CN104931350A - Method for quantitatively testing flexibility of flexible graphene membrane - Google Patents
Method for quantitatively testing flexibility of flexible graphene membrane Download PDFInfo
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- CN104931350A CN104931350A CN201510321386.0A CN201510321386A CN104931350A CN 104931350 A CN104931350 A CN 104931350A CN 201510321386 A CN201510321386 A CN 201510321386A CN 104931350 A CN104931350 A CN 104931350A
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Abstract
A method for quantitatively testing the flexibility of a flexible graphene membrane comprises the steps of using a double faced adhesive tape to adhere a part of a flexible graphene membrane sample strip to the side face of an upper sample table (1), using a pair of tweezers to adhere the other part of the flexible graphene membrane sample strip to the side face of a lower sample table (2), enabling the positions of the flexible graphene membrane sample strip on the upper sample table (1) and the lower sample table (2) to correspond vertically, upwards moving the lower sample table (2) in parallel, changing the distance between the upper sample table (1) and the lower sample table (2), using a microscope to observe the radian of the turned-back sample strip and then drawing a concentric circle at the position of maximum radian of the sample strip when the flexible graphene membrane sample strip just starts to crack, wherein the radius of the circle is the curvature radius of the membrane. The method for quantitatively testing the flexibility of the flexible graphene membrane has the advantages of being simple and easy to operate, high in reproducibility and capable of performing quantitative expression.
Description
Technical field
The invention belongs to a kind of method of testing of mechanical property, be specifically related to a kind of method of testing of pliability of Flexible graphene film.
Background technology
About the method for testing of Flexible graphene thin film mechanical performance, current comparative maturity be test to its pulling strengrth and stretch modulus, the main instrument used is dynamic thermomechanical analysis apparatus and filament stretch instrument, in the test of Flexible graphene base film pliability, mainly also be in its qualitative test stage at present, the hand of tweezers or operator is such as utilized to be bent, then take pictures, or with reversed bending test [Hierarchical Graphene – Carbon Fiber Composite Paper as a Flexible Lateral Heat Spreader. AdvancedFunctional Materials, 2014.24 (27), 4222 one kinds of flexible exfoliated graphite alkene-carbon fiber laminated films towards heat radiation, advanced function material, 2014. 24 (27), 4222], this simply qualitative, can characterize for single sample, but if the pliability of a serial sample to be compared, just need to carry out quantitatively characterizing to it, but accomplish that a kind of reasonably characterization method is not also had to its quantitatively characterizing at present, therefore we propose a kind of method pliability of Flexible graphene base film being carried out quantitatively characterizing.
Summary of the invention
The object of the invention is to the shortcoming overcoming prior art, provide a kind of device to build conveniently, operate simple and easy, what reproducibility was high can the method for pliability of quantitatively characterizing Flexible graphene base film.
In order to solve the technical matters of above-mentioned existence, technical scheme of the present invention is as follows:
With double faced adhesive tape, the sample strip of a Graphene fexible film part is pasted onto the side of upper sample stage 1, with tweezers, graphene-based for another part film sample bar is pasted onto the side of lower sample stage 2, and the sample strip of Graphene fexible film is corresponding up and down in the position of upper sample stage 1 and lower sample stage 2, move in parallel lower sample stage 2 up and down, distance in change between sample stage 1 and lower sample stage 2, when just having started to occur slight crack by microscopic graphene film sample strip, the radian of the sample strip turned back, then the concentric circles at its maximum radian place is drawn, this radius of circle is the radius-of-curvature of film.
The length EI of described graphene film sample strip is 10-15mm, and width EF is 1-3mm.
Described double faced adhesive tape is conducting resinl or common double faced adhesive tape.
The long limit of described sample strip EI need be parallel with the limit of sample stage.
Described microscope is optical microscope or scanning electron microscope.
Described sample strip is the 1/3-2/3 of sample strip EI length in upper sample stage EG edge lengths.
When taking pictures with microscopic examination, the multiple that microscope amplifies is 150-300 times.
The radian of the film of Graphene is that the bending place of examining under a microscope film has just started to occur that slight crack is the radian of graphene film, and then we are by drawing the radius-of-curvature of the concentric circles determination film of maximum bending place.
The film that is suitable for be flexible graphene film, the film thickness that is suitable for be 5-25 μm.
Compared with prior art, beneficial effect of the present invention is: the invention provides a kind of can the method for pliability of quantitatively characterizing Flexible graphene film, let us can be characterized the pliability of a serial graphene film, and be unlikely to only by sense organ qualification, we can be judged accurately, and the flexibility of which kind of graphene film in a series is better, test for the pliability of follow-up fexible film also provides some technical supports, simultaneously the method also has device and builds conveniently, operate simple and easy, introduction is very fast, reproducibility advantages of higher.
Accompanying drawing explanation
Fig. 1 is the schematic diagram that inventive samples bar is bonded on double faced adhesive tape.
Fig. 2 is that sample strip is bonded at schematic diagram sample stage carrying out measure.
As shown in the figure, ABCD is double faced adhesive tape, and EIJF is sample strip, and EGHF is sample strip and sticking double faced adhesive tape part, and GIJH is sample strip not adhesive portion, and 1 is upper sample stage, and 2 is lower sample stages, and 3 is upper double faced adhesive tapes, and 4 is lower double faced adhesive tapes.
