CN108955511A - A kind of structural cracks monitoring clear sensor preparation method based on gas-liquid interface self assembly - Google Patents
A kind of structural cracks monitoring clear sensor preparation method based on gas-liquid interface self assembly Download PDFInfo
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- G—PHYSICS
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- 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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- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L1/00—Measuring force or stress, in general
- G01L1/20—Measuring force or stress, in general by measuring variations in ohmic resistance of solid materials or of electrically-conductive fluids; by making use of electrokinetic cells, i.e. liquid-containing cells wherein an electrical potential is produced or varied upon the application of stress
- G01L1/22—Measuring force or stress, in general by measuring variations in ohmic resistance of solid materials or of electrically-conductive fluids; by making use of electrokinetic cells, i.e. liquid-containing cells wherein an electrical potential is produced or varied upon the application of stress using resistance strain gauges
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Abstract
A kind of structural cracks monitoring clear sensor preparation method based on gas-liquid interface self assembly, the present invention relates to structural cracks monitoring clear sensor preparation methods.The present invention is in order to solve the disadvantage that the prior art has used toxic organic solvent and complex disposal process.SWCNTs does not use any toxic organic solvent, is greatly improved in environmental protection without purification process in the present invention, and can simply realize prepared by large area.The present invention is on the basis of L-B technology and self-assembling method, utilize the thrust of Van der Waals force between carbon nanotube and SDBS aqueous solution, the SWCNTs conductive network being evenly distributed is made in gas-liquid interface, and pass through the viscous electrically conducting transparent SWCNT film for taking czochralski method to be transferred to obtained sandwich structure on PDMS substrate, in monitoring process, when abnormity of power supply, since inventive sensor is transparent, the width in crack can be intuitively observed.The present invention is used for sensor field.
Description
Technical field
The present invention relates to sensor fields, and in particular to the structural cracks monitoring clear sensor system based on gas-liquid interface
Preparation Method.
Background technique
Crack as mechanics section can significantly change stress field and strain field in structure, to destroy the whole of structure
Body, and then the bearing capacity of structure is influenced, the destruction rate of accelerating structure is collection of the structural damage to a certain degree of danger
Middle embodiment.In order to ensure safety, integrality and the durability of structure, it is necessary to take in effective technological means monitoring of structures
Crack, rationally accurately evaluation structure safe condition, and in time repair and control structure damage, prevent the disease of structure
Serious financial consequences and severe social influence brought by development, performance degradation and catastrophic failure.Field of civil engineering at present
The sensing element of deformation and Crack Monitoring for concrete structure mainly has optical fiber, image, ess-strain, piezoelectric sensing, intelligence
Can skin and information coating technology etc., however these technological means for crack progressing monitoring there is also certain limitation, than
Such as when crack expands to the larger value, also in safe range, these technological means are due to certainly for the bearing capacity of concrete structure
The damage of body and the continuation development for being unable to monitor crack.Therefore the flexible sensor for having big emergent property just seems especially
It is important.
