Method for preparing polylactic acid flexible strain sensor of silver nanowire and application of polylactic acid flexible strain sensor

A technology of strain sensor and silver nanowire, which is applied in the direction of nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve the limitation of flexible strain sensor preparation and application, harsh processing conditions, difficult strain sensor, etc. problems, to achieve high stability, reduce processing costs, and simplify the production process

Inactive Publication Date: 2020-11-03
SHANDONG NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, polylactic acid is very brittle, has a low melting point, and requires harsh processing conditions. It is difficult to manufacture strain sensors suitable for precision sensing elements by mechanical processing methods.
The existence of the above problems has limited the preparation and application of flexible strain sensors or polylactic acid flexible strain sensors.

Method used

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  • Method for preparing polylactic acid flexible strain sensor of silver nanowire and application of polylactic acid flexible strain sensor
  • Method for preparing polylactic acid flexible strain sensor of silver nanowire and application of polylactic acid flexible strain sensor
  • Method for preparing polylactic acid flexible strain sensor of silver nanowire and application of polylactic acid flexible strain sensor

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Experimental program
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Effect test

Embodiment 1

[0041] Such as figure 1 As shown, a method for fabricating polylactic acid flexible strain sensors based on femtosecond laser, the specific steps are as follows:

[0042] (1), preparation of silver nanowire solution: add 70ml ethylene glycol (EG) solution to the beaker, then take two parts of 42ml ethylene glycol solution, add 0.672g silver nitrate crystals to one part, and add 0.672g to the other part The PVP and 7mg of sodium chloride crystals were mixed thoroughly in the three solutions and then added to a 200ml stainless steel autoclave for heat treatment at 160°C for 4h. After the reaction, the precipitate was centrifuged, washed three times with deionized water and absolute ethanol, and the final silver nanowire concentration was 2-10 mg / cm 3 . The centrifugation speed is 2000rpm, and the centrifugation time is 5min.

[0043] (2) Preparation of polylactic acid film: First, take about 10 g of 100-mesh polylactic acid particles and place them on a clean and pollution-fr...

Embodiment 2

[0048] A method for preparing polylactic acid flexible strain sensors based on femtosecond laser, the specific steps are as follows:

[0049] (1), preparation of silver nanowire solution: add 70ml ethylene glycol (EG) solution to the beaker, then take two parts of 42ml ethylene glycol solution, add 0.672g silver nitrate crystals to one part, and add 0.672g to the other part The PVP and 7mg of sodium chloride crystals were mixed thoroughly in the three solutions and then added to a 200ml stainless steel autoclave for heat treatment at 160°C for 4h. After the reaction, the precipitate was centrifuged, washed three times with deionized water and absolute ethanol, and the final silver nanowire concentration was 2-10 mg / cm 3 . The centrifugation speed is 2000rpm, and the centrifugation time is 5min.

[0050] (2) Preparation of polylactic acid film: First, take about 10 g of 100-mesh polylactic acid particles and place them on a clean and pollution-free glass sheet, and heat them ...

Embodiment 3

[0055] A method for preparing polylactic acid flexible strain sensors based on femtosecond laser, the specific steps are as follows:

[0056] (1), preparation of silver nanowire solution: add 70ml ethylene glycol (EG) solution to the beaker, then take two parts of 42ml ethylene glycol solution, add 0.672g silver nitrate crystals to one part, and add 0.672g to the other part The PVP and 7mg of sodium chloride crystals were mixed thoroughly in the three solutions and then added to a 200ml stainless steel autoclave for heat treatment at 160°C for 4h. After the reaction, the precipitate was centrifuged, washed three times with deionized water and absolute ethanol, and the final silver nanowire concentration was 2-10 mg / cm 3 . The centrifugation speed is 2000rpm, and the centrifugation time is 5min.

[0057] (2) Preparation of polylactic acid film: First, take about 10 g of 100-mesh polylactic acid particles and place them on a clean and pollution-free glass sheet, and heat them ...

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Abstract

The invention provides a method for preparing a polylactic acid flexible strain sensor with a silver nanowire and application of the polylactic acid flexible strain sensor, and the method comprises the following steps: heating a polylactic acid film, enabling the polylactic acid film to stand for a set time, and spin-coating a silver nanowire solution on the polylactic acid film; cutting the driedpolylactic acid film is cut, and binding a copper electrode to the edge through elargol and covering the area coated with the silver nanowires; focusing femtosecond laser pulses at different heightsand different positions, enabling the treated polylactic acid film to be subjected to three-dimensional processing, obtaining the flexible strain sensor. The preparation process is simple, and the preparation precision is high.

Description

technical field [0001] The disclosure belongs to the technical field of sensor preparation, and in particular relates to a method for preparing a silver nanowire polylactic acid flexible strain sensor and an application thereof. Background technique [0002] The statements in this section merely provide background information related to the present disclosure and do not necessarily constitute prior art. [0003] Compared with traditional sensors made of semiconductor and metal materials, thin-film strain sensors use polymers as substrates, which have improved portability, flexibility, and sensitivity. Thin film sensors with flexible substrates have gradually become an indispensable basic component of human-computer interaction smart devices in the fields of medical treatment and health. At present, commonly used flexible substrates include polyester, polyvinyl difluoride and other materials, which are favored due to their good mechanical properties and low cost. [0004] H...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B7/16B22F9/24B22F1/00B82Y30/00B82Y40/00
CPCG01B7/16B22F9/24B82Y30/00B82Y40/00B22F1/07B22F1/0547
Inventor 周玉翔程晨占子俊袁艺邹巧娇董思雨
Owner SHANDONG NORMAL UNIV
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