CN110455176A - The preparation method of flexible strain transducer - Google Patents
The preparation method of flexible strain transducer Download PDFInfo
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- CN110455176A CN110455176A CN201910653792.5A CN201910653792A CN110455176A CN 110455176 A CN110455176 A CN 110455176A CN 201910653792 A CN201910653792 A CN 201910653792A CN 110455176 A CN110455176 A CN 110455176A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
- G01B7/16—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring the deformation in a solid, e.g. by resistance strain gauge
- G01B7/18—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring the deformation in a solid, e.g. by resistance strain gauge using change in resistance
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- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
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Abstract
The present invention provides a kind of preparation methods of flexible strain transducer, mainly comprising the steps that will immerse in graphene oxide solution by pretreated bright and beautiful spandex fabric, after standing and drying, immerse hydrazine hydrate mixed liquor, it is heated and is restored using immersion method, it is cleaned with deionized water, after drying, immerse carbon nano-tube solution, after standing and drying, it is transferred to prefabricated mould, synchronous coating conductive silver paste and extraction wire, the encapsulation of dimethyl silicone polymer solution is reused, demoulding obtains flexible strain transducer after being put into curing oven.The method of the present invention is simple, low in cost, while composite material can be cut, and thus, it is possible to prepare the high stability flexibility strain transducer of different shape size, can flexibly, easily be attached at the surface of various patterns, can detect the human body signals such as digital flexion.
Description
Technical field
The present invention relates to a kind of preparation methods of flexible strain transducer, belong to sensor field.
Background technique
With the development of economy and society, pollution problem is got worse, sub-health population increases, aging of population aggravation, people
It is higher and higher to the degree of concern of own health, it is desirable that the cry of real-time monitoring physiological signal is more more and more intense.Traditional base
Low in the strain transducer detection sensitivity of semiconductor or metal material, flexibility is poor, in this context, flexible strain transducer
Come into being, because its high sensitivity, with human body is easy to attach, flexibility is good the features such as, it is huge in medical health field application prospect.
Graphene be one kind by carbon atom with sp2Hybridized orbit forms the carbon nanomaterial that hexangle type is in honeycomb lattice, is
The first two-dimensional material truly that the mankind are had found.Graphene has good chemical stability and brilliant machinery
The advantages that performance, graphene-based flexible sensor just causes the extensive concern of whole world researcher between the short several years.And carbon is received
Mitron is as monodimension nanometer material, and light-weight, draw ratio is high, and hexagonal structure connection is perfect, equally has many abnormal power
, electricity and chemical property.
Currently, have research that directly the electronic components such as sensor are implanted into fabric, but this does not improve sensor
Flexibility.Unlike this, the fabric strain sensors for depositing graphene are to integrate flexible sensor and fabric height, with common
Clothes are that carrier prepares flexible strain transducer, and human body comfort is good, can monitor the human motions such as digital flexion.But greatly
Most graphene fabric sensors only deposit graphene in fabric surface, and degree of integration is bad, and preparation process is not easy to control, at
This is higher, and the sensitivity of strain transducer is low, and stability is poor.Prepare the graphene fabric sensor of inexpensive high stability
Significant challenge is still remained, needs to continuously improve technology.
In view of this, the preparation method it is necessory to propose a kind of flexible strain transducer, to solve the above problems.
Summary of the invention
The purpose of the present invention is to provide a kind of preparation method of flexible strain transducer, the preparation method simple and efficient,
Process control, the cost of flexible strain transducer is low, light weight and stability are high.
To achieve the above object, the present invention provides a kind of preparation methods of flexible strain transducer, mainly include following
Step:
Step S1, it will be immersed in graphene oxide solution by pretreated bright and beautiful spandex fabric, and stand 5-10min, take out
Fabric obtains graphene oxide/Fabric composites after drying；
Step S2, graphene oxide/Fabric composites is immersed into hydrazine hydrate mixed liquor, is heated and is restored using immersion method,
It is cleaned with deionized water, graphene/Fabric composites is obtained after drying；
Step S3, graphene/Fabric composites is immersed into carbon nano-tube solution, stands 5-10min, take out fabric, dried
Graphene/carbon nano-tube/Fabric composites is obtained after dry；
Step S4, graphene/carbon nano-tube/Fabric composites is transferred to prefabricated mould, synchronous coating conductive silver paste
And extraction wire, the encapsulation of dimethyl silicone polymer solution is reused, demoulding after 60 DEG C of curing oven 12h is put into and obtains flexibility and answer
Become sensor.
