Device for measuring elastic modulus of graphene in water based on mechanical stretching method

Abstract

The utility model provides a device for measuring the elasticity modulus of graphene in water based on a mechanical stretching method, which comprises electronic graphene stretchers, a water tank and a graphene resistance measuring instrument, the electronic graphene stretchers are arranged on two sides of the water tank and are used for fixing graphene materials and applying external force to deform the graphene materials, and the graphene resistance measuring instrument is used for measuring the elasticity modulus of the graphene in the water. The graphene resistance measuring instrument is arranged outside the water tank and is connected with the graphene material in the water tank through a wire to measure the resistance of the graphene material, the initial resistance of the graphene material is measured through the graphene resistance measuring instrument, and then the force application handle is rotated to change the length of the graphene material; measuring the graphene material through a graphene resistance measuring instrument to obtain the resistance after the length is changed, measuring the tensile force of the rotating force application handle on the graphene material through a tensile force electronic display of the electronic graphene extensometer, and then substituting the measured physical quantity into an elastic modulus calculation formula to obtain the elastic modulus of the graphene material. The elasticity modulus of the graphene material in water can be completed.

Description

TECHNICAL FIELD

[0001] The utility model belongs to material elasticity modulus measurement technical field, concretely relates to a device based on mechanical tensile method measures elasticity modulus of graphene in water. BACKGROUND

[0002] Graphene is a two-dimensional material with excellent mechanical properties, and its elastic modulus is one of the important indicators of its mechanical properties. However, the elastic modulus of graphene in water may change, which has an important influence on its application in various fields. The existing measuring devices and methods are mostly suitable for testing in air and cannot reflect the elastic modulus of graphene in water. UTILITY MODEL CONTENT

[0003] The utility model aims at measuring the elastic modulus of graphene material in water, and provides a device based on mechanical tensile method for measuring the elastic modulus of graphene in water.

[0004] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a device based on mechanical tensile method for measuring the elastic modulus of graphene in water, comprising: an electronic graphene stretcher, a water tank and a graphene resistance measuring instrument.

[0005] The electronic graphene stretcher is arranged on both sides of the water tank and is used for fixing graphene material and applying external force to deform it. The graphene resistance measuring instrument is arranged outside the water tank and is connected with the graphene material in the water tank through wires to measure the resistance of the graphene material.

[0006] Further, the electronic graphene stretcher comprises a force handle, a tension electronic display, a material fixing seat, a fixing support and a fixed end connector.

[0007] The force handle and the material fixing seat are arranged on the tension electronic display, and one end of the force handle is connected with the material fixing seat. The graphene material is stretched or compressed by rotating the force handle to drive the material fixing seat to slide. The fixed end connector is installed on one side of the water tank through the fixing support.

[0008] Further, the tension electronic display is fixedly installed on a tension rail, and the tension rail is fixedly installed on the other side of the water tank.

[0009] Further, the water tank is a waterproof water tank.

[0010] Further, one end of the wire is provided with a waterproof conductive connector, which is wrapped and connected on the graphene material to isolate the graphene material at the connection from the water in the water tank to play a waterproof role.

[0011] Further, the wire is a waterproof wire.

[0012] Advantages:

[0013] The utility model discloses an electronic graphene tensile tester fixes the graphene material two ends through material fixed seat and fixed end connector, and the graphene material traverses the water tank, when the water tank fills up the water, measures the initial resistance of graphene material through graphene resistance measuring instrument, rotates the force handle to make the length of graphene material change, and measures graphene material through graphene resistance measuring instrument again, obtains the resistance after length change, and the tension electronic display of electronic graphene tensile tester measures the tension of graphene material to rotating force handle, then calculates the elastic modulus of graphene material according to the above measured physical quantity, thereby realizes the tensile test to the graphene material in water to evaluate the change of its elastic modulus. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is the device structure plan view of the utility model.

[0015] Figure 2 It is the small deformation schematic view of graphene material tensile diagram generation in the embodiment of the utility model.