There is scholar first to purify MWCNTs and SWCNTs, MWCNTs is dispersed in chloroform later, and by SWCNTs
It is dissolved in the mixed liquor (85:15) of chloroform and DNF, has been prepared later by L-B method in gas-liquid interface stable
Single layer carbon nanotube thin film.There is scholar first to handle SWCNTs acid.Later using octadecylamine (ODA) by SWCNTs functionalization, then will
The SWCNTs of functionalization is dispersed in chloroform, obtains controllable more of large area, high-sequential and thickness by L-B method
Layer SWCNTs film.After having scholar to handle SWCNTs in the mixed liquor of dichloroethanes and PmPV, SWCNTs does not have during this
Have and any covalent functionalization occurs, the SWCNTs for having PmPV to adsorb can stable suspersion in dichloroethanes organic solvent.Lead to later
Cross the SWCNTs film that intensive alignment has been made in L-B method.There is scholar to be first modified SWCNTs imidazole salts, then ultrasonic disperse
It in aqueous solution, is added after trichloroethanes and mixed liquor is ultrasonically treated 12h, SWCNTs-Im will be in water-oil interface by from group
Dress forms one layer of SWCNTs film.There is scholar that SWCNTs is dispersed in 1 ethyl, 3 methylimidazole acetate at room temperature to be made
Stable suspension is placed on a sheet glass, is poured into deionized water along 45° angle, and after organic salt is dissolved in water, SWCNTs can float
It floats on the surface of deionized water and forms thin film.There is scholar by SWCNTs and PFO-BPy mixed solution by ultrasound, centrifugation
Be dispersed in chloroform etc. a series of lower layer's suspension obtained after processing, chloroform can be extended rapidly in gas-liquid interface and
Evaporation, orderly aligned SWCNTs film has just been obtained by self-assembling method.Have scholar first by silicon substrate plate hydrophilic processing and
Then silicon substrate is immersed in using in the SWCNTs aqueous solution through acid processing, passes through-COOH and-NH by amino-functionalization2Between
Electrostatic interaction realizes the self assembly of SWCNTs network structure.
This above-mentioned 2 kinds of preparation methods have used toxic organic solvent, carbon nanotube also to need to carry out during the test
The processing such as purifying and functionalization.
Summary of the invention
The purpose of the present invention is to solve the prior arts to have used lacking for toxic organic solvent and complex disposal process
Point, and propose a kind of structural cracks monitoring clear sensor preparation method based on gas-liquid interface.
A kind of clear sensor preparation method of the structural cracks monitoring based on gas-liquid interface the following steps are included:
Step 1: dimethyl silicone polymer (PDMS) substrate preparation；
Step 1 one: weighing dimethyl silicone polymer and dimethyl silicone polymer curing agent in mass ratio for 10:1, carries out
Magnetic agitation obtains the mixed liquor of dimethyl siloxane and dimethyl silicone polymer curing agent；
Step 1 two: the mixed liquor of dimethyl siloxane and dimethyl silicone polymer curing agent that step 1 one is obtained into
Row vacuum drying, obtains polydimethylsiloxanefilm film；
Step 1 three: the polydimethylsiloxanefilm film that step 1 two obtains is dried, polydimethylsiloxanes are obtained
Alkane (PDMS) substrate；
Step 2: electrically conducting transparent SWCNT film preparation；
Step 2 one: neopelex (SDBS) is dissolved completely in deionized water, detergent alkylate is obtained
Sulfonic acid sodium water solution, set aside for use；
Step 2 two: it is water-soluble that SWCNTs (single-walled carbon nanotube) is dispersed in the dodecyl sodium sulfate that step 2 one obtains
In liquid, ultrasonic disperse is carried out, obtains the mixed liquor of SWCNTs and neopelex, wherein SWCNTs and detergent alkylate
The mass ratio of sodium sulfonate (SDBS) is 1:5；
Step 2 three: the mixed liquor of SWCNTs and neopelex that step 2 two obtains are centrifuged, taken
Upper layer suspension is stand-by out, removes bottom solid matter；
Step 2 four: anhydrous second is added in the mixed liquor of the SWCNTs and neopelex that take step 2 three to take out
The mixed liquor of alcohol, SWCNTs and neopelex and the volume ratio of dehydrated alcohol are 1:5, are centrifuged after carrying out sonic oscillation
Separation, the SWCNTs being centrifuged are dissolved in dehydrated alcohol, for use；
Step 2 five: the mixed solution of the SWCNTs and dehydrated alcohol that are obtained with dropper aspiration step two or four, along glass
The inner wall of ware is slowly dropped into the glass dish for filling 2/3 depth deionized water, after water surface upper layer has one layer of grease to be formed, face
Stop instilling when product is about the 2/3 of glass dish area；Along the position for the mixed solution for instilling SWCNTs and dehydrated alcohol, instill
The configured sodium dodecyl benzene sulfonate aqueous solution of a small amount of step 2 one；
Step 2 six: the dimethyl silicone polymer substrate prepared with tweezers clamping step 1 three, using adherency lifting side
The grease floated in transparent glass ware is slowly bonded on dimethyl silicone polymer substrate by formula, and it is molten to be placed in dehydrated alcohol
It is cleaned in liquid, be stained with SWCNTs one is face-down；
Step 2 seven: it after the dimethyl silicone polymer substrate after step 2 six is cleaned is dried, is tested with multimeter
The resistance of test specimen adds copper-foil conducting electricity when measuring resistance, is bonded between substrate and copper foil with conductive silver paste, obtains electrically conducting transparent
SWCNT film；
Step 2 eight: dimethyl silicone polymer (PDMS) substrate that step 1 three obtains is covered in what step 2 seven obtained
On electrically conducting transparent SWCNT film, the electrically conducting transparent SWCNT film with sandwich structure is obtained.