Optionally, the pretreated mode in step S1 are as follows: immersed after cleaning bright and beautiful spandex fabric with deionized water anhydrous
In ethyl alcohol, it is placed in water bath sonicator instrument and carries out ultrasonic treatment 20min-30min, supersonic frequency 40KHz.
Optionally, brocade spandex fabric described in step S1 is by 87% Fypro and 13% polyurethane fiber group
At.
Optionally, the concentration of graphene oxide solution described in step S1 is 0.5-2mg/mL.
Optionally, deionized water and hydrazine hydrate (N in the hydrazine hydrate mixed liquor in step S22H4·H2O, 50%) concentration
Proportion is 10:1.
Optionally, when in step S2 using immersion method heating reduction, heating temperature is 90-95 DEG C, heating time 1-2h.
Optionally, the mass percent of carbon nano-tube solution is 0.1-1wt% in step S3.
Optionally, dimethyl silicone polymer solution is mixed by dimethyl silicone polymer and curing agent in step S4, and
The volume ratio of dimethyl silicone polymer and curing agent is 10:1.
Optionally, step S1, the drying mode in S2 and S3 is to be put into 70 DEG C of convection ovens dry 30min.
Optionally, the flexible strain transducer is integrally in flat, and the length of cross section is 20mm, and width is
10mm, longitudinal section with a thickness of 1-2mm.
The beneficial effects of the present invention are: the present invention is compound using the bright and beautiful spandex fabric and graphene, carbon nanotube of low cost,
Highly sensitive graphene/carbon nano-tube/Fabric composites is obtained, which wants equipment without special
It asks, water-fastness, stability height and good permeability.Meanwhile the composite material can be cut, and different shape ruler thus can be prepared
The very little flexible strain transducer of high sensitivity, can flexibly, easily be attached at the surface of various patterns, light weight and have relatively strong
Environmental suitability.
Detailed description of the invention
Fig. 1 is the preparation method flow chart of flexible strain transducer of the invention.
Fig. 2 is the structural schematic diagram for the flexible strain transducer that flow chart prepares as shown in Figure 1.
Fig. 3 is test circuit diagram when flexibility strain transducer shown in Fig. 2 is bent signal detection for human finger.
Fig. 4 is voltage change figure when test circuit shown in Fig. 3 is used to detect human finger bending signal.
The variation diagram of relative resistance when Fig. 5 is human finger Cyclic flexion in Fig. 4.
Specific embodiment
To make the objectives, technical solutions, and advantages of the present invention clearer, right in the following with reference to the drawings and specific embodiments
The present invention is described in detail.
As shown in Figure 1, being mainly comprised the steps that the present invention provides a kind of preparation method of flexible strain transducer
Step S1, it will be immersed in graphene oxide solution by pretreated bright and beautiful spandex fabric, and stand 5-10min, take out
Fabric obtains graphene oxide/Fabric composites after drying；
Step S2, graphene oxide/Fabric composites is immersed into hydrazine hydrate mixed liquor, is heated and is restored using immersion method,
It is cleaned with deionized water, graphene/Fabric composites is obtained after drying；
Step S3, graphene/Fabric composites is immersed into carbon nano-tube solution, stands 5-10min, take out fabric, dried
Graphene/carbon nano-tube/Fabric composites is obtained after dry；
Step S4, graphene/carbon nano-tube/Fabric composites is transferred to prefabricated mould, synchronous coating conductive silver paste
And extraction wire, the encapsulation of dimethyl silicone polymer solution is reused, demoulding after 60 DEG C of curing oven 12h is put into and obtains flexibility and answer
Become sensor.
It elaborates below to step S1-S4.
Pretreated mode in step S1 are as follows: it is immersed in dehydrated alcohol after cleaning bright and beautiful spandex fabric with deionized water,
It is placed in water bath sonicator instrument and carries out ultrasonic treatment 20min-30min, supersonic frequency 40KHz.
Brocade spandex fabric described in step S1 is made of 87% Fypro and 13% polyurethane fiber.
The concentration of graphene oxide solution described in step S1 is 0.5-2mg/mL.