Embodiment
Embodiment 1
Cutting a length is 10mm, width is 1mm, thickness is the Flexible graphene film sample bar of 5 μm, and after the EGHF of the sample strip EG length of side 5mm of graphene-based flexible film is pasted onto common double faced adhesive tape one side, sample strip EG limit need be parallel with the limit of common double faced adhesive tape AB simultaneously.With common double faced adhesive tape, the sample strip of graphene-based flexible film is pasted onto on sample stage 1 again, turn back the graphene film sample strip having more common double faced adhesive tape part GIJH with tweezers the another side of common double faced adhesive tape, during sample strip of turning back, the GI limit after turning back need be parallel with not needing the EG limit of fold back portion.Amplify 150 times by optics Electronic Speculum to observe, change the position that sample strip IJ edge break goes back to, until bending place starts to occur slight crack, the radian of the sample strip of then being turned back by optical microscope inspection, then the concentric circles at its maximum radian place is drawn, this radius of circle is the radius-of-curvature of film, and the radius-of-curvature obtaining film after test is 150 μm.
Embodiment 2
Cutting a length is 10mm, and width is 1mm, and thickness is the Flexible graphene film sample bar of 5 μm, sample strip EG length of side 10mm, and optics Electronic Speculum is amplified 300 times and observed, and the radius-of-curvature obtaining film after changing test is 300 μm.All the other are with embodiment 1.
Embodiment 3
Cutting a length is 12mm, and width is 2mm, and thickness is the Flexible graphene film sample bar of 15 μm, and double faced adhesive tape is conducting resinl, sample strip EG length of side 4mm, and optics Electronic Speculum is amplified 250 times and observed, and the radius-of-curvature obtaining film after changing test is 200 μm.All the other are with embodiment 1.
Claims (8)
1. a quantitative measuring method for Graphene fexible film pliability, is characterized in that comprising the following steps:
With double faced adhesive tape, a sample strip part for Graphene fexible film is pasted onto the side of upper sample stage (1), with tweezers, graphene-based for another part film sample bar is pasted onto the side of lower sample stage (2), and the sample strip of Graphene fexible film is corresponding up and down in the position of upper sample stage (1) and lower sample stage (2), upwards move in parallel lower sample stage (2), distance in change between sample stage (1) and lower sample stage (2), when just having started to occur slight crack by microscopic graphene film sample strip, the radian of the sample strip turned back, then the concentric circles at its maximum radian place is drawn, this radius of circle is the radius-of-curvature of film.
2. the quantitative measuring method of a kind of Graphene fexible film pliability as claimed in claim 1, it is characterized in that the length EI of described graphene film sample strip is 10-15mm, width EF is 1-3mm.
3. the quantitative measuring method of a kind of Graphene fexible film pliability as claimed in claim 1, is characterized in that described double faced adhesive tape is conducting resinl or common double faced adhesive tape.
4. the quantitative measuring method of a kind of Graphene fexible film pliability as claimed in claim 1, is characterized in that the long limit of described sample strip EI need be parallel with the limit of lower sample stage (2) with upper sample stage (1).
5. the quantitative measuring method of a kind of Graphene fexible film pliability as claimed in claim 1, is characterized in that described sample strip is the 1/3-2/3 of sample strip EI length in upper sample stage EG edge lengths.
6. the quantitative measuring method of a kind of Graphene fexible film pliability as claimed in claim 1, is characterized in that described microscope is optical microscope or scanning electron microscope.
7. the quantitative measuring method of a kind of Graphene fexible film pliability as claimed in claim 1, is characterized in that the multiple that microscope amplifies is 150-300 times.
8. the quantitative measuring method of a kind of Graphene fexible film pliability as claimed in claim 1, is characterized in that the thickness of described Graphene fexible film is 5-25 μm.
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| CN201510321386.0A CN104931350A (en) | 2015-06-11 | 2015-06-11 | Method for quantitatively testing flexibility of flexible graphene membrane |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108513613A (en) * | 2017-03-28 | 2018-09-07 | 深圳市柔宇科技有限公司 | Flexible material static state crimps measurement jig and method |
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| CN101726442A (en) * | 2008-10-24 | 2010-06-09 | 中国科学院金属研究所 | In situ evaluation system and method of reliability of thin-film materials on flexible electronic substrate |
| WO2012054710A1 (en) * | 2010-10-22 | 2012-04-26 | Celgard Llc | Testing and measuring devices, systems, components and methods |
| CN102539318A (en) * | 2011-12-21 | 2012-07-04 | 广东生益科技股份有限公司 | Assessment method of copper clad laminate mechanical properties |
| CN103047947A (en) * | 2012-12-14 | 2013-04-17 | 北京工业大学 | Method for representing nano film micro-area deformation area by virtue of combination of photetching technique and transmitted electron microtechnique |
| CN203118902U (en) * | 2012-11-22 | 2013-08-07 | 北京大学 | Transmission electron microscope sample bearing apparatus |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101726442A (en) * | 2008-10-24 | 2010-06-09 | 中国科学院金属研究所 | In situ evaluation system and method of reliability of thin-film materials on flexible electronic substrate |
| WO2012054710A1 (en) * | 2010-10-22 | 2012-04-26 | Celgard Llc | Testing and measuring devices, systems, components and methods |
| CN102539318A (en) * | 2011-12-21 | 2012-07-04 | 广东生益科技股份有限公司 | Assessment method of copper clad laminate mechanical properties |
| CN203118902U (en) * | 2012-11-22 | 2013-08-07 | 北京大学 | Transmission electron microscope sample bearing apparatus |
| CN103047947A (en) * | 2012-12-14 | 2013-04-17 | 北京工业大学 | Method for representing nano film micro-area deformation area by virtue of combination of photetching technique and transmitted electron microtechnique |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108513613A (en) * | 2017-03-28 | 2018-09-07 | 深圳市柔宇科技有限公司 | Flexible material static state crimps measurement jig and method |
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Application publication date: 20150923 |