Preparation method of a sandwich-shaped flexible temperature sensor

A temperature sensor and sandwich technology, applied to thermometers, thermometers, instruments, etc. that are directly sensitive to heat/magnetic elements, can solve the problem of increasing the electrostatic repulsion on the surface of particles, reducing the van der Waals force between graphene particles, and increasing graphene sheets Layer distance etc.

Active Publication Date: 2021-05-18
CENT SOUTH UNIV
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0005] The invention provides a manufacturing method of a sandwich-shaped flexible temperature sensor, which reduces the Van der Waals force between graphene particles and increases the electrostatic repulsion between the particle surfaces to increase the temperature of the graphene by preparing a conductive layer with graphene dispersion alone. The distance between the sheets, thereby weakening the agglomeration effect, thereby solving the technical problem that the resistance temperature change rate of the existing flexible sensor is very small and the sensitivity to temperature is not high

Method used

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  • Preparation method of a sandwich-shaped flexible temperature sensor
  • Preparation method of a sandwich-shaped flexible temperature sensor
  • Preparation method of a sandwich-shaped flexible temperature sensor

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Embodiment 1

[0042] Such as figure 1 As shown, the present invention discloses a sandwich-shaped flexible temperature sensor, which includes an upper substrate 1 and a lower substrate 3 that are arranged up and down, and a strip-shaped sensor that is arranged in the bonding surface between the upper substrate 1 and the lower substrate 3 Conductive layer 2, and two conductive adhesive tapes that are respectively connected to the two ends of the conductive layer 2 and protrude from the bonding surface;

[0043] The upper substrate 1 and the lower substrate 3 are prepared from PDMS monomer and curing agent;

[0044] The conductive layer 2 is prepared from a graphene dispersion.

[0045] In addition, this embodiment 1 discloses a method for preparing the sandwich-shaped flexible temperature sensor, which specifically includes the following steps:

[0046] Prepare a PDMS curing solution, and inject the PDMS curing solution into the first groove mold, and obtain the lower substrate 3 after cur...

Embodiment 2

[0052] This embodiment is an extended embodiment of the first embodiment, and its difference from the first embodiment is that the preparation of the upper and lower substrates and the preparation of the conductive layer are refined, and the performance of the prepared flexible sensor is tested. Specifically:

[0053] Preparation of upper and lower substrates

[0054] As a flexible temperature sensor used in the wearable field, the "sandwich structure" requires its substrate to have excellent flexibility. PDMS has the advantages of wide temperature range, good biocompatibility and low preparation cost. Therefore, in this experiment, PDMS was selected as the upper and lower substrates of the "sandwich", and a sandwich-shaped flexible temperature sensor was designed and manufactured. The preparation of PDMS is obtained by mixing monomers and curing agents according to a certain ratio, and curing conditions at a certain temperature and time to finally obtain PDMS flexible mater...

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Abstract

The invention discloses a method for preparing a sandwich-shaped flexible temperature sensor. A conductive layer is separately prepared through a graphene dispersion, and the conductive layer is embedded between an upper substrate and a lower substrate prepared by PDMS material to reduce the number of graphene particles. The van der Waals force between the particles, and increase the electrostatic repulsion between the particle surfaces to increase the distance between the graphene sheets, thereby weakening the agglomeration effect, thereby increasing the resistance temperature change rate of the flexible sensor, and improving the sensitivity of the flexible sensor to temperature changes. To solve the technical problem that the resistance temperature change rate of the existing flexible sensor is very small and the sensitivity to temperature is not high, and the PDMS material is used as the upper and lower substrates, and the graphene material is separately prepared as the conductive layer, so that the flexible sensor has both Excellent properties of graphene and flexibility of PDMS.

Description

technical field [0001] The invention relates to the technical field of manufacturing temperature sensors, in particular to a manufacturing method of a sandwich-shaped flexible temperature sensor. Background technique [0002] Flexible temperature sensors are more and more widely used in daily life, medical and health fields, such as the detection of health indicators and the prevention of postoperative complications. Graphene has been widely used in the research of flexible sensor materials because of its excellent mechanical properties, thermal properties and ultra-high electron mobility. In the prior art, when using graphene to prepare flexible sensors, it is usually selected to incorporate graphene into the elastomeric PDMS matrix, which combines the excellent characteristics of graphene with the flexibility and ductility of the elastomeric PDMS matrix. A high-sensitivity temperature sensor is prepared on a flexible template. For example, in the invention patent with the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01K7/16
CPCG01K7/16
Inventor 何虎潘旭东余胜宏朱文辉
Owner CENT SOUTH UNIV
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