Gas sensor fiber membrane and preparation method thereof

Abstract

The invention discloses a gas sensor fiber membrane and a preparation method. The gas sensor fiber membrane is formed by composite fiber materials through hot pressing, and the composite fiber consists of organic high molecules with the weight average molecular weight between 50 and 500 thousand and inorganic molecules, wherein the organic high molecules are selected from polyvinyl acetate, polyethylene oxide, polyvinyl alcohol, polylactic acid, polylactic acid-glycollic acid copolymers and polycaprolactone, the inorganic molecules are selected from tin acetate, palladium chloride, sodium chloride, calcium acetate and zinc butter, the organic high molecules and the inorganic molecules are mixed into electrostatic spinning solution after being respectively prepared into solution, then, the electrostatic spinning solution respectively carries out processes such as electrostatic spinning, hot pressing, high-temperature calcination and the like, and the gas sensor fiber membrane is prepared. The gas sensor fiber membrane has the characteristics of ultrahigh sensitivity and high selectivity, in addition, the microporous structure can be maintained at a high temperature, the preparation method is simple, the operation is easy, and the preparation method has wide application prospects in many fields.

Description

technical field [0001] The invention relates to an organic-inorganic composite material and a preparation method thereof, more specifically, a sensor fiber membrane and a preparation method thereof. Background technique [0002] Nanomaterials, especially inorganic nanomaterials, are widely used in catalysts, gas sensors, batteries, especially solar cells, and other technologies and new applications. The crystal size, crystal shape, surface area, and porosity of crystalline complexes can have a profound impact on their functional properties, and therefore, achieving precise control of these parameters is crucial for the development of novel nanomaterials and nanotechnology. [0003] It is very difficult to retain small grain size and nanopore size, prevent grain growth and make it denser under high temperature treatment conditions. However, the normal operating temperature of gas sensors and solid oxide fuel cells is only about several hundred degrees Celsius, which makes th...

AI Technical Summary

Problems solved by technology

Several methods have been proposed to inhibit grain growth and densification, including two-step sintering technology, molecular capping, deposition on non-porous templates, hot water treatment and surface grafting of organic molecules, etc., but the results are not satisfactory.