Sandwich-shaped flexible temperature sensor and preparation method thereof

A temperature sensor and sandwich technology, which is applied in the direction of thermometers, thermometers, instruments, etc., which use electrical/magnetic components that are directly sensitive to heat, can solve the problem of small temperature change rate of flexible sensor resistance, reduce van der Waals force between graphene particles, and increase particle size. Electrostatic repulsion between surfaces, etc., to reduce the agglomeration effect, increase the amount of strain and elastic modulus, and improve the sensitivity

Active Publication Date: 2019-11-22
CENT SOUTH UNIV
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

[0005] The invention provides a sandwich-shaped flexible temperature sensor and a manufacturing method thereof, which reduces the van der Waals force between graphene particles and increases the electrostatic repulsion between the particle surfaces to increase graphite The distance between the olefin 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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  • Sandwich-shaped flexible temperature sensor and preparation method thereof
  • Sandwich-shaped flexible temperature sensor and preparation method thereof
  • Sandwich-shaped flexible temperature sensor and preparation method thereof

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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 sandwich-shaped flexible temperature sensor and a preparation method thereof. A conductive layer is independently prepared through the graphene dispersion liquid, the conductive layer is embedded between an upper substrate and a lower substrate which are made of PDMS materials so that the Van der Waals' force among graphene particles is reduced, electrostatic repulsion between particle surfaces is increased to increase a distance between graphene sheet layers, the agglomeration effect is further weakened, so the resistance temperature change rate of the flexible sensor is increased, the sensitivity of the flexible sensor to temperature change is improved, and thereby technical problems that a flexible sensor is small in resistance temperature change rate and not high in temperature sensitivity in the prior art are solved, the PDMS materials are utilized as the upper substrate and the lower substrate, the graphene material is independently prepared into the conductive layer, and thereby the flexible sensor prepared by the method has excellent performance 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 sandwich-shaped flexible temperature sensor and a manufacturing method thereof. 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...

Claims

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Application Information

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Patent Type & Authority Applications(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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