Minitype resistance humidity sensor and its preparation method

Abstract

The invention discloses a minitype resistance humidity sensor and its preparation method. The sensor comprises a composite fiber beam and conductive circuits fixedly connected to both ends of the fiber beam, wherein the composite fiber beam consists of a PA66 nanofiber beam, a carbon nanotube and polyving akohol; the composite fiber beam is 30-120 mu m in diameter and 0.3-3 cm in length. The PA66 nano fiber beam is prepared by an electrostatic spinning technique, and then performed with ultrasound treatment in dispersing fluid of the carbon nanotube to prepare PA66 / CNTs composite fiber beam; finally, both ends of the composite fiber beam are connected with the conductive circuits and immersed in the water solution of polyving akohol; after immersion, the composite fiber beam is frozen and unfrozen or heated and dried, thus the minitype resistance humidity sensor is obtained. The sensor overcomes problems generally existed in the existing humidity sensor, and has advantages of low cost, low power consumption, fast response speed and others; the sensor applies a flexible base and its structure is miniaturized; the minitype resistance humidity sensor can be widely applied to every domain.

Description

technical field [0001] The invention belongs to the technical field of humidity sensitive materials, and in particular relates to a miniature resistive humidity sensor and a preparation method thereof. technical background [0002] Humidity sensor is widely used in daily life, industry, agriculture, national defense, military and other fields, and its performance is reliable, which has become the focus of current application systems. With the in-depth development of modernization and national economy, society has higher and higher requirements for humidity sensors. If the humidity cannot meet the requirements, the performance and quality of the produced materials and products will be greatly reduced, and the yield will be greatly reduced. [0003] Humidity sensors can measure the humidity of the environment, and are widely used in industry, agricultural production, meteorology, scientific research, environmental monitoring, national defense industry and other departments, an...

AI Technical Summary

Problems solved by technology

The original domestic humidity sensor with lithium chloride electrolyte as the humidity sensitive material cannot be widely used in various fields due to its narrow humidity sensing range and the need for multiple pieces to be used together, resulting in a large volume during use and easy deliquescence.

Although the commonly used semiconductor humidity sensor has certain advantages and is widely used in the process of use, its manufacturing process is complicated, the consistency is poor, and it needs to be heated and cleaned regularly, which consumes manpower and material resources and increases the cost of use.

Most of the humidity sensors currently used have disadvantages such as high power consumption, long response time, low measurement accuracy, and poor stability, and conventional humidity sensors are usually rigid and large in size. These characteristics greatly limit the use of humidity sensors in various fields. Wide range of applications within

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