A kind of flame-retardant nanoporous SIO2 multistage composite thermal insulation board and preparation method thereof

Abstract

The invention provides a novel flame-retardant nanopore SiO2 multistage compound insulation board and a preparation method thereof. The compound insulation board is formed by an organic foam inner core and an ultrathin inorganic cladding layer multistage compound; the multistage compound comprises a single-layer organic foam inner core and a multilayer ultrathin inorganic cladding layer compound, a multilayer organic foam inner core and a single-layer ultrathin inorganic cladding layer compound, and a multilayer organic foam inner core and a multilayer ultrathin inorganic cladding layer compound. According to the compound insulation board and the preparation method thereof, the preparation cost is low, the process is simple, conditions are mild, batch production of the compound insulation board can be realized, the compound insulation board has a wide application prospect in the fields of construction, traffic, petrochemical industry, aviation and aerospace, and energy source.

Description

technical field [0001] The technical field of the invention belongs to the field of building insulation materials, and relates to a method for preparing a flame-retardant and heat-insulating composite material, specifically a nanoporous SiO2 / inorganic fiber needle-punched felt multi-stage composite material and its preparation method. Background technique [0002] With the rapid advancement of my country's industrialization process, rapid economic development, and continuous improvement of urbanization, energy issues have become the main factor restricting economic development, and energy conservation is urgent. The development of thermal insulation materials is closely related to whether my country can realize the strategy of green, energy saving and sustainable development. As our country pays more and more attention to energy conservation and environmental protection, the insulation technology of building maintenance structures is also increasingly strengthened, especiall...

AI Technical Summary

Problems solved by technology

However, its poor mechanical properties and high cost limit its large-scale application in practical engineering.

Feng Junzong of National University of Defense Technology used tetraethyl orthosilicate as silicon source, prepared sol by acid-base two-step method, impregnated fiber felt in sol and then gelled, and prepared flexible thermal insulation composite material under supercritical drying (Feng Jun Zong, Rare Metal Materials and Engineering, 2008, 37 (2): 170-173), the raw materials of this document are similar to those of the composite felt in this patent, but the specific process and modification are more complicated, and the thickness of the prepared composite material is relatively high. thicker, more expensive

Chinese patent application number 95197068.2 "A composite material containing airgel, its preparation method and application" and Chinese patent application number 200510110528.5 "SiO2 airgel for adsorption-two-component non-woven felt composite material and its manufacturing process Method", also adopts the technology of SiO2 airgel and other materials, but its products mostly use inorganic fiber mats with high cost as the core material, and the overall cost is high, which limits its large-scale application in the field of building energy conservation

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