The invention has the benefit that
The present invention provides a kind of structural cracks monitoring clear sensor preparation method based on gas-liquid interface self assembly, this
SWCNTs, also without using any toxic organic solvent, is greatly improved in environmental protection without purification process in invention.
And it can simply realize prepared by large area.The present invention is on the basis of L-B technology and self-assembling method, using between carbon nanotube
The SWCNTs conductive network being evenly distributed has been made in gas-liquid interface, and has led to for the thrust of Van der Waals force and SDBS aqueous solution
Cross the viscous electrically conducting transparent SWCNT film for taking czochralski method to be transferred to obtained sandwich structure on PDMS substrate.Inventive sensor is
A kind of stretching-sensitive sensor of large deformation (> 100%) in monitoring process, can be with because sensor is transparent thus when abnormity of power supply
Intuitive observation obtains the monitoring of fatigue crack inside the width in crack, especially steel box-girder.
The change rate of the electrically conducting transparent SWCNT film resistor of sandwich structure after 50 fatigues stretch 0~
Good linear dependence is shown in 100% range of strain, passes through the linear equation obtained to test data fitting are as follows:
Y=-10.608+2.438x, goodness of fit R2=0.986, according to the definition of sensitivity coefficient, sandwich structure of the present invention it is saturating
The sensitivity coefficient of bright conduction SWCNT film is 2.44.This illustrate the electrically conducting transparent SWCNT film of sandwich structure 0~
It is a kind of sensing material for having good stretching-sensitive performance within the scope of 100% elongation strain, can be used as sensor for structure
Monitoring of structural cracks etc. is applied in health monitoring field.
Detailed description of the invention
Fig. 1 is the SEM image of single layer SWCNTs network；
Fig. 2 is the transparency of the electrically conducting transparent SWCNT film of the different random conductive networks of number of plies SWCNTs；
Fig. 3 is strain sensing of the sandwich structure electrically conducting transparent SWCNT film after 50 fatigues stretch.