[0016] In the drawing: 1, electronic graphene tensile tester, 2, water tank, 3, graphene resistance measuring instrument, 4, force handle, 5, tension electronic display, 6, material fixed seat, 7, fixed support, 8, fixed end connector, 9, tension track, 10, wire. DETAILED DESCRIPTION

[0017] The utility model will be explained further in connection with the drawings.

[0018] The utility model provides a kind of based on mechanical tensile method measures the device of the elastic modulus of graphene in water, it include: electronic graphene tensile tester 1, water tank 2 and graphene resistance measuring instrument 3.

[0019] Electronic graphene tensile tester 1 is arranged at water tank 2 both sides, for fixed graphene material and exert external force to make it deformation, the graphene resistance measuring instrument 3 is arranged at water tank 2 outside, and it is connected with the graphene material in water tank 2 inside by wire 10 to measure the resistance of graphene material.

[0020] Wherein, electronic graphene tensile tester 1 includes: force handle 4, tension electronic display 5, material fixed seat 6, fixed support 7 and fixed end connector 8.

[0021] The force applying handle 4 and the material fixing base 6 are arranged above the tensile electronic display 5, one end of the force applying handle 4 is connected with the material fixing base 6, the material fixing base 6 is driven to slide by rotating the force applying handle 4 to stretch or compress the graphene material, the fixed end connector 8 is installed on the right end of the sink 2 through the fixing support 7, the tensile electronic display 5 is fixedly installed on the tensile track 9, and the tensile track 9 is fixedly installed on the right end of the sink 2.

[0022] In the example, the two wires 10 are provided with waterproof conductive joints at one end, and the other ends of the two wires are connected with the graphene resistance measuring instrument 3, the wires 10 are waterproof wires, the waterproof conductive joints are wrapped on the graphene material, and the waterproof conductive joints are used for isolating the graphene material at the connecting position from water in the sink 2 to play a waterproof role, the electronic graphene tensile instrument 1 can measure the resistance of the graphene material between the two waterproof conductive joints through the wires 10 and the waterproof conductive joints, the sink 2 is a waterproof sink, the tensile track has two and is fixedly installed on the right end of the sink 2, and the waterproof conductive joint adopts the existing.

[0023] The working process of the utility model is as follows:

[0024] First, the fixing support 7 is installed on the right end of the sink 2, the fixed end connector 8 is installed on the fixing support 7, then the tensile electronic display 5 is installed on the tensile track 9, the force applying handle 4 and the material fixing base 6 are installed below the tensile electronic display 5, the test end of the tensile electronic display 5 is connected with the material fixing base 6 to measure the tensile force of the force applying handle 4, one end of the graphene material is wound on the fixed end connector 8, and the other end is fixed on the material fixing base 6 through the sink 2, so that the graphene material is straightened and arranged on the same horizontal plane.

[0025] Then, the two waterproof conductive joints are connected to the graphene material in the sink, the two waterproof conductive joints are connected with the graphene tensile instrument 1 through the wires 10, the voltage and current of the graphene resistance measuring instrument 3 are controlled, the voltage and current are moderate, water is injected into the sink, and the graphene material is completely immersed in water.

[0026] Finally, the force applying handle 4 is rotated to drive the material fixing base 6 to slide to stretch or compress the graphene material, the length of the graphene material changes, the tensile force of the force applying handle 4 is measured through the tensile electronic display 5, the initial resistance and the resistance after length change of the graphene material are measured through the graphene tensile instrument 1, the tensile force, the initial resistance and the resistance after length change of the graphene material are obtained, and the elastic modulus of the graphene material in water is obtained by combining the elastic modulus calculation formula.

[0027] The elastic modulus calculation formula is as follows:

[0028]

[0029] Wherein, F is the pulling force applied by the force handle, L is the length of the graphene material between the two waterproof conductive connectors before deformation, p is the resistivity, AR is the resistance change value of the graphene material before and after deformation, which is the difference between the initial resistance of the graphene material and the resistance after length change, b is the width of the graphene material, and h is the thickness of the graphene material.

