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Method for measuring nano monofilament tensile strength

A technology of nanofiber and tensile strength, which is applied in the field of measurement of fiber monofilament tensile strength, can solve problems such as complicated operation and inconvenient operation, and achieve high application value, convenient operation and strong practicability

Inactive Publication Date: 2012-02-15
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to solve the problems of complex operation and inconvenient operation in the existing method for measuring nanofibers

Method used

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  • Method for measuring nano monofilament tensile strength
  • Method for measuring nano monofilament tensile strength
  • Method for measuring nano monofilament tensile strength

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach 1

[0010] Embodiment 1: The method for measuring the tensile strength of nanofibers in this embodiment is achieved through the following steps: 1. Fix the two ends of the nanofibers on the concave template, and then drop superglue in the middle of the nanofibers Curing at room temperature, that is to obtain small balls with a diameter of 1-100 microns on the nanofibers; 2. Then adjust the clamping head to clamp the small balls on the nanofibers, and connect the clamping head to the mechanical sensor. The sensor is connected to the computer; 3. The chuck is fixed, and the concave template is slowly pulled along the axial direction of the nanofiber at a speed of 1-100 μm / min, and the tensile load borne by the chuck is recorded by the computer in real time until the nanofiber is pulled broken, get the maximum tensile load F m , the F m into the formula σ t =F m / s to calculate the strength σ of the nanofiber t ; That is, the nanofiber tensile strength measurement is completed; w...

specific Embodiment approach 2

[0012] Embodiment 2: This embodiment differs from Embodiment 1 in that the superglue described in step 1 is 502 superglue or 101 superglue. Other steps and parameters are the same as in the first embodiment.

specific Embodiment approach 3

[0013] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that the concave template material in step 1 is paper, metal, single crystal silicon wafer or plastic. Other steps and parameters are the same as those in Embodiment 1 or Embodiment 2.

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Abstract

The invention discloses a method for measuring nano monofilament tensile strength, relates to a method for measuring fiber tensile strength, and solves the problems of complex operation and inconvenient operation in the conventional method for measuring nano-fibers. The method for measuring the nano monofilament tensile strength comprises the following steps of: 1, fixing the nano-fibers on a concave template, dropping super glue in the middles of the nano-fibers, and curing to obtain a small ball; 2, clamping the small ball by using a clamp, connecting the clamp with a mechanical sensor, and connecting the mechanical sensor with a computer; 3, slowly pulling the concave template along the nano-fiber direction, recording the tensile load borne by the clamp in real time by the computer until the nano-fibers are in tensile failure, substituting the maximum tensile load Fm into a formula that sigma t=Fm / s to calculate the intensity sigma t of the nano-fibers and finishing the measurement of the nano monofilament tensile strength. The method for measuring the nano fiber tensile strength has the advantages of simpleness, easy operation and high accuracy, can be operated in open environment, has convenient operation, and has the accuracy rate of over 95 percent.

Description

technical field [0001] The invention relates to a method for measuring the tensile strength of fiber monofilament. Background technique [0002] In 1991, Japanese scholar Lijima reported the synthesis of carbon nanotubes for the first time, setting off a wave of research on nanofibers. Nanofibers, that is, one-dimensional nanomaterials, can be divided into nanotubes, nanowires, nanobelts, and nanocables according to their morphology. Due to the nano-size effect, nanofibers can exhibit many properties different from bulk materials, such as novel optical, electrical, and catalytic properties, and have great application prospects in the fields of microelectronics, optoelectronics, and nanocatalysis; at the same time, nanofibers It also has excellent mechanical properties, elastic modulus and tensile strength can be close to theoretical values ​​(such as carbon nanotubes and silicon carbide nanofibers), and has extremely important applications in the field of reinforced metal-b...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N3/04
Inventor 张晓东温广武黄小萧
Owner HARBIN INST OF TECH