Specific embodiment
Specific embodiment 1: a kind of structural cracks monitoring clear sensor preparation side based on gas-liquid interface self assembly
Method the following steps are included:
Step 1: dimethyl silicone polymer (PDMS) substrate preparation；
Step 1 one: weighing dimethyl silicone polymer and dimethyl silicone polymer curing agent in mass ratio for 10:1, carries out
Magnetic agitation obtains the mixed liquor of dimethyl siloxane and dimethyl silicone polymer curing agent；
Step 1 two: the mixed liquor of dimethyl siloxane and dimethyl silicone polymer curing agent that step 1 one is obtained into
Row vacuum drying, obtains polydimethylsiloxanefilm film；
Step 1 three: the polydimethylsiloxanefilm film that step 1 two obtains is dried, polydimethylsiloxanes are obtained
Alkane (PDMS) substrate；
Step 2: electrically conducting transparent SWCNT film preparation；
Step 2 one: neopelex (SDBS) is dissolved completely in deionized water, detergent alkylate is obtained
Sulfonic acid sodium water solution, set aside for use；
Step 2 two: it is water-soluble that SWCNTs (single-walled carbon nanotube) is dispersed in the dodecyl sodium sulfate that step 2 one obtains
In liquid, ultrasonic disperse is carried out, obtains the mixed liquor of SWCNTs and neopelex, wherein SWCNTs and detergent alkylate
The mass ratio of sodium sulfonate (SDBS) is 1:5；
Step 2 three: the mixed liquor of SWCNTs and neopelex that step 2 two obtains are centrifuged, taken
Upper layer suspension is stand-by out, removes bottom solid matter；
Step 2 four: anhydrous second is added in the mixed liquor of the SWCNTs and neopelex that take step 2 three to take out
The mixed liquor of alcohol, SWCNTs and neopelex and the volume ratio of dehydrated alcohol are 1:5, are centrifuged after carrying out sonic oscillation
Separation, the SWCNTs being centrifuged are dissolved in dehydrated alcohol, for use；
Step 2 five: the mixed solution of the SWCNTs and dehydrated alcohol that are obtained with dropper aspiration step two or four, along glass
The inner wall of ware is slowly dropped into the glass dish for filling 2/3 depth deionized water, after water surface upper layer has one layer of grease to be formed, face
Stop instilling when product is about the 2/3 of glass dish area；Along the position for the mixed solution for instilling SWCNTs and dehydrated alcohol, instill
The configured sodium dodecyl benzene sulfonate aqueous solution of a small amount of step 2 one；
Step 2 six: the dimethyl silicone polymer substrate prepared with tweezers clamping step 1 three, using adherency lifting side
The grease floated in transparent glass ware is slowly bonded on dimethyl silicone polymer substrate by formula, and it is molten to be placed in dehydrated alcohol
It is cleaned in liquid, be stained with SWCNTs one (repeats step 2 six, so that it may obtain bonding different layers of SWCNTs random down
Conductive network)；
Step 2 seven: it after the dimethyl silicone polymer substrate after step 2 six is cleaned is dried, is tested with multimeter
The resistance of test specimen adds copper-foil conducting electricity when measuring resistance, is bonded between substrate and copper foil with conductive silver paste, obtains electrically conducting transparent
SWCNT film；
Step 2 eight: dimethyl silicone polymer (PDMS) substrate that step 1 three obtains is covered in what step 2 seven obtained
On electrically conducting transparent SWCNT film, the electrically conducting transparent SWCNT film for obtaining having sandwich structure (will be obtained in step 1
PDMS substrate is covered in the random conductive network side SWCNTs for the film that step 2 seven obtains, and has just obtained sandwich structure
Electrically conducting transparent SWCNT film) to get to structural cracks monitoring clear sensor.
Specific embodiment 2: the present embodiment is different from the first embodiment in that: magnetic force in the step 1 one
The time of stirring is 10min, revolving speed 300rpm.
Other steps and parameter are same as the specific embodiment one.
Specific embodiment 3: the present embodiment is different from the first and the second embodiment in that: in the step 1 two
The vacuum drying time is 2h, and temperature is 65 DEG C.
Other steps and parameter are the same as one or two specific embodiments.
Specific embodiment 4: unlike one of present embodiment and specific embodiment one to three: the step 1
The time dried in three is 2h, and temperature is 65 DEG C.
Other steps and parameter are identical as one of specific embodiment one to three.
Specific embodiment 5: unlike one of present embodiment and specific embodiment one to four: the step 2
The specific mistake that sodium dodecyl benzene sulfonate aqueous solution is obtained in one is known as:
Neopelex is dissolved in deionized water, solution is placed in the baking oven that temperature is 85 DEG C and is stood
After 10min, the ultrasound 1h in the ultrasonic cleaning instrument of 200W power, then it is stirred 1h, set aside for use.
