Preparation And Thermal Protection Performance Of Flexible Inorganic Nanofibrous Membranes

In various thermal disaster environments,excellent thermal insulation capability and stable mechanical properties of thermal protective materials are the keys to provide effective thermal protection capability.In the traditional thermal protection materials,the problems such as the low temperature resistance of the organic materials,the poor flexibility of the inorganic materials and the large weight limit the application scope of the materials.With the development of modern science and technology and the worldwide attention to safety protection,the thermal protection performance requirements of thermal protection materials are further improved.Therefore,it is of great significance to improve the flexibility and strength of inorganic materials through exploratory tests while preserving the good thermal properties.Nanotechnology is helpful to improve the properties of materials.Electrospinning is the most common one with low cost and good continuity.At present,there are many problems in the preparation of inorganic nanofibers by electrospinning,such as difficult spinning,high brittleness and low strength,and relatively few studies on the flexibility of inorganic oxide nanofibers.This topic for the brittleness of zirconia?ZrO₂?nanofibers,choose ethyl orthosilicate?TEOS?as stabilizer,polyethylene oxide?PEO?as a template for the preparation of polymer flexible nanofibrous membranes,and by adjusting the content of stabilizer and polymer template to optimize the fiber membrane flexibility and fiber diameter,the fiber membrane has a fine diameter on the basis of better flexibility,and the nano-size effect can be better brought into play.On the basis of the successful preparation of nanofibrous membranes with fine flexibility and fine diameter,the montmorillonite powder was used to modify the films,and the appropriate modification concentration was explored to increase the strength of the nanofiber membranes while keeping the flexibility.In order to explore the application performance of the prepared flexible ZrO₂ nanofibrous membranes and the modified nanofibrous membranes,the related properties of its morphology,structure,mechanical properties and thermal properties were tested and characterized,the structural changes of the fiber membrane before and after modification and the influence on the performance of the fiber membrane were analyzed.The research results show that the preparation of both flexible ZrO₂ nanofibrous film has the advantages of the light,non-combustible,insulating refractory,and the strength and thermal insulation of the modified composite nanofiber film are improved compared with those before modification.compared with the common fire-fighting clothing materials,it has excellent flame retardant and thermal properties,and it is expected as a new type of refractory insulation materials used in the safety protection fields,such as high temperature protection and chemical protection safety protection areas.