Flexible inorganic fiber material and preparation method thereof

Abstract

The invention relates to a flexible inorganic fiber material and a preparation method thereof. The preparation method of the flexible inorganic fiber material comprises the steps as follows: firstly, at least one metal source is dissolved in a solvent, a coupling agent and a surfactant are added sequentially and uniformly mixed to prepare a homogeneous and stable precursor solution which contains interpenetrating molecular chains adopting a three-dimensional network structure, and then a precursor fiber material is prepared by the precursor solution through a spinning forming process; and the precursor fiber material is calcined in an appropriate atmosphere to obtain the flexible inorganic fiber material. According to the invention, various inorganic fiber materials can be prepared through different spinning processes, the preparation process is simple and high in yield, and the prepared inorganic fiber material has good flexibility and has broad application prospect in the fields of catalysis, energy, electronics, filtration, thermal insulation and the like.

Description

technical field [0001] The invention belongs to the technical field of new materials, and relates to a flexible inorganic fiber material and a preparation method thereof, in particular to a flexible inorganic fiber material with a precursor solution having an interpenetrating three-dimensional network structure molecular chain as a spinning solution and a preparation method thereof. Specifically, flexible metal oxides, metal nitrides, metal sulfides and other fiber materials and their preparation methods. Background technique [0002] Inorganic fiber is a kind of chemical fiber made of minerals, mainly including glass fiber, quartz fiber, ceramic fiber, asbestos fiber, basalt fiber, metal fiber, etc. It is widely used in daily production and life. The products can be used in the fields of electronic appliances, transportation, chemical engineering, construction engineering, heat insulation and sound absorption, environmental protection, aerospace and military industry. At p...

AI Technical Summary

Problems solved by technology

At present, researchers have developed inorganic fiber materials using a variety of processes. While inorganic fibers have excellent properties, they also have problems such as high brittleness and poor mechanical properties, which greatly limit their practical applications.

[0003] Chinese patent CN200680032324 discloses a method for manufacturing a flexible ceramic composition, which uses sol-gel ceramic components and polymer components to mix electrospinning to produce flexible ceramic fibers. Chinese patent CN201310223225.9 discloses a silicon oxide / titanium oxide The preparation method of composite mesoporous flexible non-woven fiber membrane, however, these two patents need to add polymer in the preparation process of flexible ceramic fiber, not only the preparation process is complicated, but also the content of ceramic components in the hybrid fiber is low, resulting in the production of ceramic fiber after calcination low rate

These patents and articles all use sol-gel technology without adding polymers and surfactants. However, these methods require a long aging time during the preparation of the precursor solution, and the prepared fibers have poor uniformity in diameter and are prone to Fracture, unable to obtain flexible ceramic nanofibers

Catalysis Today 225(2014) 10-17 reported the preparation of mesoporous SiO by electrospinning technology 2 / TiO 2 Nanofibers, Journal of Colloid and Interface Science355 (2011) 328-333 reported the use of electrospinning technology to prepare porous Fe 2 o 3 / TiO 2 Nanofibers, these methods do not add polymers and surfactants, improve the spinnability of the precursor solution through aging, and prepare porous ceramic nanofibers. However, the fibers prepared by these methods have poor diameter uniformity, poor continuity, Problems such as single fiber defects make the fiber brittle, and it is impossible to obtain flexible ceramic nanofibers

Journal of Colloid and Interface Science 424 (2014) 49-55 and Ceramics International 38 (2012) 883-886 reported that by adding a coupling agent and a polymer to make a precursor solution, electrospinning to obtain flexible inorganic fibers, both articles Flexible inorganic fibers were prepared, but the content of inorganic components in the hybrid fibers was low, resulting in extremely low yield of inorganic fibers

Chinese patent CN201310102036.6 discloses a N / Si co-doped TiO 2 The preparation method of fiber, this method adopts one-step synthetic method to prepare organotitanium, mixes with coupling agent, then concentrates to obtain spinning solution, and adopts centrifugal spinning to obtain precursor short fiber, although this method has prepared TiO 2 Short fibers, but this method needs aging to improve spinnability, the process is very complicated, and the prepared fibers have poor continuity, and flexible inorganic fibers cannot be obtained

Images