Other steps and parameter are identical as one of specific embodiment one to four.
Specific embodiment 6: unlike one of present embodiment and specific embodiment one to five: the step 2
The time of ultrasonic disperse is that for 24 hours, temperature is 20 DEG C~45 DEG C in two.
Other steps and parameter are identical as one of specific embodiment one to five.
Specific embodiment 7: unlike one of present embodiment and specific embodiment one to six: the step 2
The time being centrifuged in three is 60min, revolving speed 10000rpm.
Other steps and parameter are identical as one of specific embodiment one to six.
Specific embodiment 8: unlike one of present embodiment and specific embodiment one to seven: the step 2
The time of sonic oscillation is 30min in four, and the time of centrifugation is 60min, revolving speed 10000rpm.
Other steps and parameter are identical as one of specific embodiment one to seven.
Specific embodiment 9: unlike one of present embodiment and specific embodiment one to eight: the step 2
Dimethyl silicone polymer substrate is obtained having a size of 35mm × 10mm × 0.2mm in six.
Other steps and parameter are identical as one of specific embodiment one to eight.
Embodiment one:
The preparation process of the electrically conducting transparent SWCNT film of sandwich structure is as follows in this test:
Step 1: PDMS substrate preparation
(1) ontology and curing agent of PDMS, mass ratio 10:1 are weighed.Magnetic agitation 10min at 300 rpm later will
Obtained liquid is imported in plastic culture dish by certain mass.
(2) culture dish equipped with PDMS is horizontal positioned in a vacuum drying oven, vacuumize exclude bubble in PDMS and
Make the uniform ground that forms a film, 65 DEG C of vacuum drying 2h.Film thickness obtained is at 200 μm or so by such manner.
(3) culture dish equipped with PDMS film after vacuum drying is placed in baking oven, dries 2h at 65 DEG C.
Step 2: electrically conducting transparent SWCNT film preparation
(1) prepared by neopelex (SDBS) aqueous solution.64mgSDBS is dissolved in deionized water, in order to complete
Solution is placed in the baking oven that temperature is 85 DEG C and stands 10min by fully dissolved, surpasses in the ultrasonic cleaning instrument of 200W power later
Sound 1h is finally stirred for 1h, set aside for use.The purpose operated in this way mainly makes SDBS sufficiently completely be dissolved in aqueous solution.
(2) 8.0mgSWCNTs is dispersed in above-mentioned dodecyl sodium sulfate (SDBS) aqueous solution of 5ml, wherein
The mass ratio of SWCNTs and SDBS is 1:5.For 24 hours, power is the ultrasonic cleaning instrument of 200W to (20~45 DEG C) ultrasonic disperse at room temperature.
(3) resulting SWCNTs/SDBS solution is centrifugated 60min at 10000rpm, upper layer suspension is poured into
Stand-by in Clear glass bottles and jars, the removal of bottom solid matter should not.
(4) the SWCNTs/SDBS mixed solution of 1ml or so is measured in Clear glass bottles and jars, and 5ml dehydrated alcohol is added, it
Then resulting solution is centrifugated 60min by sonic oscillation 30min afterwards at 10000rpm, finally centrifugation obtains
SWCNTs is dissolved in dehydrated alcohol, is placed in Clear glass bottles and jars stand-by.
(5) mixed solution of the SWCNTs/alcohol of previous step is drawn with dropper, it is slow along the inner wall of glass dish
It instills in the Φ 96mm × 15mm glass dish for filling 2/3 depth deionized water, after water surface upper layer has one layer of grease to be formed, face
Stop instilling when product is about the 2/3 of glass dish area.Later along the position for instilling SWCNTs/alcohol mixed solution, instill
The configured SDBS aqueous solution of a small amount of first step.The SDBS aqueous solution instilled afterwards plays certain thrust, so that in gas-liquid circle
The SWCNTs conductive network that face is self-assembly of is more form compact and stable.
