Phosphoric acid-based nano thermal insulation material and preparation method thereof

Abstract

The invention relates to a phosphoric acid-based nano thermal insulation material and a preparation method thereof. The method comprises the following steps: (1) performing mechanical fusion on nano powder, ceramic chopped fibers and anti-radiation nanosheets to obtain a dispersed material; (2) adding a phosphoric acid-based solid-state adhesive into the dispersed material, and uniformly mixing to obtain a to-be-filled material; (3) filling the to-be-filled material into a mold, carrying out mold pressing, and demolding to obtain a nano thermal insulation material intermediate; and (4) carrying out curing treatment on the nano thermal insulation material intermediate to prepare the phosphoric acid-based nano thermal insulation material. According to the invention, the phosphoric acid-based solid-state adhesive is selected as a material mechanical strength reinforcing agent, so that the problem that the affinity of a traditional liquid adhesive and a solid-state material is poor is solved, and the problem that a traditional nano thermal insulation material is prone to powder falling and slag falling is effectively solved; and the two-dimensional nanosheets with excellent radiation shielding performance are adopted, so that the infrared radiation resistance of the material is effectively improved, and the high-temperature heat conductivity of the material is reduced.

Description

technical field [0001] The invention belongs to the technical field of preparation of nano heat insulation materials, in particular to a phosphoric acid-based nano heat insulation material and a preparation method thereof. Background technique [0002] The powder-based nano-insulation material is a nano-insulation material with ultra-low thermal conductivity prepared by dry molding with nano-powder as the main raw material. The material has excellent heat insulation performance and low preparation cost. field has good application. [0003] Traditional powder-based nano-insulation materials are prepared by physical assembly and pressing of nano-powders; the force between particles of physical assembly is weak, the surface is easy to drop powder, the mechanical strength of the material is poor, and the service life of nano-insulation materials is greatly reduced , the mechanical properties urgently need to be improved. In addition, the nano-insulation material has a porous m...

AI Technical Summary

Problems solved by technology

[0003]Traditional powder-based nano-insulation materials are prepared by physical assembly and pressing of nano-powders; the interaction between particles of physical assembly is weak, and the surface is easy to drop powder 1. The mechanical strength of the material is poor, the service life of the nano-insulation material is greatly reduced, and the mechanical properties need to be improved urgently

In addition, the nano-insulation material has a porous material structure, and the inside of the material is zero-dimensional nano-powder and one-dimensional chopped fiber. The material has poor infrared radiation shielding effect and high thermal conductivity at high temperature. It is urgent to improve nano-insulation. High temperature radiation shielding properties of materials

Chinese patent application CN112110677A discloses a method for preparing a rigid nano-insulation material based on a thermocompression bonding mechanism. The high-temperature radiation shielding performance and mechanical strength of the nano-insulation materials obtained under the application need to be further improved. The organic resin adhesive used in the material preparation has limited temperature resistance and is prone to failure when used under high temperature conditions.

Images