[0030] The derivation process of the elastic modulus calculation formula is as follows:

[0031] According to Hooke's law, within the elastic limit, stress σ is proportional to strain ε, that is, σ = Eε, wherein E is the elastic modulus. Stress σ is equal to force F divided by the force area A, that is,

[0032]

[0033] Strain ε is equal to deformation ΔL divided by the original length L, that is,

[0034]

[0035] For this material, when it is subjected to a pulling force F, a small tensile deformation occurs. Assuming that the measured part between the two waterproof conductive connectors before deformation has a length of L, a width of b, and a thickness of h, then the force area A = b x h.

[0036] According to the law of resistance (p is the resistivity), when the graphene has a small deformation ΔL, the length becomes L + ΔL, and the resistance becomes

[0037]

[0038] Given the measured resistance change ΔR = R' - R, and Substituting the above two equations into equation (4) gives Therefore,

[0039]

[0040] Substituting equation (4) into equation (2) gives

[0041]

[0042] Since and σ = Eε, we have

[0043]

[0044] Substituting A = b x h into equation (6) gives

[0045]

[0046] The utility model discloses a graphene resistance measuring instrument measures the initial resistance of graphene material, rotates the force handle again to make the length of graphene material change, and measures graphene material again through graphene resistance measuring instrument, obtains the resistance after length change, and the tension electronic display of electronic graphene tensile instrument measures the tension of graphene material to rotating force handle, then the above -mentioned measured physical quantity is substituted into elastic modulus calculation formula, can complete the elastic modulus of graphene material in water.

[0047] The above only is the preferred implementation of the utility model, should point out, for ordinary technical personnel in this technical field, on the premise of not departing from the principle of the utility model, can also make a number of improvements and refinements, these improvements and refinements also should be regarded as the protection range of the utility model.

Claims

1. An apparatus for measuring the elastic modulus of graphene in water based on the mechanical tensile method, characterized in that, Include: Electronic graphene tensile tester (1), sink (2) and graphene resistance measuring instrument (3); The electronic graphene tensile tester (1) is arranged on both sides of the sink (2), used for fixing graphene material and applying external force to make it deform, and the graphene resistance measuring instrument (3) is arranged outside the sink (2) and connected with the graphene material inside the sink (2) through the wire (10) to measure the resistance of the graphene material.

2. The device for measuring the elastic modulus of graphene in water based on the mechanical tensile method according to claim 1, characterized in that, The electronic graphene tensile tester (1) comprises: a force handle (4), a tension electronic display (5), a material fixing seat (6), a fixing support (7) and a fixed end connector (8); The force handle (4) and the material fixing seat (6) are arranged on the tension electronic display (5), and one end of the force handle (4) is connected with the material fixing seat (6), and the graphene material is stretched or compressed by rotating the force handle (4) to drive the material fixing seat (6) to slide, and the fixed end connector (8) is installed on one side of the sink (2) through the fixing support (7).

3. The device for measuring the elastic modulus of graphene in water based on the mechanical tensile method according to claim 2, characterized in that, The tension electronic display (5) is fixedly installed on the tension rail (9), and the tension rail (9) is fixedly installed on the other side of the sink (2).

4. The device for measuring the elastic modulus of graphene in water based on the mechanical tensile method according to claim 1, characterized in that, The sink (2) is a waterproof sink.

5. The device for measuring the elastic modulus of graphene in water based on the mechanical tensile method according to claim 1, characterized in that, One end of the wire (10) is provided with a waterproof conductive connector, which is wrapped and connected on the graphene material, used to isolate the connected graphene material from the water in the sink (2) to play a waterproof role.

6. The device for measuring the elastic modulus of graphene in water based on the mechanical tensile method according to claim 5, characterized in that, The wire (10) is a waterproof wire.

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