Modification Of Polyacrylamide Gel And Preparation Of High Performance Fireproof Glass

Fire-resistant glass has been widely used in building fire protection because of its fire-resistant and heat-insulating properties that cannot be achieved by ordinary glass,as well as its transparent and beautiful material properties.Due to the backward production process,there are many problems in the current composite fire-retardant glass,such as poor flame-retardant and heat-insulating properties,inferior water retention performance,bubble problem,and weak UV resistance.To solve these problems,the polyacrylamide gels were modified by copolymerization modification,blend modification,and introduction of high-valence metal ions.There’s an experimental study on thermal stability of the gels,water absorption and water retention properties of the gels and elasticity of the gels.In addition,this paper studies the thermal properties,bubble and volume shrinkage of the composite fireproof glass.Studies have shown that the polyacrylamide gels prepared by the blending modification of aqueous organosilicon A and XF composite flame retardants have a fine and compact meshless microstructure and outstanding resistance to thermal deformation.The modified gel forms a carbonized layer with a certain mechanical strength after being exposed to fire,showing a dense and regular surface morphology and a sintering ceramization phenomenon,which can effectively block the further transmission of the heat insulation amount.The fire-retardant glass prepared by the modified gel has excellent thermal insulation performance.Under the heating rate of 20℃/min,the effective insulation time of the fire-resistant glass is 52 min.The polyacrylamide gel modified by copolymerization of acrylic acid has better water absorption and retention ability.It was found that both the degree of acrylic acid neutralization and the amount of acrylic acid affected the water absorption and retention properties of the gel.Under experimental conditions,the degree of neutralization of acrylic acid is 70%,and the water absorption of the modified gel reaches a maximum of 287g/g when m _AA:m_AM=3:1.Introducing Al³⁺ions can improve the elastic modulus of the polyacrylamide gel.The gel elastic modulus of 4%alum is 5.76×10⁴Pa,which is 77%higher than ordinary gel.In order to make the research more meaningful in the field of production and application,this paper studied the influencing factors which affect the structure and properties of the polyacrylamide gel,and the influence of the process conditions to the composite fire-resistant glass with a corresponding solution.In the end,the experiment produced a fire-resistant glass with stronger fire-proofing and heat insulation,less bubbles,better water retention,and more comprehensive performance.