TY - JOUR
TI - Preparation and properties of silicate inorganic external wall insulation materials based on heat storage
AU - Li Qing
AU - Chen Hao
AU - Li Zhidong
JN - Thermal Science
PY - 2023
VL - 27
IS - 2
SP - 941
EP - 948
PT - Article
AB - In this article, the foaming slurry after the reaction of silicate inorganic  gelling material sodium silicate and foaming agent azodicamide is taken as  the main investigation object, and the mechanism of bubble nucleation and  the effect of physical parameters such as temperature, time, viscosity and  surface tension on the structure of bubble pores are analyzed. As well as  the influence of processing technology such as foiling temperature, heating  rate, holding time and various kinds of modifiers on the structure and  properties of the material, the appropriate processing technology conditions  and modifiers are screened out, and an inorganic foiling insulation material  with light weight, high strength, heat preservation, fire prevention, no  pollution, low cost, simple process and easy to use is prepared. The  experimental results show that, although the properties of the prepared  material are better with the increase of azodicarbonamide (ADC) content and  viscosity, the maximum amount of ADC added is only 1%. When the ADC content  in the system is greater than 1%, the foaming slurry will appear gel, which  is not conducive to the late high temperature foaming and the uniformity of  the final product. Therefore, the optimal amount of ADC is 1% of the mass  of sodium silicate.