Deionized water and hydrazine hydrate (N in hydrazine hydrate mixed liquor in step S22H4·H2O, 50%) concentration proportioning is
10:1.Example: 50mL deionized water is measured, 5mL hydrazine hydrate is added, is placed in water bath sonicator instrument and carries out ultrasonic treatment 5-10min
Until evenly dispersed, supersonic frequency 40KHz can prepare hydrazine hydrate mixed liquor.
When in step S2 using immersion method heating reduction, heating temperature is 90-95 DEG C, heating time 1-2h.
Carbon nanotube described in step S3 is multi-walled carbon nanotube, and the mass percent of the carbon nano-tube solution is 0.1-
1wt%.
The concrete configuration step of dimethyl silicone polymer solution in step S4 are as follows:
(1) it measures dimethyl silicone polymer respectively and curing agent is mixed, wherein dimethyl silicone polymer and curing agent
Volume ratio be 10:1；
(2) mixed solution is placed in vacuum drying oven, vacuum defoams 5-15min until solution bubble-free, obtains
Dimethyl silicone polymer solution.
Step S1, the drying mode in S2 and S3 is to be put into 70 DEG C of convection ovens dry 30min.
Specifically, following description part will by taking 3 kinds of embodiments as an example, to the preparation method of flexible strain transducer into
Row is described in detail.
Embodiment 1, the preparation method of flexible strain transducer, includes the following steps:
Step S1, it will immerse in graphene oxide solution (0.5mg/mL), stand by pretreated bright and beautiful spandex fabric
10min takes out fabric, is put into 70 DEG C of convection ovens dry 30min, repeats the step 3 time, keep graphene oxide solution abundant
It is deposited on bright and beautiful spandex fabric surface, obtains graphene oxide/Fabric composites；
Step S2, graphene oxide/Fabric composites is immersed into hydrazine hydrate mixed liquor, heated at 90 DEG C 2 hours with
Hydrothermal reduction is carried out, is cleaned after reduction with deionized water, dry 30min is put into 70 DEG C of convection ovens, obtains graphene/fabric
Composite material；
Step S3, graphene/Fabric composites is immersed and stands 10min in carbon nano-tube solution (1wt%), be put into 70
Dry 30min, makes carbon nanotube be deposited on fabric surface, obtains graphene/carbon nano-tube/fabric composite wood in DEG C convection oven
Material；
Step S4, graphene/carbon nano-tube/Fabric composites is transferred to prefabricated mould, synchronous coating conductive silver paste
And extraction wire, the encapsulation of dimethyl silicone polymer solution is reused, demoulding after 60 DEG C of curing oven 12h is put into and obtains flexibility and answer
Become sensor.
Embodiment 2, the preparation method of flexible strain transducer, includes the following steps:
Step S1, it will immerse in graphene oxide solution (1mg/mL), stand by pretreated bright and beautiful spandex fabric
10min takes out fabric, is put into 70 DEG C of convection ovens dry 30min, repeats the step 3 time, keep graphene oxide solution abundant
It is deposited on bright and beautiful spandex fabric surface, obtains graphene oxide/Fabric composites；
Step S2, graphene oxide/Fabric composites is immersed into hydrazine hydrate mixed liquor, heated at 90 DEG C 2 hours with
Hydrothermal reduction is carried out, is cleaned after reduction with deionized water, dry 30min is put into 70 DEG C of convection ovens, obtains graphene/fabric
Composite material；
Step S3, graphene/Fabric composites is immersed and stands 10min in carbon nano-tube solution (1wt%), be put into 70
Dry 30min, makes carbon nanotube be deposited on fabric surface, obtains graphene/carbon nano-tube/fabric composite wood in DEG C convection oven
Material；
Step S4, graphene/carbon nano-tube/Fabric composites is transferred to prefabricated mould, synchronous coating conductive silver paste
And extraction wire, the encapsulation of dimethyl silicone polymer solution is reused, demoulding after 60 DEG C of curing oven 12h is put into and obtains flexibility and answer
Become sensor.
