Testing machine carries out extension test to the batten of preparation, and each embodiment resulting materials will carry out 3 tests, and test value is flat for it
Mean value.
Table 1: sample mechanical property list
Electric conductivity characterization: selection VC890C+ type digital multimeter (win high Electronic Science and Technology Co., Ltd. for Shenzhen) simultaneously connects
To measurement resistance mode.Range is selected as 0 ~ 200 Ω, carries out continuous one week resistance test to combination electrode, daily test 5 times
And its average value is taken, gained resistance value is shown in Table 2.It is wanted the results show that the resistance of combination electrode is all satisfied for eeg monitoring
It asks and its resistance is relatively stable at room temperature.
The resistance variations of each combination electrode in table 2: one weeks
EEG signals monitoring: in order to study sensitivity of the combination electrode for EEG signals monitoring, with traditional silver/silver chlorate electricity
Extremely collected signal is compared.Combination electrode and conventional silver/silver chloride electrode are consolidated using flexible brain electricity cap
It is scheduled at 24 years old healthy male subjects forehead, EEG signals system is connected to by the cable of equal length, subject, which does, to blink
Eye movement is made and measures signal.It is substantially carried out the signal contrast and measure multiple that combination electrode is measured with conventional silver/silver chloride electrode
The stability of composite electrode.
It is using combination electrode made from embodiment 3 (Graphene) and silver/silver chloride electrode (Ag/AgCl) shown in Fig. 6
Forehead EEG signal waveform comparison diagram when the blink acquired respectively.As seen from the figure, two bars monitoring curves almost coincide, and show
The sensitivity that combination electrode monitors EEG signals is close with traditional silver/silver chloride electrode, and the two does not observe apparent difference.
Thus illustrate, combination electrode of the invention has a possibility that substitution commercialization electrode.
As the wearable electrode that can be used to monitor for a long time, need within a certain period of time to carry out EEG signals lasting
Acquisition.Continuous 7 days wearings are set and acquired the experiment of an EEG signals every 2 days, to observe collected EEG signals
Variation.The EEG signals when blink measured at forehead when Fig. 7 shows the 1st day (figure a), the 4th day (figure b) and the 7th day (scheming c),
And compared with Ag/ACl electrode monitoring signals.
By experimental result as can be seen that over time, the collected EEG signals amplitude of institute is decayed without obvious,
Also there is not baseline drift in waveform.Caused by the minor deviations of amplitude may be different from skin contact impedance in figure.This reality
Test the result shows that, Graphene electrodes collected EEG signals in 7d are stablized, and overcome most of electrodes and detect in long-time
The problems such as existing signal decays and pollutes skin in the process.
Claims (10)
1. a kind of graphene for brain wave acquisition/polyacrylic acid copolymerized ester/textile flexibility combination electrode material, feature exist
In preparing according to the following steps: it is anti-to carry out in-situ copolymerization after acrylic acid, methyl acrylate, ethyl acrylate are mixed with graphene
It answers, is made graphene/polyacrylic acid copolymerized ester lotion, then above-mentioned emulsion and fabric impregnated compound to get adopting to being used for brain electricity
The graphene of collection/polyacrylic acid copolymerized ester/textile flexibility combination electrode material.
2. the graphene according to claim 1 for brain wave acquisition/polyacrylic acid copolymerized ester/textile flexibility combination electrode
Material, which is characterized in that the acrylic acid, methyl acrylate, ethyl acrylate volume ratio be 0.2 ~ 1.8: 1: 0.2 ~ 1.8,
Graphene content accounts for 46 ~ 48wt% of acrylic acid, methyl acrylate, ethyl acrylate and graphene gross mass.
3. the graphene according to claim 1 for brain wave acquisition/polyacrylic acid copolymerized ester/textile flexibility combination electrode
Material, which is characterized in that in-situ copolymerization reaction temperature is 70 ~ 85 DEG C.
4. the graphene according to claim 1 for brain wave acquisition/polyacrylic acid copolymerized ester/textile flexibility combination electrode
Material, which is characterized in that the initiator of in-situ copolymerization reaction is potassium peroxydisulfate, and emulsifier is lauryl sodium sulfate.
5. a kind of graphene for brain wave acquisition/polyacrylic acid copolymerized ester/textile flexibility combination electrode material preparation method,
Characterized by comprising the following steps:
(1) by raw material, emulsifier and water be added reaction kettle in, be stirred, the raw material be acrylic acid, methyl acrylate,
The mixture of ethyl acrylate and graphene；
(2) reaction kettle is warming up to 70 ~ 85 DEG C, initiator is added, react 2.5 ~ 3.5h；
(3) after reaction, reaction kettle is cooled to 50 DEG C, buffer is added, adjust the pH value of solution to 6 ~ 7 to get to stone
Black alkene/polyacrylic acid copolymerized ester composite emulsion；
(4) above-mentioned graphene/polyacrylic acid copolymerized ester composite emulsion and fabric substrate dipping is compound, it dries to get graphite is arrived
Alkene/polyacrylic acid copolymerized ester/textile flexibility combination electrode material.
6. preparation method according to claim 5, which is characterized in that in the step (1), the acrylic acid, acrylic acid
Methyl esters, ethyl acrylate volume ratio be 0.2 ~ 1.8: 1: 0.2 ~ 1.8, graphene content accounts for acrylic acid, methyl acrylate, propylene
46 ~ 48wt% of acetoacetic ester and graphene gross mass.
7. preparation method according to claim 5, which is characterized in that in the step (1), the emulsifier is dodecane
Base sodium sulphate, the water are distilled water.
8. preparation method according to claim 5, which is characterized in that in the step (2), the initiator is persulfuric acid
Potassium, the initiator amount are 1 ~ 2wt%.
9. preparation method according to claim 5, which is characterized in that in the step (4), the fabric substrate is nonwoven
Cloth, cotton, woven dacron or polyamide cloth.
10. preparation method according to claim 5, which is characterized in that in the step (4), drying temperature is 50 DEG C, is done
It is dry after gained combination electrode material with a thickness of 0.10 ~ 0.15mm.
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| US20090112277A1 (en) * | 2007-10-30 | 2009-04-30 | Neuropace, Inc. | Systems, methods and devices for a skull/brain interface |
| CN102603958A (en) * | 2012-01-13 | 2012-07-25 | 陕西科技大学 | Preparation method of acrylic resin/graphene oxide nanometer composite leather finishing agent |
| CN103554346A (en) * | 2013-10-14 | 2014-02-05 | 陕西科技大学 | Method for preparing pigment printing binder from oxidized graphene modified polyacrylate |
| CN105088749A (en) * | 2015-08-28 | 2015-11-25 | 东华大学 | Graphene/cotton cloth flexible conducting fabric and preparing method of graphene/cotton cloth flexible conducting fabric |
| CN105615880A (en) * | 2015-11-27 | 2016-06-01 | 电子科技大学 | Flexible graphene electroencephalogram capacitive electrode capable of inhibiting motion artifacts |
| CN107198519A (en) * | 2017-06-30 | 2017-09-26 | 华南理工大学 | A kind of Novel sweat-absorbing textile electrode |
| CN109273671A (en) * | 2018-09-12 | 2019-01-25 | 中南民族大学 | Polyacrylate macromolecule combination electrode material and preparation method thereof |
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| CN113261978A (en) * | 2021-06-16 | 2021-08-17 | 天津理工大学 | Self-supporting graphene wall electrode and preparation method and application thereof |
| CN113261978B (en) * | 2021-06-16 | 2023-04-14 | 天津理工大学 | Self-supporting graphene wall electrode and preparation method and application thereof |
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