Flame retardant silica aerogel heat insulation composite material and preparation method thereof

Abstract

The invention relates to a flame retardant silica aerogel heat insulation composite material and a preparation method thereof. The preparation method comprises the following steps of: weighing raw materials according to weight percentage of raw materials; uniformly mixing silica aerogel and Al(OH)3 through a dry mixing process; adding silicon resin powder, mullite fiber and phenolic resin into the mixed materials, and uniformly mixing through a dry mixing process; putting the mixed materials into a pressing machine for heating and pressing; putting a pressed module into a machining equipment for machining; and finally, obtaining the flame retardant silica aerogel heat insulation composite material. The invention relates to the flame retardant silica aerogel heat insulation composite material with light weight and low heat conductivity, the silica aerogel heat insulation composite material and thermal property thereof, and materials of hydrophobic aerogel, hydrophilic aerogel and the like, and the application temperature is high and reaches to 600-1100 DEG C. The process technology achieves the technology level of Grace like products and is domestic original.

Description

technical field [0001] The invention relates to a preparation method of a flame-retardant and heat-insulating composite material, in particular to a flame-retardant silicon airgel heat-insulating composite material and a preparation method thereof. Background technique [0002] In recent years, the energy issue has become a hot issue of concern to all countries in the world, and all countries are formulating relevant energy policies based on their own national conditions. While attaching importance to the development of new energy sources, countries also attach great importance to energy conservation. In our country, with the rapid development of the national economy, the problem of energy shortage has become increasingly prominent. For example, industrial furnaces and various high-temperature reactors are equipment that consume a large amount of energy. The energy consumption of kilns accounts for 40% to 70% of the total production energy consumption, and its thermal energ...

AI Technical Summary

Problems solved by technology

The reasons are as follows: ①The preparation process of airgel products is complicated, which is far from the traditional silica gel process. It is difficult to prepare airgel through the adjustment of process parameters in the traditional silica gel process; ②The product requires high purity, and SiO 2 The content is greater than 99.5%, and the impurity content is low, especially Fe 2 o 3 It should be less than 100ppm; ③The particle size distribution is narrow, and different applications require different particle size distributions. The micron-level classification of porous materials is difficult, and general crushing and grading equipment cannot do it; ④Surface treatment technology, the particle size reaches the micron level, the surface energy increases, and it is easy to Agglomeration makes it more difficult to disperse in the medium. In order to make it easy to disperse in different media and save energy, different surface treatment techniques must be used