Preparation method of modified fiber based vacuum insulated panel core material

Abstract

The invention relates to the technical field of preparation of thermal insulation materials, in particular to a preparation method of a modified fiber based vacuum insulated panel core material. According to the preparation method, self-made aluminum silicate fiber is taken as a base material, sieved self-made calcium silicate powder and modified ground powder are taken as an accelerant, the basematerial and the accelerant are supplemented by polyacrylamide and amber powder, and the modified fiber based vacuum insulated panel core material is prepared. Firstly, aluminum oxide and silica are molten, and the self-made aluminum silicate fiber is obtained and can effectively insulate heat and prevent oxygen from being contacted with flammable substances; self-made calcium hydroxide, silicon oxide and deionized water are mixed to generate calcium silicate hydrate, a C-Si-H gel thin layer is formed on the surface of the system, calcium silicate hydrate and the base material constitute a three-dimensional net structure, so that waterproofness of the vacuum insulated panel core material is improved, aluminum hydroxide and magnesium hydroxide mixed powder is subjected to surface chemical modification by stearic acid, accordingly, ground powder has good compatibility in the system, combustion is further prevented, and the preparation method has broad application prospects.

Description

technical field [0001] The invention relates to the technical field of heat insulation material preparation, in particular to a preparation method of a modified fiber-based vacuum heat insulation board core material. Background technique [0002] Vacuum insulation technology is an important new energy technology in the 21st century. Vacuum insulation panel (VIP for short) is one of the vacuum insulation materials, and it is also a new type of high-efficiency insulation material developed in recent years. [0003] Vacuum insulation panels are generally composed of filling core material, getter and barrier film. First, the barrier film is made into a barrier bag, and the filling core material and getter are put into the barrier bag to vacuumize and then heat-seal. The gas barrier film can keep the bag in a vacuum state, effectively avoid heat transfer caused by air convection, and insulate it from the outside world. The thermal conductivity of vacuum insulation panels is belo...

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is that the core material of ordinary vacuum insulation panels has poor fire resistance and high thermal conductivity, which will damage buildings or other equipment, and at the same time, it is easy to absorb water in a humid environment, gradually loses strength, and cannot satisfy the market The deficiencies of the claim, a method for the preparation of a modified fiber-based vacuum insulation panel core material is provided