(6) PDMS film prepared with tweezers clamping step 1, having a size of 35mm × 10mm × 0.2mm, using adherency
The grease floated in transparent glass ware is slowly bonded on PDMS film by lifting mode, is then placed molten with dehydrated alcohol
It is cleaned in liquid, be stained with SWCNTs one is face-down.
(7) the PDMS/SWCNTs film after cleaning is finally placed in 65 DEG C of baking ovens dry 1h.It is surveyed later with multimeter
It has a try the resistance of part.The copper-foil conducting electricity for adding 0.2mm thickness when measuring resistance, is bonded between film and copper foil with conductive silver paste.
Single layer is uniformly and continuous, and the SEM image with the good random conductive network of microstructure characteristic SWCNTs is shown in figure
1。
Fig. 2 indicate be the different random conductive networks of number of plies SWCNTs electrically conducting transparent SWCNT film transparency, 1~6
The transparency (550nm) of the electrically conducting transparent SWCNT film of the layer random conductive network of SWCNTs is respectively 98%, 93%, 91%,
89%, 81% and 79%.
Fig. 3 show the variation of the electrically conducting transparent SWCNT film resistor of the sandwich structure after 50 fatigues stretch
Rate shows good linear dependence in 0~100% range of strain, passes through the linear obtained to test data fitting
Equation are as follows: y=-10.608+2.438x, goodness of fit R2=0.986, according to the definition of sensitivity coefficient, this sandwich structure
Electrically conducting transparent SWCNT film sensitivity coefficient be 2.44.This illustrates the electrically conducting transparent SWCNT film of sandwich structure 0
It is a kind of sensing material for having good stretching-sensitive performance within the scope of~100% elongation strain, can be used as sensor for tying
Monitoring of structural cracks etc. is applied in structure health monitoring field.
The present invention can also have other various embodiments, without deviating from the spirit and substance of the present invention, this field
Technical staff makes various corresponding changes and modifications in accordance with the present invention, but these corresponding changes and modifications all should belong to
The protection scope of the appended claims of the present invention.
Claims (9)
1. a kind of structural cracks monitoring clear sensor preparation method based on gas-liquid interface self assembly, it is characterised in that: institute
State the structural cracks monitoring clear sensor preparation method based on gas-liquid interface self assembly the following steps are included:
Step 1: dimethyl silicone polymer substrate preparation；
Step 1 one: taking dimethyl silicone polymer and dimethyl silicone polymer curing agent, carries out magnetic agitation, obtains dimethyl-silicon
The mixed liquor of oxygen alkane and dimethyl silicone polymer curing agent；
Step 1 two: the mixed liquor of dimethyl siloxane and dimethyl silicone polymer curing agent that step 1 one is obtained carries out true
Sky is dry, obtains polydimethylsiloxanefilm film；
Step 1 three: the polydimethylsiloxanefilm film that step 1 two obtains is dried, and obtains dimethyl silicone polymer base
Plate；
Step 2: electrically conducting transparent SWCNT film preparation；
Step 2 one: neopelex is dissolved completely in deionized water, and it is water-soluble to obtain neopelex
Liquid, set aside for use；
Step 2 two: SWCNTs being dispersed in the sodium dodecyl sulfate aqueous solution that step 2 one obtains, and carries out ultrasonic disperse,
The mixed liquor of SWCNTs and neopelex is obtained, the SWCNTs is single-walled carbon nanotube；
Step 2 three: the mixed liquor of SWCNTs and neopelex that step 2 two obtains are centrifuged, in taking-up
Layer suspension is stand-by, removes bottom solid matter；
Step 2 four: dehydrated alcohol is added in the mixed liquor of the SWCNTs and neopelex that take step 2 three to take out, into
It is centrifugated after row sonic oscillation, the SWCNTs being centrifuged is dissolved in dehydrated alcohol, for use；
Step 2 five: the mixed solution of the SWCNTs and dehydrated alcohol that are obtained with dropper aspiration step two or four, along glass dish