Embodiment 3, the preparation method of flexible strain transducer, includes the following steps:
Step S1, it will immerse in graphene oxide solution (2mg/mL), stand by pretreated bright and beautiful spandex fabric
10min takes out fabric, is put into 70 DEG C of convection ovens dry 30min, repeats the step 3 time, keep graphene oxide solution abundant
It is deposited on bright and beautiful spandex fabric surface, obtains graphene oxide/Fabric composites；
Step S2, graphene oxide/Fabric composites is immersed into hydrazine hydrate mixed liquor, heated at 90 DEG C 2 hours with
Hydrothermal reduction is carried out, is cleaned after reduction with deionized water, dry 30min is put into 70 DEG C of convection ovens, obtains graphene/fabric
Composite material；
Step S3, graphene/Fabric composites is immersed and stands 10min in carbon nano-tube solution (1wt%), be put into 70
Dry 30min, makes carbon nanotube be deposited on fabric surface, obtains graphene/carbon nano-tube/fabric composite wood in DEG C convection oven
Material；
Step S4, graphene/carbon nano-tube/Fabric composites is transferred to prefabricated mould, synchronous coating conductive silver paste
And extraction wire, the encapsulation of dimethyl silicone polymer solution is reused, demoulding after 60 DEG C of curing oven 12h is put into and obtains flexibility and answer
Become sensor.
As shown in Fig. 2, for the structural schematic diagram of the flexible strain transducer prepared.The flexibility strain transducer is whole
Body is in flat, and the length of cross section is 20mm, width 10mm, longitudinal section with a thickness of 1-2mm, the flexible strain passes
Sensor includes strain inductive layer, electrode and flexible package layer.
The strain inductive layer is electrically connected with the electrode, and the strain inductive layer is knitting for graphene/carbon nano-tube
Object.
The electrode includes conductive silver paste and conducting wire, and described conducting wire one end is bonded in the strain by the conductive silver paste
On inductive layer, the other end be directed to the outside of the flexible package layer.
The flexible package layer includes upper layer PDMS substrate and lower layer's PDMS substrate, and covers the strain inductive layer and institute
State electrode.Specifically, the flexible package layer is mixed by dimethyl silicone polymer and curing agent, and dimethyl silicone polymer
Volume ratio with curing agent is 10:1.
It will be illustrated by taking human finger curved detection as an example below.
As shown in figure 3, test circuit is by constant pressure source Vs(10V), protective resistance R (100k Ω), strain transducer resistance RGWith
Oscillograph composition, strain transducer resistance RGThe voltage V at both ends are as follows:
Wherein, VsFor the voltage of constant pressure source.Voltage V can reflect out human finger bending signal.
Flexible strain transducer obtained is attached to human finger joint, is tested using the test circuit of Fig. 3.
As shown in figure 4, the human finger to measure is bent the voltage change figure of signal.
As shown in figure 5, be human finger Cyclic flexion when relative resistance change curve.
As can be seen from Figure 4 and Figure 5: flexible strain transducer of the invention sensitivity and in terms of property
It can all improve a lot.
In conclusion the present invention is compound using the bright and beautiful spandex fabric and graphene, carbon nanotube of low cost, obtain highly sensitive
Graphene/carbon nano-tube/Fabric composites of degree, the technical solution simple possible is water-fastness to equipment without particular/special requirement,
Stability height and good permeability.Meanwhile the composite material can be cut, the high sensitivity that thus can prepare different shape size is soft
Property strain transducer, flexibly, be easily attached at the surface of various patterns, light weight and there is stronger environmental suitability.
The above examples are only used to illustrate the technical scheme of the present invention and are not limiting, although referring to preferred embodiment to this hair
It is bright to be described in detail, those skilled in the art should understand that, it can modify to technical solution of the present invention
Or equivalent replacement, without departing from the spirit and scope of the technical solution of the present invention.
Claims (10)
1. a kind of preparation method of flexibility strain transducer, which is characterized in that mainly comprise the steps that
Step S1, it will be immersed in graphene oxide solution by pretreated bright and beautiful spandex fabric, and stand 5-10min, take out fabric,
Graphene oxide/Fabric composites is obtained after drying；
Step S2, graphene oxide/Fabric composites is immersed into hydrazine hydrate mixed liquor, is heated and restored using immersion method, is spent
Ionized water cleaning, obtains graphene/Fabric composites after drying；
Step S3, graphene/Fabric composites is immersed into carbon nano-tube solution, stands 5-10min, fabric is taken out, after drying
Obtain graphene/carbon nano-tube/Fabric composites；
Step S4, graphene/carbon nano-tube/Fabric composites is transferred to prefabricated mould, synchronous coating conductive silver paste simultaneously draws
Conducting wire out reuses the encapsulation of dimethyl silicone polymer solution, and demoulding obtains flexible strain biography after being put into 60 DEG C of curing oven 12h
Sensor.
