Pressure sensor, preparation method and application thereof, and wearable intelligent fabric comprising the pressure sensor

Abstract

The invention provides a pressure sensor, a preparation method and application thereof, and a wearable intelligent fabric comprising the pressure sensor. The pressure sensor is made of graphene modified polyurethane foam; wherein on the basis that the total mass of the graphene modified polyurethane foam is 100%, the mass percentage of the graphene is 0.8-2.5%. The wearable intelligent fabric prepared by the sensor provided by the invention is a wearable platform completely based on the fabric, and has a wide application value.

Description

technical field [0001] The invention belongs to the technical field of sensors, and relates to a pressure sensor, a preparation method and application thereof, and a wearable smart fabric containing the pressure sensor. Background technique [0002] In the past 30 years, the development of smart sensors has attracted great interest because of its huge application prospects in almost all industries such as health, sports, environment, etc. Traditional strain sensors are mainly based on metal and semiconductor materials, which have certain sensitivity, but the disadvantage is that the materials are often metal-based, usually hard, and uncomfortable to wear for a long time. At the same time, the materials themselves do not have transparency and viscoelasticity. The stretchability and sensitivity are low, and even the skin needs to be embedded to accurately measure human health and physiological signals, which limits the application range of strain sensors. For sensors, the mat...

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Problems solved by technology

[0005] CN105067159A discloses a capacitive pressure sensor and its preparation method. The capacitive pressure sensor is composed of an insulating layer and two substrates containing electrodes. The insulating layer is located between the two layers of electrodes. The insulating layer is porous Elastic film, which reduces the cost of capacitive pressure sensors, but does not really enable wearable functions on the base fabric

CN105387927A discloses a novel flexible vibration sensor, including three-dimensional graphene and an elastic polymer matrix, the three-dimensional graphene is coated inside the elastic polymer matrix, and the two ends of the three-dimensional graphene are provided with wires and pass through the elastic polymer matrix The substrate and wires are connected to three-dimensional graphene through silver glue. This patent has a wide spectrum, but it does not realize the idea of ​​wearable fabrics. In the process of use, due to the low adhesion between graphene and elastic polymers, the service life of the sensor shorter

CN106767374A discloses a method for preparing a flexible multifunctional strain sensor based on a three-dimensional graphene / carbon nanotube network. The method grows a three-dimensional network of three-dimensional graphene and one-dimensional carbon nanotubes by two-step chemical vapor deposition, and the three-dimensional The network is cured and combined with the elastic polymer as a flexible substrate to obtain a flexible wearable multifunctional electronic strain sensor based on the three-dimensional network of graphene and carbon nanotubes, but its sensitivity is not high enough, and it corresponds to the sensor through stretching. , the application is inconvenient

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