Inner wall instills in the glass dish for filling 2/3 depth deionized water, and after water surface upper layer has one layer of grease to be formed, area is about
Glass dish area 2/3 when stop instill；Along the position for the mixed solution for instilling SWCNTs and dehydrated alcohol, step 2 one is instilled
Configured sodium dodecyl benzene sulfonate aqueous solution；
Step 2 six: the dimethyl silicone polymer substrate prepared with tweezers clamping step 1 three, it will using adherency lifting mode
The grease floated in transparent glass ware is bonded on dimethyl silicone polymer substrate, is placed in ethanol solution and is cleaned,
Be stained with SWCNTs one is face-down；
Step 2 seven: after the dimethyl silicone polymer substrate after step 2 six is cleaned is dried, test specimen is tested with multimeter
Resistance, measure resistance when add copper-foil conducting electricity, be bonded between substrate and copper foil with conductive silver paste, it is thin to obtain electrically conducting transparent SWCNT
Film；
Step 2 eight: the dimethyl silicone polymer substrate that step 1 three obtains is covered in the electrically conducting transparent that step 2 seven obtains
On SWCNT film, the electrically conducting transparent SWCNT film with sandwich structure is obtained.
2. a kind of structural cracks monitoring based on gas-liquid interface self assembly according to claim 1 is prepared with clear sensor
Method, it is characterised in that: the mass ratio of dimethyl silicone polymer and dimethyl silicone polymer curing agent is in the step 1 one
10:1, the time of magnetic agitation are 10min, revolving speed 300rpm.
3. a kind of structural cracks monitoring based on gas-liquid interface self assembly according to claim 2 is prepared with clear sensor
Method, it is characterised in that: the vacuum drying time is 2h in the step 1 two, and temperature is 65 DEG C.
4. a kind of structural cracks monitoring based on gas-liquid interface self assembly according to claim 3 is prepared with clear sensor
Method, it is characterised in that: the time dried in the step 1 three is 2h, and temperature is 65 DEG C.
5. a kind of structural cracks monitoring based on gas-liquid interface self assembly according to claim 4 is prepared with clear sensor
Method, it is characterised in that: the specific mistake that sodium dodecyl benzene sulfonate aqueous solution is obtained in the step 2 one is known as:
Neopelex is dissolved in deionized water, solution is placed in the baking oven that temperature is 85 DEG C and is stood
After 10min, the ultrasound 1h in the ultrasonic cleaning instrument of 200W power, then it is stirred 1h, set aside for use.
6. a kind of structural cracks monitoring based on gas-liquid interface self assembly according to claim 5 is prepared with clear sensor
Method, it is characterised in that: the mass ratio of SWCNTs and neopelex is 1:5, ultrasonic disperse in the step 2 two
Time be for 24 hours, temperature be 20 DEG C~45 DEG C.
7. a kind of structural cracks monitoring based on gas-liquid interface self assembly according to claim 6 is prepared with clear sensor
Method, it is characterised in that: the time being centrifuged in the step 2 three is 60min, revolving speed 10000rpm.
8. a kind of structural cracks monitoring based on gas-liquid interface self assembly according to claim 7 is prepared with clear sensor
Method, it is characterised in that: the body of the mixed liquor and dehydrated alcohol of SWCNTs and neopelex in the step 2 four
Product is than being 1:5, and the time of sonic oscillation is 30min, and the time of centrifugation is 60min, revolving speed 10000rpm.
9. a kind of structural cracks monitoring based on gas-liquid interface self assembly according to claim 8 is prepared with clear sensor
Method, it is characterised in that: dimethyl silicone polymer substrate is obtained having a size of 35mm × 10mm × 0.2mm in the step 2 six.
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| CN111253751A (en) * | 2020-01-21 | 2020-06-09 | 齐鲁工业大学 | Carbon nanotube polydimethylsiloxane composite material and preparation method and application thereof |
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