2. the preparation method of flexibility strain transducer according to claim 1, it is characterised in that: the pretreatment in step S1
Mode are as follows: after bright and beautiful spandex fabric is cleaned with deionized water immerse dehydrated alcohol in, be placed in water bath sonicator instrument carry out ultrasound
Handle 20min-30min, supersonic frequency 40KHz.
3. the preparation method of flexibility strain transducer according to claim 1, it is characterised in that: brocade ammonia described in step S1
Synthetic fibre fabric is made of 87% Fypro and 13% polyurethane fiber.
4. the preparation method of flexibility strain transducer according to claim 1, it is characterised in that: aoxidized described in step S1
The concentration of graphene solution is 0.5-2mg/mL.
5. the preparation method of flexibility strain transducer according to claim 1, it is characterised in that: the hydrazine hydrate in step S2
Deionized water and hydrazine hydrate (N in mixed liquor2H4·H2O, 50%) concentration proportioning is 10:1.
6. the preparation method of flexibility strain transducer according to claim 1, it is characterised in that: utilize water-bath in step S2
When method heating reduction, heating temperature is 90-95 DEG C, heating time 1-2h.
7. the preparation method of flexibility strain transducer according to claim 1, it is characterised in that: carbon nanotube in step S3
The mass percent of solution is 0.1-1wt%.
8. the preparation method of flexibility strain transducer according to claim 1, it is characterised in that: poly dimethyl in step S4
Siloxane solution is mixed by dimethyl silicone polymer and curing agent, and the volume ratio of dimethyl silicone polymer and curing agent is
10:1。
9. the preparation method of flexibility strain transducer according to claim 1, it is characterised in that: step S1, in S2 and S3
Drying mode be to be put into 70 DEG C of convection ovens dry 30min.
10. the preparation method of flexibility strain transducer according to claim 1, it is characterised in that: the flexible strain passes
Sensor be integrally in it is flat, the length of cross section is 20mm, width 10mm, longitudinal section with a thickness of 1-2mm.
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Cited By (8)
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|---|---|---|---|---|
| CN112556899A (en) * | 2020-12-09 | 2021-03-26 | 武汉纺织大学 | Flexible pressure sensor and preparation method thereof |
| CN112853743A (en) * | 2021-02-27 | 2021-05-28 | 南京邮电大学 | Preparation method and application of fabric strain sensor for monitoring physiological information of human body |
| CN112964167A (en) * | 2020-07-21 | 2021-06-15 | 西安工程大学 | Preparation method of segmented detection sensor based on graphene |
| CN113303767A (en) * | 2021-05-26 | 2021-08-27 | 东南大学 | Large-deformation sensing fabric sensor in two-dimensional global range and preparation method |
| CN114166110A (en) * | 2021-03-24 | 2022-03-11 | 北京理工大学 | Lithium ion laminate polymer battery thermal runaway safety precaution uses flexible sensor |
| CN115058884A (en) * | 2022-07-04 | 2022-09-16 | 江西服装学院 | Fabric sensor and preparation method and application thereof |
| CN115125728A (en) * | 2022-07-07 | 2022-09-30 | 武汉纺织大学 | Preparation method of polyurethane film loaded with redox graphene and carbon nano tubes |
| RU2810692C1 (en) * | 2022-11-21 | 2023-12-28 | Федеральное государственное бюджетное образовательное учреждение высшего образования "Сибирский государственный университет науки и технологий имени академика М.Ф. Решетнева" (СибГУ им. М.Ф. Решетнева) | Strain-sensitive silicone sensor and method of its attachment |
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| CN114166110A (en) * | 2021-03-24 | 2022-03-11 | 北京理工大学 | Lithium ion laminate polymer battery thermal runaway safety precaution uses flexible sensor |
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| CN115125728A (en) * | 2022-07-07 | 2022-09-30 | 武汉纺织大学 | Preparation method of polyurethane film loaded with redox graphene and carbon nano tubes |
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